Apparatus and method for controlling drag roller
US6293453A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1999 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | May 6, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2515/40
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus for and a method of controlling a drag roller in a printing machine to move a web with no shift of a printing position and enhance the printing quality remarkably, even when the drag roller varies in diameter due to its temperature change. From a given temperature-rotational-speed table, a controlling unit obtains a rotational speed of the drag roller so as to adjust a circumferential speed of the drag roller, which speed corresponds to the current circumferential surface temperature checked by a temperature monitor unit. Then, a rotational speed changing unit changes the rotational speed of the drag roller to a value equivalent to the rotational speed obtained by the controlling unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.