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Wire Print Element Actuator

IP.com Disclosure Number: IPCOM000060703D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Thorne, WD: AUTHOR

Abstract

Each print wire in the print head of a printer is moved by an electromagnetic actuator which includes a stator with pole faces defining gaps and a slider which is formed with armature members which cooperate with the gaps. When a coil on the stator is energized, the armature members tend to move into the gaps and cause the slider to operate the print wire. The arrangement is illustrated diagrammatically in the figure, which is a side view of a print head assembly cross-sectioned on its longitudinal axis. The print head assembly includes a conical core 1 around the periphery of which are mounted a plurality of electromagnetic actuators 2.

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Wire Print Element Actuator

Each print wire in the print head of a printer is moved by an electromagnetic actuator which includes a stator with pole faces defining gaps and a slider which is formed with armature members which cooperate with the gaps. When a coil on the stator is energized, the armature members tend to move into the gaps and cause the slider to operate the print wire. The arrangement is illustrated diagrammatically in the figure, which is a side view of a print head assembly cross-sectioned on its longitudinal axis. The print head assembly includes a conical core 1 around the periphery of which are mounted a plurality of electromagnetic actuators 2. Each actuator is associated with a respective print wire 3 which is located in guides 4 on the outer surface of the cone 5 so that at the end 6 of the cone the ends of all the wires 4 are arranged as required, for example, in a straight line. Each actuator 2 consists of a stator 7 formed with three legs 8, 9, 10 spaced as illustrated. On the middle leg 9 is wound a coil 11. Spaced from the ends of the legs is a flux return path member 12 which is attached to the core 1. Between the ends of the legs 8, 9, 10 and the member 12 is a space in which is located a slider 13 one end of which is attached to the print wire 3. The slider 13 is formed with four armature members 14. The legs 8, 9, 10 are formed at their ends with four pole faces 15, and these pole faces cooperate with four raised areas 16 on the su...