Sewing Threads Patents (Class 57/903)
  • Patent number: 6905764
    Abstract: A sewing thread made of synthetic fibers is described, whereby the ready-to-use sewing thread has an elongation at break between 25% and 85% and an elastic tensile elongation of between 30% and 95% of the elongation, determined by a measuring strength, corresponding to 70% of the absolute strength of the respective sewing thread. In addition, two methods for making a sewing thread are also described, whereby the sewing thread comprises either a plied yarn or an air-intermingled sewing thread. To produce this sewing thread yarn components with an elongation at break between 25% and 85% and an elastic tensile elongation of between 30% and 95% are selected, whereby thermal and preferably hydrothermal treatment is carried out after the actual yarn production.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: June 14, 2005
    Assignee: Amann & Soehne GmbH & Co. KG
    Inventors: Pierre Hornez, Mathias Wittmann, Karl Greifeneder
  • Patent number: 6491975
    Abstract: A process for bonding filament with aqueous based polyethylene terephthalate or polyurethane bonding agents via a foam delivery system is disclosed. The process includes the steps of: (a) providing a filament; (b) providing a foam prepared by foaming a solution comprising an agent selected from the group consisting of polyethylene terephthalate or polyurethane bonding agents; (c) applying a foam to said filament; and (d) drying and curing said filament.
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: December 10, 2002
    Assignee: Arteva North America S.A.R.L.
    Inventors: Timothy L. Burns, Douglas E. Hirt, Joseph A. Roderiguez
  • Patent number: 6009642
    Abstract: This method provides various high-power-ratio snow removal devices which clear paths narrower than the motor vehicles. We use small, light, low-priced, yet also safe, durable devices to clear the narrow swaths. High power ratios result from applying motor vehicle horsepower to small snow removal devices similar to those found on lawn tractors. Such devices may comprise moldboard plows (FIGS. 3, 9, 10, 11, 15, 16), snow throwers (FIGS. 7 and 13), or combinations of both types (FIG. 12 and 17). Quick-connect and quick-release fittings (FIGS. 3A, 3B, 6, 8, 9A, 9B, 14) position each device for temporary propulsion by a vehicle. The connectors allow quick conversion of the family car to a plowing machine, and when plowing is done, quick re-conversion. A moldboard plow of about half the car's width (FIG. 3) is our preferred embodiment. The mini-moldboard (FIG. 10) is least expensive. Deepest snow can be handled by our tall, narrow moldboard (FIG. 15).
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: January 4, 2000
    Inventor: Gordon W. Nugent
  • Patent number: 5869182
    Abstract: A sewing thread comprising at least one precursor material of a product at its outer surface, which imparts a stitched connection produced with such a thread an increased adherence to the material to be sewn. Furthermore, the invention provides a sewing thread wherein the applied precursor material transforms to form a product which is capable of enlarging the outer diameter of the sewing thread, particularly in an aqueous environment. Furthermore, the invention provides a method for producing waterproof stitched connections.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: February 9, 1999
    Inventors: Gerd Ebert, Thomas Seitz, Werner Amler
  • Patent number: 5794427
    Abstract: A process of making a low-shrinkage, air-textured yarn, in particular sewing yarn, of synthetic, pre-oriented polymer multifilaments, includes the steps of drawing multifilaments in the form of a single strand at a temperature of about 180.degree. to 230.degree. C. by a factor of 1.6 to 2.5, air-texturing the drawn strand at a rate of overfeed of 1.03 to 1.20 to form a single-strand raw yarn, feeding the raw yarn to a fluffing zone of predetermined length at a rate of overfeed of 1.003 to 1.025, winding the fluffy raw yarn at slightest possible tension, reeling off and twisting the wound raw yarn, and treating the twisted raw yarn at a temperature of 125.degree. to 135.degree. C. over 1 to 3 hours in a dyeing unit, and, optionally, dyeing the raw yarn. The process is equally applicable for making plied yarns.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: August 18, 1998
