JP4738686B2 - Self-developing photographic film assembly having removable parts - Google Patents

Description

[0001]
(Cross-reference of related applications)
This application claims not only the benefit of pending provisional US patent application 60 / 156,984 filed with the US Patent and Trademark Office on October 1, 1999, but also US patent application Ser. No. 08/959. , 361 (currently US Pat. No. 5,981,137 issued Nov. 9, 1999).
[0002]
(Background of the Invention)
The present invention relates generally to self-developing film assemblies and, more particularly, of this type having a plurality of interconnected imaging units (which are individually separable relative to each other). With respect to the improved film assembly, each unit now allows its associated fluid container and trap to be removed.
[0003]
So-called self-developing photographic film assemblies are generally classified as so-called “peel-apart” and “integral” types. In this peeling type, there is provided a rule that an image supporting sheet provided with a container or pod capable of rupturing a developing fluid and a photosensitive sheet combined in a lying relationship are exposed. The sheets pass through an assembly that applies pressure, which includes a pair of juxtaposed rollers that rupture the container to develop the fluid and begin developing the exposure latent image. . Excess fluid passing between these sheets is collected in a fluid trap. The user peels off the image support while the pod and trap area remain associated with the film assembly.
[0004]
The integral film unit described in U.S. Pat. Nos. 3,415,645; 3,695,884; 3,833,382, assigned to the assignee of the present application, is a ruptureable container or pod, image The support area and fluid trap are considered self-contained in that they remain together or completely as a unit both before and after exposure. Development is carried out by passing the film unit through a developing roller (which bursts the pod, sprays the developer and starts development). This trap captures excess developer fluid. Thus, for example, the film unit that emerges from the camera is hermetically sealed. US Pat. No. 5,888,683 describes another example sealed film assembly in the form of an elongated strip (which includes a plurality of film units or frames carried thereby), Thus, each of these units is separable from the others.
[0005]
However, for a variety of reasons, it is desirable for a user of an integrated film unit to be able to hold a used pod and an image support portion without an associated trap. Attempts to achieve such pod and trap removal are known. For example, US Pat. No. 2,634,886 assigned to the assignee of the present application uses exfoliation using semi-perforations that can manually cut positives from adjacent areas of the film assembly containing the pod and trap. A mold film assembly is disclosed. U.S. Pat. No. 3,804,626 discloses a film assembly in which the pod and trap are separated into film units, where developer fluid activation is performed to seal the rear end of the film unit. Adhesive is provided. U.S. Pat. No. 4,693,963 uses perforations between the positive and the pod to allow the latter to be manually separated so that undesirable elements of this film assembly can be discarded. . This patent also teaches sealing along the open edge of the film resulting from separation. Sealing may be accomplished with a pressure sensitive adhesive or developer fluid adhesive on one or more of the facing surfaces of the open edge. As a result, the integrity of the developed film unit is maintained with the prevention of developer fluid leakage.
[0006]
Efforts have been made in line with the principles set forth above, but nevertheless in a manner that substantially minimizes and / or seals developer fluid leakage either before or after film development. There continues to be a desire to improve the ease and reliability of such self-developing film assemblies, fluid pods and trap portions.
[0007]
(Summary of the Invention)
According to the present invention, an improved self-developing film assembly is provided. The film assembly includes the following parts: a developing fluid supply assembly that includes a rupturable container or reservoir of developing fluid at the front end portion of the unit; A recording assembly, the image recording assembly including first and second overlying layers, one layer of the overlying layer being exposureable to form a photographic latent image; And the spacer assembly is coupled between the first and second layers to provide a development space therebetween for passing developer fluid therethrough; a fluid trap assembly comprising the trap The assembly collects excess developer fluid at the rear end of the film unit and moving through the development space; A fluid-tight coupling assembly, wherein the first liquid-tight coupling assembly fluidly couples the reservoir to the front end of the development space to allow the developer fluid from the ruptured reservoir to A fluid passage for introducing into the development space and initiating development of the latent image; and a second liquid tight coupling assembly, wherein the second liquid tight coupling assembly has a rear end of the development space at the rear end thereof. A fluid passage is included for fluidly coupling to the trap assembly and for allowing developer fluid to enter the trap assembly. In the preferred illustrative embodiment, not only the ends of the first and second film unit layers, but also the spacer means includes a fragile segment, which when separated by hand is separated Is possible. Preferably, the frangible segment includes a tearable zone with associated perforations and lands. These perforations and lands are configured relative to each other to facilitate and guide tear along a predetermined path and tear line, but the land is developed along the path substantially perpendicular to the tear line. Furthermore, the operator has sufficient strength to allow the perforated film assembly to be pulled under tension by advancing the film. The first and second fluid coupling assemblies are attached to the first and second layers to cover and seal the tearable zone.
[0008]
In the illustrated embodiment, the spacer means is provided with a weak longitudinal edge that facilitates the propagation of tears therethrough. In still other embodiments, the perforations in each layer are spaced apart or properly aligned laterally from this side edge to facilitate separation along the tear direction, If this film unit is drawn obliquely with the planned linear direction, premature separation is prevented. In other preferred embodiments, the first and second liquid tight coupling assemblies are sealably secured to the opposing ends of the first and second layers of the film unit, respectively, at the inner ends. The tearable zone is located inboard from each individual end of the film unit, so that the zone is sealed by these layers and the coupling remaining on these layers Any separate segment of the assembly is within this film unit, thereby providing a smooth edge.
[0009]
In yet another embodiment, provisions are provided for the developer fluid activated adhesive along these perforations on both sides of the tear line, on the facing side of the liquid tight coupling. The adhesive is arranged such that, following tearing along these perforations, such mutually facing surfaces can be sealed together. Thus, not only can the layers of the film unit be sealed, but also the separate ends of the first and second coupling members can be sealed. Thereby, developer fluid leakage is substantially eliminated or minimized.
[0010]
According to another preferred embodiment, provisions are provided for the first and second flow-tight coupling assemblies, each at the opposite end of the film unit, with the first and second coupling elements and corresponding ones. First pair Total Includes a long member. The first coupling element is sealably secured at one end to the inner end of the first layer of the film unit, and the second coupling element is the inner end of the second layer of the film unit. One end part is fixed to the part so as to be sealed. Opposing end portions of the first coupling element have a pair of Total Whereas the opposite end of the second coupling element is secured to one end of the elongate member in a sealable manner, Total The other end of the long member is hermetically fixed. The second liquid tight coupling assembly includes a second pair of first and second coupling elements and a corresponding second pair of Total A first member of the second pair is sealably secured at one end to one longitudinally opposed inner end of the first and second layers, and The second coupling element is sealably fixed to the other longitudinally opposite inner surface of the first and second layers. The opposing ends of the second pair of first coupling elements are Total Whereas the opposite ends of the second pair of second coupling elements are sealed against one end of the elongate member, the second pair Total The other end of the long member is hermetically fixed. Of these pairs Total The elongate member includes not only the perforations and lands of the structure described above, but also the registered spacing of the end perforations relative to the film unit.
