Ink ribbon which makes illegible the contents of information as

Details Ink ribbon which makes illegible the contents of information as Ink ribbon which makes illegible the contents of information as

1982-07-19

1984-07-10

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Ribbon, per se

400120, 4002411, 428913, 428914, B41J 3102

Patent

active

044590555

ABSTRACT:
An ink ribbon for a printing device comprises a substrate of a long thin web of a synthetic resin film having a solid ink coated on one surface thereof, the color of the substrate being the same as that of the solid ink. After the ink ribbon is used, the negative impressions left from the transfer of information to a printing sheet will be illegible.

REFERENCES:
patent: Re27180 (1971-09-01), Spreter et al.
patent: 1305296 (1919-06-01), Mackay
patent: 2508725 (1950-05-01), Newman
patent: 2810661 (1957-10-01), Newman et al.
patent: 3625334 (1971-12-01), Ahn
patent: 4051303 (1977-09-01), Hayashi et al.
patent: 4303307 (1981-12-01), Tureck et al.
patent: 4321309 (1982-03-01), Mino et al.
IBM Technical Disclosure Bulletin, "Thermal Display Printer", Kitamura, vol. 16, No. 7, Dec. 1973, p. 2189.
IBM Technical Disclosure Bulletin, "Document Security", Munzel, p. 20.

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