Gusset tubing former

Details Gusset tubing former Gusset tubing former

1989-07-03

1991-01-22

Terrell, William E.

Manufacturing container or tube from paper; or other manufacturi

Tool or tool support

493248, 493295, 493302, 493439, B31B 140, B65H 4508

Patent

active

049868063

ABSTRACT:
A gusseted tubing former designed to be incorporated in a bag manufacturing line, preferably for manufacturing paper bags from a continuous paper web. The web is formed around the periphery of the former to produce a continuous tubing. As the tubing moves along the former in the manufacturing line, it emerges in the form of a flat tubing which includes two inwardly directed gussets, or folds. To prevent transverse stresses on the web during the formation of the gussets, the former includes edges which longitudinally extend in a direction which follows the folding lines of the gussets of the tubing as the tubing is progressively flattened from an upstream end to a downstream end of the former.

REFERENCES:
patent: 407813 (1889-07-01), Burdick
patent: 2631332 (1953-03-01), Reber
patent: 3111310 (1963-11-01), Dutro et al.
patent: 3408903 (1968-11-01), Lepisto et al.
patent: 3976418 (1976-08-01), Leathers
patent: 4321051 (1982-03-01), Hajek et al.
patent: 4578051 (1986-03-01), Everman
patent: 4591354 (1986-05-01), Gelbard
patent: 4648861 (1987-03-01), Pierce

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