JPS637764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a closed, substantially cylindrical housing within which is retractable a piston that divides the housing into two mutually sealed variable volume chambers. one variable volume chamber is in communication with a removable applicator which can be filled with a cosmetic preparation by means of the piston and has a through passage for said preparation; A cosmetic preparation can be applied to the body part to be treated in a quantity controllable manner by means of a metering valve, and a variable volume chamber facing the preparation filling chamber is provided with a connecting pipe for introducing a compressed gas, the compressed gas being A self-closing valve is disposed in a passageway which tends to move the piston in a direction of contraction of the dosage chamber and which communicates the dosage chamber with the applicator to prevent leakage of dosage when the applicator is removed. The present invention relates to an application device for cosmetic preparations, provided therein.

Cosmetics in liquid or thin paste form, in which the preparation to be applied is metered from a preparation reservoir provided in the device into a suitable applicator and can be applied by this applicator to the body part or hair part to be treated. Devices for applying preparations such as shaving foams, shampoos, hair oils or tonics as well as hair dye preparations are known in various forms (for example US Pat. No. 3,032,803;
2775251, 2603223 and German Publication Specification No. 2749074). Such devices have hitherto not been able to be employed in the application of hair dye preparations. I mean,
The preparation prepared from this dye paste and the oxidizing liquid must interact with each other only immediately before use, since otherwise the chemical reaction of the two preparation components used for hair dyeing would have already ended by the time of use. This is because they cannot be mixed, ie, filled and stored in a device. Due to the chemical reaction, the formulation hardens relatively quickly, resulting in a hard coating and possibly a blockage within the device. This characteristic of hair dye preparations requires their preparation and injection into the device immediately before use, and immediate and careful cleaning of the device after the end of the treatment process. Other known application devices of the type mentioned at the outset (German patent specification no.
No. 943904), the pressure necessary for delivery of the preparation is generated by a manual pump attached to the device in the form of elastic rubber balls in the device housing, which rubber balls are alternately pumped by the hand grasping the device housing. compressed and released again. By the same hand, the knob that operates the self-occluding valve during the course of the treatment must be pressed against the force of the spring in order to meter the outflow of the preparation into the applicator.
This dual operating function tires the user's hands and makes handling cumbersome and cumbersome. For this reason, in the case of hair dyeing in the work of a beauty salon,
It is still common practice today for the preparation components to be mixed with each other in an open dye pan and applied by brush to the hair of the person to be treated.

The invention, on the other hand, is based on the problem of improving the known application device in such a way that it can be easily and quickly prepared for the treatment process and cleaned following the treatment, reducing handling during the treatment process. ing.

Starting from an applicator device of the type mentioned at the outset, this task is achieved according to the invention by a cylindrical housing which projects into the dispensing chamber and acts directly or indirectly on the valve body of the self-closing valve. A control shaft is provided, the control shaft sealingly and movably penetrating the piston, and in an end region facing away from the self-closing valve, when the self-closing valve is opened. The solution is that the valve is connected to a relief valve for a variable volume compressed gas chamber facing the dispensing filling chamber so that the opening stroke transmitted from the valve body to the control shaft opens the relief valve. be done. In an applicator device constructed in this manner, filling of the device with the treatment preparation takes place through the self-closing valve without opening the housing when the applicator is removed. This filling is advantageously carried out by means of a pressure box or a pump, the discharge nozzle of which is pressed against the housing and the self-closing valve is immediately opened. Depending on the amount of filling that enters through the opened valve, a piston provided in the housing is pushed, and the compressed gas chamber facing the dispensing filling chamber must then be evacuated, which is controlled by a self-closing valve. guaranteed by automatic coupling via the control axis. After introduction of the preparation into the device, a source of compressed gas is connected to the compressed gas chamber, and the overpressure established in this chamber causes the preparation to be conveyed from the preparation filling chamber into an applicator reattached to the housing; From there it can be applied to the body part or hair part to be treated. For example, compressed air, which is supplied to the compressed gas chamber via a connecting pipe, can be used as the compressed gas. According to another embodiment, the compressed gas source is also constituted by a compressed gas cartridge which can be attached to a compressed gas connection or by a box which can be refilled by storage with a small preferably aerosol propellant, for example Frigen. can be done. Both compressed air and aerosol propellants are freely used in modern beauty salons and barbershops, for example as preparations foamed with compressed air are increasingly implemented.
Manual operation of the pump integrated with the device is thus eliminated.

