Semi-automatic centering control

Details Semi-automatic centering control Semi-automatic centering control

1975-12-24

1977-05-10

Burr, Edgar S.

Textiles: fiber preparation

197 91, B41J 2320, B41J 1962

Patent

active

040223124

ABSTRACT:
Disclosed is a control mechanism and device for conditioning a typewriter to backspace on every other depression of a keylever and at the same time to prevent printing on all depressions of keylevers. Additionally, the typewriter is conditioned to not print on those cycles in which a backspace movement is not included.
This control mechanism and system allows the typist to key headings and other materials which would normally be centered in a no print mode and upon the completion of keying the entry once and switching into a normal typing mode, the typewriter is properly positioned with respect to the page for immediate rekeying of the heading or entry to provide centered copy.

REFERENCES:
patent: 1455079 (1923-05-01), Cook
patent: 2606739 (1952-08-01), Gardner
patent: 3382963 (1968-05-01), Cralle
patent: 3618736 (1971-11-01), Abell et al.
patent: 3625335 (1971-12-01), Ricciardi et al.
patent: 3892304 (1975-07-01), Shakib
patent: 3924723 (1975-12-01), Cooper et al.
IBM Technical Disclosure Bulletin, W. H. Castle et al., vol. 15, No. 3, Aug. 1972, pp. 978-979.

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