摘要:
A color-mixing fixing device includes a first fixing rotary member, and a second fixing rotary member for forming a nip together with the first fixing rotary member. After toner images of a plurality of colors stacked on one surface of a recording medium are fixed by a nip, toner images of a plurality of colors stacked on the other surface of the recording medium are fixed by the nip, thereby forming full-color images on both the surfaces of the recording medium. Each of the first and second fixing rotary members has a surface rubber layer with an impact resilience of 50% or less.
摘要:
An image forming apparatus, such as a copying machine, has a fixing device for fixing a developer image transferred to a transfer medium, such as paper, with a fixing roller whose surface is coated with a release agent, such as oil, and includes at least one feed passage member for conveying, while contacting, a transfer medium to a transfer region of the apparatus. The feed passage member has a release agent absorbing layer on the surface thereof, and is thus advantageous for preventing release agent from being transferred and adhered to a photo-sensitive drum of the apparatus. The release agent absorbing layer of the feed passage member may contain either porous particles or particles and a binder resin, and be formed on another layer for retaining release agent absorbed by the release agent absorbing layer. The feed passage member preferably constitutes a transfer medium carrying member, which may include a dielectric sheet, for supporting and carrying a transfer medium. The member may alternatively constitute a pick-up roller, a feed guide, and/or a resist roller of the apparatus.
摘要:
The invention is for an elastic body formed by addition reaction type silicone rubber elastic material. The material is obtained by curing a polysiloxane mixture including at least (a) straight-chain dimethyl polysiloxane having the viscosity of 8000 poise or more at a temperature of 25.degree. C. and terminated with vinyl groups; and (b) resinous organopolysiloxane having at least two vinyl groups and having the viscosity of 10-1000 poise at the temperature of 25.degree. C. and a resin segment with at least one of a 4-functional constitutional unit and a 3-functional constitutional unit, and an oil segment with a 2-functional constitutional unit. The elastic body is used in forming an elastic roller and fixing device using an elastic roller.
摘要:
A fixing device includes a fixing rotating member for grasping and conveying a recording material supporting an unfixed image, and a coating means for coating release oil on the fixing rotating member.The rotating member includes an elastic layer and an offset prevention layer provided on the elastic layer.An oil absorption rate of the elastic layer for the oil is 5-20 wt %, and an oil absorption rate of the offset prevention layer for the oil is 30-150 wt %.
摘要:
An image forming apparatus includes a manual sheet feeder for permitting a recording material to be manually fed; cassette feeder for feeding a recording material from a cassette; an image forming device for forming an image on the fed recording material; double side mode selector for selecting a double side mode in which the images are formed on both surfaces of the recording material; wherein the image forming device is conditioned for forming the images on both surfaces, when the manual feeder is in manual feeding state, and the double side mode is selected by the double side mode selecter.
摘要:
An image heating apparatus includes a hollow image heating roller having a through hole at one axial end portion side thereof; a bearing fitted around the roller; a heat insulating bush fitted around the roller between the roller and the bearing; a retaining ring for preventing the heat insulating bush from moving relative to the roller; an annular spacer provided between the heat insulating bush and the retaining ring, the annular spacer being provided with an inwardly protruded key portion engageable with the through hole.
摘要:
The present invention relates to an electrophotographic apparatus in which the apparatus is provided with a sequence in which a dark portion and a light portion are formed on a first portion and a second portion, respectively, on a photosensitive member by an electrostatic image forming device, whereafter the first portion and the second portion are exposed by a pre-exposure device, and then the first portion and the second portion are charged by a charger, and then a surface potential of the first portion and the second portion are detected by a detector, and an exposure amount at which the photosensitive member is exposed by the pre-exposure device is controlled in conformity with the potential of the first portion and the potential of the second portion detected by the detector in the sequence.
摘要:
A color image forming apparatus comprising: an input device for inputting image signals denoting a plurality of color components; an under color processing device for processing the under colors of the image signals denoting a plurality of the color components supplied by the input device; an image forming device for forming images in response to the image signals denoting a plurality of the color components, which have been processed by the under color processing device, and image signals denoting the under colors by using coloring agents which correspond to a plurality of the color components and the under colors, the coloring agents, which correspond to the under colors, having glossiness lower than that of the coloring agents which correspond to a plurality of the color components; and a control device for controlling the glossiness of the image formed by the image forming device by controlling the quantity of process of the under colors processed by the under color processing device.
摘要:
An image heating apparatus includes a hollow image heating roller having a through hole at one axial end portion side thereof; a bearing fitted around the roller; a heat insulating bush fitted around the roller between the roller and the bearing; a retaining ring for preventing the heat insulating bush from moving relative to the roller; an annular spacer provided between the heat insulating bush and the retaining ring, the annular spacer being provided with an inwardly protruded key portion engageable with the through hole.
摘要:
An image heating apparatus includes a heating rotatable member for heating an image on a recording material in a heating nip; a magnetic flux generator for generating a magnetic flux for induction heat generation in the heating rotatable member; a magnetic flux confining device for confining the magnetic flux directed toward a predetermined region of the heating rotatable member from the magnetic flux generator; and a moving device for repeatedly moving the magnetic flux confining device during a heating operation between the operating position and a retracted position retracted from the operation position, when the recording material which has a predetermined width overlapping with a part of the predetermined region is continuously heated by the apparatus.