JPS59103835A - Vessel and its manufacture - Google Patents

Abstract

1. Container with inset bottom and/or lid, more especially packaging box for food, chemical, industrial or other products, particularly for pressurized products or products necessitating thermal processing such as pasteurization or sterilization and consisting of a composite tubular body (2), a base (4) and/or a lid (6) made up of a sealing flange (16), a collar (17) and an annular rim (19) curving back from the circumference of the ends (3) and (5) of the tubular body (2), the said container additionally comprising a thermoplastic connection (31) for fastening the bottom (4) and/or the lid (6) extending over the whole height of the collar (17), bestriding the upper and/or lower edges (38) of the tubular body (2) and covering the ends of the latter to a depth corresponding to the height of the curved end (22) of the annular rim (19) of the bottom (4) and/or of the lid (6), characterized by the fact that the annular rim (19) of the bottom (4) and/or of the lid (6) has an outer circumference receding from the outer circumference (11) of the tubular body (2), the edge (33) of the said annular rim (19) engaging in a peripheral groove resulting from local crushing of the outer circumference (11) of the tubular body (2) by the said annular rim (19).

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a hollow tubular body (can body) consisting of a bottom or lid entirely made of composite material, having a closing plate portion, a neck portion, and a current 7-way ridge.
It relates to containers such as cans, boxes, and packaging which are fixed to the ends of containers and which contain foods, chemicals, merchandise, and other products. The present invention particularly relates to containers for containing products that require heat treatment such as sterilization or sterilization or products that are under pressure. The invention also relates to a method of manufacturing such a container.

[Prior art]

An improved composite container and a method for its production are known from French Patent Publication 2,473,994. In this container, the body of the container has a composite structure, with a structural material (supporting material) inserted between two polypropylene films. Additionally, a sealing gasket is disposed between the body and the lid in addition to providing a suitable sealant along the sealing area.

Also, US Pat. No. 4.270.475 discloses a method for manufacturing containers with a straight edge. In this method, the diameter of the lid flange is slightly smaller than the diameter of the body of the container. .

If the edges of the lid are caulked by double seaming, the ends of the body will bend slightly inward, so that the container and its lid form a straight outer wall. In this patent, the body of the container is constructed of a spirally wound layer of pole paper, and a film is laminated on the inner surface of the &-lole paper.

US Pat. No. 2,986,319 discloses an aerosol container and method of making the same. In this method, the container is adapted to vent internal gas, and the inner surface of the body of the container is coated with a non-breathable film. However, when securing the lid to the barrel, a breathable material is interposed between the two components.

Furthermore, French Patent Publication No. 2,320.867 discloses a thin-walled container whose lid is secured by caulking, and a method for manufacturing the same. A sealing member is interposed between the lid and the body of the container. The lid is double-sealed along its outer circumference and additionally folded towards the end wall of the container.

However, because the aforementioned containers consist of a composite tubular body consisting of multiple strips of pole paper joined together, they cannot be used for products under pressure, such as beer or champagne, or sealed in a vacuum. It is not possible to accommodate all the produced products. This means that in beer containers the pressure can reach 6.5 bar, in which case the lid or base may become detached from the composite body. In order to avoid this inconvenience, a metal body has heretofore been required in place of the cardboard body (1), which greatly increases the cost of the container.

The above also applies to foods that require heat treatment at a temperature of about 142° C. for heat sterilization or sterilization.

On the other hand, in conventional containers of the type mentioned above, there are protruding beads at the upper and lower ends of the container, which are produced by crimping the bottom or lid onto the body.

〃) Such beads are especially an obstacle to the transportation and storage of containers.

That is, when such containers are transported, they are usually collected in the form of containers or flats, but the beads create wasted space, which can add up to a considerable amount.

In many cases, the beads of 92 adjacent containers form a circle, so that the containers tend to be inclined with respect to the vertical direction. This impairs the stability of the containers stacked one above the other. This is particularly noticeable when containers are stacked vertically without special packing all around.

