公开(公告)号：US2880996A

公开(公告)日：1959-04-07

申请号：US55275255

申请日：1955-12-13

Applicant: IBM

Inventor： STILES DONALD J

IPC: B65H3/24 ,  G06K13/103

CPC classification number: G06K13/103 ,  B65H3/24 ,  B65H2301/42322

公开(公告)号：US3585927A

公开(公告)日：1971-06-22

申请号：US3585927D

申请日：1969-12-22

Applicant: IBM

Inventor： BURNS ROBERT C ,  DREJZA JOHN E ,  MANNING DONALD F ,  STARK RICHARD L ,  STILES DONALD J ,  WALLACE JOSEPH E ,  WILSON JOSEPH T

IPC: B41J9/38 ,  B41J7/84 ,  H01F7/14

CPC classification number: B41J9/38

Abstract: In a high performance print magnet, magnet yokes are independently resiliently mounted on a common support, the yoke is tapered at the pole face to concentrate the flux attracting the armature, and the push rod used to actuate a pivoted print hammer is spring biased to hold the magnet armature against a back stop and prevent the push rod from following the print hammer after the magnet armature seals.