Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Reexamination Certificate
2011-07-05
2011-07-05
Heitbrink, Jill L (Department: 1743)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
C264S255000, C264S328700
Reexamination Certificate
active
07972544
ABSTRACT:
While a second layer resin is being charged, a movable platen is moved backward to reach a given movable platen position (S1) to enlarge the capacity of a second cavity. After the completion of charging of the resin, a toggle mechanism is promptly driven to reduce the second cavity capacity to reach a given movable platen position (S2), and after the lapse of a given time, the toggle mechanism is driven again to enlarge the second cavity capacity to reach a given movable platen position (S3). Thus, a high quality multilayer injection molded article which has small variations in the wall thickness, dimension, and mass and which is free from deformation or warpage can be stable obtained.
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Miyamoto Kazuaki
Okamoto Akio
Edwards Angell Palmer & & Dodge LLP
Heitbrink Jill L
Ube Machinery Corporation, Ltd.
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