Pretensioned jack for controlling the operating pressure between

Details Pretensioned jack for controlling the operating pressure between Pretensioned jack for controlling the operating pressure between

1991-04-23

1993-01-26

Crowder, Clifford D.

Printing

Rolling contact machines

Rotary

92 134, 92 136, 92 138, 100170, 101247, B41F 704, F15B 1500

Patent

active

051814684

ABSTRACT:
A device for controlling the operating pressure between the two rotary cylinders in a machine used for processing layers such as webs, ink films, or the like for instance on an offset printing machine. The device includes a pneumatic jack having an outlet rod of a piston thereof which acts to position each bearing supporting an end of a central shaft of a cylinder. When a chamber of the jack is subjected to pressure, the rod acts against the shift of the bearing in a direction which causes an increase of the distance between the two cylinders. A fixed, though adjustable, arresting piece acts against a shift of the bearing in a direction which would cause a reduction of the distance between the cylinders.

REFERENCES:
patent: 3958493 (1976-05-01), Fujita et al.
patent: 4169405 (1979-10-01), Tsunemoto et al.
patent: 4185879 (1980-01-01), Hars et al.
patent: 4676158 (1987-06-01), Ishii et al.
patent: 4704296 (1987-11-01), Leanna et al.
patent: 4736678 (1988-04-01), Stotz
Hydraulic Pneumatic Power, vol. 17, No. 196, Apr., 1971 "Design Aspects of Hydraulic and Pneumatic Cylinders", by A. E. Constant, FIGS. 7 and 8.
Patent Abstracts of Japan, vol. 7, No. 261, Nov. 19, 1983, "Air Cylinder", Hiroshi Satou.
Patent Abstracts of Japan, vol. 12, No. 201, Jun. 10, 1988 "Pneumatic Cylinder Capable of Altering Double End Stopping Position", Ito Katsujiro.

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