Method and device for automatically developing photosensitive ma

Details Method and device for automatically developing photosensitive ma Method and device for automatically developing photosensitive ma

1983-06-15

1986-07-15

Mathews, A. A.

354320, G03D 308

Patent

active

046002871

ABSTRACT:
Disclosed are method and device for automatically controlling the time period of photographic development for each specific combination of a photographic developer and a photosensitive material for the purpose of obtaining a substantially same or optimum photographic development result at various temperatures. Through utilization of the knowledge of a certain relation between the time period of photographic development and the temperature of the photographic developer which will produce a same photographic development result, the time period of photographic development is adjusted, for instance, by changing the speed of a conveyor carrying the photosensitive material through the photographic developer. The mentioned relationship may not be always expressed by a linear function with a desired accuracy but may be approximated with a desired accuracy by means of various mathematical functions such as polynomials and irrational functions.

REFERENCES:
patent: 4081211 (1978-03-01), Shigeta et al.
patent: 4153363 (1979-05-01), Albano
patent: 4240737 (1980-12-01), Lawson
John, D. H. O. et al., Photographic Chemistry, Reinhold Publishing Corporation, N.Y. 1963, "Temperature", pp. 118-121.
Pittaro, Ernest, Photo-Lab-Index Lifetime Edition, Morgan and Morgan, Inc. N.Y. 1976, pp. EK-3-94 and EK-3-95.

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