Offset mold twinning

Details Offset mold twinning Offset mold twinning

2006-11-01

2010-10-05

Huson, Monica A (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Dividing work to form plural articles

C264S157000, C264S161000, C264S297800, C264S319000, C425S504000

Reexamination Certificate

active

07807080

ABSTRACT:
Thermoplastic parts are made of predominantly single unit thickness but with marginal areas of increased thickness by molding two parts in a common mold having overlapping mold portions. Two thicknesses of thermoplastic material are molded together in the areas of increased thickness at opposite ends of the common mold and the parts are separated from one another by trimming such that each part has an area of increased solid wall thickness and an area of reduced thickness.

REFERENCES:
patent: 3954923 (1976-05-01), Valyi
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patent: 5624630 (1997-04-01), Breezer et al.
patent: 5635129 (1997-06-01), Breezer et al.
patent: 5885691 (1999-03-01), Breezer et al.
patent: 6408796 (2002-06-01), Hampel
patent: 2004/0197547 (2004-10-01), Bristow et al.

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