Automatic original document feeder for electrophotographic copier
US4420149A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1981 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | May 20, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/602
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A document feeder for advancing original documents to the exposure platen of an electrophotographic copier which is capable of operating in either a semiautomatic or fully automatic mode. In the semiautomatic mode, an original to be copied is manually inserted face up into an inlet where it is engaged by the semiautomatic transport assembly inverted and advances to a proper position for copying. After exposure the document is again inverted and guided into a receiving tray overlying the platen. In the automatic mode of operation, a second tray normally maintained in an inoperative position is swung down to a position at which its feed end is adjacent the feeder inlet. Documents to be copied are placed face up as a stack in the second tray, and feed rollers carried by the tray are actuated to advance documents individually from the stack to the inlet. In a preferred embodiment, a driven feed roller is disposed below the retarding roller at a fixed spacing therefrom to feed sheets from the bottom of the stack so that the sheets are collected in the stacking tray in their original order. In the same embodiment, a guide strip having fingers extending between the feed roller and reduced…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.