Bowed shape electroforms

Details Bowed shape electroforms Bowed shape electroforms

1994-12-01

1996-03-19

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electroforming or composition therefor

205 73, C25D 100

Patent

active

055001050

ABSTRACT:
An electroforming process and apparatus for bowing the imaging surface to provide "steering" for moving the electroformed imaging surfaces over rollers or like devices. One embodiment of the present invention is to bow or crown the electroformed imaging surface by using a bimetallic mandrel. The outer material of the mandrel has a greater coefficient of expansion than the inner material. Thus, when the mandrel is heated the outer material expands more than the inner material creating the bowed or crown effect. The electroform takes on the bowed shape during plating and maintains that shape when removed from the mandrel. Another embodiment of the present invention involves mechanically or hydraulically bowing the mandrel and then plating the electroform on the bowed surface. This electroform also maintains the bowed shape when removed from the mandrel.

REFERENCES:
patent: 3763030 (1973-10-01), Zimmer
patent: 3905400 (1975-09-01), Dupree
patent: 3947348 (1976-03-01), Schabernack
patent: 3984183 (1976-10-01), Maksymiak
patent: 4177113 (1979-12-01), Seibt
patent: 4501646 (1985-02-01), Herbert
patent: 4902386 (1990-02-01), Herbert

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