Process and apparatus for drying a liquid film applied to a movi

Details Process and apparatus for drying a liquid film applied to a movi Process and apparatus for drying a liquid film applied to a movi

1990-08-22

1992-09-15

Bennet, Henry A.

Coating processes

With post-treatment of coating or coating material

Heating or drying

34156, 118 58, 118 63, B05D 302, F26B 1300

Patent

active

051476908

ABSTRACT:
An apparatus for drying a liquid film on a substrate web which includes a lower gas or air supply system and an upper gas or air supply system. The substrate strip is subjected to a flow of hot supply air (or gas) without mechanical support of guide elements, which air (or gas) forms a carrying cushion and at the same time supplies drying energy to the liquid layer applied to the substrate. The exhaust air (or exhaust air) is carried away through return channels. Slots for the gas or air supply and the return channels for the gas or air removal are arranged alternately in the lower gas or air supply system. The upper gas or air supply system has a greater width than the lower gas or air supply system. In the upper gas or air supply systen, the supply air or the gas is diverted by baffles onto the substrate and returned over the substrate web as return air or gas. The upper gas or air supply system is subdivided into sections for the supply air and exhaust air or the inflowing gas and outflowing gas, each section including two filter plates of porous material.

REFERENCES:
patent: 3012335 (1961-12-01), Allander et al.
patent: 3060594 (1962-10-01), Meier-Windhorst
patent: 3559301 (1971-02-01), Fraser
patent: 3577653 (1971-05-01), McClenathan et al.
patent: 3979038 (1976-09-01), Karlsson
patent: 4905381 (1990-03-01), Poterala
Martin et al., "Ursachen der Randubertrocknung in Schlitzdusentrocknern," Chemie Ingenieur Technik, 42, issue 14, 1970, pp. 927-929.
Martin, "Berechnung der Schlitzweite eines Schlitzdusenfeldes under der Bedingung konstanten Warme- und Stoffuberganges in Abstromrichtung," Chemie Ingenieur Technik, 43, issue 8, 1971, pp. 516-519.
Martin et al., "Optimierung von Schlitzdusentrocknern auf Grund neuer Versuchsergebnisse uber den Warme- und Stoffubergang in solchen Apparaten," Chemie Ingenieur Technik, 45, issue 5, 1973, pp. 290-294.
Kramer et al., "Schwebetrockner fur beschichtete Blechbander," Journal gas warme international, vol. 24, 1975, No. 12, pp. 527-531.

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