US3689952A - Heel moulding bands - Google Patents

Heel moulding bands Download PDF

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Publication number
US3689952A
US3689952A US27534A US3689952DA US3689952A US 3689952 A US3689952 A US 3689952A US 27534 A US27534 A US 27534A US 3689952D A US3689952D A US 3689952DA US 3689952 A US3689952 A US 3689952A
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United States
Prior art keywords
lining
body portion
band
heel
fabric
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Expired - Lifetime
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US27534A
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English (en)
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Peter H V Dawson
Norman S Smith
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Individual
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Individual
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D23/00—Single parts for pulling-over or lasting machines

Definitions

  • ABSTRACT A method of making moulding bands for shoemaking machines in which a thermoplastic lining material having a low coefficient of friction is secured to a resilient material forming the body of the moulding band through a fabric material.
  • the band has a lining suitable for engagement with a shoe upper, the lining being bonded to a resilient body through a fabric and the body having a cavity filled with a particulate material so the band accommodates to various dimensions and contours of a shoe form.
  • thermoplastic material of low friction coefficient is securely bonded to a flexible, moulded substrate for use as a forming device for conforming shoe parts to the shape of an inner'form or last.
  • the invention provides a method of bonding thermoplastic sheet material having a low coefficient of friction to a flexible moulded material, to provide a forming device for conforming shoe parts to the shape of an inner form or last, comprising the steps of (a) assembling a layer of woven heat-resistant fabric in contact with one surface of said sheet material (b) applying conditions of elevated tem-' perature and pressure thereto such as to soften said thermoplastic material sufficiently to permit said fabric to become partially embedded therein, shaping the heated assembly of material and fabric so produced to the contour required for said forming device, (d) allowing the shaped assembly to cool (e) placing the cooled assembly in a mould device such that at least a portion of a cavity contained within the device is defined by a surface consisting of the fabric of said assembly and (f) filling said mould cavity with said flexible material in a mouldable condition.
  • the invention further provides a heel band.
  • a heel band for use in conforming a back-part of a shoe upper assembly to the shape of a form or last, comprising a main portion of generally horseshoe configuration in plan view and consisting of moulded flexible material, and a lining of thermoplastic material having a low coefficient of friction provided around an inside curved surface of said main portion and bonded to said portion through a layer of fabric.
  • the main portion of the heel band may be moulded so as to be hollow, that is, provided with a horseshoeshaped cavity enclosed by moulded material.
  • This cavity may be filled with a suitable medium to enhance the upper-conforming properties of the heel band, for example, particulate material which may be in the form of small glass pellets.
  • a heel band is ideally so constructed as to be capable of operating on right or left shoes, the medium in the hollow cavity being capable of flowing within the cavity to accommodate various dimensions and contours of the inner form or last.
  • FIG. 1 is a perspective view of the illustrative heel band
  • FIG. 2 is a section taken on line II II of FIG. I;
  • FIG. 3 is a diagrammatic representation of an assembly of thermoplastic sheet material and woven fabric during a step of the illustrative method.
  • thermoplastic sheet material (0.75 mm nominal thickness) consisting of ultra-high molecular weight (greater than one million) polyethylene and of a size suitable for operation in a convenient press, is included in a multilayer assembly comprising a layer of fine, knitted cotton fabric in immediate contact with the polyethylene.
  • a layer of sheet rubber is then placed over the cotton fabric witha layer of plastic material between the rubber and the cotton to prevent sticking, the plastic material being, in the present example, polyethylene terephthalate film available under the trade name Melinex.”
  • the assembly of layers is held rigid by two thin gauge aluminum plates, each separated by inter-layer of Melinex from direct contact with the rubber layer or the polyethylene layer respectively.
  • the multilayer assembly is shown in FIG.
  • the assembly comprising an upper aluminum plate 6, the layer of sheet rubber 8, the cotton fabric 10, the layer of polyethylene l2 and a lower aluminum sheet 14, there being provided inter-layers of Melinex 16 between these layers with' the exception of the cotton layer and the polyethylene which are to be bonded together.
  • the assembly is heated to 210 C and subjected to a pressure of 400 p.s.i. for 20 minutes in the press.
  • the assembly is then removed and allowed to cool in a flat condition, maintained if necessary with a light (for example 20 lb.) weight.
  • the cotton fabric is now partially embedded in the polyethylene.
