Bi-directional belt drive, print head mounting means and printing plane adjustment means for serial printers
US4286888A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1978 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Dec 28, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J19/142
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A bidirectional belt-drive for printers and the like comprising a carriage assembly movable across a paper web and supporting a print head mounting bracket. A belt has upper and lower runs extending through guide passageways in the carriage assembly. Independent jam cleat assemblies are normally biased by single spring means to a neutral position so as to be displaced from both runs of the belt. Swingably mounted knurled supporting surfaces cooperate with the jam cleat assemblies to enhance gripping of the fabric belt. Each jam cleat assembly has a pair of cooperating arms whose free ends are arranged to engage one another and extend between the arms of the single torsion spring means. The carriage assembly print head slidably receives the mounting bracket which is urged in the forward direction by bias means and may be adjustably positioned by adjustable cam means to enable the carriage assembly to maintain a fixed position relative to the platen and requiring only movement of the print head mounting bracket. The carriage assembly includes an open frame-shaped casting of a light-weight material significantly reducing inertia as well as the load imposed upon the driving system. Mov…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.