公开(公告)号：US3500081A

公开(公告)日：1970-03-10

申请号：US3500081D

申请日：1968-11-26

Applicant: IBM

Inventor： DREJZA JOHN E ,  KOZOL EUGENE T ,  PELKIE ROBERT E ,  WALLACE JOSEPH E

IPC: H02K37/20 ,  H02K37/00

CPC classification number: H02K37/20

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.