Dot-matrix printer with dot counter and temperature sensor for e

Details Dot-matrix printer with dot counter and temperature sensor for e Dot-matrix printer with dot counter and temperature sensor for e

1991-01-24

1992-10-06

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400 54, B41J 230

Patent

active

051526190

ABSTRACT:
A dot-matrix printer with a print head having plural print elements which are disposed in a row and selectively activated to form a dot or dots in a vertical row of a dot matrix pattern representing a character, having a device for adding to a content of a memory the numbers of dots which are formed by the elements; a device for measuring a time lapse; a temperature sensor for sensing a temperature of the print head; a device for substracting a predetermined value based upon the temperature sensed by the temperature sensor at predetermined time intervals; a device for checking whether the content of the memory has exceeded a reference value; and a control device for controlling the print head so as to cool the print head if the content of the memory has exceeded the predetermined value.

REFERENCES:
patent: 3577137 (1971-05-01), Brennan, Jr.
patent: 4473311 (1984-09-01), Sakaida
patent: 4637742 (1987-01-01), Sakai
patent: 4653940 (1987-03-01), Katsukawa
patent: 4978239 (1990-12-01), Alexander
patent: 5059044 (1991-10-01), Takaishi

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