Patent ID: 8663748

Claim:
A method of producing a conductive roller comprising a shaft member axially bearing at both end portions in its longitudinal direction and one or more elastic layers arranged outside in a radial direction thereof, which comprises applying a compound forming an elastomer by curing through an electron beam irradiation or a ultraviolet ray irradiation onto an outside of the shaft member to form an elastomeric coating layer and then curing the elastomeric coating layer through an irradiation of an electron beam or a ultraviolet ray to form an elastic layer, wherein the compound is discharged through a discharge head of a die coater and spirally applied onto the shaft member while rotating the shaft member to form the elastomeric coating layer over a full length of the shaft member, wherein at least one of the shaft member and a layer-regulator that contacts with the elastomeric coating layer formed by the die coater before the curing while rotating the shaft member, is relatively displaced in the longitudinal direction of the shaft member to adjust a thickness and a surface smoothness of the elastomeric coating layer, wherein when the elastomeric coating layer is cured by irradiating the electron beam or the ultraviolet ray, an apparatus for irradiating the electron beam or the ultraviolet ray is relatively displaced to the shaft member in the longitudinal direction while rotating the shaft member to semi-cure the elastomeric coating layer, and then the elastomeric coating layer is full-cured at a subsequent step in the step of forming the elastomeric coating layer, and the semi-curing of the elastomeric coating layer is continuously conducted with the application of the elastomeric coating layer while rotating the shaft member, and wherein the layer-regulator is separately disposed from the discharge head, and the formation of the elastomeric coating layer and the layer regulation of the elastomeric coating layer formed are continuously conducted as the shaft member is rotated.