Abstract: Apparatus and method for forming nanofibers and nonwoven webs formed of such nanofibers. The nanofibers are formed by changing the rheology in at least first and second flows of a liquid material such that the changed rheology of the first and second flows differs by an amount sufficient to produce a phase separation when the first and second flows are combined to define meltblown fibers. Each meltblown fiber has lengthwise first and second cross-sectional regions formed of the liquid material from the first and second flows, respectively. These regions are separated along a length of at least a majority of the meltblown fibers to form a plurality of nanofibers, which are collected together with any unsplit meltblown fibers to form the nonwoven web. The difference in the changed rheology of the flows may be produced by using two extruders with different barrel diameters to create differ shear histories for the two flows.

Abstract: Methods for making a nonwoven web on a collector traveling in a machine direction parallel to a length of the nonwoven web. The methods generally include forming a curtain of polymer filaments, mixing the curtain of polymer filaments with a flow of process air, depositing the curtain of polymer filaments on the collector to form the nonwoven web, and exhausting the process air through an air intake opening positioned below the collector. The method further comprises providing a substantially uniform air flow velocity across the air intake opening in a cross-machine direction perpendicular to the machine direction and adjusting an air flow velocity across the air intake opening in the machine direction to thereby define a ratio of the air flow velocity in the machine direction to the air flow velocity in the cross-machine direction.

Abstract: A stabilized filament drawing device for a meltspinning apparatus. The stabilized filament drawing device applies a high-velocity flow of air to attenuate the filaments, which are discharged from a device outlet in a discharge direction. The filament drawing device includes multiple inclined guides adjacent to the outlet that cause the high-velocity flow of air to deviate from the discharge direction by the Coanda effect. The filaments, which are entrained in the high-velocity process air, likewise deviate from the discharge direction. The guides are arranged such that spaces are absent between adjacent guides.

Abstract: A linear flow equalizer for distributing thermoplastic material to a spin pack of a meltspinning apparatus that provides for uniform apportionment of a flow of a flowable thermoplastic material at least vertically and in a cross-machine direction of the spin pack. The linear flow equalizer includes an inlet plate with multiple liquid passageways equidistantly spaced in the cross-machine direction that each provide flowable thermoplastic material to a set of equalizer plates. Elongated slots extending through alternating equalizer plates are registered with throughholes extending through adjacent plates in the equalizer plate set. Each throughhole in an upstream equalizer plate is registered with the center of a corresponding slot and each throughole in a downstream equalizer plate is registered with one of opposed closed ends of a corresponding slot.

Abstract: A stabilized filament drawing device for a meltspinning apparatus and a meltspinning apparatus including the stabilized filament drawing device. The stabilized filament drawing device applies a high-velocity flow of air to attenuate the filaments, which are discharged from a device outlet in a discharge direction. The filament drawing device includes multiple inclined guides adjacent to the outlet that cause the filaments and high-velocity flow of air to deviate from the discharge direction. Each of the guides has a major surface that is angled relative to a common plane containing the discharge direction and a cross-machine direction of the device outlet of the filament drawing device. The guides are oriented such that the major surface is also inclined relative to the discharge direction.

Abstract: In a quilting machine for quilting or stitching textile formations of cover-material webs and filler-material webs, the material webs to be stitched together are loosely withdrawn from stock rollers and sewn together along lengthwise edges or marginal portions of the material webs prior to entering a tenter device. Sewing the lengthwise edges or marginal portions includes simultaneously sewing on respective bands or ribbons which laterally extend beyond a workpiece to be quilted and serve for holding or accommodating the latter in the tenter device. It is thus possible to substantially provide the entire width of the cover-material webs and filler-material webs with a quilt pattern. In this manner, the length of waste cuttings of expensive cover material is substantially reduced.

Abstract: In a back rest arrangement on a weaving machine the back rest is preferably carried at each of its ends by one arm of a two-armed support frame or yoke which is pivotable about a stationary pivot axis on a machine frame. At least one of the arms of the support frame or yoke possesses a resilient portion or shank. A free end of the resilient shank is supported in a manner which is relatively rigid in relation to a pivoting motion of the support frame or yoke caused by the varying warp force acting on the back rest. The resilient shank is in operative association with a sensing probe for generating an electrical signal which is proportional to the deflection of the resilient shank. These measures render the arrangement suitable both for a so-called rigid or fixed back rest support as well as for a back rest support utilizing a rocking lever or rocker beam.

