JP2006330459A5 - - Google Patents

Claims (7)

A transfer means for transferring a toner image formed on the image carrier to the transfer material in a process of feeding the transfer material and transporting in the apparatus; a charge eliminating means for separating the transfer material from the image carrier; In an image forming apparatus comprising: a fixing unit that fixes the transferred toner image to the transfer material; and a discharge unit that discharges the transfer material to the outside of the apparatus.
Provided upstream of the transfer means in the transfer material conveyance direction is a conductor detection means for detecting whether or not a part of the transfer material has a conductor, and the conductor detection means places the conductor on the transfer material. An image forming apparatus comprising: turning off a bias applied to the charge eliminating unit when it is detected that the charge eliminating unit is included. A transfer means for transferring a toner image formed on the image carrier to the transfer material in a process of feeding the transfer material and transporting in the apparatus; a charge eliminating means for separating the transfer material from the image carrier; In an image forming apparatus comprising: a fixing unit that fixes the transferred toner image to the transfer material; and a discharge unit that discharges the transfer material to the outside of the apparatus.
Provided upstream of the transfer means in the transfer material conveyance direction is a conductor detection means for detecting whether or not a part of the transfer material has a conductor, and the conductor detection means places the conductor on the transfer material. An image forming apparatus characterized in that a bias applied to the charge eliminating unit is made to have the same potential as that of the transfer unit when it is detected. If the output from the conductor detecting means has rotation Utsushizai value P ₀ indicating no _value P ₁ showing only the transfer _material, and the value P ₂ that indicates the transfer material including an electrical conductor, wherein the output transfer material conveying 3. The image forming apparatus according to claim 1, wherein the transfer material is determined to have a conductor when the direction changes in the order of P ₀ , P ₁ , P ₂ , P ₁ , P _0. .   The image forming apparatus according to claim 1, wherein the conductor detection unit detects a value of electrostatic induction with the transfer material interposed therebetween.   3. The image forming apparatus according to claim 1, wherein the conductor detection unit performs transmission / reception with an ultrasonic wave sandwiching the transfer material, and determines that the conductor is included by a change in the received ultrasonic wave.   The conductor is an RFID, and it is detected that the RFID is included in the transfer material by reading the unique ID of the RFID by an RFID reading means in the transportation to the transfer means. The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus.   The bias applied to the static eliminator is turned off, or the position where the bias applied to the static eliminator is set to the same potential as that of the transfer unit is performed from a position conveyed by 20 mm or more from the front end of the transfer material. 3. The image forming apparatus according to 1 or 2.