Preferably, in the above embodiment, the end of the control shaft facing away from the automatic closing valve is sealed by a housing end wall that closes a compressed gas chamber provided with a compressed gas connection pipe, and extends through the housing end wall so as to be movable back and forth. The outer end of the housing carries a valve body of a relief valve which engages with a relief opening of the compressed gas chamber. In the case of depressing the automatic occlusion valve,
For filling the preparation filling chamber with the preparation to be applied, the valve body is forcibly pulled out of the relief opening of the compressed gas chamber via the control shaft, so that the compressed gas chamber is evacuated and the floating piston is It can move according to the amount of dosage introduced without counter pressure.

The end of the control shaft outside the housing has a
In an advantageous further embodiment of the invention, a container fillable with compressed gas is provided, from which a hollow connecting sleeve projects, which communicates with the interior of the container, the connecting sleeve being in a closed position. When the control shaft acts on the automatic closing valve, it sealingly engages with the relief opening of the compressed gas chamber to form a valve body of the relief valve.

A ring-shaped sealing element is preferably arranged at the relief opening of the compressed gas chamber, which seals tightly around the connecting sleeve of the compressed gas container when the relief valve is closed. The connecting sleeve can be fitted with play in the relief opening of the compressed gas chamber, so that when the sleeve is pulled back from the ring-shaped sealing element, a ring-shaped gap is created between the sleeve and the relief opening. arise.

The container which can be filled with compressed gas is preferably equipped on the side with an overflow valve which can be connected to a source of compressed gas.

In an advantageous further development of the invention, the container capable of being filled with compressed gas is cylindrical on its front side facing the housing and its connecting sleeve sealingly engages the connecting tube of the housing on the rear side. has an extension portion that abuts the housing end wall of the control shaft, and extends outward from the housing front end that opens when the front end of the control shaft and the piston that moves against the front end remove the front housing end wall. The end of the control shaft is held within the extension portion so as to be able to move forward and backward in the longitudinal direction by an amount that allows the control shaft to be pushed out. For cleaning a device configured in this way, the applicator and the end wall closing off the front end of the housing are simply removed from the housing, after which a piston movable against the control shaft is inserted into the compressed gas chamber. the control shaft, which is forced out of the open front end of the housing by the compressed gas present in the control shaft, which is additionally movable longitudinally by a given amount so that the entire interior of the housing is accessible for the cleaning process; A fitting to the container allows the front end of the control shaft and the piston to be withdrawn from the housing. The removed applicator and the front housing end wall can be released and cleaned without difficulty, as can the piston located at the front of the housing.

The additional movement of the control shaft by the required amount is achieved in a preferred form of the invention by attaching a transverse web to the end of the control shaft lying within the cylindrical extension, the free end of which is connected to the cylindrical extension. This is achieved by engaging a longitudinal recess of the shaped extension, the length of the longitudinal recess determining the amount of additional movement.

Advantageously, the transverse web is chosen to have a length slightly larger than the outer diameter of the cylindrical extension, and the longitudinal recess is an elongated hole passing through the wall of the cylindrical extension. The outer free end of the transverse web projects slightly beyond the wall of the cylindrical extension, such that the residual gas in the compressed gas chamber is not sufficient to completely extrude the piston together with the control shaft out of the open housing. When the control shaft can be manually engaged, the control shaft can be pushed forward by the required amount.

The piston of the device is preferably equipped with a relief valve that opens to the compressed gas chamber in the event of overpressure in the dispensing filling chamber. This relief valve prevents overpressure from building up in the dispensing filling chamber that is harmful to the device. This may occur, for example, when the device is filled to its maximum capacity, i.e. when the dispensing filling chamber has the maximum amount of dispensing and the piston is in its end position and the control shaft is in the relief opening. It is conceivable that it would be pulled back to release the . When the control shaft is pushed into the dispensing filling chamber to close the relief valve, the dispensing filling chamber is contracted by the pushed in control shaft so that the pressure increases. If the piston cannot be retracted at this time, an unacceptable overpressure will occur. However, this risk is removed by the overflow valve.

In a preferred embodiment, the piston has, on the side facing the compressed gas chamber, a projection which passes through the control shaft and is tightly attached to the control shaft by means of a ring-shaped sealing member, the piston having a projection on the side facing the compressed gas chamber. At least one substantially radially extending through-bore is provided in an area within the chamber, the through-bore extending through a gap between the control shaft and the piston or the projection. A resiliently expandable sealing ring is configured to communicate with the dispensing fill chamber and is suspended over the orifice of the throughbore. In order to ensure the position of the sealing ring aligned with the orifice of the through-bore, a ring-shaped recess is provided around the outer wall of the projection in the region of the orifice of the through-bore, in which the sealing ring is inserted. is securely held against axial movement. Preferably, O-rings made of commercially available elastic rubber materials are used as sealing rings.

