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.

公开(公告)号：US3576164A

公开(公告)日：1971-04-27

申请号：US3576164D

申请日：1969-06-25

Applicant: IBM

Inventor： DREJZA JOHN E ,  MANNING DONALD F ,  PELKIE ROBERT E

IPC: B41J11/20 ,  G06K15/16 ,  B41J

CPC classification number: G06K15/16

Abstract: In a printer, character-bearing type elements moving along a print line selectively impact a ribbon against a document backed by a platen to print on the document. The platen is automatically retracted at the end of each print cycle to provide adequate clearance for advancing the document for the next line of printing, whereupon it is advanced so as to provide an optimum space relation with the type elements for printing the next line.