| 摘要 |
Disclosed is a printer for printing on roll paper, comprising a roll paper holder (22) having an opening for loading a paper roll, a cover supported to be movable relative to the roll paper holder (22) between a first position in which it covers the opening and a second position in which it exposes the opening, a feed roller (26) and a first gear (31) both attached to the cover and coupled to each other, a motor (61) for rotatively driving the feed roller (26) via a first gear train (71-73), said first gear train including a second gear (73) fixed relative to the roll paper holder (22), wherein the first gear (31) is engaged with the second gear (73) when the cover is in its first position and is disengaged from the second gear when the cover is in its second position, and the first gear (31) is arranged to rotate relative to the second gear (73) until it has disengaged from the second gear when the cover (30) is moved from said first toward said second position, wherein said second gear (73) is adapted to be driven by said motor (61) such as to rotate in a first direction to advance said roll paper (4) via said feed roller (26), and releasing means are provided for allowing the second gear (73) to rotate in a second direction opposite said first direction, when the cover is moved from said first toward said second position. <IMAGE> |
