Reader with special means for transporting cards and badges of variable thicknesses
US4287409A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1979 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Feb 12, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K13/05
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reader for reading encoded data on cards, badges and the like, which cards and badges can be of differing thicknesses, having specially adapted drive roller pairs each comprising a drive roller of a first durometer and a pinch roller of a second durometer, arranged to efficiently capture the badge or card and apply a positive drive force to it. The drive roller is fixed in position and of a relatively high durometer, while the pinch roller is at contact with the drive roller in the absence of a transported card or badge, but is adapted to be displaced against a spring force to accommodate the thickness of the badge or card being read. The efficiency of capture is a function of the relative durometers of the two respective rollers of the drive roller/pinch roller pair, as well as the degree of spring force provided on the pinch roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.