Switching mechanism for a paper holding roller of a printer
US4941762A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Jan 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J23/025
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A mechanism for switching a paper holding roller of an automatically feeding printer between a contact position for holding a paper against the platen and a separation position away from the platen utilizing the platen power source. A transmission mechanism includes a trigger which is moved selectively by an electro-magnetic member to engage a gear between the platen power source and a roller lever on which the paper holding roller is mounted to move the paper holding roller between the contact/separation positions. In one embodiment, two partial gears engage a gear portion of the lever to move the lever in both directions. In another embodiment, an epicyclic lever is selectively rotated in one of two directions to engage one of two oppositely rotating epicyclic gears to move the paper holding roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.