Current collector for resistive ribbon printers

Typewriting machines – Typing by other than type-face or type-die – Thermal

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101 1, 219216, 346 76PH, 427121, B41J 304

Patent

active

043290710

ABSTRACT:
For an electro-thermal printer of the kind that uses a ribbon having a central conducting layer that is covered on one surface by a resistive layer that receives electrical printing currents and on the other surface by a thermally transferrable ink layer, printing current is collected from the conducting layer by an electrically conducting contactor at the ink layer surface of the ribbon. Such contact through the ink layer occurs on the takeup side of a printhead where the integrity of the ink layer is not of concern and voids in the ink layer occur as a result of ink transfers for printing. To increase the quality of the electrical connection, projecting points or barbs may be included on said contactor to penetrate to the conducting layer through intact portions of ink layer.

REFERENCES:
patent: 2713822 (1955-07-01), Newman
patent: 3719261 (1973-03-01), Heinzer et al.
patent: 3744611 (1973-07-01), Montanari et al.
patent: 3855448 (1974-12-01), Hanagata et al.
patent: 3995729 (1976-12-01), Anton et al.
patent: 4064982 (1977-12-01), Anton et al.
patent: 4195937 (1980-04-01), Baran
"Color Thermal-Transfer Printing", Edgar et al., IBM.RTM. Technical Disclosure Bulletin, vol. 23, No. 7A, pp. 2633-2634, 12/1980.
"Thermal Biasing Technique for Electrothermic Printing", Wilbur, IBM.RTM. Technical Disclosure Bulletin, vol. 23, No. 9, p. 4302, 2/1981.

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