US3154843A - Method of fabricating slide fasteners - Google Patents

Method of fabricating slide fasteners Download PDF

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Publication number
US3154843A
US3154843A US164857A US16485762A US3154843A US 3154843 A US3154843 A US 3154843A US 164857 A US164857 A US 164857A US 16485762 A US16485762 A US 16485762A US 3154843 A US3154843 A US 3154843A
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United States
Prior art keywords
mandrel
strip
winding
helical path
crease
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US164857A
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English (en)
Inventor
Takagi Toshiaki
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.)
NIPPON SHINPU KK
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NIPPON SHINPU KK
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Filing date
Publication date
Application filed by NIPPON SHINPU KK filed Critical NIPPON SHINPU KK
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Publication of US3154843A publication Critical patent/US3154843A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D5/00—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners
    • B29D5/06—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners the interlocking members being formed by continuous helix
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/10—Slide fasteners with a one-piece interlocking member on each stringer tape
    • 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
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/14—Twisting
    • 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
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49782—Method of mechanical manufacture of a slide fastener
    • Y10T29/49785—Method of mechanical manufacture of a slide fastener of interlocking element

Definitions

  • the forming of the fastener member consists of two forming operation stages.
  • the first forming stage comprises wrapping a strip of starting material of fiat, rectangular cross section in a helical path about a circular rod or mandrel and, then stretching this wrapped starting material in the axial direction.
  • the second stage comprises winding the material obtained by the first stage about a bar or mandrel of slightly greater thickness than that of the rod used in the first stage in a helical path, the direction of which is opposite that of the helical path of the first stage.
  • the material produced by this second stage is used as one slide fastener member of a pair of slide fastener members to constitute the complete fastener assembly.
  • the other slide fastener member of the pair is similarly made except hat the helical directions in each of its forming stages are the opposite of the corresponding directions of the first slide fastener member.
  • Each of the slide fastener members is fixed along a side edge thereof perpendicular to its engagement part to the side edge of one of the base articles to be fastened.
  • FIG. 1 is a perspective view showing a portion of a strip of starting material for the fabrication method of the present invention
  • FlG. 2 is a partial side elevational view indicating the first forming stage according to the method of the present invention
  • FIG. 3 is a partial side elevational view showing the intermediate material produced by the first forming stage
  • FIG. 4 is a partial side elevational view illustrating the second forming stage
  • FIG. 5 is a side elevational view showing the attachment of a slide fastener member to the edge of a base article
  • FIG. 6 is a plan view showing a pair of slide fastener members in their engaged or closed state.
  • FIG. 7 is an end elevational view, partly in cross section and with parts cut away, showing the completed slide fastener in the closed state.
  • a strip of starting material 1 having a flat, rectangular cross section is prepared from a tough material which can be deformed elastically, such as for example, a light metal or a nylon material.
  • This starting material 1 is first wrapped about a rod or mandrel 2 of circular cross section in a helical path of either a right-hand screw or a lefthand screw as indicated in FIG. 2. Then the said starting material is stretched in the axial direction to provide a first-stage formed material 3 which is twist turned along its entire length as shown in FIG. 3.
  • This first-stage formed material 3 is wound about a rod or mandrel 5 of slightly greater thickness than the rod 2 in a helical path the direction or" which is opposite that of the helical path of the first forming stage.
  • crease-bent portions 6 are formed by the periphery of the rod 5, and a second-stage formed material as shown in FIG. 4 is obtained.
  • the bending of the crease-bent portions 6 caused by the periphery of the rod 5 is limited to only those portions of the twist-turned strip material wound about the rod 5 which are substantially parallel to the peripheral surface of the rod 5'. Since a similar bending of the portions B or" the strip material which are substantially perpendicular to the rod 5 is diliicult or impossile, the crease-bent portions 6 are automatically formed at accurately constant geometrical intervals.
  • the material (FIG. 4) formed in the above-described manner is pulled from th rod 5 and is used as one of a pair of slide fastener members.
  • This slide fastener memher 8 is fixed integrally to its supporting base material, for example, a flexible bead material 12 joined to one side edge ll of a tape it by the interweaving of a thread 23 which binds the twist-turned portion 9 of the side surface at 96 degrees of angle to the engaging portion of the slide fastener member 8 and a thread 14 which is connected to the bead material 12.
  • the slide fastener member 8 is combined with another similar member 8a to form a pair, the two members 8 and 8:: having mutually opposite directions of helical winding produced during their respective aforesaid second f rming stages. That is, if one member 3 is wound in a right-hand helical path, the other member 3a is wound in a left-hand helical path. Accordingly, the starting materials for the two members 3 and 8a are also wrapped in helical paths of mutually opposite directions d their respective first forming stages.
  • the mechanism of fastening that is, the mutual engage ment or meshing of a pair of slide fastener members 8 and 5a will now be considered in detail.
  • the rod 5 used a forming mandrel in the second forming stage is a bar with a square cross section
  • the helically wound fastener members 8 and 8 have cross sections based on a square.
  • side edges 11 and 11a of a pair of tapes it? and Ella are crease-bent and joined to head materials 12 and 12a, respectively.
  • the members 8 and 8a are so positioned on and so bound to the bead materials 12 and 12:: that, in the assembled state for operation, their respective twist-turned portions 15' and 15a, which are continuations of the helically wound members 8 and 8a from the attachment, twist-turned portions 9 and 9a by way of the crease-bent portions 6 and 6a, are caused to become mutually engaged or meshed.
  • the slider (not shown) for effecting this engagement of the members 8 and 8a have an internal guide slot which, unlike the horizontal slot of the conventional slider, imparts a rotation to the '3 members 8 and 8a so that, as the member 8 is rotated through 90 degrees of angle, the portions 15 and 15a are caused to be mutually inserted into the gaps in the opposite helical members.
  • the bead materials 12 and 12a are caused .to be aligned tightly in parallel rows as shown in FIG. 7, the pair of fastener members 8 and 8a being fastened with their twist-turned portions 15 and 15 in'continuous engagement on one side of the said rows.
  • the orientations of the twist-turned portions 15 and 15a are also mutually opposite. Accordingly, once these portions are engaged, they offer extremely strong resistance to tensile force in the lateral direction. That is, the higher the lateral tensile force is, the greater is the tendency of the twist-turned portions 15 and 15a to enter into a state of tighter mutual engagement, wherefore unintentional disengagement is resisted automatically. For intentional disengagement, reverse rotation is imparted by means of the slider, whereby the twist-turned portions 15 and 15a are easily disconnected.
  • a strip starting material 1 is first formed into a helically wrapped configuration, then stretched in the axial direction to form a material 3 which has a twist-turned configuration along its entire length; then this material 3 is wound, in the opposite helical direction, about a rod 5 which is provided with guidecorners 4 to form crease-bent portions 6.
  • the resulting fastener member consists of a continuous, twisted strip surface; and, at the same time, the crease-bent portions 6 precisely establish its cylindrical outer configuration suitable for its purpose as a fastener membe Moreover, since these crease-bent portions 6 are formed at only those portions of the twist-turned strip material which are substantial parallel to the peripheral surface of the rod 5, and the portions which are substantially perpendicular to the said surface and the contiguously adjacent portions are not crease-bent, uniform spacing or pitch of the crease-bent portions 6 is automatically established. Accordingly, by the use of simple helical winding steps, a continuous member with engagement gaps necessary for its purpose as a fastener member 8 is formed in a simple manner.
  • aislide fastener which is superior to conventional slide fasteners in several features, particularly in resistance to unintentional disengagement, can be obtained by an extremely simple fabrication method, which, because of its simplicity and low cost is readily applicable to quantity prodnction.
  • a method of manufacturing slide fasteners comprising winding a first strip of fiat rectangular material about a first mandrel of circular cross section in a helical path, removing said wound strip from said first mandrel, stretching said helically wound strip in an axial direction for obtaining a first twisted strip, winding said first twisted strip about a second mandrel of rectangular cross-section in a helical path in a direction opposite to the path about the first mandrel for forming a first spiral fastener component having crease bent portions provided by the corners of said second mandrel, removing said first component from said second mandrel, winding a second strip of flat rectangular material about a mandrel identical to said first mandrel in a helical path opposite to that of the first strip, removing said second helically wound strip from said mandrel, stretching said second helically wound strip in an axial direction, for obtaining a second twisted strip and winding said second stretched helically wound strip about
  • a method of manufacturing slide fasteners comprising winding a first strip of flat rectangular material about a first mandrel of circular cross-section in a helical path, removing said wound strip from said first mandrel, stretching said helically wound strip in an axial direction for obtaining a first twisted strip, winding said first twisted strip about a second mandrel of rectangular cross-section in a helical path in a direction opposite to the path about the first mandrel for forming a first spiral fastener component having crease bent portions provided by the corners of said second mandrel, removing said component from said second mandrel winding a second strip of fiat rectangular material about 'a mandrel identical to said first mandrel in a helical path opposite to that of the first strip, removing said second helically wound strip from said mandrel stretching said second helically wound strip in an axial direction for obtaining a second twisted strip, winding said second twisted strip about a mandrel

