Abstract:
Yarn package cross-winding appts. has motor for driving winding spindle, the motor being controlled to keep yarn take-up speed constant throughout winding, and second motor for rotating drive shaft of yarn traverse mechanism. The speeds of the shafts are detected for generating respective electrical signals, according to which the second motor is controlled to keep the wind ratio at one or more selected constant values through winding of package. Specifically the wind ratio value is changed stepwise as package build progresses, i.e., as dia. increases, by changing speed of second motor by control signal corresp. to difference between shaft speeds signals and produced by comparator. Pref. speed changes of second motor are effected by an inverter. Pref. winding spindle motor is controlled in accordance with yarn tension detected by sensor. Packages are ribbon-free for use with fast jet looms.
Abstract:
A web smoothing roller comprising a rotary roller main body, a fiber structure with stretchability, covering the outer peripheral surface of the rotary roller main body, and an expansion/contraction means for expanding/contracting the fiber structure in the direction of the rotation center axis of the rotary roller main body.
Abstract:
PROBLEM TO BE SOLVED: To improve productivity by attaining high speed without causing creases, flaws and the like. SOLUTION: In a method for unwinding a sheet F of a master roll 1 and slitting the sheet F into a plurality of narrow sheets (f) while conveying the sheet F through carrier rollers 2 to wind the narrow sheets (f) into sheet roll bodies 4, one of unwinding the sheet of the master roll 1 and winding the sheets into the sheet roll bodies 4 is controlled in speed, while the other is controlled in tension, and the peripheral speed of the carrier rollers 2 is controlled to be synchronous with the travel speed of the sheet.
Abstract:
PROBLEM TO BE SOLVED: To stabilize the cutting performance, and to set a desirable cutting position by providing a moving means for moving a sheet material guide means, a tightly fitting means and a sheet material cutting means to a desirable position in the cross direction of a sheet material. SOLUTION: A tightly fitting means 20 pushes a presser roll from a top surface side of a sheet material to a sheet material guide means 15 for tight fitting of the sheet material 12. The sheet guide means 15 is formed of plural rotatable guide rolls and rotatable blade rest rolls. A cutting means 19 is formed of a circular blade supported freely to be rotated, and inserted into a clearance between the blade rest rolls. The circular blade is arranged on a different core from the blade rest rolls, which are concentrically arranged. Cutter units 10a, 10b can be moved in the cross direction of the sheet material crossing the carrying direction of the sheet material 12. Adjustment of the cross directional position of each cutter unit 10a, 10b is performed by moving the cutter units 10a, 10b in the cross direction of the sheet material 12 with a moving means 27 through a support block 30 and sliding shafts 31a, 31b.
Abstract:
PROBLEM TO BE SOLVED: To narrow the diameter of a shaft by forming a roller shell and the shaft of the carbon fiber reinforced resin and/or the carbon fiber reinforced metal. SOLUTION: When a load is applied to both ends of a shaft 2 of a pressure- contact roller 1 by a presser means, the load presses a cylindrical rotor of the roller shell 3 through spherical bearings 4a, 4b. At this stage, a winding roller 7, which contacts with the cylindrical rotor through a sheet layer, is bent in the pressing direction, but the spherical bearings 4a, 4b are rotated within the longitudinal cross section of the shaft 2 so as to allow the bending of the cylindrical rotor. With the bending of the winding roller 7, the cylindrical rotor is evenly curved, and both the rollers are evenly nipped over the whole area in the axial direction through the sheet layer. The shaft 2 and the roller shell 3 are made of the carbon fiber reinforced resin or the carbon fiber reinforced metal. In this pressure-contact roller 1, rigidity of the shaft 2 is improved so that the diameter thereof can be narrowed by using the carbon fiber reinforced material for the shaft 2 and the roller shell 3.
Abstract:
PURPOSE: To unwrinkle a sheet material efficiently not only near a center part of the roll but also in an end of the roll and also correspond to a thin material such as a very thin film by forming a new spiral groove gradually adding as it approaches both ends from its center. CONSTITUTION: A spiral groove 15 for sending wrinkle to both end direction in which lead angle θ slants to a direction opposite toward the both ends 12a, 12b from a roll center 11 is mounted on a surface of an unwrinkling roll. New spiral grooves 15b, 15c are gradually added and the number of the grooves are increased at it approaches the both ends 12a, 12b from the roll center 11 to improve supplementary action of a sheet material to the roll end where the wrinkle is apt to accumulate. A groove is formed such that the lead angle θbecomes larger as it approaches the both ends 12a, 12b from the roll center 12. Thereby, sending amount of the wrinkle becomes larger as the end where the wrinkle is apt to accumulate, so that enlargement action can be obtained.
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing device for a web capable of surely smoothing wrinkles without damaging the surface of the web. SOLUTION: Annular bodies 4 formed by endlessly winding a strip 7 between a pair of front and rear disks 5, 6 are arranged at both ends of a carrying passage carrying the web 1, the strip 7 on an approach route side of the annular body 4 is brought into contact with the surface of the web 1, and the moving direction of the strip 7 is set so as to slantingly cross toward the width direction end part side to the carrying direction of the web 1.
Abstract:
PROBLEM TO BE SOLVED: To provide a sheet tension detector which can reduce sheet tension detecting errors. SOLUTION: A sheet tension detector is constituted in such a way that a detection roller 21 is freely rotatably supported by a bearing 23 and, at the same time, the bearing 23 is supported by a flexure measuring instrument 24 and the detector converts the amount of flexure detected by means of the flexure measuring instrument 24, when the detection roller 21 is press-contacted with a sheet (s) to be measured into the tension of the sheet (s). The coefficient of friction μs of the outer peripheral surface of the roller 21 which comes into contact with the sheet (s) is adjusted to >0.8.