30results about How to "Shorten FPOT" patented technology

An image heating apparatus for heating a recording material, on which a toner image is carried, while conveying the recording material in a nip includes: a fixing roller including a metal core, a heat insulating layer formed on a surface of the core metal, and a high heat transfer layer which is formed on an outer peripheral surface of the heat insulating layer and has a higher thermal conductivity than the heat insulating layer; a heating member for heating the fixing roller from an outside; and a back-up member for forming the nip together with the fixing roller. When the fixing roller and the back-up member opposing the fixing roller are supplied with the same heat quantity, the temperature rise rate in a neighborhood of the surface of the back-up member supplied with the heat quantity is higher than that of the fixing roller.

A printing apparatus sets, as time for performing pre-processing before performing print processing, first time if the printing rate calculated by the calculation unit is smaller than a predetermined value, and second time that is longer than the first time if the printing rate calculated by the calculation unit is larger than the predetermined value.

In a fixing apparatus having a heater that can selectively heat a plurality of heating blocks, which are divided in the longitudinal direction of a substrate, an power supply control portion corrects the amount of current to be supplied to a plurality of heat generating elements, based on the temperatures detected by each of a plurality of temperature detecting portions, so that a difference of a temperature rising amount per unit time among the heating blocks becomes small when the fixing apparatus starts up.

There is provided an ink-jet printer including: a conveyer, a recording head, an ink receiver, a communicating interface and a controller. Under a condition that the controller receives a preceding command, the controller is configured to execute a first flushing processing; and under a condition that an elapsed time, elapsed after completion of the first flushing processing and until receipt of a recording command is not less than a threshold time in a case that the controller receives the recording command, the controller is configured to execute a second flushing processing and a recording processing, whereas under a condition that the elapsed time is less than the threshold time, the controller is configured to execute the recording processing without executing the second flushing processing.

An image heating apparatus includes a heater having a plurality of resistors, and a power supply control circuit that controls power supplied to the plurality of resistors so as to selectively heat a plurality of heating regions. A plurality of thermistors detect a temperature of each of a plurality of regions of the image heater, and a processor functions as a current amount correcting portion that corrects an amount of current supplied to the plurality of resistors. The current amount is corrected based on the temperature detected by each of the plurality of thermistors, so that a difference of a temperature rising amount per unit time among the plurality of heating regions at the start of an image heating operation becomes small and a total amount of power supplied to the plurality of heat generating elements is kept to within a predetermined limited power amount.

An image forming apparatus includes an opening, an openable member, and a movable member for supporting cartridges in a state in which the cartridges are arranged in an arranging direction, movable in the arranging direction while passing through the opening between an inside position and an outside position in a direction crossing the arranging direction and a longitudinal direction. When the movable member is positioned at the inside position, adjacent two cartridges of the cartridges are in an overlapping state as seen in a direction perpendicular to the arranging direction and the longitudinal direction. When the movable member is moved from the inside position to the outside position and then one of the adjacent two cartridges is dismounted from the movable member, the one of the adjacent two cartridges is moved relative to the movable member so as to be prevented from interfering with the other cartridge.

An image forming apparatus includes a movable member movable between first and second inside positions and between the second inside position and an outside position, supporting cartridges arranged in an arranging direction. At the outside position, the cartridges are detachably mountable outside a main assembly of the image forming apparatus in a direction crossing with the arranging direction and with a longitudinal direction of each cartridge. At the first inside position, the cartridges are positioned inside the main assembly. The second inside position is inside the main assembly partway of a movement path between the outside position and the first inside position. The movable member supports the cartridges so that a distance between adjacent two cartridges of the cartridges is increased with respect to the arranging direction in interrelation with movement of the movable member from the first inside position to the second inside position.

There is provided an ink-jet printer comprising: a recording head, an electric power supply, and a controller which is configured: to determine an ink amount in which an ink is jetted by the recording head in a flushing processing; in a case that the determined ink amount is less than a first ink amount, to boost a driving voltage of the electric power supply to a target voltage value, in accordance with a predetermined first voltage boosting pattern; and in a case that the determined ink amount is not less than the first ink amount, to boost the driving voltage to the target voltage value, in accordance with a predetermined second voltage boosting pattern in which a voltage boosting time is shorter than that in the first voltage boosting pattern. Accordingly, it is possible to shorten FPOT while reducing the load on the constitutive elements of the ink-jet printer.

An image forming apparatus includes an image forming portion, a fixing portion, a temperature detecting portion, a measuring portion, a storing portion, and a controller. The controller is capable of setting a case that a start of feeding of a recording material is permitted after a lapse of a predetermined time need to measure a temperature rising rate of the fixing portion and a case that the start of feeding of the recording material is permitted, depending on a value relating to the temperature rising rate stored in the storing portion, at timing before the lapse of the predetermined time.

