DE1063052B - Disc-shaped sealing insert for capsule closures and device and method for producing the same - Google Patents

Description

GERMAN

kl. 64 a 43/01

INTERNAT. KL. B 67 b

PATENT OFFICE

S 43599 III / 64 a

REGISTRATION DATE: APRIL 20, 1955

NOTICE THE REGISTRATION AND ISSUE OF THE EDITORIAL:

AUGUST 6, 1959

The invention relates to a disk-shaped sealing insert made of plastic material which is flat on both sides For metallic caps with flat inner walls for closing bottles and flacons or other similar vessels that have an external bead or flange for retention the capsule are equipped after they have been pressed on. The invention is also concerned with devices and methods of manufacturing and inserting the sealing inserts into the capsules.

The insertion of sealing inserts in capsules is usually done by machines whose Inlays piled up receiving manifold every time an inverted capsule is attached to this provided place near the machine, laterally ejects an insert that is pushed by a plunger is pushed into the capsule. So far it has been very difficult to guarantee that among those with There weren't a few capsules with sealing inserts, the inserts of which had fallen out again. That is why it happened frequently, especially since the work cycle sequence was 15 to 20,000 bottles to be closed per hour can be that a defective capsule, i. H. a capsule whose inner gasket has fallen out was, caused the breakage of several consecutive bottles and the standstill of the machine.

In order to counter this deficiency, one has already proposed or a large number of contrivances applied, so z. B. coated the inside of the capsule with adhesive paint or a drop of paint in the bottom of the capsule just before the insertion of the inserts or internal protrusions in the capsule that the inserts should clamp elastically, attached.

However, even these methods could not always be satisfactory. It happens that because of one insufficient amount of varnish or because of the changing moisture content of the air the deposits detach. It also happened that in certain cases it was not enough to hit the discs to ensure clamping in or under the retaining projections.

The purpose of the invention is to hold a sealing insert made of plastic material in a closure capsule with flat, smooth inner walls without any projections, threads or the like simpler and more effective way than before through appropriate training and shaping of the To ensure insert itself, without having to firmly connect the insert and capsule to one Adhesive or to other holding organs, e.g. B. od inner projections. Like., Must grip.

For this purpose, the sealing washer according to the invention, the outer diameter of which is slightly larger than the Inner diameter of the capsule is a simple or disk-shaped sealing insert

for capsule closures

as well as devices and methods

to manufacture the same

Applicant:

Societe du Bouchon Couronne

(Crown Cork Company France),
Viry-Chatillon, Seine-et-Oise (France)

Representative: Dipl.-Ing. C-H. Huss, patent attorney,

Garmisch-Partenkirchen, Rathausstr. 14th

Claimed priority:
France of April 23, 1954 and February 21, 1955

Antoine Leenaards, Emile Jarre and Henri Ridiet,

Viry-Chatillon, Seine-et-Oise (France),

have been named as inventors

double, extending over the entire circumference Bevel on, so that a thin, flexible edge is created, which is after compression in the capsule slightly bent inside and the insert wedged or jammed in the capsule.

The drawings show an embodiment of an insert according to the invention and are shown schematically Devices for making the same. It shows:

1 shows a section through a capsule provided with a sealing insert made of plastic material, FIG. 1a shows an insert with a double inclined surface,
Fig. Ib an insert with a simple inclined surface,
2 shows a device for producing the sealing inserts by rolling,

3 shows a further embodiment of a device for producing the sealing washers,

4 shows the production of sealing inserts from rod material.

The insert α according to FIGS. 1 and 1 a is formed by a flat disk made of plastic material which, with the exception of the edge, has a uniform thickness. The edge has a double bevel O ₁ , a ₂ , the common ring edge a _{s of which has} a diameter that is slightly larger than the inner one

909 580/136

Diameter of the capsule b is. Good results in terms of proper wedging of the insert in the capsule are achieved if the bevel has a radial length equal to the size of the thickness of the insert next to the bevel.

As can be seen from Fig. 1, after being pressed into the capsule b , the insert α is bent with its annular edge a _s downward to form a conformable surface a ₄ , which rests elastically against the cylindrical flat wall of the capsule. Experience shows that such a wedged and, because of its lightness, tightly fitting insert does not normally fall out of the capsule. The subsequent closing process can therefore take place without any disruption. In a simple, cheap and effective way, the problem of holding the insert, once it has been introduced into the capsule, is solved in the course of the subsequent process steps.

If the inlays are produced by rolling (Fig. 2), a strip-shaped material 1 is assumed, which after passing between a pair of rollers 2, 3, optionally heated in a heating device 4, is passed by means of a conveyor belt 7 between a pair of forming rollers 5, 6 . The forming rollers have embossments with essentially the same bevels and other design features and rotate at the same peripheral speed. The surface of the inlays can be given a pattern, brand or other distinguishing feature at the same time.

