US3643353A - Footwear - Google Patents

Footwear Download PDF

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Publication number
US3643353A
US3643353A US25555A US3643353DA US3643353A US 3643353 A US3643353 A US 3643353A US 25555 A US25555 A US 25555A US 3643353D A US3643353D A US 3643353DA US 3643353 A US3643353 A US 3643353A
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US
United States
Prior art keywords
article
footwear according
resin
sheet
heelboard
Prior art date
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
US25555A
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English (en)
Inventor
Donald Weight
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.)
Monsanto Chemicals Ltd
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Monsanto Chemicals Ltd
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.)
Filing date
Publication date
Application filed by Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
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Publication of US3643353A publication Critical patent/US3643353A/en
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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B9/00—Footwear characterised by the assembling of the individual parts
    • A43B9/12—Stuck or cemented footwear
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/10—Surface shaping of articles, e.g. embossing; Apparatus therefor by electric discharge treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/50—Footwear, e.g. shoes or parts thereof
    • B29L2031/507—Insoles

Definitions

  • Prmmrm 22 m2 3. 6 3 1 3 5 3 Invenlor DOW/LID ()JEIG HT A llorney FOOTWEAR This invention relates to footwear, and particularly to an article of outer footwear such as a boot or shoe.
  • Articles of outer footwear such as a boot or shoe normally comprise an insole assembly of a flexible forepart and a relatively stiff heelboard, the edge of the upper being turned underneath the insole assembly and fixed thereto by suitable means. The heel and the sole proper are then fixed to the lower side of the insole assembly in a subsequent operation.
  • the heelboard is of cellulosic or other fibers bonded together by an adhesive such as a styrene-butadiene or other resin
  • the flexible forepart can be of, for example, leather or preferably a foamed resin as described in British Pat. No. 1,198,552 (U.S. Pat. application Ser. No. 793,559, filed Jan. 23, 1969).
  • the lower surface of the heelboard comprises a sheet of resin, the resin being a copolymer of an olefin and a nonhydrocarbon aliphatic monomer or a blend of such a copolymer with a polyolefin.
  • the invention comprises an article of footwear, such as a boot or shoe, having a heelboard and an upper, the outer edge of the upper being bent round the heelboard and adhesively bonded to the lower surface thereof, in which the lower surface of the heelboard comprises a sheet of resin, the resin being a copolymer of at least one olefin and at least one nonhydrocarbon aliphatic monomer or a blend of such a copolymer with at least one polyolefin, so as to improve the strength of the adhesive bond.
  • Also part ofthe invention is aheelboard having a lower surface as defined above.
  • the resin sheet extends completely over the lower surface of the heelboard, and preferably also it is integral with a flexible forepart so as to form an insole assembly.
  • An unsaturated ester can be the result of the reaction of an unsaturated alcohol with a saturated acid, of a saturated alcohol with an unsaturated acid or of an unsaturated alcohol with an unsaturated acid so that suitable esters include for example vinyl acetate, ethyl acrylate and allyl methacrylate.
  • suitable esters include for example vinyl acetate, ethyl acrylate and allyl methacrylate.
  • Preferred unsaturated esters are those formed from a lower unsaturated alcohol and a lower aliphatic carboxylic acid.
  • the unsaturated alcohol portion ofsuch an acid comonomer can for instance contain up to four carbon atoms such as, for example, allyl alcohol or a methallyl alcohol but preferably the alcohol is the notional vinyl alcohol.
  • FIG. 1 a perspective view of an insole heelboard according to the invention
  • FIG. 2 a section through a shoe incorporating the insole assembly shown in FIG. 1.
  • the insole assembly consists of a heelboard (1) and a flexi' ble forepart (2), the flexible forepart and the lower surface of the heelboard being composed of a sheet of foamed resin.
  • the heelboard (1) comprises .a shank board (3), for example of cellulose fiber, skived to zero thickness at its forward end (4) and adhered to the upper surface of the sheet of foamed resin.
  • the shoe illustrated in FIG. 2 comprises an insole assembly (5) having a heelboard (6), the lower surface (7) of which is composed of a sheet of foamed resin which forms the forepart (8).
  • the resin preferably contains from about 2 to about 17 percent by weight of the nonhydrocarbon monomer, more preferably from about 3 to about 15 percent by weight and for example from about 3 to about 5 or from about 10 to about 13 percent by weight. Excellent results have been obtained em ploying resins containing respectively about 4 percent and about 12 percent of the nonhydrocarbon monomer.
  • the resin comprises a copolymer of the olefin and the nonhydrocarbon monomer, but it can be a blend of such a copolymer with a polyolefin, and in this: event, of course, the proportion of nonhydrocarbon monomer in the copolymer can be greater than about 17 percent by weight, for instance up to about 30 percent or about 45 percent by weight, sufficient polyolefin being blended with the copolymer to reduce the amount of nonhydrocarbon monomer in the resin as a whole to the value desired.
  • the polyolefin can be of the low-pressure" type, for example a polyethylene or polypropylene made using a chromium oxide or organometallic catalyst system but preferably it is a highpressure polyethylene, for instance having a density from about 0.90 to 0.94 grams per cc.
