Patent ID: 8517376
Filing Date: 2013-08-27
Classification: B65H,G03G

Abstract:
1. A sheet media size determining apparatus, comprising: a tray having a support surface to receive print media; at least one side guide in contact with at least one edge of the print media, the at least one side guide being movably supported to conform dimensionally with the print media received in the tray; an encoder mounted in a slot on a side of the tray and connected through a linkage mechanism to the at least one side guide, movement of the at least one side guide causing the encoder to be linearly displaced in a direction along the slot in the side of the tray; and a sensor mounted in an image forming device in which the tray is inserted and external to the tray that senses an amount that the encoder is linearly displaced with respect to the side of the tray when the tray is inserted in the image forming device to generate a unique electrical pattern corresponding to a position of the at least one side guide relative to the tray based on the sensed amount that the encoder is linearly displaced along the side of the tray; wherein the unique electrical pattern is indicative of the size of the print media received in the tray.