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    Typewriter with extended writing line
    5.
    发明授权
    Typewriter with extended writing line 失效
    TYPEWRITER与扩展书写行

    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.

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