Abstract: A method for starting a group of looms each of which has a control circuit in electrical connection with a central control device. The method includes the steps of outputting operation command signals from the central control device respectively to the control circuits of the looms in a predetermined order, and successively operating each loom in response to the operation command signal upon completing preparation for starting the loom, thereby automatically starting the looms in the predetermined order without requiring operator action for each loom.

Abstract: A controlling and supervising system for a loom controlled with a network of computers connected in a network. A host computer provides data files containing dispatching data and production instructions for various units and devices. A data-communication personal computer connected to the network receives data transmitted from the host computer in file and loads the received data into the various units and devices via the network. A plurality of supervisory personal computers are provided for storing the data from the data-communication personal computer and further downloading the data as required, with the addition of operating data, and also supervising predetermined operations and functions of the loom in accordance with signals received from the loom.

Abstract: In a looming system or method, warp yarns are mounted on a loom by the following four steps. At a first step, warp yarns of a full warp beam are drawn through a warp holding unit including a warp dropper unit, a heald unit and a reed. Then, at a second step, the full warp beam is mounted on the loom. At a third step, a warp tension is sensed between the warp beam and the warp holding unit. At a fourth step, the warp holding unit is moved toward the loom and mounted in the loom while rotating the warp beam so as to reduce a deviation of the sensed warp tension from a predetermined standard.

Abstract: A looming apparatus for a loom includes in general a warp beam handling unit for attaching and removing a warp beam to and from the loom, and a handling unit for supporting loom components including at least heddles and a reed threaded by the warp from the warp beam. A supporting platform is provided on a truck so as to be reciprocated between a stand-by position and a looming position. The warp beam handling unit and the handling unit for supporting the components threaded by the warp yarn are installed on this supporting platform. In the working position of the truck for the loom, the supporting platform is expanded from the truck to the looming position on the loom for performing the required operation at this position. After termination of such operation, the supporting platform is returned to the stand-by position on the truck, while the truck is moved to the looming preparatory position.

Abstract: A device for mending and trimming broken warp yarn includes a yarn holder mounted on a moving member for holding a free end of a mending yarn tied to a broken warp yarn. When a warp yarn is broken during the operation of the loom, one end of a mending yarn and the broken end of the broken warp yarn extending from the warp beam are tied together, and the other end of the mending yarn is passed through a corresponding heddle and a corresponding gap between the dents of a reed, and then the loom is restarted. A signaling device generates a signal after detecting the arrival of the free end of the mending yarn which was not woven into the cloth after the loom was restarted. The free end of the mending yarn is cut off automatically from the woven cloth by a cutter in accordance with the signal from the signaling device while the loom is in operation. A controller is connected to and controls all of the elements of the mending and trimming device.

Abstract: A centralized loom control method employing a host computer for controlling the operation of a plurality of looms. Data base including data accumulated by recording past actual weaving conditions in stored in a memory device connected to the host computer. The host computer determines standard set value for which the looms are to be set by processing the specifications of a fabric to be woven entered therein and data fetched from the memory device through predetermined calculation or interpolation. The host computer compares a standard operating speed among the standard set values with a target operating speed at which the loom is to be operated, and changes the standard set values according to the result of comparison to provide new standard set values suitable for operation at the target operating speed.

Abstract: An automatic cop replacing apparatus for a shuttle-type loom with which a cop contained in the shuttle is automatically replaced, including tying the threads together of the old and new cops, and requiring no operator intervention. The apparatus includes a hand for gripping the cop, a rotary arm plate on which the hand is mounted, a drive device for rotating the rotary arm plate and for linearly moving the rotary arm plate in the axial direction with respect, thereto and a drive shaft for moving the rotary arm plate to an exchange position for the cop. A thread tying device holds and ties together the threads of the old and new cops.

Abstract: A gripper transportation system for a shuttleless loom, in which in the guide for the flexible tape, in a position in close proximity to the control sprocket, there is provided a transverse slot through which a solid stick of porous synthetic material impregnated with lubricating grease and/or oil passes and is urged against said tape by a spring of adjustable tension.

