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assigned to SwedSteam AB one side of each frame to form a heat transfer surface" across the:~ndow, the panels being stacked with each alternate panel turned 90 degrees to form first and second air flow paths through the spaces between the plastic films, the frame being made of corrugated cardboard or fluted plastic.
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air heat exchanger utilizing a rigid outer tube and a continuous, flexible inner tube. The corrugated, flexible inner tube is spiralled longitudinally around a center core and creates turbulence in the air which permits a rapid exchange of heat between the exhaust and fresh air streams.
## New Patents iii being sent to an expansion turbine-compressor means to recover the work energy theiefrom and to provide at least all the compressed air requirements of the first and second regeneration zones, and preferably in addition the compressed air requirements of the CO-incinerator/combu
This seal arrangement is designed for an eccentric drive shaft such as may drive a shaker
A patent for the zipper of re-closable packages that includes an impressed pattern which is impinged against by the slider is described. This creates an aesthetically pleasing appearance and sound as the closure is operated. A corresponding tactile sensation is also created. A number of variations a