32results about How to "Inhibition of tension changes" patented technology

An overend unwind system for unwinding tacky elastomeric fiber threads such as uncoated spandex thread, capturing the ballooning affect of the thread as the thread leaves the spool, applying a first-stage tension control on the thread adjacent where the thread leaves the spool, feeding the unwound thread to a nip in a downstream process, and applying a final tension increment to the thread adjacent where the thread enters the downstream process. All thread guide surfaces encountered by the thread after leaving the spool, and while the thread is under designed operating tension, are moving surfaces, such that the tensioned thread thereby experiences a reduced level of drag as the thread traverses its path of travel from the spool to the downstream process.

The invention provides a winding device, a tension device and a winding method. A winding device 100 which winds a wire 3 around a core 11 includes the core 11, which rotates axially and around which the wire 3 is wound; a roller 21 which rotates axially and feeds the wire 3, which is wound around the roller 21, to the core 11; and a tension device 15 which adjusts a tension of the wire 3 that is supplied to the core 11 from the roller 21. A winding shape and a winding diameter of the wire 3 wound around the roller 21 are substantially identical to a winding shape and a winding diameter of the wire 3 wound around the core 11.

The invention provides an intermittent coating apparatus, wherein a substrate (1) to be conveyed in a conveying path is intermittently contacts coating rollers (11, 12). The intermittent coating apparatus comprises guide rollers (6, 7) arranged close to a plurality of coating rollers (11, 12) along the conveying path of the substrate (1) for limiting the movement direction of the substrate (1); a driving mechanism (18) for individually driving each of the guide rollers (6, 7). Therefore, the substrate (1) contacts or gets away from the coating rollers (11, 12), so that the coating agent is uniformly and respectively coated onto different regions of the substrate (1).

The invention provides an end yarn insertion device which clamps the end yarn to insert into the internal of knitted fabrics. End yarn insertion device (1) is set on a flat knitting machine for glove (2), with a guide track (23) and a base (31) sliding transitionally along the guide track (23). The base (31) is equipped with a movable object (32) shifting relatively relative to the base (31). The movable object (32) is equipped with an end yarn hook (33) and an end yarn pressing foot (34). The end yarn hook (33) shifts between the capture position of capture yarn and the hook backoff position of knitting needle backoff. The end yarn pressing foot (34) acts continuously with the end yarn hook (33), shifting on the clip position where it coordinates with the end yarn hook on the capture position to span support position supporting yarn captured by the end yarn hook and on the pressing foot backoff position where it yields with the knitting needle and the end yarn hook (33). A second driving mechanism (26) drives the end yarn hook (33) to shift between the capture position and the hook backoff position. The base (31) is equipped with a stopper (48). The stopper (48) jams and fixes the end yarn pressing foot(34) shifting from the pressing foot backoff position to the support position to prevent shifting, ensure that the end yarn pressing foot stands by on the stand-by position where the yarn of yarn feeding yields. And the end yarn pressing foot (34) is detached from the stopper (48) by shifting the movable object (32) relatively relative to the base(31).

Provided is a polarizing film free of the unevenness in hue. The polarizing film is obtained by treating a polyvinyl alcohol film in order of swelling, dyeing, boric acid treatment and rinse treatment, subjecting the film to uniaxial stretching in a boric acid treatment step and/or a step before the same and further maintaining the tension acting on the film respectively substantially constant in the respective steps after the stretching treatment, wherein the polyvinyl alcohol film is successively treated in order of the swelling treatment, the dyeing treatment, the boric acid treatment and the rinse treatment, the film is subjected to the uniaxial stretching in the boric acid treatment step and/or the step before the same and further tension control of the film is performed in the respective steps after the stretching treatment, so that the travel of the film is stabilized and the unevenness of the hue can be reduced.

A conveyance apparatus includes a conveyance roller, a conveyance motor, a back tension roller, a conveyance speed detector, a brake, and a controller. The controller is configured to: based on a conveyance speed of a web detected by the conveyance speed detector, control a value of a drive control parameter of the conveyance motor such that the conveyance speed of the web is equal to a target speed; and, based on an output torque of the conveyance motor corresponding to the value of the drive control parameter, adjust a braking force of the brake applied to the back tension roller which applies a tension to the web such that the tension of the web is equal to a target tension.

A wire-cut electric discharge machine comprises a wire running system, in which a wire is run through a wire bobbin, brake rollers, a wire guide, and a wire take-up device in the order named. As a device for reducing the variation in wire tension is arranged between the wire bobbin and the brake rollers in the wire running system, variation of the wire tension that is caused on the wire supply side of the brake rollers can be restrained effectively.

Provided is a fiber machine capable of eliminating the problems in the conventional technique wherein it requires a yarn threading device to be particularly devoted to thread a thread guide to a hidden position behind each takeup device, the easiness to conduct the maintenance work of its traversing device remains poor, yarn severance weights are difficult to find, and the yarn type to admit processing is restricted owing to the refraction angle of the thread guide. The fiber machine includes a provisionally twining machine 1 arranged so that taking-out of a yarn package 12 from each takeup device 15 and supplying an empty bobbin 21 to the takeup device 15 are conducted from the side with the working passage R, wherein the takeup devices 15 are arranged zigzag along the in-line laid direction of the weights 10 in such a fashion that the takeup devices 15 of adjoining weights 10 are positioned different in the up-and-down positioning, and a guide for yarn running is installed so that each yarn Y led into the takeup device 15 runs outside the space in which taking-out of the produced package 12 out of an other takeup device 15 and supplying a bobbin 21 to other takeup device 15 take place.

The invention provides a blanked refuse winding apparatus for continuous label paper. The apparatus has a releasing roller that is configured to carry continuous label paper subjected to a half-blanking process and separate into blanked products and blanked refuse that adhere to backing paper, and the blanked refuse winding apparatus for continuous label paper includes: a refuse winding shaft; a moving mechanism; a first detector; a second detector; a calculator; a refuse pressing roller; and a guide belt.

The coating film transfer tool includes: a feeding core around which transfer tape is wound and that feeds a piece of transfer tape, the piece of transfer tape including a piece of base tape and a coating film that is provided on one surface of the piece of base tape; a transfer head that presses the coating film against a transfer target and transfers the coating film thereonto; a winding core that winds up the piece of base tape from which the coating film has been transferred; and an intermediate roller that rotates as the piece of transfer tape travels, in contact with a first surface of the piece of transfer tape fed from the feeding core, the first surface being a surface on which the coating film is not provided. A second surface of the intermediate roller is adhesive with respect to the first surface.

The purpose of the present invention is to provide a horizontal looper wherein changes in tension for a metal strip are suppressed. A horizontal looper 6 for a continuous processing line for a metal strip 2 is provided with: a loop car 17 that has a fixed roller 7 and a winding roller 8 on which the metal strip is wound along with the fixed roller, and that moves so as to change the gap between the fixed roller and the winding roller in the direction in which the metal strip is conveyed, thereby changing the amount of the metal strip accumulated in the horizontal looper; and a main support roller car 26 that has a support roller 9 for supporting the metal strip crossing between the fixed roller and the winding roller, and that moves in the same direction as the loop car. The loop car and the main support roller car have a loop car winch 20, an output side winch 27, and an introduction side winch 28 that are independent from each other, and can move independently.