    Assignee: Madeira Garnfabrik Rudolf Schmidt KG
    Inventors: Franco Cavedon, Hartmut Ritter, Martin Lohe
  • Patent number: 5735110
    Abstract: In core yarns, a) the polyester material of the core filaments has an average molecular weight corresponding to a relative solution viscosity of at least 1.9, and b) the core has a specific strength of at least 60 cN/tex, the core yarns producing a seam length to rupture of more than 800 cm in a sewing test under aggravated conditions.The core yarns are obtainable by a process comprising the measures of: i) producing multifilament yarns based on polyesters having an average molecular weight corresponding to a relative solution viscosity of at least 1.9 by melt spinning polyester with a takeoff speed of at least 1500 m/min.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: April 7, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Erhard Kruger, Aribert Reinsch, Sigmar Hartmann
  • Patent number: 5645935
    Abstract: Two-component loop yarns are composed of core and effect filaments, at least part of the core component consisting of aromatic polyamides, wherein the aromatic polyamides contain the structural repeat units of the formulae I and II--OC--Ar.sup.1 --CO--NH--Ar.sup.2 --NH-- (I)--OC--Ar.sup.1 --CO--NH--Ar.sup.3 --NH-- (II),where Ar.sup.1, Ar.sup.2 and Ar.sup.3 are each independently of the others a bivalent mono- or polycyclic aromatic radical whose free valences are disposed para or meta or comparably parallel, coaxial or angled to each other, and Ar.sup.2 and Ar.sup.3 each have different individual meanings within the scope of the given definitions, and the respective monomer components underlying the polymer are selected so as to produce an aromatic polyamide which forms preferably isotropic solutions in organic solvents.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: July 8, 1997
    Assignee: Hoechst Trevira GmbH & Co. KG
    Inventors: Wilbert Kemper, Richard Neuert
  • Patent number: 5518814
    Abstract: Described is a flat multifilament yarn with minimal opening tendency of the mutually bound-together filaments, expressed by the quantityVS(K.sub.F)>42%and with good compaction, expressed by the quantity(VG.sub.mean /VG.sub.max) * 100%>45%the VG quantities being degrees of intermingling determined using the Rothschild needle tester model 2040, VG.sub.mean being the arithmetic mean of 20 needle test measurements, and VG.sub.max being the maximum value of 20 needle test measurements. VS(K.sub.F) is the intermingling stability at a given total yarn tension K.sub.F determined by measuring the opening tendency of the flat multifilament yarn under dynamic-mechanical stress by a specific method.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: May 21, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Burkhard Bonigk
  • Patent number: 5436075
    Abstract: Composite flexible multilayer insulation systems (MLI) were evaluated for thermal performance and compared with currently used fibrous silica (baseline) insulation system. The systems described are multilayer insulations consisting of alternating layers of metal foil and scrim ceramic cloth or vacuum metallized polymeric films quilted together using ceramic thread. A silicon carbide thread for use in the quilting and the method of making it are also described. These systems are useful to provide lightweight thermal insulation for a variety of uses, particularly on the surface of aerospace vehicles subject to very high temperatures during flight.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: July 25, 1995
    Assignee: The United States of America as represented by the Administrator of National Aeronautics and Space Administration
    Inventor: Paul M. Sawko
  • Patent number: 5429869
    Abstract: The present invention provides improved compositions of expanded polytetrafluoroethylene (PTFE) and similar polymers and methods for forming and using such compositions. In its preferred embodiment, the present invention employs a mixture of PTFE and expandable thermoplastic microspheres. Through application of an energy source to the mixture, a coherent three dimensional expansion of PTFE can be achieved. The expanded mixture has many of the same beneficial properties of mechanically expanded PTFE and numerous properties previously unavailable with expanded PTFE products.
