Method for forming patch top container end and closure member assembly
AssigneeBoise Cascade Corporation
InventorsTeddy M. Westphal, Robert J. Hough
Life of this patent
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Abstract
An assembly of a patch top container end and a reusable circumferentially-flanged closure member is disclosed, together with a method for forming the container end and introducing the same within the closure member, characterized in that the container end includes a circumferential tab portion which is folded back through an angle of 180.degree. to a position between the body portion of the container end and the body portion of the closure member. The closure member is then mounted on the open end of a container with the closure member flange extending about the container, the container end being bonded to the extremity of the container end by a temperature or pressure responsive material.
Claims11
The method of forming from a web (2) of sheet material a patch top closure member (6) having body (6b) and tab (6a) portions, and assembling the closure member within a reusable overcap member (20) having a planar body portion (20a) and a continuous circumferential flange portion (20b), which comprises the steps of:
- a. cutting a first portion of the web along a discontinuous line (4) to define the tab portion (6a) of the closure member;
- b. initially bending the tab portion about a fold line (8) through an angle of 90.degree. to a position normal to the web;
- c. subsequently progressively bending the tab portion about said fold line through a further angle of 90.degree. to a reversely bent position in engagement with a first face of a second portion of the web;
- d. severing said second web portion from the web to define the patch top closure member (6), the body portions of said closure and overcap members having congruent circumferential configurations;
- and
- e. introducing the patch top closure member within the overcap member in seated engagement with the body portion thereof, the first face of said closure member facing said overcap body portion and said tab portion being arranged between said first face and said overcap body portion.
The method of forming from a web (2) of sheet material a patch top closure member (6) having body (6b) and tab (6a) portions, and assembling the closure member within a reusable overcap member (20) having a planar body portion (20a) and a continuous circumferential flange portion (20b), which comprises the steps of:
- a. cutting a first portion of the web along a discontinuous line (4) to define the tab portion (6a) of the closure member;
- b. folding the tab portion reversely about a fold line into engagement with a first face of a second portion of the web;
- c. supporting the overcap member with the flange portion thereof adjacent and facing said first face of the second web portion;
- d. severing the second web portion from the web by a reciprocatory cutting tool to define the patch top closure member, said severing being accomplished during an intermediate stage of the working stroke of the tool;
- and
- e. introducing the severed patch top closure member within the overcap member by said reciprocatory tool during the final stage of the working stroke thereof, the first face of said closure member facing said overcap body portion being arranged between said first face and said overcap body portion.
Dependencies are inferred from the claim text.