US3228366A - Process for sewing fabrics - Google Patents

Process for sewing fabrics Download PDF

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Publication number
US3228366A
US3228366A US243555A US24355562A US3228366A US 3228366 A US3228366 A US 3228366A US 243555 A US243555 A US 243555A US 24355562 A US24355562 A US 24355562A US 3228366 A US3228366 A US 3228366A
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Prior art keywords
fabric
sewing
needle
fabrics
electrodes
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US243555A
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Jean C Chezaud
Burillon Pierre
Mangieri Dominique
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Rhodiaceta SA
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Rhodiaceta SA
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/42—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for desensitising skin, for protruding skin to facilitate piercing, or for locating point where body is to be pierced
    • A61M5/425—Protruding skin to facilitate piercing, e.g. vacuum cylinders, vein immobilising means
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B81/00—Sewing machines incorporating devices serving purposes other than sewing, e.g. for blowing air, for grinding

Definitions

  • a device comprising a heated piercing needle which operates simultaneously with the sewing needle, so that the sewing needle enters the holes previously pierced by the heated needle disposed in front of it, the spacing between the piercing needle and the sewing needle being at least equal to the distance which separates two adjacent stitches.
  • the heated needle in piercing the fabric, carries with it small quantities of the material constituting the threads, this material being carbonised.
  • the present invention is a process for sewing fabrics consisting of or containing thermoplastic threads, which comprises passing an electric spark through the fabric at the points through which a sewing needle is subsequently to pass.
  • the fabric is caused to advance through a sewing machine by a length smaller than one sewing stitch between the moment when the spark discharge passes through the fabric and that when the needle stitches the fabric in the hole thus obtained, the spark discharge and the movement of the needle being synchronised.
  • a further aspect of the invention is a sewing machine for carrying out above process wherein an electrode is positioned on either side of the plane of the fabric, the electrodes being adapted to pass an electric spark through the said fabric at the points through which the sewing needle is subsequently to pass.
  • one of the electrodes is mounted in the pressure foot and the other in the needle plate.
  • the discharge of sparks and the formation of the stitch may be synchronized by an electrical switching device controlled by the driving shaft of the sewing machine e.g. a centrifugal type of switch. There may also be present a means for preventing the supply of high voltage to the electrodes when the machine stitches the fabric.
  • FIGURE 1 is a cross-section of a stitching device
  • FIGURE 2 is a diagram to show the relationship between the spark and the sewing needle
  • FIGURE 3 is a plan view of the stitching device.
  • a pressure foot 1 and needle plate 2 contain two electrodes 3 and 4 insulated by a dielectric material 5.
  • the straight line AB joining the tips of these two electrodes 3 and 4 intersects the sewing line on the fabric at point C at a small distance from the needle axis represented by line FG.
  • the fabric is sewn by needle 7 and moved by driving claws S.
  • line AB and the point C have the same significance as in FIGURE 1;
  • line DE represents the seam line of the fabric and H is the projection of the needle axis FG of FIGURE 1.
  • sparks pass through the fabric and form a hole or line of weakness through the said fabric by melting or softening of the thermoplastic fibre in the zone traversed.
  • the fabric is stopped by withdrawal of the claw and the needle 7 moves downwards passing through the hole thus formed.
  • the diameter of the hole may most conveniently be regulated by varying the potential difference between the two electrodes.
  • the invention is further illustrated by the following example.
  • a needle having a diameter of 0.8 mm. is used, with a polyester sewing thread with a metric number of 70.
  • a current of 25 milliamperes at 10,000 volts is fed to the supply circuit of the electrodes to cause the spark discharge.
  • the stitching is carried out at a speed 2,500 stitches per minute.
  • thermoplastic fibres which comprises the steps of (a) forming a series of equally spaced holes in said fabric along the line to be stitched by the passage of an electric spark through said fabric, and (b) sewing said fabric through said holes, continuously with their formation.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Textile Engineering (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dermatology (AREA)
  • Sewing Machines And Sewing (AREA)