[0011]
Furthermore, provisions are also made for a method of manufacturing such a film assembly in a reliable and economical manner.
[0012]
Accordingly, it is an object of the present invention to provide a novel improved film assembly and a method for producing a self-developing film assembly that produces a relatively versatile film that is simple and easy to operate but reliable. is there.
[0013]
Another object of the present invention is to provide a new and improved film assembly of the type described at the end, where the developer fluid pod and associated film trap are separated from the image support portion by tearing. Detachable.
[0014]
Yet another object of the present invention is to provide a film assembly of the type described above, wherein the remaining ends of these image support portions are sealable.
[0015]
The above and other objects and scope of the invention will become apparent upon reading the detailed description when taken in conjunction with the accompanying drawings, in which like reference numerals refer to like structures throughout the several views. Indicates.
[0016]
(Detailed explanation)
Reference is made to entitled, co-pending, non-provisional non-provisional U.S. patent application Ser. No. 08 / 959,361, the contents of which are incorporated herein by reference and are incorporated herein by reference. Eggplant.
[0017]
In FIG. 2, the longitudinal direction Extend to A portion of the photographic film assembly 10 is illustrated as including a plurality of alternately spaced integrated self-developing film units 12; however, as described, the film units Can be manufactured from a self-developing release mold. The extending pairs of connecting strips 14a-c and covering strips 15a-c are each connected to each of the film units 12 in an alternating linear arrangement so as to form a continuous longitudinal film assembly. The film assembly 10 is conveniently subdivided into separable individual image units or frames 16a, b, which are from ten weak or frangible portions 18 on a pair of connecting strips 14b to ten or Longitudinal to the equivalent portion 18 on the adjacent pair of twelve frames (which may be the connecting strip 14a) Extension ing. In some embodiments, multiple frames can be made. In fact, hundreds are concatenated in series. As will be discussed below, the weak or fragile segment 18 preferably corresponds to a structurally weak portion, which allows easy separation of successive individual frames 16a, b. . FIG. 1 illustrates one procedure in the production of the film assembly of the present invention.
[0018]
In essence, each of the film frames 16a, b is one of the film units 12, a rupturable container or pod 20 (which contains developer and is located adjacent to the leading edge of the film unit 12). ), And a trap 22 (which is adjacent to the trailing edge of the film unit 12). Trap 22 is adapted to collect excess developer from the ruptured pod (this developer is not consumed during development of film unit 12). Both the rupturable pod or container 20 and the trap 22 are secured as described, for example, by laminating them in pairs of connecting strips and coated strips in various successive steps with a hot melt adhesive. The A hot melt laminator is provided to secure the pod and trap to the connecting and covering sheets as desired. Cooperating pairs of connecting strips and covering strips can be made from a variety of materials and in this embodiment can be masking materials of the type used in self-development techniques.
[0019]
Reference is made to the sandwich structure of individual film units. Each is identical, so describing one is enough for everything. In essence, this sandwich structure includes a layer or sheet of image-receiving member 30, and in a superimposed relationship therewith, not only is the layer or sheet of photosensitive member 32 substantially coextensive, but in between there is a longitudinal In the direction Extension A pair of rails 34a and 34b are stacked, and these are arranged at intervals along the edge of the film unit. Although not shown, the film unit 12 can also be peelable, where each member 30 and 32 can be separated after development. In one example of a peelable film, the photosensitive member can be manufactured from a so-called “Excedrin” type, where light passes through and is substantially coextensible and a superimposable cover sheet (which includes a pair of sheets). With side rails). Such a cover sheet is releasably laminated on the photosensitive member. In such an embodiment, the cover sheet and rail replace the member 30 and rails 34a, b and can be removed from the overlay relationship after the image is developed. Other release shapes are contemplated.
[0020]
Reference is made to FIGS. One method of manufacturing the integrated film assembly includes using one roll of a laminated film sandwich structure. The rolled sandwich structure generally becomes individual film units 12 when cut laterally. Not only the web width of this sandwich, but also the spacing of these transverse cuts can be varied, thereby allowing film units of different sizes and aspect ratios to be formed. Therefore, the illustrated configuration of the film unit is representative of many different variations that are possible because of the sandwich structure. To form a rolled and laminated sandwich structure, the strip of photosensitive sheet material 30 and the strip of image-receiving sheet material 32 are fed to the nip of the counter-rotating laminating roller of a rotary feeder (not shown). By feeding, they are intimately engaged with each other in a coextensible relationship. At the same time, a pair of strips of rail material are fed along opposing longitudinal edges; each comes from its appropriate roll. These rails have the appropriate thickness for the particular film assembly that can be used with them. These rails are sandwiched between the sheets 30 and 32, as described above, and are located along their opposing longitudinal edges. Heat and pressure conditions are selected for the time to ensure the desired lamination. This pressure and time is selected with the desired binding. For example, these rollers can both be steel, both rubber coated, or one can be rubber coated and the other can be steel. Thereafter, the appropriately laminated sheets are preferably wound on a spool to provide a film supply roll. If the laminated film supply 18 is wound on a spool, the radius and winding tension of the spool are equally carefully selected so as not to cause excessive bending of the composite sandwich; The parts facing each other are located between the two rails 34a, 34b.
[0021]
When transporting these sheets and rails from the roll to the nip, it is important to maintain proper tension within the individual sheets and rails and between the sheets and rails, respectively. Since the film supply 18 has a composite material structure, if the tension between the image receiving member 30 and the photosensitive member 32 during lamination is uneven, the film supply 18 may be curled after lamination. As an example, if the supply tension of the image receiving member 30 is higher than the tension of the photosensitive member 32 before this nip, the image receiving member 30 expands and relaxes (or contracts) after lamination. . The film supply 18 therefore curls with the photosensitive member 32 to form a convex surface and the image receiving member 30 forms a concave surface.
[0022]
As noted above, the heat generated from the lamination process also adversely affects the properties of this photographic sheet and possibly other materials or components. These rollers are thus manufactured in a manner that does not contact the surface of the image receiving member 30 and / or the photosensitive member 32 except for the lateral edges of the film supply 18 including the rail portions 34a, 34b. obtain. This causes the radial depression of this roller (which can be filled with a material with low thermal conductivity, such as a rubber compound) in the longitudinal direction. Total It can be achieved by lengthening. This idea can be applied to other film structures in addition to the embodiment depicted in FIG.
