A sheet feeding apparatus in which vibration members of the running track type to form travelling waves are arranged in the vertical direction so as to face each other and a sheet sandwiched between them is fed by frictional forces is disclosed. In order to reduce the number of parts of a circuit to...http://www.google.com.au/patents/US5348287?utm_source=gb-gplus-sharePatent US5348287 - Sheet feeding apparatus using a vibration wave to convey sheets
