All-points addressable dot printer
US4278019A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1979 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | Jul 16, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J9/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An all-points addressable dot printer has rows of sloped parallel anvils on a rotating drum. Alternate rows slope in opposite directions for bi-directional printing with a single row of hammer blades. The blades which are spaced apart, are shifted bi-directionally in synchronism with the scanning motion of the anvils to print dots at all dot line points. A second embodiment has a reciprocating comb bar located between the blades and a print medium. Spring fingers on the comb bar have dot forming protrusions. The spring fingers are uniformly spaced with center spacing equal to the center distances between the blades. Comb bar motion is linear with time along the line segments. Blade motion is simple harmonic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.