Calculator having thermal printing head

Details Calculator having thermal printing head Calculator having thermal printing head

1974-07-19

1976-08-03

Morrison, Malcolm A.

Registers

Transfer mechanism

Traveling pawl

219201, 219216, H05B 100, G06F 312

Patent

active

039731111

ABSTRACT:
Disclosed is an electronic calculator which has a thermal printing head or active printing area exposed to the ambient environment to enable printing in a stamp-like fashion. In the preferred form, the thermal printing head comprises a predetermined number of thermal printing units each unit having a plurality of segment-shaped resistors. More particularly, a metal layer of platinum, nickel-chrome alloy, etc., is deposited in accordance with a segment configuration on a glass-glazed substrate of beryllium oxide. A current flow through the metal segments will cause the generation of heat therein which makes a clearly distinct record on a heat-sensitive paper.

REFERENCES:
patent: 3405392 (1968-10-01), Milne et al.
patent: 3501615 (1970-03-01), Merryman et al.
patent: 3819921 (1974-06-01), Kilby et al.
patent: 3870856 (1975-03-01), Taniguchi

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