Paper supply tray

Claim 1

A PAPER SUPPLY TRAY INCLUDING: A BASE MEANS IN THE FORM OF A TRAY FOR A STACK OF PAPER, SAID BASE MEANS HAVING A SLOT EXTENDING LONGITUDINALLY THEREOF, A BACK GUIDE MEMBER EXTENDING LATERALLY ACROSS SAID BASE MEANS AND MOVABLY POSITIONED ON SAID BASE MEANS AND GUIDED IN SAID SLOT FOR LONGITUDINAL MOVEMENT ON SAID BASE MEANS, SAID BACK GUIDE MEMBER HAVING A BACK GUIDE PLATE ADAPTED TO PARTLY SUPPORT THE REAR MARGIN OF A STACK OF PAPER, MARGIN GUIDES, A LATERALLY EXTENDING MEMBER CARRIED BY SAID BACK GUIDE MEMBER ADAPTED TO MOVABLY SUPPORT SAID MARGIN GUIDES, EACH OF SAID MARGIN GUIDES INCLUDING AN UPRIGHT SIDE LEG ADAPTED TO GUIDE THE SIDE MARGINS OF A STACK OF PAPER, AN UPRIGHT BACK LEG TO GUIDE THE BACK EDGE OF A STACK, AND A LATERAL EXTENDING LEG ADAPTED TO SUPPORT PART OF A STACK OF PAPER; FRICTION PADS MOUNTED ON SAID UPRIGHT LEGS OF SAID MARGIN GUIDES TO YIELDINGLY HOLD THE SIDE MARGINS OF A STACK OF PAPER PLACED ON SAID BASE MEANS, A DRAG ROLLER PIVOTABLY MOUNTED ON SAID LATERALLY EXTENDING MEMBER AND ADAPTED TO REST ON A STACK OF PAPER SO THAT AS THE TRAILING EDGE OF THE TOP MOST SHEET IN THE STACK OF PAPER IS ADVANCED ONLY A SHORT DISTANCE FROM UNDER SAID DRAG ROLLER, SAID DRAG ROLLER WILL BE IMMEDIATELY EFFECTIVE TO PLACE TO A DRAG RESISTANCE ON THE NEXT SHEET IN THE STACK TO PREVENT ITS ADVANCE TO ANY UNDESIRABLE DEGREE BY FRICTION FROM THE TOP MOST ADVANCING SHEET, AND LATCH MEANS CONNECTED TO SAID BACK GUIDE MEMBER ADAPTED TO RELEASABLY LOCK SAID BACK GUIDE MEMBER IN ADJUSTABLE POSITION ON SAID BASE MEANS.