Biasable drive for an image scanner carriage
US7477425B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2002 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Dec 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04739
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for scanning an image of media comprises biasing a scanner carriage for movement relative to a platen and releasing the carriage to move relative to the platen, the carriage scanning an image with a scanner head disposed therein. An image scanner comprises a housing, a platen disposed on the housing, a carriage disposed in the housing, the carriage comprising a scanner head adapted for scanning an image, a biasable drive moving the carriage relative to the platen for high-speed scans, and a drive mechanism loading the biasable drive for the high-speed scans and moving the carriage relative to the platen for low-speed scans. An encoder for sensing position of a scanner carriage comprises a grating disposed in a scanner housing, and an optical sensor for sensing the grating during biased movement of a scanner carriage, the sensor providing carriage position information for rastering an image of scanned media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.