The ring-shaped sealing member for sealing the preparation filling chamber against the passage of the preparation into the compressed gas chamber is preferably a ring-shaped lip-shaped sealing member arranged on the projection, the annular lip of which The control shaft contacts the control shaft in a sealed manner. A particularly simple construction results if the piston, the projection and the sealing lip are manufactured in one piece from synthetic resin.

When the application device according to the invention is used for the application of a hair dye preparation to be prepared from two preparation components to be mixed immediately before the treatment, the end of the control shaft facing the self-closing valve in the preparation filling chamber Preferably, a mixer is provided for intimate mixing of the formulation components introduced into the formulation filling chamber. The preparation components are introduced separately into the filling chamber in each required quantity through self-closing valves and prepared by the mixer into a ready-to-use hair dye preparation.

Furthermore, in order to store a sufficient volume of compressed gas even when the device is filled with a preparation, the end wall that closes the compressed gas chamber is provided with a chamber having a smaller diameter than the diameter of the cylindrical housing; Preferably, its volume is at least equal to the volume of the control shaft portion that would be within the dispensing filling chamber when the control shaft is fully pushed in and the piston is maximally retracted.
In addition to the function of compressed gas storage, this additional chamber
If necessary, it has the task of receiving the preparation that overflows from the preparation filling chamber through the overflow valve.

The applicator of the applicator has a tappet element which abuts the self-closing valve when secured to the cylindrical housing and serves to open the self-closing valve when using the applicator. . The tappet element is preferably fixedly connected to the applicator, the applicator being securable to the cylindrical housing in a position where the tappet element does not open the self-closing valve, and the applicator being securable to the cylindrical housing in a position where the tappet element does not open the self-closing valve. is fixedly arranged in the housing such that it can be moved additionally in the direction of the dispensing filling chamber by an amount that opens the self-closing valve. Metering of the preparation takes place by movement of the applicator, for which purpose the applicator may be fitted with a handle to facilitate movement. In certain cases, the opening of the self-occluding valve can also be caused by the pressure of the applicator on the body part or hair part to be treated. The operating stroke transmitted from the tapepet element to the valve body of the self-closing valve when operating the applicator causes the dispensing filling chamber to close to the dispensing component in order to ensure that the relief opening of the compressed gas chamber remains closed. It is clear that it must be smaller than when filling with. However, this can easily be guaranteed due to the corresponding stroke limits of the applicator.

In the region of the exit of the preparation from the applicator, a brush is preferably provided, with which the ejected preparation can be applied to the hair starting from the roots.

At this time, preferably, the orifice of the passage of the applicator is arranged inside the brush,
The brush application surface constituted by the free front end of the bristles of the brush is formed so as to lie within a plane extending obliquely at approximately 30 to 60 degrees with respect to the longitudinal central axis of the through-hole. There is. The slope of this coating surface is
allows a convenient position of the application surface during operation of the device, i.e. this can also be achieved by a suitably bent arrangement of the brush with the application surface extending at right angles to the through-hole; In addition to having a purpose, the orifice of the through hole can be located at a relatively small distance from the center of the application surface of the brush, and yet some of the bristles of the brush are elastic and flexible. This is accomplished by having an overhang of the required size. The path of the preparation to the application surface is short on one side, so that the preparation emerges on the application surface in the required manner, but not laterally from the brush. From the outlet area, the preparation is distributed during operation over the entire application surface, ie also over the area of the longer flexible bristles, with which the hair is applied. With suitable support of the application device and adjustment of the applicator, hair can be selectively treated with stiff, short brush bristles or with flexible, longer bristles, which are similar to brushes with bristles of the same length. This would not be possible since they would all have approximately the same stiffness.

In another preferred embodiment, the passageway is provided in a tubular projection projecting from the applicator housing and arranged concentrically inside the surrounding brush bristles, the front end of which extends in the direction of the dispensing outlet. The brush ends at the point closest to the housing on the brush application surface. There is thus no risk of the tubular projection resting directly on the hair or scalp of the person being treated.

The invention will be explained in more detail below by means of three exemplary embodiments in conjunction with the drawings.

The application device 10 according to the invention shown in FIGS. 1 to 3 has a grip part in the form of a cylindrical housing 12, the front end of which is formed as a removably screwed lid. A self-closing filling valve 16 is centrally arranged in the wall 14 and has the shape of a valve body 17 which is pressed against the sealing valve seat 15 by a spring 13 and is stored in the housing 12. When introducing the preparation to be prepared, the filling nozzle of the preparation container disengages it from its valve seat, thus opening the passage of the preparation into the interior of the housing.

