Lasting machine with latex adhesive delivery
AssigneeCompo Industries, Inc.
InventorsMartin Kaplan, Joseph V. Tassone
Life of this patent
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AssigneeCompo Industries, Inc.
InventorsMartin Kaplan, Joseph V. Tassone
Estimating the term…
The method of lasting footwear with liquid latex comprising depositing the latex in a wet, liquid, low-viscosity, nonadhesive form on the surface of the feed roll, of a pair of cooperating feed rolls of a progressive-type lasting machine, which normally has contact with the inner side of the lasting margin of the upper material at a place apart from the lasting margin, while the deposited latex is traveling from the place of deposit on the surface of the feed roll having contact with the inner side of the lasting margin to the place of contact with the lasting margin, spreading it uniformly thereon and rendering it partially coagulated and adhesive, transferring the partially coagulated adhesive latex to the lasting margin at the place of contact and, as the latex-coated surface of the lasting margin is released, pressing it against the latex-receptive surface of the insole, and apparatus for carrying out the method.
The method of adhesively attaching the lasting margin of an upper to the latex-receptive bottom of a shoe with latex comprising progressively and uninterruptedly stretching successive increments of the lasting margin perpendicular to the bottom with the aid of a pair of oppositely turning gripping and feeding rolls, one of which has contact with the inner side of the lasting margin and the other with the outside of the lasting margin and then releasing the pressing the margin into engagement with the bottom with the aid of wiping means, said method comprising continually delivering wet liquid latex onto the rotating surface of said one feed roll at a place substantially two-thirds of the way around from the place of stretching in the direction opposite to rotation for transfer from the place of delivery to the lasting margin at the place of stretching, directing a jet of air toward the surface of said one feed roll at a place substantially one-quarter way around from the place of stretching in the direction opposite to rotation at a pressure such as to assist in spreading the liquid latex on the surface uniformly and at a temperature such as to cause it to partially coagulate and become adhesive and, at the place of stretching, pressing the partially coagulated adhesive layer of latex in engagement with the lasting margin, said method including continuously presenting uncoated areas of the lasting margin to the place of stretching, continuously supplying fresh portions of partially coagulated adhesive latex to said incremental uncoated areas as they are advanced to said place of stretching, releasing the uncoated margin and pressing the coated margin into engagement with the latex-receptive surface of the bottom.
Lasting apparatus for lasting footwear with latex comprising a pair of oppositely turning work gripping and feeding rolls of oppositely tapering frustoconical configuration supported for rotation about spaced parallel axes with their frustoconical surface spaced for receiving between them the lasting margin of a shoe upper, said gripping and feeding rolls being arranged so that one of the rolls has a downwardly divergent frustoconical surface for engagement with the inner side of the lasting margin and fixed and rotating wipers at the delivery side of the gripping and feeding rolls for folding the lasting margin downwardly as it is released from the gripping and feeding rolls and for pushing the folded margin inwardly parallel to the surface of the bottom, nozzle means for gravitationally delivering wet, nontacky, nonadhesive liquid latex onto the surface of said one feed roll at a place substantially two-thirds of the way around from the place of engagement of said one feed roll, with the inner side of the lasting margin, and means for spreading and rendering said wet liquid latex partially coagulated and adhesive before it reaches said place of engagement.
Dependencies are inferred from the claim text.