Recorders – Record receivers and/or driving means therefor
Patent
1992-09-04
1993-11-23
Fuller, Benjamin R.
Recorders
Record receivers and/or driving means therefor
346136, 346 76PH, B41J 232
Patent
active
052648737
ABSTRACT:
A continuous tone thermal printing apparatus of the type having a printing station and a receiver drive station. The drive station repeatedly advances receiver back and forth through the printing station in conjunction with the advance of successive thermal transfer donor dye colors on a carrier web through the printing station to successively print the overlying different color image separations. The drive station preferably comprises a motor driven capstan roller mounted to bear against one surface of the receiver and a pinch roller mounted to bear and exert pressure against the other surface of the receiver and to press the receiver against the capstan roller and define a nip therebetween. The capstan roller has a high friction receiver engaging surface and is relatively hard and uncompressible, and the pinch roller has a low friction receiver contacting surface and is relatively soft and compressible, such that when the receiver is within the nip, it is driven in the advance direction by motor driven rotation of the high friction capstan surface, and the interfacial shear stress between each roller and the respective receiver surface in the nip area is minimized.
REFERENCES:
patent: 4502804 (1985-03-01), Willcox
patent: 4642659 (1987-02-01), Nagashima et al.
patent: 4683480 (1987-07-01), Sakamoto et al.
patent: 4710783 (1987-12-01), Caine et al.
patent: 4720714 (1988-01-01), Yukio
patent: 4834277 (1989-05-01), Gomoll et al.
patent: 4957378 (1990-09-01), Shima
patent: 5110227 (1992-05-01), Hatakeyama et al.
The Rolling Contact of Two Elastic-Layer-Covered Cylinders Driving a Loaded Sheet in the Nip by Soong et al, ASME Journal of Applied Mechanics, Dec. 1981, vol. 4, pp. 889-894.
Brearey Robert R.
Fiscella Marcello D.
Pickering James E.
Eastman Kodak Company
Fuller Benjamin R.
Sales Milton S.
Tran Huan
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