A compressed gas inlet or exhaust connection 20 is provided in the rear end wall 18 of the housing 12, to which a compressed gas source 19, for example an aerosol propulsion container which can be refilled from a storage container, can be attached. .

The interior of the housing 12 is divided by a freely movable or floating piston 22 into two mutually sealed chambers, of which the chamber 24 on the valve side is used for receiving the preparation to be applied. The chamber 26 between the rear surface of the piston and the rear end wall 18 can be filled with compressed or propellant gas from a compressed gas source via the connecting tube 20, which compressed gas drives the piston 22. It attempts to move in the direction of the front end wall 14. However, the valve 16 provided with the end wall 14 prevents this as long as it is closed. A chamber 2 is formed between the front end wall 14 and the piston 22.
A mixer 28 having a large number of mixing blades inside the mixer 28
is additionally provided, and the mixer is sealed and fixed to one end of a control shaft 30 which extends through the piston 22 and the housing end wall 18 in a movable manner. When the piston 22 is moved through the valve 16 to the position shown in phantom in FIG. 30 and the reciprocating motion of the mixer 28 attached thereto, the mixture can be sufficiently mixed. Such a mixing step is necessary if the formulation to be applied consists of two or more formulation components which are introduced separately into the formulation filling chamber.

The compressed gas source is disconnected during filling of the housing 12 so that there is no counterpressure within the chamber 26. For this purpose, the piston 22 is moved in accordance with the amount of the preparation or the individual preparation components introduced during the filling of the preparation filling chamber 24, so that its position is also a measure for the amount of preparation contained in the chamber 24. . A scale 32 arranged on the housing 12, preferably made of transparent synthetic resin, and defined according to the filling volume, makes it possible to measure the amount of preparation contained in the housing, the reading of which can be taken around the piston face on the valve side. It can be done.

The piston 22 passes through the control shaft 30 on the side facing the chamber 26 and has an integrally molded lip-shaped sealing member 23.
It has a protrusion 25 that is brought into close contact with the control shaft. The chamber 24 is located between the projection and the bore of the piston on the one hand and the control shaft 30 on the other hand.
A gap 27 (see also FIG. 2) is provided in communication with the through-bore 29, unless the elastically expandable O-ring 31 suspended over the orifice of the through-bore 29 closes the through-bore 29. The gap communicates with the chamber 26 via a radial through bore 29 in the projection. Transfer of the preparation from chamber 24 to chamber 26 is therefore generally prevented. However, if the pressure in chamber 24 exceeds the value given by the initial stress in ring 31, the ring expands to allow the preparation to pass through. Conversely, the pressure of the compressed gas in chamber 26 only additionally presses ring 31 against the orifice of throughbore 29, so that passage of compressed gas from chamber 26 to chamber 24 is prevented. The radial through bore 29 and the ring 31 thus form a very simply constructed and inexpensive overflow valve.

A through passage 35 passes through the end wall 14 of the housing 12, and the main body 36 of synthetic resin is formed into a cap shape on the side facing the end wall 14, and is fixed to the rear edge of the end wall 14. applicator 3
4 is installed. The passage 35 opens at its free end in a tubular projection 38 of reduced diameter surrounded by a tuft of bristles 40 of a brush fixed to the synthetic resin body 36 . On the side facing the self-closing valve 16, the passageway 35 extends into a projecting tappet element 39, which seals the valve body 17 into a tappet connected to the valve body 17 in a predetermined fixed position. It is in contact with the valve seat 15 without being removed. However, if the applicator 34 is additionally pulled slightly in the direction of the housing 12 from the position shown in FIG. The spring 13 ensures that the applicator 34 is pushed back again. The cap portion of the synthetic resin body 36 is locked to the end wall 14 by means of two notches 37 (see FIG. 3), which allow the cap edge fitted into the rear end to be elastically expandable.
A tongue-shaped handle 41 that is diagonally separated from the housing 12 is integrally formed in the cap portion located between the notches 37, and the handle is used to secure the applicator to the housing 12. and serves as an operating handle to facilitate removal and on the other hand to control the opening of the valve 16. For this purpose, the operator operating the device can pull the handle 41 backwards with his fingers or the thumb of the hand gripping the device so that it abuts the housing and engages the rear edge of the front screwed lid. The protrusion moves the applicator 34 in the valve opening direction.

The first step is to section and lift the hair to be treated.
A comb element 42 is provided, as shown attached to the housing 12 in dashed lines in the figure.

