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18/24-Pin Wire Matrix Print Head With Moving Coil Actuator

IP.com Disclosure Number: IPCOM000057657D
Original Publication Date: 1988-Jun-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Chang, SH Chen, SC Wang, HC [+details]

Abstract

A pin wire matrix print head for a high-speed high resolution wire matrix impact printer is disclosed and comprises: a housing; and a plurality (preferably eighteen or twenty-four) of moving coil actuator units, with each moving coil actuator unit having a lightweight armature with a cut-out interior with the armature being connected to the housing by a flexural support; a flat actuator coil disposed inside of and integral with the armature and having electrical leads for connecting with a current source, a print wire connected in a generally perpendicular fashion to the armature, and two high energy product permanent magnets aligned with the face of the coil and adjacent the armature with the magnets oriented in reversed polarization directions so as to provide two reversed magnetic flux paths through the actuator coil.