US2857866A - Stitch-foot for use in double-needle sewing machines for the manufacture of helical-wire slide fasteners - Google Patents

Stitch-foot for use in double-needle sewing machines for the manufacture of helical-wire slide fasteners Download PDF

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Publication number
US2857866A
US2857866A US641165A US64116557A US2857866A US 2857866 A US2857866 A US 2857866A US 641165 A US641165 A US 641165A US 64116557 A US64116557 A US 64116557A US 2857866 A US2857866 A US 2857866A
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US
United States
Prior art keywords
plate
stitch
foot
guide
tapes
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Expired - Lifetime
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US641165A
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English (en)
Inventor
Porepp Hans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OPTI WERK GmbH
OPTI-WERK GmbH
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OPTI WERK GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by OPTI WERK GmbH filed Critical OPTI WERK GmbH
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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A44B19/40—Connection of separate, or one-piece, interlocking members to stringer tapes; Reinforcing such connections, e.g. by stitching
    • A44B19/406—Connection of one-piece interlocking members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/46—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples
    • B21D53/50—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples metal slide-fastener parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/25—Zipper or required component thereof
    • Y10T24/2518—Zipper or required component thereof having coiled or bent continuous wire interlocking surface
    • Y10T24/2527—Attached by stitching

Definitions

  • This invention relates to the manufacture of helicalwire slide fasteners consisting of two helical wires of metal or plastic material and of opposite twist which through suitable profiling or the like engage or disengage each other.
  • the helical wires are provided on the sides thereof located opposite the sides on which they engage each other with a longitudinally extending thread resting against the turns and are secured to the wires by a fastening thread between every turn of the Wires.
  • These longitudinally extending threads and fastening threads are then, together with a guide cord covering up the threads sewed to the attachment tapes.
  • the two helical wires provided with the fastening threads are brought into engagement with each other, whereupon the longitudinally extending threads and their fastening threads as well as the guide cords are sewn to the two attachment tapes by means of double-needle sewing machines.
  • customary sewing machines of this type can be used for this purpose only with greatest difiiculty and unsatisfactory results, as it is necessary to arrange the two attachment tapes, the two interlocked helical wires provided with the longitudinally extending threads and the fastening threads therefor, as well as the two guide cordsthat is to say, five semi-finished products of rather different propertiesaccurately on top of each other (on each side of the space 1, Figure 1), directly under the needles, in order to achieve a perfect sewing result.
  • the invention proposes to employ for the manufacture of helical-wire slide fasteners of the aforesaid kind a novel type attachment, herein called a stitch-foot, for a double-needle sewing machine.
  • the invention is principally characterized by the feature: that the stitch-foot consists of a lower plate and an upper plate and is provided on the feed-in side between the two plates with a guide member along which the two attachment tapes slide in flatly crossed position with the two inner edges confronting each other, whereupon the two attachment tapes are adjusted to straight-lined and parallel position in a guide chamber located between the two plates and corresponding in thickness and width to the dimensions of the completed slide fastener; that the lower plate is provided behind the place where the two attachment tapes cross each other with two bores for the passage of the needles; that the upper plate is provided with a slot extending from the forward edge of the plate to the passage for the needles and corresponding in 7 width to the width of the two interlocked and longitudinally moving helicalwires; that in the area ofthe More said slot before the needles two longitudinally extending guides are located for the guiding of the two guide cords covering up the longitudinally extending threads and fastening threads of the helical wires; and thatfro-m the
  • Fig. 1 is a top planview of the attachment tapes; of the interlocked helical wires provided'with longitudinally extending threads and fastening threads; andof the guide cords guided in the stitch-foot;
  • Fig. 2 is a side elevation of Fig. 1;
  • Fig. 3 is a cross-section on line Ill-IIl"of"Figs. 1 and'2;
  • Fig. 4 is a side elevation of the stitch-foot of themvention'
  • Fig. 5 is (left hand side) a front viewof'the feed'side of the stitch-foot; and (right hand side) a cross-section directly before the two needles;
  • Fig. 6 is a top plan view of'the stitch-foot. At the lower half of the figure the upper plate of the stitch-foot has been removed.
  • Fig. 7 is a top plan view of the lower plate of the stitch-foot
  • Fig. 8 is a side view of the lower plate of Fig; 7;
  • Fig. 9a is a top plan view of the cross-guide for thetwo attachment tapes
  • Fig. 9b' is a front view of the cross-guide for the two: attachment tapes;
  • Fig. 10 is a top plan view of the upper plate offthe stitch-foot;
  • Fig. 10a is a central longitudinal section through the: upper plate of Fig. 10;
  • Fig. 10a isa frontview of the upper plate
  • Fig. 11a is atop plan view of accordingguide
  • Fig. 11b is a side view of a cord guide.
  • the helical-wire slide fasteners consist of two helical Wires of opposite twist A A which through suitable profiling or by some other means tightly interlock; of two attachment tapes B B and of two guide cords C and C
  • the guide cords serve the purpose of guiding the two helical wires, of metal or plastic material, in a slider for producing the interlocking engagement or for severing it.
  • the two helical wires A A are provided along their outsides with longitudinally extending threads A A which are secured to the helical wires by means of fastening threads.
  • the helical wires are placed upon the tapes B B along the inner edges of the latter; thereupon the longitudinally extending threads A A are covered up by the guide cords C C and then the cords and the longitudinal threads and fastening threads of the latter are sewed to the two tapes.
  • a doubleneedle sewing machine is employed; and for obtaining a correct covering up the invention uses a stitch-foot hereinafter described to which the two attachment tapes B and B are fed as shown in Fig. 1, that is to say, flatly crossing each other.
  • a guide member for example an elongated rib F, whose width corresponds to the distance 1 between the two inner edges of the two tapes of the completed slide fastener.
  • the height of the rib F corresponds to the thickness of the two tapes B B
  • the interlocked helical wires A A are fed to the two tapes B B longitudinally towards the needles, over the tapes.
  • the two guide cords C C are fed, likewise longitudinally towards the needles, over the tapes, the two guide cords C C in such fashion that they cover up the longitudinal threads A A and fastening threads a. Thereafter these parts are sewed together.
  • the invention employs the stitch-foot as hereinafter described.
