DE2153685A1 - - Google Patents

Description

PATENT LAWYERS

DR.-ING. R. DOERING. DIPL.-PHYS. DR. J. FRICKE

BRAUNSCHWEIG MUNICH

Continental Can Company, Inc. 633, Third Avenue, Few York 17, N.Y. /UNITED STATES

"Closure" consisting of a container and a cap "

The invention relates to a closure consisting of a Container made of glass or the like and a closure cap that can be applied by pressing on, preferably detachable by screws, in which the container neck has a flat, relatively abrupt sealing section surrounding the container opening inner limiting radius and an outer sealing section - preferably provided with threaded elements has on the neck circumference and the closure cap has a cap base, an apron section extending from its edge and has a sealing body which is arranged to cooperate with the outer sealing section -and preferably in of sufficient thickness to accommodate the threaded members the skirt section and to cooperate with the flat thief section in a channel in the cap base extends.

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As can be seen from the explanation of the type of closures on which the invention is based, it is advantageous prove to one by pressing in the sealing position bringable and releasable by a screwing closure. Such closures are generally known. Such closures The type in stamps are mainly used as glass containers for packaging various foods used. The caps are at high speed, for. B. 1,000 pieces per minute on the associated Container necks by a straight downward pressing process in a sealing machine of known type upset. For example, it should be noted that Large quantities of these closures are implemented in the glass containers in which toddler food is packaged.

The sealing body, 'which can be used in the closures according to the invention, is preferably made of one plastisol-like sealing material made as it is closer for example, is described in U.S. Patent No. 2,841,304. This material is molded into the cap bowl or introduced by flowing in in a known manner, using commercially available rubbings and techniques. The containers of the closures for which the invention is suitable can consist of glass or of another material, the

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with the diaphragm cooperating service surfaces from one flat, upper running approximately perpendicular to the axis of the container and one on the circumference of the -preferably with threaded sections provided container neck running lateral sealing surface ". If the container neck with threaded sections is provided, can be made in the sealing body Platisol after placing the end cap on the container neck corresponding counter-threaded elements within the skirt section form, which solidify in the sealing body and thus complementary threaded elements in the Form Dicbtkörper, which allow a loosening of the cap by screws.

Closures of the general type to which the invention relates include. in U.S. Patents 3,270,904, 3,285,452, 3,344,943, 3,360,148, 3,371,813, 3,374,601, 3,448,881, and 3,473,683.

It is the object of the present invention to develop a closure of the type described in more detail in such a way that in particular in the case of containers whose flat Dicbtabschnitt by a radially inner, relatively abrupt curvature is limited, the ingress or migration of oxygen into the free head space above the product below the The bottom of the cap is largely excluded or made more difficult.

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This object is achieved in that the Channel in the cap base inwards through a wide base section is limited, which extends from the central part of the cap base in the shape of a truncated cone upwards and radially outwards, and the narrower, curved transition section between the cap base that delimits the channel to the outside and skirt section passes over, and that the sealing body lining the channel and the skirt section continues, the flat as well as the outer sealing section and the apron section and the dimensions of the channel in the cap base are matched to one another so that they are in the fully closed position located closure cap of the sealing body by the relatively abrupt inner radius of limitation of the container neck deep to near a narrow annular band-shaped section of the frusto-conical inner boundary wall of the Canal is notchable. Due to the special design of the channel and the adaptation of the dimensions it is achieved that the inner, relatively abrupt radius which delimits the flat sealing section and which directly delimits the container opening, deeply notched into the material of the sealing body, compared to a central section of the inner frustoconical Boundary wall of the channel in the cap base. This removes the sealing material between the radius and the frustoconical Wall is enclosed, squeezed into an annular area of very thin cross-section, which is used to reduce the penetration of oxygen into the free head space from the outside, and which further prevents the

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Cap can continue to set over time, resulting in a substantial one Increase in the torque would result, which would be required to open or unscrew the cap from the container neck is.

The relatively large radial width of the gently sloping boundary wall section of the channel in the cap base continues to provide in connection with the flat sealing section and the this section radially inwardly delimiting a relatively abrupt radius of curvature for the effects of tolerances or variations in the cap base depth and the glass container diameter and thus reduce these tolerances on the sealing state of the closure will be of less influence.

Due to the new design, the hanging apron section of the cap also extend substantially in a straight line, the threaded sections on the container neck in one substantially vertical cylinder area are arranged. This further increases the opening torque connects.

The invention is illustrated below with the aid of schematic drawings explained in more detail in an execution example.

Show it:

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Pig. 1 in Teilansicbt is a plan view of a closure according to the invention;

Figure 2 is a vertical section along section line 2-2 of Pig. 1, with the cap in front of her Application to the container belly is shown;

Pig. 3 shows a partial section on an enlarged scale d-ee the bottom and the front section on the right Side of the cap after Pig. 2 and

Pig. 4 a partial section on the same scale as Pig. 3 with the cap attached to the neck of the container,

The closure cap 5 shown in the Figures comprises a scallop-shaped body with a cap base 6 and an apron portion 1 depending therefrom. and a lateral sealing section 11 which lines the inner surface of the apron section 7.

