Method and apparatus for manufacturing synthetic resin bags havi

Details Method and apparatus for manufacturing synthetic resin bags havi Method and apparatus for manufacturing synthetic resin bags havi

1975-09-30

1976-11-23

Drummond, Douglas J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156251, 264 95, 264209, B32B 3102

Patent

active

RE0290432

ABSTRACT:
A method and apparatus for continuously extruding a closed plastic tube with complementary releasably interlocking shaped rib and groove elements on the inner surface of the tube material and extending therealong with the plastic tubing being cooled closely following the extruding and thereafter while advancing the tube from the extruder forcing together the rib and groove elements into an interlocking position, the tubing being then passed through delivery rolls which operate at a predetermined speed, bags being cut from the tubing and heat sealed, and the bags being fed onto a conveyor belt whose rate of delivery is greater than that of the delivery rolls, with the cut edges of the bags being then pressed between a pressure plate and conveyor belt.

REFERENCES:
patent: 2144755 (1939-01-01), Freedman
patent: 2564093 (1951-08-01), Bijl
patent: 2746502 (1956-05-01), Graell
patent: 2750631 (1956-06-01), Johnson
patent: 2978748 (1961-04-01), McCauley et al.
patent: 3038205 (1962-06-01), Plummer

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