Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1982-06-24
1985-06-04
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264310, 425384, 604408, B29C 1700
Patent
active
045213666
ABSTRACT:
Container bags for intravenous solution of one-piece, blow-molded construction typically have a fill port or tube and at least an administration port in one end of the container bag. A method, an apparatus and an article of manufacture are provided where a fill port or tube on a polyolefin or other plastic container bag is sealed into a dome shape where the solid wall, dome-shaped material closing the port or tube effects the seal. The method provides for sealing the open end of a thermoplastic tube or port by using respectively hot and cold dies. Resistance of the tube or port to forming a seal at adjoining interfaces is overcome by rotating at least one of the dies. Disruption and mixing of the plastic at the interface or closure line is accomplished, forming a substantially homogenous mass which seals the port opening.
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Defensive Publication T913,002, Friction-Welded Bottom Seals on Thermoplastic Bottles, to Carmichael, Published Aug. 14, 1973.
Eckert Hermann F.
Mason Joe
Baxter Travenol Laboratories Inc.
Derrington James
Kmiotek Thomas A.
Price Bradford R. L.
Ryan Daniel D.
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