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PAPER LEVEL INDICATOR Disclosure Number: IPCOM000025338D
Original Publication Date: 1984-Oct-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal


In an electrophotographic printing machine, it is frequently desirable for the machine operator to have a display of the amount of copy sheets remaining in the printing machine for use. Furthermore, it is desirable for the operator to know when the tray supporting the copy sheets is in an inoperative position permitting additional copy sheets to be loaded therein. As shown in the drawing, when the copy sheet tray is in its lowermost position and the slide drawer supporting the tray unlocked, the green stripe on drum 12 is in alignment with the window in the outside cover and locked in place. When an elevator system moves the tray in an upperwardly direction to a feed position arm 14, attached thereto, moves upwardly and pulls cable 16 in an upwardly direction to rotate drum 12. Stripe 18 will then be visible through the window to indicate the level of the copy sheets. As the tray continues to rise in order to maintain the uppermost copy sheet in contact with the stationary sheet feeder, cable 16 moves therewith so as to rotate drum 12 and helical stripe 18 thereon. The helical stripe provides a continuous indication, in the window, of the amount of copy sheets remaining on the tray.