Patents Examined by Henry S. Jaudon
  • Patent number: 4913193
    Abstract: A heddle bar having a cross-sectional profile for supporting heddles in a heddle frame. The heddle bar has a supporting rib for engaging a heddle bar support channel in each of the slats making up the heddle frame assembly in an interference fit therewith to make its removal difficult but not impossible. The heddle support bar is not bonded or glued to the slat.The heddle bar may be shaped to support any type heddle, and may be T-shaped or shaped to support J-shaped heddles.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: April 3, 1990
    Assignee: Steel Heddle Mfg. Co.
    Inventor: Gene E. Faasse
  • Patent number: 4913194
    Abstract: A lightweight frame slat for use in a heddle frame assembly. Each of said slats comprises an upper hollow portion and a heddle bar support portion integral with and extending from the hollow elongated portion. The hollow portion is made up of a vertically extending back portion and a vertical front portion so that when the front portion is in place three longitudinal cavities are formed. Adjacent each of the edge of the hollow elongated upper portion is disposed elongated stiffening bars of a carbon fiber reinforced stiffening element. The intermediate cavity between the edge cavities is filled with a strip of ridged foam to add structural stability to the slat without greatly increasing its weight.Extending from, and integral with the back portion of the slat is a heddle bar support portion which has extending from it near its bottom edge two horizontal ledges which define a heddle bar support channel.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: April 3, 1990
    Assignee: Steel Heddle Mfg. Co.
    Inventor: Charles F. Kramer
  • Patent number: 4911207
    Abstract: A method for monitoring warp thread breaks on weaving machines includes the steps of locating broken warp threads and storing the number of broken warp threads in a memory as a function of the postions of the breaks.
    Type: Grant
    Filed: September 2, 1988
    Date of Patent: March 27, 1990
    Assignee: Picanol N. V.
    Inventors: Dirk Gryson, Joos Waelkens, Henry Shaw
  • Patent number: 4911208
    Abstract: A weft yarn measuring method controls the picking device of a fluid jet loom so as to pick a weft yarn of a predetermined length in each picking cycle. In releasing loops of the weft yarn wound on the storage drum of the picking device, the retaining pin of the picking device is controlled so that only one of the loops of the weft yarn is unwound at each reciprocation of the retaining pin, and the reciprocation of the retaining pin is repeated a plurality of times to unwind accurately a plurality of loops of the weft yarn corresponding to a predetermined length of the weft yarn necessary for one picking cycle.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: March 27, 1990
    Assignee: Tsudakoma Corp.
    Inventor: Koyu Maenaka
  • Patent number: 4909283
    Abstract: A tucking-in device for weaving machines includes a thread clamp (10) for gripping the free ends (16) of inserted weft threads (4), and a tucker arm (12) for drawing the thread ends (16) from the closed clamp (10) back into the shed (6). The tucking-in device includes a pneumatic cleaning mechanism (14) for cleaning at least the thread clamp (10) by means of an air jet (15).
    Type: Grant
    Filed: September 2, 1988
    Date of Patent: March 20, 1990
    Assignee: Picanol N. V.
    Inventor: Eddy Verclyte
  • Patent number: 4909286
    Abstract: A method for regulating the supply of weft thread on weaving machines includes the steps of winding the weft thread from a thread supply by means of a draw-off roller driven by a motor, supplying the thread to an accumulator, and controlling the draw-off roller motor by a pulse train generated on the basis of a set value and a second pulse train whose frequency is proportional to the main shaft of the weaving machine. By adjusting the set value, the speed of the draw-off roller can be adjusted to account for such factors as thread type, thickness extensibility and diameter, and also thread supply package diameter and variations in thread draw-off speed. A device for implementing the method of the invention includes, in a preferred embodiment, a cam, a set value setting unit, a shaft pulse generator for generating the second pulse train, a buffer, and a counter which adds the set value and the second pulse train to generate the first pulse train.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: March 20, 1990
    Assignee: Picanol N.V.
    Inventors: Bernard Decock, Marc Wyffels, Frank Ampe, Philippe Van Bogaert
  • Patent number: 4909285
    Abstract: A thread clip including a clamping mechanism (1) consisting of a first jaw (2) and a second jaw (3); a spring mechanism (4) which presses the clamping mechanism jaws (1) together; an electromagnetic device (5) which can open the clamping mechanism against the force of the above-mentioned spring mechanism (4); a cam mechanism (6) which can close the clamping mechanism (1) against the force of the electromagnetic device (5); and a mechanism (7) which on closing of the clamping mechanism (1) by means of the cam mechanism (6) presses the different elements of the clamping mechanism (1) against each other with a certain clamping force.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: March 20, 1990
    Assignee: Picanol, N.V.
