Two step optimized stalled roll registration and deskew
US5775690A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Apr 1, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2513/40
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sheet aligning and registration device for a printing machine. In a stalled roll registration device there is provided a drive mechanism preceding the stalled roll and a sensor to determine the size of a buckle formed in a sheet as it is fed into the registration nip formed by the stalled roll pair. When the buckle reaches a predetermined size the sensor generates a signal which causes the drive controller to briefly pulse the registration roll pair. This brief pulse of the registration roll pair captures the sheet in the nip in a deskewed and registered position for subsequent feeding in a timed relationship to a machine subsystem. A baffle located between the drive nip and registration nip directs the sheet buckle formation in a controlled manner so that proper deskewing and registration forces are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.