  • This stitch-foot consists essentially of a lower plate 1 and an upper plate 2, which are provided with a stitchfoot handle 3.
  • the lower plate is of rectangular shape and laterally terminates in two longitudinally extending upwardly projecting ribs 5 and 6. These two ribs 5 and 6 have, compared with the rear surface portion 1a of the plate, a height corresponding to the thickness of the tapes B B and their distance from each other corresponds to the entire width of the completed slide fastener.
  • the forward portion 1b of the plate surface is, compared with the height of the ribs 5 and 6, of larger depth than the rear surface portion 1a, whereby this depth corresponds to at least double the thickness of the tapes B B
  • the guide member for the crosswise feeding of the two attachment tapes B B According to Figs. 9a and 91), this guide member consists of a thin plates whose entire thickness corresponds to the depth of the forward surface portion 1b of the lower plate 1 as compared with the ribs 5 and 6 of this plate.
  • this plate 8 is smaller than the distance of the ribs 5 and 6 from each other, so that this plate after its arrangement in the recess 1b of the lower plate 1 can be shifted in a transverse direction.
  • the plate is provided with laterally projecting portions 8a and 81) extending through recesses 9 of the lower plate 1, so that in this way a guide is provided for the plate 8 as shown in Fig. 7 in broken lines.
  • the projecting portion 8a of the plate is provided at its free end with a downwardly bent flanged end portion 80,
  • this downwardly bent end portion 80 is provided with a threaded bore for the engagement therein of a setscrew 8d.
  • the projecting portions guide cords C C 8a and 8b are provided with transversely extending elongated slots 10 and 11 by means of which the guide plate 8 can be screwed to the lower plate 1 of the stitch-foot in the required adjusted position.
  • the plate 8 is provided in its under surface and upper surface with seats 12 and 13, of which one is positioned on one side and the other one on the other side of the longitudinal center line of the plate.
  • the inner delimitation shoulders 14 and 15 of these seats whose depth corresponds to the thickness of the attachment tapes B B extend from the forward end to the rear end of the plate in oppositely inclined directions toward the longitudinal center line of the plate and intersect the longitudinal center line shortly ahead of the rear edge of the guide plate 8 in such manner that the rear ends of the two shoulders TM and 15 are positioned in a transverse direction at a. slight distance from each other, which distance corresponds to the distance from each other of the two inner edges of the two attachment tapes B B of the completed slide fastener.
  • the guide plate 8 is so adjusted in the lower plate 1 of the stitchfoot that the longitudinal center lines of this guide plate and of the lower plate register vertically. Placed upon this lower plate 1 is then the upper plate 2 (of width equal to that of the lower plate 1) which is secured to the plate 1 by means of bolts extending through the bores 16 of plate 1 and correspondingly threaded bores 17 of plate 2.
  • the upper plate 2 (Figs. 10, 10a) is provided with a slot 19 extending from its forward edge as far as the passage 18 for the two needles, which passage 18 registers with the two bores 7 of the lower plate, and this slot 19 is of a width corresponding to the width of the interlocking helical wires A A and of the guide cords C C
  • Behind the passage 18 for the needles the upper plate is provided on its underside with a longitudinally extending groove 20 whose width and depth correspond to the width and depth of the joined helical wires A A and the sewed on guide cords C C
  • To the slot 19 the two interlocked helical wires A A are fed in the longitudinal direction of the slot 19, and from above the two guide cords C C are fed in such manner that these guide cords correctly register with, that is to say, are correctly positioned on top of the longitudinally extending threads A A and fastening threads of the helical wires.
  • the upper plate 2 is provided, ahead of the passage 18 for the needles, and on each side of the slot 19, with a transverse groove 21 and 22, respectively.
  • guides 23 Arranged in these grooves are guides 23 (see Figs. 11a, which, by means of slots 24 and appropriate screws, can be adjustably rigidly secured to the upper plate 2.
  • These guides 23 have their meeting ends positioned in the area of the slot 19 of the upper plate 2 of the stitch-foot, so that the undersurfaces of these ends prevent the interlocked helical wires fed into the stitch-foot from deviating in a upward direction.
  • each of the guides 23 is provided in one of its lateral edges with a recess 26 in which is engageable the disk-like head 27 (Fig. 4) of a nut adapted to be screwed onto a threaded bolt 28.
  • a threaded bolt provided with a similar disk, which bolt may then be screwed into a parallel bore of the upper plate 2.
  • the mode of operation of the stitch-foot is as follows:
  • the two attachment tapes B B are pulled in flatly crossed position through the recesses 12 and 13, and thereupon in straightened-out positions through the flat space between the upper and lows plates 2 and in the area of the upper surface portion 1a of the lower plate 1.
  • the two interlocked helical Wires A A are passed from the forward end through the slot 19, and through the groove 2t? on the underside of the upper plate 2.
  • the two guide cords C C are fed from above through the guide grooves 25 and likewise passed slightly deflected through the grooves on the underside of the upper plate 2.
  • a guide device for use in double-needle sewing machines for the manufacture of helical-wire slide fasteners of the type comprising two interlocked helical wires provided along their opposite outer surfaces with longitudinally extending fastening threads, respective flexible fastening tapes for the wires and guide cords covering the fastening threads, said guide device comprising a lower plate and a plate rigidly secured on the lower plate, said plates being recessed at their meeting surfaces to form a relatively wide horizontal conduit passage having a downwardly facing longitudinal groove at the center of its rear portion, said passage being of a height, at the sides of its rear portion, substantially the same as the thickness of the fastening tapes, and at the center of its rear portion, substantially the same as the combined thickness of the tapes and the guide cords, the passage being substantially greater in height at its forward portion than at its rear portion, whereby the tapes, wires and cords may be fed in angularly separated relationship into said for ward portion, a guide member adjustably mounted in said forward portion, said guide member being formed with crossed
  • said guide member comprises a transversely adjustable guide plate and wherein said crossed guide channels comprise groovelike vertically oflset recesses extending from the forward edge to the rear edge of said last-named plate, the inner edges of said last named recesses being oppositely inclined and crossing each other a short distance forwardly of the rear edge of the guide plate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US641165A 1956-03-01 1957-02-19 Stitch-foot for use in double-needle sewing machines for the manufacture of helical-wire slide fasteners Expired - Lifetime US2857866A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO4743A DE1030154B (de) 1956-03-01 1956-03-01 Stoffdruecker mit Bandfuehrung fuer eine zur Herstellung von Schraubendraht-Verschluessen dienende Doppelnadelnaehmaschine

