Paper container bottom expander

Details Paper container bottom expander Paper container bottom expander

1984-01-06

1986-02-18

Crane, Daniel C.

Manufacturing container or tube from paper; or other manufacturi

Container making

Rigid container

493158, 493474, 72400, 279 2R, B31B 190, B31B 128

Patent

active

045712336

ABSTRACT:
A bottom expander for a flat bottom paper container of noncircular cross-section comprises a ring having an aperture surface for closely embracing the bottom rim of a container and plate-like tool elements, each having a radially outer edge surface which opposes and clampingly cooperates with that aperture surface. Each tool element is fastened to the front end of a leaf spring, the rear end of which is anchored in fixed relation to a support for the ring. The leaf springs support the tool elements in coplanar relation and so flex as to confine the tool elements to translatory motion that carries their outer edge surfaces toward and from the aperture surface, thus eliminating sliding guidance for the tool elements. The leaf springs also bias the tool elements to home positions in which they are spaced from the aperture surface.

REFERENCES:
patent: 1186466 (1916-06-01), Brown
patent: 1853192 (1932-04-01), Benke
patent: 2703952 (1955-03-01), Perriguey
patent: 2911890 (1959-11-01), Miller
patent: 3542383 (1970-11-01), Farley et al.
patent: 3704837 (1972-12-01), Heinz et al.
patent: 4000708 (1977-01-01), Hardt

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