Konica Minolta Business Technologies, Inc.

Konica-minolta Holdings, Inc.

Konica Corporation

Jeol Ltd.

Tetsu Sekine

Takashi Hasebe

Shuta Hamada

Saburo Shimizu

Satoshi Masumi

Yujiro Ishida

Atsushi Nakajima

Takashi Tamura

Utami Soma

Hideo Isohara

Satoshi Ogata

Takeo Arai

Koji Murakami

Yoshiki Katayama

Taku Saito

Yoshiyuki Ando

Toshiaki Tomino

Satoshi Hamaya

Shin Kaneko

Masato Kudo

Toyohiko Tazawa

Minoru Shigematsu

An image forming apparatus includes: an image forming section which forms an image on a sheet; a conveyance section which conveys the sheet to the image forming section, having a registration roller, a plurality of loop forming rollers which cause the sheet to form a loop, provided upstream of the registration roller in a sheet conveyance direction and arranged in a direction perpendicular to the sheet conveyance direction, a skew detection sensor which detects a skew of the sheet, and a conveyance roller provided upstream of the loop forming roller; and a control section which controls a driving of the conveyance section. The control section controls independently each of the plurality of loop forming rollers based on the detected result of the skew detection sensor.

Image forming apparatus

In an image forming apparatus including an image forming section which forms an image on a sheet and a conveyance section which conveys the sheet to the image forming section, the conveyance section includes: a registration roller, a plurality of loop forming rollers which cause the sheet to form a loop, provided upstream of the registration roller in a sheet conveyance direction and arranged in a direction perpendicular to the sheet conveyance direction, a skew detection sensor which detects a skew of the sheet, and a conveyance roller provided upstream of the loop forming roller; and a control section which controls independently each of the plurality of loop forming rollers based on the detected result of the skew detection sensor. The conveyance roller is swung in the direction perpendicular to the sheet conveyance direction.

There is described a paper sheet conveyance apparatus and an image forming apparatus, which makes it possible not only to achieve the minimization and the cost reduction of the apparatus; but also to achieve the high-speed conveyance operation of the paper sheet without generating any step out of the stepping motor. The paper sheet conveyance apparatus, includes: a pair of conveyance rollers to convey a paper sheet; and a stepping motor to drive one of the pair of conveyance rollers. At least one of the conveyance rollers is a roller made of aluminum alloy metal. Further, the roller made of the aluminum alloy metal is shaped in a hallow cylinder. Still further, a surface hardening treatment is applied to a circumferential surface of the roller made of the aluminum alloy metal.

Paper sheet conveyance apparatus and image forming apparatus

An image forming apparatus for communicating with a management apparatus for storing a plurality of electronic prepaid information and authentication information related to the plurality of electronic prepaid information, and replaying to inquiry request for electronic prepaid information based on authentication information through a portable communication terminal storing authentication information. The image forming apparatus may include a connector to which the portable communication terminal is connected, a communication section for controlling the portable communication terminal and controlling communication with the portable communication terminal, a reading section for reading authentication information out of the portable communication terminal, an inquiry request section for sending authentication information and requesting the management apparatus to inquire the electronic prepaid information, a receiving section for receiving the electronic prepaid information, and an image forming control section for controlling whether to perform image processing.

Image forming apparatus and image forming system

An image forming apparatus provided with a bent sheet feeding guide member in the transportation path for transporting the recording material with the inclination along the width direction of the guide surface configured by the bent sheet feeding guide member being variable, or provided with a pair of transporting rollers that transports a recording material in the transportation path for transporting a recording material with the inclination of the pair of transporting rollers along the axial direction being variable with respect to the transportation surface.

An image forming apparatus providing services for general users, capable of getting rid of trouble to collect use charges. The image forming apparatus has: a connector to which a portable communication terminal is connected; a communication section for controlling the portable communication terminal connected to the connector, and controlling communication with the portable communication terminal and a management apparatus; a reading section for reading authentication information out of the portable communication terminal; an inquiry request section for sending the authentication information to the management apparatus, and requesting the management apparatus to inquire the electronic prepaid information based on the authentication information; a receiving section for receiving the electronic prepaid information replied by the management apparatus through the communication section; and an image forming control section for controlling whether to perform image forming processing or not on the basis of the electronic prepaid information.

