Offset duplicating machine
US4228735A · kind A · utility
Inventor
Key dates
| Filing date | Jun 19, 1978 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Jun 19, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9408
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In an offset duplicating machine, an implement for marking, such as perforating, slitting, scoring or the like, each printed sheet conveyed through the machine; for transverse marking, a first marking strip is affixed lengthwise on an impression cylinder and a rotatable counter-roller is mounted adjacent and at a skew inclination to the impression cylinder; the counter-roller has an outer surface of hyperboloidal shape which allows the strip to progressively mark the passing sheet. By grooving the counter-roller or by varying the distance separating it from the impression cylinder, additional marking strips may be affixed to the impression cylinder to provide various marking configurations on the printed sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.