Abstract: A carriage (22.28) is slidably mounted on a pair of shafts (22.20,22.22) and moves between protracted and retracted positions. A pusher element (22.32) extends downwardly from the the carriage and has a free distal end portion (22.34) attached to a rod (22.36) of a pneumatic cylinder (22.38) which extends in a direction parallel to the longitudinal axes of the shafts. A print head support body (22.44) is pivotably attached to the pusher element adjacent the distal end portion (22.34) and has a pair of followers (22.50) extending laterally from the support body and which are received in track means (22.14) formed in side walls (22.12). The print head support body assumes a first angular orientation at a printing station (22.52) when the carriage is in the protracted position and a second, different angular orientation at an ink replenishing station (22.54) when the carriage is in the retracted position. The track has a path portion (22.

Abstract: First and second tubes (16, 18) extend between first and second housings (12, 14). A magnet assembly (52) is slidably received in the first tube (16) which is formed of non-magnetic material. A timing belt (38) is attached to one side of the magnet assembly (52) and extends through tube (16) to the first housing (12) around timing pulleys (24, 26) through second tube (18) into second housing (14), around pulleys (28, 30) back into the first tube (16) and is attached to the other end of magnet assembly (52). A carriage (20) is slidably received on the first tube (16) and mounts thereon a second magnet (70) magnetically coupled to the magnet assembly (52). A wheel (74) or a block (92) having a bore therethrough rides on the second tube (18) to maintain the selected orientation of the carriage. First and second proximity switches (76, 78) are mounted in the housings adjacent the ends of the second tube (18) which respond to a sensor element (80, 81) attached to the timing belt (38).