Plate clamping and tensioning apparatus for rotary printing press
US5553545A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1995 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Sep 26, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F27/1231
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A plate clamping system and apparatus for holding a flexible printing plate in position on a rotary printing cylinder. The system includes a plate clamp assembly mounted in a gap in the wall of the rotary printing cylinder for holding the leading edge of the flexible printing plate and a tail clamp assembly mounted in the same longitudinal gap in the cylinder wall for gripping and applying tension to the flexible printing plate to hold it against the surface of the printing cylinder. The plate clamp includes a plurality of individual clamping mechanisms which are air pressure engaged and spring released to hold the leading edge of the flexible plate. The tail clamp assembly includes a plurality of tail clamp mechanisms which are spring applied and air pressure released. The tail clamp mechanisms have a two-stage operation wherein compression springs clamp the tail end of the printing plate and a second set of tension springs moves the mechanism to apply tension on the printing plate. The air cylinders of the clamp assemblies are connected by separate single air pressure lines to a union on the rotary shaft of the printing cylinder with air pressure to the clamping assemblies being …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.