Ceramic rollers for conveyance of photographic films and paper p

Details Ceramic rollers for conveyance of photographic films and paper p Ceramic rollers for conveyance of photographic films and paper p

1995-03-13

1996-05-28

Cuda, Irene

Roll or roller

Single annular member, per se

Specific metallic composition

B23P 1500

Patent

active

055206018

ABSTRACT:
A ceramic conveyance roller having a tetragonal phase crystal grain structure includes zirconium oxide and yttria and the molar ratio of yttria to zirconium oxide of from about 3:97 to about 5:95. The outer surface of the ceramic roller has a dimensional tolerance of less than 0.003 inches and the inner surface has a dimensional tolerance of less than 0.0005 inches. The outer surface of the roller can be modified to the cubic phase crystal grain or the monoclinic phase crystal grain.

REFERENCES:
patent: 5290332 (1994-03-01), Chatterjee et al.
patent: 5336282 (1994-08-01), Ghosh et al.
patent: 5358913 (1994-10-01), Chatterjee et al.

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