Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1977-01-17
1978-07-04
Hoag, Willard E.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264333, B28B 302, B29D 300
Patent
active
040988635
ABSTRACT:
A method for making a mounting ring for securing dental casts to the base and bow members of an articulator is cast of dental stone or plaster to provide a strong molecular bond as well as the conventional mechanical bond to the plaster dental casts. The mounting ring is readily cast as needed in the dental laboratory using a two-piece mold having a piston with a diameter corresponding to the diameter of the ring and a cylindrical mating resilient base section containing the desired ring pattern and also a vertical post upon which a threaded metal nut may be supported. When appropriately loaded with the nut and the ring material in its liquid state, the base and piston are compressed by hand pressure to form the mounting ring while extruding excess liquid plaster from the space separating the wall of the resilient base and the piston. The threaded metal nut firmly cast in the mounting ring may then be used to secure a dental cast to the articulator.
REFERENCES:
patent: 2941830 (1960-06-01), Burke
patent: 2979775 (1961-04-01), White
Castle Linval B.
Hoag Willard E.
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