Apparatus for extruding curbing over anchoring pins

Claim 1

IN A CURB FORMING APPARATUS HAVING A SUPPORTING FRAME, GROUND ENGAGING WHEELS ON SAID FRAME, ROTARY DRIVE MEANS ON SAID FRAME, A HOPPER HAVING A DISCHARGE OPENING AT THE BOTTOM THEREOF DISPOSED IN SAID FRAME, AND A SCREW HOUSING MOUNTED ON SAID FRAME; A COMPACTION SCREW IN SAID SCREW HOUSING, AND MECHANICAL DRIVING MEANS FOR CONNECTING SAID COMPACTING SCREW WITH SAID ROTARY DRIVE MEANS, A COMPACTION CHAMBER ATTACHED TO AND COMMUNICATING WITH SAID SCREW HOUSING, A CURB FORM ATTACHED TO AND COMMUNICATING WITH SAID COMPACTION CHAMBER, SAID COMPACTION CHAMBER HAVING A FIRST PORTION POSITIONED HORIZONTALLY WITH ITS AXIAL CENTER LINE LYING ON THE AXIS OF SAID COMPACTION SCREW AND A SECOND ANGULARLY DISPOSED PORTION JOINED THERETO AT AN ANGLE OF APPROXIMATELY 62* THEREFROM FOR DELIVERING MATERIAL BEING COMPACTED THEREINTO A LOCATION OFF CENTER WITH RESPECT TO THE AXIAL LINE OF SAID SCREW HOUSING AND COMPACTION SCREW, SAID COMPACTION CHAMBER HAVING ON OPENING IN THE ANGULARLY DISPOSED POSITION THEREOF AND A MOVABLE CLOSURE NORMALLY CLOSING SAID OPENING.