Process for producing thermoformed article employing selective c

Details Process for producing thermoformed article employing selective c Process for producing thermoformed article employing selective c

1994-04-11

1996-08-13

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264322, 264550, 425384, 4253871, B29C 5142, B29C 5110

Patent

active

055453708

ABSTRACT:
A process for producing a thermoformed article having a first portion with a first wall thickness, and a second portion with a second wall thickness, the first portion having a thicker wall thickness than the second portion, the process including selectively cooling the first portion during a thermoforming cycle so that thermoformable material from the first portion is prevented from migrating to the second portion.

REFERENCES:
patent: 3527854 (1970-09-01), Martin et al.
patent: 4342183 (1982-08-01), Gordon et al.
patent: 4381279 (1983-04-01), Jakobsen et al.
patent: 4909722 (1990-03-01), Wakayama et al.

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