Woven fabric belt for a machine for the production of web material, especially paper or cardboard

Abstract

A woven fabric belt for a machine for the production of web material, especially paper or cardboard, includes a web material side first fabric layer and a machine side second fabric layer, with threads extending in machine direction and respectively with threads extending in cross machine direction, whereby the first woven fabric layer and the second woven fabric layer are connected with each other by paired binder threads, whereby the binder thread pairs tie off with threads of the second fabric layer extending in one direction of machine direction and cross machine direction in such a way that in the second fabric layer—in the other direction of longitudinal direction of the belt and cross direction of the belt—consecutive groups of threads which are gathered by the binder threads and extend in the one direction are formed and/or whereby inside one field of repeat extending in the second fabric layer in machine direction and cross machine direction the threads of the second fabric layer which extend in the other direction of machine direction and cross machine direction tie off at the threads of the second fabric layer extending in the one direction in order to form respective tie-off points on a side facing away from the machine contact side in such a way that at least one group of tie-off points is formed within the field of repeat which press the threads of one group of threads of the second fabric layer extending in the one direction against each other in the other direction.

1 . A woven fabric belt for a machine for producing a web of fibrous material which is one of paper and cardboard, said woven fabric belt comprising:
 a first fabric layer which is woven and forms a web material side of the woven fabric belt;   a second fabric layer which is woven and forms a machine side of the woven fabric belt, said first and second fabric layers including a first plurality of threads extending in a first direction, a second plurality of threads extending in a second direction, and a plurality of binder threads which are paired with one another to form a plurality of binder thread pairs, said first direction being one of a machine direction and a cross machine direction, said second direction being a remaining one of said machine direction and said cross machine direction relative to said first direction, said first plurality of threads extending in said first direction including a third plurality of threads of said second fabric layer extending in said first direction, said second plurality of threads extending in said second direction including a fourth plurality of threads of said second fabric layer extending in said second direction, said first fabric layer and said second fabric layer being connected with each other by said plurality of binder thread pairs, at least one of:   (1) said plurality of binder thread pairs tying off with said third plurality of threads of said second fabric layer extending in said first direction in such a way that in said second fabric layer, in said second direction, consecutive first groups of said third plurality of threads which are gathered by said plurality of binder threads and extend in said first direction are formed, and   (2) inside one field of repeat extending in said second fabric layer in said first direction and said second direction said fourth plurality of threads of said second fabric layer which extend in said second direction tying off at said third plurality of threads of said second fabric layer extending in said first direction in order to form respective tie-off points on a side facing away from a machine contact side of the woven fabric belt in such a way that at least one second group of said tie-off points is formed within said field of repeat which at least one of (a) presses respective ones of said third plurality of threads forming one said first group of said third plurality of threads of said second fabric layer extending in said first direction against each other in said second direction, and (b) presses respective ones of said fourth plurality of threads forming a group of said fourth plurality of threads of said second fabric layer which extend in said second direction against each other in said first direction.   
     
     
         2 . The woven fabric belt according to  claim 1 , wherein said first groups of said third plurality of threads of said second fabric layer extending in said first direction which are arranged adjacent to each other in said second direction include a same number of threads of said third plurality of threads. 
     
     
         3 . The woven fabric belt according to  claim 2 , wherein each of said first groups of said third plurality of threads of said second fabric layer extending in said first direction includes two said threads of said third plurality of threads. 
     
     
         4 . The woven fabric belt according to  claim 1 , wherein, in a respective one of said plurality of binder thread pairs, one said binder thread progresses alternately on said machine contact side of a respective first said first group of said third plurality of threads extending in said first direction, and another said binder thread of said respective one of said plurality of binder thread pairs progresses on said machine contact side of a respective second said first group of said third plurality of threads of said second fabric layer which follows said respective first said first group. 
     
