Media thickness compensation for print head
US3935936A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1974 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Mar 1, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J25/308
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In high-speed serial-type wire printer with platen for backing impression-receiving media and carriage for traversing print head having printing wires reciprocable at right angles to platen to effect impressions against media along a print line on platen; a print head mounted on the carriage for independent movement perpendicular to print line, biasing means urging print head away from platen, and a plurality of individually selected rotatable stop members on a shaft in a series extending for length of platen, the shaft being carried by adjustable bearings to insure its being axially parallel to platen, with each stop member comprising polyhedron presenting plurality of peripheral faces each differently spaced from shaft, and a roller on print head for engagement with stop member faces by the biasing means, the print head thereby being maintained a predetermined distance from the media during traversing of carriage regardless of the thickness of the media so as to accommodate media of different thicknesses. A pair of secondary rollers on carriage equidistantly spaced transversely on opposite sides of roller on print head are resiliently maintained in engagement with a rail on machi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.