Abstract: The apparatus comprises, on the one hand, a head (1) carrying a buckle (8) and a guiding rod (7) ended by a knob (12), and, on the other hand, a unit (13-20) which can freely slide along the rod (7) and which is composed of a hollow handle (13) molded in one piece with a bar (14) to which are jointed two hooks (16, 17), of unequal lengths, and which carries a needle (19). To tie a Smyrna stitch on a canvas, the apparatus, furnished with a pile thread (23), is pushed against the canvas, firstly, so as to fully insert the buckle (8) between two of its threads, and then, so as to cause the movable unit (13-20) to slide along the rod (7), so that the hooks (16, 17) first cause the pile thread (23) to successively pass on both sides of the canvas threads between which the buckle (8) is engaged, and then introduce the ends thereof one after the other in the buckle (8).

Abstract: A process for locating weft thread defects in woven fabrics includes using a macro (close-up) lens and video camera to produce an enlarged image of the fabric, and then observing and evaluating the weft pattern from the video generated image. Transmissive and reflecting illumination may be used on the fabric to enhance the video image. Evaluation and measurement of weft thread positions is carried out by direct visual observation or by using computerized pattern recognition systems with micro processor techniques involving digitizing the video image. A relaxation defect of weft thread is determined by measuring variation between weft thread spacing when the fabric is viewed from two different viewing angles.

Abstract: A wireless let-off and take-up control system for controlling the let-off motion and take-up mechanism of a loom or looms by wireless. The control system comprises a portable transmitter or transmitters, and a receiver or receivers each associated with the controller of a loom for controlling the let-off motion and take-up mechanism of the loom. Instructions for controlling the let-off motion and the take-up mechanism are given by wireless by operating the transmitter through the receiver to the controller of the loom at an optional position around the loom, so that a single operator is able to observe the movement of warps and, if necessary, to vibrate the warps in order to enable the warps to move smoothly past the droppers, the mails of heddles and reed of the loom in preparing a new warp beam for weaving operation on the loom.

Abstract: The carpet-knotting apparatus comprises a head (1) solid with a guiding rod (7) and carrying a buckle (8). It also comprises a movable unit (12 to 16) composed of a control handle (12) made in one piece with a bar (13), to which two hooks (15, 16) are jointed. A ball (27) is located between the rod (7) and the handle (12). That ball is girled by the edges of an opening (29) of a sleeve (28), which a spring (30) keeps in contact with a ring (22). That ring forms part of a releaser (20) which extends through head (1). At rest and when the buckle (8) enters the canvas (32, 33, 34), the sleeve (28) wedges the ball (27) between the notch (24) and the wall of the groove (25), thereby locking the movable unit with respect to the head (1). When the buckle (8) fully crosses the canvas, the releaser (20) is pushed by the latter. The ring (22) moves the sleeve (28) which conceals the ball (27) on the bottom of the notch (24).

Abstract: A loom having a drum type weft reservoir including a drum on which a predetermined length of a weft yarn is wound to be measured and reserved prior to weft picking. The weft reservoir is automatically prepared for loom starting by merely operating a manual switch. The local includes a clutch which is engaged at a predetermined operational phase of the loom to drive the weft reservoir. If the manual switch is actuated when the clutch is disengaged, then the clutch is engaged at a second time substantially later than the first time at which the predetermined operational phase is reached. Any cut, broken or unnecessary weft yarn remaining wound on the drum when the switch is actuated is removed during the interval between the first and second times, e.g. by pulling the weft yarn from the side of a weft inserting nozzle.

Abstract: A loom frame comprises side wall assemblies (9) on the narrow sides of the loom (1) and cross-members (13-16) interconnecting the side wall assemblies (9) and extending parallel to the long sides of the loom. The side walls (9) of the frame (8) are each in at least two parts (10, 11) secured to one another by at least one connecting bar (12). The same side wall parts (10, 11), but different connecting bars (12), flanges (121, 122, 125) and rests (123, 124) can be used to construct different loom frames. Different frames can therefore be produced at reasonable manufacturing costs from just a few variable parts.

