JPS6225346B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates in particular to the manufacture of ventilated cigarettes by assembling cigarettes with perforated binding paper and filters. However, the invention can also be used to punch holes in other web materials and is extendable to cutting bonded paper or other web materials with pins.

According to one aspect of the invention, an apparatus for perforating a moving web of paper, particularly a bonded sheet for use in a filter attaching machine, cooperates with a support roller arranged to support the paper during perforation of the paper. and a roller for mounting a pin for punching holes in the paper, the support roller being driven so as to make its circumferential speed equal to that of the punching roller to form a recess corresponding to the position of the pin. The deformable material having a deformable surface and forming the surface of the support rollers is configured such that the recesses are pinned during initial operation of these rollers.

The recess of the support roller therefore corresponds exactly to the position of the pin.

The deformable surface of the support roller may be of thermoplastic material and may be initially heated to facilitate deformation by the pins to form the recesses;
Alternatively, the pin may be heated. However, in a preferred construction, the support roller has a thin metal portion forming its outer circumferential surface in an area aligned with the pin, through which the pin is able to pass when the roller is initially rotated. Similar principles are applicable to the cutting of paper webs, such as chip papers or resin web materials, such as polypropylene, used for wrapping cigarette packets and other articles, and for this purpose. , each cut involves the formation of a row of closely spaced holes across the web material, thus significantly weakening the web, and sending the portion of the web to be cut away from the cutting station at a velocity greater than the velocity of the web. This can be achieved by

In the case of a filter applicator used in the manufacture of vented cigarettes, according to a second aspect of the invention, preferably a perforating roller having groups of pins at circumferentially spaced locations around the roller is provided. and the roller is positioned to transversely cut the binding paper such that the gaps between the pin-pierced areas create individual pieces that are wrapped around the corresponding cigarette and filter assembly. The timing is adjusted to match. The mounting machine preferably includes:
A device is provided for applying adhesive to the bonding paper except over the areas to be perforated by the pins. Drilling with pins in this manner is preferred over other possible embodiments, according to which spaced sets of holes are drilled into the bonding paper with an electric drilling device, such as a spark drilling device. made or laser,
Electron beams or other radiant energy devices may be used, in which case the energization of the perforation device can be controlled by electrical signals derived from the filter mounting drive mechanism.

Embodiments of the device of the invention are described below by way of example with reference to the accompanying drawings, in which: FIG.

FIG. 1 shows a web 2 of bonded paper that is twice the width required to assemble one cigarette, so that a "double length" cigarette can be assembled from said web in a known manner. It is possible. The locations where cuts are made to separate the individual parts of the web are indicated by dashed lines 4. As the web is fed into the filter applicator, it first passes under a roller 6 (FIG. 2) which has a group of perforating pins 8 arranged so as to form perforated areas 10 in the paper.

A support roller 7 of the same diameter as the roller 6 is arranged below the path of the web and has a recess 9 corresponding to the pin 8.
area is formed. To facilitate the formation of these recesses, the surface of the roller 7 may be made of thermoplastic material, while the pins are made of steel.
The recesses can therefore first be formed by heating the surface of the roller 7 (or pin) and rotating the two rollers 6, 7 together. The rollers 6, 7 are driven at the same speed by an input shaft 13 through gears 11, 12, e.g. in response to successive measurements of the resulting aeration level of the finished cigarette. The spacing between these axes may be arranged to be slightly adjustable so as to vary the depth of penetration and thus the size of the hole. This adjustment is facilitated by making the material of the surface of the roller 7 thermoplastic and slightly elastic.

Each area of holes provides an area of ventilation for an individual cigarette assembly, and the rollers 6, 7 are coupled to a downstream cutting device (not shown) so that the holes are formed in the correct locations. Another roller 112 applies a layer of adhesive 14 to the web before it is cut except over the perforated areas and is preferably associated with the cutting device.

On the one hand, the cigarette rods of predetermined length and the filter tips are fed to the assembly device by a suitable feeding device, not shown, so as to be assembled by successive sections of binding paper in any known manner.

FIG. 3 shows the pin roller 16 and the support roller 17.
1 shows a different drilling device having a In this example, the support roller is formed with a pre-drilled radial passage 18 in the area in which the pin 19 of the roller 16 is arranged to enter. Around the support roller 17 is a thin metal sleeve 20 that covers the passageway 18. When the roller is first operated, the pin 19 is in the hole 2.
1 through the sleeve 20.

