Sharp Kabushiki Kaisha Corporation

Michiaki Nishimura

Naoyuki Kamei

Sohichi Yoshimura

Junichi Kajiwara

Yoshifumi Maitani

Yukinari Sato

Masanobu Deguchi

Takahiro Fukunaga

Hideaki Hagihara

Masakiyo Okuda

Masakazu Suzuki

Kazuya Masuda

Shinji Kato

Kiwamu Morita

Yoshinori Hayashi

Noritomo Nakashima

Souichi Takata

Shinichiro Hiraoka

Takahiro Minami

Hiroki Kinoshita

Yoshio Mizuyama

Kouichi Etoh

Hiroki Etoh

Takehiro Kato

An image forming apparatus includes: an operation acceptor; a transporter transporting paper along a transport path; an image former forming an image on the paper on the basis of image data; a paper detector detecting a transport status of the paper on the basis of detection results of paper detection sensors provided at various locations on the transport path; a display; a storage storing a predetermined image showing an assumed jam status of the paper and predetermined guidance for clearing the jam status of the paper when a jam occurs while the paper is transported; and a controller. When the jam occurs while the paper is transported, the controller displays, in a user-selectable manner, a predetermined image showing the paper jam status according to the detection result of the paper detector. When the operation acceptor accepts a selection operation, the controller displays the guidance for clearing the paper jam status.

Image forming apparatus

An image forming apparatus includes one or more controllers that control reading of a plurality of documents, an image processing, a printing, and a post-processing, wherein in a case where the post-processing is set, and when a main scanning direction size is alignable to a main scanning direction size of one of the documents by applying, to an image of each document, at least one of image processing among rotation in the unit of 90 degrees, enlargement/reduction, and margin increase/decrease adjustment, the controller allows to perform the post-processing by aligning the main scanning direction size of each image with respect to the alignable size as a reference size.

Image forming apparatus and image forming method

In an image forming apparatus, guidance information is stored in advance for guiding an optimal operation procedure for execution of a job, and the guidance information is displayed on a display portion based on operation input that is input to an input portion in order to execute a job of image formation. For example, a device control portion compares operation input that is input to the input portion in order to execute the job of image formation to the guidance information corresponding to the job executed by the operation input, and causes the display portion to display the guidance information in a case where an actual frequency of operation input is greater than a frequency of operation input that is specified in an operation procedure of the guidance information.

Image forming apparatus with enhanced display of guidance information

The image forming apparatus includes: an image processor; an image forming portion for forming images on recording paper based on the image data output from the image processor; a folding mechanism for folding the recording paper with images formed by the image forming portion when the input image information is confidential image information; and a stapling mechanism for binding the recording paper folded by the folding mechanism, at the end part when the input image information is confidential image information. When the input image information is confidential image information, the image processor outputs the pouch-binding image data for a pouch-bound image to be formed on the facing pages of the recording paper that is folded by the folding mechanism, by editing the layout of the confidential image.

A CPU includes a bus interface, a control unit, an instruction cache, a data cache, a secondary cache, an instruction decoder, an arithmetic unit, and registers. When operations can be performed only with the cache, the CPU inhibits access to external memory and stops power supply to the external memory. With this arrangement, by performing operations in the CPU without using the external memory, it is possible to realize a speedy processing and to stop power supply to the external memory, thus allowing for reduction in power consumption.

CPU, information processing device including the CPU, and controlling method of CPU

In the correction of the quantity of light of a light source used in an image reader which irradiates an original document with the light source, receives the reflected light by a CCD and reads the original document image, at the time of a document moving mode in which the document moves, correction of the quantity of irradiation light of the light source is performed by reading a first standard white board which extends over the whole area in the main scanning direction, prior to the initiation of readout of the moving document, and upon initiation of readout of the moving document, a second standard white board arranged outside the document passing area is read by using the same light source, with the read operation of the moving document, and correction of the quantity of irradiation light of the light source is performed based on the reflected light from the second white board.

Image reader and method for correcting the quantity of light source

A printing apparatus includes a print head section having a nozzle for discharging ink; a paper feed section for feeding paper in a paper feed direction; a movement section for reciprocally moving the print head along a track formed in a direction perpendicular to the paper feed direction; a maintenance section for performing a maintenance operation on the nozzle; a case for accommodating the above-mentioned sections; a cover attached to the case in an openable and closable manner; a detection section for detecting open and closed states of the cover and outputting detection signals representative of the open and closed states of the cover; and a control section for controlling drive of the movement section and the maintenance section according to the detection signals output by the detection section. The maintenance section includes two maintenance stations mounted on both ends of the track, and the control section gives an instruction such that the print head moving to one of the maintenance stations is stopped at a stop position established on the track, in response to the detection signal representative of the open state of the cover.

Printing apparatus

A document is fed from a document tray to a reading station. When the document after being read is discharged by way of a discharge path, the document is halted by a control roller for discharging, instead of being discharged completely. That is, the document is discharged only when the read image is recorded on a sheet and the sheet after recording is discharged completely. When the sheet is not discharged and hence an anomaly is detected, the document set on standby at the discharge position is conveyed along an inverting path and conveyance path to a document registration roller in order to allow the document to be fed to the reading station with its image face presented on the reading position.

Document feeder for an image forming apparatus

An automatic document feeder for a copier has the position for reading the image of an original fed by the automatic document feeder disposed near the rear edge of the original table of the copier. In this automatic document feeder, essential parts such as a pickup roller, etc., for feeding originals to the reading position of the original table are arranged concentratedly on the rear side of the copier. Therefore, the center of gravity of the automatic document feeder resides near the rear side of the copier. This automatic document feeder is hinged at the rear side of the copier so as to cover the top surface of the original table in an openable and closable manner. Accordingly, the automatic document feeder is opened and closed with respect to the top of the copier, at a pivot which resides on the rear side near the center of gravity thereof.

Copier with an automatic document feeder

The control circuit includes: a series circuit of a first triac and a reactor; and a second triac in parallel with this series circuit so as to perform control of activation of a fixing heater. Since the fixing heater has a low resistance when the power switch is first turned on, the first triac is operated to perform phase angle control of current flow, and when the phase angle has become approximately equal to 180.degree., the first triac is stopped, at the same time the second triac starts to be operated. The switching from the first triac to the second triac is made quickly so that it is possible to reduce the power consumption from the reactor.

Heater control device using phase angle control

A document feeder includes: a document detecting device arranged on the top of the copier body, for detecting a document inserted from the outside; a feed roller arranged adjacent to the document detecting device, on the top of the copier body, for feeding an inserted document into a space between the original table and the original cover, in response to the detection of a document by the document detecting device; and an original cover lifting device arranged on the top of the copier body, for lifting the original cover to create a gap between the original table and the original cover, in response to the detection of a document by the document detecting device. Alternatively, the feed roller further has a rotary cam on its shaft, so that the cam rotates to lift the original cover up as the feed roller rotates in the document feeding direction. Then, after the document is fed in place, the feed roller is reversely rotated in a constant time, whereby the document cover is sunk to press the document onto the original table.

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Osaka, Japan

Michiaki Nishimura