Description

Jan. 11, 1966 J. c. cHEzAuD ETAL. 3,228,366
PROCESS FOR SEWING FABRICS Filed Dem 10, 1962 W///\7\ u H 4 YAttorneys 3,228,366 PROCESS FOR SEWING FABRICS Jean C. Chezaud, Saint-Rambert-llle Barbe, Pierre Burillon, Lyon, and Dominique Mangieri, Cailloux-sur- Fontaine, France, assignors to Societe Rhodiaceta, Paris, France, a French body corporate Filed Dec. 10, 1962, Ser. No. 243,555 Claims priority, application France, Dec. 12, 1961, 881,694 1 Claim. (Cl. 112-262) This invention relates to the sewing of fabrics comprising thermo plastic threads.
When fabrics based on thermoplastic threads are sewn together puckering generally occurs at the seams. This puckering is due mainly to the tension set up in the fabric structure by the presence of the sewing thread, and various process have been proposed for reducing these tensions.
It has been proposed to use sewing machine needles which have a sharp edge facing upstream during the sewing, relative to the direction of advance of the fabric.
The ease with which the various fabric layers slide one upon the other causes irregularities in the stitches in addition to the puckering. In order to obviate this disadvantage, special machines have been designed which are provided with driving means which operate simultaneously on the top and bottom of the fabrics, or are even provided with means which drive the fabric by the needle.
A further difficulty arises in the use of high-speed sewing machines with a thermoplastic thread, where the heating of the needle, due to friction with the fabric, sometimes causes melting and breaking of the thread. In order to avoid these breakages, it is for example possible to x on the sewing machine a device comprising a heated piercing needle which operates simultaneously with the sewing needle, so that the sewing needle enters the holes previously pierced by the heated needle disposed in front of it, the spacing between the piercing needle and the sewing needle being at least equal to the distance which separates two adjacent stitches.
However, if such a device is used, the heated needle, in piercing the fabric, carries with it small quantities of the material constituting the threads, this material being carbonised.
The present invention is a process for sewing fabrics consisting of or containing thermoplastic threads, which comprises passing an electric spark through the fabric at the points through which a sewing needle is subsequently to pass. In a preferred embodiment of the invention the fabric is caused to advance through a sewing machine by a length smaller than one sewing stitch between the moment when the spark discharge passes through the fabric and that when the needle stitches the fabric in the hole thus obtained, the spark discharge and the movement of the needle being synchronised.
A further aspect of the invention is a sewing machine for carrying out above process wherein an electrode is positioned on either side of the plane of the fabric, the electrodes being adapted to pass an electric spark through the said fabric at the points through which the sewing needle is subsequently to pass.
Preferably one of the electrodes is mounted in the pressure foot and the other in the needle plate.
The discharge of sparks and the formation of the stitch may be synchronized by an electrical switching device controlled by the driving shaft of the sewing machine e.g. a centrifugal type of switch. There may also be present a means for preventing the supply of high voltage to the electrodes when the machine stitches the fabric.
A preferred embodiment of the invention is illustrated in the accompanying drawings, in which:
FIGURE 1 is a cross-section of a stitching device,
United States Patent O rice showing the pressure foot and the needle plate of the sewing machine,
FIGURE 2 is a diagram to show the relationship between the spark and the sewing needle, and
FIGURE 3 is a plan view of the stitching device.
Referring now to FIGURE l, a pressure foot 1 and needle plate 2 contain two electrodes 3 and 4 insulated by a dielectric material 5. The straight line AB joining the tips of these two electrodes 3 and 4 intersects the sewing line on the fabric at point C at a small distance from the needle axis represented by line FG. The fabric is sewn by needle 7 and moved by driving claws S.
In FIGURE 2 the line AB and the point C have the same significance as in FIGURE 1; line DE represents the seam line of the fabric and H is the projection of the needle axis FG of FIGURE 1.
When the needle 7 is raised and the driving claws 8 of the machine cause the fabric to move forward, a potential ditference suicently high to cause a spark discharge is set up between the two electrodes.
These sparks pass through the fabric and form a hole or line of weakness through the said fabric by melting or softening of the thermoplastic fibre in the zone traversed. The fabric is stopped by withdrawal of the claw and the needle 7 moves downwards passing through the hole thus formed.
The diameter of the hole may most conveniently be regulated by varying the potential difference between the two electrodes. The invention is further illustrated by the following example.
EXAMPLE Two pieces of fabric with a taffeta weave comprising threads consisting of polyamide 66 poly (hexamethylene adipamide) are fitted together by stitching and with a stitch length of 2 mm. on a sewing machine substantially as described. The distance between the axis of the needle and the plane parallel to this axis and passing through the straight line AB is 0.6 mm.
A needle having a diameter of 0.8 mm. is used, with a polyester sewing thread with a metric number of 70.
A current of 25 milliamperes at 10,000 volts is fed to the supply circuit of the electrodes to cause the spark discharge.
The stitching is carried out at a speed 2,500 stitches per minute.
A seam without puckering is obtained, without breakage of the thread.
We claim:
The method for sewing fabrics comprising thermoplastic fibres which comprises the steps of (a) forming a series of equally spaced holes in said fabric along the line to be stitched by the passage of an electric spark through said fabric, and (b) sewing said fabric through said holes, continuously with their formation.
References Cited by the Examiner UNITED STATES PATENTS 1,724,463 8/1929 Duner 112-80 2,011,645 8/1935 Miller 219-19 2,217,967 10/1940 Phillips 112--2 2,513,838 7/1950 Beall 219--19 2,545,208 3/1951 Meaker 219--19 2,592,463 4/1952 Phillips 112-122 X FOREIGN PATENTS 774,915 5/ 1957 Great Britain.
JORDAN FRANKLIN, Primary Examiner.
RICHARD M. WOOD, Examiner.
US243555A 1961-12-12 1962-12-10 Process for sewing fabrics Expired - Lifetime US3228366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR881694A FR1315844A (en) 1961-12-12 1961-12-12 Method and apparatus for sewing fabrics based on thermoplastic threads