[Summary of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problem of sloping in the prior art. That is, an object of the present invention is to improve a container consisting of a hollow tubular composite body, a bottom and/or a lid, in which the joint between the body and the bottom and/or the lid has a relatively high internal pressure and an external pressure. The entire purpose is to provide a container that can be placed under pressure. Furthermore, the present invention provides a container that does not form a bead at the joint and can therefore be arranged side by side within a small space and can be stacked one above the other in a stable manner. The purpose is to provide

For this purpose, the present invention comprises a hollow tubular body made of a composite material and a bottom and/or a lid crimped onto the body, the bottom and/or the lid being a closed root part. ,
In a container comprising a neck and an annular flange bent around the edge of each end of the body, heat is applied over a predetermined longitudinal width of the neck to secure the bottom and/or the lid. Plastic joining means are provided, said thermoplastic joining means straddling the upper and/or lower edges of said barrel and corresponding to the height of the folded ends of said bottom and/or lid annular flanges. The outer edge of the annular flange is recessed with respect to the outer periphery of the barrel.

The main advantage of the invention is that the bond between the composite body and the bottom and straddle is strengthened. Due to this IE, there is virtually no twisting or destruction of the bottom and lid due to internal or external pressure, and the container is liquid-tight against pressurized liquid contents and resistant to external air conditions. will improve.

Therefore, the container of the present invention is capable of storing products with relatively high pressures, such as beer or gas-filled drinking water, as well as those that require heat treatment of the contents, especially sterilization or sterilization. You can store your produce.

〔Example〕

The container 1 of the present invention has a hollow tubular body 2 .

The body 2 has any suitable cross-sectional shape, such as circular or polygonal. One end 3 of this hollow tubular body 2 is sealed by a bottom 4, and the other end 5 is sealed by a lid 6. The bottom 4 and the lid 6 are substantially identical, except that the lid 6 may optionally be provided with opening means (not shown). This container can be used to store any product, such as granular, powdered,
Can be used to contain all foods, chemicals, commercial products, and other products in liquid or gaseous form, products under pressure, or products that require heat treatment for sterilization or sterilization. .

According to the invention, the bottom 4 and the lid 6 are formed at the ends 3, 5 of the body 2 by caulking, seaming, embossing or other known techniques.
are fixed respectively. The outer circumferences 7, 8 of the bottom 4 and the lid 6 (to which the blades are added to secure them) are recessed inwardly than the outer circumference 11 of the barrel 2, or are in the same vertical elevation. The body 2 can be made of metal, plastic or composite material. If the barrel is made of metal, the inner wall of the barrel is preferably coated with a special coating, in particular a food-compatible coating. When the body is made of a composite material, the hollow tubular body g32 is composed of the following three elements. (a) an outer member 12 consisting of a label formed from a paper support reinforced with a backing layer of metal such as aluminum, a printed product, and a plastic film or coating; and ←) a new or recycled product. multiple sheets of cardboard 13+, 132
．． (c) an inner member 14 consisting of a paper support, a metal layer, a glass film or a coating film (see FIGS. 2 and 3). .

In order to facilitate insertion of the bottom 4 and the lid 6 into the corresponding ends 3, 5 of the body 2, the ends 3, 5 are shaped so as to form a flared acid section 15 entirely.

Referring to FIGS. 4 and 5, the bottom 4 and the lid 6
each consists of a closure plate part 16, a neck 17 connected to said closure part 16 via a curl 18, and an annular flange 19 connected to the neck 17 via another curl 20. The flange 19 consists of a straight flat part 21 and a downwardly bent end part 22. In order to facilitate insertion of the sole 4 or the lid 6 into the flared neck 15 formed on the ends 3, 5 of the body 2, the neck 17 is slightly tapered.

If the container is to be filled with a product under pressure, the closing plate part 16 of the bottom 4 or of the lid 6 is convex (reference numeral 23 in FIG. 4). In the case of beer cans, the pressure can reach 6.5 bar when the temperature is approximately 65°C.

On the other hand, while maintaining the pressure within a total of 2.5 par,
The bottom 41 or the closing plate part 16 of the lid 6I may be flat if the purpose is to fill the container with a product that is to be heat-treated at a temperature of 40° C. to 160° C. However, due to heat treatment, the closing plate portion 16. Taking into consideration that the closure plate portion 16□ will expand to the extent that (Figure 5).

The shape of the bottom 4 or the lid 6 is formed by embossing or other known methods so that the bottom or the lid 6 conforms to the cross-sectional shape of the body 2.

