Cleaning cards
US8323779B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2004 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | May 16, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24669
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A cleaning card for use in cleaning internal surfaces of a machine-reading mechanism includes a substrate having plurality of discrete raised areas in opposed surfaces thereof. The discrete raised areas each include a peak and a peripheral wall having an edge remote from the peak, and the peak of each raised area is farther from a central plane of the card than the edge of the peripheral wall remote from the peak. Relief means are provided in the substrate for preventing the peaks of at least some of the discrete raised areas from flattening toward the central plane to an extent that such peaks will not effectively engage and clean desired internal surfaces of a machine-reading mechanism when the cleaning card moves in the machine direction in other than a single, substantially linear plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.