High speed printer hammer assembly

Details High speed printer hammer assembly High speed printer hammer assembly

B - Operations, Transporting

41

J

101/98

B41J 9/30 (2006.01)

Patent

CA 1126087

HIGH SPEED PRINTER HAMMER ASSEMBLY Abstract of the Disclosure A high speed printer is provided having a plurality of aligned hammer assemblies for directing hammers at a moving charac- ter band for printing characters responsive to the hammers driving against the character band. The hammer assembly has a striker arm pivotedly mounted to a striker assembly frame and which acts as an armature when driven by a pair of magnets. The magnets are at- tached to the striker assembly frame on opposite sides of the striker arm and on opposite sides of the pivot point for the striker arm so that simultaneously actuating both magnets pulls the striker arm for actuating the hammer. Each magnet has a single coil, with one of the magnets having a reverse polarity from each adjacent magnet on an adjacent assembly, while the other magnet has the same polarity to avoid cross-talk and to increase the speed of the printer. A pressure-sensitive tape is bonded to the striker armature to provide a residual air gap between the arma- ture and magnet poles and improvements are made in the hammer guide combs, return plunger, and the platen.

312942

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