US 5,181,329 A · Drying apparatus

Abstract

Apparatus for drying a web comprises a pair of spaced parallel plates defining a channel there between of predetermined thickness and length for receiving the web. The plates are provided with juxtaposed elongated openings respectively for injecting drying air into the channel on opposite sides of the web. Air under pressure is supplied to the openings to establish a high velocity laminar flow of air from the openings in opposite directions along the surface of the web. Air is evacuated from the channel on opposite sides of the web at a predetermined distance from said openings to maintain the heat transfer rate in the air higher than the heat transfer rate in the web.

Claims7

Dependent claims

Apparatus for drying a web comprising:

a pair of spaced parallel members having flat surfaces defining a channel there between of predetermined length and thickness for transport of the web there between;
juxtaposed elongated openings in said surfaces respectively;
means for supplying air under pressure to said openings to establish cushions of air on opposite sides of the web and a high velocity laminar flow of air in opposite directions from said openings over the surface of the web, the web being supported in said channel by said cushions of air and said laminar flow of air;
and means for evacuating air from said channel on opposite sides of the web at a predetermined distance from said openings to maintain the heat transfer rate in the air in said channel higher than the heat transfer rate in the web.

1 more element

Dependencies are inferred from the claim text.

Drying apparatus

Life of this patent

Drying apparatus

Life of this patent

Abstract

Claims7