| 摘要 |
<p>A thermal printer for wide printing comprises a plurality of offset thermal print heads (61, 62, 63, 64) bearing against a rounded fixed anvil (36). The heads (61, 64) are mounted so that the active faces of each pair of successive heads form a dihedral angle in order to make tangential contact with the anvil (36) along the active lines of the heads. The printer includes a drum (52) for driving the paper (27) with the drum having a diameter which is greater than a predetermined value. Printing is controlled in response to a signal representative of paper advance as generated by an encoder (86) driven by a wheel (85) in tangential contact with the paper (27).</p> |
