Abstract:
An image forming apparatus has a sheet processing unit for feeding a cover sheet and a folder for folding the cover sheet with a bundle of recording sheets. The sheet processing unit has a cover sheet feeder for feeding a cover sheet facing upward toward an image forming unit, a reversing unit for reversing the cover sheet so that the cover sheet faces downward, and a conveyor for conveying the reversed cover sheet to the folder in a switchback manner so that the front face of the cover sheet faces the folding roller pair. The folder has a thrusting member for thrusting the bundle of sheets toward the folding roller pair and discharging the folded bundle to a discharge tray.
Abstract:
A sheet processing apparatus is provided, which is capable of achieving high quality processing and maintaining high productivity without giving rise to problems such as sheet jam or damage of sheets even when various sheets having different attributes are conveyed. A buffer roller 505 is inhibited from carrying out a sheet staying operation in accordance with the type of sheets conveyed from an upstream side of the apparatus, to be conveyed to a downstream side of the apparatus via the buffer roller 505.
Abstract:
An image forming apparatus has a sheet processing unit for feeding a cover sheet and a folder for folding the cover sheet with a bundle of recording sheets. The sheet processing unit has a cover sheet feeder for feeding a cover sheet facing upward in a first direction, a reversing unit for reversing the cover sheet so that the cover sheet faces downward, a conveyer for conveying the cover sheet in a second direction opposite the first direction and then conveying the cover sheet to the folder in the first direction. The folder has a thrusting member for thrusting the bundle of sheets toward the second direction and a folding roller pair for folding the bundle thrust by the thrusting member and discharging the folded bundle in the second direction.
Abstract:
An image processing apparatus includes a processing unit for processing an image signal into which an original document, after being exposed to light, is photoelectrically converted, a compression module for compressing image information processed through the processing unit, a memory for storing image data compressed by the compression module, a control unit for setting a diversity of image processing modes, and a predicting module for predicting an image compression rate used by the compression module. The predicting module predicts the image compression rate of an image after being processed according to the image processing mode set by the control unit.
Abstract:
The output of a butterfly unit is entered into a product-sum unit in a forward DCT and the output of the product-sum unit is entered into the butterfly unit in an inverse DCT. The product-sum unit employs, as a bit-string distribution circuit, a register circuit having eight bit shift registers each having a 16-bit parallel input and a 2-bit shift output and the bit shift registers are different in bit width from one another. Data are entered into the bit shift registers with the largest bit-width bit shift register first, such that the respective bit shift registers are shifted rightward by 2 bits per cycle. Four shift registers are disposed between the bit-string distribution circuit and a RAG circuit such that, when bit strings are entered, as delayed cycle by cycle, into eight RAGs of the RAC circuit, the final accumulation results are successively provided from the RACs in a proper order. This reduces the bi-directional DCT processor in circuit arrangement.
Abstract:
After the start of an image formation operation, feeding of a sheet on which an image is to be formed is started, and an image formed on an image carrier is transferred onto the fed sheet. On the other hand, after the start of the image formation operation, in a case that the sheet has not been detected within a predetermined time period in a predetermined position on the upstream side of a transfer position, transfer is stopped, and after the stoppage of the transfer, re-feeding of the sheet is performed. By the re-feeding, in a case that the sheet has been detected in the predetermined position, formation of an image to be transferred onto the sheet is started, then the timing of start of the feeding of the sheet is delayed from the timing of start of the feeding in normal times.
Abstract:
An image forming apparatus capable of efficiently performing an image forming processing even in a case where a post-processing apparatus performs a post-processing during a both-sides printing. A first time period needed by a first both-sides image forming processing and a second time period needed by a second both-sides image forming processing are computed in a case where a post-processing unit performs a post-processing on a recording sheet formed images on both sides thereof. The first time period and the second time period is compared, and any one of the first both-sides image forming processing and the second both-sides image forming processing is selected based on the comparison.
Abstract:
There is provided an image forming system that are capable of preventing a user or operator from forgetting to carry out a maintenance operation based on required sub-maintenance items after execution of a maintenance operation based on an associated maintenance item, such as component replacement, cleaning, or adjustment. A table of maintenance items and sub-maintenance items associated with respective ones of the maintenance items is stored in a ROM. When a CPU determines that a maintenance operation based on a selected one of the maintenance items has been completed, the CPU determines whether or not there is any sub-maintenance item associated with the selected maintenance item, by referring to the table. When it is determined that there is one or more sub-maintenance items associated with the selected maintenance item, a CPU provides control to display the sub-maintenance item or items in an operating/display unit.
Abstract:
An image forming apparatus to which a developer container is detachably mountable includes a receiving unit configured to receive, via wireless communication, temperature information detected by a temperature detecting unit, which is disposed in a developer container, from the developer container in a state not mounted to the image forming apparatus. The image forming apparatus further includes a determining unit configured to determine, based on the temperature information received by the receiving unit, whether an oscillating unit disposed in the developer container is to be oscillated, and a transmitting unit configured to transmit a signal for oscillating the oscillating unit to the developer container via wireless communication based on a determination result of the determining unit indicating that the oscillating unit is to be oscillated.
Abstract:
This invention provides an image forming apparatus capable of shortening the user's print waiting time as much as possible when it is determined that image adjustment is necessary during the image forming operation, and a control method therefor. To accomplish this, in a color image forming apparatus including a plurality of image forming stations which form toner images with a plurality of toners on the basis of a job, it is discriminated whether adjustment processing is necessary during a continuous image forming operation based on the job. If it is discriminated that adjustment processing is necessary, it is determined whether each of the image forming stations has a non-operating time enough to execute the discriminated adjustment processing during the image forming operation. The image forming station determined to have a non-operating time enough to execute adjustment processing executes the discriminated adjustment processing during the non-operating time.