    Type: Grant
    Filed: February 26, 1993
    Date of Patent: July 4, 1995
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Gordon L. McGregor, Raymond B. Minor, William P. Mortimer, Jr., Daniel E. Hubis
  • Patent number: 5429868
    Abstract: A yarn, especially a sewing yarn, comprises at least two multifile yarn components. The first yarn component forms mainly the core of the yarn and the second yarn component forms mainly the jacket of the yarn. The two yarn components are intermingled with one another. The monofilaments of the second yarn component have a specific strength which amounts to between 5% and 70%, especially between 10% and 50%, of the specific strength of the monofilaments of the first yarn component.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: July 4, 1995
    Assignee: Amann & Sohne GmbH & Co.
    Inventors: Kurt Truckenmuller, Karl Greifeneder
  • Patent number: 5288552
    Abstract: This invention provides for a continuous PTFE fiber having on its surface a substantially round profile and a single spiralling seam formed from a continuous sheet of polytetrafluoroethylene which is helically rolled and self-adhered. The PTFE sheet may include microporous PTFE as well as expanded microporous PTFE. The PTFE sheet may be filled with particulate fillers or coated with polymeric coatings prior to the formation of the inventive fiber. The PTFE sheet may be used to contain various filamentary or sheet-like elements with the inventive fiber.The method for producing the inventive fiber is also disclosed.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: February 22, 1994
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Donald L. Hollenbaugh, Jr., Gordon L. McGregor, Raymond B. Minor
  • Patent number: 4850186
    Abstract: A thread comprising plural carbon fiber strands having a first twist of 80 turns/m or more and plied and twisted to give a final twist of 50 turns/m or more in the direction reverse to the first twist. The thread has a fineness of 3000 denier or less and a knot strength of 1.0 g/denier or more, and the single fibers of the carbon fiber strands constituting the thread each have a fineness of 0.7 denier or less and a loop breaking strain of 2.5% or more.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: July 25, 1989
    Assignee: Toray Industries, Inc.
    Inventors: Tohru Hiramatsu, Tomitake Higuchi, Akira Nishimura
  • Patent number: 4750324
    Abstract: The present invention makes possible fabrics stitchbonded with or knitted from brittle yarns by providing a composite yarn which is able to be used in commercial stitchbonding and knitting machines, the new composite yarn comprising a load-bearing core yarn, a brittle yarn and a wrap yarn which secures the core yarn and the brittle yarn together. The wrap yarn may be helically wrapped around the load-bearing core yarn and the brittle yarn, or the wrap yarn may secure the load-bearing core yarn and the brittle yarn together with a series of connected loops forming a knitted pillar of chain stitches.
    Type: Grant
    Filed: January 23, 1987
    Date of Patent: June 14, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Miroslav Tochacek, Lloyd R. White
  • Patent number: 4656825
    Abstract: A method for manufacturing a sewing thread comprising the following steps:drawing an undrawn polyester multifilament yarn;preliminarily heat treating the drawn yarn at an effective heat treating temperature before false twisting;then, false twisting the heat treated synthetic multifilament yarn at a temperature of at least 150.degree. C.subjecting the false twisted yarn to a fluid jet treatment under the slackened condition so as to intermittently interlace in a lengthwise direction constituent filaments of the yarn and so as to form protruded portions protruding from the surface of the yarn; andpost-heat treating the interlaced yarn at an effective heat treating temperature being higher than the heat treating temperature of the false twisting.By this method, a thread suitable for sewing can be obtained.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: April 14, 1987
    Assignee: Toray Industries, Inc.
    Inventors: Takao Negishi, Teiryo Kojima
  • Patent number: 4578940
    Abstract: A method for manufacturing a sewing thread comprising the following steps:drawing an undrawn polyester multifilament yarn;preliminarily heat treating the drawn yarn at an effective heat treating temperature before false twisting;then, false twisting the heat treated synthetic multifilament yarn at a temperature of at least 150.degree. C.;subjecting the false twisted yarn to a fluid jet treatment under the slackened condition so as to intermittently interlace in a lengthwise direction constituent filaments of the yarn and so as to form protruded portions protruding from the surface of the yarn; andpost-heat treating the interlaced yarn at an effective heat treating temperature being higher than the heat treating temperature of the false twisting.By this method, a thread suitable for sewing can be obtained.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: April 1, 1986
    Assignee: Toray Industries, Inc.
