Sheet feeder for digitizing scanner
US6105954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1997 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Oct 15, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S271/902
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sheet feeding mechanism for a digitizing scanner particularly adapted to feed transparent and translucent film sheets provides two pairs of feed rollers each located on an opposing side of the scanner camera's image line. A tray for supporting a feed stack is provided. The tray pivots into and out of engagement with a pick roll at predetermined times during the feed cycle. The pick roll rotates to feed the top sheet of the stack into the feed rollers. The top sheet must climb a curved stripper that resists downstream movement of the next sheets in the stack. A pair of edge sensors are located upstream of the upstream feed rollers and downstream of the downstream feed rollers. The sensors sense, respectively, the trail edge and the lead edge of the sheet, respectively and enable a central processing unit to automatically determine the length of the sheet. The sheet can, thereby, be reversed and scanned fully over its entire length. The sheet can be reversed and rescanned based upon the CPU's information about the sheet's length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.