Printing – Rolling contact machines – Rotary
Patent
1991-04-24
1992-09-01
Burr, Edgar S.
Printing
Rolling contact machines
Rotary
101247, 101218, 101145, 101DIG36, 101409, B41F 3304
Patent
active
051429810
ABSTRACT:
In a sheet-fed offset press having at least one printing unit in which the blanket cylinder can be thrown on and off the impression cylinder and plate cylinder by a pressure-medium-energized actuating arrangement, the pressure medium energization is triggered by a control unit in accordance with the position of grip edge zones of the cylinders being in registration. In order to ensure that throwing on and throwing off take place when the grip edge zones of the cylinders are positioned immediately opposite one another, the control unit detects the position of the printing unit cylinders relatively to one another by way of an angular position sensor and also detects the actual speed of the press via a speed sensor. The control unit forms speed-dependent throw-on and throw-off actuating times which are advanced in the direction of rotation of the printing unit cylinders so that the reaction time is outside the time slot for grip edge zone registration. The invention reduces the very substantial constructional outlay needed in the case of pressure-medium-energized actuating arrangements to ensure reliable throw-on and throw-off at high printing speeds.
Dettinger Dietrich
Klingler Horst
Burr Edgar S.
MAN Roland Druckmaschinen AG
Raciti Eric P.
LandOfFree
Printing speed dependent throw on/off control system for a sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Printing speed dependent throw on/off control system for a sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Printing speed dependent throw on/off control system for a sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-760992