| 摘要 |
PURPOSE:To secure sheet conveying force by means of stable, frictional engagedness, by making materials in use combine in a mutually assistant relationship with one another. CONSTITUTION:Each belt is made up of using chloroprene rubber for the right side but urethane rubber for the left side of upper side belts 11 and 11, while in case of lower side belts 12, 12 and 12, each belt is made up of using the chloroprene rubber for the central one but urethane for both sides. In this case, the chloroprene rubber is low temperature and low humidity and has a tendency to a frictional force drop while the urethane rubber also tends to dro its frictional force due to a no carbon paper respectively, but these drawbacks are set off by a mutually assistant relationship so that a drop in the frictional force is in no case produced as a whole simultaneously. |
