Serial printer having two carriages carrying respective type wheels and movable independently
US4426167A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1982 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Feb 11, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J1/50
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A serial printer of the type having a carriage carrying a type head and adapted to be column-shifted by a cooperation between a rack and a screw member. The printer comprises a rotary shaft adapted to be driven by a suitable power source, a first and second screw members splined to the rotary shaft, a first and second carriages carrying the first and second screw members, the first and second carriages having home positions defined at both ends of the column-shift, spiral screws formed on the first and second screw members and orientated in the opposite directions, and a rack member having short racks formed on both ends thereof and an intermediate long rack, the long rack being engageable selectively with the first and second screw members by a selection of rotational positions of the two short racks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.