Suction foot reapportioning system and printing press

Details Suction foot reapportioning system and printing press Suction foot reapportioning system and printing press

1997-10-07

1998-10-06

Eickholt, Eugene H.

Printing

Rolling contact machines

Rotary

101238, 271103, 271107, B41F 1324

Patent

active

058161562

ABSTRACT:
A hollow cylinder is fitted with a piston, whose hollow rod or shank protrudes downward from the cylinder to apply lifting suction to print media. The upper end of the cylinder communicates with a suction system. In the cylinder side walls, main passageways and reapportioning passageways apply suction to the underside of the piston when the piston is less than fully extended, drawing the piston down to extend the shank. When the shank is fully extended the piston blocks the reapportioning passageways--reallocating more of the available suction to other feet, in the same system, that remain unextended.

REFERENCES:
patent: 2341521 (1944-02-01), Baker
patent: 3956985 (1976-05-01), Ishii
patent: 4118024 (1978-10-01), Gerhardt
patent: 4580773 (1986-04-01), Minkle

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