Digital printer

Printing – Selective or progressive – Bed and platen machines

Patent

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Details

346101, B41J 2500

Patent

active

039481689

ABSTRACT:
A printer for printing in alpha-numeric character form information from a digital source available in the form of a video-type signal representative of alpha-numeric characters corresponding to the digital information. The printer utilizes a high speed rotating spindle having at least one spiral electrical conductor on its periphery and means for forming a mark on a continuous sheet of paper in response to an electrical signal applied to the spiral conductor. The paper is moved past the spindle at a velocity proportional to, but substantially less than the tangential velocity of the spiral conductor. The video-signal is received into a double buffer memory and unloaded to the spiral conductors in phase sequence with the rotation of the spindle whereby a matrix of dots is formed on the paper in designated locations so as to produce alpha-numeric characters corresponding to the digital information.

REFERENCES:
patent: 2202855 (1940-06-01), Hogan et al.
patent: 3286625 (1966-11-01), Petit
patent: 3678847 (1972-07-01), Pear, Jr. et al.
Alden "Flying Spot" Helix Recorder As Show in Alden Catalog 3/1971 pp. cover-15.

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