Abstract: A shuttleless weaving machine employs filling-yarn transfer at the center of a shed from a first gripper system advanced from one side to a second gripper system approaching from the other side. The yarn transfer is implemented by opening and subsequently closing the clamping means of the gripper systems by means of control levers which are made to enter from the outside through the warp threads into the shed. The control levers are mounted at fixed locations and are so shaped and can be so pivoted from an operational position within the shed into a rest position below the shed that, when the reed beats up, the reed stay can pass unhindered over the control levers.

Abstract: A cloth draw-off roll is operatively connected via a regulation circuit with a main shaft of the weaving machine. The regulation circuit contains a controllable motor which is drivingly connected with the cloth draw-off roll. A regulation circuit arrangement connected forwardly of the controllable motor controls the weft thread density in the drawn-off cloth as a function of at least the rotational angular position of the main shaft of the weaving machine and contains a modulator operatively connected with the controllable motor. The modulator transforms control commands of a programming stage pre-programmable via an input device, into control signals for the controllable motor. A pulse transmitter at the main shaft transmits pulses indicative of the rotational angular position of the main shaft to the programming stage. A control circuit arrangement of the weaving machine transmits information signals or data indicative of the momentary functional state of the weaving machine to the programming stage.

Abstract: For the individual, group and/or repeat change of schiffli-shuttles in embroidering machines, the schiffli-shuttle embroidering stations are shifted from centralized to decentralized shuttle stroke and vice-versa. Rotating motion of the driving shafts is converted into reciprocating motion immediately before each individual shuttle. The reciprocating motion is transmitted to entrainment rods and drive rods. The entrainment rods are rotated according to the repeat configuration so that such drive and entrainment rods are disengaged. By actuating the drive and entrainment rods, the individual schiffli-shuttles each are engaged with and disengaged from the centralized shuttle stroke. The schiffli-thread is cut, the schiffli-shuttle is arrested and the upper slider is opened or closed for group change. The empty schiffli-shuttle is removed and a loaded schiffli-shuttle inserted.

Abstract: The apparatus for controlling the warp thread tension by positional displacement of a back rest on a loom includes a swivelling lever mechanism with a rocking lever which carries the shaft of the back rest and which rocking lever is controlled by a cam plate or disc. The apparatus also includes additional members effecting an additional warp thread tensioning by an additional positional displacement of the back rest during the start-up operation of the loom. The swivelling lever mechanism further includes a connecting element which serves for altering the relative distance between the cam plate or disc and the rocking lever carrying the shaft of the back rest. The relative length of the connecting element is variable by a temporarily operative actuating device. These measures permit a very simple and functionally reliable concept of the additional members of the apparatus.

Abstract: A embroidery framework is displaceable in vertical and horizontal directions by related drives and contains a circumferentially closed embroidery frame. This embroidery frame is supported at supports which are vertically displaceable by a vertical drive of the related drives. A side member of the embroidery frame is held in a vertically extending guide rail for displacement in a vertical direction. From the vertically extending guide rail there projects a horizontal bracket which conjointly with such guide rail forms a T-shaped constructional unit resistant to bending. This constructional unit is guided in horizontal direction at a stationary machine stand. The horizontal drive of the related drives act upon the constructional unit comprising the guide rail and the bracket.

Abstract: The borer apparatus for an embroidering machine comprises a device for removably mounting an exchangeable borer implement on a borer support. The exchangeable borer implement is secured against rotation and is axially fixed by a pivotable hairpin spring which facilitates the replacement of the exchangeable borer implement. The exchangeable borer implement is inserted with its shaft into a sliding or close fitting bore in the borer support and a stop member in the close fitting bore engages an end or head groove of the shaft of the exchangeable borer implement. The shaft is subjected to the action of the hairpin spring in order to secure such shaft against inadvertent rotation. The stop member in the close fitting bore is formed by a pin or sleeve which penetrates and protrudes out of at least one side of the borer support and whose free end forms a biasing stop for the free end of the outwardly pivotably positioned hairpin spring which fixes the exchangeable borer implement in an axial direction.

