Textiles: manufacturing
Patent
1978-04-25
1980-07-08
Hess, Bruce H.
Textiles: manufacturing
252316, 427150, 427151, 428216, 428307, 428308, 428327, 428331, 428402, 428403, 428404, 428407, 428537, 428914, B41M 516, B41M 522
Patent
active
042114373
ABSTRACT:
This invention relates to paper, or like sheet material, having a coating comprising minute, liquid-containing, pressure-rupturable capsules, and also larger, non-rupturable kaolin-containing stilt capsules arranged in interspersion and in close juxtaposition. In the preferred embodiment the smaller capsules contain a liquid marking agent. The capsules, large and small, are interspersed as to size, and are closely spaced on the sheet, so that an intentional impact directed on a small area of the coating will crush substantially all of the small capsules in the area and result in the release of liquid marking agent, whereas a casually applied pressure will rupture relatively few of the small capsules in the area. The marking liquid may be a colorless chromogenic color reactant. The small capsules on a sheet containing said marking liquid may be associated with other color forming materials on said sheet, or alternatively said color forming materials may be contained on another contacting sheet.
REFERENCES:
patent: 3179600 (1965-04-01), Brockett
patent: 3617334 (1971-11-01), Brockett et al.
patent: 3697323 (1972-10-01), Brown et al.
patent: 3996405 (1976-12-01), Porter
patent: 4038445 (1977-07-01), Robertson
Hayford Donald E.
Myers Hugh K
Appleton Papers Inc.
Hess Bruce H.
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