Minolta Camera Kabushiki Kaisha

Konica Minolta Business Technologies, Inc.

Minolta Company, Ltd.

Shigeo Ogino

Masaaki Nishiyama

Tadayuki Ueda

Yoshihito Sasamoto

Takashi Nara

Akifumi Isobe

Hiroyuki Watanabe

Masazumi Ito

Yoshihiko Hirota

Keiji Nakatani

Takahiro Tsujimoto

Tomoji Murata

Akinori Kimata

Yasuhiro Ishihara

Katsuhide Sakai

Yoshikazu Naito

Natsuyo Higashi

Munehiro Natsume

Hiroyuki Yoshikawa

Masaaki Goto

Kazuaki Shiotsuka

An image forming apparatus having a process correction mode wherein when a temperature of a fixing device in an image formation system in a power-on state is equal to or less than a predetermined value, the image forming apparatus increases the fixing temperature to the predetermined value. The apparatus sets the process correction mode based on power-on information output from a first detector which detects presence of the power-on state for the fixing device and fixing temperature information output from a second detector which detects a fixing temperature in the fixing device, and sets a priority level for performing a correction processing of the color misregistration to be lower than a correction processing comprising an image density adjustment.

Image forming apparatus for image density adjustment

A tandem type color image forming apparatus which executes color misregistration correction, including: a detecting section which detects a width of a transfer sheet; an image forming section having an image carrier, on which arranged side by side are an image area where formed is an image for transfer and a non-image area where formed is an imprint image; and a control section which selects a complex or a single correction mode based on the transfer sheet width, to execute correction processing; where the complex correction mode is an operation mode of forming in parallel the image for transfer in the image area and the imprint image in the non-image area, and the single correction mode is an operation mode of suspending to form the image for transfer in the image area, and executing only to form the imprint image in the non-image area or in the image area.

Color image forming apparatus which executes color misregistration correction processing

Provided is an image data transmitter in which, in the event of transmission of the same image data to multiple recipients, the image data with added supplementary information different for each of the multiple recipients can be transmitted through easy operation. Further provided is an image data communication system using the image data transmitter. An image of a document is read out, and a destination of the image is set. Multiple destinations can be set. Then, selection is performed whether or not to input supplementary information. When performing input processing, a destination to which the supplementary information is to be transmitted is selected from the multiple destinations. Subsequently, the supplementary information for the destination is input, and the supplementary information is correlated with the destination. Additionally, the image data and the supplementary information are combined. Then, composite data for the destination is transmitted to the destination.

Image data transmitter and image data communication system

A recycle information system for recycling reusable parts from machines and equipment such as image forming apparatus, and reutilize the recovered member as a manufacturing material. A recycle information system utilizing a production control computer to manage information on production parts being used or scheduled for use in manufacturing and maintenance services, is linked by a communications line with a control device for machines and equipment scheduled for recycling, monitors information on parts of machines and equipment capable of recycling, and when a machine is recovered from a user, compares production part information stored in the production control computer with recovered part information stored in the recovered device, and acquires information on whether individual parts used in the recovered machine are capable of being recycled, and information on a factory destination address.

Recycle information system and image forming apparatus for recycling

There is disclosed an image forming apparatus for generating a printing signal having a pulse width according to image density data corresponding to an image to be formed and forming dot images on a paper, each dot image having a size corresponding to the pulse width. An integrating circuit integrates the image density data for a predetermined integration period and outputting integrated image density data, and a comparator compares the integrated image density data with a predetermined threshold data and generating a printing signal having a pulse width corresponding to the comparison result thereof.

Image forming apparatus comprising integrating means for integrating

Disclosed is a driving apparatus of a laser diode, comprising a light detection circuit serial-connected with a pin diode detecting the intensity of the emission of light from the laser diode, the light detection circuit producing a signal depending on the intensity of the emission detected by the pin diode, a modulation circuit serial-connected with the laser diode, the output current of the modulation circuit varying depending on the difference between an input signal and the signal outputted from the light detection circuit, and a constant voltage drop device disposed in the series circuit including the laser diode and the modulation circuit, the constant voltage drop device causing a voltage drop of a certain degree regardless of the strength of a current flowing thereto. A Zener diode having Zener voltage equivalent to the dropped constant voltage or having at least one diode which generates forward voltage drop equivalent to the dropped constant voltage or the like is used as the above constant voltage drop device, the device being disposed, for example, between the laser diode and the modulation circuit.