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Slide Fasteners (AREA)
US164857A 1961-01-12 1962-01-08 Method of fabricating slide fasteners Expired - Lifetime US3154843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP94361 1961-01-12

Publications (1)

Publication Number Publication Date
US3154843A true US3154843A (en) 1964-11-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
US164857A Expired - Lifetime US3154843A (en) 1961-01-12 1962-01-08 Method of fabricating slide fasteners

Country Status (3)

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US (1) US3154843A (enrdf_load_stackoverflow)
CH (1) CH382429A (enrdf_load_stackoverflow)
NL (1) NL273498A (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB553856A (en) * 1942-06-08 1943-06-08 Dow Chemical Co Improvements in or relating to sliding clasp fasteners
US2929135A (en) * 1954-05-18 1960-03-22 Stahlwerk Kabel C Pouplier Jr Process for manufacturing multiple coil springs for slide fasteners and method of attachment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB553856A (en) * 1942-06-08 1943-06-08 Dow Chemical Co Improvements in or relating to sliding clasp fasteners
US2929135A (en) * 1954-05-18 1960-03-22 Stahlwerk Kabel C Pouplier Jr Process for manufacturing multiple coil springs for slide fasteners and method of attachment

Also Published As

Publication number Publication date
NL273498A (enrdf_load_stackoverflow)
CH382429A (fr) 1964-09-30

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