[0023]
The rail material generally contains a PET substrate on which a thin layer of another material (preferably a composite material (eg paper / fiber)) or preferably a liquid coating (which is dry Result in the desired thickness) or either. Subsequently, an adhesive that melts upon application of heat is applied to both sides of the rails. The active temperature of this adhesive will vary depending on several factors, including the specific application. The thickness of these rail portions is adjusted as described above to facilitate matching the photosensitivity. One way to accomplish this is to make one of these layers somewhat thinner than the optimum rail thickness, the second layer is thinner and its thickness needs to get the correct photometric measurement. Can be changed according to requirements.
[0024]
One advantage of the aforementioned sandwich relationship is that the photosensitivity relationship of the photosensitive strip and the image receiving strip can be very easily adjusted by appropriately adjusting the thickness of the rail in a known manner; Thus, the thickness of the gap between the image receiving member and the photosensitive member can be set by adjusting the thickness of these rails. Because of the requirement to photometrically match the image receiving member 30 and the photosensitive member 32 with each other and the rail portions 34a, 34b, the film supply 18 is preassembled, preferably at the factory, in the various embodiments described below. In this case, their photosensitivity characteristics can be measured and adjusted if necessary.
[0025]
Although the foregoing embodiments disclose rail preferences, the present invention contemplates the case where no rail is required between the image receiving member 30 and the photosensitive member 32. The above-mentioned mechanical gap desired for deployment is then obtained by a stepped roller. However, if a sandwiched rail is present, the film unit does not need to use a relatively expensive step roller. In fact, instead, a relatively inexpensive, generally cylindrical deployment roller can be used.
[0026]
Referring now to FIG. 4, some segments of this film unit are shown. Individual film units 12 are later cut apart (eg, cut using a hand cutter in the assembly or cut by a high speed mechanical chopper). Other cutting devices (eg lasers etc.) can be used. The two members 30, 32 and the rail portions 34a, 34b define a side opening 36 therebetween to allow the developer to pass therethrough. The image receiving member 30 and the photosensitive member 32 of each individual film unit 12 are preferably coextensive, and these rail portions are most preferably coextensive with their edges over the entire length of the film unit 12. is there. Therefore, the film unit 12 does not need to be further developed after separation. These separation cuts are preferably perpendicular to the film surface, but reduce the volume relative to any residual developer remaining in the space adjacent to the leading and trailing edges of the film unit 12, respectively. In order to do so, it can be angled.
[0027]
Although these film units can be cut from a rolled and laminated sandwich structure, other film unit construction methods are possible. For example, reference is made to FIG. 5 to describe another method of preferred film construction. As depicted therein, the strip of photosensitive material 32 advances alone in the direction of the arrow in the direction of the arrow; and the strip of image-receiving material 30 along the second path in the direction of the arrow. You can move forward and move perpendicular to the negative. In such a manner, the image receiving strip is secured thereto in an appropriately spaced manner by a transverse strip of rails 33 made from a suitable rail material in a known manner. Each of the rails 33 may have a width that is at least twice the width of the side rails of the desired film unit. Each of the rails 33 can be cut in the middle along the cutting line indicated by reference numeral 35 to form a segment of the two rails 34a, 34b. This cutting action results in the formation of individual sheets of image receiving members having pairs of side rails that are appropriately spaced. The appropriately dimensioned photosensitive member 32 can then be cut and laminated or glued or secured to the side rails 34a, 34b; thereby forming the corresponding film unit 12.
[0028]
Having described a method of manufacturing some of these film units, now refer now to FIGS. 2-4 in conjunction with FIGS. 6-8 to illustrate pod 20 and its attachment to film assembly 10. . It will be appreciated that a wide variety of pod structures can be used in this film assembly, and that the pods can be manufactured by known pod manufacturing methods and therefore a detailed description thereof is not necessary. In this embodiment, the pod 20 includes a composite sheet structure 40 made from an inner vinyl layer, an aluminum intermediate layer, and an outer paper layer. The pod sheet 40 is folded in the middle. In the resulting groove, a reservoir of liquid reagent is added and the top edge 42 of both folds is sealed along with its end edge, thereby obtaining a predetermined length of pod. The top edge seal is a predetermined bond that is relatively weaker than the other seals so that the pod can rupture along and spread the developer fluid. The pod is cut to the appropriate longitudinal dimension (that is, it matches the predetermined image width and depends on the film format used), is filled with a known developer, and the lateral edges A liquid-tight seal is provided by lamination along the top and rupture edges (which are opposed to the non-ruptured side of the pod, but not necessarily in that order). If desired, each pod can be sealed laterally along the seal line 44 so that there is a vinyl-to-vinyl contact that forms a sub-compartment of the pod. Formation of such a transverse seal is completed by thermally bonding together the vinyl inner layers of the opposing flaps of the pod. Later, these seals can be cut along these seal lines to form smaller pods of a predetermined length. However, this embodiment differs from the known pod structure in that it includes a string 23 located along the bottom of the V-shaped groove (see FIG. 6); It acts as a restraining means. The resistance generated at this point provides a reaction force, which is greater than the pulling force on the film unit, so that the breakable portion 18 can be broken and separated. However, this string structure defines a resistance that reacts directly to the rollers in the camera, not the walls of the pod itself. In addition, the string produces alignment protrusions or stops that act to correctly position the next continuous film unit of the strip at the desired focal cone in the camera. To form this lace stop, the lace 23 is placed at the bottom of the groove, and a portion of the groove directly above the lace is laminated together around the lace. In this regard, the vinyl surface on the inner surface of one leg 41 is laminated to the vinyl surface on the inner surface of the other leg 41. The pod is then filled and sealed in the known manner described above. This string therefore gives a bulge, which first engages with these rollers and thus separates the unwanted pulling forces that act directly by rupturing this pod, thus premature risk of pod rupture. Reduce.
[0029]
Although laces are disclosed, other materials and geometrically arranged cross-sections are contemplated. Of course, the end of the string is removed following insertion into the pod. It is also conceivable that other similar techniques can be used to form such braking protrusions; for example, molding or placement of structures on these connecting members, or between connecting members and covering strips. Insert material with. The present invention also contemplates having pods that can be manufactured from a variety of materials that can have a variety of shapes. In addition, the pod can include a metal-like structure to prevent undesired rupture of the pod due to cutting, or can be manufactured from a material that acts to resist cutting such as scissors. In addition, other equivalent braking structures could be used in place of the protrusions.
[0030]
Reference is made to FIGS. 9 and 10 for describing one of these trap embodiments. These various embodiments have in common that individual traps disposed on the assembly 10 are separated (eg, cut) to a desired length from a preassembled, preferably continuous tape. Since this trap structure is formed in the manner shown in the first mentioned pending application, a detailed description thereof is not necessary. It can be seen that the trap generally serves not only to collect excess developer but to neutralize it. In addition, the traps help to deploy these rollers away so that they do not force the fluid to rupture the trap seal and continue to move to the next unit. In this embodiment, a trap mask 60 having a generally V-shaped configuration is provided, which has one of the folds 62 heat sealed to one of these connecting sheets at its bottom and its top. It may have other folds 64 heat sealed to the cover sheet. A strip 66 of known trapping material is heat sealed to the inner surface of the fold 62. This trap structure is fed over the entire width of these connecting strips. Another type of trap is shown in FIG. 10, where a strip 66 of trap material is folded in the middle, and both folds 66a, b are each connected to this connecting sheet and coating by a stack of disclosed types. Appropriately fixed to the seat.
