Method of fabricating a biasing plate spring for a wire-dot print head
US4979277A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1989 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Oct 26, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49799
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a method of fabricating a biasing plate spring for a wire dot print head having an annular part and a plurality of projections extending radially inward from the inner periphery of the annular part, a biasing plate spring intermediate product having two of the projections substantially opposite to each other and connected by an arm, is first formed. The intermediate product is then barrel-polished, and then the arm is removed by cutting. Because of the arm, entry of one intermediate product into the gap between adjacent projections of another intermediate product is prevented, and damage to the intermediate product is thereby avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.