The central portion of the cap base 6 of the cap is preferred raised, in such a way that it forms a counterfeit-proof projection 12. This projection 12 can be configured in the manner shown in U.S. Patent 3,160,302.

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be educated. If such a cap 5 "at a closure is used, in which a vacuum is created in the headspace, the projection 12 is pulled down under the influence of the vacuum. However, if the cap 5 is rotated or for counterfeiting purposes is influenced, so that the vacuum is interrupted, the normally downwardly protruding projection 12 jumps Suddenly outward and with an audible noise.

The cap bodies or shells can be punched out or otherwise made from tinplate, aluminum sheet or other suitable Materials are mass produced or molded in a known manner and with known equipment will. The shell bodies can be provided with a lacquer coating in a suitable manner, enamelled or otherwise Way to be coated or provided with a treated surface inside and outside to provide protection and around apply decorative elements in a known manner.

The ring seal 8, 11 within the cap body is preferred made from a plastisol which has a known composition. The seal can be in the cap shell be molded or incorporated in a known manner, for example in the manner of US Patents 3,360,148 and 3,473,683. After inserting the plastic oil seal, the lined caps become a process subject to which the plastisole in its final

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greedy, rubber-like state.

The details of the construction and arrangement of the conduit receiving the seal and that cooperating with the seal The sealing surfaces of the container 19 are of the highest quality Importance and be associated with the Pig. 3 and 4 explained in more detail. In these figures it can be seen that the the seal receiving channel 10 of the cap body, which serves to receive the section 8 of the seal, on the one hand by a frustoconical or linearly inclined, annular, inner wall section 15 and an outer one curved or curved wall section 16 is limited. For the production of the sealing section 8 of the ring seal which takes over the upper seal and which is received in the channel 10 care must be taken that this channel is essentially completely covered with the sealing material is filled in, as is apparent from US Pat. No. 3,360,148, with the inner edge of the sealing section ends in a cut rib or bead 17.

As can be seen from Fig. 3, the radial width of the frustoconical inner boundary wall 15 of the channel 10 approximately twice as large as the radial width of the curved, outer wall section 16. Even if this particular relationship is not necessarily critical, it should

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lent to be noted that the frustoconical inner wall 15 should be noticeably wider than the curved outer section. It should also be noted that the depending skirt portion 7 of the cap 5 has an upper cylindrical portion 18 which is in a truncated cone shaped section 20 merges, which in turn dips into a relatively wide or deep cylindrical section 21. The bottom end of the apron section is 3? Shape of an outwardly widened and inwardly curled one Bead 22 formed, which is produced in a known manner.

The sealing section which is perpendicular or arranged on the peripheral wall 11 of the sealing body is relatively thick up to the section where it thins into a feather-like edge, namely at the point at which the cap skirt merges into the widened bead section 22.

According to iig. 4, the neck 25 of the glass container 19 has both a top sealing surface as well as a side sealing surface, reference being made to the surfaces on the upper edge and on the outer peripheral wall of the container neck 25. These are those surfaces of the container 19, on which the sealing body in the cap 5 engages. These areas are closely spaced with precisely prescribed dimensions manufactured to controlled tolerances.

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The upper sealing surface of the container neck includes a relatively wide, flat annular surface 26, the inner edge of which merges into the vertical inner surface at a peripheral corner 27 or coincides which corner is commonly referred to as the inboard top radius. This inner upper Radius 27 forms a smooth but relatively abrupt inner one Edge or corner, which has a special and important puncture, in that the upper sealing body 8 in an intermediate area of the frustoconical wall 15 is notched deep.

The side sealing surface of the container 5 initially has a slightly beveled upper portion 30 and a lower cylindrical portion 31. Outwardly protruding threaded elements 32 are located between these sections provided, the backs of which lie in a generally perpendicular cylindrical surface. It can be seen that the threaded sections Form 32 sections of a continuous thread. But you can also go through a variety of Partial threads are shown, as shown in FIG. 4 of US Pat. No. 3,270,904.

The caps 5 are applied to the containers 19 by a generally rectilinear, downward movement, in which the side sections 11 of the sealing

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Deform the body enough to pass the threaded elements slide away. In many cases, the head space is inside of the filled container is filled with steam when the cap is applied. Then when the steam condenses, the resulting vacuum serves to hold the closure caps on the container bellows. It can be seen that the inner upper radius 27 of the upper sealing surface of the container deep into the upper sealing recess 8 of the annular sealing body engages, namely opposite and until the closest approach to a narrow intermediate band of the frustoconical Wall 15 of the channel receiving the seal The sealing material 8 is under clamping pressure in both directions set with respect to the relatively narrow inner edge 27 so that only a relatively thin section 35 of sealing material remains in order to keep the glass at the corner 27 separated from the opposite frustoconical wall 15. However, this material section 35 has a considerable radial width. Due to the fact that the section of material 35 is extremely thin, but occupies a considerable radial width, this section forms a blocking path, which offers a high degree of resistance to the migration or penetration of oxygen inwardly into the container. In other words, this means that the permeability of the seal is limited to the passage through it extremely thin material section, which one

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forms a relatively long (i.e., viewed in the radial direction) and height-wise relatively narrow path for the gas passage.

