Stilt capsules for pressure-sensitive record material

Details Stilt capsules for pressure-sensitive record material Stilt capsules for pressure-sensitive record material

B - Operations, Transporting

41

M

42/15, 117/15

B41M 5/124 (2006.01)

Patent

CA 1129261

ABSTRACT OF THE DISCLOSURE 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 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.

325607

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