Patent ID: 8033628
Filing Date: 2011-10-11
Classification: B41J

Abstract:
1. A method of identifying a type of recording medium, the recording medium comprising information marks including a reference mark and an identification mark, a relationship of the identification mark and the reference mark being indicative of the type of recording medium, the method comprising: moving the recording medium relative to a sensor at a substantially uniform speed; processing a signal from the sensor to provide digitized data of the signal; identifying a plurality of peaks in the digitized data; determining at least one of the heights and widths of each of the plurality of peaks; determining a peak to peak distance between two adjacent peaks of the plurality of peaks; identifying a peak corresponding to the reference mark using a ratio of peak heights of the adjacent peaks; determining a configuration of a peak corresponding to the identification mark by locating a peak that is spaced apart from the position of the peak corresponding to the reference mark; and identifying the type of recording medium using the configuration of the peak corresponding to the identification mark.