As in the previous example, rollers 16, 17 are driven to have the same circumferential speed. The rollers 16, 17
preferably have the same diameter, so that each pin enters the hole formed by the same pin on each rotation of the roller. However, in different embodiments the roller 16 may be, for example, 1/2 the diameter of the roller 17.
or 1/3, in which case each pin is
When the device is first operated, two or three holes are formed in the sleeve 20 during continued rotation of the roller 16.

Pins 19 may form circumferentially spaced sets around roller 16 as described with respect to FIG. Alternatively, pins 19 may be provided at regular intervals around the roller 16,
In this case, the roller 17 is likewise formed with a passage 18 all around its periphery.

Note that each pin 19 is not radially oriented with respect to the roller 16 but is inclined slightly rearward, that is, along the tangential line 23.
and the radial line 24 is less than 90°. This serves, among other things, to ensure that the pins exit cleanly from the paper web (not shown in FIG. 3) without any tendency to pull the web away from the rollers 17.

Any dust or other debris created by the action of the pins during the penetration of the paper web is sucked in and removed by suction through the channel 25 of the member 26 in the roller 17. Channel 25 may extend further circumferentially than shown in FIG. 3, if desired.

There may be two or more circumferentially extending rows of pins 19 on rollers 16 and a similar number of circumferentially extending rows of radial passages 18 on rollers 17. In another embodiment, the passage 1 of the roller 17
Each circumferentially extending row of 8 can be replaced with a circumferentially extending groove. The example is similar to the roller 1 of FIG. 3 except that the rows of radial passages are replaced by circumferentially extending grooves 28 (there are five in this example).
4, which is a longitudinal cross-sectional view of a roller 27 similar to 7. As in FIG. 3, roller 27 is surrounded by a thin metal sleeve 29, which is shown in FIG. 4 prior to being pierced with a pin such as pin 19 of FIG. There are also radial passages 30 extending from the grooves 28 at regular intervals relative to the suction chamber 31 to remove any debris.

As a concept of scale, pin 19 shown in FIG.
The diameter of the radial passage 18 is, for example, 0.62 mm.
But that's fine. The thickness of the sleeve 20 may be, for example, about 0.1 mm or somewhat thicker (eg, up to 0.4 mm) depending on the material.

It is believed that the material of the sleeve 20 should be as hard as possible without contradicting the need to drill the sleeve with a pin. Hard stainless steel is available. The stainless steel is obtained in sheet form and can be wrapped tightly around the roller 17 and fixed with adhesive, for example. Another possibility is for a web of stainless steel or other suitable sleeve material to be wrapped helically around the roller 17.

Another possibility, which is preferred, is for the sleeve 20 to be formed as a spacer part by a method involving electro-deposition of nickel. The sleeve thus formed is fitted tightly around the roller 17 and placed in position around the roller 17 after first freezing the roller.

The holes 21 formed in the sleeve 20 shown in FIG. 3 are shown with clean edges, such as can be produced by a stamping operation. In fact, depending on the hardness of the sleeve material, the edges may actually be deformed inwardly without any material being removed. However, it has been found that with hard materials, clean (non-bell shaped) holes can be formed with suitably hard beveled pins as shown in FIG.

However, the clean edge holes of sleeve 20 would allow material to be removed from the paper web in some types of punching operations. Another example obtained experimentally is that the paper is folded inwardly through the hole 21 of the sleeve, at least to some extent, leaving a rough edge on its inner surface. This rough edge can then be removed by passing the paper around rollers driven at a slightly different speed than the paper so as to shatter or scrape the inwardly deformed paper, or at least some of it. It is. Another roller may be arranged to press the paper against the crushing or scraping roller.

5 and 6 show the overall arrangement of a punching device having a pin roller 32 and a support roller 33. FIG. These rollers are rollers 16 and 1 in FIG.
It may be the same as 7. The web 34 to be perforated is
Those arms which are first pressed against the roller 33 by the roller 35 which passes around the roller 33 and is rotatably mounted on a spindle 36 supported by arms 37, 38, are attached to the fixed member 52 by the pin 51.
It is pivotally connected to the member 50 which is pivotally connected by a pin 39.
A compression spring 53 between members 50, 52 acts to rotate member 50 about pin 51 so as to engage abutment 54 of screw 55. Therefore, screw 5
5 rotation allows a slight angular adjustment of the axis of the roller 35. This is useful to ensure accurate guidance of the paper web 34 relative to the rollers 33. The roller 35 is attached to the posts 57 of the arms 37 and 38.
and a frame member 58 .
It is urged toward the roller 33.

