Controlled air flow in a prefuser transport
US5461467A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1994 |
| Grant date | Oct 24, 1995 |
| Priority date | — |
| Expiry date | Jul 25, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00413
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus for advancing a copy sheet includes a moving imaging member having an unfused toner image. The copy sheet is in contact with the moving imaging member to transfer the toner image from the imaging member to the copy sheet. The copy sheet is then engaged by a moving sheet transport. A vacuum draws the copy sheet toward the sheet transport while a pressure sensor detects the vacuum pressure in the transport to control the air flow through the transport so as to maintain a low and constant drive force in response to the level of vacuum sensed by the sensor. The low drive force exerted on the sheet is lower than a holding force of the sheet to the moving imaging member thus causing the sheet to slide on the transport.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.