JP2003506281A - Can closing device - Google Patents

Abstract

(57) Abstract: An annular upper edge is provided on the main body 10 of the can, and the upper edge is incorporated by a seaming bead 11 from the outside with a structural ring 15 to which a sealing film 30 is removably mounted. Device for closing a can, comprising a metal lid 20 defined by an upper wall 21 provided with a peripheral seal 21a and a depending side wall 22, the depending side wall 22 having at least one inner shoulder 23. The inner shoulder 23 is circumscribed by a circumference having a diameter dt larger than the outer diameter d of the upper edge of the can and smaller than the outer diameter dc of the seaming bead 11, and the inner shoulder 23 is formed by a seaming bead. 11 so as to be housed underneath, thereby axially securing the lid 20 in the closed position and pressing the peripheral seal 21a against the upper edge of the can body 10 in a tightly secured manner Keep, the hanging side wall 22 of the lid 20 Release and while performing reclosing operation, is elastically deformed such that the inner shoulder 23 can move on the seaming bead 11, the closure device of the can.

Description

Detailed Description of the Invention

TECHNICAL FIELD The present invention is commonly used to store a variety of products, such as food products, and protects products contained in cans after the lid is first opened and is made of metal. And a tubular cylindrical metal can closure device closed by a reclosable lid.

BACKGROUND OF THE INVENTION Metal cans, which can be reclosed after initial opening, are well known in the art. In this construction, the lid is fixed at the upper edge of the body of the can on a structural ring seamed together with a metal film. The metal film acts both as an encapsulant and as a means of ensuring that the can is tightly closed until the first opening of the can. The metal film ensures that the can is tightly and safely reclosed, but this structure allows the tool in the form of a lever to open the lid and the metal film of the inner encapsulant to be peeled off. It requires a cutting tool and the operation of opening the can becomes a little laborious. In addition, this type of metal film, which is usually a thin aluminum foil, often causes the user to cut their hands, as the protrusions remain under the structural ring.

In another known construction, the closure device is usually made of a plastic material, with a lid formed by a thin foil of metal or composite, which is glued at the periphery to the upper area of the can. , A top lid that can be fitted to the top of the can. This allows the can to be opened very easily by hand, but with this construction it is only possible to ensure a closed chain resistance until the sealing film is peeled off or removed. This is because the upper lid does not secure the closed chain state of the can but only covers the upper end of the can.

In yet another known structure used for glass bottles, the lid is made of metal foil and interacts with a screw thread incorporated outside the upper opening of the glass bottle,
It has a depending peripheral skirt with a plurality of small inner radial protrusions. Keeping the lid axially relative to the opening of the bottle by rotating the lid to fit these small inner radial projections under the threads of the bottle and pressing the lid downwards,
Ensure that the lid is closed tightly during the reclosing operation after the initial opening. The lid is usually provided with an inner sealing gasket, which is made of an elastomeric material and can be compressed against the upper edge of the bottle. Although the lid opening operation is simple and provides a simple closure that allows the lid to be tightly closed as often as necessary, this prior art construction provides a glass that incorporates peripheral threads. Or it can only be applied to bottles made of similar materials.

Briefly, the prior art ensures that the lid is tightly and safely reclosed by a structure that normally requires the use of tools or auxiliary equipment that allow the lid to be opened manually. A can closure device is provided. Known solutions that provide an easy way to open the lid and reclose it safely and tightly include bottles made of glass or other similar materials,
Applies only to stamped metal lids.

DISCLOSURE OF THE INVENTION It is an object of the present invention to provide a closure device for metal cans, which does not use tools or auxiliary equipment, is not dangerous to the user and is simple. Equipped with a non-penetrable, tight seal that can be peeled off, and a lid that is also made of metal, that can be easily opened by hand with the force of the user's finger and that can be tightly closed again .

A further object of the invention is to provide a closure device for a can as defined above, which makes it possible to eliminate the injection operation of the plastic material and thus increase the production speed of the components of the can. It is to be.