Referring to FIG. 6, the bottom 4 or lid 6 is manufactured from a stamped metal blank 28. The inner surface 29 of the blank 28 in contact with the contents is coated with a special food-compatible varnish 30.
It is coated with a film. According to the invention,
The bottom 4 or the lid 6 is provided with a thermoplastic film 31 and coated with a food-compatible varnish 30. This thermoplastic film 31 extends over the entire island of the neck 17 and #9
The green 3 of the bent end 22 extends along the lower surface of the straight part 21 of the
It has reached 3. Of course, the thermoplastic bond or connection between the body 2 and the bottom 4 or the lid 6 essentially depends on the longitudinal (ie vertical) dimension of the neck 17.

If necessary, the neck portion 17 and the straight flat portion 21 of the annular 7 flange 19
A sealing member 34 is attached to an inner corner 35 formed by
By providing this, the bond or connection can be strengthened. This sealing member 34 is made of thermoplastic film 3
1 and preferably extends over a predetermined width or a predetermined radial width 36 of the straight portion 21 of the flange 19 and a predetermined height or predetermined axial width 37 of the neck portion 17. ing. Also, this height 3
7 is preferably larger than the width 36.

Next, referring to FIG. 7, after the bottom 4 or the lid 6 is completely inserted, a preliminary caulking process is performed to tighten the lower surface 32 of the straight flat part 21 of the annular flange 19 to the wide-divergent neck part 15 of the body part 2. Rim 38
At the same time, when the seal member 34 is fully used, the seal member 34 is compressed to a certain extent.

Next, as shown in FIG. 8, after this preliminary caulking process, either a final caulking process or a final embossing process is performed. In this step, on the one hand, the bottom 4 or the lid 6
The neck portion 17 is straightened and fully engaged with the inner peripheral surface 39 of the barrel portion 2, and the T-face 32 of the straight flat portion 21 of the annular flange 19 engages with the edge 38 of the wide-spread gun portion 15. , on the other hand, this diverging neck 15 is also straightened and bent towards the central axis of the body 2 . Additionally, annular 7 langes 1
The bent end portion 22 of No. 9 sinks into the outer surface 11 of the body portion 2 . As shown in FIG. 8, the outer edges 7, 8 of the bottom 4 or the lid 6 are slightly recessed relative to the outer periphery 11 of the body 2.

FIG. 9 shows another embodiment of the invention (in the embodiment J, the caulked outer edges 7, 8 of the bottom 4 or the lid 6 are arranged in a vertical plane 9, which is the same as the outer circumference 11 of the body 2). 10, the diverging neck 15 is concave and constitutes an extension of the body 2.

The thermoplastic film 31 is welded either before, during, or after the final crimping step or the final embossing step. Welding can be performed by any suitable method such as conduction, radio frequency, ultrasonic, laser, or by heated wheels, rotating wheels, or other mechanical methods.

In this way, four interaction areas are formed between the barrel 2 and the bottom 4 or the lid 6. That is, the first region 41 is located at the ends 3, 5 of the body 2, and this first region serves to prevent the ingress of moisture and has a breaking strength of approximately 15% of the total breaking strength. Has strength. The second region 42 is located along the edge 38 of the body 2 and has a total breaking strength of approximately 5
% breaking strength. The third region 43 is the seal member 3
4, which provides the necessary liquid tightness.

The fourth region 44 is located along the neck 17 and provides a breaking strength of about 80% of the total breaking strength.

In another embodiment shown in FIG. 10, the neck 15 of the body 2 and the annular flange 19 of the bottom 4 or the lid 6 are wound together, and the neck 15 is connected to the fold 45 of the flange 19 and the fold 46 of the flange 19. is being held between.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a container with a caulked bottom and lid according to one embodiment of the invention; FIG. A similar longitudinal section shows the complete formation of a diverging neck at one end of the barrel to facilitate insertion of the bottom or lid into the barrel, and Figure 4 is for accommodating product under pressure. diametrical vertical cross-section of the bottom or lid of a container intended for
Figure 5 is a sectional view similar to Figure 4, showing the entire bottom or lid of a container intended to contain a product requiring heat treatment; Figure 6 is a full detailed view of the lid or bottom of the invention; Figure 7 is a radial vertical cross-sectional view showing the entire shape of the end of the body, showing the bottom or lid inserted into the body, and Figure 8 is a bottom guide to the body. This is a radial vertical cross-sectional view showing the installation of the bottom or lid, showing an embodiment in which the outer τl113J:J-shaped flange of the bottom or the lid is slightly recessed with respect to the base line of the outer g10 contour of the body. FIG. 9 is a cross-sectional view similar to FIG. 8, and shows the actual embodiment in which the outer annular flange of the tongue is flush with the base line of the outer contour of the body; The figure shows in radial vertical section d'1 of a part of another embodiment, where the bottom or ii tray is fixed to the body by seaming. DESCRIPTION OF SYMBOLS 1... Container, 2 Body 1.3, 5... End of body, 4... Bottom, 6... Lid, 16... Closing plate portion, 1
7... Neck, 197 lunges. Patent Applicant 4 Rujie Silex Patent Application Agent Patent Attorney Akimizu Akira Patent Attorney Kazuyuki Nishidate Patent Attorney Kyosuke Tsuchinakayama Patent Attorney Akira Yamaguchi Patent Attorney Masaya Nishiyama