Abstract: A relatively great number of embroidering locations with the appropriate embroidering implements are arranged in at least one row. The embroidering implements are capable of being coupled to and uncoupled from the embroidering implement drive of the embroidering machine according to a predetermined repetition and color-change program by electromagnetic actuation devices. Therefore, according to the invention, a so-called group-switching of the embroidering locations, respectively of their electromagnets, is performed such that groups of a few embroidering locations, respectively their electromagnetic actuation devices, form switching groups or units. The electromagnetic actuation devices of each switching unit are connected in parallel at their input sides. An input conductor common to the switching unit connects them to the embroidering location control device.

Abstract: A regulation device for the rotary drive of a warp beam of a weaving machine for producing as uniform as possible a tension force on an unwinding material or group of warp threads conducted to a weaving device and then to a fabric take-up device. A tachometer is associated with a power regulator arranged ahead of the motor of the rotary drive as a momentary value transducer and comprises a generator for generating a signal corresponding to the tension force or tensile stress in the material or warp threads as well as a further generator for generating a signal corresponding to the take-up speed of the fabric being woven from the unwinding material or threads. These two signals are connected to a multiplier stage whose output signal is conducted to the power regulator of the rotary drive as a reference value.

Abstract: A freely rotatably mounted roll body couplingly engageable with a brake shaft comprises an exchangeable thread brake liner. The rotatable roll body carrying the thread brake liner in a groove is exchangeably mounted between stationary guide discs which extend radially beyond the roll body on both sides and form a radial continuation of walls of the roll body, laterally defining a thread groove with their radially protruding portions and between which the roll body is exchangeably arranged.

Abstract: The needle thread-break monitor for embroidery machines comprises a double-armed rocking lever acting as a switch in an electrical circuit of an alarm system. The rocking lever is mounted on a bearing shaft forming one pole or terminal of the switch. The other pole or terminal of the switch is formed by a limit or abutment shaft arranged substantially vertically above and extending substantially parallel to the bearing shaft. The arm of the rocking lever not having a thread guide cooperates with the limit shaft, which carries a sleeve of electrically insulating material forming a stop limiting the open position of the switch. The arm of the rocking lever having a thread guide cooperates with the sleeve. The sleeve is rotatable between a terminal or limit position on the terminal or limit shaft enabling electrical contact and another limit position inhibiting electrical contact. The sleeve serves as a support for a needle thread in the relaxed or non-tensioned state.

Abstract: A relatively great number of embroidering locations with the appropriate embroidering implements are arranged in at least one row. The embroidering implements are capable of being coupled to and uncoupled from the embroidering implement drive of the embroidering machine according to a predetermined repetition and color-change program by electromagnetic actuation devices. The pattern and machine-function control of the embroidering machine is performed via a data carrier whose reading and evaluation unit controls a pattern and machine-function control device. Data for the repetition and color-change program are also placed on this data carrier for pattern and machine-function control. Suitable further data are also placed on this data carrier for actuating a switch associated with the reading and evaluation unit for transmitting the repetition and color-change program to an embroidering location control device connected to the electromagnetic actuation devices of the embroidering implements.

Abstract: A shuttleless weaving machine employs filling-yarn transfer at the center of a shed from a first gripper system advanced from one side to a second gripper system approaching from the other side. The yarn transfer is implemented by opening and subsequently closing the clamping means of the gripper systems by means of control levers which are made to enter from the outside through the warp threads into the shed. The control levers are mounted at fixed locations and are so shaped and can be so pivoted from an operational position within the shed into a rest position below the shed that, when the reed beats up, the reed stay can pass unhindered over the control lever. A common shaft carries both the control levers and cam means for actuating the control levers. Actuating means transmitting actuating motion from the cam means to the control levers are mounted on pivot means arranged in spaced parallel relationship to the common shaft.

Abstract: In a terry cloth weaving machine in which a horizontal translation of both warp thread systems of the upper shed and of the lower shed, together with the already woven fabric, takes place for the formation of loops and in which an apparatus for tucking or laying-in tucked or laid-in selvedges is arranged at each side of the machine for the fabrication of tucked or laid-in selvedges in the woven fabric, the tucking or laying-in needles of which tuck or lay the free ends or pick ends of the inserted weft threads back into the weaving shed, an apparatus for fixing the position of the apex of the weaving shed at least over the width of the associated tucked or laid-in selvedge is arranged at each of the sides of the machine. Each apparatus for fixing the position of the weaving shed apex comprises two bars or straight-edges parallel to the edge or fell of the fabric and to the apex line of the weaving shed, one of which engages the corresponding tucked or laid-in selvedge from above and the other from below.