Adjusting device for printing plates

Details Adjusting device for printing plates Adjusting device for printing plates

1997-08-29

1999-03-02

Yan, Ren

Printing

Flexible-sheet-securing devices

B41F 128

Patent

active

058757180

ABSTRACT:
An device for adjusting the tension applied on a printing plate on a plate cylinder of a sheet fed offset printing machine is provided. The device includes a clamping bar comprising at least one clamping bar section and having a clamping gap which receives an end of the printing plate. Moreover, the clamping bar is arranged so that it can move approximately in the circumferential direction of the plate cylinder. The device further includes a spring element which acts on the clamping bar so as to apply a tensile force on the printing plate. The device also includes an adjusting element pivotally supported on the cylinder such that it can be pivoted counter to the force of a spring from a disengaged position into engagement with the clamping bar in order to selectively reduce the tensile forces exerted on the printing plate by the spring element.

REFERENCES:
patent: 4813356 (1989-03-01), Abendroth et al.
patent: 5181469 (1993-01-01), Merkel et al.
patent: 5325778 (1994-07-01), Hartung et al.
patent: 5339738 (1994-08-01), Blaser et al.
patent: 5367954 (1994-11-01), Becker
patent: 5542657 (1996-08-01), Kemmerer et al.
patent: 5694854 (1997-12-01), Becker

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