Importance

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Abstract

A compact web dryer oven (A) is disclosed which is heat efficient, may be open for convenient cleaning, and raises automatically under the effects of an explosion to relieve pressure and reduce damage to the oven interior. The oven includes a lower housing (B) and an upper housing (C) which are essentially identical. Each housing includes an air distribution system having a short path and recycle time which includes a hot air discharge blower (H), an air reducing plenum (I), and a redirecting chamber (J) which directs the air in a vertical direction. An elongated air diffuser manifold (K) extends the length of the housing and includes a radial arrangement of pipes (71) and radial air openings (72) which distribute the air (45) in equal parts across the width of web (W). Lower and upper hot air registers (E,F) receive the proportioned air flow. The air registers include spaced tubular members (22) transverse to the air diffuser manifold having an air divider nozzle (G) positioned between each member. A first nozzle (32), second nozzle (34), and third nozzle (42) are defined relative to tubular members (22) and nozzle bodies (G) which accelerate the flow of air in a manner to balance the air currents at the web. Equal but opposite air flows (26,28) are produced by the nozzle body. A spring assembly (96) and pivot (94) provide for release of upper housing (C) upon exertion of an initial lifting force either manually or by explosion.

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First Claim