A color image forming apparatus includes one image bearing member, an image forming unit configured to successively form images with toners in plural different colors on the image bearing member per color, a revolving intermediate transfer member, and a transfer unit configured to successively transfer the images on the image bearing member onto the intermediate transfer member in a superimposed relation in a transfer section. Images are transferred in a superimposed relation by executing control such that, when formation of the next image is not started at a due timing of starting the formation of the next image, a timing at which transfer is started after the formation of the next image and a timing at which a leading end of the previously transferred image reaches the transfer section are matched with each other by temporarily changing the revolving speed of the intermediate transfer member or stopping it.

An image forming apparatus, having process cartridges each including a photosensitive drum and a developing roller, includes a movable member movable between an inside and an outside of a main assembly of the image forming apparatus in a movement direction crossing a longitudinal direction of the photosensitive drum, and a mounting portion for supporting the process cartridges, wherein the process cartridges are detachably mountable to the mounting portion from a direction crossing the longitudinal direction and the movement direction. In addition, and an interrelating member, movable in interrelation with movement of the movable member, moves the developing roller relative to the photosensitive drum so that a distance between a rotation center of the photosensitive drum and a rotation center of the developing roller is decreased with respect to the movement direction when the movable member is moved from the inside to the outside of the main assembly.

There is provided an ink-jet printer including: a recording head; a power supply; and a controller. In a case that the controller obtains a maintenance instruction, the controller performs: boosting driving voltage to a target voltage value, in accordance with a first pattern; and applying the driving voltage to at least one of driving elements. In a case that the controller obtains an image recording instruction, the controller performs: boosting the driving voltage to the target voltage value, in accordance with a second pattern having a voltage boosting time shorter than the first pattern; and recording an image on a sheet by selectively applying the driving voltage, boosted to the target voltage value, to the driving elements.

There is provided an ink-jet printer including a conveyer, a recording head, a carriage, an ink receiver and a controller. The controller executes: receiving a recording instruction; determining an ink amount to be jetted in a flushing process; moving the carriage in a first orientation up to a returning position corresponding to the ink amount; moving the carriage in a second orientation opposite to the first orientation from the returning position to a sheet facing area; executing a flushing processing; and executing recording. The returning position is located at a first position downstream from the sheet facing area in the first orientation, under a condition that the determined ink amount is less than a threshold value; and the returning position is located at a second position downstream from the first position in the first orientation, under a condition that the determined ink amount is not less than the threshold value.

A fixing unit includes a changing portion configured to change a state of a first rotary member and a second rotary member between a first pressurization state and a second pressurization state. A control portion is configured to control the driving source and the changing unit and capable of performing first control that causes the driving source to rotate the first rotary member and then stop the first rotary member, while continuing the first pressurization state from a last image forming operation, and second control that causes the changing portion to change the state of the first rotary member and the second rotary member from the first pressurization state to the second pressurization state.

There is provided an image recording apparatus including a carriage, a head, a velocity sensor, and a controller. The controller obtains velocity data of the carriage from the velocity sensor, determines a threshold value based on the velocity data, records an image on a recording medium, and suspends a recording pass when the controller has determined that a velocity indicated by the velocity data is lower than a velocity corresponding to the threshold value. The controller can execute a first recording mode and a second recording mode in which the velocity of the carriage is faster than that of the first recording mode. The velocity data for the first recording mode is obtained in a warm-up time after a recording command is received until recording of the image is started. The velocity data for the second recording mode is obtained in other time other than the warm-up time.

A stream printing method implemented in a print server and a printer for handling printing of large files. The print server divides the input data file into a plurality of data chunks, and transfers them sequentially to the printer. The printer sequentially rips the data chunks and prints them. The print server dynamically monitors the system performance factors to measure, for each data chunk, the time required to extract the data chunk from the data file, the time required to transfer the data chunk to the printer, the time required to rip the data chunk, and the time required to print the data chunk. The sizes of the data chunks are calculated using these performance factors and the chunk size of a previous data chunk.

An image forming apparatus includes an image forming portion, a fixing portion, a temperature detecting portion, a measuring portion, a storing portion, and a controller. The controller is capable of setting a case that a start of feeding of a recording material is permitted after a lapse of a predetermined time need to measure a temperature rising rate of the fixing portion and a case that the start of feeding of the recording material is permitted, depending on a value relating to the temperature rising rate stored in the storing portion, at timing before the lapse of the predetermined time.