Konica Corporation

Kenji Taki

Takao Kurohata

Chiharu Kobayashi

Yasuhiko Yamaguchi

Kiyoshi Kimura

Hiroshi Ishii

Masakazu Fukuchi

Hiroyuki Maruyama

Hiroshi Fuma

Isao Matsuoka

Takahiro Tsuchiya

Yoshimi Mizoguchi

Makoto Takeda

Masashi Akamatsu

Kojiro Akutsu

A toner replenishing apparatus includes: a toner reservoir section for reserving a toner therein; and scraper for scraping out the toner in the toner reservoir section and for supplying the toner to a developing device. The scraper is composed of a plurality of scraping members each having a different capability of scrape-out from each other.

Toner replenishing apparatus having a plurality of scraping members of

An image forming apparatus includes a sequence memory to store a sequence of an initialization processing to be conducted only at an installation of the apparatus, an adjuster to adjust the apparatus in accordance with the initialization, an apparatus status indicator to indicate whether the apparatus is new or not. The apparatus further includes a controller so that the adjuster adjusts the apparatus on the basis of the status of the indicator. A judging device judges whether to continue or stop the initialization process on the basis of a predetermined state of the apparatus such as whether a process unit is new or old or whether a cover is attached to a photoreceptor or not.

Image forming apparatus with judging device for judging whether to

An image forming apparatus includes a process unit provided detachably attachable to the apparatus; a driving source provided inside the apparatus and outside the process unit; a power transmitter to transmit a driving force from the driving source; a rotary member provided inside the process unit, the rotary member being rotated by the driving force from the driving source transmitted through the power transmitter. The apparatus further includes a detector to detect a state of rotation of the rotary member, and to output a signal corresponding to the state of rotation of the rotary member; and a judging member to judge a rotation abnormality of the rotary member on the basis of the signal output from the detector.

Rotation abnormality detecting device for use in image forming apparatus

An electrophotographic color image forming machine registers which a second color toner image on a first color toner image which has been previously formed on an image carrier to form a color image. The registered images are then transferred onto a recording sheet. The machine includes control apparatus that includes first and second exposure control modulators which respectively control an exposure amount of at least one of the first color toner images and the second color toner image. A smoothing processor controls at least one of a size and a position of at least one of the first and second color toner dot images within each of a plurality of pixels and a discriminator determines whether one of the size and the position of the dot image should be controlled. A hue corrector is provided which adjusts a ratio of the exposure amounts provided by the first and second exposure control modulators to control the first and second exposure control modulators on the basis of a discriminator result of the discriminator.

Image forming apparatus with exposure, size, and position correction for

An image forming machine, such as a copier or a printer, for forming a toner image on a recording sheet includes a developer for forming a toner image on a photoreceptor, the photoreceptor holding the toner image on its surface; a transfer device for transferring the toner image onto the recording sheet; a light emitting device for irradiating a light beam onto the surface of the photoreceptor; a light receive for detecting a reflection of the light beam from the surface of the photoreceptor, and for generating a variable detection signal according to an amount of the reflection of the light beam; a first comparing circuit for comparing a value of the variable detection signal with a first predetermined threshold value, and for generating a first comparison signal; a first judgment circuit for determining whether or not a sheet wrapping jam of the recording sheet on the photoreceptor occurs according to the first comparison signal; a first memory for storing the value of the variable detection signal when the first judgment circuit determines that the sheet wrapping jam occurs; a first calculation circuit for calculating a second threshold value according to the value of the variable detection signal stored in the first memory; a second comparing circuit for comparing the value of the variable detection signal with the second threshold value, and for generating a second comparison signal; and a second judgment circuit for determining whether or not a sheet wrapping jam of the recording sheet on the photoreceptor is solved according to the second comparison signal.

Image forming apparatus with a sheet wrapping detection apparatus

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Hachioji, Japan

Kenji Taki