Thermal developer for dry silver photographic paper

Details Thermal developer for dry silver photographic paper Thermal developer for dry silver photographic paper

1980-06-04

1982-11-23

Camby, John J.

Heating

Advancing structure flexing, looping or coiling sheet, web...

432 8, F27B 928, F26B 1300

Patent

active

043603408

ABSTRACT:
The drum for passing photographic paper along the surface of a heating trough is reversibly rotatable to maintain a high coefficient of friction between the exterior fibrous surface of the drum and the carrier undersurface of the paper. Drum rotation is reversed in the direction opposite to the transport of paper during periods between successive developments so as to brush the outer tips of the drum fibers against the surface of the trough, deflecting them in the direction of paper transport. The fiber surface of the drum may be set accordingly during manufacture by a grinding wheel rotated oppositely and concurrently with the drum to be finished, but at a much greater speed than the drum. The grinding wheel serves to incline the fiber tips so as to be initially directed in the direction of paper passage along the trough.

REFERENCES:
patent: 3152794 (1964-10-01), Alexeff et al.
patent: 3464680 (1969-09-01), Nakamura et al.
patent: 3782889 (1974-01-01), Panico
patent: 3893245 (1975-07-01), Knechtel et al.
patent: 4212631 (1980-07-01), Franke et al.

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