Flat belt apparatuses and methods are provided where one or more cords in the flat belt are tensioned or pre-tensioned to extend the service life of the flat belt.

A rubber V-belt yarn blank coating and cutting device is described herein. The rubber V-belt yarn blank coating and cutting device is numerically controlled and includes a frame and a base compound rubber leading-out device, a base compound rubber conveying device, and a base compound rubber coating and cutting mechanism sequentially disposed on the frame. The base compound rubber coating and cutting mechanism includes a driving roller and a driven tensioning roller disposed on the frame and further includes grouped round cutting knives and a squeezing roller. The squeezing roller is positioned between the driving roller and the driven tensioning roller, and the grouped round cutting knives with a sliding mechanism are disposed above the squeezing roller. The coating and cutting device in the present invention is simple in structure, high in cutting precision, labor efficiency and operational safety, and convenient to mount.

The invention relates to elastomer sandwich systems containing at least two components, wherein one component is (i) a thermoplastic polyurethane functioning as a cover layer and, adhering thereto over its area, the second component is (ii) a noncellular cast polyurethane having a density of from 800 to 1800 kg/m.sup.3 functioning as a carrier layer, wherein at least one component of the elastomer sandwich system has a tear propagation resistance in accordance with ISO 34-1 of from 30 kN/m to 85 kN/m and an abrasion loss in accordance with ISO 4649 of from 50 mm.sup.3 to 5 mm.sup.3 and in addition at least the two components have a rebound resilience in accordance with DIN 53512 of 35%-70%, and a process for the production thereof. The invention further relates to metal composite elements containing elastomer sandwich systems, a process for the production thereof and the use thereof as lining elements in the transport sector and mining and mine sector, in particular in hoppers and conveyor belts. Elastomer sandwich systems can also be used as protection for loading floors of trucks.

A tube material is formed by continuously extruding a thermoplastic resin material in the shape of a cylinder that has a thickness of 100 m and a circumferential length of 800 mm. After that, in a polishing process, the tube material is rubbed with a lapping tape of #2000 while being rotated in one direction at a fixed speed, so that circumferential stripes are formed on the outer circumferential surface of the tube material. Then, the circumferential stripes are thermally transferred by pressing the outer circumferential surface of the heated tube material against a mold surface that is finished in the shape of circumferential stripes by a thermal transfer process.

A tube material is formed by continuously extruding a thermoplastic resin material in the shape of a cylinder that has a thickness of 100 m and a circumferential length of 800 mm. After that, in a polishing process, the tube material is rubbed with a lapping tape of #2000 while being rotated in one direction at a fixed speed, so that circumferential stripes are formed on the outer circumferential surface of the tube material. Then, the circumferential stripes are thermally transferred by pressing the outer circumferential surface of the heated tube material against a mold surface that is finished in the shape of circumferential stripes by a thermal transfer process.

A belt for an elevator system includes a plurality of tension members arranged along a belt width and extending longitudinally along a length of the belt and a jacket at least partially enclosing the plurality of tension members. The jacket defining a traction side of the belt configured to interface with a traction sheave of an elevator system. The jacket includes a base material layer, and a coating layer positioned over the base material layer formed from a self-extinguishing fluoroelastomer material. A method of forming a belt for an elevator system includes forming a plurality of tension members and encapsulating the plurality of tension members in a jacket. The jacket includes a base material layer and a coating layer formed from the self-extinguishing fluoroelastomer material.

A belt for an elevator system includes a plurality of tension members arranged along a belt width and extending longitudinally along a length of the belt and a jacket at least partially enclosing the plurality of tension members. The jacket defining a traction side of the belt configured to interface with a traction sheave of an elevator system. The jacket includes a base material layer, and a coating layer positioned over the base material layer formed from a self-extinguishing fluoroelastomer material. A method of forming a belt for an elevator system includes forming a plurality of tension members and encapsulating the plurality of tension members in a jacket. The jacket includes a base material layer and a coating layer formed from the self-extinguishing fluoroelastomer material.

A foam twin-sheet formed air filled gasket is provided. The foam sheets need not be covered with one or more layers of air impermeable materials before, during or after the twin-sheet forming process. Methods for manufacturing the air filled gaskets are also disclosed.

An endless belt includes a base layer and a resin layer. The base layer includes a metal film. The resin layer is laminated on an outer side of the base layer. The resin layer includes edge portions in an axial direction with at least one edge portion of the edge portions made narrower than the base layer in the axial direction such that the outer side of the base layer is exposed.

An endless belt includes a base layer and a resin layer. The base layer includes a metal film. The resin layer is laminated on an outer side of the base layer. The resin layer includes edge portions in an axial direction with at least one edge portion of the edge portions made narrower than the base layer in the axial direction such that the outer side of the base layer is exposed.