[0031]
After describing these pods and traps, a description of a cooperating pair of connecting and covering strips is given. In this regard, reference is made back to FIGS. As mentioned above, these cooperating strips are not only between the rupturable container 20 and the leading edge of the film unit 12 but also between the trailing edge of the film unit 12 and the trap 22. Is specified. These covering strips are generally coextensive in width with the connecting strips and are arranged on top of these connecting strips. These two strips are secured at their respective ends to the leading and trailing edges of the film unit 12, for example by means of a suitable hot melt adhesive. Further, these connecting strip and covering strip pairs are along side edges 26a, 26b proximate to the rupturable container 20 and along side edges 28a, 28b proximate to the trap 22. Fixed and liquid tight. In the region between the rupturable container 20 and the trap 22, these connecting strip and covering strip pairs are in a manner that seals the rupturable container 20 and the trap 22 from the environment in a liquid tight manner, for example by a hot melt laminator. , For example, by adhesive or heat sealing. These connecting strip and covering strip pairs are interleaved, end to end, in a liquid tight manner, eg, by heat sealing, along each side portion 42a, 42b to the film unit 12. Fixed. In addition, there is effectively a “zero gap” between the connecting strip 14 and covering strip 15 pair. These zero gap zones are well dimensioned to contain only a minor amount of residual developer after development. This zone can also accumulate any excess reagent (which could otherwise “back flow” into the opening of the film unit 12 and cause undesirable image artifacts). This zone also allows easy bending of the film assembly. Another advantage is that the relatively stiff portion of the image unit 12 (ie, the portion where the rupturable container 20 and trap 22 are secured to a pair of connecting strips) can be pulled out of the cooperating camera without bending. In contrast, all other parts of these strip pairs may be easily bent.
[0032]
First, in the first embodiment, referring to FIG. 3c, one covering strip 15 is provided for each pair of connecting strip and covering strip. The covering strip 15 has substantially the same length and width as the pair of connecting strips 14 and is aligned and arranged with the same extent, and for example, the edges 26a, 26b, 28a, 28b. Is secured to the pair of connecting strips 14 in the manner described above in the region between the rupturable container 20 and the trap 22. Instead of using a covering strip separate from these connecting strips to provide this fluid passage, a single widened connecting strip can be used, the width of which is along the edges adjacent to each other It can be folded vertically in the middle so that there is only one stack. These fluid passages can also be manufactured from a single member having a suitably shaped lumen therethrough for carrying the developer fluid. Of course, these film units must be inserted at the opposite ends of the lumen.
[0033]
As noted above, the film assembly 10 preferably includes a structurally weakened portion 18. Portion 18 is weakened, for example, with perforations to facilitate separation of adjacent image units 16a, b, etc. These perforations preferably define a tab 40, as shown, which is useful for pulling the leading image unit from a cooperating camera (not shown), thereby allowing manual development. And allows an inexpensive camera design. The tab 40 remains in the previous image unit separated by pulling after this separation. However, other methods suitable for separating the continuous image unit 16 (eg, notches along these lateral edges or external cutters) can also be used, such as the presence of tabs and those depicted in these drawings. It will be apparent to those skilled in the art that the position and shape are to be construed only as representative preferred embodiments of the present invention.
[0034]
In another embodiment of the invention depicted in FIG. 3d, the adjacent covering strip 15 of FIG. 3c is a first covering strip 15a1 (which covers the rupturable container 20). Extend And the front edge of the film unit 12 is preferably covered and sealed with a liquid tight seal along the edge 46b and a second covering strip 15b1 (which covers the trap 22). Extend And the trailing edge of the film unit 12 is preferably replaced with a liquid tight seal along the edge 46a.
[0035]
While developing the image units 16a, b, etc. with a cooperating camera (not shown), a suitable developing roller (also not shown) can rupture the rupturable roller 20, and the developer can be ruptured. From the container 20, it unfolds to the leading edge of the film unit 12 and through the film unit 12 into the opening 36. Any excess developer is present at the leading edge of the film unit 12 and moves to the trap 22.
[0036]
The preferred method of attaching and / or securing and / or sealing the various elements and components to each other is by thermal or pressure lamination using heat and / or pressure responsive adhesives, but also other methods (e.g. It can be seen that gluing or welding) is also conceivable. Such mounting methods are well known in the art. As mentioned above, the preferred process used to join the various parts of the film assembly 10 is by adhesive and by application of pressure and / or heat; this process is referred to as lamination. The most preferred laminating method is done by using a rotating laminator, where the parts to be laminated are merged in overlapping registration with the pressure applied between these rollers between the nips of the heated rollers. In the present invention, the photosensitive sheet, the plurality of rail sheets in the form of strips, and the image receiving sheet are taken from the separate supply rolls in that order and joined by combining them with the nip of the drive roller pair. The In order to register these sheets together, suitable guiding and tensioning means can be arranged in the usual manner. These rollers are adapted to provide proper pressure and temperature, and pressure and temperature uniformity to the rollers to ensure proper melting of the hot melt adhesive placed on the exposed surface of this rail material Has been.
[0037]
To illustrate the manufacturing method as well as another trap configuration of the present invention, reference is made to FIGS. 11 and 11a. As shown, the connecting strip 14 has a trap mask 70 whose proximal end 70 a is 72 and is adhesively attached to the middle of the connecting strip at 72. The distal end 70 b of the wrap mask is folded over the strip 74 of trap material and secured to the lateral edge of the film unit 12, thereby forming a trap 76. The lateral ends of the trap mask are then laminated to the side edges of the connecting strip so as to define a self-contained trap.
[0038]
In the embodiment of FIG. 11b, the pod structure of FIGS. 6-8 can be disposed, for example, on the connecting strip 14 adjacent to the trap 76, and a cover sheet 78 can cover the pod and secure it there in the middle. The opposing free ends of the sheet 78 can each be connected to the trap 76 at one end and to the adjacent film unit 12 at the other end. In this embodiment, a portion of the trap mask 70 may not be folded sharply over the trap mask 70 so that there is some excess. This excess allows the heat from this laminating process to be coupled to the trap material 74 with a reduced likelihood of bonding to itself when in the folded state.
