公开(公告)号：US3924725A

公开(公告)日：1975-12-09

申请号：US48402274

申请日：1974-06-28

Applicant: IBM

Inventor： KUHN ROBERT F ,  LYONS THEODORE F ,  RAIDER JERRY W

IPC: B41J1/30 ,  B41F1/60 ,  B41J1/24 ,  B41J7/44 ,  B41J9/04 ,  G06K15/08 ,  B41J1/32

CPC classification number: B41J1/24 ,  B41J9/04 ,  Y10S400/901

Abstract: The gap usually required in the arrangement of type characters around the periphery of the print disc in a rotating disc printer to provide time for hammer settle-out is obviated by having two separate type arrays on the disc, one of primarily lower case characters followed by one of primarily upper case characters. To minimize reach the print hammer is movably supported so as to be shifted relative to the print position from a normal lower case position to a special upper case position so as to strike the type on the disc over two different ranges of positions - one range for lower case and a different range for upper case.