Abstract: In a system for removing a faulty weft on a loom a mobile weft catcher unit engageable with a weft of an open shed is driven for successive removal of the next and faulty wefts by operation of a controller which generates phased instruction signals in response to detection of abnormal weft insertion.

Abstract: The optimum control conditions for a plurality of looms are simply estimated with the use of a trial loom. Hereby, the plurality of looms are operated under a centralized control method. The looms, even if they vary in their respective characteristics, can be effectively operated by correcting standard control data for controlling the looms in response to variations of the loom characteristics. The present centralized control method can save much labor and time to improve productivity of the looms, by properly eliminating elaborate trial weaving processes.

Abstract: A method of controlling a weaving machine which includes a shedding device with yarn guiding eyelets, an electronic control device for the shedding device, a warp let-off device and a fabric take-off device, the electronic control device having a program memory providing a weaving program with weaving program steps and an auxiliary program, comprises stopping the weaving machine in a shed by means of a stop signal, switching by means of the auxiliary program to inverse weaving the shedding device and the weaving program step of the shed in which the weaving machine has stopped, returning by means of the auxiliary program the weaving machine to the next preceding shedding crossing point, stopping by means of the auxiliary program the weaving machine in this next preceding shedding crossing point so that the yarn-guiding eyelets are placed in a middle position, switching by means of the auxiliary program the weaving machine from inverse weaving to normal weaving according to the weaving program, and restarting

Abstract: The safeguard device has a light beam emitter secured to a pivotal lever for movement between an operative position and a retracted position. In addition, a plate is pivotally mounted relative to the lever to move with the lever. The plate is formed with a recess to expose the light beam when the lever is in an operative position and is otherwise shaped to mask the emitter when the lever is pivoted into a retracted position. Masking of the light beam serves to signal a need for interrupting the operation of the weaving machine.

Abstract: The cross beam of the loom is provided with a retaining bar in which at least one panel-like or board-like switching unit is slidably mounted. Suitable acess openings are provided in the retaining bar to permit access to the control elements on the switching unit. Panel like spacing elements are employed to locate the respective switching units within the retaining bar and electrical plugs are provided for connecting the switching units to a flat cable extending along the cross beam.

Abstract: The vibration-damping mounting for the weaving machine comprises a number of bearing elements which rest on the weaving shed floor. The bearing elements are relatively rigid vertically and are resilient only horizontally. For good horizontal vibration damping, the spring rate of the bearing elements referred to the total mass of a weaving machine must not exceed the value ##EQU1## horizontally, while the spring rates of the bearing elements should be at least 10 times greater. With this kind of mounting, which is of more use particularly for weaving machine frames not having great torsional resistance, the environment near a weaving machine group experiences in practice surprisingly low amplitudes of vibration which are many times less than the amplitudes of vibration associated with a rigid machine mounting.

Abstract: A weaving machine having a lubricating system for lubricating the surface of picking instrumentalities during the operation of the weaving machine by supplying controlled droplets of lubricant in the amount of 0.01 through 0.05 cc at predetermined intervals and at consistent pressure in the range of from 50 to 300 psi.

Abstract: A device for treating a surplus warp yarn drawn from a warp beam of a loom consists of a drive member rotatable by the warp beam. A rotational force of the drive member is transmitted through a transmission device to a driven member. The driven member is secured to a take-up reel disposed separate from the warp beam. The surplus warp yarn drawn from the warp beam is wound up on the take-up reel rotatable with the driven member, thereby preventing the surplus warp yarn from getting entangled with regular warp yarns drawn from the warp beam.

Abstract: A weaving machine having a filling breakage detector for generating an error signal upon breakage of a filling thread. This error signal then stops the weaving machine. A pick finding process is then initiated in which the weaving program is set back and then blocked. After removal of any filling thread in the open shed, the weaving machine is operated until the preceding shed is opened enabling the removal of the filling thread. If this is the ruptured filling thread, it is replaced by a new filling thread, the weaving program is unblocked and the weaving machine is operated in its normal sequence. If the filling thread is not ruptured once or if another ruptured filling thread is detected in a preceding shed, the pick finding process is repeated. The cloth takeoff and the warp letoff are also set back correspondingly with the weaving program.

