SINGLE ENDLESS STRAND MOUNTED IN A SERIES OF PARALLEL CONVOLUTIONS AS A FIBROUS WEB SUPPORTING SURFACE IN A PAPERMAKING MACHINE

摘要

A porous supporting structure for a fluid impregnated web or sheet in a papermaking machine is composed of a a single endless strand mounted to travel in an endless path over a roll assembly with adjacent, machine direction convolutions of strand being in parallel relation to form a moving supporting surface for the web. Multiple single strand systems located in the longitudinal direction of the paper-making system can be employed, the individual endless strand systems constituting web support for the forming, pressing, and drying sections. Adjacent strand systems have a common support roll and convolutions of the strands associated with adjacent roll assemblies pass over the common roll to integrate the strands and provide a continuous supporting surface for the paper web. Each web supporting surface can be provided with areas of different physical characteristics, such as porosity, by adding or removing convolutions from certain areas of the web supporting surface or by substituting strands of different physical characteristics.