Rotary press with means for adjusting the positions of printing plates on plate cylinders
US4207815A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1978 |
| Grant date | Jun 17, 1980 |
| Priority date | — |
| Expiry date | Apr 27, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41P2227/11
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A multiple-color, offset rotary press is disclosed wherein each plate cylinder carries two printing plates, with one of them wrapped around a larger diameter portion of the plate cylinder and the other around a tube slidably fitted over a smaller diameter portion of the cylinder. A shaft secured to the tube and extending coaxially from one end of the plate cylinder, and an axle extending coaxially from the other cylinder end, are mounted on frame means for independent rotary and axial motion. A pair of driven helical gears are mounted respectively on the shaft and the axle for simultaneous rotation therewith but for axial motion relative to same and are meshed respectively with a pair of driving helical gears fixedly mounted on the opposite axles of a corresponding blanket cylinder. The positions of the printing plates are separately adjusted in the circumferential direction by causing axial motion of the driven helical gears, and in the axial direction by causing axial motion of the shaft and the axle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.