An ink jet recording apparatus for forming a record by discharging ink from a recording head onto a recording material, has a tube pump for ink discharge recovery, by suction or pressurization, through deformation, with pressure rollers, of plural tubes communicating with discharge openings of the recording...http://www.google.de/patents/US5486854?utm_source=gb-gplus-sharePatent US5486854 - Ink jet recording apparatus