The compressed gas source 19 is in the form of an aerosol container which can be filled via an overflow valve 43 as shown in FIGS. 1, 4 and 5, and a control shaft 30 is fixed to the outer end thereof. ing. From container 19,
A laterally mounted overflow pipe projects towards the housing 12 and ends in a connecting sleeve 44 which can be introduced into the connecting pipe 20 which communicates with the compressed gas chamber 26 . The connecting pipe 2
A sealing ring 45 in the shape of an O-ring inserted into the
is in close contact with the periphery of the connecting sleeve 44 at the position where it is completely pushed into the opening 20 (see FIG. 4), so that the liquid excess charge in the container 19 is contained in the compressed gas chamber 26. may overflow. There, the frigen is vaporized and a pressure corresponding to its vapor pressure is formed, and this pressure acts on the preparation contained in the preparation filling chamber 24 through a piston that can move back and forth, and when the automatic closing valve opens, the applicator Kick it out within 34.

On the other hand, when the connecting sleeve 44 is pulled back from the opening 20 by a relatively small distance a as shown in FIG. 5 from the fully pushed-in position (see FIG. 4), the sealing ring It no longer abuts the periphery of the connecting sleeve and the compressed gas chamber 26 and/or
Alternatively, the compressed gas contained within the container 19 escapes and its pressure drops to ambient pressure.

During the introduction of the pharmaceutical ingredients into the pharmaceutical filling chamber 24 by means of the self-closing filling valve 16, there must be no counterpressure in the compressed gas chamber 26, i.e. the compressed gas chamber is evacuated, i.e. removed from the container 19. There must be. This means - as shown in Figure 5 - that when the valve body 17 of the filling valve 16 is removed from its valve seat by a stroke a, this stroke
This is carried out automatically since it is transmitted to the connecting sleeve 44 via the control shaft 30 and the container 19. The connecting sleeve 44 on the one hand constitutes the valve body of a relief valve for the compressed gas chamber 26, which is activated automatically upon introduction of the pharmaceutical ingredients into the pharmaceutical filling chamber 24.
On the other hand, it must of course be ensured that the above-mentioned automatic evacuation cannot take place during use of the application device. In the case of the embodiment described above, this is the actuation stroke b (see FIG. 1) that can be exerted by the applicator 34 on the valve body 17 of the filling valve 16.
is guaranteed by being limited to an amount smaller than the stroke a.

If the dispensing components introduced into the dispensing filling chamber 24 are to be thoroughly mixed inside the dispensing chamber 24 by the reciprocating motion of the control shaft 30 and the mixer 28 as described above, the entire container 19 is connected to the connecting sleeve 44. After the compressed gas is introduced and extracted from the exhaust opening 20, the connecting sleeve is rotated to set play between the opening 20 and the outside, and the control shaft can be pushed in until it comes into contact with the valve body 17 of the mixer 28. This is possible without any hindrance by the connecting sleeve 44. The container 19 constituting the source of compressed gas serves as a handle for operating the control shaft.

The embodiment of coating apparatus 10' shown in FIGS. 6-8 has substantially the same construction as coating apparatus 10 described above. Since in the drawings the same parts of both devices are provided with the same reference numerals, it is sufficient to refer to the above description for the corresponding construction, which essentially indicates the connection to the aerosol container 19 which serves as a source of compressed gas. Only changes and additions relating to the type and manner of attachment of control shaft 30 will be described below. A cylindrical extension 46 from the bottom of the container 19
The extension rests against the housing end wall 18 when the connecting sleeve 44 is completely pushed into the connecting pipe 20, ie when compressed gas can pass from the compressed gas source 19 into the compressed gas chamber 26. . Attached to the end of the control shaft 30 projecting into the interior of the cylindrical extension 46 is a transverse web 48 at right angles to the control shaft, the free ends of which are connected to the cylindrical extension 46. The control shaft 30 is fitted into a long hole 49 extending parallel to the control shaft provided in the cylindrical extension portion 46 and the compressed gas source 19 in the longitudinal direction c (seventh (see figure). In FIG. 7, compressed gas source 1
9, the horizontal web 48 of the control shaft 30 is connected to the elongated hole 49 in a position where it is airtightly connected to the housing 12.
The length of the control shaft 30 is selected such that the mixer 28 disposed at the inner end of the housing of the control shaft 30 at the end remote from the housing abuts the self-closing valve. I know that there is.
Thus, when operating the self-closing valve 16 - for example by introducing a filling nozzle of a dispensing storage container to fill the dispensing filling chamber 24 - the operating stroke applied to the valve body 17 is transmitted via the control shaft 30. A compressed gas source 19 is communicated to the compressed gas source 19 such that the compressed gas chamber 26 is vented to the surrounding atmosphere, i.e., the compressed gas chamber 26 is automatically evacuated upon filling of the dispensing filling chamber 24. On the one hand, it is ensured that the connecting sleeve 44 can be pulled out of the connecting tube 20 of the housing.