     
         5 . The woven fabric belt according to  claim 4 , wherein, with said plurality of binder thread pairs which are located immediately after each other in said first direction, one said binder thread of one respective said binder thread pair progresses on said machine contact side of a respective said first group of said third plurality of threads of said second fabric layer which extend in said first direction, and one said binder thread of a following respective said binder thread pair progresses on said machine contact side of another respective said first group of said third plurality of threads of said second fabric layer immediately following in said second direction and extending in said first direction. 
     
     
         6 . The woven fabric belt according to  claim 1 , wherein said second plurality of threads extending in said second direction includes a fifth plurality of threads of said first fabric layer extending in said second direction, two threads of said fifth plurality of threads of said first fabric layer which extend in said second direction and two threads of said fourth plurality of threads of said second fabric layer which extend in said second direction are provided between two of said plurality of binder thread pairs which are located following each other in said first direction. 
     
     
         7 . The woven fabric belt according to  claim 1 , wherein each said second group of tie-off points includes a first tie-off point and a second tie-off point, wherein, in each said second group of tie-off points, said first tie-off point and said second tie-off point are formed in said second direction on both sides of said respective ones of said third plurality of threads forming one said first group of said third plurality of threads of said second fabric layer which extend in said first direction and which are pressed against each other by each respective said second group of tie-off points. 
     
     
         8 . The woven fabric belt according to  claim 7 , wherein said first tie-off point and said second tie-off point are formed by immediately adjacent ones of said fourth plurality of threads in said second fabric layer which extend in said second direction. 
     
     
         9 . The woven fabric belt according to  claim 8 , wherein each said second group of tie-off points includes a third tie-off point and a fourth tie-off point, wherein, in each said second group of tie-off points, said third tie-off point and said fourth tie-off point are formed in said first direction on both sides of said first tie-off point and said second tie-off point and in said second direction between said first tie-off point and said second tie-off point. 
     
     
         10 . The woven fabric belt according to  claim 9 , wherein said third tie-off point and said fourth tie-off point are formed at immediately adjacent ones of said third plurality of threads extending in said first direction of a respective said first group of said third plurality of threads of said second fabric layer which extend in said first direction. 
     
     
         11 . The woven fabric belt according to  claim 9 , wherein a respective one of said plurality of binder thread pairs is located between said immediately adjacent ones of said fourth plurality of threads of said second fabric layer which extend in said second direction and which form said first tie-off point and said second tie-off point. 
     
     
         12 . The woven fabric belt according to  claim 7 , wherein within one said field of repeat each of said fourth plurality of threads of said second fabric layer extending in said second direction is tied off at respectively only one of said third plurality of threads of said second fabric layer extending in said first direction, thereby forming a respective one of said tie-off points. 
     
     
         13 . The woven fabric belt according to  claim 7 , wherein within one said field of repeat respectively only one of said fourth plurality of threads of said second fabric layer extending in said second direction ties off at each of said third plurality of threads of said second fabric layer extending in said first direction. 
     
     
         14 . The woven fabric belt according to  claim 7 , wherein between two successive said tie-off points in said second direction of each one of said fourth plurality of threads of said second fabric layer extending in said second direction each one of said fourth plurality of threads progresses on said machine contact side of said third plurality of threads of said second fabric layer extending in said first direction. 
     
     
         15 . The woven fabric belt according to  claim 1 , wherein said respective ones of said third plurality of threads forming one said first group of said third plurality of threads of said second fabric layer extending in said first direction which are pressed against each other by said second group of tie-off points in said second direction are gathered into one said first group by respective ones of said plurality of binder threads extending in said second direction. 
     
     
         16 . The woven fabric belt according to  claim 1 , wherein said first direction is said machine direction which is consistent with a longitudinal direction of the woven fabric belt, said second direction being said cross machine direction which is consistent with a cross direction of the woven fabric belt. 
     
     
         17 . The woven fabric belt according to  claim 16 , wherein said first direction is consistent with a warp direction and said second direction is consistent with a weft direction.