US3296990A - Method for reinforcing sewn material - Google Patents

Method for reinforcing sewn material Download PDF

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Publication number
US3296990A
US3296990A US393770A US39377064A US3296990A US 3296990 A US3296990 A US 3296990A US 393770 A US393770 A US 393770A US 39377064 A US39377064 A US 39377064A US 3296990 A US3296990 A US 3296990A
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United States
Prior art keywords
thread
tool
area
reinforcing
penetration
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US393770A
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Luther G Simjian
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Individual
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B17/00—Sewing machines for concurrently making thread and welded seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/62—Stitching
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2209/00—Use of special materials
    • D05D2209/12—Metals or metal coatings
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/20—Metallic fibres

Definitions

  • This invention relates to sewing and particularly to a method for reinforcing stitched material, for instance machinesewn textiles. More specifically, the instant method concerns the reinforcement of material which has been weakened by consecutively spaced stitches and thread penetration.
  • Modern garments are made mostly of material Woven from synthetic fibers, such as Dacron, nylon, Creslan, to name a few.
  • synthetic fibers such as Dacron, nylon, Creslan
  • the problem of wealtening the material at the areas of the stitched seams continues to gain greater significance.
  • the needle and thread penetration causes a perforated seam which, in the absence of strong surround ing fibers, is responsible for ready tearing of the garment, principally in the seam.
  • One of the principal objects of this invention is, therefore, the provision of a method for reinforcing thread stitched seams in synthetic materials without substantially affecting the visible appearance of the seam.
  • Another object of this invention is the provision of a method for reinforcing thread stitches in materials by employing means to soften the material and causing it to flow around the thread at the area of thread penetration.
  • a further object of this invention is the provision of a method for reinforcing stitched material, using ultrasonic energy which is applied at the points of thread penetration for causing the reinforcement of the stitch.
  • synthetic textile material is seam stitched with thread in the conventional manner.
  • a tool in the form of a rod or tube is brought into contact with the area at which the thread penetrates the material and ultrasonic energy is applied to the tool.
  • the energy supplied to the tool and dissipated by the material causes the material to soften and to flow, substantially surrounding and adhering to the thread, thus providing reinforcement at this point.
  • the power level of the ultrasonic energy must be high enough to cause the very localized flow of the material, but must also be low enough so as not to disturb the appearance of the surrounding area as it is a major object of this invention that the pleasing appearance of a stitched seam be preserved.
  • an oscillating tool is mounted immediately to the rear of the conventional sewing needle on the sewing machine head.
  • the tool is driven to reciprocate in a vertical direction for briefly engaging the material at the area of thread penetration.
  • the tool is coupled to a source of ultrasonic energy, a frequency generally in excess of 16,000 cycles per second. It will be apparent that, if desired, the tool can be controlled to engage only every second, third, or fourth point of thread penetration.
  • a tubular tool may be used which is shaped and guided so that the actual point of thread penetration falls into the center of the tube.
  • a radial relief slot may be provided for the thread running to the adjacent stitch.
  • a rotating star wheel may be used for the tool in order to provide a similar result.
  • the star wheel must be changed also.
  • a further alternative comprises the use of a metallic thread instead of a textile fiber thread.
  • the ultrasonic energy can then be coupled directly to the thread.
  • a method for reinforcing sewn material in which a thread penetrates the material comprising the steps of: applying a tool at the area of thread penetration, and subjecting said area by means of said tool to ultrasonic energy of a power level sufiicient to cause the dissipated energy to soften the material and flow around the thread. thread.
  • a method for reinforcing sewn synthetic material in which a thread penetrates the material comprising the steps of: applying a tool at the area of thread penetration, and subjecting said area by means of said tool to ultrasonic ener y of a power lever suflicient to soften the material and flow around the thread without substantially atfectin g the appearance or" the stitch.
  • a method for reinforcing a stitched scam in synthetic fiber material involving consecutive points of thread penetration comprising the steps of: applying a tool to at least some of the points of thread penetration, applying ultrasonic energy to said tool and thereby to said points, the power level of said energy being sufiiciently high to cause a slight softening of the material in the immediate proximity to the area of thread penetration, and whereby the material is caused to flow and reinforce the respective area, and being sufficiently low to leave the appearance of the seam substantially undisturbed.
  • a method for reinforcing sewn synthetic material in which a thread penetrates the material comprising the steps of: sewing the material with a metallic thread, and applying ultrasonic energy to the thread, said energy being of a power level to cause softening of the material in the immediate proximity to the thread and its flowing around the thread provides increased strength of the sewn area.

