Back to results
US 5,820,719 AGranted
Method for forming a sole having a heat activatable adhesive adhered to one side thereof for subsequent attachment to an upper
AssigneeWorthen Industries
InventorsBarbara A. Strickland, James H. Kerouack, Vitale Brinzow
Life of this patent
Estimating the term…
Abstract
A sole assembly is made by placing a release film, having a heat activatable adhesive on one side, in a mold and forming a sole in the mold. The adhesive forms an integral part of the completed sole which allows handling of the molded sole without displacing the adhesive or the release film. The molded sole is used by removing the release film, activating the adhesive and bonding the sole to an upper.
Claims3
A method for forming a molded sole said sole intended to be attached to an upper which comprises:
- placing a release film in a mold, the release film having heat activatable adhesive on one side thereof, the other side being free of adhesive;
- forming in said mold a sole, the adhesive adhering to one side of the sole;
- and
- removing from the mold a laminated sole assembly consisting of a release film, a heat activatable adhesive and a sole wherein the heat activatable adhesive forms an integral part of the sole.
1 more element
A method for attaching a molded sole to an upper which comprises:
- placing a release film in a mold, the release film having heat activatable adhesive on one side thereof, the other side being free of adhesive;
- forming in said mold a sole, the adhesive adhering to one side of the sole;
- migrating at least a portion of the adhesive into the sole whereby the adhesive is both absorbed in the sole and adsorbed on the surface of the sole;
- removing from the mold a laminated sole assembly consisting of a release film, a heat activatable adhesive and a sole wherein the heat activatable adhesive forms an integral part of the sole;
- removing the release liner;
- and
- attaching an upper to the sole by heat activating the adhesive.
4 more elements
Dependencies are inferred from the claim text.