Abstract: Vibrations of heavy equipment, such as textile machinery, are isolated, that is prevented from entering into the supporting floor, by inserting a vibration isolating device between each equipment frame member forming a machine foot and the floor. The device includes a hydraulic damper and up to three sets of springs, preferably sets of concentrically arranged helical springs. The springs are mounted between upper and lower spring mounting elements. The spacing between these upper and lower mounting elements is adjustable by a threaded bolt for adapting the load bearing capacity of each set of springs to the respective machine foot load. Thus, individual springs in a set or an entire spring set may be withdrawn from a load bearing function for providing each machine foot, for example of a weaving machine, with the individually required vibration insulation at each machine foot.

Abstract: Practice of an auto-repair operation on a loom is automatically prohibited when the frequency of auto-repair operation exceeds a preselected rate in order to avoid production of off-grade cloths otherwise caused by continuously repeated formation of weaving defects.

Abstract: A system for detecting the distribution of flow velocity is used in combination with an air jet loom of the type wherein auxiliary nozzles eject air into an air guide channel formed on the front side of a reed. The system consists of a carrier engageable with a rail disposed parallel with the reed and movable along the rail. The carrier carries a flow velocity detector whose flow velocity sensing section is located in the air guide channel, thereby effectively detecting the distribution of flow velocity of air stream throughout whole the air guide channel.

Abstract: The projectile weaving machine is provided with a torsion bar arrangement wherein oil is delivered to a central part of the torsion bar during operation. The oil circuit includes an oil entry in or near the torsion bar mounting and an annular chamber which is defined by a casing part about the torsion bar. A cooler is also provided in the oil circuit for cooling of the oil and the hydraulic brake assembly for the torsion bar is incorporated in the oil circuit.

Abstract: Apparatus and method to detect high tension in a web material being taken-up and cutting off the take-up device upon such detection to prevent stretching and necking of the fabric being handled. The detection device provides a time delay between detection of the condition of high tension and deactivation of the fabric take-up apparatus.

Abstract: A compact, self-contained device for direct mounting on a knitting or other textile machine for monitoring and displaying the machine's operating efficiency. A first digital LED continuously displays machine operating efficiency. During machine operation, a second digital LED displays the number of previous machine stoppages and, during machine stoppages, displays the elapsed time of the prevailing machine stoppage. Operating switches permit selective display on the second LED of either the total elapsed time of device operation which forms the time base for the efficiency value or the duration of the longest previous machine stoppage.

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: A method and an apparatus for automatically exchanging cloth rollers without stopping the loom, including: transferring a cloth roller from a truck to a loom when the cloth roller has taken up a given amount of cloth; mounting an empty roller on the loom while the cloth roller continues the take-up motion on the truck; and cutting the cloth between the truck and the loom to allow it to be taken up by the empty roller.

Abstract: The suspension for the weaving machine employs vibration-damping bearing elements which have vertical spring constants which differ from each other by at least one order of magnitude. In addition, the sum of the horizontal spring constants of the bearing elements are, at most, one tenth of the greatest vertical spring constants of the bearing elements. The bearing element on the warp beam side is made as a layer bearing while the soft bearing element on the cloth beam side is in the form of an air spring which can be adjusted.The suspension achieves a defined static position of the weaving machine as well as a deep tuning of the suspension system of the machine/bearing elements.

Abstract: A power loom for the manufacture of woven fabrics, in particular woven wire fabrics and felts for use in papermaking machines, is provided with a computerized pattern recognition system for monitoring the warp, the fabric, the edge of the fabric, the density of the weft, and so on. The device includes a video camera and computerized image processing means. By analyzing a picture taken near an edge of the fabric, digital information concerning the position of the edge of the fabric, the weft density, and so on, can be obtained. The digital information is adapted to be used in an open or closed control system for positioning the edge of the fabric in correct position, after an interruption of fabric through the loom, before a restart of the fabric feed. Digital information concerning the actual weft density can be utilized as the actual value in a weft density control system using the driving means of the warp beam of the loom as the executive members via a tensile stress control applied to the fabric.

