IE41480B1 - Improvements in or relating to footwear - Google Patents

Improvements in or relating to footwear

Info

Publication number
IE41480B1
IE41480B1 IE136075A IE136075A IE41480B1 IE 41480 B1 IE41480 B1 IE 41480B1 IE 136075 A IE136075 A IE 136075A IE 136075 A IE136075 A IE 136075A IE 41480 B1 IE41480 B1 IE 41480B1
Authority
IE
Ireland
Prior art keywords
layer
reinforcing layer
insole
underside
board
Prior art date
Application number
IE136075A
Other versions
IE41480L (en
Original Assignee
Clarks 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 Clarks Ltd filed Critical Clarks Ltd
Publication of IE41480L publication Critical patent/IE41480L/en
Publication of IE41480B1 publication Critical patent/IE41480B1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
    • A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
    • A43B7/1415—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot
    • A43B7/144—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot situated under the heel, i.e. the calcaneus bone
    • 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
    • A43B13/41—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process combined with heel stiffener, toe stiffener, or shank stiffener

Abstract

1521682 Insoles CLARKS Ltd 13 June 1975 [19 June 1974] 27284/74 Heading A3B An insole comprises an upper layer 10 of flexible board, a plastics reinforcing layer 12 underlying the waist and heel seat portions of the upper layer and bonded thereto, and a layer 11 of fabric bonded to the underside of the reinforcing layer and to the underside of the board across the width of the board just forward of the waist portion and the forward edge of the reinforcing layer, wherein the waist portion of the reinforcing layer adjacent the longitudinal centre line is thicker than the side edges of that layer. A recess 15 may be formed in reinforcing layer to receive a heel filler block. The board 10 may be of cellulose or leather fibres, the layer 11 of open-weave muslin or scrim and the plastics reinforcing layer 12 of polypropylene.

Description

This invention relates to footwear and is more particularly concerned with insoles for footwear. In recent years the use of tack lasting to attach the shoe upper to the insole has been largely superseded by cement lasting, and the change has produced problems of delamination of insole materials which were satisfactory so long as tack lasting was employed.
According to this invention there is provided an insole comprising an upper layer of flexible board, a plastics reinforcing layer underlying the waist and heel seat portions of the upper layer, which reinforcing layer is bonded , to the underside of the upper layer, and a layer of fabric bonded to the underside of the reinforcing layer and to the underside of the board across the width of the latter just forward of the waist portions and of the forward edges of the reinforcing layer, the waist portions of the reinforcing layer adjacent the longitudinal centre line being thicker than the side edge portions of that layer.
Making the portions of the reinforcing layer adjacent the longitudinal centre line thicker than the side edge portions of that layer stiffens the waist part of the insole. For this purpose the underside of the reinforcing layer may be convexly curved, viewed in cross-section, but it is preferred to form a relatively wide - 2 41460 low ridge, along the longitudinal, ocntro lino, on the underside of the reinforcing layer.
The invention will now he described in more detail with reference by way of example to the accompanying diagrammatic drawings in whioh: Figure 1 shows the underneath face of an insole according to the invention, Figure 2 is a side view of the insole of Figure 1, Figure 3 is a sectional view on the plane 3-3 of Figure- 1, Figure 4 is a view corresponding to Figure 1 of a modified form of insole according to the invention, and Figure 5 ia a side view of part of the insolo of Figure 4· Referring to the drawings, the insole comprises a board 10 made from cellulose or leather fibres or other suitable material suoh as is sold for use as insole material, a layer of an open weave muslin or other thin sorim 11 extending rearwards from a point forward of the waist part of the insole, and a reinforcing layer 12 of a thermoplastic plastics material of suitable stiffness disposed between and bonded to the board 10 and layer 11. The board 10 extends the full length and width of the insole.
In manufacture of the insole, the forward edge portion 11a of the scrim 11 is secured by an adhesive to the underneath faoe of the board 10, and the resulting assembly is plaoed in a mould which closely surrounds the periphery of the part of the insole overlaid by the muslin, but whioh enables the muslin and the board 10 to be placed against opposite faces of the mould cavity. Polypropylene is then injected into the spaoe between the muslin and the board as indicated in Figure 3. If neoessary the surface of the muslin and/or the board are coated with a material which will ensure the bonding of the polypropylene to them. - 3 . The mould Is shaped to taper the thickness of the reinforoing layer of polypropylene at ito forward edge 12a, and to thicken the layer In the region of the longitudinal oentre line of the insole by forming it with a relatively wide but shallow ridge 13 on its underside.
This thiokening stiffens the waist portions of the insole against bending about a transverse axis. If desired, the upper surfaoe of the insole heel and reinforcing layer may be conoavely curved in the/seat region so that the insole conforms better to the shape of the heel of the wearer. seat Holes or recesses 14 may be moulded in the heel/and waist portions of the insole to looate a heel filler block, projections on the upper surfaoe of the blook being engaged in tho holes or reoesses. The holes hay also act as location points for backport moulding.
In a modified arrangement illustrated in Figures 4 mci 5i a reoess 15 is formed in the oonvexly ourved underneath surfaoe of the reinforcing layer to reoeive the heel filler blook 16. The forward end faoe of the recess may be undercut as shown at 17 to provide improved looation for the forward edge of the filler blook. The filler blook nay be rebated at 18 along the sides of its upper surfaoe to aooommodate the lasting margin of the upper. The lower surface of the reinforcing layer is, as before, covered overall by the scrim 11.

