COATING DEVICE OF RELEASING AGENT

PURPOSE:To eliminate the clogging of heat-resistant felt impregnated with a releasing agent and to permit the long-period use of said felt and the adjustment of the amt. of the oil to be coated by interposing a high-polymer porous film between the felt and fixing roller and adhering the belt and the porous film in the part except the contact part with the fixing roller. CONSTITUTION:The porous ethylenetetrafluoride film 4 having 0.5mu pore size, 70% porosity and thickness t' is adhered by compression bonding under heating via an FEP film 5 having a thickness t'' and width W' on one surface of the ''Nomex'' felt 3 having the thickness t, width W and length L. Such coater is set on the fixing roller. The stripping of the film 4 and the felt 3 and the clogging of the felt by a toner are eliminated even after continuous passage of 50,000 sheets of paper. The coater is ready to use when the oil is replenished thereto and the consumption of the oil in this case is about 15g.