Metal deforming – By application of fluent medium – or energy field
Patent
1978-01-24
1979-07-31
Larson, Lowell A.
Metal deforming
By application of fluent medium, or energy field
72465, 72DIG14, 32 42, B21D 2212
Patent
active
041626257
ABSTRACT:
A method and apparatus for forming dental matrices and copings is disclosed. The apparatus provides a first and a second compression member, each of which is provided with a pliable surface thereon. One of the compression members has a point for the attachment of a conventionally formed tooth die thereto, upon which a sheet of conventional coping material can be placed. The compression members are attachable to a jacking apparatus which imparts relative motion to the two compression members urging them together and compressing the tooth die therebetween the sheet of coping material conforming to the shape of the tooth die itself. In the method of the present invention, the first and second compression members are placed a distance apart, and the tooth die attached to one of the compression members at its pliable surface. The sheet of coping material is then loosely attached to the tooth die, after which the first and second compression members are urged together and compressed so as to cause the pliable surface of each compression member to substantially conform to and abutt the tooth die, putting substantially uniform pressure thereon. The sheet of coping material then substantially conforms to the tooth die forming the desired coping.
REFERENCES:
patent: 906911 (1908-12-01), McCullough
patent: 1012401 (1911-12-01), McCullough
patent: 2422883 (1947-06-01), Bruderlin
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