Rotary suction drum

Details Rotary suction drum Rotary suction drum

1986-02-26

1987-08-18

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Detailed holder for photosensitive paper

355 76, G03B 2760

Patent

active

046873236

ABSTRACT:
A rotary suction drum provided with a number of pores in the drum surface has its inside space divided into multiple sections by partitions, communicating at least one of the drum sections with a source of suction through a duct, the sections also being in communication with each other through apertures provided in the partitions. Valves are provided at the partition apertures for covering the apertures under centrifugal action when the rotary drum is rotated, the covering valve elements being located adjacent to the respective apertures.

REFERENCES:
patent: 2814233 (1957-11-01), Anander
patent: 3359879 (1967-12-01), Hamlin
patent: 3451754 (1969-06-01), Prew
patent: 3521538 (1970-07-01), Escoli
patent: 3677643 (1972-07-01), Sagawa
patent: 3700302 (1972-10-01), Mohon et al.

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