Coating processes – Transfer or copy sheet making – Coating opposite sides or forming plural or nonuniform coats
Patent
1989-07-14
1990-09-18
Schwartz, Pamela R.
Coating processes
Transfer or copy sheet making
Coating opposite sides or forming plural or nonuniform coats
427150, 503200, 503226, B41M 516
Patent
active
049577786
ABSTRACT:
A chemically self-copying paper intended for use in the combinations of a top sheet (CB), bottom sheet (CF) and one or more interleaving sheets (CFB) or a chemically copying, self-containing paper. The paper is formed of two fiber layers manufactured in separate wire sections and couched together while wet. The wire side of the upper fiber layer and the top surface of the lower fiber layer are couched together. The components inducing the color reaction are contained in the upper fiber layer which has been in contact with a smooth-surfaced press roll during the production of the paper.
REFERENCES:
patent: 3565753 (1971-02-01), Yurkowitz
patent: 4496961 (1985-07-01), Devrient
patent: 4629630 (1986-04-01), Devrient
A. Ahlstrom Corporation
Schwartz Pamela R.
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