Bearing for trolley roller supporting frame and method of making

Claim 1

A FRAME ASSEMBLY FOR SUPPORTING A ROLLER AXLE OF A TROLLEY AND THE LIKE WHICH COMPRISES A PAIR OF PLATES POSITIONED IN BACK-TO-BACK RELATIONSHIP, EACH PLATE HAVING AN ANNULAR FLANGE EXTENDING LATERALLY OUTWARDLY FROM THE PLATE AND DEFINING AN APERTURE THEREIN, SAID APERTURE OF ONE PLATE BEING IN AXIAL ALIGNMENT WITH SAID APERTURE OF THE OTHER PLATE, A PLASTIC BEARING SLEEVE RECEIVED IN THE APERTURES AND HAVING A THROUGH BORE DEFINING A BEARING SURFACE FOR ROTATABLY SUPPORTING THE ROLLER AXLE, THE SLEEVE INCLUDING ON ITS OUTER SURFACE INTERMEDIATE THE ENDS THEREOF A CIRCUMFERENTIALLY EXTENDING ANNULAR RIB ENGAGEABLY RECEIVED BETWEEN THE PLATES, AT LEAST ONE PROJECTION ON THE INNER SURFACE OF AT LEAST ONE PLATE AXIALLY DIRECTED PARALLEL TO THE BEARING SURFACE OF THE SLEEVE IN BITING ENGAGEMENT WITH ITS RIB, AND CLAMPING MEANS IN THE PLATES FORCING THE PLATES TOGETHER AND COMPRESSING THE MATERIAL OF THE RIB IN A DIRECTION PARALLEL TO THE BEARING SURFACE TO RIGIDLY FIX THE SLEEVE BETWEEN THE PLATES AGAINST RELATIVE MOVEMENT.