Method and apparatus for making a mold for duplicating a positiv

Details Method and apparatus for making a mold for duplicating a positiv Method and apparatus for making a mold for duplicating a positiv

1994-09-08

1997-02-04

Davis, Robert

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

249 52, 249 54, 249109, 249112, 249164, 249167, 249170, 264225, 264227, 425175, 425179, B29C 3340, B29C 3922

Patent

active

055994911

ABSTRACT:
An apparatus for making a mold for forming positive models identical to a positive master has upper and lower mold shells having confronting and contiguous rims lying in respective planes. The shells are dimensioned when juxtaposed to spacedly contain the master. A clamp is engageable with the shells generally at the rims to hold the shells together with the plane of their rims spaced apart.

REFERENCES:
patent: 2397168 (1946-03-01), Touceda
patent: 3871803 (1975-03-01), Beattie
patent: 4022419 (1977-05-01), Haker
patent: 4119292 (1978-10-01), Haker
patent: 4962909 (1990-10-01), Kohler
patent: 5281122 (1994-01-01), Langner

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