Patent ID: 8123213

Claim:
A sheet size detection device for detecting a size of sheets which are held in a sheet tray, comprising: a first guide member for defining a position of the sheets in a first direction of said sheets, the first guide member being movable in accordance with a first dimension of the sheets; a second guide member for defining a position of the sheets in a second direction of the sheets, the second direction being orthogonal to the first direction, the second guide member being movable in accordance with a second dimension of the sheets; a first bracket operatively connected to the first guide member, the first bracket having a substantially smooth outer surface and including a plurality of slots of non-uniform length extending therethrough in a parallel manner, wherein each of the plurality of slots has a length greater than a height associated therewith; a second bracket operatively connected to the second guide member, the second bracket having a substantially smooth outer surface and slidably engaging the first bracket and including a plurality of slots of non-uniform length extending therethrough in a parallel manner, wherein each of the plurality of slots has a length greater than a height associated therewith; and a plurality of switches configured for selective engagement by at least one of the first bracket and the second bracket, wherein the solid surface and the plurality of slots of the first bracket, and the solid surface and the plurality of slots of the second bracket are configured to interact with one another to selectively engage the plurality of switches, and wherein the selective engagement of the plurality of switches enables conveyance of two dimensions of the sheet size.