    Inventors: Takao Negishi, Teiryo Kojima
  • Patent number: 4523426
    Abstract: In accordance with the invention there is provided a synthetic sewing thread of multifilament construction characterized by its ability to lessen the buildup of heat at the needle of a high speed sewing machine during the operation thereof, even during the sewing of relatively heavy weight fabrics, so as to allow the thread to be utilized as a substitute for the sewing threads conventionally required in high temperature sewing applications, such as cotton spun yarns or cotton sheathed core yarns. The thread is of substantially uniform cross section throughout, devoid of alternating thick and thin areas to provide a smooth more uniform sewing thread. The thread comprises a plurality of texturized continuous synthetic filaments, the filaments having a nonlinear crimped configuration providing bulk to the thread and being entangled with one another along the length of the thread by being directed through a fluid jet under a relatively high pressure of at least 80 p.s.i. and being further bound together by twist.
    Type: Grant
    Filed: February 10, 1984
    Date of Patent: June 18, 1985
    Assignee: Collins & Aikman Corp.
    Inventors: Eddie W. Scott, Errol N. Seltzer
  • Patent number: 4513565
    Abstract: A method for manufacturing a sewing thread comprising the following steps:drawing an undrawn polyester multifilament yarn;preliminarily heat treating the drawn yarn at an effective heat treating temperature before false twisting;then, false twisting the heat treated synthetic multifilament yarn at a temperature of at least 150.degree. C.;subjecting the false twisted yarn to a fluid jet treatment under the slackened condition so as to intermittently interlace in a lengthwise direction constituent filaments of the yarn and so as to form protruded portions protruding from the surface of the yarn; andpost-heat treating the interlaced yarn at an effective heat treating temperature being higher than the heat treating temperature of the false twisting.By this method, a thread suitable for sewing can be obtained.
    Type: Grant
    Filed: February 1, 1983
    Date of Patent: April 30, 1985
    Assignee: Toray Industries, Inc.
    Inventors: Takao Negishi, Teiryo Kojima
  • Patent number: 4430853
    Abstract: In accordance with the invention there is provided a synthetic sewing thread of multifilament construction characterized by its ability to lessen the buildup of heat at the needle of a high speed sewing machine during the operation thereof, even during the sewing of relatively heavy weight fabrics, so as to allow the thread to be utilized as a substitute for the sewing threads conventionally required in high temperature sewing applications, such as cotton spun yarns or cotton sheathed core yarns. The thread comprises a plurality of texturized continuous synthetic filaments, the filaments having a nonlinear crimped configuration providing bulk to the thread and being entangled with one another along the length of the thread and being further bound together by twist. The thread has a heat protective lubricant coating applied thereto and penetrating the filament bundle.
    Type: Grant
    Filed: November 20, 1981
    Date of Patent: February 14, 1984
    Assignee: Collins & Aikman Corporation
    Inventors: Eddie W. Scott, Errol N. Seltzer
  • Patent number: 4387555
    Abstract: Thread consisting of three polymer strands twisted in one direction, each strand being wrapped with a metallic strip wound in the other direction, the strands and strip being covered with an elastomer sheath.
    Type: Grant
    Filed: September 28, 1981
    Date of Patent: June 14, 1983
    Assignee: Robinson Thread Company
    Inventor: Stuart A. Robinson
  • Patent number: 4375779
    Abstract: A composite fiber sewing thread comprising a central core having one or more strands of an inorganic or organic fiber or blends thereof, and an outer jacket enclosing the core and having the form of a tubular body of braided strands of continuous ceramic fibers is disclosed. The thread is useful in very high temperature applications.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: March 8, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Edward M. Fischer