Printing – Work supporting members – Grippers
Patent
1975-11-03
1977-05-24
Burr, Edgar S.
Printing
Work supporting members
Grippers
271276, 271277, B41F 130
Patent
active
040248143
ABSTRACT:
A sheet-fed rotary printing press includes a transfer drum assembly includes a rotatable transfer drum having a sheet-supporting peripheral surface, a gripper device carried by the transfer drum for gripping the leading edge portion of a sheet being transferred, and a suction device secured to the transfer drum at the end of the peripheral sheet-supporting surface, as viewed in rotary direction of the transfer drum, for gripping the trailing edge portion of the sheet. The suction device includes a plurality of suckers having suction surfaces disposed in the peripheral surface of the transfer drum and formed with respective suction orifices. The suction surfaces have respective centers and the suction orifices are located eccentrically to the centers, respectively, each of the suction orifices being adjustable so as to apply suction force to a sheet at successively varying locations eccentric to the respective suction surface center for tensioning the sheet in a direction opposite to the rotary direction of the transfer drum.
REFERENCES:
patent: 3096088 (1963-07-01), Young
patent: 3430946 (1969-03-01), Siebke
Burr Edgar S.
Heidelberger Druckmaschinen Aktiengesellschaft
Heinz A.
Lerner Herbert L.
LandOfFree
Transfer drum in sheet-fed rotary printing presses does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transfer drum in sheet-fed rotary printing presses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transfer drum in sheet-fed rotary printing presses will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-529189