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Zero-Wear Backstop for Print Hammer Actuators

IP.com Disclosure Number: IPCOM000059733D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Bohg, A: AUTHOR

Abstract

Rest position I of a print hammer armature 3, pivotable about axis 4, is defined by, say, a spring-tensioned holding band 2 fastened to armature 3 and a fixed point 1. When armature 3 is pivoted in the direction P to position II during operation, band 2 becomes untensioned and buckles. Upon returning to its rest position, band 2 is instantly tensioned, acting as a hard, wear-resistant stop. Band 2 is preferably flat or takes the form of a (say, carbon) fiber rope. By being suitably pre-deformed, band 2 may be made to buckle in a predetermined direction and for damping vibrations, may be perforated and/or coated and be provided with a variable cross-section or be designed as a restoring spring for armature 3.

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Zero-Wear Backstop for Print Hammer Actuators

Rest position I of a print hammer armature 3, pivotable about axis 4, is defined by, say, a spring-tensioned holding band 2 fastened to armature 3 and a fixed point 1. When armature 3 is pivoted in the direction P to position II during operation, band 2 becomes untensioned and buckles. Upon returning to its rest position, band 2 is instantly tensioned, acting as a hard, wear-resistant stop. Band 2 is preferably flat or takes the form of a (say, carbon) fiber rope. By being suitably pre-deformed, band 2 may be made to buckle in a predetermined direction and for damping vibrations, may be perforated and/or coated and be provided with a variable cross-section or be designed as a restoring spring for armature 3.

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