Apparatus for and method of obtaining improved dental castings

Details Apparatus for and method of obtaining improved dental castings Apparatus for and method of obtaining improved dental castings

1982-06-04

1985-04-02

Godici, Nicholas P.

Metal founding

Process

Shaping a forming surface

164237, 164244, 164376, 164377, B22C 702, B22C 904, B22C 2100

Patent

active

045081557

ABSTRACT:
The apparatus comprises an expandable investment ring having a removable base. Formed on the top surface of the base, and within the void defined by the ring, is an indexed sprue former. A curved runner bar having an indexed coping is formed at one end thereof in mating relation to the sprue former. By virtue of this apparatus extremely accurate base metal castings may be obtained. The apparatus is also useful for preparing precious metal castings.

REFERENCES:
patent: 539209 (1895-05-01), Adams
patent: 1804401 (1931-05-01), Davis
patent: 1970261 (1934-08-01), Turner
patent: 2193357 (1940-03-01), Greth
patent: 2195960 (1940-04-01), Morris
patent: 2267329 (1941-12-01), Fowler et al.
patent: 3985178 (1976-10-01), Cooper
patent: 4081019 (1978-03-01), Kulig
patent: 4161208 (1979-07-01), Cooper

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