[0039]
In FIG. 13, another embodiment is shown, where both the trap 76 ′ and the pod 80 can be foldably connected to the film unit 12 in the same manner as the trap 76 of the previous embodiment. Preliminarily, the pod and trap are secured to each one of the connecting strips 14 as described with the formation of the trap 76 above. As can be seen in FIG. 13 b, adjacent film frames 16 ′ can then be connected in series, for example by a pair of connecting strips 82. The connecting strip 82 can be manufactured from a masking material and bonded to the opposite ends of the film frame; see FIG. 13b. The connecting strip 82 is suitably heat sealed there between the film frames 16 '. The connecting strip 82 preferably has a fragile portion (not shown) to facilitate the separation of the frame. Although this embodiment discloses that these connecting strips are made from a masking material, the present invention also provides that the connecting strip 82 can be made of various materials (eg, preferably, relatively easily controlled). Paper with reliable tear properties). The film frame 16 'so pre-assembled for intercommunication with other frames forms an assembly that is likely to be able to use most frames assembled on this strip. This construction is advantageous in that even if one of these film frames is not correctly formed, the film frame connected to the strip need not be considered wasted. Rather, it is only necessary to discard and replace a frame that has been incorrectly formed or mounted.
[0040]
Figures 14a-c schematically represent various processes for forming another trap arrangement of the present invention. In this embodiment, the trap is double folded and the strip of trap material 66 'is secured by lamination at the junction of two overlapping trap masks 60a, 60b. Thereafter, the two masks 60a, 60b are folded as illustrated in FIG. 14c; thereby, they cause the top and bottom folds to be turned into one each of the top and bottom connecting sheets and the covering sheet. Can be fixed.
[0041]
The aforementioned preassembled sealed frame can then be secured to the preassembled pods and traps and connecting means. The use of these pre-assembled units is particularly advantageous, for example, when manufacturing a framework that uses manual labor (especially in a darkroom setting). In this connection, these pre-assembled frame units can be transported as individual units, together with pre-assembled pods, traps and connecting sheets or cover sheets (which are pre-manufactured). Another method is to pre-assemble the pods and traps into connecting strips to reach a film assembly manufactured and assembled in accordance with the present invention, then to assemble these film units in a dark room, It includes a step of covering a part that requires a covering sheet and laminating a covering member.
[0042]
According to the present invention, these film frames can be formed using pre-assembled parts or can be formed continuously. In accordance with the present invention, the structures of the present invention and their method of construction are intended to operate the same photographic apparatus (with the film assembly therefor) although this film assembly may have different structures. It is very versatile in that it can be used. This is a known approach (where the camera is provided with a single film format, whereby the structural change of the film and / or the method of assembling such a film is More likely to be disabled with the intended photographic device).
[0043]
Reference is now made to FIGS. 16-18 to illustrate another preferred embodiment of the present invention. In this regard, provisions are made for self-developing film assemblies of the type described above, where the pods and traps are reliably separated by tearing by the user and the remaining image receiving portions In addition to allowing the torn pod and trap element to be sealed, the ends of the can be sealed against fluid leakage.
[0044]
In this embodiment, the film assembly 110 is similar in many respects to the structure of the first embodiment. The film assembly 110 has a plurality of film frames 116, 116a, and 116b. Each of these film frames are interconnected in a fragile manner relative to each other. In addition, each frame is in turn fragile so that each self-developing film unit 112 carried by the frame is separated from the rest of the frame. Advantageously, the user can separate the film unit and discard both the pod and trap without leakage of residual developer fluid from its components.
[0045]
In order to facilitate the separation and sealing functions described above, Total of Long or coupling element pairs 150, 152; and 154, 156 are provided. For example, as illustrated in FIGS. 16 and 17, the lower coupling element 150 is laminated to each end of the coupling strip 114a and the photosensitive sheet 132, while the coupling element 154 is coupled to the coupling strip. 114 b and the photosensitive sheet 132 are stacked on the respective end portions. As illustrated in FIGS. 16 and 17, the upper coupling element 152 is laminated to each end of the connecting strip 114 and the receiving sheet 130, whereas the coupling element 156 includes the connecting strip 114c and It is laminated | stacked on each terminal part of the receiving sheet 130. FIG.
[0046]
All of these coupling elements are constructed identically, so it is sufficient to describe one. In FIG. 18, a coupling element 150 is illustrated, which preferably includes a thin, flexible, and generally flat wing-like laminate structure that includes a core 158, the same on one side of the core. And a substantially coherent layer 162 of developer fluid activated adhesive (such as Gantrez®) on the opposing surface of the core. In fact, a wide variety of materials can be selected for the core, and a wide variety of adhesives can be selected for the layers 160 and 162 (such materials are described herein for the core and layers). As long as it has the properties to achieve the described function). For example, the core 158 can be made from polyester; the adhesive layer 160 can be a hot melt adhesive of the type used in making self-developing films, or a cold weld adhesive; and the layer 162 can be Gantrez (As well as other suitable developer fluid activated adhesives). In this embodiment, each pair of these coupling laminates 150-156 has a combined thickness that is approximately comparable to the thickness of their rails at each end of the film unit. Although not shown, layer 162 may instead be composed of a plurality of dots, which are spaced over the surface of the core. Obviously, other geometrical adhesives are contemplated.
[0047]
In particular, the hot melt adhesive layer 160 of the coupling elements 150 and 154 is not only directly laminated at one end to the inner end face portion of the coupling elements 114a and 114b, respectively, but also the opposite inner longitudinal end of the photosensitive sheet 132. It is also laminated on the surface portion. The hot melt adhesive layer 160 of the coupling elements 152 and 156 is not only directly laminated at one end to the inner end face portion of the coupling elements 114 and 114c, respectively, but also the opposite inner longitudinal end face portion of the receiving sheet 130. Also laminated. There are several approaches to secure these coupling elements to the film unit layer. In one form, these coupling element pairs are ideally adapted to abut the ends of generally parallel rails 134 spaced laterally when the film unit 112 is installed. In such a case, these rails will have these coupling elements inside the edge of the film unit. Extending It is shortened by an amount comparable to accommodating the length to be. It can be seen that hot melt adhesive 170 is applied for use in fluid sealing beyond the lateral edges of the coupling element adjacent to the longitudinal edges of the film assembly. The developer fluid activated adhesive layer 162 is particularly adapted to be activated whenever it comes into direct contact with the developer fluid, such as when the film unit is being processed. It can be seen that the developer fluid flows over the layer 162 as it is deployed after being dispensed from the ruptured pod. In this embodiment, the Gantrez® coated portions are compressed together by a developing roller that squeezes developer to form a zero gap between these coupling elements. This action is important to adhesively bond together the Gantrez® portions facing each other to produce a seal.
