Canon Kabushiki Kaisha

Takuro Mita

Takashi Kuwata

Hideki Ohta

Takamichi Matsuo

Youhei Suzuki

Kenji Abe

Nobutoshi Sugai

Tomoo Akizuki

Taro Ishifune

Takateru Okubo

A post-processing apparatus includes a conveyance path, a buffer unit, a post-processing unit, and a processor. The conveyance path receives a sheet conveyed from a conveyance apparatus in a stage preceding the post-processing apparatus. The buffer unit forms a sheet bundle constituted by sheets. The post-processing unit loads the sheet bundle performs post-processing on the sheet bundle. The processor controls conveyance of the sheets and the sheet bundle and obtains, in a case of a delay amount, a delay amount of the sheet conveyed from the conveyance apparatus in the stage or a delay amount of a preceding other sheet bundle conveyed from the buffer unit to the post-processing unit. The processor sets a shift amount between plural sheets based on the delay amount obtained by the at least one processor.

Method for conveying sheet in post-processing apparatus

A sheet discharging apparatus includes a stacking portion, a first conveyance portion, a detection portion, a second conveyance portion, a third conveyance portion, and a control portion. The control portion is configured to execute a discharge operation by causing the sheet discharging apparatus to reverse a conveyance direction of a first sheet conveyed from the first conveyance portion to the second conveyance portion and deliver the first sheet to the third conveyance portion by using the second conveyance portion, convey the first sheet toward the second conveyance portion by the third conveyance portion, and discharge the first sheet and the second sheet to the stacking portion by using the second conveyance portion in a state where the first sheet and the second sheet are superimposed on each other.

Sheet discharging apparatus, sheet processing apparatus, and image forming system

A sheet processing apparatus includes a first sheet conveyance path, a second sheet conveyance path that branches from the first sheet conveyance path at a branch portion on the first sheet conveyance path and merges with the first sheet conveyance path at a merging portion, and a control unit. The control unit controls a guide unit so as to guide a first sheet conveyed first in the sheet bundle to be processed by a sheet processing unit to the second sheet conveyance path, and guide a second sheet following the first sheet to the first sheet conveyance path to merge the first and second sheets in an overlapping manner at the merging portion, and guide at least one of sheets following the second sheet among a plurality of sheets constituting the sheet bundle to the second sheet conveyance path.

Sheet processing apparatus and image forming system

An image forming apparatus includes a sheet feed unit which feeds a sheet to an image forming unit forming an image on the sheet, a re-transport roller which reverses the sheet with a toner image fixed on the sheet and re-transports the sheet to the image forming unit, and a control unit which controls a sheet feed operation of the sheet feed unit for feeding the sheet. As the temperature of the re-transport roller sensed by the temperature sensing unit is decreased, the control unit retards the timing at which the sheet feed unit starts the sheet feed operation when a duplex image formation in which the image is formed on both sides of the sheet is performed after a one-side image formation is completed.

Image forming apparatus

To provide an image forming apparatus and a control method for the same, with which an adjustment for satisfying an image quality is performed without fail while an execution frequency of the adjustment can be changed, for example, an unnecessary adjustment can be skipped. The image forming apparatus includes: a controller for issuing a plurality of commands; an engine for executing image formation according to the command; a control portion for holding a condition status indicating an internal condition of the engine and a factor status indicating a factor of the condition status, or the factor status and notifying, in response to the command, the condition status and the factor status, or the factor status; and a judgement unit for judging whether to adjust an image formation condition of the engine or not according to the condition status and the factor status, or the factor status.

Printer engine having a judgment unit and a control unit that transmits to a controller

An image forming apparatus receives a command from a controller for issuing commands representative of a plurality of kinds of instruction, and executes an image formation according to the command. The image forming apparatus includes a necessity judgment unit, which judges a necessity of an adjustment of an image formation condition based on a state of an inside of the apparatus, and a control unit, which transmits to the controller a request for executing the adjustment of the image formation condition based on a judgment of the necessity judgment unit, and factor information according to a factor of the request for executing the adjustment of the image formation condition. The controller performs an issue control of an execution command for instructing an execution of the adjustment of the image formation condition based on the request for executing the adjustment of the image formation condition and a kind of the factor information transmitted from the control unit.

Image forming apparatus having a function of adjusting an image formation condition

The image forming apparatus having: a rotatable first image bearing member of bearing images; a rotatable second image bearing member of bearing images; and a transferring device for transferring images respectively born by the first image bearing member and the second image bearing member onto a recording material; wherein a first mode with the first image bearing member and the second image bearing member coming in contact with the transferring device so that images are formed respectively onto the first image bearing member and the second image bearing member and a second mode with the first image bearing member and the transferring device being set apart and the second image bearing member coming in contact with the transferring device so that an image is formed onto the second image bearing member are executable; and wherein, at the second mode, the first image bearing member starts rotation from a rotation stopped state and thereafter rotation stops. Thereby an image bearing member can be restrained from contacting recording material or transferring device to get deteriorated.

Growing community of inventors

Numazu, Japan

Takuro Mita