Method for making paper support

Details Method for making paper support Method for making paper support

1990-03-19

1992-04-28

Simmons, David A.

Paper making and fiber liberation

Processes and products

With coating after drying

1621643, 162179, 162203, 162355, 427209, 427391, D21H 134

Patent

active

051085453

ABSTRACT:
Disclosed is a method for making a paper support for photographic paper by a Fourdrinier paper machine of the twin-wire type provided with a lower wire on which a wet web is formed and an endless upper wire facing said lower wire with the wet web between them wherein the upper wire comes in contact with the wet web after the latter has travelled a distance of 5 to 12 m from the point where the paper stock had been fed to the lower wire which is preferably shaked in a horizontal direction and the rate of drainage through the upper wire to the sum of drainages through the lower wire and the upper wire is adjusted to 15 to 50% to give a smooth surface on which a photographic emulsion layer is to be formed.

REFERENCES:
patent: 4420370 (1983-12-01), Saad
patent: 4648943 (1987-03-01), Malashenko et al.
patent: 4659430 (1987-04-01), Tamagawa et al.

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