Process of forming a biaxially oriented thermoplastic tube inclu

Details Process of forming a biaxially oriented thermoplastic tube inclu Process of forming a biaxially oriented thermoplastic tube inclu

1986-08-22

1988-04-05

Silbaugh, Jan H.

Sheet metal container making

Method

Assembling receptacle with closure

264150, 264151, 264159, 264532, 264536, 264564, 264567, 264573, B29C 4908, B29C 4914, B29C 4950, B29C 5522

Patent

active

047355387

ABSTRACT:
A process of forming biaxially oriented tubular articles by repeatedly performing a cycle of operations which includes engaging a thermoplastic tube by a first clamping member over a first region at a trailing end of the tube and engaging the tube by a second clamping mechanism over a second region at a spacing from the first region so as to define between the clamping mechanisms a portion of the tube to be longitudinally stretched and radially expanded; moving the clamping mechanisms apart to stretch the tube portion therebetween longitudinally; admitting pressure fluid into the tube portion to expand it radially and form a biaxially oriented bubble adjacent the leading end of the tube, and severing a substantial part, but not all, of the bubble from the tube to form the tube with a radially outwardly flared end as the leading end of the tube for the succeeding cycle of operations.

REFERENCES:
patent: 3311684 (1967-03-01), Heider
patent: 3390426 (1968-07-01), Turner et al.
patent: 3849530 (1974-11-01), Wyeth et al.
patent: 3859408 (1975-01-01), Voss et al.
patent: 3939236 (1976-02-01), Hahn et al.

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