Printer head for serial dot printer
US4368353A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 6, 1981 |
| Grant date | Jan 11, 1983 |
| Priority date | — |
| Expiry date | Mar 6, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/24
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A high operational speed print head for mosaic printing is provided which has a plurality of print needles positioned on a straight line, each being selectively driven toward a piece of paper through an ink ribbon. The printer head comprises a cylindrical permanent magnet ring magnetized in the axial direction; a circular bottom plate covering the bottom of the permanent magnet; and a plurality of electromagnets each having a center core and a coil wound around the core positioned on a circle on said bottom plate so as to be surrounded by the permanent ring magnet. A yoke provides a closed magnetic path with the permanent ring magnet, the bottom plate and each of the electromagnets. A plurality of moving bodies equal in number to the number of electromagnets are provided, each having at least an elongated armature overlying the core of the related electromagnet and composing a part of said closed magnetic path. A leaf spring supports the armature and is fixed to the yoke, and a print needle is mounted perpendicular to the elongated armature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.