Sheet size detecting apparatus
US8838011B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2012 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Sep 10, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J11/003
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An image forming apparatus has a sheet size detecting unit with first and second arms each moved by contact with a moving sheet, the arms disposed at differing locations in a direction orthogonal to sheet movement. An actuator which acts on the sensor is not moved when only one arm is moved by sheet contact, but is moved when both arms are moved by sheet contact so that the sensor output level when only one arm is moved is the same as when neither arm is moved, and the output level of the sensor when both of arms have moved differs from when neither arm moves. The first and second arms have first and second regulating portions, respectively, for regulating actuator movement, and the actuator is moved only when both regulating portions are moved from contact of both arms with the moving sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.