Patent ID: 6705609
Filing Date: 2004-03-16
Classification: B65H

Abstract:
An apparatus for sensing the feeding of individual sheets of paper which is adapted for use with a sheet feeding apparatus including a plurality of pairs of a driving roller and a driven roller which continuously feed a plurality sheets of paper one by one along a predetermined paper traveling path, the apparatus for sensing the feeding of individual sheets of paper comprising:a support plate mounted between and adapted to support a sheet of paper passing between the driving roller and driven roller of each of the plurality of pairs of a driving roller and a driven roller along the predetermined paper traveling path, the support plate having a plurality of driving roller through-holes formed thereon which allows the plurality of pairs of a driving roller and a driven roller to contact each other therethough; a rotating shaft rotatably mounted over the top surface of the support plate, parallel to the support plate; an extending contact arm fixedly mounted on the rotating shaft with one end portion thereof extending toward the support plate to contact the top surface of the support plate, the extending contact arm being moved upward from the top surface of the support plate by a height corresponding to the thickness of the sheet of paper when the sheet of paper passes along the support plate thus causing the rotating shaft to rotate; an amplifying section operatively coupled to the rotating shaft to amplify an amount of rotation of the rotating shaft; and a sensor operatively coupled to the amplifying section for sensing the amount of rotation amplified by the amplifying section, wherein the feeding of two or more overlapping sheets of paper between the pairs of a driving roller and a driven roller is detected.