On the other hand, after removing the front end wall 14 from the housing, the control shaft 30 can move forward and backward by a distance c until the end of the horizontal web 48 abuts the end of the elongated hole 49 on the housing side. gas chamber 2
The pressure present in the mixer 28 causes the piston 22, which rests against the mixer 28, to protrude from the housing 12, making it susceptible to a simple cleaning process, which at the same time also releases the interior of the housing, as shown in FIG. As can be clearly seen, in some cases adhering preparation residues can be removed.

After cleaning, the piston 22 and mixer 28 are retracted into the housing by retraction of the control shaft 30, and the cleaned end wall 14 is reattached to the housing 12 as before. And the main coating device 1
0 is again prepared for new use.

The additional travel distance c of the control shaft obtained by holding the control shaft longitudinally retractable within a limited range to the compressed gas source allows the application apparatus to be easily disassembled without the need for complete disassembly of the application apparatus. makes complete cleaning possible.

9 and 10, an applicator designated 110 is shown which is advantageously constructed compared to applicator 34. In FIGS. The applicator 110 consists of an applicator housing 112 having a cap-like portion 114 at one end (the end on the left in FIG. 9), which allows the applicator to be used as a coating device. It can be attached to 10 or 10'. The cap-like portion 114 is integrally molded with a tongue-like handle 116 on each of its opposite sides.
This handle serves to operate the self-occluding valve of the applicator.

A brush-like brush 118 is disposed on the applicator 110 at its end facing the cap-like portion 114 (i.e. on the right side in FIG. 9), by means of which a brush-like brush 118 can be dispensed meterably from the applicator. The preparation can be applied to the body part to be treated, for example the hair. The brush application surface 120 formed by the free front end of the bristles of the brush 118 - unlike the ends of the bristles of the applicator 34 described above - is clearly seen in the side view shown in FIG. in a plane extending at an angle of about 45 degrees or less with respect to the longitudinal central axis of the applicator.

The supply of the preparation to the brush 118 is provided by the housing 11
A through passage 1 provided concentrically with the longitudinal central axis of 2.
22, which opens at its housing end into a truncated conical connection 124, which is formed by a complementary truncated conical connection 124 in the connecting pipe of the application device 10 or 10'. Engages with the recess.
A ring-shaped sealing member 126 made of an elastically compressible material is provided in the cap-shaped part 1, although the preparation emerging from the applicator can only pass into said passageway 122.
It is guaranteed that no one can go inside 14.

A through passage 122 extending along the central longitudinal axis of the housing 112 is inserted into the inner center of the bristles of the brush 118 surrounding it within a tubular projection 128 whose end facing away from the application device projects from the housing 112. The length of the tubular projection 128 is d from the point where its orifice is closest to the housing of the brush application surface 120 when looking in the direction of the dispensing outlet.
It is selected so that it ends just in front of you. The bristles of the brush 118 are embedded in an annular brush body 130 which is fitted into an annular recess in the applicator housing 112 coaxially surrounding the tubular projection 128, where it can be, for example, notched or bonded. Fixed by

The housing 112 of the applicator 110, like the brush body 130, is manufactured from synthetic resin by injection molding.

[Brief explanation of the drawing]

