Fixing device for copying machine

Claim 1

A fixing device for use in a wet-type copying machine, comprising: a main rotatable body; means for heating said main rotatable body; and means for holding a sheet, which has a front side and a back side and carries on its front side a wet-type unfixed toner image, against said main rotatable body as heated by said heating means over a predetermined interval on the main rotatable body to allow the toner image to be fixed to the sheet and also to allow the sheet to be fed by said main rotatable body; wherein: the back side of said sheet makes contact with the main rotatable body while the front side, which carries said wet-type unfixed toner image, faces away from the main rotatable body and makes contact with said means for holding; the surface of the main rotatable body which makes contact with the back side of the sheet is smooth; and the surface of the means for holding which makes contact with the front side of the sheet has a multiplicity of fine projections; said holding means comprises an auxiliary roller adjacent to said main rotatable body for concurrent rotation therewith so that portions of said auxiliary roller and said main rotatable body will move in one direction, said main rotatable body and said auxiliary roller being capable of feeding a sheet held therebetween; said main rotatable body comprises a main roller heated by said heating means; and said auxiliary roller comprises at least two auxiliary rollers spaced from each other, said main roller and adjacent ones of said auxiliary rollers being relatively positioned such that an angle formed between a first line tangential to both said main roller and an upstream one of said adjacent auxiliary rollers in the direction of feed of the sheet and a second line tangential to the downstream auxiliary roller at point where said first line intersects the peripheral surface of said downstream auxiliary roller is an obtuse angle.