Dot matrix print head
US4618276A · kind A · utility
Inventors
Key dates
| Filing date | Dec 10, 1984 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Dec 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49861
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention involves methods and apparatus relating to the assembly and structure of a dot matrix print head. In the preferred embodiment, the tops of the bobbins, yoke members, and pole pieces are ground flush in a common plane. The common plane is then used as a reference to mount and assembly remaining elements of the print head including the clapper members and backstop for the clapper members. The clapper members are mounted for pivotal movement between first and second positions by a cover member and securing cap. For uniform operation, the pivotal axis are all in the common reference plane on respective bobbin members and the gaps of the clapper members are automatically set to the identical size by intermeshing fingers on the cover and cap members. Additionally, corresponding and abutting surfaces on the bobbins, cover member, and cap member act in concert by the operation of a single screw to properly align, assembly, and adjust the operating parts of the print head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.