Press plunger having separable press ring

Details Press plunger having separable press ring Press plunger having separable press ring

1989-11-21

1991-02-05

Culver, Horace M.

Package making

Closing packages and filled receptacles

Separate closure applying

53357, 53361, B65B 728, B67B 100, B67B 316, B67B 500

Patent

active

049893947

ABSTRACT:
A radially expansible press plunge comprising two main parts named formation part (1) and expansion part (2) which are movable in relation to each other, and in which the expansion part (2) is arranged to provide an expansion of at least some part (16) of the press plunge when the said main parts (1, 2) are moved together, and in which the expansion part (2) comprises a cup formed expansion body (16), and in which the formation part (1) is designed with a formation surface (12) against which at least parts of the expansion body (16) is adapted to slide when the formation part (1) and the expansion part (2) are moved axially towards each other, and in which the expansion part (2) is materially composed of two different portions, namely an outer press portion (19) for executing the actual radially outwards directed contact pressure of the press plunge and consisting of a wear resistant, temperature resistant and elastic material, and an inner carrier portion (20) of a relatively hard, elastic material, preferably a material having a relatively low coefficient of friction, which carrier portion (20) carries the press portion (19).

REFERENCES:
patent: 808833 (1906-01-01), Golstein
patent: 2085879 (1937-07-01), Trump
patent: 2423965 (1947-07-01), Coyle
patent: 4640733 (1987-02-01), Borgren
patent: 4724654 (1988-02-01), Dahlin et al.

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