[0008] For the above-mentioned purpose, a structural ring having an annular upper edge provided on the body of the can, and a sealing film being removably attached to the upper portion of the upper edge of the can, is provided with a seaming bead from the outside. This is accomplished by providing a can closure device incorporated by

According to the invention, the device comprises a metallic lid 20 defined by an upper wall 21 provided with a peripheral seal 21a and a depending side wall 22, the depending side wall 22 comprising at least one. The inner shoulder portion 23 has a circumference of a diameter dt larger than the outer diameter d of the upper edge of the can and smaller than the outer diameter dc of the seaming bead 11. Is formed so as to be accommodated under the seaming bead 11, fixes the lid 20 in the closed position in the axial direction, and presses the peripheral sealing portion 21a of the lid 20 against the upper edge of the main body 10 of the can to make it tight. Keeping fixed, the depending side wall 22 allows the inner shoulder 23 to move over the seaming bead 11 during opening and reclosing operations of the lid 20.
Elastically deformable.

The structure defined above allows for the production of a can that is closed tightly by a body of conventional structure and a lid of the new structure by a sealing film that can be easily and safely removed until it is first opened. to enable. The can is completed by a lid that can be easily opened and again closed tightly.

[0011]   The present invention is described below with reference to the accompanying drawings.

BEST MODE FOR CARRYING OUT THE INVENTION According to the drawings, a can of the present invention is made of coated or uncoated tin foil, aluminum foil, or other suitable material, at least its upper end. In the region of the rim, a cylindrical body 10 is provided, the outer side of which is formed as a seaming bead 11, which defines an opening A leading to the interior of the body 10 which is closed by a lid 20. Similarly, the metal structural ring 15 is attached in a tight manner.

In the illustrated embodiment, the body 10 of the can has a cylindrical shape, the upper portion of the body 10 being frustoconical and having an outer diameter substantially smaller than the outer diameter of the body 10. It is understood that the outer diameter of the lid 20 can be at most as great as the outer diameter of the body, or that the outer contour of the lid 20 is included in the contour of the body 10. I want to.

This structural device protects the lid 20 from radial and circumferential impact during shipping and storage operations where cans are placed side by side.

As is known in the art, to ensure that the can is completely closed until the lid 20 is first opened, and also to visually inform the user that the can has not been penetrated. A sealing film 30 of metallized foil, usually aluminum, is glued or otherwise attached onto the structural ring 15.

The sealing film 30 is provided with means for easier gripping by the user's fingers, such as radial tabs protruding and folded over the sealing film 30.

This known structure allows the sealing film 30 to be easily and completely removed from the structural ring 15 without the formation of protrusions or cutting edges when the can is first opened.

The lid 20 made of stamped metal foil includes an upper wall 21 having a circular outer shape, a peripheral sealing portion 21 a that can be fitted to the upper edge of the main body 10, and a hanging side wall 22. , The depending side wall 22 incorporates an inner shoulder 23 along the entire circumferential extension of the depending side wall 22.

In the illustrated embodiment, the inner shoulders 23 are obtained by deforming the entire circumferential extension of the depending side wall 22, which deformations are circumferentially spaced from each other in the depending side wall 22. May be placed in at least three areas,
In this case, it incorporates three or more inner shoulders, which are obtained by an inward radial deformation of the depending side wall.

Independent of having three or more inner shoulders, the inner shoulders are inactive with the lid open in that they form a single inner circumferential shoulder on the sidewall 22. It is dimensioned to maintain both the condition and the working condition with the lid closed. This working state is such that the lid 20 is fixed in the axially closed state and is accommodated under the seaming bead while keeping the peripheral sealing portion 21a pressed onto the upper edge of the body 10 of the can. , The outer diameter d of the lower edge of the main body 10 of the can is smaller than the outer diameter of the can and is circumscribed on the circumference of a diameter dt smaller than the outer diameter dc of the seaming bead 11.

By forming the lid 20 with a metal foil, the hanging side wall 22 is elastically deformable so that the inner shoulder 23 can be moved on the seaming bead 11 during the opening and reclosing operations of the lid. There is. The shape of the inner shoulder 23 is such that when the lid 20 is closed,
It is possible to keep the peripheral seal 21a of the upper wall 21 pressed against the upper edge of the body 10 of the can.

