A storage vessel detecting mechanism is used for detecting an error condition of a storage vessel, which is detachably fitted in a main apparatus. The vessel is movably fitted in the main apparatus, and one end of a movable member, which is pivoted, is engaged with the vessel. The other end of the movable...http://www.google.de/patents/US5101228?utm_source=gb-gplus-sharePatent US5101228 - Storage vessel detecting mechanism
