Title:
ROTARY PRESS FOR ROLL OF NEWSPRINT
Document Type and Number:
Japanese Patent JPS57199662
Kind Code:
A
Abstract:
To permit compensation and guidance for different paths (A, B) of a paper web through a printing machine, for example, selectively, for offset lithographic printing, di-lithographic printing, or flexo printing, a paper deflection roller is positionable between two base or fixed positions (A, B) in dependence on the selected printing mode and hence paper path, and, additionally, in a superimposed movement, deflectable to control the paper tension between adjacent printing stations (1, 2, 3, 4) so that tension between printing stations of the web can be individually controlled and maintained at a suitable level, applicable also to low-strength paper, such as recycled paper. Positioning of the deflection roller for different modes of operation can be carried out, for example, by shifting the position of the deflection roller by means of a stepping motor; fine positioning of the deflection roller to compensate for paper tension can be accomplished, for example, by additionally stepping the stepping motor through only few steps in comparison to change of base position, or by an additional piston-cylinder assembly, moving the deflection roller in accordance with preprogrammed or predetermined stop positions selected, by experience, based on the particular type and characteristics of the paper used and the printing mode.
Inventors:
HERUMAN FUITSUSHIYAA
Application Number:
JP8030882A
Publication Date:
December 07, 1982
Filing Date:
May 14, 1982
Export Citation:
Assignee:
ROLAND MAN DRUCKMASCH
International Classes:
B41F11/00; B41F13/02; B41F13/12; B65H23/188; B41F5/24; (IPC1-7): B41F5/24; B41F11/00; B41F13/02; B41F13/12; B65H25/22