Abstract: A copolymer containing a repeating unit having a dioxopyrrole condensed ring skeleton and a repeating unit having a dithieno condensed ring skeleton and also having a specific substituent is provided.

Abstract: An inkjet recording apparatus may include a conveyor belt, suction unit, linear recording heads, and head frame shaped like a plate. The conveyor belt has a placement face on which a recording medium is placed and may be configured to cause the placement face to move in a conveyance direction. The suction unit disposed below the placement face applies a suction force exerted by a downward airflow to the recording medium placed on the placement face. The linear recording heads may be disposed upward opposite to the suction unit across the conveyor belt, have a nozzle face where an ink ejection nozzle is formed, and extend in a direction orthogonal to the conveyance direction. Linear recording heads may be arranged in the conveyance direction. The linear recording heads may be attached to the head frame. The head frame may have a ventilation opening penetrating in a thickness direction.

Abstract: A copolymer containing a repeating unit having a dioxopyrrole condensed ring skeleton and a repeating unit having a dithieno condensed ring skeleton and also having a specific substituent is provided.

Abstract: A recovery mechanism for a recording head includes a wiper and a drive mechanism. The recovery mechanism performs a residual ink attachment operation of attaching residual ink from a tip of the wiper at a first position. After the residual ink attachment operation, the recovery mechanism performs an ink wiping operation of wiping away the residual ink and purged ink by moving the wiper along an ink discharge surface toward the first position from a second position at an opposite side of a nozzle region relative to the first position.

Abstract: The invention addresses a problem of obtaining a conjugated polymer having a higher molecular weight through coupling reaction of monomers using a transition metal catalyst. The invention relates to a method for producing a conjugated polymer, which comprises polymerizing one or more monomers through a coupling reaction, wherein the coupling reaction of the monomer is carried out by using one or more kinds of homogeneous transition metal complex catalysts and one or more kinds of heterogeneous transition metal complex catalysts in combination.

Abstract: A recording head recovery mechanism has a wiper, a drive mechanism, and a controller. The controller can perform recording head recovery operation including a residual ink sticking step of letting residual ink at the tip of the wiper stick to a first position, and a wiping step of, after the residual ink sticking step, moving the wiper across an ink ejection surface from a second position, which is a position opposite from the nozzle region with respect to the first position, in a first direction toward the nozzle region to wipe off the residual ink along with purged ink.

Abstract: A plurality of suction holes are formed in a conveyance belt of a conveyor device. A suction unit is arranged on one of surfaces of the conveyance belt. The suction unit includes a unit case in which cells adjacent in a paper conveyance direction are formed and defined by a partition wall extending in a width direction of the conveyance belt, a ceiling wall interposed between the unit case and the conveyance belt, and a fan provided in each of the adjacent cells. The ceiling wall includes a slit group which communicates the respective adjacent cells with the plurality of suction holes. The slit group includes a plurality of slits formed across the partition wall. The plurality of slits formed across the partition wall include slits in communication with one of the adjacent cells and slits in communication with the other of the adjacent cells.

Abstract: Multiple suction holes are formed in a conveyance belt of a conveyor device. A suction unit is arranged on one of surfaces of the conveyance belt. The suction unit includes a unit case. The unit case includes a plurality of cells arranged side by side in the width direction of the conveyance belt and in a conveyance direction of paper. A fan is provided in each of the plurality of cells.

Abstract: A conveyor device includes a support portion in which a through hole is formed and which is configured to support a to-be-conveyed medium; a negative pressure chamber configured to cause negative pressure to act on the to-be-conveyed medium through the through hole to suck the to-be-conveyed medium to the support portion; and a conveyance section configured to convey the to-be-conveyed medium sucked to the support portion. The negative pressure chamber includes a wall in which a communication hole to communicate the negative pressure chamber with the air is formed. The conveyor device further includes a shutter configured to slide on the wall of the negative pressure chamber to open/close the communication hole.

Abstract: A copolymer containing a repeating unit having a dioxopyrrole condensed ring skeleton and a repeating unit having a dithieno condensed ring skeleton and also having a specific substituent is provided.

Abstract: An inkjet recording device includes a recording head, a head driving unit, and a controller. A selector of the head driving unit performs selection for individual nozzles so that when the drive waveform selection data for printing one line at this time sent from a data processing section indicates that the number of times of ink ejection is 0, and drive waveform selection data for printing the next one line indicates that the number of times of ink ejection is 0, drive voltage according to none of one or more drive waveforms for ink ejection or a drive waveform for meniscus oscillation is applied to a piezoelectric element.

