Brother Kogyo Kabushiki-Kaisha

Fumitake Tajiri

Yusuke Mizuno

Tomonori Watanabe

Tokifumi Tanaka

Sadaharu Kato

Hirotaka Imaeda

Masaki Yasuda

Tetsuya Okuno

Hideki Nogawa

Yoshihiro Itogawa

Katsunori Enomoto

Tatsuya Koyama

Sho Ogura

Terumasa Ito

Hisashi Tsukawaki

An image forming apparatus includes a developing cartridge, a drum cartridge, a casing, a connector, and a controller. The drum cartridge includes a photosensitive drum, a drum cartridge memory, a charger, and a cleaner. The charger is configured to charge the photosensitive drum and including a wire and a grid electrode. The cleaner is configured to clean the wire. The connector is configured to be electrically connected to the drum cartridge memory. Information is writable to the drum memory through the connector. The detection circuit board is configured to detect a state of discharge of the charger. The controller is configured to perform: determining whether or not the state of discharge detected by the detection circuit board is abnormal; and writing, in the drum cartridge memory, information representing occurrence of the abnormal discharge through the connector in a case where occurrence of the abnormal discharge is determined.

Image forming apparatus including drum cartridge having charger and photosensitive drum

In an image forming device, a first fixing member has a roller. A second fixing member has a belt to form a nip together with the first fixing member. A pressure modifying mechanism modifies a nip pressure at the nip to selected one of a first nip pressure and a second nip pressure smaller than the first nip pressure. A controller drives the first motor to drive the roller and fixes the developer image on a sheet in a state that the nip pressure is the first nip pressure. The controller modifies the nip pressure from the first nip pressure to the second nip pressure while driving the first motor in a case where a final sheet among one or more sheets fixed according to a print job has passed the nip, and halts the first motor after the nip pressure is modified to the second nip pressure.

Image forming device modifying nip pressure of nip formed in fixing device before motor is halted

In an image forming device, a first fixing member has a roller. A second fixing member has a belt to form a nip together with the first fixing member. A first motor drives the roller. A pressure modifying mechanism modifies a nip pressure at the nip to selected one of a first nip pressure and a second nip pressure smaller than the first nip pressure. A controller starts driving the first motor to drive the roller in a case where a print command is received in a state that the nip pressure is the second nip pressure. The controller modifies the nip pressure from the second nip pressure to the first nip pressure after the driving is performed and fixes the developer image on the sheet in a state that the nip pressure is the first nip pressure.

Image forming device including pressure modifying mechanism modifying nip pressure of nip formed between first fixing member and second fixing member

In an image-forming apparatus, a fixing device includes first and second fixing members; and a pressure modifying mechanism. The first and second fixing members form a nip. The pressure modifying mechanism modifies a nip pressure at the nip to one of a first nip pressure and a second nip pressure smaller than the first nip pressure. A controller performs: a converting process to convert print data into raster image data; an image-forming process to form a developer image on a sheet using the raster image data; and a fixing process to fix the developer image to the sheet with the fixing device at the first nip pressure. When a second converting process is not completed before a prescribed time following completion of a first fixing process has elapsed, the controller further performs a nip pressure reducing process to modify the nip pressure from the first to the second nip pressure.

Image-forming apparatus performing converting process to convert print data, image-forming process to form developer image on sheet using converted data, and fixing process to fix developer image to sheet

An electronic apparatus performs: acquiring an input file name from a removable memory connected to an interface; determining whether the input file name includes a first character string and whether the input file name includes a second character string; when the input file name includes the first character string, changing current setting information into specified setting information, the current setting information being among a plurality of setting information stored in the internal memory and corresponding to a first setting item specified by first input information, the specified setting information being included in the first input information and corresponding to the first setting item; and when the input file name includes the second character string, acquiring current setting information corresponding to a second setting item specified by second input information; and storing, in the removable memory, a file including output information indicating the acquired current setting information, as an output file.

Electronic apparatus, storage medium storing computer program, and method of performing settings of electronic apparatus

In an image-forming apparatus, a fixing device includes: a first fixing member; a heater; a motor; a second fixing member; and a pressure modifying mechanism. The second fixing member forms a nip together with the first fixing member. The pressure modifying mechanism modifies a nip pressure at a nip to one of a first nip pressure and a second nip pressure smaller than the first nip pressure. In a first case where a sheet jam occurs in the image-forming apparatus and no sheet exists in the nip, a controller performs: reducing the nip pressure from the first nip pressure to the second nip pressure; and halting rotation of the first fixing member after completed the reducing. In a second case where a sheet jam occurs in the image-forming apparatus and a sheet exists in the nip, the controller performs: the halting; and the reducing after completed the halting.

Image-forming apparatus provided with fixing device including first fixing member, second fixing member, and pressure modifying mechanism modifying nip pressure of nip formed therebetween

A controller of an image forming apparatus executes acquisition processing of acquiring an area of an image which exists in a predetermined region of a first page where a developer image is first to be formed, heating processing of heating a heating member such that a temperature of the heating member reaches a fixing temperature, and feeding processing of starting feed of a sheet to a process unit after a predetermined period of time elapses from a predetermined timing after a start of print processing. The predetermined region is laid at both end portions in a width direction of the first page. In a case where the area of the image is equal to or smaller than a predetermined value, the controller sets the predetermined period of time in the feeding processing shorter as compared with a case where the area of the image is larger than the predetermined value.

Image forming apparatus

A controller calculates a first time period Tand a second time period T. The first time period Tis defined as a time period required for conveying the end portion of the sheet, which is conveyed in a first conveyance direction E, disposed on the upstream side in the first conveyance direction E up to a reversal position A. The second time period Tis defined as a time period required for conveying an end portion of the reversed sheet disposed on an upstream side in a second conveyance direction R from the reversal position Ato a branching point A

Image processing apparatus

An image forming device has a heating member, a thermal detecting unit, and a control unit. The heating member is positioned at an ambient temperature and heated by a heat source. The heating member fixes a developed image to a recording sheet. The thermal detecting unit is provided separately from the heating member. The thermal detecting unit detects a first temperature. The control unit uses a function to calculate a second temperature of the heating member on the basis of the detected first temperature. The control unit controls the heat source on the basis of the second temperature. The function has a rate of change that increases with decreasing the ambient temperature.

Image forming device having function for controlling temperature of heating member

An image forming apparatus includes a first paper feed discharge unit which feeds and discharges a recording medium; a second paper feed discharge unit which is formed with an opening and which feeds and discharges the recording medium via the opening; an image forming section which forms an image on the recording medium fed from the first paper feed discharge unit and the second paper feed discharge unit; a first transport mechanism which transports the recording medium from the first paper feed discharge unit to the image forming section; a second transport mechanism which connects the second paper feed discharge unit and the first transport mechanism and which transports the recording medium; a paper feed unit which feeds the recording medium or a storage type recording medium having a storage unit; a transport control unit which controls the first and second transport mechanisms.

In an image forming apparatus, a temperature of a heating member heated by a heat source to fix a developer image on a recording sheet is detected by a temperature sensor disposed apart from the heating member. A controller controls the heat source based upon a temperature determined mathematically by application of a specific function to the temperature detected by the temperature sensor. In the controller, the specific function is switched among a plurality of functions according to a control mode which is switchable among a plurality of modes and in which operation of the heat source is regulated.

Growing community of inventors

Nagoya, Japan

Fumitake Tajiri