Card tray with adjustable follower

Claim 1

A FILING TRAY, AND AT LEAST ONE FOLLOWER ADJUSTABLY MOUNTED IN SAID TRAY; SAID TRAY HAVING A BASE PLATE AND A PAIR OF GENERALLY UPRIGHT, PARALLEL SIDE WALLS; EACH OF SAID SIDE WALLS HAVING A LONGITUDINALLY EXTENDING, DOWNWARDLY TURNED FLANGE ON THE UPPER EDGE THEREOF DEFINING A DOWNWARDLY OPEN CHANNEL; SAID FOLLOWER BEING UNITARY AND COMPRISING A GENERALLY RIGID BACK PLATE; A CAM AT EACH END OF SAID BACK PLATE; SAID CAMS BEING PARALLEL AND SPACED APART A DISTANCE EQUAL TO THE DISTANCE BETWEEN SAID CHANNELS AND BEING DISPOSED IN SAID CHANNELS AND SLIDEABLE IN SAID CHANNELS, LONGITUDINALLY THEREOF, WITH SAID BACK PLATE EXTENDING TRANSVERSELY OF THE TRAY; EACH OF SAID CAMS BEING OVOID AND HAVING AN ENTIRELY CURVILINEAR EDGE WITH A MINOR WIDTH OF THE CAM BEING GREATER THAN THE SPACING BETWEEN SAID BASE PLATE AND THE ADJACENT OR LOWER EDGE OF THE CORRESPONDING SAID FLANGE, AND SLIGHTLY LESS THAN THE SPACING BETWEEN SAID BASE PLATE AND THE ROOT OF SAID CHANNELS, WHEREBY SAID CAMS ARE FREE TO SLIDE LONGITUDINALLY WHEN SAID FOLLOWER IS DISPOSED IN ONE POSITION RELATIVE TO THE TRAY WHILE STILL BEING RETAINED IN SAID CHANNELS; THE MAJOR WIDTH OF SAID CAMS HAVING ONLY VERY SMALL EXCESS DIMENSION OVER SAID MINOR WIDTH AND BEING ONLY SLIGHTLY GREATER THAN THE SPACING BETWEEN SAID BASE PLATE AND THE ROOT OF SAID CHANNELS, WHEREBY SAID CAMS ARE IN FRICTIONALLY JAMMED POSITION BETWEEN SAID BASE PLATE AND SAID FLANGES WHEN THE MAJOR WIDTH THEREOF IS MANUALLY FORCED BETWEEN THE BASE PLATE AND SAID FLANGES DEFINING SAID CHANNELS, SAID BACK PLATE BEING DISPOSED ON CHORDS OF SAID CAMS WHICH ARE SUBSTANTIALLY PARALLEL TO THE AXES THROUGH SAID MAJOR WIDTH AND HAVING A STOP EDGE EXTENDING RADIALLY BEYOND SAID CAMS, SAID STOP EDGE ENGAGING SAID BASE PLATE WHEN THE BACK PLATE IS IN NEAR UPRIGHT POSITION AND THE CAMS ARE IN SAID FRICTIONALLY JAMMED POSITION TO DEFINE A LOCKED POSITION OF THE FOLLOWER; THE LEADING PORTIONS OF SAID CAMS ON ONE SIDE OF SAID BACK PLATE BEING SUBSTANTIALLY LARGER THAN THE TRAILING PORTIONS ON THE OTHER SIDE OF SAID BACK PLATE, AND THE BACK PLATE, INCLUDING SAID STOP EDGE, BEING THEREBY OFFSET FROM SAID MAJOR WIDTH FOR IMPROVED STABILITY OF THE FOLLOWER IN THE LOCKED POSITION THEREOF.