Matrix print head with improved armature retainer

Details Matrix print head with improved armature retainer Matrix print head with improved armature retainer

B - Operations, Transporting

41

J

101/96

B41J 3/50 (2006.01) B41J 2/265 (2006.01) B41J 2/275 (2006.01)

Patent

CA 1081536

MATRIX PRINT HEAD WITH IMPROVED ARMATURE RETAINER ABSTRACT OF THE DISCLOSURE A matrix print head comprises stylus guide means; a plurality of electromagnetic structures coupled to the guide means, each of the electromagnetic structures including a pole piece; a plurality of armatures disposed radially about the guide means, each of the armatures being associated with one of the electromagnetic structures to form an electro- magnetic actuator for transferring electromechanical energy to a stylus, and each of the armatures having an inner end and an outer end projecting outwardly of the associated pole piece; a plurality of styli respectively associated with the plurality of armatures, each stylus being carried by the guide means and having an armature engaging end for engaging the inner end of the associated armature and a printing end for impacting a record medium when the stylus is propelled through the guide means by energization of the associated electromagnetic actuator; and an improved armature retainer coupled to the guide means for maintaining each armature in engagement with its associated pole piece. The armature retainer comprises a relatively rigid base member having a central portion connected to the guide means and a peripheral portion including means for receiving each armature at a predetermined location between its inner and outer ends; and a relatively resilient biasing member mounted to the peripheral portion of the base member for engaging the outer end of each armature in order to bias each armature into engagement with its associated pole piece.

281416

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