Description

32%,390 Patented Jan. 10, 1967 3,296,990 METHQD FUR REHNFQRCHNG SEWN MATERIAL Luther G. Elirnglian, Laurel Laue, Greenwich, Conn. lldtifitl No Brewing. Filed Sept. ll, llidd, her. No. 393,7'7ll l Claims. (Cl. ll2.--2ti2) This invention relates to sewing and particularly to a method for reinforcing stitched material, for instance machinesewn textiles. More specifically, the instant method concerns the reinforcement of material which has been weakened by consecutively spaced stitches and thread penetration.
Modern garments, for instance, are made mostly of material Woven from synthetic fibers, such as Dacron, nylon, Creslan, to name a few. As the trend to thinner and light weight textiles continues, the problem of wealtening the material at the areas of the stitched seams continues to gain greater significance. Particularly in machine-sewing, the needle and thread penetration causes a perforated seam which, in the absence of strong surround ing fibers, is responsible for ready tearing of the garment, principally in the seam.
In order to minimize this occurrence, a process has been devised to provide for the reinforcement of the material at the area heretofore constituting the weakest point, namely the area of thread penetration.
One of the principal objects of this invention is, therefore, the provision of a method for reinforcing thread stitched seams in synthetic materials without substantially affecting the visible appearance of the seam.
Another object of this invention is the provision of a method for reinforcing thread stitches in materials by employing means to soften the material and causing it to flow around the thread at the area of thread penetration.
A further object of this invention is the provision of a method for reinforcing stitched material, using ultrasonic energy which is applied at the points of thread penetration for causing the reinforcement of the stitch.
Further and still other objects of this invention will be readily apparent by reference to the following description of the novel process.
In accordance with the instant process, synthetic textile material is seam stitched with thread in the conventional manner. Subsequently a tool in the form of a rod or tube, is brought into contact with the area at which the thread penetrates the material and ultrasonic energy is applied to the tool. The energy supplied to the tool and dissipated by the material causes the material to soften and to flow, substantially surrounding and adhering to the thread, thus providing reinforcement at this point. It will be apparent that in order to preserve the appearance of the seam, the power level of the ultrasonic energy must be high enough to cause the very localized flow of the material, but must also be low enough so as not to disturb the appearance of the surrounding area as it is a major object of this invention that the pleasing appearance of a stitched seam be preserved.
In the mechanical embodiment of this invention, for machine sewing an oscillating tool is mounted immediately to the rear of the conventional sewing needle on the sewing machine head. The tool is driven to reciprocate in a vertical direction for briefly engaging the material at the area of thread penetration. The tool is coupled to a source of ultrasonic energy, a frequency generally in excess of 16,000 cycles per second. It will be apparent that, if desired, the tool can be controlled to engage only every second, third, or fourth point of thread penetration. Instead of a rod type tool, the preferred embodiment, a tubular tool may be used which is shaped and guided so that the actual point of thread penetration falls into the center of the tube. A radial relief slot may be provided for the thread running to the adjacent stitch.
Alternatively, a rotating star wheel may be used for the tool in order to provide a similar result. However, it will be apperent that whenever the stitch spacing is changed, the star wheel must be changed also.
A further alternative comprises the use of a metallic thread instead of a textile fiber thread. The ultrasonic energy can then be coupled directly to the thread.
It will be apparent that the above described process over comes the weakening of thin synthetic material caused by seam stitching while preserving the appearance of the seam. Furthermore, it will be quite obvious that the process may be applied also to such material as vinyl sheeting which, in the conventional manner, is welded by the use of a rotating wheel. This latter method does not provide the more finished and pleasing appearance which is associated with a stitched seam.
While there has been described a typical and preferred embodiment of the present invention and several alternative constructions, it will readily be apparent to those skilled in the art that various further changes and modifications may be made without deviating from the instant and broad principles of this invention which shall be limited only by the scope of the appended claims.
What is claimed is:
1. A method for reinforcing sewn material in which a thread penetrates the material comprising the steps of: applying a tool at the area of thread penetration, and subjecting said area by means of said tool to ultrasonic energy of a power level sufiicient to cause the dissipated energy to soften the material and flow around the thread. thread.
2. A method for reinforcing sewn synthetic material in which a thread penetrates the material comprising the steps of: applying a tool at the area of thread penetration, and subjecting said area by means of said tool to ultrasonic ener y of a power lever suflicient to soften the material and flow around the thread without substantially atfectin g the appearance or" the stitch.
3. A method for reinforcing a stitched scam in synthetic fiber material involving consecutive points of thread penetration comprising the steps of: applying a tool to at least some of the points of thread penetration, applying ultrasonic energy to said tool and thereby to said points, the power level of said energy being sufiiciently high to cause a slight softening of the material in the immediate proximity to the area of thread penetration, and whereby the material is caused to flow and reinforce the respective area, and being sufficiently low to leave the appearance of the seam substantially undisturbed.
4. A method for reinforcing sewn synthetic material in which a thread penetrates the material comprising the steps of: sewing the material with a metallic thread, and applying ultrasonic energy to the thread, said energy being of a power level to cause softening of the material in the immediate proximity to the thread and its flowing around the thread provides increased strength of the sewn area.
References Cited by the Examiner UNITED STATES PATENTS 3,184,353 5/1965 Balamuth et al. 156-73 PATRICK D. LAWSON, Primary Examiner.
RICHARD J. SCANLAN, 111., Assistant Examiner.

