Konica Corporation

Konica Minolta Business Technologies, Inc.

Kouichi Sawada

Yoshiyuki Ichihara

Hiroyuki Yamamoto

Jun Nakagawa

Satoshi Haneda

Takayuki Suzuki

Toshihiro Motoi

Masashi Sugano

Kouichi Takaki

Hiroyuki Futami

Kazuo Yasuda

Noboru Koizumi

Hideki Morita

Disclosed is an image forming apparatus which registers jobs in an order of acceptance of the jobs and which carries out an image forming process and a post-processing for a recording medium according to a content of the registered jobs comprising a comparing unit to compare a time needed for a post-processing of a first job which is being executed with a time needed for an image forming process of a second job which is on stand-by and which is registered and a control unit to execute the image forming process of the second job which is on stand-by after an image forming process of the first job which is being executed is ended and while the post-processing of the first job is being executed according to a comparison result of the comparing unit.

Image forming apparatus having a comparing unit and a controlling unit

An image forming apparatus which forms an image on a recording material, which has: a writing section to write according to the image data; an oscillator to generate a synchronized synchronizing clock signal; a spreading clock generator to spread the band of a synchronized reference clock and generate spreading clock signals; and a plurality of control circuits to control the image forming apparatus and each section of the image forming apparatus including a writing control circuit to control the writing section. More than one control circuits in the control circuits other than the writing control circuit are driven by the spreading clock signals, and the writing control circuit is driven by the synchronizing clock signal.

Image forming apparatus and image reading device for use in the apparatus

An image processing method includes the steps of: detecting an inclination of image data; storing the image data for one line into a first memory; changing a reading timing when the image data is read from the first memory, according to the detected inclination, whereby correcting a shift in a main scanning direction; storing the image data for not smaller than 2 lines into a second memory; and changing a line position in a sub-scanning direction when the image data is read from the second memory, according to the detected inclination, whereby correcting a shift in the sub-scanning direction.

Image processing method and image forming apparatus

An image forming apparatus includes an image carrier, a laser diode for generating a plurality of light beams, and a rotating polygonal mirror for simultaneously scanning the image carrier in a primary scanning direction along respective lines which are parallel to each other in a secondary scanning direction. The image carrier is scanned once for each of a plurality of different colors to thereby form a color image on the image carrier. A photosensitive sensor is provided for detecting an amount of deviation of the plurality of light beams in the primary scanning direction with respect to a first color of the plurality of different colors, and deviations among the plurality of light beams in connection with scanning for each of the plurality of different colors are corrected according to the detected amount of deviation with respect to the first color of the plurality of different colors.

Color image forming apparatus having means for correcting deviations between scanning light beams accurately and in real time

An image forming apparatus includes an image input section for inputting a packed unit of image data corresponding to n pixels, where n is greater than or equal to 2. A clock generating section is provided for generating a first clock having a predetermined period, and a second clock having a predetermined synchronization relation to the first clock and a shorter period than the predetermined period of the first clock. A pixel dividing section is provided for expanding the inputted image data corresponding to n pixels into image data corresponding to one pixel. The pixel dividing section expands the image data corresponding to n pixels in synchronization with the first clock, and an image recording section records an image in a unit of one pixel in synchronization with the second clock in accordance with the expanded image data.

Image forming apparatus

In an image forming apparatus for simultaneously recording plural image lines on a recording medium by scannintg simultaneously with plural light beams along parallel scanning lines in a primary scanning direction, before a deviation detector detects a deviation among the plural light beams in the primary scanning direction, a beam power controller adjusts the electric power for each light beam generator so that the beam diameter of each light beam is made equal to each other.

Synchronization signal generating unit of an image forming apparatus

An image forming machine in which an image is formed on a recording material by an imagewise exposure to a light source that is modulated in accordance with to an image signal. The machine includes a device for generating a reference wave with a predetermined frequency, a generator for generating a pulse width modulating signal to modulate the light source in accordance with the image signal and the reference wave. A ratio of the frequency of the image signal to the predetermined frequency of the reference wave is set based on a relationship 1:(1+n/m) where n and m are positive integers and n is less than m.

Image forming apparatus using pulse width modulation

In a color toner image forming apparatus equipped with a scanning device to scan a photoreceptor with a light beam which is modulated on the basis of image density represented by image signals so that a latent image is formed on the photoreceptor; there is provided a control device to control the color toner image forming apparatus so that plural color toner images are superimposed on the photorecetor. The control device includes a start position control circuit to control a scanning start position of the scanning device so that the scanning start position is shifted for each of the plural color component images.

Image forming apparatus to provide multicolor images

An apparatus for forming an image with modulated image lights which are obtained by modulating an image light in accordance with image signals, including a reference pattern signal generation circuit, a comparator to compare image signals with a reference pattern signal so as to produce a pulse width modulation signal, and a circuit to shift the level of the image signal of either a maximum or minimum value to a level out of the amplitude of the reference pattern signal.

A document size detector for detecting a size of a document in use with a document scanner. The document size detector has an irradiator to irradiate the document with a light beam; a cover of the document; a receiver of the reflection light from the document and the cover; a converter to convert the reflection light to image signals; a detector to detect the shadow of the document on the cover in the image signals; and the determiner to determine the size of the document according to the detected shadow of the document.

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Tokyo, Japan

Kouichi Sawada