Bar code printing mechanism

Details Bar code printing mechanism Bar code printing mechanism

1979-11-05

1981-12-22

Eickholt, E. H.

Typewriting machines

Code-printing typewriter

400124, 4001545, 400167, 101 9302, 101 9304, 101 9311, 101 9344, B41J 500

Patent

active

043068170

ABSTRACT:
A mechanism using a stepping motor as the prime mover for a bar code printing head or hammer mounted on the end of a pivotal lever. Where the output code (such as the postal code used in the U.S.) requires a full bar as one binary indication and a half bar the other binary indication, two motors each with its own printing head are used. The heads are spaced apart longitudinally relative to an object to be printed. A full bar is made up of two half bars, thus, both motors must be energized at separated time intervals to cause both heads to strike in a single transverse alignment to print a full bar. The lever supporting the printing head is constructed to position its center of percussion essentially in alignment with the printing hammer to minimize wear on the motor shaft.

REFERENCES:
patent: 2554981 (1951-05-01), Goff
patent: 3386378 (1968-06-01), Bradbury et al.
patent: 3406303 (1968-10-01), Erickson
patent: 3459976 (1969-08-01), Nyman
patent: 3493091 (1970-02-01), Kapp
patent: 3586953 (1971-06-01), Markkanen
patent: 3670647 (1972-06-01), Funk et al.
patent: 3977509 (1976-08-01), Leersnijder
patent: 3992688 (1976-11-01), Keck
patent: 4084502 (1978-04-01), Heyraud
patent: 4152614 (1979-05-01), Noguchi et al.
"Print Hammer Drive", IBM Tech. Discl. Bulletin, vol. 11, No. 11, Apr. 1969, p. 1609.
"Universal Product Code Printer", IBM Tech. Discl. Bulletin, vol. 17, No. 5, Oct. 1974, pp. 1451-1452.
"Bar Code Printer", IBM Tech. Discl. Bulletin, vol. 15, No. 12, May 1973, pp. 3794-3795.

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