Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Reexamination Certificate
2005-03-15
2005-03-15
Davis, Robert B. (Department: 1722)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
C264S349000, C425S562000, C425S574000
Reexamination Certificate
active
06866809
ABSTRACT:
Moulding apparatus is disclosed which comprises transfer element (12) which has a holding cavity (14) therein for receiving a charge of mouldable material. Mouldable material in particulate or molten form is fed into a heated passage (30) by a feed spiral (40) in a tube (36). A plunger (42) displaces molten mouldable material along the passage (30) and into the holding cavity (14). The transfer element (12) is then displaced to a position in which the holding cavity (14) is aligned with an opening (18) in a backing plate (16). The opening (18) is in communication with a mould cavity (20) having the shape of the article to be produced. A second plunger (46) displaces the charge of molten mouldable material from the holding cavity (14) through the opening (18) and into the mould cavity.
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Davis Robert B.
Ladas & Parry LLP
Lomold Corporation NV
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