Method of fitting a top or a bottom to the body of a can and mac

Details Method of fitting a top or a bottom to the body of a can and mac Method of fitting a top or a bottom to the body of a can and mac

1987-07-07

1989-04-11

Schmidt, Frederick R.

Sheet metal container making

Method

Assembling receptacle with closure

413 30, 413 31, B21D 5132

Patent

active

048201006

ABSTRACT:
In a method of fitting a top or a bottom to the body of a can, the top or bottom is placed inside a die having a rolling surface. The top or bottom has an inwardly rolled edge defining a support surface adapted to be substantially mated with at least part of the rolling surface. An end portion of the can body is inserted between this rolling surface and this support surface. Thrust is then applied to the can body until it causes the end portion to roll around and envelop the support surface. The corresponding machine comprises at least one rolling die incorporating a bush defining a first rolling surface facing radially inwards and a plurality of jaws disposed along a perimeter corresponding to the shape of the can. The jaws are movable towards an inside wall of this bush and are shaped to define at least part of a second rolling surface which faces radially outwards. This second rolling surface is adapted to form an extension of the first rolling surface when the jaws are positioned close to the inside wall of the bush.

REFERENCES:
patent: 1598170 (1926-08-01), Stuart et al.
patent: 1615325 (1927-01-01), Cameron
patent: 1636839 (1927-07-01), Schrader
patent: 1679629 (1928-08-01), Rollman
patent: 2281574 (1942-05-01), Gladfelter
patent: 2536055 (1951-01-01), Heinle
patent: 3246622 (1966-04-01), Negoro
patent: 3452897 (1969-07-01), Anthony et al.
patent: 3965834 (1976-06-01), Dolveck
patent: 4241844 (1980-12-01), Dolveck
patent: 4361246 (1982-11-01), Nelson

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