Claims (1)

1. A METHOD FOR REINFORCING SEWN MATERIAL IN WHICH A THREAD PENETRATES THE MATERIAL COMPRISING THE STEPS OF: APPLYING A TOOL AT THE AREA OF THREAD PENETRATION, AND SUBJECTING SAID AREA BY MEANS OF SAID TOOL TO ULTRASONIC ENERGY OF A POWER LEVEL SUFFICIENT TO CAUSE THE DISSIPATED ENERGY TO SOFTEN THE MATERIAL AND FLOW AROUND THE THREAD. THREAD.
US393770A 1964-09-01 1964-09-01 Method for reinforcing sewn material Expired - Lifetime US3296990A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514511A (en) * 1966-12-30 1970-05-26 Waldes Kohinoor Inc Slide fastener manufacture method
US3513848A (en) * 1967-12-11 1970-05-26 Ultrasonic Systems Ultrasonic suturing
US3541671A (en) * 1967-06-09 1970-11-24 Int Standard Electric Corp Process of fixing paper to metal
US4247345A (en) * 1978-11-30 1981-01-27 Olin Corporation Method for joining synthetic materials
EP0107910A1 (en) * 1982-09-24 1984-05-09 Grumman Aerospace Corporation Stitching module
EP0112949A1 (en) * 1982-12-30 1984-07-11 Inoue-Japax Research Incorporated Sewing method and machine
US4478661A (en) * 1981-03-20 1984-10-23 Dayco Corporation Method of making a reinforced collapsible hose construction
US4541349A (en) * 1981-12-24 1985-09-17 Inoue-Japax Research Incorporated Sewing method and machine
US6106646A (en) * 1992-09-14 2000-08-22 General Electric Company Method for joining composite materials
US20030221765A1 (en) * 2002-05-29 2003-12-04 Christian Guilhem Method and machine for producing a seam which is not susceptible to coming undone
US11390040B2 (en) * 2016-02-19 2022-07-19 Frimo Group Gmbh Method for sealing a seam region, and plastic skin

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184353A (en) * 1961-11-13 1965-05-18 Cavitron Ultrasonics Inc Fastening together of members by high frequency vibrations

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184353A (en) * 1961-11-13 1965-05-18 Cavitron Ultrasonics Inc Fastening together of members by high frequency vibrations

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514511A (en) * 1966-12-30 1970-05-26 Waldes Kohinoor Inc Slide fastener manufacture method
US3541671A (en) * 1967-06-09 1970-11-24 Int Standard Electric Corp Process of fixing paper to metal
US3513848A (en) * 1967-12-11 1970-05-26 Ultrasonic Systems Ultrasonic suturing
US4247345A (en) * 1978-11-30 1981-01-27 Olin Corporation Method for joining synthetic materials
US4478661A (en) * 1981-03-20 1984-10-23 Dayco Corporation Method of making a reinforced collapsible hose construction
US4541349A (en) * 1981-12-24 1985-09-17 Inoue-Japax Research Incorporated Sewing method and machine
EP0107910A1 (en) * 1982-09-24 1984-05-09 Grumman Aerospace Corporation Stitching module
US4503788A (en) * 1982-09-24 1985-03-12 Grumman Aerospace Corporation Translaminar stitching apparatus for composite airframe part assembly
EP0112949A1 (en) * 1982-12-30 1984-07-11 Inoue-Japax Research Incorporated Sewing method and machine
US6106646A (en) * 1992-09-14 2000-08-22 General Electric Company Method for joining composite materials
US20030221765A1 (en) * 2002-05-29 2003-12-04 Christian Guilhem Method and machine for producing a seam which is not susceptible to coming undone
US20070131337A1 (en) * 2002-05-29 2007-06-14 Christian Guilhem Method and machine for producing a seam which is not susceptible to coming undone
US7291236B2 (en) 2002-05-29 2007-11-06 Christian Guilhem Method and machine for producing a seam which is not susceptible to coming undone
US7857927B2 (en) 2002-05-29 2010-12-28 Christian Guilhem Method and machine for producing a seam which is not susceptible to coming undone
US11390040B2 (en) * 2016-02-19 2022-07-19 Frimo Group Gmbh Method for sealing a seam region, and plastic skin

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