Abstract: A composite low-twist towel that is formed of three parts: terry yarn, ground warp yarn and weft yarn. The ground warp yarn and the weft yarn are normal towel yarns and the terry yarn is a composite low-twist yarn. The composite low-twist yarn is composed of two yarns of different thickness, among them, the spun yarn is synthetic fiber spun yarn or filament yarn, and the thick yarn is the pure cotton yarn or the blended yarn of pure cotton and other fibers. The composite low-twist yarn is made into a warp beam through warping and sizing. Then, it interweaves with ground warp yarns and weft yarns through a towel loom or warp loom to form terry fabrics.

Abstract: In the case of an apparatus on a spinning preparation machine, e.g. a draw frame, flat card, combing machine or the like, in particular a double-head draw frame, with at least two driven drafting systems having force-transmitting means for driving drafting rollers of the drafting systems and at least one drive motor, a coupling is present between a drive motor and a drive shaft. To allow the effectiveness and efficiency to be substantially increased in a structurally simple and cost-effective manner, the respective drive chains are connected via a respective controllable coupling to the motor and the rotational speed of the motor can be reduced for the engagement and disengagement process.

Abstract: A sliver-delivering machine such as a card and a sliver coiler are each provided with an independent drive including a frequency-controlled free-phase motor. In addition, a frequency converter is connected in common to the motor of each drive for supplying power to each. The motors of the sliver-delivering machine and the coiler have a load-dependent speed characteristic, for example, each is an asynchronous motor with a maximum slip of 3% over a delivery speed range of up to 300 m/min.

Abstract: A drafting frame includes first and second drafting roll pairs being spaced from one another consecutively in the direction of sliver advance and each being formed of two cooperating drafting rolls; first and second drive motors; a first torque transmitting arrangement connected to the first drive motor and to one of the drafting rolls of the first drafting roll pair for driving the first drafting roll pair in a forward sense for feeding the sliver in the direction of advance; a second torque transmitting arrangement connected to the second drive motor and to one of the drafting rolls of the second drafting roll pair for driving the second drafting roll pair in a forward sense for feeding the sliver in the direction of advance; an electronic regulating arrangement for regulating an rpm of at least one of the two drive motors for equalizing irregularities of the sliver; a first freewheel backstop for preventing a rotation of the first drafting roll pair in a reverse sense; and a second freewheel backstop for p

Abstract: Drawing frame for drawing fiber sliver with draw frame rollers comprising a pair of pre-drawing rollers and a main drawing roller pair. Power transmission members in the form of flat belts are used for driving the draw frame rollers. A deflection pulley engages the flat belts between respective pairs of wheels deflecting the belts for increasing the angle that the flat belt extends around the respective wheels to provide a non-slip engagement between the flat belts and the respective wheels.

Abstract: In the case of a drafting unit for a spinning machine comprising several drivable bottom rollers, it is provided that the feeding bottom roller is constructed as a sleeve which can be connected with a drive shaft by coupling devices. The coupling devices comprise a swivelling lever which can be applied radially to the drive shaft and which engages in a catch of the drive shaft. The swivel shaft of the swivelling lever is arranged on the sleeve.

Abstract: In a spinning machine having a plurality of drafting units which each comprise several bottom rollers constructed as roller sections, it is provided that the sliver-carrying area of the bottom rollers is separated from the area receiving the clutch element and the driving wheels by means of a partition, the partitions of two adjacent drafting units being connected with one another.

Abstract: A draft mechanism for use on a spinning machine includes a series of roller pairs each including a bottom roller and a top roller. The roller pairs are connected to output shafts of motors through the use of timing belts. The motors are electrically controlled according to the draft ratios. Roller gauge adjusting shafts are meshed with bearing portions of the top and bottom rollers.

Abstract: A drafting unit for a spinning machine has several stub shaft supported bottom rollers which are each assigned to a spinning point and which are in driving connection with drive shafts extending through in longitudinal direction of the machine. To facilitate servicing operations, the bottom rollers are held by means of support components which are detachably mounted at a machine frame which accommodates the drive shafts.

Abstract: A spinning machine having several spinning points is disclosed having at least one drafting unit assigned to each spinning point. Each drafting unit has several top rollers and several drivable bottom rollers. At least the bottom rollers which are assigned to the feeding side for the fiber material are driven by a common drive shaft extending in longitudinal direction of the machine by means of transmission devices which contain a coupling. It is provided that at least the bottom rollers assigned to the feeding side are arranged adjustably for the adjusting of the distance with respect to the respective rollers which follow while maintaining a driving connection between the common drive shaft and the respective ones of said bottom rollers.