This relation or interaction between the above inner edge or the upper inner radius 27 of the neck of the glass container and the opposite frustoconical Wall 15 of the seal receiving channel 10 has a further puncture. So this relationship serves to further Deposition of the cap 5 on the container neck 25 over a longer period of time To prevent or limit time. This puncture in turn prevents the clamping effect of the sealing section 11 of the sealing body with respect to the outer circumference of the container neck and thus a solidification of the handle with which the cap sits on the container neck is prevented. Such a solidification would result in a significant increase in the torque required to remove the cap by screws Remove container neck. In this context it is still possible pointed out that the position of the crowns of the threads 32 in a substantially cylindrical surface, so by the vertical course even if a setting of the cap 5 occurs to a small extent, this does not result in any solidification of the Handle leads with respect to the threads.

From the in the Pig. 4 relationships shown between the truncated cone shaped wall 15 of the channel 10 and the inner upper

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Radius 27 clearly shows that minor changes in the Training and the dimensions of these interacting parts do not change the circumstances significantly. After that you can. so slight variations in dimensions or parts for manufacture are ignored, resulting in mass production of caps and containers considerably easier.

It can also be seen that by solidification of the sealing material the deformations caused by receiving the threaded elements 32 are stabilized, so that counter-threaded elements in the side seal portion 11 of the sealing material develop. Therefore, when the cap is rotated, it is due to the cooperation of the threaded members pressed on the container neck and the sealing section 11 from the container neck.

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Claims (9)

-H- claims 1. Closure consisting of a container made of glass or the like. and a closure cap which can be applied by pressing on, preferably detachable by a screwing process, in which the Container neck has a flat sealing section surrounding the container opening with a relatively abrupt inner limiting radius and an outer sealing section, preferably provided with threaded elements, on the neck circumference, and the closure cap has a cap base, an apron section extending from the edge thereof and a sealing body has, which is to interact with the outer sealing section - and preferably in one for receiving the sealing elements sufficient thickness- along the skirt section and to interact with the flat sealing section in a channel in the cap base, characterized in that that the channel in the cap base (6) is limited inwardly by a wider base section (15) which extends upwards and radially outwards from the central part (12) of the cap base, and in a narrower, curved transition section delimiting the duct outwardly; (16) between the cap base (6) and Apron section (7) passes over, and that the sealing body (β) lining the channel and the apron abscbnibt, the 209838/0103 flat (26) and the outer circumferential sealing section (30, 31) as well as the skirt section (7) and the channel (10) in their dimensions in the cap base (6) are matched to one another in such a way that they are in full closure position Closure cap (5) of the sealing body through the relatively abrupt inner limiting radius (27) of the Container neck deep to near a narrow annular band-shaped section of the frustoconically extending inner Boundary wall (15) of the channel can be notched. 2. Closure according to claim 1, characterized in that the radial width of the frustoconical extending inner boundary wall (15) of the channel (10) is noticeably larger than the radial width of the flat sealing section (26) of the container bottom. 3. Closure according to claim 1 or 2, characterized in that that the radial width of the frustoconical inner boundary wall (15) is at least 1.5 times larger than that of the narrower, curved transition section (16). 4. A closure according to claim 1 to 3, characterized in that the angle of inclination of the The frustoconical lined boundary wall (15) of the channel (10) does not exceed about 30 °. 209838/0 103 5. Closure according to claim 1 Ms 4, characterized in that that the radial width of the channel (10) at least by the factor 1.5 greater than that radial width of the flat Dicbtungsabschnittes (26) of the container neck. 6. Closure according to claim 1 to 5, with threaded elements on the outer circumference of the container neck, characterized marked that the crown areas of the Thread elements lie on a common cylinder surface. 7. Closure cap for a closure according to claim 1 "to 6 with a cap base, an apron section and a cover body, which the apron section and an on Edge of the cap bottom arranged channel lines, d a characterized in that the channel (10) inwardly through a wider frustoconical bordering wall (15) running above and outside and outwards through a narrower, curved one and the bottom transition wall connecting to the apron section (16) is limited. 8. Closure cap according to claim 6, characterized in that the conical pot-shaped 209838/0103 inner wall section (15) of the seal receiving Channel (10) has a radial width which is at least about 1.5 times greater than the outer, curved Limiting section (16) of the channel (10). 9. Closure cap according to claim 7 or 8, characterized in that the frustoconical inner portion of the seal receiving channel (10) has an angle of inclination that is not about 30 exceeds. 209838/0103 IS Blank page