Printing press and method
US4643090A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Feb 26, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F13/32
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing press includes an improved method and apparatus for moving printing cylinders between thrown off positions in which bearers connected with the cylinders are separated and thrown on or printing positions. The printing cylinders are urged to their thrown off positions by springs which, in one embodiment of the invention, apply a biasing force to pivotally mounted support arms for the cylinders. In another embodiment of the invention, the cylinders are mounted on cantilevered leaf springs which urge the cylinders toward their thrown off positions. A motor is provided to apply a force directly to one of the printing cylinders to move it from its thrown off position to its printing position. The other printing cylinders are moved from their thrown off positions to their printing positions under the influence of forces transmitted between bearers connected with the printing cylinders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.