Plate pressure and printing pressure adjusting mechanism for off

Details Plate pressure and printing pressure adjusting mechanism for off Plate pressure and printing pressure adjusting mechanism for off

1986-03-24

1987-06-30

Eickholt, E. H.

Printing

Rolling contact machines

Rotary

101142, B30B 1532

Patent

active

046761586

ABSTRACT:
A plate pressure and printing pressure adjusting mechanism for permitting separate adjustment of the pressure exerted by a rubber blanket cylinder against a plate cylinder and the same rubber blanket cylinder against an impression cylinder. First and second toggle mechanisms are mounted for reciprocation to opposite sides of the axis of rotation of the rubber blanket cylinder and in similar directions to bring the rubber blanket cylinder into and out of engagement with the plate cylinder and impression cylinder, respectively. A first arm fixedly mounted on the eccentric shaft supporting the rubber blanket cylinder is connected through the first toggle mechanism to a first adjusting arm pivotably supported on the frame, and supports an axial adjusting screw and being spring biased so as to cause the end of the adjusting screw to bear on a first radial cam whose periphery may be shifted. A second arm is pivotably supported on the frame with one portion coupled through a link to the eccentric metal part supporting the rubber blanket cylinder. The second toggle mechanism links the other portion of the second arm to a second adjusting arm pivotably supported on the frame and carrying a threaded adjustment screw whose threaded end bears on a second rotatably adjustable radial cam and maintained thereagainst by biasing means acting on the second adjusting arm. By rotating the adjusting cams, the first and second toggle mechanisms are individually adjusted to separately vary the plate pressure and printing pressure.

REFERENCES:
patent: 2578700 (1951-12-01), Harrolu et al.
patent: 2909117 (1959-10-01), Crissy
patent: 4458591 (1984-07-01), Guaraldi

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