CONVEYOR BELT

Abstract: A known conveyor belt, which is endless and runs over support rolls and turning rolls for the transportation of relatively light objects, consists of a woven fabric made of longitudinal filaments (1, 2) and cross-wise monofilaments. Such a conveyor belt is improved and offers a better runability and wear resistance by that at least the cross-wise filaments consists of flat or oval yarns (3) or yarns formed in a different way, where the ratio between width and height of the cross-section is at least 1.5.

Description: Conveyor belt A This invention relates to a conveyor belt, which is endles and runs over support rolls and turning rolls for the tran portation of relatively light objects and which consists o a woven fabric made of lingitudinal filaments and cross-wi monofilaments . Conveyor belts of this kind are used in the food industry and in the wood working industry and are intended for light transportation of objects and is made of material, which consists of thin, woven fabrics having longitudinal fila¬ ments and crosswise monofilaments having circular cross- section. The material of the yarns is often polyester but may be of other fiber forming polymers. According to the invention the conveyor belt of now describ kind can be improved and offer better runnability and wear resistance by that at least the cross-wise filaments consist of flat oi" oval varns or varns formed in a different way, where ratio between width and height of the cross-section is at least 1.5. The space between crossing yarns is filled up effectively and the stiffening crosswise yarns can be given a larger cross-section without that the dimensions of the belt otherwise are changed. The larger cross-section area and volume of the crosswise filaments will increase the shear¬ ing resistance of the belt, which means that the belt will be easier to run and stear. A further advantage is that the crosswise yarns will offer a larger contact surface against the support, i.e. against rolls, sliding planes, etc., whic will reduce the wear. Two embodiments of the invention will be described in the following with reference to the enclosed drawings. Fig. 1 discloses a part of a longitudinal section through a conveyor belt of a known type. Fig. 2 discloses rt similar longitudinal section of a con¬ veyor belt according to the invention. Fig. 3 discloses a schematic perspective view of a second embodiment of the conveyor belt according to the invention. The fabric of which the conveyor belt is made of, consists of longitudinal filaments 1 and 2 and the known conveyor belts have crosswise yarns of circular cross-section accord¬ ing to what is shown in Fig. 1. Multifilament yarns are usually used for the longitudinal yarns. According to the fabric shown in Fig.. 2 2 the crossvrise yarns of the conveyor belt according to the invention consist of flat oval yarns 5 where the ratio between the width and height of the cross-section is at least 1:5. Fig. 3 shows a cross- section form for the crosswise yarns 4, which are almost of rectangular form. The longest side of the cross-section is placed in the running direction of the conveyor belt. It may desirable to increase the lengthwise stiffness of certain conveyor belts and also increase the bearing re¬ sistance of the belt against the supporting wheels. It is therefore preferable to use monofilaments also for the longitudinal yarns and a further advantage may be if also these yarns are flatened or have an oval cross-section. The fabric is preferably impregnated or coated e.g. with polyacrylic, polyuretane or silicon resins. The coating pro¬ cedure will be performed easier when exchanging the circular crosswise filaments with flatened monofilaments by that the space between crossing yarns w r ill be smaller, i.e. the con¬ tinuously open pores will decrease in size. In practice the fabric is manufactured endless by endless weaving or by splicing the ends together. An endless fabric can also be made by mechanical joints of different kinds.

Claims: CLAIMS:- v 1. Conveyor belt, which is endless and runs over suppor rolls and turning rolls for the transportation of relative light objects and which consists of a woven fabric having longitudinal filament yarns (1, 2) and crosswise onfila- mejit yarns , c h a r a c t e r i z e d in that at least the crosswise monofilaments (3, 4) consist of flat, oval o in a different way formed yarns, where the ratio between width and height of the cross-section of the yarns are at least 1.5. 2. Conveyor belt according to claim 1, c h a r a c ¬ t e r i z e d in that the longitudinal yarns (1 , 2) con¬ sist of flatened monofilaments. 3. Conveyor belt according to claims 1 and 2, c h a ¬ r a c t e r i z e d in that the fabric is impregnated and/or coated by any polymers as polyacrylic, polvetene or silocon resins. 4. Conveyor belt according to any of the preceding claims, c h a r a c t e r i z e d in that the fabric is manufactured endless by weaving, splicing, gluing or by mechanical joints.

Inventors: ALMHEM ROLF, ALMHEM, ROLF
Applicants: SCANDIAFELT AB
Application year: 1988
Main classification: B65G15
IPC codes: B65G15