  • the polyethylene layer is to be used as the lin ing for use in the illustrative heel band
  • a portion of the polyethylene of somewhat larger dimensions than the amount of lining required for the band is placed around a heel form chosen of a size somewhat larger than a form the band will be required to be used with when complete.
  • the use of this over-size form ensures that the correct size of lining is achieved despite shrinkage during the next step of the illustrative method in which the polyethylene/cotton layer is reheated and shaped around the oversize form.
  • the polyethylene/cotton layer retains the horseshoe-configuration required for incorporation into the heel band.
  • the polyethylene/cotton layer (hereinafter referred to as the lining, indicated at 20) is to be temporarily secured at each of the two end portions thereof to the end portions of a spring steel horseshoe-shaped backing band 22.
  • Each end portion of the lining 20 is provided with a flange 24 provided with a plurality of holes 26, and these flanges are held in place against the end portions of the steel backing band.
  • the lining and backing band are then in the arrangement of a double horseshoe one within the other, and the next step is to fill the horseshoe-shaped space between the lining and the backing band with a material which I is flexible enough to withstand repeated opening and closing of the completed heel band.
  • a mould cavity is therefore constructed which comprises an upper mould plate and a lower mould plate, with remaining side surfaces of the cavity consisting of the fabric-lined surface of the lining 20 and the inner surface of the backing band22.
  • the cavity is then filled with polyurethane according to known techniques of polyurethane moulding.
  • the material flows into the interstices of the cotton fabric of the lining 20 and forms a strong mechanical bond; it flows into the holes 26 of the flanges 24 of the lining and into further holes 28 provided in lugs 30 of the lin ing 20 which are turned over against the moulding plate to provide extra keying surfaces for the polyurethane to bond to.
  • each end portion of the backing band is coated with a primer to enhance the adhesion of the polyurethane to the steel, but, to ensure that the heel band will be flexible at the intermediate portion, i.e., the bight of the heel band, it is coated with a conventional mould release or parting agent, so that the polyurethane 21 does not adhere to the backing band 22 at this portion but is able to leave a slight gap 32 when the band is not in the fully closed position.
  • the illustrative heel band is provided with a horseshoe-shaped cavity 34 which extends within the polyurethane main portion of the band around the greater portion of the length thereof.
  • This cavity is formed by inserting a core of low-melting point metal (in the illustrative method a metal alloy available under the trade'name Cerrobend") into the mould cavity before the polyurethane is moulded therein.
  • the core is supported in the mould cavity by tours of the heel end of a shoe,
  • the Cerrobend is melted out by heating the band in an oven at C, the alloy running out through holes 36 (only one shown in FIG. 1) left after the removal of the e p
  • the cavity 34 is then filled with particulate material in the form of small (1/15) glass beads 38, and the holes 36 sealed.
  • the backing band 22 is provided with hook-shaped lugs 40 by which it is attachable to a suita It will be understood that, alternatively, the cavity 34 may be connected to a source of compressed air so that the heel band may be inflated in order to provide the desired operating characteristics.
  • a heel moulding band for a shoe machine comprising a lining of material having a low coefficient of friction, said lining having an exposed shoe upper engaging surface shaped to conform generally to the cona main flexible body portion shaped to support said lining, and means for securing the lining to the body portion including a layer of fabric material having one face partially embedded in the inner surface of said lining so as to be mechanically attached thereto and having the other face of the fabric material bonded to the body portion.
  • a heel moulding band for a shoe machine comprising a main flexible body portion provided with a hollow core filled with a particulate material, a lining of material having a low coefficient of friction, and means for securing the lining and the body portion together comprising a layer of fabric material having one face partially embedded in the lining material so as to be mechanically bonded thereto and having the other face of the fabric material bonded to the body portion.
  • a heel moulding band for a shoe machine comprising a main flexible body portion, a lining of material having a low coefficient of friction, and means for securing the lining and the body portion together comprising a layer of fabric material .having one face partially embedded in the lining material so as to be mechanically bonded thereto and having the other face of the fabric material bonded to the body portion, said body portion being formed of polyurethane and the lining material being formed of ultra-high molecular weight (greater than 1 million) polyethylene.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US27534A 1969-04-16 1970-04-13 Heel moulding bands Expired - Lifetime US3689952A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1933469 1969-04-16

