Elongate hinge having centering means

Claim 1

IN A HINGE, A FIRST METAL MEMBER HAVING AN INTEGRAL HINGE SOCKET WITH AN OPEN ENDED ARCUATE SURFACE OF MORE THAN 180* AND HAVING A SLOT EXTENDING THE LENGTH OF THE MEMBER AND CONNECTING TO BOTH OF THE MARGINS OF THE ARCUATE SURFACE OF THE HINGE SOCKET SO THAT THE CIRCUMFERENTIAL EXTENT OF SAID SLOT DETERMINES THE ARCUAT SURFACE LENGTH OF SAID HINGE SOCKET, A SECOND METAL MEMBER HAVING AN INTEGRAL PINTLE THEREON AND EXTENDING AT LEAST SUBSTANTIALLY THE LENGTH THEREOF, SAID SECOND METAL MEMBER HAVING A FLANGE CONNECTING SAID PINTLE TO THE REMAINDER THEREOF, A HOLLOW CYLINDRICAL LOW FRICTION PLASTIC BEARING OF AT LEAST SUBSTANTIALLY THE SAME LENGTH AS SAID METAL MEMBERS CARRIED BY SAID PINTLE AND ENGAGING SAID HINGE PINTLE AND SAID HINGE SOCKET TO CONNECT AND SECURE SAID SECOND METAL MEMBER TO SAID FIRST METAL MEMBER FOR RELATIVE PIVOTAL MOVEMENT THEREBETWEEN, SAID BEARING HAVING A SLOT THEREIN THROUGH WHICH SAID FLANGE EXTENDS, SAID PINTLE HAVING END EXTENSIONS THEREON THAT EXTEND AXIALLY BEYOND ADJACENT PORTIONS OF SAID FLANGE, AND A PLASTIC BEARING PLUG SECURED IN SAID HINGE SOCKET AT EACH END THEREOF TO RETAIN SAID MEMBERS IN ASSEMBLED HINGED ENGAGEMENT, SAID BEARING PLUGS EACH HAVING A CENTER RECESS EXTENDING THEREINTO IN THE ADJACENT ENDS THEREOF AND RECEIVING SAID END EXTENSIONS TO AID IN PIVOTALLY POSITIONING SAID SECOND METAL MEMBER.