Patent ID: 6974127
Filing Date: 2005-12-13
Classification: B41J

Abstract:
1. A drive apparatus of an ink jet printer, including a frame, in which a sheet of paper stacked in a paper feed cassette is picked up by a pickup roller, conveyed by a convey roller and a pinch roller, and then printed by a printer head while being line-fed by a feed roller, the drive apparatus comprising: a first gear train, disposed on a feed roller shaft having the feed roller assembled thereto, to swing within a predetermined angle around the feed roller shaft in a feed roller shaft rotation direction; a second gear train, disposed on the frame of the ink jet printer, to be in contact with the first gear train; a third gear train, with a front end gear connected with a rear end gear of the second gear train and a rear end gear coaxially disposed on a convey roller shaft having the convey roller assembled thereto, the third gear train swinging within a predetermined angle around a front end gear shaft, having the front end gear assembled thereto in a feed roller rotation direction; and a control unit controlling the first gear train and the second gear train to separate from each other by the entrance of the paper into the feed roller so that the driving power is blocked to the convey roller.