Abstract: In the case of a spinning machine having a plurality of drafting units, which each contain several top rollers and bottom rollers, and in which the bottom rollers are each constructed as roller sections which can be individually separated form a central drive, it is provided that the bottom rollers are constructed as hollow cylinders which are disposed on stationary shafts.

Abstract: A spinner is disclosed having at least one drawing roller arrangement, the bottom rollers of which are driven by at least one electric motor. For the purpose of identifying specific malfunctions and setting errors, a monitor is allocated to the electric motor, or to at least one of the electric motors, which monitors its power input and/or torque.

Abstract: The present invention provides a draft roll arrangement in a spinning frame in which the apron bottom roll is longitudinally divided into two sections at a location along its length selected to be within a range for which torsion of the apron bottom roll does not pose a problem in spinning, and in which the respective bottom rolls are operatively connected to one another in such a manner that one of the ends of the back and front bottom rolls and one apron bottom roll section are connected to a driving source and the drive for the other apron bottom roll section is derived through the back and front bottom rolls. In a preferred embodiment, the respective apron bottom roll sections are associated with rotational angle sensors whose output rotational angle signals are supplied to a control unit. When the difference in the rotational angle has exceeded a preset value, an output signal indicating such state is issued from the control unit.

Abstract: A filament drawing apparatus has a support, at least two pairs of rollers spaced apart on the support in a travel direction so that a filament to be drawn passes in the direction between the rollers of both pairs, and a drive having at least two output shafts and including a transmission for rotating the shafts at different speeds. One of the shafts is connected to one of the roller pairs and the other roller pair is displaceable on the support in the travel direction relative to the one roller pair. An input gear is mounted on the other output shaft and an output gear is mounted on one of the rollers of the other roller pair and is displaceable therewith in the direction. An input link has one end pivoted at the other output shaft and an opposite end and an output link has one end pivoted at the one roller of the other roller pair and has an opposite end pivoted on the opposite end of the input link. An intermediate gear pivoted on the opposite ends meshes with and interconnects the input and output gears.

Abstract: A draw frame of a sliver-drafting apparatus has three cascaded roller pairs whose lower rollers are driven by respective motors at speeds determined by associated frequency dividers and/or multipliers in the output of a common oscillator of adjustable operating frequency. The slivers drafted by the roller pairs form, after doubling or plying, a fiber bundle traversing a thickness sensor whose output, integrated over predetermined time periods, is used by a microcomputer to ascertain optimum nip-line spacings and contact pressures reducing the thickness variations to a minimum.

Abstract: A textile fiber drafting apparatus is disclosed, according to which the drafting bottom rollers in each line along the spinning units of a spinning frame are arranged in such a way that each two adjacently juxtaposed bottom rollers make a single block for each two spinning units, so that each bottom roller has an open, free end through which an apron may be replaced with a new one or fibers entangled on the roller may be removed with extreme ease. Between each such two spinning units is provided an arrangement for driving the bottom rollers thus disposed, including driving and driven mechanisms.

Abstract: A drawing frame has an electric driving motor (M) and a main shaft (H), which is drivingly connected to several driven rollers (W1-W4, W1'-W4') in the two draw heads (11) of the drawing frame. Between the motor (M) and the main shaft (H) are arranged a belt adjusting gear mechanism (V and HO) and a clutch (K). The transmission ratio of the adjusting gear (V and HO) is automatically gradually reduced from a maximum value to the operating value, so that the main shaft (H) is smoothly accelerated.Cut-off devices are provided for automatically stopping the frame when a disturbance of any kind occurs. The cut-off devices switch off the electric motor (M), release the clutch (K) and actuate a brake (B) which acts upon the main shaft (H), and also an adjusting member of an adjustable disc (V) of the belt-adjusting gear (V and HO). The brake (B) can be relatively small, as it does not have to decelerate the uncoupled motor (M).

Abstract: A draw frame of a sliver-drafting apparatus has three cascaded roller pairs whose lower rollers are driven by respective motors at speeds determined by associated frequency dividers and/or multipliers in the output of a common oscillator of adjustable operating frequency. The slivers drafted by the roller pairs form, after doubling or plying, a fiber bundle traversing a thickness sensor whose output, integrated over predetermined time periods, is used by a microcomputer to ascertain optimum nip-line spacings and contact pressures reducing the thickness variations to a minimum.

