Plastic article or earthenware shaping or treating: apparatus – With means adjusting synchronization or compensating for wear
Reexamination Certificate
2011-07-05
2011-07-05
Mackey, James (Department: 1744)
Plastic article or earthenware shaping or treating: apparatus
With means adjusting synchronization or compensating for wear
C425S19200R, C425S468000
Reexamination Certificate
active
07972127
ABSTRACT:
A wedge-lock system for injection molds, using a protrusion on one side of the mold and a mating opening and sets of wedges which act together upon mold closing to provide and maintain accurate centering of the core and cavity halves in reference to each other, to prevent core shifts and compensate for uneven thermal expansion of mold components.
REFERENCES:
patent: 3930780 (1976-01-01), Lovejoy
patent: 3932085 (1976-01-01), Horbach
patent: 3942755 (1976-03-01), Robinson
patent: 4733801 (1988-03-01), Scammell
patent: 4775130 (1988-10-01), Von Holdt
patent: 4856977 (1989-08-01), Von Holdt
patent: 5776517 (1998-07-01), Ciccone et al.
patent: 2002036296 (2002-02-01), None
Hodgson & Russ LLP
Mackey James
Top Grade Molds Ltd.
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