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US 4,170,802 AGranted
Method of manufacturing footwear
OwnerNorman A. Royinventor
Life of this patent
Estimating the term…
Abstract
There is provided a method of manufacturing a footwear item in which the molded outsole can be firmly affixed to the combination of an upper and an insole. A piece of prime rib tape is bonded to the underside of the insole, placed further inwardly from the edge than is the case in the Goodyear Welt construction, and stitched. The lower free edge of the upper is then stitched to the rib, roughened, and impregnated with bonding cement. Following this the outsole is molded against the underside of the insole so that the outsole contacts and bonds to the roughened region of the upper.
Claims9
A method of manufacturing a footwear item, comprising the steps:
- assembling an upper having a lower free edge with portions corresponding to the toe, the heel, and the inside and outside edges,
- providing an insole having an underside and a top side,
- bonding to the underside of the insole a length of prime rib tape which defines a rib, and margins on either side of the rib;
- the tape following the edge of the insole at least around the toe end and along both sides to the heel, and being set so that the rib is positioned at least about 3/8" in from the insole edge,
- stitching the tape in place along both margins thereof,
- stitching said lower free edge to the rib,
- roughening the lower free edge of the upper to allow cement to be impregnated thereinto,
- applying cement to at least the roughened region,
- and molding an outsole against the underside of the insole so that the outsole contacts and bonds to the roughened region of the upper, whereby the upper is secured to the outsole by direct bonding while simultaneously being retained by stitching to said tape.
6 more elements
Dependencies are inferred from the claim text.