[0048]
FIG. 24 shows another implementation illustrating a complementary taper at 180 between the rail 134 and the front corner of the coupling element 150 to enhance the sealing function provided by the film unit and coupling element. FIG. 6 is a view of the pod end of the form. FIG. 24 a illustrates another embodiment of joining the coupling element 172, which is a developer fluid activated adhesive layer 174 (over its one end within the inward edge of the film unit 112. For example, manufactured from Gantrez (registered trademark). The developer fluid activated adhesive layer 174 is shorter in width than the coupling elements 172 and the front corners of these coupling elements have an extended tapered portion 182 that is complementary to that of the tapered rail. It is.
[0049]
Although not shown, the present invention predicts that these coupling elements may have a width that fits between these rails (ideally, touching the inner edges of these rails).
[0050]
Preferably, a linear array 164 of perforations 166 is formed generally across each of these coupling elements in the position shown in FIG. Although these preferred embodiments contemplate the use of perforations, other types of frangible structures (eg score lines, micro-perforations, ultrasonic indentations or perforations) between these connecting members and this film ) Are considered to fall within the spirit and scope of the present invention. In particular, perforations 166 are formed generally across each core before adding the adhesive layer 160 to each core 158, thereby further creating a seal of these perforations against fluid leakage. help. Furthermore, layer 162 can provide a sealing effect if the core and layer 160 are perforated. Also, perforations caused by melting through this material can be resealed to the slits or perforations by reflow.
[0051]
The perforations 166 are preferably substantially transverse to the longitudinal axis of the coupling element, as can be seen in FIG. Extending And ends in an aligned position (which is shorter than the side edges of such elements and spaced from the side edges of the film unit and co-extensive connecting elements or sheets). These connecting elements have a predetermined area of hot melt adhesive 170 adjacent to the side edges of the coupling elements to provide a fluid seal around the ends of these coupling elements. This linear array of perforations is also located inward from the ends of the sheets 130,132.
[0052]
The perforations 166 are in terms of their size, shape and spacing relative to the strength obtained at the lands between them as compared to the tear propagation force required to obtain a tearing action through the laminate and the connecting element or strip. And optimized. In other words, no matter what material is selected for the coupling elements 150-156, the land between each perforation is individually weaker than the force required to propagate tears in the non-perforated region of the selected material. Should. In addition, the total strength of all lands across this film must be stronger than the force required to pull the film unit through the corresponding camera developing roller. It can be seen that individual perforations are not formed at the longitudinal edges of these connecting sheets. This is so as not to increase the ability to tear the film assembly (especially when the film assembly is pulled at an angle, for example, from a camera to a predetermined linear pull path). The end perforations 166 'of each array 164 are preferably spaced apart in a form aligned from the edges of these connecting elements so that tearing can begin at the connecting elements 114a-c. The spacing, size and shape of each perforation can be varied. As far as the perforated zone is concerned, it is very strong (during tension) but weak under tear loads. It will be appreciated that some materials (e.g. polyester) must have perforations or tears to tear by hand. In the illustrated embodiment, each end perforation in the linear array is spaced or aligned at a preset distance (eg, about 0.050 inch) from the edge of the film assembly. Has been. This spacing provides sufficient strength to these materials used to avoid premature tearing of the film if these materials are pulled from the camera at an undesired angle, but are not separated by tearing. It has been decided to make it easier. Each end of the masking element, as well as this sheet and negative, overlaps with perforations 166, thereby helping to seal the latter. Further sealing assemblies (eg strips (not shown) that can cover these perforations) are also conceivable.
[0053]
As noted above, the developer fluid layer 162 is activated after the developer fluid from the pod has moved through the film unit during development of the film unit. As a result, the operator can press the opposing layers 162 together, following tearing of these coupling elements, thereby sealing the ends of the film unit. The tear line is inward and the layer 162 seals the torn end inward of the film unit so that the user does not handle the reagent. Thus, little or no reagent is present at the ends of these film units.
[0054]
Further, the developer fluid adhesive layer 162 coated ends of the separate connecting elements 114-114c can be pressed together, thus sealing the scrap pod and trap ends, thereby preventing fluid leakage. And seal.
[0055]
The foregoing structure provides a clean edge that minimizes or eliminates the formation of jagged edges when tearing the ends 116a and 116b, respectively, in a simple and reliable manner, and pods from the film unit 112, respectively. It has been determined to facilitate separation of the trap ends 116 ', 116 ". The perforations 166 are formed inwardly as described above to tear the ends 116' and 116". Resulting in a straightly exposed edge and controlled to tear so that the torn edge is unlikely to protrude beyond the edge of the film unit 112. The perforations 166 can be formed in a wide variety of structures, but at any size, spacing or shape, the lands between them can be passed through the developing roller (not shown) in a predetermined manner without premature separation. It should have sufficient strength to allow the film unit to be pulled.
[0056]
Reference is made to another preferred embodiment illustrated in FIGS. This embodiment is similar to the previous embodiment, but the changes are described below. One difference is that the coupling element and connecting element spans one end of the film unit 112 within the inward edge of the film unit 112, such as a developer fluid activated adhesive layer 174 (e.g., Gantrez®). ) Produced in a single coupling element 172a-d. Again, the edge of Gantrez® should be clamped by the action of its spreading roller. The developer fluid activated adhesive layer 174 is narrower than the coupling elements 172a-d, so that the adhesive regions 170 'on the facing surfaces of these coupling elements allow fluid at their ends. A seal is obtained. The perforations 166 are configured to allow the film to be pulled and the pod and trap to be torn, as in the last embodiment. The end edges of the photosensitive and receiving sheets 130, 132 each overlap with the perforations 166, thereby further preventing this leakage of developer fluid. The end perforations of each array are aligned with the side edges of the film unit to prevent premature separation if the film assembly is pulled at an angle. These couplings are inward of the film unit when tearing along these perforations, and their ends (which are pressed together either by the operator or automatically by the action of these rollers) The separated ends are made sealable by the developer fluid activated adhesive layer formed in step 1). This embodiment is cheaper than the previous one and is simple to manufacture.
[0057]
Reference is made to still another preferred embodiment as illustrated in FIGS. In effect, these embodiments differ from the previous one because the film unit 212 itself is configured to facilitate separation and sealing of its ends following development of this unit.
[0058]
Toward this end, the negative ends 232, the longitudinal ends of the sheet 230 and the rail 234 are perforated at 266 instead of a connecting or coupling sheet. This advantageously eliminates the difficulties of accurately positioning the perforations inwardly at the end of the film unit and the corresponding precise placement of these coupling sheets and associated adhesive layers. It is important that the perforations 266 be configured to be at the inward and outward edges of each rail 234 so that such an arrangement can be made with a thicker rail without interrupting this tear. To facilitate the propagation of tears through. Of course, the perforations in these coextensive sheets, rails and negatives are aligned. Various methods can be used to form these perforations. The land between the individual perforations, like the other embodiments, not only facilitates the tensioning and pulling of the film unit through these developing rollers, but also tears laterally along the tear line. To make it easier.
