Abstract: A magnetic sensor comprises a magnetic material portion; an excitation portion; and a magnetic detection portion, the magnetic sensor detecting a magnetic field by the magnetic detection portion detecting a detection magnetic field generated due to magnetic moments of the magnetic material portion. The excitation portion is configured to include a conductive material formed into an elongated shape, the magnetic material portion is a soft magnetic film formed on a surface of the conductive material, and the magnetic moments of the magnetic material portion are oriented along circumferential directions of the conductive material orthogonal to a longitudinal direction of the conductive material such that the magnetic moments directed to one of the circumferential directions and the magnetic moments direction in another circumferential direction opposite to the one circumferential direction are distributed in substantially equal amounts.

Abstract: A magnetic sensor comprises a magnetic material portion; an excitation portion; and a magnetic detection portion, the magnetic sensor detecting a magnetic field by the magnetic detection portion detecting a detection magnetic field generated due to magnetic moments of the magnetic material portion. The excitation portion is configured to include a conductive material formed into an elongated shape, the magnetic material portion is a soft magnetic film formed on a surface of the conductive material, and the magnetic moments of the magnetic material portion are oriented along circumferential directions of the conductive material orthogonal to a longitudinal direction of the conductive material such that the magnetic moments directed to one of the circumferential directions and the magnetic moments direction in another circumferential direction opposite to the one circumferential direction are distributed in substantially equal amounts.

Abstract: A central control system that monitors and remotely controls one or more terminal devices which may be part of an apparatus such as an imaging machine. Each terminal device communicates with the central control system at a predetermined time and relays the operational conditions of the apparatus to which it is associated. Relayed conditions may include information such as the number of imaging operations performed in a period of time. The central control system controls each of the terminal devices in accordance with the information transmitted from each of the terminal devices. The central control system supervises incoming transmissions from the terminal devices and detects when a terminal device has not communicated at its predetermined time. When this condition arises, the identity of the non-reporting terminal, as well as the predetermined time it was to have contacted the central control system, are displayed at the central control system.

Abstract: A copying machine control system includes a plurality of copying machines, a plurality of data terminals connected to the individual copying machines and which collect identification data particular to the copying machines, and a centralized control unit performing communication of data with the data terminals through a communication network. Each copying machine stores identification data particular to that copy machine and transmits it to the data terminal in response to a request. Each data terminal includes a receiving device for receiving the identification data and a transmitting device for transmitting the identification data to the centralized controller. The centralized controller confirms the data terminal and associated copy machine and therefore accurate control can be achieved.

Abstract: An image forming apparatus equipped with a monochrome mode and color mode, in which the transfer drum is made to rotate without any paper wrapped around it to clean the transfer drum each time a series of copy operations is completed. By controlling the cleaning period through increasing or decreasing the number of non-paper rotations in response to the last copy operation mode, the transfer drum may be adequately cleaned at all times, and the amount of wear on the transfer drum and cleaning device caused by the cleaning operation is reduced.

Abstract: The present invention relates to an image forming apparatus having a first forming device forming a first toner image on a first surface of a sheet, a second forming device forming a second toner image on a second surface of the sheet, a detecting device detecting the amount of adhered toner on the first surface of the sheet, a setting device setting an forming output according to the amount of adhered toner detected by detecting device, and inputting device inputting the forming output to the second forming device in order to form the second toner image by the settled forming output. The object of the present invention is to provide a reliable image forming.

Abstract: An image forming apparatus in which a toner image formed on an image carrier is transferred onto paper held onto a transfer drum following which the paper is separated from the transfer drum, the image forming apparatus being equipped with a charger that charges a prescribed area of the image carrier before the image carrier is uniformly charged, a mode setting device that sets the image formation mode, and a control device that controls the output of the charger in accordance with the image formation mode set by the mode setting device.

Abstract: An image forming apparatus which performs image transfer on the rear side of a sheet by retransporting the sheet inverted via inverting section to a transfer drum in duplex copy mode. After an image has been transferred onto a rear surface of the sheet, the transfer drum is separated from an image bearing member, thereby separation agent, which is adhered to the transfer drum due to refeeding of the sheet that has once passed through fixing unit, is removed from the transfer drum without adhering to the image bearing member.

Abstract: A copying machine control system according to the present invention is a copying machine control system including data terminals collecting data related to copying machines, and a centralized control unit performing communication of data with the terminals through a communication network. Each terminal includes a holding device for holding an identification code for initialization and a first transmitter for transmitting an identification code to the centralized control unit when the centralized control unit is connected to a copying machine. The centralized control unit includes a memory for storing the identification code held in the data terminal, a confirming device for confirming a data terminal on the basis of the identification code and a second transmitter for transmitting the data for initialization to the confirmed data terminal, and the data terminal further includes an initialization device.

Abstract: A copying machine which detects its own condition, such as the surface potential of a photosensitive member and the toner density in a developer, and communicates with a central supervisory apparatus to transmit the detected data at a preset time or when a specified number of copies are made. The communication is controlled in accordance with the number of copies which have been made since the previous communication or the time which it has taken to make the specified number of copies since the previous communication. When the number of copies is smaller than a reference number or when the time is shorter than a reference time, the communication is canceled, or alternatively, the image forming apparatus sends the central supervisory apparatus such information. When regular communication is conducted, only items of data which have changed since the previous communication are transmitted.

