Method of manufacture of a shoe, a mold for carrying out said method and a shoe thus produced

A method of manufacture of a shoe in which an upper and a sole are provided with a layer of plastic overmolded on an inner slipper made of leather or like material of any suitable type, a metal packing former being placed within said inner slipper during the overmolding operation, wherein said method comprises the following steps:

• fabrication of two high-upper slippers, each comprising an upper and a sole, of leather or like material of any suitable type, one of said slippers being of larger size than the other at all points and provided in the sole of said slipper with an orifice for the injection of plastic;
• engagement of the slipper of smaller size within the slipper of larger size so as to have an inner and an outer slipper, wherein, spacer members are placed between the soles of the two slippers for the purpose of maintaining said soles in spaced relation to each other especially in proximity to the injection orifice provided in the sole of the outer shoe for admission of the injected plastic, positioning of a metal former within the inner slipper so as to have a completed assembly, placing the complete assembly within a mold comprising a bottom mold block corresponding to the sole and provided with a sprue for injection of plastic, the opening of said sprue being located opposite to the injection orifice of the sole of said outer slipper;
• injection of plastic through the sprue, with the result that the injected plastic spreads within an internal space between the two soles and the two uppers of the two slippers and that the different parts of the finished shoe are constituted by the combination of two layers of leather or like material of any suitable type between which is enclosed a layer of plastic, and wherein provision is made in at least a portion of the sole of the outer slipper for at least one hole through which the plastic is permitted to flow beneath said sole during the injection operation in order to form at least part of an outsole of the shoe, a corresponding internal molding space or cavity being provided in the block which closes a respective end of the mold.

A method of manufacture of a shoe in which an upper and a sole are provided with a layer of plastic overmolded on an inner slipper made of leather or like material of any suitable type, a metal packing former being placed within said inner slipper during the overmolding operation, wherein said method comprises the following steps:

• fabrication of two high-upper slippers, each comprising an upper and a sole, of leather or like material of any suitable type, one of said slippers being of larger size than the other at all points and provided in the sole of said slipper with an orifice for the injection of plastic;
• engagement of the slipper of smaller size within the slipper of larger size so as to have an inner and an outer slipper, wherein spacer members are placed between the soles of the two slippers for the purpose of maintaining said soles in spaced relation to each other especially in proximity to the injection orifice provided in the sole of the outer shoe for admission of the injected plastic, positioning of a metal former within the inner slipper so as to have a completed assembly, placing the completed assembly within a mold comprising a bottom mold block corresponding to the sole and provided with a sprue for injection of plastic, the opening of said sprue being located opposite to the injection orifice of the sole of said outer slipper;
• injection of plastic through the sprue, with the result that the injected plastic spreads within an internal space between the two soles and the two uppers of the two slippers and that the different parts of the finished shoe are constituted by the combination of two layers of leather or like material of any suitable type between which is enclosed a layer of plastic, and wherein, holes are provided over the entire surface of the sole of the outer slipper and prior to positioning of the two slippers, an outsole previously fabricated from plastic of the same type as the plastic to be injected in a subsequent operation is placed against the mold block which closes the corresponding end of the mold so that, at the time of said subsequent molding operation, the plastic which flows through the holes formed in the sole of the outer slipper coalesces and is thus made integral with the plastic of said outsole.