LAMINAR CUSHION

A cushion consisting of three layers of foam plastic or foam rubber separated by double layers of polyolefin foil. The layers of foam material are each formed with a multiplicity of passages extending in the direction of layer thickness, and the passages in each layer are aligned with respective pas...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	SCHUSTER W,DT
Format:	Patent
Sprache:	eng
Schlagworte:	BEDS CHAIRS COFFEE MILLS DOMESTIC ARTICLES OR APPLIANCES FURNITURE HUMAN NECESSITIES METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING PERFORMING OPERATIONS SADDLERY SOFAS SPICE MILLS SUCTION CLEANERS IN GENERAL TRANSPORTING UPHOLSTERY UPHOLSTERY NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	A cushion consisting of three layers of foam plastic or foam rubber separated by double layers of polyolefin foil. The layers of foam material are each formed with a multiplicity of passages extending in the direction of layer thickness, and the passages in each layer are aligned with respective passages in the other two layers. The polyolefin layers provide two integral, pressure-responsive valves in each passage, each valve being formed by a flap bounded in one foil layer by a crescent-shaped cut and normally superimposed on a portion of the other foil layer formed with an opening therein. The cushion breathes when subjected to varying compressive stresses.