Print drive medium for line/series printers
US4417825A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1983 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Apr 7, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J11/48
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An improved print medium driving mechanism for a line or serial printer adapted for advancing either individual cut sheets or a continuous web having regularly spaced perforations preformed along its edges. The driving mechanism operates in either a friction drive mode or a spur drive mode. In friction drive mode, print medium inserted into the mechanism, is guided to a driven friction feed roller. The medium is then clamped between the feed roller and a plurality of pressure rollers. Driven by the feed roller, the medium is advanced and guided around that roller and then between immediately adjacent surfaces of a printhead and a platen. If cut sheets are being driven, they are inserted between lateral guides adjusted to the width of the sheet. Such sheets, after being advanced past the platen, contact a deflector surface of a cover which guides them into a second clamping, driven engagement in a friction feed assembly. Alternatively, perforated, preformed continuous web printing medium may be mated along its edges to spur drive members. Such printing medium engages the spur drive members both upon entering into and departing from its path around the feed roller. With the continuou…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.