  • the copolymer can itself be a blend of two copolymers of an olefinic hydrocarbon and nonhydrocarbon monomer.
  • the resin sheet is foamed.
  • the foam has a substantially closed cell structure, by which it is meant that the majority, normally at least percent, of the cells are closed.
  • the majority of the cells, more preferably at least 75 percent, of the cells have a diameter from 0.004 to 0.04 inch, for example from 0.01 to 0.03 inch.
  • the density of the foamed sheet is very often from 20 to 40 pounds per cubic foot, a density at the at lower end of this range, for example about 24 pounds per cubic foot, being usually most suitable.
  • the foamed sheet may have a nonfoamed skin on each side, but this is not usually thicker than about 0.002 inch.
  • the sheet is preferably an extruded one.
  • a nonfoamed sheet can be made by conventional methods, while a foamed sheet is normally made by extruding a foamable mixture of the resin and a suitable blowing agent under pressure through a die into a zone of lower pressure (usually the atmosphere) so that the expansion of the blowing agent and foaming of the resin takes place.
  • a slit die is used, although it is perfectly possible to employ an annular die to extrude a tube of resin that is later slit longitudinally and opened out into a flat sheet.
  • U.S. Pat. application Ser. No. 27,973 filed Apr. 13, 1970 describes a process for producing a flat sheet ofa foamed thermoplastic synthetic resin, which comprises extruding a layer of a foamable thermoplastic synthetic resin through a slit die orifice into contact with the cylindrical surface of a single roller rotatable about an axis parallel to the slit, such that the layer foamed while it is in contact with the rotating roller surface and expansion in a direction parallel to the slit is substantially limited by such contact, and withdrawing the resulting foamed sheet from the roller.
  • blowing agent is a permanent gas it is more convenient to consider relative volumes at Standard Temperature and Pressure, and for example the use of0.5 to parts, preferably from 1 to 2 parts by volume of nitrogen at S.T.P. in conjunction with 1 part by volume of polyethylene has given excellent results. Often the use of amounts of blowing agent at the lower end of the above ranges results in the production of a thicker sheet.
  • the blowing agent is employed in conjunction with a nucleating agent, which assists in the formation of a large number of fine cells.
  • nucleating agents can be employed, including finely divided inert solids such as for example silica or alumina (if desired in conjunction with zinc stearate), or small quantities or a substance that decomposes at the extrusion temperature to give a gas can be used.
  • An example of the latter class of nucleating agents is sodium bicarbonate, if desired in conjunction with a weak acid such as for example tartaric or citric acid. Boric acid, calcium acetate, calcium propionate and calcium benzoate are each excellent nucleating agents.
  • a small proportion of the nucleating agent for example up to 5 percent by weight of the resin, is usually effective.
  • the resin can also contain such additives as coloring agents, antioxidants, stabilizers, lubricants and so on if desired.
  • the resin sheet is preferably bonded to the heelboard by means of an adhesive, for example a cold or hot-melt adhesive.
  • an adhesive for example a cold or hot-melt adhesive.
  • suitable adhesives include polyvinyl acetate, polyurethane and neoprene, adhesives as well as hotmelt adhesives of the polyester or polyamide type. Alternatively, heat-sealing can be employed.
  • any metal platen or press foot maintained in contact with the insole during the process should normally be at a temperature lower than the softening point of the resin.
  • Rubber vulcanizing is not in general a suitable method, owing to the excessive temperature/time cycles involved.
  • Traditional methods such as stitching or nailing can, of course, be employed, for example for fixing the sole and heel, but this in not preferred since full benefit from the advantages of the invention is not thereby achieved.
  • heelboard itself is not of great importance, any conventionally used material such as for instance cardboard or a resin-bonded cellulosic fiber board being normally suitable. However, it should be remembered that the invention may permit the employment of a somewhat cheaper material than would otherwise be possible.
  • Both sides of the sheet were subjected to the action of an alternating electric discharge of 10,000 volts and 3 kilocycles per second, by passing the sheet between two electrodes spaced 0.15 inch apart, each part of the sheet being exposed to the discharge for one tenth ofa second.
  • EXAMPLE II This example describes another shoe according to the invention, the proportion of polymerized vinyl acetate in the resin ofthe insole being lower than in the previous example.
  • copolymers of at least one olefin with at least one nonhydrocarbon aliphatic monomer comprising about 3 to about 15 percent by weight ofsaid copolymer;
  • B blends ofA with at least one polyolefin, whereby the adhesive bond between the upper and the heelboard is strengthened.
  • I An article of footwear according to claim 1, in which the resin sheet extends completely over the lower surface of the heelboard.
  • resin sheet is one that has been subjected to the electric discharge.
  • An article offootwear according to claim 1 in which the adhesive bond between the outer edge of the upper and the resin sheet is achieved by means of an adhesive selected from the group consisting of cold adhesives, hotmelt adhesives, polyurethane adhesives and neoprene adhesivesv l7.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US25555A 1969-04-25 1970-04-03 Footwear Expired - Lifetime US3643353A (en)

