Abstract: A fluoropolymer suitable for the preparation of a fluoroelastomer. The fluoropolymer generally includes repeating units derived from the monomers tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, chlorotrifluoroethylene and optionally one or more repeating units from fluorinated monomers other than tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride and chlorotrifluoroethylene.

Abstract: A yarn tightening element for a weaving machine, comprising a passage (16) for a yarn (15) and a contact means (2) to transmit a tightening force to a yarn (15) moving along through this passage, the passage (16) being not bordered on at least one side of the plane of movement of the yarn (15) or comprises a boundary (14) that is interrupted across its width, so that a part of the yarn (15) running through from that side of the plane of movement, via the interruption (17), can be made to co-operate with the contact means (2). Said boundary is, for instance, formed by one or more fingers (14) directed downwards, while said interruption (17) of this boundary (14) is formed between the extremities of each finger (14) and a part (8) of the yarn tightening element. Such a yarn tightening element can be placed on a yarn very easily and quickly by means of a hooking on movement and be removed again by means of an equally simple hooking off movement.

Abstract: A yarn tightening element for a weaving machine, comprising a passage (16) for a yarn (15) and a contact means (2) to transmit a tightening force to a yarn (15) moving along through this passage, the passage (16) being not bordered on at least one side of the plane of movement of the yarn (15) or comprises a boundary (14) that is interrupted across its width, so that a part of the yarn (15) running through from that side of the plane of movement, via the interruption (17), can be made to co-operate with the contact means (2).

Abstract: A device for tensioning and drawing back warp yarns brought from a creel to a weaving machine. The tensioning and drawing back device keeps tension and if necessary draws back warp yarns (2) led from a bobbin (1) to a weaving machine. A supporting body (6) has a curved friction surface to support the warp yarn (2) between the bobbin (1) and the weaving machine. A first (7) and a second tensioning element (8) exert a tensile force on the warp yarn (2), respectively, in front of and behind the curved friction surface (6). The tensioning elements (7), (8) can be suspended from the warp yarn (2) and for example only through their own weight may exert this tensile force. This device easily draws back the warp yarn (2) out of the weaving area. The replacement of a bobbin (1) occurs without interruption or disturbance of the weaving process.

Abstract: A weaving frame or module for supporting warp thread bobbins for a weaving device and for changing bobbins with the weaving modules and bobbin pallets, has bobbins that can, at least partly, be changed without causing any interruption or any disturbance to the warp thread tension in the weaving zone of the weaving device. The frame or module is subdivided into a number of fixed cells for taking individual bobbin pallets each of which has supports for holding a bobbin and for guiding and breaking a thread.

Abstract: A thread-tensioning and pull-back device for use with a weaving machine for controlling the tension of a series of warp threads pulled off from removable and replaceable bobbins arranged in rows in a weaving rack of a weaving machine is adapted to be located in front of the weaving rack of the weaving machine. The device includes a series of thread guide plates each having a feed-through eye whereby each guide plate tensions the thread through each guide plates own weight. The guide plates could also be leaf springs which tension the threads by bending stress.