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US4004512A Expired / Lapsed US ⏱️ 0.0 years remaining

Sheet transfer drum for printing presses

Assignee: Heidelberger Druckmaschinen AG
•
Filing: 1975-11-13
•
Granted: 1977-01-25
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Expires: 1995-11-13
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Abstract

Abstract Sheet transfer drum for a printing press includes a shaft, a drum body fixed to the shaft, the drum body including a tube segment having two longitudinal edges, and respective guide rings fixed to both ends of the tube segment, the longitudinal edges of the tube segment defining a gap therebetween a gripper assembly is received in the gap and includes a gripper shaft, a row of grippers fixed to the gripper shaft and a vertically adjustable gripper bearing bar cooperating with the row of grippers for gripping a sheet to be transferred by the sheet transfer drum. A bearing is received in the gap for securing the gripper assembly to the shaft. The guide rings are formed with respective slots extending in peripheral direction of the drum body, and threaded fasteners respectively extend through the slots and releasably secure the guide rings to the shaft within the range of the slots.

Inventors

  • 👤 Willi Jeschke

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 07:54
CPC Classifications
B; B41; B41F; B41F21/00; B41F21/10

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 167 words
Sheet transfer drum for a printing press comprising a shaft, a drum body fixed to said shaft, said drum body comprising a tube segment having two ends and two longitudinal edges and respective guide rings fixed to both ends of said tube segment, said longitudinal edges of said tube segment defining a gap therebetween, a gripper assembly received in said gap and comprising, a row of grippers, gripper shaft means for carrying said row of grippers affixed thereto, and a vertically adjustable gripper bearing bar cooperating with said row of grippers for gripping a sheet to be transferred by the sheet transfer drum, bearing means received in said gap for securing said gripper assembly to said shaft, and said guide rings being formed with respective slots extending in peripheral direction of said drum body, and threaded fasteners respectively extending through said slots and releasably securing said guide rings to said shaft, said guide rings being swingably adjustable relative to said shaft within the range of said slots.
Claim 2
Dependent Claim 167 words
Sheet transfer drum for a printing press comprising a shaft, a drum body fixed to said shaft, said drum body comprising a tube segment having two ends and two longitudinal edges and respective guide rings fixed to both ends of said tube segment, said longitudinal edges of said tube segment defining a gap therebetween, a gripper assembly received in said gap and comprising, a row of grippers, gripper shaft means for carrying said row of grippers affixed thereto, and a vertically adjustable gripper bearing bar cooperating with said row of grippers for gripping a sheet to be transferred by the sheet transfer drum, bearing means received in said gap for securing said gripper assembly to said shaft, and said guide rings being formed with respective slots extending in peripheral direction of said drum body, and threaded fasteners respectively extending through said slots and releasably securing said guide rings to said shaft, said guide rings being swingably adjustable relative to said shaft within the range of said slots.
Claim 3
Dependent Claim 63 words
Sheet transfer drum according to claim 1 wherein said gripper bearing bar has a gripper bearing surface, the sheet to be transferred being gripped between said gripper bearing surface and said grippers, and said guide rings are swingably adjustable to a position wherein one of said longitudinal edges of said tube segment overlies said gripper bearing bar nearly to said gripper bearing surface.
Claim 4
Dependent Claim 26 words
Sheet transfer drum according to claim 1 including blanket means for covering said tube segment, and means for clamping said blanket means on said tube segment.

References Cited (Backward Citations)

US3643598A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-01-25 1980-07-26 1981-01-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-01-25 1984-07-26 1985-01-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-01-25 1988-07-26 1989-01-25 $7700.00 Window Closed / Lapsed

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