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US3228366A true US3228366A (en) 1966-01-11

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US243555A Expired - Lifetime US3228366A (en) 1961-12-12 1962-12-10 Process for sewing fabrics
US475050A Expired - Lifetime US3241508A (en) 1961-12-12 1965-07-27 Apparatus for sewing fabrics

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US475050A Expired - Lifetime US3241508A (en) 1961-12-12 1965-07-27 Apparatus for sewing fabrics

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US (2) US3228366A (en)
CH (1) CH390662A (en)
FR (1) FR1315844A (en)
GB (1) GB968781A (en)
OA (1) OA01609A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985997A (en) * 1973-02-14 1976-10-12 John Charles Burley Method and apparatus for cutting cloth

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1735034A1 (en) * 1965-04-13 1970-04-09 Prym Werke William Zipper
DE2544165C3 (en) * 1975-10-03 1978-08-10 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Equipment on sewing machines for prepunching the sewing material
US20050025948A1 (en) * 2001-04-06 2005-02-03 Johnson David W. Composite laminate reinforced with curvilinear 3-D fiber and method of making the same
US7785693B2 (en) 2001-04-06 2010-08-31 Ebert Composites Corporation Composite laminate structure
US7731046B2 (en) * 2001-04-06 2010-06-08 Ebert Composites Corporation Composite sandwich panel and method of making same
US6645333B2 (en) 2001-04-06 2003-11-11 Ebert Composites Corporation Method of inserting z-axis reinforcing fibers into a composite laminate
US6676785B2 (en) 2001-04-06 2004-01-13 Ebert Composites Corporation Method of clinching the top and bottom ends of Z-axis fibers into the respective top and bottom surfaces of a composite laminate
US7105071B2 (en) * 2001-04-06 2006-09-12 Ebert Composites Corporation Method of inserting z-axis reinforcing fibers into a composite laminate
US7056576B2 (en) * 2001-04-06 2006-06-06 Ebert Composites, Inc. 3D fiber elements with high moment of inertia characteristics in composite sandwich laminates
US20050118448A1 (en) * 2002-12-05 2005-06-02 Olin Corporation, A Corporation Of The Commonwealth Of Virginia Laser ablation resistant copper foil

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1724463A (en) * 1929-08-13 Device fob making bugs
US2011645A (en) * 1934-02-07 1935-08-20 Walter T Miller Machine for perforating sheet material
US2217967A (en) * 1937-02-03 1940-10-15 American Hair & Felt Company Stitching mechanism
US2513838A (en) * 1946-07-11 1950-07-04 Herbert W Beall Method of making porous fabric
US2545208A (en) * 1946-04-19 1951-03-13 John W Meaker Electrical perforating apparatus
US2592463A (en) * 1946-10-10 1952-04-08 Warner Brothers Co Machine for cutting, processing, and/or seaming fabric or like sections and product thereof
GB774915A (en) * 1953-10-05 1957-05-15 Madeleine Jeandupeux Method of and apparatus for manufacturing long-pile rugs

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1724463A (en) * 1929-08-13 Device fob making bugs
US2011645A (en) * 1934-02-07 1935-08-20 Walter T Miller Machine for perforating sheet material
US2217967A (en) * 1937-02-03 1940-10-15 American Hair & Felt Company Stitching mechanism
US2545208A (en) * 1946-04-19 1951-03-13 John W Meaker Electrical perforating apparatus
US2513838A (en) * 1946-07-11 1950-07-04 Herbert W Beall Method of making porous fabric
US2592463A (en) * 1946-10-10 1952-04-08 Warner Brothers Co Machine for cutting, processing, and/or seaming fabric or like sections and product thereof
GB774915A (en) * 1953-10-05 1957-05-15 Madeleine Jeandupeux Method of and apparatus for manufacturing long-pile rugs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985997A (en) * 1973-02-14 1976-10-12 John Charles Burley Method and apparatus for cutting cloth

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Publication number Publication date
FR1315844A (en) 1963-01-25
GB968781A (en) 1964-09-02
CH390662A (en) 1965-04-15
US3241508A (en) 1966-03-22
OA01609A (en) 1969-09-20

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