Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1990-09-17
1992-05-19
Terrell, William E.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
83387, 83620, 836391, B31B 2314, B26D 702, B26D 900, B26D 512
Patent
active
051143941
ABSTRACT:
A single, fluid pressure-operated cylinder, which has a conventional slitter blade and punch releasably secured to the lower end of its piston rod, is secured to a plastic bag making machine so that the operating ends of the blade and punch project toward a stationary, horizontal support surface across which overlapping plastic webs pass during bag manufacturing. The webs are secured against movement during a slitting and punching operation by a pressure plate, which is also mounted on the piston rod for movement thereby into engagement with the plastic webs to clamp them against the stationary support surface during the initial advance of the rod. As the rod continues to advance it moves the blade and punch through the now-clamped plastic webs, after which the piston rod is retracted and the parts return to their inoperative positions.
REFERENCES:
patent: 152862 (1874-07-01), Perkins
patent: 703183 (1902-06-01), Chapin
patent: 1817428 (1931-08-01), Takamatsu
patent: 1854516 (1932-04-01), Kirchner
patent: 2643715 (1953-06-01), McClellan
patent: 3368441 (1968-02-01), Piazze
patent: 3802308 (1974-04-01), Davis
patent: 3992966 (1976-11-01), D'Agostino
patent: 4377097 (1983-03-01), Calvano
patent: 4488466 (1984-12-01), Jones
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