Publications (1)

Publication Number Publication Date
US3689952A true US3689952A (en) 1972-09-12

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ID=10127613

Family Applications (1)

Application Number Title Priority Date Filing Date
US27534A Expired - Lifetime US3689952A (en) 1969-04-16 1970-04-13 Heel moulding bands

Country Status (6)

Country Link
US (1) US3689952A (de)
CA (1) CA930907A (de)
DE (1) DE2017627C3 (de)
FR (1) FR2043400A5 (de)
GB (1) GB1296376A (de)
ZA (1) ZA702513B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787915A (en) * 1972-11-17 1974-01-29 Tech Cuir Centre Device for mounting the toe and heel ends of a shoe upper
US4246673A (en) * 1978-04-04 1981-01-27 Usm Corporation Band for operating on shoes
US4490868A (en) * 1983-09-23 1985-01-01 International Shoe Machine Corporation Composite band for a footwear-forming machine
US4660242A (en) * 1986-03-24 1987-04-28 International Shoe Machine Corporation Activator
US5706538A (en) * 1994-02-03 1998-01-13 International Shoe Machine Corporation Composite band for use in a footwear forming machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109549288A (zh) * 2018-10-31 2019-04-02 际华三五五皮革皮鞋有限公司 一种素头鞋靴套楦结构前头定型的装置及方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339774A (en) * 1942-07-22 1944-01-25 United Shoe Machinery Corp Lasting machine
US2593553A (en) * 1946-05-31 1952-04-22 American Viscose Corp Apparatus for producing coated fabrics
US2750321A (en) * 1951-09-04 1956-06-12 Raymond De Icer And Engineerin Antennas and material for fabrication thereof
US2806509A (en) * 1956-06-11 1957-09-17 Goodyear Aircraft Corp Sandwich structures
US3051968A (en) * 1960-11-17 1962-09-04 Compo Shoe Machinery Corp Toe lasting machines
US3082485A (en) * 1958-04-07 1963-03-26 American Metal Prod Elements having low friction material compacted on teh face thereof
US3510392A (en) * 1968-09-16 1970-05-05 Pittsburgh Corning Corp Glass nodules in cellular polyurethane

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339774A (en) * 1942-07-22 1944-01-25 United Shoe Machinery Corp Lasting machine
US2593553A (en) * 1946-05-31 1952-04-22 American Viscose Corp Apparatus for producing coated fabrics
US2750321A (en) * 1951-09-04 1956-06-12 Raymond De Icer And Engineerin Antennas and material for fabrication thereof
US2806509A (en) * 1956-06-11 1957-09-17 Goodyear Aircraft Corp Sandwich structures
US3082485A (en) * 1958-04-07 1963-03-26 American Metal Prod Elements having low friction material compacted on teh face thereof
US3051968A (en) * 1960-11-17 1962-09-04 Compo Shoe Machinery Corp Toe lasting machines
US3510392A (en) * 1968-09-16 1970-05-05 Pittsburgh Corning Corp Glass nodules in cellular polyurethane

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787915A (en) * 1972-11-17 1974-01-29 Tech Cuir Centre Device for mounting the toe and heel ends of a shoe upper
US4246673A (en) * 1978-04-04 1981-01-27 Usm Corporation Band for operating on shoes
US4490868A (en) * 1983-09-23 1985-01-01 International Shoe Machine Corporation Composite band for a footwear-forming machine
US4660242A (en) * 1986-03-24 1987-04-28 International Shoe Machine Corporation Activator
US5706538A (en) * 1994-02-03 1998-01-13 International Shoe Machine Corporation Composite band for use in a footwear forming machine

Also Published As

Publication number Publication date
DE2017627A1 (de) 1971-01-21
DE2017627C3 (de) 1975-11-06
ZA702513B (en) 1971-09-29
DE2017627B2 (de) 1975-03-20
CA930907A (en) 1973-07-31
FR2043400A5 (de) 1971-02-12
GB1296376A (de) 1972-11-15

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