Wire matrix print head
US4594010A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Apr 23, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/24
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A wire matrix print head is disclosed including a plurality of print wires movable through supporting guides between print and non-print positions, springs urging the print wires toward their non-print positions with separate rigid armatures being movable by respective electromagnetic units from a rest position toward a print position for engaging a respective print wire and driving it toward and into its print position. A housing for supporting and accurately positioning the print wires, armatures and electromagnetic units relative to each other includes multiple portions which are interconnected in spaced apart relation about their peripheries in order to establish and maintain accurate positioning of the armatures relative to the respective electromagnetic units and print wires. While one housing portion supports and positions the electromagnetic units, another housing portion provides a pivot precisely spaced apart from an edge of each electromagnetic unit for capturing and permitting pivotable movement of the armatures therebetween. Each armature is engaged by a resilient bushing adjacent its pivot point, the bushing being slightly compressed in order to permit dampened pivoti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.