Publications (1)

Publication Number Publication Date
US2857866A true US2857866A (en) 1958-10-28

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ID=7350429

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US641165A Expired - Lifetime US2857866A (en) 1956-03-01 1957-02-19 Stitch-foot for use in double-needle sewing machines for the manufacture of helical-wire slide fasteners

Country Status (6)

Country Link
US (1) US2857866A (enrdf_load_stackoverflow)
BE (1) BE555447A (enrdf_load_stackoverflow)
CH (1) CH350945A (enrdf_load_stackoverflow)
DE (1) DE1030154B (enrdf_load_stackoverflow)
FR (1) FR1172753A (enrdf_load_stackoverflow)
GB (1) GB855075A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158118A (en) * 1959-07-14 1964-11-24 Wahl Brothers Attaching method for slide fastener elements
US3633528A (en) * 1969-07-16 1972-01-11 Opti Holding Ag Method of and apparatus for making slide-fastener stringers

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103728A (en) 1957-11-25 1963-09-17 Wahl Brothers Technique for assembling slide fasteners
DE1267898B (de) * 1959-11-24 1968-05-09 Opti Holding Ag Vorrichtung zur Herstellung eines fortlaufenden Reissverschlussgliederstreifens
DE1240317B (de) * 1964-09-30 1967-05-11 Opti Werk G M B H & Co Verfahren und Vorrichtung zur Herstellung von Schraubenfederreissverschluessen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274721A (en) * 1938-05-25 1942-03-03 Marinsky Davis Sewing machine attachment
US2329991A (en) * 1940-05-23 1943-09-21 Crown Fastener Corp Apparatus for attaching separable fasteners

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653559A (en) * 1950-07-21 1953-09-29 Picucci Domenico Tape guiding apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274721A (en) * 1938-05-25 1942-03-03 Marinsky Davis Sewing machine attachment
US2329991A (en) * 1940-05-23 1943-09-21 Crown Fastener Corp Apparatus for attaching separable fasteners

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158118A (en) * 1959-07-14 1964-11-24 Wahl Brothers Attaching method for slide fastener elements
US3633528A (en) * 1969-07-16 1972-01-11 Opti Holding Ag Method of and apparatus for making slide-fastener stringers

Also Published As

Publication number Publication date
FR1172753A (fr) 1959-02-16
GB855075A (en) 1960-11-30
BE555447A (enrdf_load_stackoverflow)
CH350945A (de) 1960-12-31
DE1030154B (de) 1958-05-14

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