Image receiving sheet inversion sensing techniques
US5196868A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1992 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Apr 28, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/1113
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention relates to techniques for ensuring that an image receiving sheet, which has only one major surface thereof coated with an image receiving coating, is properly oriented prior to an image being printed thereon. The image receiving sheet has a concave or convex irregularity (e.g., a notch, arc, etc.) formed in at least one nominally straight edge of the sheet. In a first embodiment, a mechanical or optical sensing means detects whether or not the image receiving sheet is stacked correctly in a loading tray by sensing whether or not the edge irregularities are properly positioned. In a second embodiment, an edge and a notch sensing means detect whether or not the image receiving sheet is oriented properly while being fed into the printer. An improperly loaded image receiving sheet is either not fed into the printer, or transits the printer without causing the printer to attempt to print the image thereon. A visual and/or audible alarm can be activated upon the detection of an improperly loaded image receiving sheet to apprise a printer operator of the improperly loaded sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.