Expandable type lid welding piston

Details Expandable type lid welding piston Expandable type lid welding piston

1987-05-21

1988-02-16

Culver, Horace M.

Package making

Closing packages and filled receptacles

Separate closure applying

53357, 53361, 53362, 29238, B67B 500, B65B 728

Patent

active

047246545

ABSTRACT:
A plunger (4) for joining an inner workpiece (7) to an outer tubular workpiece (2) is disclosed. The plunger includes an expansion element (9) which engages the inner workpiece and crimps it to the outer workpiece. The expansion element (9) is an annular cup-shaped resilient element which is mounted on a part (21) which is movable relative to a body (8) and to a bottom plate (16). The body (8) and its bottom plate (16) are provided with guide surfaces which are spaced apart to provide a space through which the expansion element may pass upon movement of member 21. The guide surfaces constrain the resilient expansion element to move into pressure applying engagement with the inner workpiece.

REFERENCES:
patent: 2254577 (1941-09-01), Nelson
patent: 2364380 (1944-12-01), Marek
patent: 2423965 (1947-07-01), Coyle
patent: 2685997 (1954-08-01), Quillinan
patent: 2703952 (1955-03-01), Perriguey
patent: 2835093 (1958-05-01), Ford et al.
patent: 2950590 (1960-08-01), O'Brien et al.
patent: 3961463 (1976-06-01), Dimond et al.
patent: 4599123 (1986-07-01), Christensson
patent: 4640733 (1987-02-01), Bogren

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