Abstract: An overhead loom takeup is illustrated having a first downward run of cloth wherein the cloth is moved thence upwardly and over a guide roll prior to being moved generally longitudinally over compensator means to a surface wound roll positioned generally above the warp beam. Doffing means are provided overhead of the beams in the aisles between adjacent warp beams and include rail carried transport means.

Abstract: An overhead apparatus is provided for conveying elements to and from each weaving machine of rows of weaving machines. The apparatus includes a movable rack which is adjustable width-wise and which carries depending actuators with gripping elements at the lower ends for engaging warp beams and cloth beams. A transverse beam is also provided with depending actuators which carry clamping jaws for engaging the heddles for raising and lowering of the heddles.Additional actuators may also be provided to carry nozzles for pneumatic cleaning or lubrication of the weaving machines.

Abstract: The progressive distributor contains a control piston which is slidable in a cylinder. The piston contains a main channel and a plurality of radially disposed distribution channels for distributing lubricant. The cylinder has feed channels which are aligned with feed channels in a housing of a machine part to be lubricated and are arranged in offset relation to the distribution channels of the piston. The respective distribution channels and feed channels are arranged so that during movement of the piston in the cylinder, the various feed channels are progressively supplied with lubricant.

Abstract: The tensioning beam assembly has a tensioning beam and/or support beam mounted in step bearings located across the width of the weaving machine. Sagging of the tensioning element is eliminated and reduced diameter tensioning elements and support beams can be used.The tensioning element may be formed as a solid shaft which is rotatably mounted in individual step bearings on the support beam or fixedly mounted by connecting pieces to the support beam. In one embodiment, the tensioning element is in the form of a plate which is secured directly to the support beam and which has a curved outer end over which the warp threads pass. In still another embodiment, the tensioning element is in the form of a U-shaped plastic strip which is mounted about a projection extending along the support beam.

Abstract: This weaving machine comprises a device for removing faulty weft threads from the weaving shed or the woven cloth respectively, also if they have already been cut from the yarn supply during the weaving cycle. The device has a reciprocatable mechanical removing member (8) by means of which also fibrous yarn threads may be removed from the beating up line. Furthermore the device comprises a catching element (10) for threads which have already been cut, which element is adapted to clamp and take along the thread.

Abstract: In the rapier or gripper weaving machine a rapier or gripper rod is moved to-and-fro by a drive gear or wheel. An oil lubricating device is provided whose spray nozzle opens in the vicinity of the drive gear or wheel. This spray nozzle is connected to a pressure conduit located at the exit or outlet side of a mixing chamber. In the mixing chamber, a predeterminable quantity of oil taken from an oil reservoir can be admixed with a continuously transmitted flow of compressed air. A timer serves for the periodic activation of an oil dosing and injecting device located upstream or forwardly of the mixing chamber. The dosing action controlled by the timer periodically mixes a predetermined volume of oil into the continuous flow of compressed air being supplied to the spray nozzle. The spray nozzle is a molecular atomizing nozzle.

Abstract: The lubricator is disposed at the picking end of the picking element return device and has a guide duct for receiving a picking element prior to the next pick. The lubricator has oil mist nozzles which face only those surfaces of the picking element which will rub on the guide teeth in the next pick.Very low-quantity lubrication or lean lubrication is feasiable and soiling of the fabric by lubricant is obviated. The lubrication effect is sufficient to obviate metal abrasion between the picking element and the guide teeth so that soiling of the fabric by abraded metal can be avoided.

Abstract: An oil lubrication system, especially for knitting machines includes a plurality of electromagnetically driven piston pumps, one of which is assigned to each individual lubrication site operated by and exciting current pulses of adjustable pulse-recurrence frequency. Each piston pump has a scanning device which produces a receipt pulse during the working stroke when the pump piston reaches its end position. The current pulse and receipt pulse are applied to a monitoring device which provides an output signal if the receipt pulse is not applied within a certain time after the current pulse. An indicator light flashes at each current pulse and switches to a permanent signal when an output signal is produced. An oil storage vessel feeding the pumps can be provided with a filling state monitor when produces an electrical oil deficiency signal when the oil level falls below a predetermined minimum. Both the oil deficiency signal and the output signal are applied to a disconnecting unit which stops the machine.

