(19)
(11) EP 0 028 539 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.05.1982 Bulletin 1982/21

(43) Date of publication A2:
13.05.1981 Bulletin 1981/19

(21) Application number: 80303951

(22) Date of filing: 05.11.1980
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 19.12.1979 US 91646
05.11.1979 US 91605
05.11.1979 US 91645
05.11.1979 US 91657
05.11.1979 US 91658

(71) Applicant: XEROX CORPORATION
 ()

(72) Inventors:
  • Gabor, Andrew
     ()
  • Crystal, Richard G.
     ()
  • Klein, Enrique J.
     ()
  • Frankhuizen, Michiel
     ()
  • Rempel, William D.
     ()

   


(54) Print hammer assembly


(57) A print hammer assembly is disclosed comprising a support structure (38) having a hammer element (32) supported at one location thereon and a plunger (46) supported at another location thereon, and an electromagnetic actuator (59) including a pair of magnetizable members (76, 78) displaced apart a predetermined distance to define a space (84) of sufficient dimensions to enable the movement of the plunger (46) therethrough. The actuator (59) is capable of being selectively energized to establish a magnetic field in the space (84) to control the movement of the plunger (46) through the space. The print hammer assembly also comprises a mounting assembly for movably mounting the support structure (38) adjacent the electromagnetic actuator (59) such that the plunger (46) is in a position to be forced through the space upon energization of the actuator, whereby the support structure and thus the hammer element (32) will each be moved in a predetermined direction and at a predetermined speed upon energization of the actuator. The hammer element (32) is secured to the support structure (38) by way of a leaf spring assembly (60, 62).






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