Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – Means permitting removal or substitution of elements during...
Reexamination Certificate
2005-03-15
2005-03-15
Heitbrink, Tim (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
Means permitting removal or substitution of elements during...
C425S190000, C425S19200R
Reexamination Certificate
active
06866497
ABSTRACT:
A molding apparatus includes a first die having an exterior forming surface and a second die. When the apparatus is closed, the first and second dies define a cavity. A bulge projects from the exterior forming surface of the first die toward the second die. A core receiving section, or a recess, is formed in the second die. When forming a through hole in a molded product, a first core is provided in the core receiving section. The first core contacts the bulge when the molding apparatus is closed. When a groove is formed on an exterior surface of a molded product by the bulge of the exterior forming surface, a second core is provided in the core receiving position. The second core is separated from the exterior forming surface when the apparatus is closed.
REFERENCES:
patent: 2424522 (1947-07-01), Wasserman
patent: 2566817 (1951-09-01), Yellin
patent: 4202235 (1980-05-01), Namiki et al.
patent: 0 168 992 (1986-01-01), None
patent: 61202808 (1986-09-01), None
patent: 01206013 (1989-08-01), None
patent: 56-144918 (1981-11-01), None
Heitbrink Tim
Kabushiki Kaisha Tokai Rika Denki Seisakusho
Patterson Thuente Skaar & Christensen P.A.
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