Claims (1)

[Claims] 1. Comprised of a hollow tubular body made of a composite material, and a bottom and/or a lid crimped to the body, the bottom and/or lid having a closing plate portion and a neck portion. , an annular flange folded around the edge of each end of the body, the bottom (4) and/or the lid (6)
) For complete fixation, thermoplastic joining means 6N are provided over (a predetermined longitudinal width of) the neck α7, and the thermoplastic joining means Oυ are attached to the upper and/or lower edges of the body (2). At the same time, the bottom (4) and/or the lid (6) have an annular 7-land bend that covers the end of the body (2) over a height corresponding to the height of the end ridge. The outer edge (8) of the annular flange is connected to the body (2).
) A container characterized by being recessed with respect to the outer periphery (b). 2. The thermoplastic bonding means consists of a mineral thermoplastic film 6υ, the thermoplastic film 6υ is coated with another food-compatible resin film 00, and the other film is attached to the bottom (4) and/or the lid. The thermoplastic film covers the inner surface of the metal sheet (C) constituting (6), and the thermoplastic film extends over the entire height of the neck α7 and reaches the outer edge of the annular 7 flange α. The container according to claim 1, characterized in that the lower surface (2) of the annular seven flange α is covered. 3. A sealing member (2) is provided on the bottom (4) and/or the lid (6) at the inner corner (to) formed by the neck (17) and the annular 7 lanso α, and the sealing member (2) is The sealing member (good) is in contact with the thermoplastic film 0η, and the sealing member (goods) extends along the annular flange α over a predetermined width and extends along the neck αη over a predetermined height (support). A container according to claim 1, characterized in that: 4. The container according to claim 3, wherein the height of the sealing member is greater than its width. 5. After crimping, four interaction areas are formed between the body (2) and the bottom (4) and/or the lid (6). container. 6. The first region 01) is the outer end (3, 5) of the trunk (2)
6. A container as claimed in claim 5, characterized in that the container is located at an angle of 100 degrees and provides approximately 15% of its breaking strength and provides full protection against the ingress of moisture. 7. Container according to claim 5, characterized in that the second region) is located at the edge of the body (2) and provides approximately 5% of the breaking strength. 8. The container according to claim 5, wherein the third region (c) is located at the end of the seal portion. 9 Is the fourth area (goods) the neck α? 6. Container according to claim 5, characterized in that the container is located between the opening and the body (2) and provides approximately 80% of the breaking strength. 10. When producing a container by fixing the bottom and/or lid, which comprises a closing plate portion, a neck portion, and a current flange, to a hollow tubular body made of a composite material by caulking or embossing, the body (2) at least one end of the metal blank (with a wide neck αG formed at 3.5J and a food-compatible resin applied to the inner surface of the metal blank), and pressing the blank.
A bottom (4) and/or lid (6) having a shape that matches the cross-sectional shape of the body (2) is formed by having a closing plate part (2), a neck part a, and an annular 7-lung bud, A thermoplastic film 6η is coated on the resin at the side surface and the inner surface (2) of the annular flange α, and a sealing member Nff is applied on the inner corner between the neck stem) and the annular flange OQ.
1, insert the bottom (4) and/or the neck α7 of the lid (6) into the phantom wide-spread neck a, and insert the bottom (4) and/or the neck α7 of the lid (6) into the outer edge of the annular 7 flange 4) on the outer periphery of the body (2). A method for manufacturing a container comprising fixing the bottom (4) and/or the lid (6) by invaginating the surface αυ.