Abstract: A paper sensing apparatus of an office machine has a sensor actuator disposed to pivot with respect to a pivot center of a conveying roller by a printing paper when the printing paper is conveyed, and a sensing unit generating a paper sensing signal in accordance with a rotation of the sensor actuator. Accordingly, the paper sensing apparatus is capable of accurately sensing a leading end of the printing paper, and thus a top margin of the printing paper can be effectively controlled as the paper sensing apparatus is installed to be operated with respect to a rotation center of the conveying roller so that an error generated during sensing a paper top position due to a lengthened distance between the conveying roller and a transferring roller can be reduced.

Abstract: A media holding apparatus includes a tray having a support surface configured to receive media and a media stop carried by the tray. The media stop is movably supported for continuously adjustable positioning relative to the tray to conform dimensionally with media received in the tray. The apparatus also includes a position-detecting sensor associated with the tray and the media stop which is operative to generate a unique electrical pattern corresponding with a detected position of the media stop relative to the tray. The unique electrical pattern is indicative of the size of the media detected in the tray. A method is also provided.