Electronic typewriter having improved paper and ink feed mechanisms selectively driven by a single reversible motor
US4986677A · kind A · utility
4Cited by
14References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1990 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Mar 16, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J35/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed an output apparatus which prints and outputs onto an ink ribbon in an electronic typewriter or the like. One motor is commonly used for print paper feed, ribbon feed, and ribbon lift up/down operations. The ribbon feed mechanism is controlled by the heteromorphic or noncircular rotary cam having grooves of different kinds of radii. The ink ribbon feed operation and the correction ribbon feed and lift up/down operations are also performed by the rotary cam. With this apparatus, the ink and correction ribbons can be efficiently used and the operation timing of the carriage can be accurately controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.