Printing apparatus
US5549402A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1994 |
| Grant date | Aug 27, 1996 |
| Priority date | — |
| Expiry date | Feb 24, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2553/51
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A follower roller 100 adapted to be rotated while coming in contact with a recording medium 120 is rotatably mounted on a driving roller shaft 114 of a driving roller 113, i.e., one of an opposing pair of driving rollers 111 and 113, and a rotation detector 115 for detecting the rotation of the follower roller 100 is disposed in the vicinity of the driving roller 113. A controller detects a malfunction of paper clogging by comparing the detection signal outputted from the rotation detector 115 with the driving signal outputted from the controller for rotationally driving a paper feeding motor. The follower roller 100 includes a ring-shaped magnet 121 including a plurality of magnet segments which are alternately magnetized in such a manner that adjacent magnet segments exhibit different magnetic poles with a radially extending boundary line as a boundary therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.