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GB2133269 1969-04-25

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291428A (en) * 1979-01-11 1981-09-29 Onorio Anzani Process for the manufacture of moulded insoles
US5787610A (en) * 1996-05-29 1998-08-04 Jeffrey S. Brooks, Inc. Footwear
US20030213147A1 (en) * 2002-05-16 2003-11-20 Yi-Hsi Chen Insole of a shoe
US6854198B2 (en) 1996-05-29 2005-02-15 Jeffrey S. Brooks, Inc. Footwear
US20110023324A1 (en) * 2009-08-03 2011-02-03 Dananberg Howard J Footwear sole
US20110192049A1 (en) * 2010-02-09 2011-08-11 Nike, Inc. Footwear Component for an Article of Footwear
US8893406B2 (en) 2010-02-09 2014-11-25 Nike, Inc. Footwear component for an article of footwear
US20180271210A1 (en) * 2015-09-18 2018-09-27 Asics Corporation Shoe sole member and shoe
US10390587B2 (en) 2016-03-01 2019-08-27 Hbn Shoe, Llc Device for high-heeled shoes and method of constructing a high-heeled shoe
US10477915B2 (en) 2016-03-01 2019-11-19 Hbn Shoe, Llc Device for high-heeled shoes and method of constructing a high-heeled shoe
US10702008B2 (en) 2018-02-26 2020-07-07 Hbn Shoe, Llc Device and method of constructing shoes
US20220175087A1 (en) * 2019-03-05 2022-06-09 Klaus Fürst VON SAYN-WITTGENSTEIN Shoe insert
US11540588B1 (en) 2021-11-24 2023-01-03 Hbn Shoe, Llc Footwear insole
US11805850B1 (en) 2023-07-19 2023-11-07 Hbn Shoe, Llc Cuboid pad

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2692276A1 (fr) * 1992-06-12 1993-12-17 Bostik Sa Procédé de préparation de surface en vue du collage d'articles en polyoléfine, articles ainsi obtenus et application à l'industrie de la chaussure.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1701896A (en) * 1927-10-28 1929-02-12 Richard Remy Method for manufacturing boots and shoes
US2101693A (en) * 1935-04-16 1937-12-07 Taraci Joseph Shoe structure
US2287643A (en) * 1935-03-26 1942-06-23 Ruggiero Anthony Shoe
US2467386A (en) * 1945-06-05 1949-04-19 Jacob S Kamborian Force-lasted shoe with end stiffener and method of making same
US2909854A (en) * 1957-08-14 1959-10-27 Edelstein Marie Pressure relieving insoles
US3342902A (en) * 1965-07-21 1967-09-19 Sun Oil Co Hot melt adhesive having pressure sensitivity comprising atactic polypropylene, ethylene-vinyl acetate copolymer, and a polyterpene
US3431163A (en) * 1964-07-09 1969-03-04 Monsanto Chemicals Foamed aliphatic resin products having elongated cells at right angles to a surface skin and their manufacture
US3449844A (en) * 1967-05-05 1969-06-17 Spenco Corp Protective inner sole

