Molding apparatus with removable mold cores

Details Molding apparatus with removable mold cores Molding apparatus with removable mold cores

2006-11-14

2006-11-14

Heckenberg, Donald (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For press shaping surface

C425S808000

Reexamination Certificate

active

07134864

ABSTRACT:
A molding apparatus for lenses includes first and second molding units. Each of the first and second molding units has a mold core holder, a plurality of mold cores disposed in the mold core holder, and a plurality of fixing elements. The mold core holder has an abutment surface and a plurality of cavities, each of which includes an open end and a positioning portion. Each fixing element engages removably the positioning portion of a respective cavity, and retains a respective mold core in the respective cavity. Individual removal of the mold cores for replacement is permitted by operating the fixing elements.

REFERENCES:
patent: 2424235 (1947-07-01), Hoffer
patent: 3871611 (1975-03-01), Taketa
patent: 6311967 (2001-11-01), Bickert
patent: 6669460 (2003-12-01), Tai et al.

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