Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1986-12-12
1988-03-29
Valentine, Donald R.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204224M, 204225, 20412955, 219 69E, 219 69M, B23H 722, B23H 730, B23H 912
Patent
active
047341734
ABSTRACT:
The present invention relates to a method and an apparatus for the manufacture of dental prostheses by means of an electroerosion process by using two template electrodes for erosive excavation. The dental prosthesis to be inserted is made directly from solid material which has not been previously worked. The negative templates of the dental prosthesis contained in the template electrodes can also be made by the electroerosion method. The manufacture of the dental prosthesis can be accomplished by a simultaneous movement of the two template electrodes or by manufacture of the two form halves of the dental prosthesis at different times.
REFERENCES:
patent: 3356598 (1967-12-01), Cabau
patent: 3393141 (1968-07-01), Trenn et al.
patent: 3689729 (1972-09-01), Neward et al.
patent: 3694610 (1972-09-01), Saito et al.
patent: 3723695 (1973-03-01), Gutnajer
patent: 4363627 (1982-12-01), Windeler
patent: 4627136 (1986-12-01), Kreylos et al.
Gentischer Josef
Korber Erich
Walter Herbert
Valentine Donald R.
Walter Herbert
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