Abstract: The weaving machine has a device which is movable in the weft direction and comprises a loosening element adapted to be moved transverse to the weft direction and a catching element movable perpendicular to the cloth plane. Thereby also weft portions may be removed which have already been cut off from the yarn supply as well as broken weft portions.

Abstract: Device for electronically controlling pneumatic thread tensioners or other related components of looms of the kind comprising a cam, the motion of which is synchronized in relation to the rotation of the crankshaft of the loom and which produces a signal by means of an electronic detector, characterized in that it also comprises a generator of electric impulses which is excited by the aforesaid signal for emitting a train of impulses with an adjustable frequency by means of which per operational cycle, is being effected the control of the concerned components of the machine.

Abstract: For ideal stoppage of loom rotation at a constant crank angle, initiation of braking action on loom rotation is always automatically and properly timed on the basis of initial stop lag angle representative of the current braking function so that the resultant actual stop angle should match the preselected stop crank angle and, more preferably, the initial stop lag angle is renewed to cover gradual deterioration in the braking function.

Abstract: In a jet loom in which a weft yarn is inserted through the warp shed by a jet of fluid such as air, the thickness of the weft yarn is detected prior to insertion continuously or at intervals with a yarn thickness detector, and the pressure of ejection of the fluid jet is controlled by a result of such detection so as to be optimum for the weft insertion. The jet of fluid is ejected from a nozzle member under the controlled pressure to insert the weft yarn reliably without insertion failures.

Abstract: The pulse lubricator is constructed to deliver oil sprays to various lubrication points of a power loom and includes a plurality of atomizers. Each atomizer includes an atomizer head and a macro-separator for separating out large droplets of lubricant. A catch basin is disposed below the macro-separator of the atomizer and is in sealed relation to the lubrication reservoir. The catch basin has a check valve in the bottom which is closed during a pulse so that constant pressure is maintained in the spray. Between pulses, the check valve may open to maintain the level of lubricant in the catch basin at the same level as the lubricant in the reservoir.

Abstract: A demountable sealed joint (1) for the fluid tight connection of a sheet member (2) to a support (3), in which the latter is provided with a dovetail groove (5) engaged by a bead (4) of substantially the same shape as said groove and forming a portion of the sheet member (2) and substantially rigid in a transverse direction; the groove (5) comprising two longitudinal undercuts (6, 7) engaged by respective longitudinal extensions (14, 15) of said bead (4) and of which one is more pronounced than the other, the sheet member (2) being connected to the bead (4) substantially at the base of the extension (15) engaged in the more pronounced undercut and at a predetermined distance from the other extension (14).

Abstract: A method and apparatus for lubricating a machine is provided. In an embodiment a method is provided for generating pressure in a lubricating liquid and providing said liquid to a lubricating station at predetermined intervals. In another embodiment an apparatus is provided for pressurizing lubricating liquid in a reservoir and directing said liquid to a lubricating station.

Abstract: The invention concerns a carpet knotting instrument (1) for canvases (4) wherein two canvas threads guided parallel to each other at a small spacing are arranged at a slight angle to each other so that an aperture is created thereby.In order to render such a carpet knotting instrument universally applicable and to make to more reliable and easier to handle, such a carpet knotting instrument comprises the following features:(a) a knotting needle (2) with an oblong needle eyelet (3), said needle being insertable between two canvas threads (5, 6; 7, 8) guided parallel to each other and at a small spacing,(b) drive means (9-21) for the two legs (27, 28) of the knotting thread (26) bent into the shape of a loop in order to guide the two legs from the two opposite sides of the needle eyelet (3) through same.

Abstract: An on-loom take-up apparatus having increased cloth roll capacity is illustrated wherein means are provided for maintaining the loom supported in raised position while removing obstructions to the cloth roll as would limit the size of the cloth roll as would otherwise be permitted by the raising of the loom. A separate D.C. drive is provided and a constant torque control is provided for driving the take-up roll responsive to tension in the cloth through a positive drive arrangement.