1 is a central longitudinal sectional view of a first embodiment of an application device constructed according to the invention for the preparation and application of hair dye preparations; FIG. 2 is a view taken in the direction of arrow 2--2 in FIG. FIG. 3 is a partial plan view of the coating device as seen in the direction of arrow 3 in FIG. 1, FIG. 4 is a sectional view of the rear portion of the coating device similar to FIG. 1, and FIG. a diagram showing the applicator device with its active applicator removed when filling with the preparation to be applied;
FIG. 6 is a central longitudinal sectional view of a second embodiment of the application device according to the invention for preparing and applying a hair dye preparation, FIG. 7 in its operating state before the filling process with the preparation to be applied. The applicator device of FIG. 6 with the applicator removed is shown in section only in its front part, and FIG. 8 shows the application device of FIG. 6 and FIG. FIG. 9 shows the application device with the applicator and the front end wall removed in a position rotated about its central longitudinal axis by 90 degrees, FIG. Side view of the brush-like applicator, FIG. 10 is indicated by arrow 10-10 in FIG.
FIG. 10, 10'... Coating device, 12... Housing,
13... Spring, 14, 18... End wall, 15... Sealing valve seat, 16... Automatic closing valve, 17... Valve body, 19... Compressed gas source, 20... Connecting pipe, 22... Piston, 23...
lip-shaped sealing member, 24, 26... chamber, 25... protrusion,
27...Gap, 28...Mixer, 29...Through bore, 3
0...Control axis, 31...O ring, 32...Scale, 3
4,110...Applicator, 35,122...Through passage, 36...Synthetic resin body, 37...Notch, 38,
128... Tubular protrusion, 39... Tappet element, 40
...hair bundle, 41,116...handle, 42...comb tooth element,
43...Overflow valve, 44...Connection sleeve, 45...Sealing ring, 46...Extension portion, 48...Horizontal web, 4
9... Long hole, 112... Applicator housing, 1
14... Cap-shaped part, 118... Brush, 120
...Brush application surface, 124...Connection part, 126...Ring-shaped sealing member, 130...Brush main body.

Claims (1)