Claims (5)

1. An insole comprising an upper layer of flexible board, a plastics reinforcing layer underlying the waist and heel seat portions of the upper layer, which reinforcing layer 5 is bonded to the underside of the upper layer, and a layer of fabric bonded to the underside of the reinforcing layer and to the underside of the board across the width of the latter just forward of the waist portions and of the forward edges of the reinforcing layer, the waist portions of the 10 reinforcing layer adjacent the longitudinal centre line being thicker than the side edge portions of that layer.
2. An insole as claimed in claim 1, wherein the underside of the reinforcing layer is convexly curved viewed in crosssection transversely of the lengthwise dimension of the 15 insole.
3. An insole as claimed in claim 1, wherein a wide low ridge is formed, along the longitudinal centre line, on the underside of the reinforcing layer.
4. An insole substantially as hereinbefore described with 20 reference to and as illustrated in Figures 1 to 3 or in Figures 4 and 5 of the accompanying drawings.
5. A boot or shoe having the upper thereof secured to an insole as claimed in any one of claims 1 to 4.
IE136075A 1974-06-19 1975-06-17 Improvements in or relating to footwear IE41480B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2728474A GB1521682A (en) 1974-06-19 1974-06-19 Footwear

Publications (2)

Publication Number Publication Date
IE41480L IE41480L (en) 1975-12-19
IE41480B1 true IE41480B1 (en) 1980-01-16

Family

ID=10257084

Family Applications (1)

Application Number Title Priority Date Filing Date
IE136075A IE41480B1 (en) 1974-06-19 1975-06-17 Improvements in or relating to footwear

Country Status (2)

Country Link
GB (1) GB1521682A (en)
IE (1) IE41480B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439934A (en) * 1982-02-26 1984-04-03 Brown Dennis N Orthotic insert
USRE32698E (en) * 1982-02-26 1988-06-21 Northwest Podiatric Laboratories, Inc. Orthotic insert
US4612713A (en) * 1985-04-03 1986-09-23 Brown Dennis N Orthotic for athletic use
US4688338A (en) * 1985-04-03 1987-08-25 Northwest Podiatric Laboratories, Inc. Orthotic insert for high heeled shoes
US4930232A (en) * 1989-03-28 1990-06-05 The United States Shoe Corporation Multilayer shoe sole
GB2300795A (en) * 1995-05-13 1996-11-20 British United Shoe Machinery Insole
WO2018002835A1 (en) * 2016-06-28 2018-01-04 Myganox (Pty) Ltd Shankless insole for an item of footwear

Also Published As

Publication number Publication date
GB1521682A (en) 1978-08-16
IE41480L (en) 1975-12-19

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