公开(公告)号：US2858002A

公开(公告)日：1958-10-28

申请号：US43710454

申请日：1954-06-16

Applicant: IBM

Inventor： HEIDT WILLIAM A ,  MULLER CHARLES A

IPC: B41J5/26

CPC classification number: B41J5/26

公开(公告)号：US3578131A

公开(公告)日：1971-05-11

申请号：US3578131D

申请日：1968-11-08

Applicant: IBM

Inventor： HEIDT WILLIAM A ,  PALMER LEON E ,  SCHAEFER JOHN O

IPC: B41J21/08 ,  B41J1/60 ,  B41J19/20 ,  B41J19/00

CPC classification number: B41J1/60 ,  B41J19/20

Abstract: The writing line of a typewriter is extended by combining movements of the paper and of a type element carrier. Incremental letter feed is accomplished by movement of the type element carrier along a writing line past the paper which is normally stationary. Upon reaching an advanced position, the type element carrier is restored in the reverse direction and the paper is advanced to present the next letter space to the type element in its restored position. Continued typing advances the type element carrier incrementally to the end of the writing line. Operation of a line-return key restores the carrier directly to a new line left-hand margin position, indexes the paper to a new line and restores the paper to its original beginning-of-line position.

公开(公告)号：US3259223A

公开(公告)日：1966-07-05

申请号：US39770164

申请日：1964-09-21

Applicant: IBM

Inventor： HEIDT WILLIAM A ,  WALTON NEIL D

IPC: B41J7/94 ,  B41J23/12

CPC classification number: B41J7/94 ,  B41J23/12

公开(公告)号：US3022879A

公开(公告)日：1962-02-27

申请号：US79581059

申请日：1959-02-26

Applicant: IBM

Inventor： HEIDT WILLIAM A ,  ROLLER DONALD C

IPC: B41J31/10

CPC classification number: B41J31/10