In an image recording apparatus equipped with plural printing heads each for jetting ink drops having a photo-setting property towards a recording medium, a conveyance unit for conveying the recording medium to the printing heads, and each of plural light radiation devices for radiating light to the ink drops landed on the recording medium to harden, is arranged at the downstream side of each of the plural printing heads, one having largest light energy, which is located at the most downstream position among the plural light radiation devices is determined at least to satisfy the light energy necessary for hardening of the ink drops jetted by any one of the printing heads positioned upstream thereof, and the light energy becomes smaller gradually for every light radiation device in the order from the light radiation device at the most downstream position to those at more upstream positions.

Image forming apparatus having a plurality of printing heads

An image recording device, comprises: a recording head which discharges an ultraviolet-ray curable ink, which is cured as irradiated with ultraviolet rays; an ultraviolet light source which generates ultraviolet rays to cure the ultraviolet-ray curable ink; a first heating section which heats the ultraviolet-ray curable ink on a recording medium after an irradiation of the ultraviolet rays; a pressure section which pressurizes the recording medium after an irradiation of the ultraviolet rays; and a controller which controls the first heating section to start heating the ultraviolet-ray curable ink on the recording medium after the last discharge of the ink to an arbitrary area on the recording medium, a first predetermined time between the last discharge and the starting heat is predetermined, and controls the first heating section to heat the ultraviolet-ray curable ink within a second predetermined time.

Image recording device

An image printing apparatus including a conveyance-printing section for printing on a recording medium sheet; a first printing device including a plurality of black printing heads for jetting image-setting black ink drops onto the recording medium sheet; a second printing device including a plurality of color printing heads for jetting image-setting color ink drops onto the recording medium sheet; first light radiating devices which radiate ultraviolet rays to harden the image-setting black ink drops; and second light radiating devices which radiate the ultraviolet rays to harden the image-setting color ink drops.

Image recording apparatus

An ink jet printer for recording an image on a recording medium by jetting ink from nozzles having: an ink jet section which is provided with the nozzles; and an ink droplet detection section for detecting an impact force generated when an ink droplet jetted from the nozzles lands with a piezoelectric element, which is provided ahead in an ink droplet jetting direction from the nozzles.

Ink jet printer

An ink jet printer has an ink jet section for jetting ink from nozzles, a vibration detection section for detecting a jet failure of the nozzles, which is provided ahead in an ink droplet jetting direction from the nozzles, an ink droplet receiving section for receiving an ink droplet jetted from the nozzles, which is interposed between the nozzles and the vibration detection section, and a control section for controlling a maximum diameter of an ink droplet jetted from the nozzles when detecting a jet failure of the nozzles to be larger than that when recording an image.

An ink jet printer has: a vibration detection section to receive ink jetted from the nozzles and output a detection signal having an amplitude corresponding to a vibration generated when the ink lands; a sampling section to sample an amplitude value of the detection signal by a predetermined sampling clock signal; a storing section to store an amplitude value data of the detection signal sampled by the sampling section; a judging section to judge a jet failure of the nozzles based on the amplitude value data of the detection signal in the storing section; and a control section to control to jet the ink continuously a plurality of times with a jet drive cycle which is set by multiplying a standard drive waveform time of an ink jet signal from the nozzles by an odd number not less than five when detecting a jet failure of the nozzles.

An ink jet printer having: an ink heating device for heating an ink whose viscosity decreases as temperature increases; a printing head for jetting an ink heated by the heating device onto a recording medium; a carrying device for carrying the recording medium while supporting the recording medium to face a nozzle-plate of the printing head; and a cooling device for cooling the recording medium in an upstream side with respect to a position where an ink placed on the recording medium is cured, in a carrying direction of the recording medium by the carrying device.

This invention relates to an ink jet printer including a printing-head which discharges photo-curing ink toward a printing sheet, and a light irradiation unit which irradiates the ink landing surface of the printing sheet with light, wherein the light irradiation unit irradiates the ink landing surface by optical scanning via a reflecting member with rays having a wavelength range in which ink is cured, and an image printing apparatus having the ink jet printer.

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Sagamihara, Japan

Tetsu Sekine