Dot matrix printing device

Details Dot matrix printing device Dot matrix printing device

1979-04-10

1980-12-09

Miller, Jr., George H.

Recorders

Thermal recording

400120, G01D 1510, B41J 300

Patent

active

042388066

ABSTRACT:
A dot matrix printing device for electronic calculator comprising a plurality of electrically heatable dots of an insulating plate aligned therebetween and spaced according to a constant pitch to print the digits of the calculator amounts. A symbol dot is located adjacently to the terminal digit dot which prints the least significant digit of the amount, aligned with the other dots of the plurality. The symbol dot is spaced from the terminal digit dot by a distance greater than the constant pitch of the other dots and prints the explanatory symbols of the amounts leaving a blank between the digits and the symbols of the amounts.

REFERENCES:
patent: 4070680 (1978-01-01), Shelley
patent: 4077505 (1978-03-01), Giolitti et al.
patent: 4138605 (1979-02-01), Stapleton et al.

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