Abstract: The invention relates a sheet separation apparatus including a sheet carrying member which is capable of holding a sheet thereon, a device positioning a sheet on the surface of the sheet carrying member, a device separating the held sheet from the sheet carrying member by predetermined sheet separating power, said separating means capable of changing the sheet separating power, and a device selecting sheet separating power of the separating device according with the surface of the sheet positioned by the positioning device. The object of the invention is to provide a reliable separation of the sheet from said sheet carrying member.

Abstract: A centralized control system capable of remote controlling terminal devices such as a copying machine or automatic vending machine by using communication lines. The system displays information identifying the terminal devices which have not transmitted the information to a central unit after predetermined time. Further, the system is provided with a back-up power source for backing up a memory storing the information to be transmitted and an IC for clocking the present time. The information stored in the memory is to be transmitted when the power is supplied again in the case where the transmission has not been carried out at the predetermined time because the power source for the terminal device was shut off. Moreover, the system judges, in the case where an image forming apparatus is adapted as a terminal device, whether the image forming apparatus has recovered from trouble condition to normal condition by judging whether a copy paper is actually discharged.

Abstract: A copying-machine management system for effecting centralized management of a plurality of copying machines in such a manner that data about problems developed during the maintenance of each copying machine is not counted as data about the problem occurring in each copying machine. A control CPU incorporated into a copying machine on the user side is electrically connected to a management CPU on the service station side through a communication line. Thus, a signal indicative of the state of the copying machine on the user side is sent to the management CPU on the service station, where each of the copying machines is managed. When a serviceman is sent to repair the copy machine, a serviceman mode is set. When the serviceman mode is set, the data indicating a problem is prohibited from being transmitted to the management CPU. Therefore, the data about a problem developed due to a reproduction test is not counted as the data about the problem occurring in each copying machine.

Abstract: A copying machine control system in accordance with the present invention includes a control terminal collecting data about a copying machine and a centralized control unit collecting data from the control terminal. The centralized control unit includes a first timer device for counting the present time, and a transmitting device for transmitting the present time counted by the first timer device as the present time data.

Abstract: A control apparatus according to the present invention is a control apparatus collecting data about copying machines and communicating with a centralized control unit on the basis of the collected data, including a detection device for detecting trouble occurrence on the basis of the data from the copying machines, a counter for counting the number of times the trouble occurrence in response to an output of the detection device, a calculating device for calculating a trouble occurrence frequency on the basis of the number of times of trouble occurrence while the copying machine performs copying operation for a predetermined number of times, a determination device for determining that the trouble occurrence frequency calculated by the calculating device exceeds a predetermined value, and a communication device for calling the centralized control device in response to an output of the determining device.

Abstract: A copying machine control system according to the present invention is a copying machine control system including a control terminal collecting data related to a copying machine, a centralized control unit for receiving the data collected by the control terminal, and a facsimile device provided corresponding to the control terminal. The control terminal includes a first receiving device for receiving data from the copying machine, and a first transmitting device for transmitting the data received by the first receiving device to the centralized control unit. The centralized control unit includes a second receiving device for receiving the data from the first transmitting device of the control terminal, a determination device for determining that the data received by the second receiving device is predetermined data, and a second transmitting device for transmitting predetermined image information to a facsimile device in response to an output of the determining device.

Abstract: A copier system or similar image forming system includes a centralized control unit. The centralized control unit has a data base storing information pertaining to machine model specifications, operating manuals and other related know-how pertinent to the operation of the copiers. Using data received from the copying machines, the centralized control unit employs fuzzy logic to identify abnormal operating conditions of the copiers and possible repair procedures.

Abstract: In a method and system for controlling a plurality of copying machines, plural control units respectively associated with the copying machines are connected with one another by means of a private branch exchange (PBX) telephone system. A control unit calls one or more of the other control units, internally through the extension lines of the PBX, at a prescribed data and time, to detect any abnormality in the operation of the called unit. If an abnormality is detected, a call is placed to a control center located external to the PBX, to thereby inform the control center of the detected abnormality.

Abstract: A control apparatus according to the present invention is a control apparatus collecting data related to copying machines and communicating with a centralized control unit on the basis of the data collected, including a communication device for calling the centralized control unit, a determination device for determining that connection with the centralized control device can not be made in spite of the fact that the communication device is activated, a setting device for setting a retransmission time on the basis of a random number in a predetermined time period in response to a determination output of the determination device, a timer device for counting the present time, and a control device for having the communication device call the centralized control unit again when the present time becomes the retransmission time.

Abstract: The present invention relates to an image formation method and the apparatus thereof. An electrostatic latent image formed on a photosensitive body is developed with toner, and the developed toner image is electrostatically transferred onto a recording sheet held on a transfer drum; in repeating the process a plurality of images are formed on the recording sheet. The electric charge on the transfer drum is increased by repeating the electrostatic transfer of the toner image, which can cause a trouble; therefore each time an image formation is completed, the charge on the transfer drum is removed. When a part of the recording sheet held on the transfer body on which the toner image is previously formed faces the photosensitive body, the transfer body is controlled to be apart from the photosensitive drum not to disarrange the image which is previously formed on the recording sheet.