Apparatus for the injection molding of articles made of plastic, especially footwear

Claim 1

APPARATUS FOR INJECTION MOLDING COMPRISING A FORM HAVING SIDES AND A BOTTOM CORRESPONDING IN SHAPE TO THE SHOE TO BE MADE, SIDE MOLD PARTS MOVABLE ABOUT THE SIDES OF THE FORM TO FORM, IN CONJUNCTION WITH THE SIDES, A CAVITY, THE THICKNESS OF WHICH CORRESPONDS TO THE THICKNESS OF THE UPER OF THE SHOE TO BE MADE, BOTTOM MOLD PARTS ALTERNATELY MOVABLE INTO A POSITION OPPOSITE THE BOTTOM OF THE FORM TO FORM, IN CONJUNCTION WITH THE BOTTOM, A CAVITY AT THE BOTTOM WHICH IS IN COMMUNICATION WITH THE CAVITY AT THE SIDE, ONE OF SAID BOTTOM MOLD PARTS FORMING A CAVITY BETWEEN IT AND THE BOTTOM OF THE FORM OF PREDETEMINED DEPTH AND THE OTHER A GREATHER DEPTH, MEANS SUPPORTING THE BOTTOM MOLD PARTS FOR LINEAR AND PIVOTAL MOVEMENT REALTIVE TO THE SIDE MOLD PARTS, POWDER-OPERABLE MEANS CONNECTED TO THE LAST-NAMED MEANS OPERATIVE TO EFFECT LINEAR MOVEMENT, ON THE ONE HAND TO HOLD A BOTTOM PART ENGAGED WITH THE SIDE PARTS OPPOSITE THE BOTTOM OF THE FORM AND ON THE OTHER HAND TO HOLD IT DISENGAGED THEREFROM, AND OTHER POWER-OPERABLE MEANS CONNECTED TO THE BOTTOM PARTS OPERABLE TO EFFECT PIVOTAL MOVEMENT OF THE BOTTOM PARTS, WHEN THEY ARE DISENGAGED FROM THE SIDE PARTS, TO MOVE ONE OR THE OTHER ITO OPERATIVE POSITION OPPOSITE THE BOTTOM OF THE FORM.