Drawer back bearing

Claim 1

A SLIDING DRAWER COMPRISING: A VERTICAL FRONT, REAR AND SIDE WALLS; A HORIZONTAL BOTTOM WALL JOINED TO SAID FRONT AND REAR WALLS; AN ELONGATED GUIDE MEMBER DISPOSED BENEATH SAID BOTTOM WALL AND EXTENDING BETWEEN SAID FRONT AND REAR WALLS TO DEFINE GUIDE SURFACES FOR SLIDABLY ENGAGING A FIXED GUIDE ON A PIECE OF FURNITURE; A TONGUE PROJECTING REARWARDLY FROM THE REAR END OF SAID GUIDE MEMBER; A BACK BEARING DISPOSED ADJACENT THE REAR END OF SAID GUIDE MEMBER AND IN ENGAGEMENT WITH THE REAR SURFACE OF SAID REAR WALL, SAID BACK BEARING HAVING A DEPENDING PORTION HAVING ANTI-FRICTION SURFACES ADJACENT THE REAR END OF SAID GUIDE MEMBER FOR ENGAGEMENT WITH THE FIXED GUIDE, SAID BACK BEARING FURTHER HAVING A CAVITY THEREIN, THE WALLS OF WHICH TIGHTLY ENGAGE SAID TONGUE TO ACCURATELY POSITION SAID BACK BEARING ON SAID REAR WALL IN A PREDETERMINED LOCATION WITH RESPECT TO SAID ELONGATED GUIDE MEMBER.