Microprocessor-controlled apparatus for detecting and...

Details Microprocessor-controlled apparatus for detecting and... Microprocessor-controlled apparatus for detecting and...

B - Operations, Transporting

41

B

341/47

B41B 27/10 (2006.01) B41F 13/02 (2006.01) B65H 23/02 (2006.01) B65H 23/032 (2006.01) G01D 5/34 (2006.01)

Patent

CA 2012584

MICROPROCESSOR-CONTROLLED APPARATUS FOR DETECTING AND GUIDING A WEB WHEREIN RIGHT AND LEFT EYESPOTS ARE FORMED TO DETERMINE RIGHT AND LEFT EDGES ABSTRACT An apparatus for detecting and guiding a web includes a web scanner bar unit that extends across the entire width of the web path for controlling a steering mecha- nism to maintain a more precise edge and/or center alignment. The web scanner bar unit is formed of an infrared light-emitting diode array and a phototransistor array formed on opposite sides of the web. A micro- processor-based controller unit is provided for control- ling the operation of the web scanner bar unit to form right and left eyespots in order to determine the respec- tive right and left edges of the web. Further, the web scanner bar unit is capable of detecting a break in the intermediate area of the web.

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