A capping system has a cap for capping an ink jet print head, and a supporting structure for mechanically engaging and disengaging the cap with the ink jet print head. The cap has a vent. When the supporting structure engages the cap with the ink jet print head, the cap covers the ink jet print head...http://www.google.com/patents/US20020080206?utm_source=gb-gplus-sharePatent US20020080206 - INK JET CAP WITH VENT