[0059]
Coupling assemblies or sheets 214 and 214a-c are laminated to the outer surface of the film unit 212 to seal the perforations 266. The ends or assemblies of the coupling sheets 214, 214a-c are at their ends (which overlap the perforations 266, thereby providing a fluid seal against the latter), with a hot melt adhesive layer (not shown). )). Following the development and separation of the ends of the pod and trap, a development fluid activation placed in a pre-set position on the facing surfaces of the sheet and negative to fluid-tighten the ends of the sheet and negative. Regulations are provided for the adhesive layer 268. Layers 268 are on either side of perforations 266 Extended to And is activated following passage of the developer fluid thereon. It can be seen that the adhesive layers in the separate pod and trap portions can also seal their respective ends against fluid leakage. It can be seen that the developer fluid activated adhesive need not be present. This is because the tear line on the film unit provides a new edge, whereas the residual developer fluid is less likely to be present than the edge of the coupling sheet. Coupling assemblies 214, 214a-c are sealed to this film unit along their longitudinal edges in the manner described above.
[0060]
Referring to FIG. 23, instead of perforations, sheet 230 and negative 232 may have score lines 280 across them, as shown, which are the film unit from this pod and trap area. Forms fragile means that facilitate separation. These score lines are aligned with the tear propagation notch 282 at the outer edge of the rail 234. A series of micro notches 284 (the drawings are not drawn to scale) are formed at the inner edge of the rail. These micro notches minimize the criticality of aligning the rail notches with these score lines. Obviously, the micro notches 284 can be formed on both edges of this rail. This perforation placement is necessary to ensure that this tearing action continues throughout the film unit with virtually no interruption.
[0061]
FIGS. 25 and 26 illustrate another preferred embodiment of a self-developing film assembly 300 where the film unit 302 is spaced by a pair of rails 308 (only one is shown). A photosensitive layer 304 and an image receiving layer 306. Connection sheets 310a to 310d are fixed to the inward surfaces of the respective layers 304 and 306 by a conventional adhesive layer (not shown) or the like. The weakened fragile portions 312, 314 of the layers 304, 306 are preferably aligned perpendicular to the weakened fragile score line 316 at the inward ends of the sheets 310a-d when joined together. In this embodiment, the mutually opposing surfaces of these connecting sheets are provided with an alkaline adhesive (not shown). In this embodiment, the combined thickness of the unit 302 inwardly facing sheets is approximately equal to the thickness of this rail.
[0062]
While what is presently considered to be a preferred embodiment of the invention has been described, it will be readily apparent to those skilled in the art that various modifications can be made thereto without departing from the invention.
[Brief description of the drawings]
FIG. 1 is a block diagram of one preferred method of manufacturing a film in accordance with the present invention.
FIG. 2 is a perspective view of a film assembly, which can be manufactured according to the present invention.
FIG. 3a is a top plan view of the film assembly of the present invention.
FIG. 3b is a side view of the film assembly of FIG. 3a during assembly.
FIG. 3c is a side view of one embodiment of the film assembly of FIG. 3a after assembly.
FIG. 3d is a side view of another embodiment of the film assembly of FIG. 3a after assembly.
FIG. 4 is a partially exploded perspective view of the structure of an integral film strip prior to separation into individual film units used to manufacture the film assembly of the present invention.
FIG. 5 is a schematic diagram of one mode for producing this film.
FIG. 6 is a perspective view of one type of pod.
FIG. 7 is an end view of one type of pod.
FIG. 8 illustrates one form of a portion of a pod made in accordance with the present invention.
FIG. 9 illustrates one type of trap.
FIG. 10 illustrates another type of trap.
FIG. 11 illustrates another form of manufacturing a trap.
FIG. 11a illustrates another form of manufacturing a trap.
FIG. 11b illustrates another form of manufacturing this pod and trap.
FIG. 12 shows a schematic form of a pre-assembled film unit.
13a illustrates a process in the manufacture of the film frame of FIG.
FIG. 13b illustrates the steps involved in assembling the plurality of film frames of FIG.
FIG. 13c shows the connection between the film units shown in FIG. 13b in more detail.
FIG. 14a illustrates yet another method of manufacturing a trap according to the present invention.
FIG. 14b illustrates yet another method of manufacturing a trap according to the present invention.
FIG. 14c illustrates yet another method of manufacturing a trap according to the present invention.
FIG. 15 is a schematic view of a film assembly according to the present invention in a folded shape.
FIG. 16 is a schematic perspective view of still another preferred embodiment of a film assembly according to the present invention.
FIG. 17 is a schematic elevational view of the film assembly of FIG.
FIG. 18 is an enlarged perspective view of the coupling element of the film assembly of FIGS. 16 and 17;
FIG. 19 is a schematic perspective view of still another preferred embodiment of a film assembly according to the present invention.
FIG. 20 is a schematic elevational view of the film assembly of FIG.
FIG. 21 is a schematic perspective view of still another preferred embodiment of a film assembly according to the present invention.
22 is a schematic elevation view of the film assembly of FIG. 21. FIG.
FIG. 23 is a schematic perspective view of still another preferred embodiment of the film structure of FIG.
FIG. 24 illustrates an embodiment of the coupling between the coupling element and the film unit.
FIG. 24a illustrates an embodiment of a coupling between a coupling element and a film unit.
FIG. 25 is an exploded schematic perspective view of yet another preferred embodiment.
FIG. 26 is a schematic elevational view of the embodiment of FIG. 25.

