| 摘要 |
PURPOSE:To prevent inconvenience due to a surplus liquid by making a control layer of a material by which a passing property of a liquid is increased when it is elongated slide-contact with a rotating body, supplying an offset preventive liquid of a proper quantity at the time of an operation, and stopping the supply when the operation is ended. CONSTITUTION:A control layer 10 is constituted of a porous elastic body whose passing property is increased when it is elongated, and slide-contacts with a roll 1. When the roll 1 is rotated, the layer 10 is elongated by DELTAl in the rotating direction by frictional force against the roll 1, and is restored when the rotation is stopped. Accordingly, at the time of the fixing operation, the layer 10 supplies oil of a proper quantity to the roll 1, but when the fixing operation is ended and the rotation of the roll 1 is stopped, the layer 10 is restored and reduces or eliminates the oil passing quantity. Accordingly, it can be prevented that surplus oil adheres onto the fixing roll and paper is contaminated after the fixation is ended. |
