公开(公告)号：US3618736A

公开(公告)日：1971-11-09

申请号：US3618736D

申请日：1969-12-22

Applicant: IBM

Inventor： ABELL WILLIAM A JR ,  ISAACS CHARLES M ,  O'DANIEL JEROME B

IPC: B41J29/70 ,  B41J7/94 ,  B41J19/62 ,  B41J29/64 ,  B41J23/08

CPC classification number: B41J19/62 ,  B41J7/94 ,  B41J29/64

Abstract: A single-elment printer having a complex drive cam for control of print impact velocity, employs power taken from the print shaft within the type element carrier to perform backspace operations as selected by the velocity control mechanism.