Flexible insole rib for welting

a welting and welting technology, applied in the field of welting welting ribs, can solve the problems of crimping, bumping or puckering, loss of flexibility, general discomfort of shoes, etc., and achieve the effect of intrinsic flexibility of the rib

Inactive Publication Date: 2005-12-22
WORTHEN INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] An insole of a shoe including a rib with a filler having serrations along at least one side thereof to provide intrinsic flexibility to the rib. The filler board may be cellulosic in nature. Additionally the rib incorporates a patented twill fabric such as that disclosed in U.S. Pat. No. 5,195,255 assigned to Worthen Industries, to give further stretch as the serrated rib rounds the sharp corners of the insole, thereby providing even more flexibility to the system.

Problems solved by technology

The turns result in crimps, bumps or puckers-all of which are objectionable.
Attaching the rib to the insole board causes a loss of flexibility; further, stitching of the welt to the rib and sole-attaching, compounds this inflexibility to the point of making these shoes generally uncomfortable.
In the past there have been only a few methods to bring back the inherent flexibility of the insole board, all of which contribute to other problems: Use of a thinner, more flexible insole often causes tears during stitching and sole attaching; use of a lighter more flexible rib often results in stitching tears and irregularities; use of more flexible, lighter soling materials decreases the longevity of the shoe.
Also, an unfilled rib has been used in Asia for the same purpose, but doesn't have the intrinsic strength, especially in the higher walled ribs.

Method used

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  • Flexible insole rib for welting
  • Flexible insole rib for welting

Examples

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Embodiment Construction

[0012] Referring to FIG. 1, is a ribbed insole 10 comprising an insole 12 and an insole rib 14. The fabric formed around the rib and the rib must lie flat on the contour of the sole. It is adhered to the inside using conventional techniques.

[0013] As shown in FIG. 2, the rib 14 is formed by using a serrated cellulosic filler board and a twill fabric covering having a back side 16 and a front side 18. The serrations 20 in the rib filler are cut approximately 50-99% through the standing portion, which may be 7 / 32″ or 9 / 32″, depending upon the footwear manufacturer's preference. The higher rib ( 9 / 32″) is typically used for the manufacture of steel toe or safety shoes. During the manufacturing process, the top of the rib is trimmed off. This exposes the serrated cellulosic material allowing for flexing of the insole. Once the rib 14 has been trimmed prior to sole-attaching as seen in FIG. 3, the top of the standing rib is trimmed off so that the serrations 20 are opened sufficiently t...

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Abstract

An insole rib comprising a rib and a fabric. The rib has serrations along an upper edge thereof. A material surrounds a portion of the rib such that the upper serrated edge of the rib is exposed.

Description

PRIORITY INFORMATION: [0001] This application claims priority to United States Provisional Application Ser. No. 60 / 581,951 filed on Jun. 22, 2004, which is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION [0002] The traditional method for manufacturing high quality walking shoes includes the use of a stitched welt. The method utilizes an insole to which a rib or wall has been attached by adhesive and positioned approximately 5 / 32″ to 7 / 32″ from the edge of the insole. The upper and the lining, if a lining is present, is lasted to the insole edge and often to the rib itself. A welt, which may include leather, PVC, rubber, or other suitable materials, is sewn through the upper and lining to the wall of the rib. The top of the rib and any extra upper / lining materials are trimmed before sole-attaching by means of a temporary adhesive bond which is then stitched. [0003] A variety of insole ribs are available. Basically, each of these consists of a fiber core c...

Claims

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Application Information

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IPC IPC(8): A43B9/06A43B13/00A43B13/14
CPCA43B13/141A43B9/06
InventorSAMPSON, ROBERT W.
OwnerWORTHEN INDS