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Matrix Print Head Wire Length Adjustment Technique

IP.com Disclosure Number: IPCOM000046486D
Original Publication Date: 1983-Jul-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Harris, RH: AUTHOR

Abstract

Fig. 1A illustrates a schematic view of a plurality of print wires 1 having solenoid anvil tips or shoulders 3 which may be impacted or driven by electromechanical devices well known in the art. The structure of the print head, the driving solenoids, etc., is not shown for clarity. The wires in Fig. 1A are aligned in a generally converging or tapered array to align along a vertical path shown in Fig. 1B as plane 2. The wires 1 may be in a circular configuration at end 3 or in some modification thereof which is well known. As will be noted in Fig. 1B, the individual wires 1 may have slightly differing lengths as a result of their manufacturing operations. When the wires 1 have been assembled together in the wire matrix print head which comprises wire guides for convergence, etc.

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Matrix Print Head Wire Length Adjustment Technique

Fig. 1A illustrates a schematic view of a plurality of print wires 1 having solenoid anvil tips or shoulders 3 which may be impacted or driven by electromechanical devices well known in the art. The structure of the print head, the driving solenoids, etc., is not shown for clarity. The wires in Fig. 1A are aligned in a generally converging or tapered array to align along a vertical path shown in Fig. 1B as plane 2. The wires 1 may be in a circular configuration at end 3 or in some modification thereof which is well known. As will be noted in Fig. 1B, the individual wires 1 may have slightly differing lengths as a result of their manufacturing operations. When the wires 1 have been assembled together in the wire matrix print head which comprises wire guides for convergence, etc., the ends will differ slightly in their placement relative to plane
2. These ends are usually required to be ground even to assure consistent printing quality and registration of the resulting printing dots. The technique of grinding the wires is somewhat cumber some and expensive and requires additional care and clean-up since the wire particles are extremely abrasive and must be removed from the print head when the operation is finished.

An alternative manufacturing technique that assures that the ends of the wires 1 will fall along an even plane 2 is shown in Fig. 2. In Fig. 2, the wires 1 converge as they are shown in Fig. 1A. The ends...