Printing head assembly
US4600323A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1985 |
| Grant date | Jul 15, 1986 |
| Priority date | — |
| Expiry date | Jan 10, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/28
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing head assembly having a permanent magnet to attract magnetic members such as armatures to store the strain energy in resilient members such as leaf springs, electro-magnets to cancel the magnetic flux generated by the permanent magnets in order to drive the magnetic members, first yokes related to cores of the electro-magnets, and second yokes forming surfaces by the permanent magnet and serving to form fulcrums of rotation of the magnetic members. The permanent magnet is mounted on the first yoke and the second yoke is mounted on the permanent magnet respectively. In order to equalize attracting force by the permanent magnet among a plurality of armature actuating mechanisms and to adjust the height of the surface of the second yoke, with a predetermined height, there is applied a powdery magnetic material mixed into a bonding agent on at least one side of the permanent magnet. This bonding layer can also absorb some errors caused by the production of the first and second yokes and the permanent magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.