As shown, the inner shoulder 23 has a generally V-shaped cross section with a rounded apex so that the upper side surface acts as an inclined surface and elastically deforms under the seaming bead 11. The assembly formed by the depending side wall 22, the inner shoulder 23, and the peripheral seal 21a of the lower wall 21 of the lid 20 is provided by the peripheral seal 21.
It acts as an elastic annular clamp that keeps a pressed against the upper edge of the body 10 of the can.

The hanging side wall 22 ensures that the lid 20 is sufficiently axially fixed to the body 10 of the can, while at the same time allowing the user to easily open the lid 20 without the aid of tools.
Made to size to ensure. The lid 20 has a lower free edge of one depending sidewall 22 that curves outward and upward in the finished small ferrule 24 construction.

After first opening the lid and removing the sealing film 30, when closing the lid again,
The peripheral seal 21a of the lid 20 has a certain flexibility to ensure that the can is tightly and firmly closed, and is pressed against the upper edge of the can body 10 when the lid 20 is closed. An annular gasket 40 of any material is provided.

As shown in the drawings, for structural reasons, and also to form a lower groove for housing the annular gasket 40, the peripheral seal is better than the rest of the lower wall 21 of the lid 20. Is also limited to slightly lower height.

[Brief description of drawings]

FIG. 1 is a radial cross-sectional view of the top of a can with an open and disassembled lid made in accordance with the present invention.

[Fig. 2]   FIG. 2 is a view similar to FIG. 1, but showing the lid closed in a can.

[Procedure Amendment] Patent Cooperation Treaty Article 19 Amendment Translation Form

[Submission date] January 4, 2001 (2001.1.4)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Contents of correction]

[Claims]

─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor De Masi Tsuma, Huao Vicente             Brazil, Espe, Sao Paulo,             Sae-Pae-01141-010, Rua Robe             Lut Botschille, 332 (72) Inventor Sene, Antonio Roberto             Brazil, Espe, Sao Paulo,             Sae-Pae-01141-010, Rua Robe             Lut Botschille, 332 F term (reference) 3E084 AA02 AA12 AA22 BA03 BA05                       BA06 BA08 BA09 CA01 CB01                       CB02 CB04 CC02 CC03 CC08                       DB13 DC01 FA09 FC09 GA08                       GB08 GB12 GB13 GB17 HA03                       HB01 HD02 KA14 KA15 LA02                       LA06 LA17

Claims (5)

[Claims] 1. A can body (10) is provided with an annular upper edge, from which a structural ring (15) with a sealing film (30) removably mounted on the top is provided from the outside. A closure device for a can, incorporated by a minging bead (11), which is a metallic lid (20) defined by an upper wall (21) provided with a peripheral seal (21a) and a depending side wall (22). ), Said depending side wall (22) has at least one inner shoulder (23), said inner shoulder (23) being the outer diameter (d) of the upper edge of the can.
) And a diameter (d) smaller than the outer diameter (dc) of the seaming bead (11).
The circumference of t) is circumscribed and the inner shoulder (23) is formed to be received under the seaming bead (11), whereby the lid (20) is axially moved to the closed position. Once fixed, the peripheral seal (21a) of the lid (20) is pressed against the upper edge of the body (10) of the can to keep it tightly secured and the hanging side wall (22) has a lid (20). A device characterized in that it is elastically deformable so that the inner shoulder (23) can be moved over the seaming bead (11) during the opening and reclosing operations of. 2. The inner shoulder (23) is obtained by locally deforming circumferentially extending portions of the depending walls (22) spaced apart from each other. The described device. 3. The inner shoulder (23) according to claim 1, characterized in that it is obtained by deforming the entire circumferential extension of the depending side wall (22) of the lid (20). apparatus. 4. Device according to claim 1, characterized in that the inner shoulder (23) exhibits a V-shaped cross section with rounded vertices. 5. A peripheral sealing part (21a) is provided for closing the main body (21a) when the lid (20) is closed.
Device according to claim 1, characterized in that an annular gasket (40) is provided which is pressed against the upper edge of (10).