摘要:
An image forming apparatus includes an image carrier which carries an electrostatic image, a developing device for developing the electrostatic image using toner, a rotating transfer member which transfers a toner image on the image bearer, a charging device for charging an image bearer on which residual toner is deposited due to transfer by the rotating transfer member, the charging device allowing residual toner on the image bearer to be collected, and a returning device for returning toner in the charging device to the image bearer, the rotating transfer member transferring onto the rotating transfer member at least a portion of toner returned to the image bearer by the returning device.
摘要:
An image forming apparatus includes an image bearing member for carrying a toner image; a recording material conveyer belt for electrostatically carrying and feeding a recording material; a roller, provided on a side of the recording material conveyer belt not carrying the recording material in a separation position where the recording material is separated from the recording material conveyer belt, for supporting the recording material conveyer belt; a transfer charger for electrostatically transferring the toner image from the image bearing member onto the recording material at a transfer position; a discharge, provided across the recording material conveyer belt from the roller at the separation position, for discharging the recording material upon separation thereof from the recording material conveyer belt; wherein the roller is electrically grounded through an element in which a voltage is generated when the current is supplied thereto.
摘要:
An image forming apparatus includes an image forming section for forming an image on a recording material with transparent toner; a heater for heating a first image and a second image which are formed on the recording material by the image forming section as transparent images different in toner coverage per unit area; a glossiness detector for detecting glossiness of the first and second images after the first and second images are heated; and a correction section for correcting an image forming condition of the image forming section on the basis of a glossiness toner coverage characteristic obtained by a detection result of the detector.
摘要:
In a development device which develops an electrostatic image formed on a rotating photosensitive drum by applying a development bias to a development sleeve bearing a two-component developer, the development device includes a specific pattern determination portion which determines whether or not the electrostatic image includes a specific pattern. When the development device develops the specific pattern electrostatic image determined by the specific pattern determination portion, a potential difference between a development sleeve and a first non-image part of a predetermined range which is adjacent to the specific pattern electrostatic image and located on an upstream side in a photosensitive drum rotating direction is set smaller than a potential difference between the development sleeve and a second non-image part which is different from the first non-image part.
摘要:
A developing device includes a developer-bearing member supporting developer for developing electrostatic images, a first chamber supplying the developer to the developer-bearing member, a second chamber below the first chamber, first and second communicating portions connecting the first and second chambers, a first carrying member carrying the developer in the first chamber in a first direction from the first communicating portion to the second communicating portion, a second carrying member carrying the developer in the second chamber in a second direction from the second communicating portion to the first communicating portion, and a partition between the first and second chambers. A bottom portion of the first chamber is inclined such that a downstream end thereof in the first direction is higher than the other end at a position where the bottom portion faces the developer-bearing member.
摘要:
An image forming apparatus which improves uneven gloss occurring at the step of fixing a transparent toner is provided with an image bearing member on which a latent image is formed, a transparent toner image forming device for forming a transparent toner image on the image bearing member, a transferring device for transferring the formed transparent toner image onto a recording material, a fixing device for fixing the transferred transparent toner image on the recording material, and a controller for controlling the bearing amount of the transparent toner image formed on the image bearing member, and the controller controls a condition for forming the transparent toner image to change the bearing amount of the transparent toner image in accordance with the fixing temperature of the fixing device.
摘要:
A developing apparatus having: a first developer carrying member close to a developer regulating member for regulating an amount of developer; a second developer carrying member to which the developer is delivered from the first developer carrying member; and a mode for removing the toner on the surface of the second developer carrying member, in which mode, in a non-image-formation period, no toner transfer operation from the first developer carrying member to an image bearing member is substantially performed, but a toner transfer operation from the second developer carrying member to the image bearing member is performed.
摘要:
An image forming apparatus includes a toner image forming portion for forming a toner image on a first image bearing member, a first transferring portion for transferring, onto a second image bearing member, the toner image on the first image bearing member, a second transferring portion for transferring, onto a transferring material, the toner image on the second image bearing member, a cleaning unit including a cleaning member abutting on the surface of the second image bearing member, and a transferring material recognizing portion for recognizing a type of the transferring material. The toner image forming portion forms a toner image for cleaning on the first image bearing member in accordance with information about a type of the transferring material that is recognized by the transferring material recognizing portion. The first transferring portion transfers, onto the second image bearing member, the toner image for cleaning on the first image bearing member, and the cleaning unit collects the toner image for cleaning on the second image bearing member.
摘要:
An image forming apparatus has a plurality of image bearing members which are disposed along the conveying direction of transfer material and on which latent images are formed. Developing devices are disposed corresponding to the plurality of image bearing members and develop the latent images with developers. A transfer material bearing and conveying member and a transfer device to sequentially transfer the developer images developed on the plurality of image bearing members to the transfer material on the transfer material bearing and conveying member are also a part of the image forming apparatus. The apparatus also has a cleaning member which cleans the surface of the transfer material bearing and conveying member. A developer image that is not to be transferred onto the transfer material is formed only onto one image bearing member disposed downstream in the movement direction of the transfer material bearing and conveying member among the plurality of image bearing members. The developer image is transferred onto the transfer material bearing and conveying member by the transfer member and the transfer material bearing and conveying member is moved so that the transferred developer image reaches the cleaning member.
摘要:
An image forming apparatus includes an image forming device for electrostatically forming a toner image onto a transfer material, a charger for previously charging the surface of the transfer material to which the toner image is transferred to a polarity opposite to the normal charge polarity of the toner, and a control device for controlling a voltage to be applied to the charger in accordance with the kind of transfer material.