Abstract: A method and apparatus for transmitting a driving power in a drafting device of a spinning frame. In the drafting device comprising a pair of back rollers, middle rollers and front rollers arranged in order, the driving power for the middle rollers is transmitted through a transmission passage different from a transmission passage for transmitting the driving power for the back rollers and front rollers.

Abstract: A drive system for a drawframe for a rove drawing process in which the drawframe includes at least one pair of feed rollers, at least one pair of sleeves, at least one pair of drawing rollers, and at least one swinging arm on which one feed roller, one sleeve and one drawing roller of each pair is supported, the swinging arm being displaceable between an inoperative position and an operative position where the pair of feed rollers, pair of sleeves and pair of drawing rollers are engaged under pressure for rove drawing. The drive system includes a drive shaft and at least one displaceable friction clutch roller which is displaceable between an operative position to engage both the drive shaft and one of the feed rollers for transmitting drive from the drive shaft to the feed roller, and an inoperative position where it is disengaged from the feed roller, the friction clutch roller being displaceable into its operative position to allow progressive engagement of the drawframe at start up.

Abstract: A drive for the rolls defining a main drafting zone of drafting arrangements of long spinning machines, wherein in order to prevent drafting defects caused by distortion movement of the rolls, the latter are driven from one end by a first gear arrangement and from the other end are interconnected rigidly drivewise or slippage-free, respectively, during the standstill of the spinning machine via a second gear arrangement and via a freewheel clutch.

Abstract: An assembly of fiber-drawing rollers, used for stretching rovings or fiber bundles in a spinning machine, is divided into a plurality of stages each including an elongate driven roller and a set of coacting counterrollers, the driven rollers being rotated at predetermined relative speeds with the aid of several motors including at least one pair of synchronous motors positively coupled with a drawing roller at opposite ends thereof. These synchronous motors are energized with three-phase current of a frequency determined by the setting of a digitally adjustable frequency selector controlling a solid-state frequency inverter. The selector comprises a frequency divider in the output of a preferably also adjustable source of timing signals which may be a pulse generator driven by a motor coupled with another drawing roller.

Abstract: An assembly of filament-drawing rollers, used for stretching rovings or fiber bundles in a spinning machine, is divided into a plurality of stages each including an elongate driven roller and a set of coacting counterrollers, the driven rollers being interconnected at both ends by respective gear trains for rotation at predetermined relative speeds by a motor driving one of these gear trains. In order to prevent any overstressing of the mechanism if nonmatching gears are inadvertently inserted into the two gear trains, a torque limiter in the form of a shearing bolt or a friction clutch is interposed between at least one driven roller and an associated driving gear. Advantageously, the torque limiter is provided with a device generating an alarm signal upon relative rotation, due to overload, of its input and output shafts respectively joined to the driving gear and the driven roller.

Abstract: A long spinning machine, preferably a ring spinning machine, with a plurality of drawing means, which serve to draw the fiber strands with the drawing means being arranged adjacent to each other and extending lengthwise of the machine the drawing lower rollers of the drawing means formed by a plurality of long roller lines positively connected together at one point by drive gear transmissions which provide predetermined rpm ratios between the roller lines with some of the roller lines connected together by additional drive gear transmission at least at one additional point spaced from the one point to eliminate or substantially reduce torsion in the roller lines.

Abstract: A textile drawing machine has interchangeable drawing heads mounted between the feed rollers and the drawing rollers, to enable it to treat different types of textile fibres. The heads are readily replaceable in a frame of the machine and have support and drive members engaging support and drive members on the frame.

Abstract: A rotary drafting apparatus for use in a spinning machine, which apparatus comprises a pair of back rollers coactively rotatable for guiding therethrough sliver to be drafted, and a pair of front rollers coactively rotatable for drafting the guided sliver. A sliver control mechanism is interposed between the back rollers and the front rollers and includes plural pairs of control rollers, which are rotatably supported through their respective support shafts and which are formed with numerous needles, so that the guided sliver may be combed when it is passed therethrough. A rotation regulating mechanism is also incorporated in the drafting apparatus so as to regulate rotation of that pair of the control rollers, which is positioned closer to the front rollers, substantially at a predetermined constant angular velocity in a manner to be free from being affected by any possible variation in the drafting force of the front rollers, thereby minimizing unevenness in thickness of the sliver obtainable.