Patent ID: 7869047
Filing Date: 2011-01-11
Classification: G03G

Abstract:
1. An optical sensor assembly that measures optical reflection density on a printed sheet horizontally conveyed and supported by a paper transport section of a printer, comprising: a densitometer including a frame having an engagement portion that engages said moving printed sheet, a light source mounted on said frame that illuminates a portion of said printed sheet at a continuous intensity, and a photo-detector mounted on said frame and positioned to receive light from said light source that is reflected off said printed sheet, and a mounting that floatably mounts said densitometer in said printer such that said engagement portion of said frame engages said printed sheet in constant sliding contact as it moves through said paper transport section as a result of the weight of the densitometer, wherein a constant, predetermined distance is maintained between said photo-detector and said illuminated portion of said moving printed sheet regardless of vertical movement of said printed sheet within said paper transport section as a result of said sliding contact.