Apparatus for forming brushes and the like

Claim 1

IN AN APPARATUS FOR INJECTION MOLDING OF BRUSHES, IN COMBINATION, A MOLD ASSEMBLY INCLUDING A PLURALITY OF ADJACENT DIE PLATES HAVING OPPOSITE SIDE FACES, FIRST END PORTIONS, AND SECOND END PORTIONS, ONE END PORTION AT EACH DIE PLATE HAVING AN END FACE EXTENDING BETWEEN THE RESPECTIVE SIDE FACES AND THE SIDE FACES OF ADJACENT DIE PLATES FORMING PAIRS OF SIDE FACES DEFINING BETWEEN THEMSELVES ELONGATED MOLD CAVITIES IN WHICH BRISTLES ARE FORMED AND CURED UPON INTRODUCTION OF MOLD MATERIAL, SAID ELONGATED MOLD CAVITIES EXTENDING FROM SAID END FACES TOWARD THE OTHER EDN PORTIONS OF SAID DIE PLATES AND EACH THEREOF HAVING A FIRST END AND A SPACED SECOND END, AND MEANS FOR CONNECTING SAID DIE PLATES IN THE REGION OF ONE END OF EACH OF SAID MOLD CAVITIES, SAID ELONGATED MOLD ASSEMBLY BEING ADAPTED TO ASSUME A CLOSED POSITION IN WHICH SAID PAIRS OF SAID FACES ARE IN ABUTMENT WITH EACH OTHER AND IN WHICH SAID ELONGATAED MOLD CAVITIES ARE CLOSED SUBSTANTIALLY FROM SAID FIRST END THEREOF TO SAID SECOND ENDS AND AN OPEN POSITION IN WHICH SAID PAIRS OF SIDE FACES ARE AT LEAST PARTLY SPACED FROM EACH OTHER IN A DIRECTION TRANSVERSE TO THE ELONGATION OF SAID ELONGATED MOLD CAVITIES, SAID MOLD ASSEMBLY NORMALLY ASSUMING ONE OF SAID POSITIONS AND BEING DEFORMABLE INTO THE OTHER OF SAID POSITIONS; BACKING MOLD MEANS ADJACENT TO BUT SPACED FROM SAID END FACES; SAID BACKING MOLD MEANS AND SAID END FACES DEFINING BETWEEN THEMSELVES A MOLD SPACE FOR RECEPTION OF MOLD MATERIAL FORMING THE BASE OF THE BRUSH AND SAID MOLD SPACE COMMUNICATING WITH SAID MOLD CAVITIES; AND MEANS FOR DEFORMING SAID MOLD ASSEMBLY INTO SAID OTHER POSITION WHENEVER REQUIRED, THE BRISTLES BEING FORMED AND CURED IN SAID MOLD CAVITIES WHEN THE MOLD ASSEMBLY ASSUMES SAID CLOSED POSITION AND THE BRISTLES BEING AT LEAST PARTLY SEPARATED FROM THE RESPECTIVE PAIRS OF SIDE FACES WHEN THE MOLD ASSEMBLY ASSUMES SAID OPEN POSITION.