Patent ID: 8585046

Claim:
A stacker tray assembly, comprising: a vertically movable elevator stacker tray, at least one sensor attached to an end portion of the elevator stacker tray, and a continuously variable slanted shape marker in sensing contact with the at least one sensor, the continuously variable slanted shape marker comprising a plurality of measurables over substantially an entire height of the continuously variable slanted shape marker, wherein the at least one sensor is configured to indicate a vertical position of the elevator stacker tray by vertically sensing at least one of the plurality of measurables of the continuously variable slanted shape marker, a size of the at least one sensor is substantially shorter in a vertical direction than a length that the movable elevator stacker tray travels, and the plurality of measurables consist of one of a plurality of horizontal width lines and a plurality of pixels, the plurality of measurables decreasing in measurement as they proceed vertically up the continuously variable slanted shape marker.