Sheet turn-over apparatus for sheet-fed rotary printing press
US4823695A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1987 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Nov 12, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F21/106
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a sheet turn-over apparatus for a sheet-fed rotary printing press, the right cams are a turn-over cam for gripper units A and opening/closing cams for gripper units B, while the left cams are a turn-over cam for gripper units B and opening/closing cams for gripper units A. The cams cooperate with the corresponding torsion bars arranged at the pivotal centers of cam levers to turn over and open/close the gripper units A and B. The cams are fixed at predetermined positions of frames and need not be shifted in the single side printing and double side printing. The gripper opening/closing cams need not be shifted in the non-turn-over and turn-over modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.