Sheet transfer device for a printing machine
US5024432A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1989 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Oct 4, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F21/104
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sheet transfer device for a printing machine for taking over sheets which have been aligned at front lays and for transferring the sheets to a sheet-guiding drum includes a pregripper device swivellable between a sheet takeover and a sheet transfer position. Gripper pads are carried by the pregripper device, and a gripper shaft is swivel-mounted in the pregripper device and carries gripper fingers which are associated with the gripper pads. Also provided are a device for connecting the gripper shaft and the gripper fingers so that swivelling movements of the gripper shaft are transmitted to the gripper fingers, and a swivel device for swivelling the gripper shaft about a longitudinal axis thereof. A cam segment has a control surface for controlling the swivel device, and is adjustable so that a gap, formed between the gripper fingers and the gripper pads in the takeover position of the pregripper device and existing until alignment of the sheet at the front lays is terminated, is settable in accordance with the thickness of the sheets. The gap is so defined that the gripper fingers form top lays for a respective leading sheet edge. A control shaft is provided for adjusting the ca…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.