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1701896A (en) * 1927-10-28 1929-02-12 Richard Remy Method for manufacturing boots and shoes
US2287643A (en) * 1935-03-26 1942-06-23 Ruggiero Anthony Shoe
US2101693A (en) * 1935-04-16 1937-12-07 Taraci Joseph Shoe structure
US2467386A (en) * 1945-06-05 1949-04-19 Jacob S Kamborian Force-lasted shoe with end stiffener and method of making same
US2909854A (en) * 1957-08-14 1959-10-27 Edelstein Marie Pressure relieving insoles
US3431163A (en) * 1964-07-09 1969-03-04 Monsanto Chemicals Foamed aliphatic resin products having elongated cells at right angles to a surface skin and their manufacture
US3342902A (en) * 1965-07-21 1967-09-19 Sun Oil Co Hot melt adhesive having pressure sensitivity comprising atactic polypropylene, ethylene-vinyl acetate copolymer, and a polyterpene
US3449844A (en) * 1967-05-05 1969-06-17 Spenco Corp Protective inner sole

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EVA copolymers Modern Plastics Encyclopedia 1968 pgs. 210 213. *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291428A (en) * 1979-01-11 1981-09-29 Onorio Anzani Process for the manufacture of moulded insoles
US5787610A (en) * 1996-05-29 1998-08-04 Jeffrey S. Brooks, Inc. Footwear
US6854198B2 (en) 1996-05-29 2005-02-15 Jeffrey S. Brooks, Inc. Footwear
US20030213147A1 (en) * 2002-05-16 2003-11-20 Yi-Hsi Chen Insole of a shoe
US8166674B2 (en) 2009-08-03 2012-05-01 Hbn Shoe, Llc Footwear sole
US20110023324A1 (en) * 2009-08-03 2011-02-03 Dananberg Howard J Footwear sole
US9565897B2 (en) 2010-02-09 2017-02-14 Nike, Inc. Footwear component for an article of footwear
US8893406B2 (en) 2010-02-09 2014-11-25 Nike, Inc. Footwear component for an article of footwear
US9060569B2 (en) 2010-02-09 2015-06-23 Nike, Inc. Footwear component for an article of footwear
US20110192049A1 (en) * 2010-02-09 2011-08-11 Nike, Inc. Footwear Component for an Article of Footwear
US9668543B2 (en) 2010-02-09 2017-06-06 Nike, Inc. Footwear component for an article of footwear
US8479416B2 (en) 2010-02-09 2013-07-09 Nike, Inc. Footwear component for an article of footwear
US10856604B2 (en) * 2015-09-18 2020-12-08 Asics Corporation Shoe sole member and shoe
US20180271210A1 (en) * 2015-09-18 2018-09-27 Asics Corporation Shoe sole member and shoe
US10390587B2 (en) 2016-03-01 2019-08-27 Hbn Shoe, Llc Device for high-heeled shoes and method of constructing a high-heeled shoe
US10729205B2 (en) 2016-03-01 2020-08-04 Hbn Shoe, Llc Device for high-heeled shoes and method of constructing a high-heeled shoe
US10477915B2 (en) 2016-03-01 2019-11-19 Hbn Shoe, Llc Device for high-heeled shoes and method of constructing a high-heeled shoe
US10702008B2 (en) 2018-02-26 2020-07-07 Hbn Shoe, Llc Device and method of constructing shoes
US20220175087A1 (en) * 2019-03-05 2022-06-09 Klaus Fürst VON SAYN-WITTGENSTEIN Shoe insert
US11540588B1 (en) 2021-11-24 2023-01-03 Hbn Shoe, Llc Footwear insole
US11805850B1 (en) 2023-07-19 2023-11-07 Hbn Shoe, Llc Cuboid pad

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GB1264853A (id) 1972-02-23

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