Manufacturing plastic bags

Details Manufacturing plastic bags Manufacturing plastic bags

1982-12-30

1984-11-27

Simmons, David

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

156292, 156293, 383 35, 383 94, 604408, B65D 3316

Patent

active

044849044

ABSTRACT:
In making a plastic bag having a filling pipe, to overcome the difficulty of separating the overlying walls of a flattened tube of plastics material, one wall (11b) of the flattened tube (10) is cut to form a flap (17) and the opposite wall (11a) of the flattened tube is cut to form an opening (14), registering with at least a part of the flap; two pairs of clamping members (22, FIG. 4) engage the flap at the location of the opening and are moved to cause the flap (17) to extend out of the plane of the first wall of the tubing; and the filling pipe (26) is then inserted between the pairs of clamping members (22) and on the inner side of the displaced flap to enter the space between the overlying walls of the tube. Thereafter the walls of the flattened tube are sealed around the filling pipe.

REFERENCES:
patent: 3473532 (1969-10-01), Eisenberg
patent: 4131200 (1978-12-01), Rinfret
patent: 4364478 (1982-12-01), Tuns
patent: 4365629 (1982-12-01), Pert et al.

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