Konica Minolta magicolor 1690MF Service Manual - Page 113
Document separation mechanism
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Auto Document Feeder Unit 4. Mechanical operations Theory of Operation Ver. 1.0 Nov. 2008 4.1.1 Document separation mechanism • Double feeding of paper is prevented using coefficient of friction between the media feed roller and separator pad. Media feed roller COMPOSITION/ OPERATION Separator pad A0HFT2C509AA Single sheet feeding : The coefficient of friction on the front side of the paper fed between the media feed roller and separator pad is equal to that on the backside of the paper. This allows the media feed roller to transport the paper. Multiple sheet feeding : The coefficient of friction between the paper and separator pad is greater than that between sheets of paper. This allows only the first sheet of paper to be transported by the media feed roller. Single sheet feeding Multiple sheet feeding 1382M009AA 6