Abstract: The invention addresses a problem of purifying a monomer to be a precursor according to a simpler and milder method so as to obtain a polymer having a higher molecular weight. The invention relates to a method for producing a condensed polycyclic aromatic compound having n active groups (wherein n is an integer of 1 or more and 4 or less), which comprises bringing a composition containing the condensed polycyclic aromatic compound and a solvent into contact with zeolite.

Abstract: The invention addresses a problem of obtaining a conjugated polymer having a higher molecular weight through coupling reaction of monomers using a transition metal catalyst. The invention relates to a method for producing a conjugated polymer, which comprises polymerizing one or more monomers through a coupling reaction, wherein the coupling reaction of the monomer is carried out by using one or more kinds of homogeneous transition metal complex catalysts and one or more kinds of heterogeneous transition metal complex catalysts in combination.

Abstract: A conveyor device includes a support portion in which a through hole is formed and which is configured to support a to-be-conveyed medium;a negative pressure chamber configured to cause negative pressure to act on the to-be-conveyed medium through the through hole to suck the to-be-conveyed medium to the support portion; and a conveyance section configured to convey the to-be-conveyed medium sucked to the support portion. The negative pressure chamber includes a wall in which a communication hole to communicate the negative pressure chamber with the air is formed. The conveyor device further includes a shutter configured to slide on the wall of the negative pressure chamber to open/close the communication hole.

Abstract: Multiple suction holes are formed in a conveyance belt of a conveyor device. A suction unit is arranged on one of surfaces of the conveyance belt. The suction unit includes a unit case. The unit case includes a plurality of cells arranged side by side in the width direction of the conveyance belt and in a conveyance direction of paper. A fan is provided in each of the plurality of cells.

Abstract: A plurality of suction holes are formed in a conveyance belt of a conveyor device. A suction unit is arranged on one of surfaces of the conveyance belt. The suction unit includes a unit case in which cells adjacent in a paper conveyance direction are formed and defined by a partition wall extending in a width direction of the conveyance belt, a ceiling wall interposed between the unit case and the conveyance belt, and a fan provided in each of the adjacent cells. The ceiling wall includes a slit group which communicates the respective adjacent cells with the plurality of suction holes. The slit group includes a plurality of slits formed across the partition wall. The plurality of slits formed across the partition wall include slits in communication with one of the adjacent cells and slits in communication with the other of the adjacent cells.

Abstract: An image forming method for use in an inkjet head includes a pressure chamber filled with ink, a nozzle which communicates with the pressure chamber and in which a meniscus of the ink is formed, a piezoelectric element which pressurizes the pressure chamber, and a drive circuit which performs an operation of ejecting the ink in a printing state and generates a basic pulse for vibrating the meniscus in a non-printing state. The basic pulse is generated by turning off a voltage applied to the piezoelectric element for substantially the same period as a natural vibration period of the ink. An additional pulse is generated at least once before or after the basic pulse when the basic pulse is generated by the drive circuit in the non-printing state. The additional pulse is generated by turning off the voltage applied to the piezoelectric element.

Abstract: The present invention teaches and claims an image forming apparatus comprising: an image forming portion including one or more inkjet heads for forming an image on a recording medium by discharging ink from an ink discharge surface of the inkjet head; a recording medium transporting portion having a transport surface which is positioned below the ink discharge surface and on which the recording medium is placed for transporting a sheet to a position facing the ink discharge surface; a moving mechanism for moving the transport surface toward and away from the ink discharge surface; an ink discharge surface protecting mechanism including but not limited to a cap member and a driving device for moving the cap member; and a control unit for moving the transport surface away from the ink discharge surface to operate the ink discharge surface protecting mechanism when the recording medium is jammed during transportation of the recording medium.

Abstract: An inkjet recording apparatus is provided, which includes a plurality of recording heads that record an image on a recording medium by ink ejected from the inkjet nozzles and a plurality of wiper members, each arranged corresponding to each recording head, and performing cleaning of a nozzle face of each recording head by moving relative to each recording head. Timing at which at least one of the wiper members abuts against one recording head is different from another timing at which another wiper member differing from the one wiper member abutting against the one recording head abuts against another recording head.

Abstract: An image forming system configured to eject ink onto a sheet conveyed in a first direction including a first head including a plurality of first ejection ports configured to eject the ink; a second head including a plurality of second ejection ports configured to eject the ink; an input part configured to be input ejection port information on the plurality of first ejection ports and the plurality of second ejection ports; and a controller configured to control ejection of the ink from the first ejection ports and the second ejection ports based on the ejection port information.