An additional pressure roller (possibly adjusted like roller 35) is installed on the opposite side of roller 33 to ensure that web 34 passes properly around roller 33, i.e., is not pulled apart by the pins of roller 32. possible) may be provided.

FIG. 7 shows web portions 5 spaced apart from drum 60.
9A is shown, showing an apparatus for cutting a web 59 that moves to create a flow of 9A. The device may be essentially as described in German Patent Application No. 2755648 or US Pat. No. 4,184,619.

The web 59 is fed transversely to the drum at a speed slower than the circumferential speed of the drum 60, and each cut, which is gripped by suction applied through a port 61 in the drum, is received in an axially extending groove in a roller 64. This is done with a row of closely spaced pins 62 attached to a body 63. At a corresponding location of the rollers 60 each has a bore 66 extending axially close to its outer periphery leaving an outer wall 67 thin enough to be penetrated by the pin 62 when the device is first operated. There is an axially extending groove that accommodates the insert 65. Accordingly, a row of closely spaced holes are formed in wall 67 to accommodate pins 62. The holes formed by the pins may be closely spaced together to form an essentially continuous slit.

Pin 62 not only perforates the web, but also assists in pulling each web section to be cut away from the continuous web, which web section, as a result of its slightly slower speed, Slightly slips along the surface. Thus, spaced apart web portions 59A are formed on rollers 60.

During manufacture of roller 60, bore 66 is drilled before insert 65 is secured to the roller.
The rollers are then machined to the required diameter, and the machining operation reduces the thickness of the wall 67 of each insert to the required value.

Any of the punching devices described above can be used to punch different web materials. For example, webs of resinous material used to make surgical bandages may be perforated in this manner so as to be breathable.

In addition, the passage 18 (Fig. 3) and the groove 28 (Fig. 4)
The diameter or width of the hole is not much larger than the hole made by the pin. In practice, the unsupported area of the sleeve (i.e. the area above the passage or groove) allows the pin to enter the passage or groove, but neither need be positioned very precisely relative to the other. as small as possible without contradicting the need to ensure that

In Figures 3, 4 or 5, the pin, paper and sleeve all have the same speed.
In another embodiment, the same angular velocity is maintained for both rollers, but the pins are applied to the paper and the sleeve so that they exert a slight tearing action on the paper, thus causing a small inwardly bending flap in the paper. may also be arranged so that they move at slightly faster or slower speeds (because they are located at slightly different diameters);
These flaps are later crushed or scraped off as described above. Another possibility is that the paper may be fed at a speed slightly different from that of the sleeve, and the part of the paper that is folded into the hole of the sleeve with the pin may be bent by the edge of the hole or The paper is at least partially removed by a slight rubbing action of the sleeve on the paper, and for this purpose the paper is preferably bent over a considerable arc (such as that shown in FIG. 5).
must pass around the support rollers along
In this case, the speed of the paper is determined by a separate feed roller (not shown) downstream of the punching device and may be equal to the speed of the pin, so as to create a small convoluted flap as described above. May be slightly different.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a web of "cork" bonded paper perforated according to the present invention, FIG. 2 is a diagram of an apparatus for manufacturing the same bonded paper, and FIG. 3 is a diagram of the perforating rollers of a different apparatus. 4 is a partial longitudinal sectional view of the modified support roller; FIG. 5 is an overall view of the complete drilling device with adjustable pressure roller; Figure 6 is the 5th
The view from the left of the figure, FIG. 7, shows a sectional view of the two rollers forming the web cutting device. 2,59...Paper web, 6...Pin roller, 7,17,27...Support roller, 8,19,
62...pin, 9...recess, 10...hole area,
18... Passage, 20, 29... Metal sleeve, 2
DESCRIPTION OF SYMBOLS 1... Hole of sleeve, 28... Groove, 35... Pressure roller, 59A... Web portion, 60... Drum, 64... Cutting roller, 65... Insert, 67... Outer wall, 112... ...Adhesive roller.

Claims (1)

[Claims] 1. A filter attachment machine comprising a device for perforating a movable web of binding paper used to connect cigarettes to a filter, cooperating with support rollers arranged to support the paper as it is perforated. the support roller is driven such that the circumferential speed of the support roller is equal to the circumferential speed of the hole-forming roller, and the support roller is driven to the position of the pin. a deformable surface formed with corresponding recesses, the deformable material forming the surface of said supporting rollers being such that said recesses are formed by said pins during the first operation of said rollers; A filter mounting machine characterized in that the material is formed of such a material.