[Claims] 1. A device comprising a closed substantially cylindrical housing, in which a piston is movably arranged to divide the housing into two mutually sealed variable volume chambers. and one variable volume chamber can be filled with a cosmetic preparation by the piston and communicates with a removable applicator provided with a through passage for the preparation, and the cosmetic preparation can be filled through the applicator. can be applied to the body part to be treated in a quantity controllable manner by means of a metering valve, and a variable volume chamber facing the dispensing filling chamber is provided with a connecting pipe for introducing compressed gas, which compressed gas moves the piston into the body part to be treated. A self-closing valve is disposed in a passageway for moving the dispensing fill chamber in a direction of contraction and communicating the dispensing fill chamber with the applicator to prevent leakage of the dispensing compound when the applicator is removed. In the applicator for cosmetic preparation, a preparation filling chamber 24 is provided in the cylindrical housing 12.
A control shaft 30 is provided which projects inward and acts directly or indirectly on the valve body 17 of the automatic closing valve 16, and the control shaft seals the piston and penetrates the piston so that it can move forward and backward. In its end region facing away from the automatic closing valve 16, the maximum opening stroke a transmitted from its valve body 17 to the control shaft 30 when opening the automatic closing valve 16 causes the relief valves 20, 44, 45 to Application device for cosmetic preparations, characterized in that it is connected to a relief valve 20; 44; 45 for a variable volume compressed gas chamber 26 facing the preparation filling chamber so as to open it. . 2 The end of the control shaft 30 facing away from the automatic closing valve 16 connects to the compressed gas chamber 2 equipped with a compressed gas connection pipe.
The housing 1 is sealed by a housing end wall 18 that closes the housing 1 and extends through the housing end wall 18 so that the housing 1
a relief valve 20, 44, 45 which engages the relief opening 20 of the compressed gas chamber 26 at its outer end of 2;
The coating device according to claim 1, characterized in that the valve body (connection sleeve 44) is supported. 3. At the end of the control shaft 30 outside the housing 12, a container 19 fillable with compressed gas is provided, from which a hollow connecting sleeve 44 projects, which communicates with the interior of the container. The connecting sleeve 44 sealingly engages the relief opening 20 of the compressed gas chamber 26 and closes the relief valve 2 when the control shaft 30 acts on the closed self-occluding valve 16.
3. The coating device according to claim 2, wherein the coating device comprises valve bodies of 0, 44, and 45. 4. A sealing ring 46 is arranged in the relief opening 20 of the compressed gas chamber 26, which sealing ring fits tightly around the connecting sleeve 44 of the compressed gas container 19 when the relief valves 20, 44, 45 are closed. 4. The coating device according to claim 3, wherein the coating device is configured such that: 5. Application device according to claim 3 or 4, characterized in that the container 19, which can be filled with compressed gas, is equipped with an overflow valve 43 connectable to a source of compressed gas. 6 the rear housing end wall 18 when the compressed gas-fillable container 19 is cylindrical on its front side facing the housing 12 and its connecting sleeve 44 sealingly engages the connecting tube 20 of the housing 12;
the front end of the control shaft 30 and the piston 22 that moves against the front end of the control shaft 30 and the piston 22 that extends outward from the open housing front surface when the front housing end wall 14 is removed. According to any one of claims 3 to 5, the end of the control shaft 30 is held within the extension portion so as to be able to move forward and backward in the longitudinal direction by a step c such that the control shaft 30 can be pushed out. coating equipment. 7 the control shaft 30 within the cylindrical extension 46;
A transverse web 48 is attached to the end of the cylindrical extension part 46, the free end of which fits into the longitudinal recess (elongated hole 49) of the cylindrical extension part 46. The coating device according to scope 6. 8. The transverse web 48 has a length slightly larger than the outer diameter of the cylindrical extension 46, and the longitudinal recess passes through the wall of the cylindrical extension, and the control shaft Claim 7 characterized in that it is an elongated hole 49 extending parallel to 30.
The coating device described in . 9. According to any one of claims 1 to 7, characterized in that the piston 22 is equipped with a relief valve 29, 31 that opens to the compressed gas chamber 26 in the case of an overpressure in the dispensing filling chamber 24. The coating device described. 10 The piston 22 passes through the control shaft 30 on the side facing the compressed gas chamber 26 and the ring-shaped sealing member 2
3 has a projection 25 in close contact with the control shaft 30, the region of which lies in the compressed gas chamber 26 is provided with at least one substantially radially extending through bore 29; The through-bore communicates with the dispensing filling chamber 24 via a gap 27 between the control shaft 30 and the piston 22 or the projection 25, and the through-bore communicates with the dispensing filling chamber 24 on the orifice of the through-bore 29. Claim 9 characterized in that the elastically expandable sealing ring 31 is stretched.
The coating device described in . 11. Claim 10, characterized in that in the region of the orifice of the through-bore 29, the outer wall of the projection 25 is provided with a ring-shaped recess, in which a sealing ring 31 is held. The coating device described in . 12 O where the sealing ring 31 is made of elastic rubber material
The coating device according to claim 10 or 11, which is a ring. 13 A ring-shaped sealing member for sealing the preparation filling chamber 24 against the passage of the preparation to the compressed gas chamber 26 is a ring-shaped lip-like sealing member 23 disposed on the projection 25, the annular lip of which The piece is characterized in that the piece abuts the control shaft 30 in a sealed manner,
A coating device according to any one of claims 10 to 12. 14. Claims 10 to 13, characterized in that the piston 22, the protrusion 25, and the lip-like sealing member 23 are integrally injection molded from synthetic resin.
The coating device according to any one of. 15 a mixer 28 for intimate mixing of the pharmaceutical ingredients introduced into the pharmaceutical filling chamber 24 at the end of the control shaft 30 facing the self-closing valve 16;
The coating device according to any one of claims 1 to 14, characterized in that the coating device is provided with:. 16 A chamber 47 having a smaller diameter than the diameter of the cylindrical housing 12 is formed in the end wall 18 that closes the compressed gas chamber 26, and the volume thereof is such that the control shaft 30 is completely pushed in and the piston 22 is Claims 1 to 15 are characterized in that the volume is at least equal to the volume of the portion of the control shaft 30 that is within the dispensing filling chamber 24 when it is pulled back to the maximum extent. coating equipment. 17 When the applicator 34, 110 is fixed to the cylindrical housing 12, the automatic closing valve 16
Claims 1 to 16 characterized in that it has a tappet element 39, 124 abutting the
The coating device according to any one of. 18 The tappet element 39, 124 is fixedly connected to the applicator 34, 110, and the applicator 34, 110
9, 124 is capable of being fixed to the cylindrical housing 12 in a position that does not open the self-occluding valve 16;
The applicator 34, 110 is the relief valve 20,
44, 45, the amount b of opening the automatic closing valve 16 is smaller than the opening stroke a necessary for opening the valves 44 and 45.
18. Applicator device according to claim 17, characterized in that it is fixedly arranged on the housing 12 in such a way that it is additionally movable in the direction of the dispensing filling chamber 24. 19. A brush 40, 11 is attached to the applicator in the area of the outlet of the dispensing from the applicator 34, 110.
19. The coating device according to any one of claims 1 to 18, characterized in that: 8 is disposed. 20 The orifice of the through passage 122 of the applicator 110 is disposed inside the brush 118, and the brush application surface 120 constituted by the free front end of the bristles of the brush 118 is aligned with the longitudinal central axis of the through passage 122. 20. The coating device according to claim 19, wherein the coating device is located in a plane extending obliquely at an angle of about 30 to 60 degrees with respect to the coating device. 21 The through passage 122 is the applicator housing 1
12 and is provided in a tubular projection 128 disposed concentrically inside the bristles of the brush projecting from and surrounding it, the front end of which extends into the housing of said brush application surface 120 when viewed in the direction of the dispensing outlet. 21. Applicator according to claim 20, characterized in that it ends before the nearest point.