Pfu Limited

Ryoichi Yasukawa

Minoru Masuda

Takayuki Umi

Shuji Hashimoto

Kiichiro Shimosaka

Satoshi Kuroda

Masanobu Hongo

Shuichi Morikawa

Satoshi Ishida

Masaya Takamori

Motoshi Shibuya

Hideyuki Okumura

Yoshito Hirai

Noriaki Yamazaki

Tomofumi Kumahashi

Hiroshi Shiraiwa

Naoto Yamaguchi

Yusuke Kasashima

A medium conveying apparatus includes a medium tray, a feed roller to feed media placed on the medium tray in order from the lower side, a brake roller located to face the feed roller, a torque limiter to control a load applied to the brake roller, and a changing member to change a limit value of a torque of the torque limiter according to a height of the media placed on the medium tray.

Medium conveying apparatus for changing torque limit value of torque limiter

A medium conveying apparatus includes a suctioner that suctions a medium of a plurality of media to a feed belt, a driver that moves the feed belt to feed the medium, a first side blower that blows air at a first airflow rate to a first end face of the medium, a second side blower that blows air at a second airflow rate to a second end face of the medium, and a controller that controls the first side blower to blow air to the first end face at a third airflow rate that is greater than the first airflow rate and the second airflow rate when the medium has not been auctioned to a first portion of the feed belt close to the first end face and has been auctioned to a second portion of the feed belt close to the second end face.

Medium conveying apparatus

A medium reversing and discharging device includes a discharger that discharges a medium in a paper discharge direction from a discharge outlet, a holder that holds and reverses the medium, and a driver that moves the holder such that when a first plane along a portion of the medium in contact with the discharge outlet does not intersect with a second plane along a portion of the medium held by the holder on a downstream side in the paper discharge direction of the discharge outlet a moving speed at which the holder moves is lower than a discharge speed at which the medium is discharged from the discharge outlet.

Medium reversing and discharging device

A medium conveying apparatus includes a driving force transmitting mechanism to transmit a driving force from a first motor to a brake roller and a pair of conveyance rollers located on the downstream side of the brake roller, and a processor to rotate the first motor forward to control so that a medium separated by the brake roller is conveyed by the pair of conveyance rollers, in a separation mode. The processor rotates the first motor backward to perform a feed operation by the brake roller and rotate the pair of conveyance rollers backward until a front edge of the medium passes through a position of the brake roller, and rotates the first motor forward to control so that the medium is conveyed by the pair of conveyance rollers after the front edge of the medium passes through the position of the brake roller, in a non-separation mode.

Medium conveying apparatus for driving brake roller and conveying roller pair by using single motor

A medium supply device includes a feeding unit that feeds a medium among one or more media placed on a placing table, a separating unit that is arranged to come into pressure-contact with the feeding unit, a blocking portion that is movable and blocks a space formed between the feeding unit and the separating unit in an upstream side of a nip region in a conveying direction of the medium, and a curve-forming portion that presses the medium against the feeding unit side to form a curve in a width direction of the medium.

Medium supply device

A document feeder includes a feed roller provided in a feed path for a document, a conveying roller provided on a downstream side of the feed roller in the feed path, and a protruding portion provided between the feed roller and the conveying roller in the feed path and protruding from a lower side of the feed path.

Document feeder

A medium supply device includes a feeding unit that feeds a medium among one or more media placed on a placing table, a separating unit that is arranged to come into pressure-contact with the feeding unit, and a blocking portion that is movable and blocks a space formed between the feeding unit and the separating unit in an upstream side of a nip region in a conveying direction of the medium. When one of the media placed on the placing table is fed by the feeding unit and the one or more media are placed on the placing table, the space is formed by the medium fed by the feeding unit, the separating unit, and the one or more media placed on the placing table.

Scanner

There are provided a paper conveying apparatus, an abnormality detection method and a computer-readable, non-transitory medium which can precisely determine whether an abnormality has occurred when paper is conveyed. The paper conveying apparatus includes a sound generator for generating a paper sound by contacting a paper, a first sound signal generator for generating a first sound signal corresponding to the paper sound, and an abnormal conveyance detector for determining whether an abnormal conveyance has occurred when the paper is being conveyed according to a detection method, wherein the abnormal conveyance detector is configured to change the detection method based on the first sound signal.

Paper conveying apparatus, abnormality detection method, and computer-readable, non-transitory medium

There are provided a paper conveying apparatus, a jam detection method and a computer-readable, non-transitory medium which can determine whether a jam has occurred based on the sound which is generated by a paper during conveyance at a low cost. The paper conveying apparatus includes an ultrasonic detector, provided near a conveyance path of a paper, for detecting an ultrasonic wave which passes through paper and outputting an ultrasonic signal, a multifeed detector for determining whether multifeed of papers has occurred based on a component of a first frequency band in the ultrasonic signal, and a sound jam detector for determining whether a jam has occurred based on a component of a second frequency band lower than the first frequency band in the ultrasonic signal.

Paper reading apparatus, jam detection method, and computer-readable, non-transitory medium

A medium feeding deviceincludes a feeding rollerwhich conveys a medium Sin a conveying direction, a brake rollerthat is arranged to press the feeding rollerwith a predetermined pressure, and a separating power generating devicewhich is connected to the brake rollerand generates rotational load in a direction counter to the conveying direction with respect to the brake roller. The separating power generating deviceincludes a torque limiterwhich generates an upper limit torque Twhich is a fixed load as a first load generating unit, and an electromagnetic brakewhich can change the generated load as a second load generating unit. The torque limiterand the electromagnetic brakeare connected in parallel to the brake roller

Medium feeding device

There are provided a paper conveying apparatus, a multifeed detection method and a computer-readable, non-transitory medium which can suppress erroneous detection of the occurrence of a multifeed. The paper conveying apparatus includes an ultrasonic detector for outputting an ultrasonic signal, a multifeed detector for determining whether a multifeed of papers has occurred based on the ultrasonic signal, a sound signal generator for generating a sound signal, and a control module for performing an abnormal processing when the multifeed detector determines that a multifeed has occurred and the sound signal generator does not output a predetermined sound signal, and determining that a multifeed has not occurred and not performing the abnormal processing when the multifeed detector determines that a multifeed has occurred and the sound signal generator outputs the predetermined sound signal.

Paper conveying apparatus, multifeed detection method, and computer-readable, non-transitory medium

Imprinter for scanner

A medium feeding deviceincludes a separating power generating devicewhich causes a brake rollerto generate a rotational load in a direction counter to a conveying direction. The deviceincludes a torque limiterwhich generates a load of a predetermined upper limit torque T, a torque limiterwhich is arranged in series with the torque limiteron a power transmission path to the brake rollerand generates a load of an upper limit torque Tsmaller than the torque T, and an electromagnetic clutchwhich switches between connection and disconnection between the power transmission path and a bypass route which bypasses the torque limiter. The devicecan change the rotational load of the brake rollerto the torque Tor the torque Tby the switching of the electromagnetic clutch

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Kahoku, Japan

Ryoichi Yasukawa