Driving apparatus of a laser diode

An image forming apparatus including a movable type developing unit carrying a plurality of developing devices for performing a developing function using a plurality of color toners. The developing unit is vertically moved along a photosensitive drum. It is detected by a sensor whether or not a selected developing device is at a first position of the level of the developing position. In carrying out a developing operation, the developing device at the first position is moved to a second position adjacent to a photosensitive drum. The following problems are detected based on the ON and OFF state of the sensor: if the developing device does not move to the second position a predetermined period of time after an instruction for moving it from the first position to the second position is issued or if the developing device does not move to the first position a predetermined period of time after an instruction for returning it from the second position to the first position is issued. Based on the detection of the above problems, the developing unit is prohibited from vertically moving and copy paper is discharged from the apparatus.

Multi-colored image forming apparatus having a movable support member

An image forming apparatus such as a digital color copy machine is disclosed. The image forming apparatus provides an image reader, an amplifier for amplifying image signals read by the image reader, a laser driver for driving a laser diode to form an image on a recording medium and a switching circuit for switching the amplification gain according to the kind of image to be formed.

Image forming apparatus and method therefor

There is disclosed an image forming apparatus having a function for correcting the gradation characteristic of an image formed so as to be linear to the gradation degree. The image forming apparatus has a correction circuit for correcting inputted graduatin data to gradation data having a number of gradation degrees larger than that of the inputted gradation data to represent gradation data of a document image more precisely, for example in a range of low gradation. There is also disclosed a test mode for detecting an actual .gamma.-characteristic of the image forming apparatus by measuring toner densities of test images formed on a recording medium beforehand.

Image forming apparatus

An image forming device which can form an image by printing a plurality of dots based on an image information that contains a plurality of density data corresponding to a plurality of pixels defined by the fractionalization of the original image, and which can express the density of an image by controlling the number of dots to be printed within a predetermined tone unit area. The image forming device includes a threshold pattern generator for generating a threshold pattern which is a repetition of a basic pattern including a predetermined number 'L' of thresholds, a comparator for comparing respective density data with a predetermined number 'M' of thresholds selected from all 'L' of the thresholds in which 'L' is not an integer multiple of 'M', and for producing a predetermined number 'M' of print data corresponding to the respective density data; and a printer for printing on a printing sheet dots corresponding to the 'M' print data in a line along a main scanning direction.

Image forming device which can form an image by printing a plurality of

There is disclosed an image forming apparatus comprising a semiconductor laser diode for emitting a laser light onto a photoconductor so as to form an electrostatic latent image thereon. The electrostatic latent image is developed using toner so as to form a visible toner image on the photoconductor, and there is set a predetermined bias voltage to be supplied to the laser diode. The set bias voltage is applied to the laser diode, and also a driving voltage is applied thereto responsive to image data. When no image data are inputted, the predetermined bias voltage is applied to the laser diode, and a density of a toner image formed on the photoconductor is detected. A controller sets a bias voltage to be applied to the laser diode responsive to the detected density of the toner image.

Image forming apparatus comprising means for setting a proper bias

An improved charger eraser assembly for an electrophotographic copying machine is provided. In a first mode of operation selected by the user, a uniform erasure of a predetermined area of the photoreceptor drum can be accomplished. In a second mode of operation, an imprinting of alphanumeric information on the photoreceptor drum can be achieved. The illumination emitting unit includes a plurality of individual controllable light emitting elements. The illumination emitting unit can be controlled to be moved relative to the photoreceptor drum to permit the light rays of adjacent light emitting elements to either overlap or to abut each other on the photoreceptor drum. Alternatively, a lens array can be inserted in the optical path for controlling the position of the light rays of the adjacent elements.

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Toyokawa, Japan

Shigeo Ogino