Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1981-03-27
1982-12-28
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 34, 34155, 34231, 34233, 118 58, 4273722, F26B 304, F26B 1302
Patent
active
043654231
ABSTRACT:
In the drying of sheet materials which have been coated with a layer, or with two or more superposed layers, of liquid coating composition, improved drying conditions which result in less formation of mottle are provided by the use of a foraminous shield, such as a screen or perforated plate, located in close proximity to the coated surface. The sheet material, for example a web of paper or polymeric film or a succession of discrete sheets of paper or polymeric film is conveyed through a drying zone, along a predetermined path, while a gaseous drying medium, such as air maintained at an elevated temperature, which serves to promote evaporation of the liquid medium in the coating composition, is directed through the foraminous shield onto the coated surface. The foraminous shield functions to promote uniform heat transfer conditions and restricts the extent to which spent gaseous drying medium, which is discharged from the drying zone, comes into contact with the surface of the coating, thereby minimizing mottle formation. While the foraminous shield is useful in any drying operation in which mottle formation is a problem, it is especially advantageous in the drying of photographic materials, particularly those comprising one or more layers formed from coating compositions that contain volatile organic solvents.
REFERENCES:
patent: 1144896 (1915-02-01), Fosbraey
patent: 2320702 (1943-06-01), Marchese et al.
patent: 3012335 (1961-12-01), Allander et al.
patent: 3287815 (1966-11-01), Yunghahn
patent: 3374106 (1968-03-01), Thygeson
patent: 3404025 (1968-10-01), Wootten
patent: 3500741 (1970-03-01), Bok
patent: 3508947 (1970-04-01), Hughes
patent: 3525164 (1970-08-01), Brown
patent: 3599341 (1971-08-01), Darcy et al.
patent: 3632374 (1972-01-01), Greiller
patent: 3710758 (1973-01-01), Hoff
patent: 4023472 (1977-05-01), Grunder et al.
patent: 4051278 (1977-09-01), Democh
patent: 4061082 (1977-12-01), Shuler
patent: 4064832 (1977-12-01), Chujo et al.
patent: 4075976 (1978-02-01), Clayton
patent: 4113903 (1978-09-01), Choinski
patent: 4170930 (1979-10-01), Lind
patent: 4245397 (1981-01-01), Larr et al.
patent: 4287240 (1981-09-01), O'Connor
Pp. 250-255 from textbook, "Electrostatic Precipitation," by Sabert Oglesby, Jr. et al, published by Marcel Dekker Inc., New York, N. Y. 1978.
H. L Dryden and G. B. Schubauer, Journal of the Aeronautical Sciences, vol. 14, No. 4, pp. 221-228, Apr. 1947.
Research Disclosure, Item 18916, Jan. 1980, published by Industrial Opportunities, Ltd., Homewell, Havant Hampshire, PO9 1EF United Kingdom.
Pp. 262-272 from textbook, "Industrial Electrostatic Precipitation," by H. J. White, published by Addison-Wesley Publishing Co., Inc., 1963.
Pp. 45.8, 45.9, 46.0, 46.1, 46.2 and 46.3 from "The Electrostatic Precipitator Manual," Chapter II, Section 8, copyright 1977, by The McIlvaine Company.
Arter Thomas C.
Barbee Eugene H.
Eastman Kodak Company
Lorenzo Alfred P.
Schwartz Larry I.
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