The distance between the two rollers 5, 6 is such chosen that the pre-embossed sealing inserts remain connected by thin webs 8 and through a second conveyor belt 9 is fed to a separating device 10 for the final separation from one another can be. However, the cutting can also be carried out above the closures or capsules and the inserts can be inserted into them under the action of a piston.

Of course, instead of using embossing rollers, the tape can also be placed between two plates which are provided with symmetrical embossing and an alternating one at the same time Move apart and towards each other.

If you are working with a device according to FIG. 3, the inclined surface is represented by a corresponding grinded, rotating mold 12 received.

The tools work in such a way that the inserts 13 are not completely separated from the main belt, but a simple skin or a web 14 remains around the ring edge of the inclined surface. Another Processing station 15, 15 ', made up of two in unison moving plates consisting, which is mounted in front of or behind the mold 12, allowed on the Insoles with or without the application of heat, pressure or both means together, brands, patterns or the like to be attached.

According to a further feature of the invention, the deposits are separated from the band holding them together and placed in the sealing capsules with the aid of a piston 16, which, however, results in those deposits that are imperfectly provided with inclined surfaces or whose thickness on the circumference is too great of the precisely measured piston pressure cannot separate, since then the piston is opposed by too great a resistance. Such inserts would not have the necessary resilience on the circumference to ensure deformation and wedging after insertion into the capsule b .

For this purpose, the piston 16 is expedient with an interposed elastic member, for example a spring 17, which transmits only a limited desired pressure. Piston and spring may be contained in a housing or in a cylinder 18 which is vertically movable and simultaneously serves as a hold-down device for the tape during the cutting process.

This creates a simple and effective means of eliminating those not corresponding in the dimensions Sort out sealing inserts.

A further type of production is shown in FIG. 4. Here, the starting material has the In the form of a rod 19 which is notched at regular intervals by a tool 20 with a sharp edge whereupon parallel cuts through the bottom of the notches for the extraction of each disc-shaped sealing inserts are performed.

The sealing inserts according to the invention consist of plastic material of sufficient elasticity. For example are listed: rubber, synthetic rubber, butyl, isopropene, isobutylene, polyethylene, Polyvinyl chloride, polystyrene and the polyamides, although of course this list makes no claim can raise to completeness.

The angle at the ring edge formed by the bevel should be between 20 and 50 °, advantageously be about 40 °.

Claims (5)

Patent claims: 1. Disc-shaped sealing insert made of plastic material, flat on both sides, for capsule closures with flat inner walls, whereby the outer diameter of the sealing insert is slightly larger than the inner diameter of the capsule, characterized in that the sealing insert has a single or double, extending over the entire Has circumferential bevel, so that a thin flexible edge is formed, which bends slightly inwards due to compression in the capsule and the insert in the capsule wedged or jammed. 2. Sealing insert according to claim 1, characterized in that the radial length of the bevel is approximately equal to the thickness of the disc at the start of the bevel. 3. Device for the production of disc-shaped sealing inserts by rolling according to claim 1, characterized in that a strip (1) made of optionally heated material between two counter-rotating embossing rollers (5 and 6) or between counter-rotating moving mold plates is passed through, the embossing rollers or mold plates recessed Have embossings corresponding to the desired, provided with inclined surfaces inserts, and the band is pressed into thin webs between the delimitation ribs of the embossments, whose strength is sufficient to allow the tape to be pulled into further processing stations up to Ensure separation of the individual inserts when they are inserted into the capsules. 4. Apparatus for the production of disc-shaped sealing inserts according to claim 1, characterized characterized in that a molding tool (12) is brought into action on a belt (11) whose profile corresponds to the bevel of the edge Corresponds to inserts, but the shape of the bevel does not go up to the final separation the insert is carried out so that a remainder of a small cross-section remains, and that the final separation with the help of a piston (16) under the action of a spring (17) takes place, which is guided perpendicular to the direction of tape movement, wherein the piston is dimensioned so that the sealing insert is separated and pushed into the capsule at the same time. 5. A method for the production of disc-shaped sealing inserts according to claim 1, da- characterized in that the starting material is in the form of a rod (19) in a known manner which is notched at regular intervals by a tool (20) with a sharp edge whereupon parallel cuts through the bottom of the notches to extract the individual Sealing washers are guided. Considered publications:
Belgian Patent No. 507,419;
U.S. Patent Nos. 2,341,925, 2,543,755, 681,742. 1 sheet of drawings