Cushioning sheet for use in denture casting

Details Cushioning sheet for use in denture casting Cushioning sheet for use in denture casting

1987-10-14

1989-05-02

Seidel, Richard K.

Metal founding

Means to shape metallic material

United particle type shaping surface

164 35, 164246, 164DIG4, 249 54, 249 62, B22C 904

Patent

active

048259349

ABSTRACT:
A cushioning sheet made of a flammable material for use, e.g. in denture casting. It is inserted into a casting frame and adapted to burn out when heated to leave a space between a casting frame and a casting mold in the frame. The space serves to absorb the difference in the thermal expansion between the frame and the mold, thus preventing the casting mold from cracking or breaking. The cushioning sheet is formed with apertures. The casting material penetrates through the apertures, abutting against the casting frame to support the casting mold upon the frame even after the cushioning sheet has burnt out.

REFERENCES:
patent: 4356859 (1982-11-01), Savage
patent: 4531566 (1985-07-01), Boettcher
patent: 4573921 (1986-03-01), Berger

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