Claims (14)

An improved self-developing film unit ,
The front end portion of the film unit, the rupturable reservoir of the developing fluid,
It includes first and second overline grayed layer, one layer of the overline grayed layer includes a self-developing image recording means of Ru exposable der to form a photographic latent image,
Is connected to them between said first and second overline grayed layer, providing development space therebetween, and spacer means for passing the developing fluid therethrough,
In the rear end portion of the film unit, a fluid trap assembly for collecting excess developing fluid which is moving through the development space,
A fluid passage for initiating development of said latent image developing fluid is introduced into the developing space ruptured reservoir seen containing a first liquid-tight coupling means for coupling the reservoir to the front end of the developing space ,
A second fluid-tight coupling means the viewing including the developing fluid a fluid passageway for placement into the trap assembly, coupled to said trap assembly rear end of the developing space,
With
End portion and said spacer means of said first and second overline grayed layer comprises a fragile segment, the frangible segment, the separable der so that when torn by hand with perforations and lands and Nde including a possible zone tearing perforations and lands, are disposed alternately so as to be and guides to facilitate tearing along a predetermined path and tear lines, the lands of the film unit under tension and have a sufficient strength to allow pulling, said first and second fluid coupling means, so as to seal covering the tearable zone, said first and second overline grayed layer The film unit that is installed. The spacer rail, are Bei Ete weak longitudinal edges to facilitate the propagation of the tear in the meantime, the film unit of claim 1. The perforations in each layer are spaced apart or properly aligned laterally from the side edges to facilitate separation along the tear line, but if the film unit is straight If drawn obliquely with respect to the path, to prevent the separation of the early film unit of claim 1. The first and second liquid tight coupling assemblies are sealably secured to opposite ends of the first and second layers, respectively, at an inner end, and the tearable zone includes the individual end portions. Located inwardly, so that the zone is sealed by the layer and any separate segment of the coupling assembly remaining on the layer is confined within the film unit The film unit of claim 1 , thereby providing a generally smooth edge. On both sides of the tear line, at least one of the two mutually facing surfaces of the fluid coupling further comprises a developer fluid activated adhesive , whereby the adhesive is along the perforations. Subsequent to the tearing, the mutually facing surfaces are arranged so that they can be sealed together, so that not only the layers of the film can be sealed but also the first The film unit of claim 1 , wherein the separated ends of the second coupling member are sealable, thereby eliminating or minimizing fluid leakage. An improved self-developing film unit ,
The front end portion of the film unit, the rupturable reservoir of the developing fluid,
It includes first and second overline grayed layer, one layer of the overline grayed layer includes a self-developing image recording means of Ru exposable der to form a photographic latent image,
Is connected to them between said first and second overline grayed layer, providing development space therebetween, and spacer means for passing the developing fluid therethrough,
In the rear end portion of the film unit, a fluid trap assembly for collecting excess developing fluid which is moving through the development space,
A fluid passage for initiating development of said latent image developing fluid is introduced into the developing space ruptured reservoir seen containing a first liquid-tight coupling means for coupling the reservoir to the front end of the developing space ,
A second fluid-tight coupling means the viewing including the developing fluid a fluid passageway for placement into the trap assembly, coupled to said trap assembly rear end of the developing space,
With
It said first fluid-tight coupling means, seen including a prolongation member of a first pair of first and second coupling elements and the corresponding first pair, a first coupling element of the first pair, the one at the distal end is sealably secured within the distal end of the first over-flying-layer, and the second coupling element of the first pair, at one end, of the second over-flying-layer It is fixed to the inner end so that it can be sealed ,
The opposing end of the first coupling element of the first pair, the sealed secured to one end portion of the first pair of prolongation member, opposite the second coupling element of said first pair end is sealably secured to the end portion of the hand of the first pair of prolongation member,
The second liquid-tight coupling means includes a prolongation member of the second pair of first and second coupling elements and the corresponding second pair, the first coupling element of the second pair, one end in is sealably secured to the inside end facing the longitudinal direction of the first over-flying-layer, and the second coupling elements of the second pair, the longitudinal direction of the second over-flying-layer being sealably secured to the internal ends of opposed,
The opposing end of the first coupling element of the second pair, the second pair is prolongation is one sealably secured to the distal end of the member, and, facing the second coupling element of said second pair end is sealably secured to the other end portion of said second pair of prolongation member,
Said first pair and said first and second coupling elements of the second pair comprises a fragile segment, the frangible segment, the separable der so that when torn by hand, with a perforation and lands and has Nde including a possible zone tearing perforations and lands, are disposed alternately so as to be and guides to facilitate tearing along a predetermined path and tear lines, the land, the film unit under tension and pulling have a sufficient strength to allow the said first and second fluid coupling means, so as to seal covering the tearable zone, said first and second overline grayed layer The film unit that is attached to. The spacer rail, are Bei Ete weak longitudinal edges to facilitate the propagation of the tear in the meantime, the film unit of claim 6. The perforations in each layer are spaced laterally or correctly aligned from the lateral edges to facilitate separation along the tear line, but if the film unit is a straight path The film unit according to claim 6 , wherein the film unit prevents premature separation when pulled obliquely with respect to. The first and second liquid tight coupling means are sealably secured to the opposite ends of the first and second layers, respectively, at the inner ends, and the tearable zone has the respective end portions. Located inwardly, so that the zone is sealed by the layer and any separate segment of the coupling assembly remaining on the layer is confined within the film unit 7. A film unit according to claim 6 , thereby providing a generally smooth edge. On both sides of the tear line, at least one of the two mutually facing surfaces of the fluid coupling further comprises a developer fluid activated adhesive , whereby the adhesive is along the perforations. Subsequent to the tearing, the mutually facing surfaces are arranged so that they can be sealed together, so that not only the layers of the film can be sealed but also the first 7. The film unit of claim 6 , wherein the separated ends of the second coupling member are sealable, thereby eliminating or minimizing fluid leakage. An improved self-developing film unit,
A developer fluid burstable reservoir at the front end of the film unit;
A self-developing image recording means comprising first and second overlying layers, wherein one of the overlying layers is capable of being exposed to form a photographic latent image;
Spacer means connected to and between the first and second overlying layers to provide a development space therebetween and through which developer fluid passes;
Fluid trap means for collecting excess developing fluid at the rear end of the film unit and moving through the developing space;
A first liquid-tight coupling means including a fluid passage for introducing developing fluid from the ruptured reservoir into the developing space and starting development of the latent image, and coupling the reservoir to a front end of the developing space;
A second liquid-tight coupling means including a fluid passage for introducing the developing fluid into the trapping means, and coupling a rear end of the developing space to the trapping means;
With
The first coupling means has an end portion that is sealably fixed to an outer surface of the reservoir, and an end portion that is sealably fixed within a front end portion of the image recording means, and the second coupling means includes The image recording means has an end portion that is sealably fixed in a rear end portion of the image recording means, and an end portion that is sealably fixed to the outer surface of the trap means,
The image recording means includes a photosensitive layer, and includes an image receiving layer lying on the photosensitive layer in a coextensive relationship, the image receiving layer and the photosensitive layer being an integral diffusion transfer type,
The spacer means includes a pair of substantially parallel elongated rails spaced apart, the rails being adjacent to and coextensive with opposing edges of the first and second overlying layers. ,
Each of the first and second liquid-tight coupling means is manufactured from a pair of flexible sheets, and the sheets are joined together in a sealable manner to define the fluid passages, and the combined sheets. The thickness is chosen equal to the thickness of one of the rails,
The sheet portions of the first and second coupling means located inside the front end portion and the rear end portion of the image recording means have a fluid activation adhesive layer on at least one surface facing each other. And wherein the adhesive layer is configured and sized to be on either side of the frangible portion extending across the substantial width of the sheet portion. The film unit according to claim 11, wherein the fragile portion is formed by a score line. 13. The film unit according to claim 12, wherein the photosensitive layer and the image receiving layer have fragile portions at the front and rear ends thereof, and the fragile portions are aligned with the fragile portions of the sheet. . 14. A film unit according to claim 13, wherein the frangible portions of the photosensitive layer and the image receiving layer are aligned perpendicular to the frangible portions of the sheet.

Images