Ceramic roller for ESA printing and coating

Details Ceramic roller for ESA printing and coating Ceramic roller for ESA printing and coating

1994-05-03

1997-03-11

Cuda, Irene

Roll or roller

Concentric layered annulus

Specific composition

492 46, 2989532, 427453, 399286, B23P 1500

Patent

active

056095538

ABSTRACT:
An electrostatic assist roller (30) for use in a coating, printing or copying machine includes a cylindrical roller core (35), and a ceramic layer (38) formed by plasma spraying a blend of an insulating ceramic material and a semiconductive ceramic material in a ratio which is selected to control the resistance and thickness of the ceramic layer in response to an applied voltage differential. The semiconductive ceramic layer (38) is sealed with a solid, low viscosity sealer (39), such as Carnauba wax, to protect the ceramic layer (38) from moisture penetration. A second ceramic layer (37) may be used to insulate the semiconductive ceramic layer (38) from the core (35).

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patent: 5322970 (1994-06-01), Behe et al.
patent: 5420395 (1995-05-01), Hyllberg et al.
Plasma-sprayed Coatings -Author/Herbert Herman -from Scientific American/Sep., 1988.

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