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Impact Printer Hammer Damping System

IP.com Disclosure Number: IPCOM000053326D
Original Publication Date: 1980-Jan-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Hall, DA Halter, EA [+details]

Abstract

In a hammer apparatus to be used in an impact printer, as shown in the figure, the missile 10 is actuated through solenoid coil 11 to be driven towards the print element in the direction shown by the arrow. Upon completion of the print cycle, the hammer rebounds in the opposite direction. The succeeding print cycle can only be initiated When the hammer is completely settled in its rest position; therefore, bounce should be minimized. In the present expedient, in addition to damper pad 12 positioned on the face of bracket 13 to absorb the bounce of the rear of the hammer 14, the hammer assembly is further mounted within brackets 13 through shoulder screws 15 which are supported within resilient damping shoulder mounts 16, serving to further damp or decrease the undesirable bounce within the hammer assembly.