Hermann Berstorff Maschinenbau Gmbh

Bison-werke Bahre & Greten Gmbh & Co Kg

Heinz Brinkman

Berndt Greten

Rolf Gersbeck

An apparatus for plasticizing material such as rubber, synthetics plastics and like plasticizable compositions comprising feeding material between two spaced apart surfaces, preferably rollers, at least one of which is rotatingly propelled, the surfaces being so shaped and relatively disposed that the material is repeatedly subjected to varying pressure, varying down to zero at times, and thus more intensive, less intensive and virtually no shearing work. Where the surfaces are on rollers the rollers are preferably formed with helical grooves, the rollers being rotated in the same or opposite directions.

Apparatus for plasticizing material such as rubber, synthetic plastics

Apparatus for the continuous production of chipboard, fibreboard or like panels, comprising a tensioned endless steel belt guided over a plurality of rollers and partially around a heated revolvable press drum such that said rollers press the belt against said drum, sprinkler apparatus disposed over a portion of the belt which extends horizontally before said drum in the direction of movement of the belt such that material to form said panels sprinkled onto said portion of the belt is pressed between the belt and the drum to form a web of material, wherein at least one of said plurality of rollers has over its width a convexly ground surface, whereby panels produced on the apparatus can have substantially uniform thickness and weight. The apparatus may include heating and/or cooling means for regulating the temperature of longitudinally extending zones of the belt and/or peripherally extending zones of said drum and/or said rollers thereby, due to thermal expansion or contraction, to regulate the tension in said longitudinally extending zones of said belt or to change the contour of the peripheral faces of said drum and said rollers to assist production of panels of uniform density and thickness across their width.

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Bennigsen, Germany

Heinz Brinkman