Automatic paper feed device
US4928951A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1988 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Oct 24, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2404/56
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An automatic paper feed device includes a first paper feed roller rotating in pressing contact with the upper surface of a sheet stack for feeding upper sheets from the sheet stack by its rotation in a counterclockwise direction, a second paper feed roller located downstream of the first paper feed roller with respect to the paper feeding direction and rotating in a counterclockwise direction for feeding only an uppermost sheet of the sheets fed by the first paper feed roller, a separating roller rotating in a direction opposed to the paper feeding direction while being held in pressing contact with the second paper feed roller for returning the sheets other than the uppermost sheet toward the sheet stack, a first frame rotatably supporting said first paper feed roller and a second frame rotatably supporting said separating roller, a paper feed unit pivotably supported so as to be pivotable in upward and downward directions so that the first paper feed roller descends to a level corresponding to the height of the sheet stack while being held in pressing contact with the upper surface of the sheet stack, and a guide associated with the first and second frames for guiding the copying…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.