    Inventors: Philippe Van Bogaert, Frank Ampe, Jozef Verhulst, Hugo Markey
  • Patent number: 4907627
    Abstract: A shed retaining and weft guide member for multiple shed, fluid jet looms includes a tubular section with mating male and female ends, a thickened end wall portion, a weft thread exit slot biased to a closed position during weft insertion, and a tapered bore section, all provided to increase the efficiency of fluid jet weft thread insertion by minimizing loss of fluid pressure and momentum.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: March 13, 1990
    Assignee: Picanol NV
    Inventor: Thomas F. McGinley
  • Patent number: 4905741
    Abstract: A pneumatic loom having at least two blow nozzles arranged in a bundle, is equipped with a weft thread insertion alignment device (2) located in a fixed position between the blow nozzles and the weft thread guide channel formed by the reed teeth. The alignment device (2) has an alignment slot having a funnel-shape receiving the weft threads at a wide inlet opening and leading the weft threads to a narrower outlet opening. The alignment slot extends along at least a portion of the path followed by the reed teeth on their beat-up motion. One end of the alignment slot is open toward the weft thread cutting scissors for exit of the weft threads. Weft threads waste is kept very low by the location of all relevant components close to each other. The effectiveness of the scissors is not impaired at all. The time available for the weft thread insertion is increased which means that the r.p.m. of the loom can be increased.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: March 6, 1990
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Adnan Wahhoud, Rudolf Riezler
  • Patent number: 4905740
    Abstract: A device for forming a selvedge on a cloth on weaving machines, of the type which consists of at least one mechanism (8, 9, 10) for forming one or more selvedges (4, 5, 6, 7), where tucking in the thread ends (42, 43) of the cloth or cloths (2, 3) is done by means of components (34) mounted above the cloth (2, 3) or above the warp thread (12), and where said mechanism (8, 9, 10) has a drive (58) situated partly above and partly below the plane of the cloth (2, 3), is characterized in that the mechanism (8, 9, 10) for forming a selvedge (4, 5, 6, 7) comprises at least two connected, dismountable parts, namely a bottom part (54) and a top part (55) respectively, where said bottom part (54) is situated entirely below the plane in which the cloth (2, 3, 72) is located.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: March 6, 1990
    Assignee: Picanol N.V.
    Inventor: Eddy Verclyte
  • Patent number: 4905739
    Abstract: This invention relates to a drawing system for controlling the heddle frames of weaving mechanisms of the negative type, wherein the connection between each oscillating lever and the cable of the weaving mechanism and the return spring register which corresponds thereto is ensured by a secondary cable which winds on a part of the lever concentric to the pivot axis thereof, in order to ensure for the register a perfectly linear displacement.
    Type: Grant
    Filed: December 29, 1988
    Date of Patent: March 6, 1990
    Assignee: S.A. Des Establissments Staubli
    Inventor: Jean-Paul Froment
  • Patent number: 4905737
    Abstract: A method and apparatus for separating a broken warp thread at the warp stop motion from the warp sheet on a weaving machine in which the warp stop motion includes several rows of drop wires, the method including the step of extracting a loop in the broken warp thread caused by a sag as a result of the corresponding drop wire falling away from the fallen drop wire. The apparatus includes a series of suction or blower nozzles or grippers which are sequentially activated to pass the loop between the adjacent nozzles or grippers toward the side of the warp sheet.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: March 6, 1990
    Assignee: Picanol N.V.
    Inventor: Dirk Gryson
  • Patent number: 4903738
    Abstract: A Jacquard emulator for operating the pins of a Jacquard mechanism as is used in the textile industry. The emulator has a number of disks mounted on the shafts of respective stepper motors. The disks have a number of holes therein so that when the disks are brought into contact with the pins by axial movement, predetermined pins align with holes in the disk so that required patterns of pins are actuated. The stepper motors are controlled to orient the disk to vary the pattern of pins actuated as required by a desired program.
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: February 27, 1990
    Assignee: Wilcom Pty. Ltd.
