A printer has a temperature sensor for detecting its internal temperature. When a print head is covered with a cap of a cap unit, a machine temperature T1 is stored in a controller. After a lapse of a predetermined time, a machine temperature T2 is measured. If a predetermined temperature difference...http://www.google.de/patents/US6042215?utm_source=gb-gplus-sharePatent US6042215 - Capping device and printer including the same
