Method for trimming rectangular container
AssigneeToyo Seikan Group Holdings, Ltd.
InventorsHiroki Tanaka, Shinichi Miyose
Life of this patent
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Abstract
A method for trimming a rectangular container and an apparatus trimming a rectangular container are provided, by which an appropriate cut surface with a possible crack or burr suppressed can be obtained when a rectangular container is trimmed. When a punch cutter is initially allowed to cut into a rectangular tubular portion of an untrimmed rectangular container, the punch cutter is inclined relative to a thickness direction of a cut area of the rectangular tubular portion, and then, the punch cutter is circumferentially moved along a trim line on the rectangular tubular portion to cut the rectangular tubular portion.
Claims8
A method for trimming a rectangular container, the method comprising:
- initially positioning a punch cutter to cut from an inner peripheral surface to an outer peripheral surface of a rectangular tubular portion of the rectangular container;
- cutting through a wall portion of the rectangular tubular portion at a trim line on the rectangular tubular portion with the punch cutter so as to form an uncut boundary line portion that is inclined relative to a thickness direction of the wall portion;
- and
- then circumferentially moving the punch cutter along the trim line on the rectangular tubular portion to cut the rectangular tubular portion that remains such that the uncut boundary line portion is cut away last.
Dependencies are inferred from the claim text.