    Inventors: Robert G. Pongrass, Mark A. Buchen
  • Patent number: 4903739
    Abstract: Method for threading a weft insertion device on weaving machines, in particular for threading a weft insertion device of the type which consists of at least one first nozzle (3, 4) mounted beside the sley (7) and at least one second nozzle (5, 6) which moves with the sley (7), where the first nozzle (3, 4) makes an angle with the second nozzle (5, 6) and during normal operation of the weaving machine lies at a distance from it, with the characteristic that the method consists essentially of presenting to one another the thread exit opening (17) and thread induction opening (15) of the first and second nozzles respectively (3, 4; 5, 6), and then leading a weft thread (19, 20) through both nozzles (3, 5; 4, 6); the invention also concerns a device which uses this method.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: February 27, 1990
    Assignee: Picanol N.V.
    Inventor: Jo Tacq
  • Patent number: 4901766
    Abstract: The warp threads in a loom are cooled, in order to prevent damage to the warp threads due to heat generation by the contact between the warp threads and loom components. Such contact can generate temperatures of 50.degree. to 80.degree. C. due to thread friction and thread shifting, whereby capillary breaks of the warp threads are caused so that continued weaving becomes impossible. Such heat generation is avoided by cooling the loom components which contact the warp threads. A cooling fluid is circulated through the warp thread contacting components. The cooling fluid may be a liquid or a gas. At least the leasing or fulling mill is cooled in this manner. The cooling is preferably carried out to such an extent that condensation water forms on the surfaces of the cooled components, whereby the condensation water acts as a lubricant for the warp threads.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: February 20, 1990
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventor: Valentin Krumm
  • Patent number: 4901770
    Abstract: An automatic picking controlling method for automatically controlling the operation of at least the subnozzle groups in a jetting pattern selected on the basis of the actual running mode of a picked weft yarn is arranged such that a plurality of typical jetting patterns respectively corresponding to different running modes of the picked weft yarn for controlling at least the subnozzle groups are initially stored in a storage unit; the running mode of the picked weft yarn is detected in a detection step; a jetting pattern meeting the actual running mode selected from among those stored in the storage unit is read, and the operation of the subnozzle groups is controlled in accordance with the selected jetting pattern for a predetermined period of time.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: February 20, 1990
    Assignee: Tsudakoma Corp.
    Inventor: Yujiro Takegawa
  • Patent number: 4901769
    Abstract: The tuck-in needle of a mechanical selvedge-forming device has a catcher for a yarn end following a needle tip. The catcher is subdivided into an entry zone and a trough screened from the entry zone by a hook disposed towards the trough. In its catching movement the needle is moved only towards the weft yarn so that the yarn moves into the entry zone of the catcher. The weft yarn then slides inclinedly over the outside of the hook until passing by way of the hook tip into the catcher interior. The weft yarn can be drawn into the cloth selvedge in this position. This construction enables the tucking-in to be very simple.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: February 20, 1990
    Assignee: Sulzer Brothers Limited
    Inventors: Hans Zollinger, Mario Tamaro
  • Patent number: 4901771
    Abstract: A casing for weft storage and feeding devices for use in weaving looms comprises a central body housing the motor; and a peripheral arm guiding and supporting the brake unit, the sensor detecting the yarn reserve, and the yarn-guide eyelet. The casing is formed from at least one extruded section length.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: February 20, 1990
    Assignee: ROJ Electrotex S.p.A.
    Inventor: Bruno Maina
  • Patent number: 4901772
    Abstract: Method and apparatus for adjusting the length of the weft thread to be inserted into the shed of weaving looms that provides an automatic correction of the weft thread length during each weaving cycle of the weaving process by adding to or substracting a variable amount of weft thread from the accumulated length of weft thread prior to insertion of the thread into the shed.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: February 20, 1990
    Assignee: Picanol N.V.
    Inventors: Philippe Van Bogaert, Ampe Frank
  • Patent number: 4901768
    Abstract: A picking apparatus includes a sley with a reed assembly fixed thereon, a raceway formed in the upper surface of the sley, a magnetic force-generating device for generating a magnetic force which moves along the raceway, and a shuttle which is attracted by the magnetic force so as to fly along the raceway. The sley has a slot formed therein along the raceway. The shuttle has an engagement hole. The magnetic force-generating device has an extendable and retractable gripping unit which can retract into the engagement hole of the shuttle immediately after the completion of a picking motion. Therefore, the magnetic force-generating device can attract and drive the shuttle during the picking motion. It can be appreciated that the gripping unit can interlock the shuttle and the magnetic force-generating device from the time of the completion of a picking motion until the time of the commencement of the next picking motion.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: February 20, 1990
    Inventor: Huang Chi-Shuang