Sheet winding detecting device and image forming apparatus
US6744993B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Apr 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00548
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An image forming apparatus is provided which is capable of reliably preventing a recording sheet wound around a roller member from being further wound around the roller member even when the power supply of the image forming apparatus is turned on/off while the recording sheet is wound around the roller member. A high voltage power supply section applies voltage to feeding brushes disposed in contact with the surface of a pressurizing roller having an electrically conductive surface. A winding sensor is disposed in contact with the surface of the pressurizing roller and is located in a sheet passing area of the pressurizing roller. A CPU provides control such that the pressurizing roller is inhibited from being driven when it determines that the recording sheet is caught between the pressurizing roller and the winding sensor according the result of comparison between the output voltage from the winding sensor and detected voltage of the feeding brushes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.