| 摘要 |
A thermal toner fixing device for a xerographic apparatus comprises a heat dissipation mechanism for dissipating heat accumulating in a pressure roller rotating in contact with a heat roller so as to achieve substantially uniform thermal deformation throughout the pressure roller and, as a result, uniform contact with the heat roller irrespective of the width of the paper sheet being conveyed. The device enables both wide and narrow sheets of paper to be properly conveyed with high reliability. Preferably, the heat dissipation mechanism is a heat dissipation roller in contact with the pressure roller, and the heat dissipation roller has a substantially hollow interior for the passage of circulating cooling air. |
