Patent ID: 6038976
Filing Date: 2000-03-21
Classification: B41F,B65H,Y10S

Abstract:
In a suction-air control device for controlling suction air applied to suction openings of a printing-press cylinder receiving printing substrates having various formats, the improvement comprising:a suction air source;a control air source;at least one pneumatically controllable valve disposed on the printing-press cylinder connecting the suction openings of the printing-press cylinder to said suction-air source and having a pneumatically adjustable actuating element connected to said control air source;a first pneumatic control device for timed or cyclically feeding the suction air from the suction air source;a second pneumatic control device connected to said control air source, to said at least one pneumatically controllable valve and to said pneumatically adjustable actuating element, for controlling said at least one pneumatically controllable valve, for pneumatically adjusting said actuating element with the control air from said control air source, and for controlling the suction air from the suction air source dependent upon the format of the printing substrate.