Apparatus for drying webs of photographic paper or the like

Details Apparatus for drying webs of photographic paper or the like Apparatus for drying webs of photographic paper or the like

1978-07-18

1981-01-20

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

With apparatus using centrifugal force

34 50, 34155, 34159, 34 41, 34 68, F26B 2112

Patent

active

042453976

ABSTRACT:
Apparatus for drying webs of photographic paper has a drying unit which has an inlet for admission of wet webs. Such webs advance along discrete paths having V-shaped portions and are dried by hot air which is circulated by blowers. The temperature of air is maintained at a constant value by a control system which adjusts one or more air heaters in the drying unit. The latter has a portion which is adjacent to and is located at a level below the inlet and wherein the moisture content of air is higher than in other parts of the drying unit. Such moisture content is measured and the signals denoting the measured moisture content are used to control the operation of a device which withdraws moisture-laden air from the aforementioned portion of the drying unit. The withdrawn air is replaced with relatively dry atmospheric air entering the drying unit via outlet opening for the webs.

REFERENCES:
patent: 1996020 (1935-03-01), Hurxthal
patent: 2065070 (1936-12-01), Hanson
patent: 2228030 (1941-01-01), Hanson
patent: 2456301 (1948-12-01), Miller et al.
patent: 3470625 (1969-10-01), Chikamasa et al.
patent: 3533349 (1970-10-01), Schmidt
patent: 3922701 (1975-11-01), Geyken et al.
patent: 4139953 (1979-02-01), Gaskell

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