Abstract: An inkjet recording apparatus includes an ink ejection surface and a cleaning liquid nozzle. The ink ejection surface has an ink ejection port through which ink is ejected. The cleaning liquid nozzle has a cleaning liquid supply port through which cleaning liquid for cleaning the ink ejection surface is supplied. In the cleaning liquid nozzle, a concave meniscus is formed on a surface of the cleaning liquid.

Abstract: In an inkjet recording apparatus, a recording head has an ink ejection port through which ink is ejected, a cleaning liquid supplying portion has a cleaning liquid supply port through which cleaning liquid for cleaning an ink ejection surface having the ink ejection port, is supplied, and a cleaning member cleans the ink ejection surface by the cleaning liquid by moving while in contact with the ink ejection surface. The cleaning liquid supplying portion includes a main body portion and a protruding portion. The main body portion is disposed on an upstream side of the recording head in a moving direction of the cleaning member. The protruding portion protrudes from the main body portion toward a downstream in the moving direction, and covers, from below, lower ends of side surfaces of the recording head and the main body portion that face each other in the moving direction.

Abstract: A developing device includes a developing roller, a toner supplying roller, a regulation blade, a casing, a toner receiver support member, a toner receiver member, and a vibration generator. The toner receiver member is disposed along a longitudinal direction of the toner receiver support member facing the developing roller, and has a toner receiving surface inclined downward from the image-carrier side toward the toner-supplying-roller side. The toner receiving surface is disposed to be inclined so as to rise from the toner-supplying-roller side toward the image-carrier side. The toner receiving surface has a plurality of grooves formed therein to be inclined to approach a center part of the toner receiving surface from each end side of the toner receiving surface in its longitudinal direction, from an edge of the toner receiving surface on the image-carrier side toward an edge of the toner receiving surface on the toner-supplying-roller side.

Abstract: A developing device of the present disclosure includes a developing roller, a toner supplying roller, a regulation blade, a casing, a toner receiver support member, a toner receiver member, and a vibration generator. The toner receiver support member is disposed inside the casing so as to face the developing roller or the toner supplying roller between the regulation blade and an image carrier. The toner receiver member is disposed along a longitudinal direction of the toner receiver support member, and has a toner receiving surface that receives toner falling from the developing roller. The vibration generator vibrates the toner receiver member. At each end part of the toner receiving surface in its longitudinal direction, there is formed a thin-walled portion that is thinner in thickness than other parts of the toner receiving surface.

Abstract: A developing device includes a developing roller, a toner supplying roller, a regulation blade, a casing, a toner receiver support member, a toner receiver member, and a vibration generator. The toner receiver member is disposed along a longitudinal direction of the toner receiver support member facing the developing roller, and has a toner receiving surface inclined downward from the image-carrier side toward the toner-supplying-roller side. The toner receiving surface is disposed to be inclined so as to rise from the toner-supplying-roller side toward the image-carrier side. The toner receiving surface has a plurality of grooves formed therein to be inclined to approach a center part of the toner receiving surface from each end side of the toner receiving surface in its longitudinal direction, from an edge of the toner receiving surface on the image-carrier side toward an edge of the toner receiving surface on the toner-supplying-roller side.

Abstract: A developing device of the present disclosure includes a developing roller, a toner supplying roller, a regulation blade, a casing, a toner receiver support member, a toner receiver member, and a vibration generator. The toner receiver support member is disposed inside the casing so as to face the developing roller or the toner supplying roller between the regulation blade and an image carrier. The toner receiver member is disposed along a longitudinal direction of the toner receiver support member, and has a toner receiving surface that receives toner falling from the developing roller. The vibration generator vibrates the toner receiver member. At each end part of the toner receiving surface in its longitudinal direction, there is formed a thin-walled portion that is thinner in thickness than other parts of the toner receiving surface.

Abstract: A recovery system for a recording head according to the present disclosure includes a wiper, a drive mechanism, and a control portion. The control portion is able to execute a recovery operation for the recording head that includes an ink pushing-out operation that forcibly pushes out ink, a first wiping operation that moves the wiper in a first direction to wipe away purged ink, and a second wiping operation that moves the wiper in a direction opposite to the first direction to wipe away remaining ink. The wiper includes a first wiping surface disposed to face in the first direction, a second wiping surface disposed to face in a direction opposite to the first direction, and an upper surface. The first wiping surface and the upper surface have a high water repellency compared with the second wiping surface.

Abstract: A recovery system for a recording head according to the present disclosure includes a wiper, a drive mechanism, and a control portion. The control portion is able to execute a recovery operation for a recording head that includes a first ink pushing-out operation that forcibly pushes out ink, a first wiping operation that wipes away purged ink, and a second wiping operation that moves the wiper in a direction opposite to the first direction. The wiper includes a first wiping surface, a second wiping surface, and an upper surface. The upper surface is provided with a first step portion that becomes higher from a first upper end portion of the first wiping surface to a second upper end portion of the second wiping surface.

Abstract: A recovery system for a recording head according to the present disclosure includes a wiper, a drive mechanism, and a control portion. The control portion is able to execute a recovery operation for a recording head that includes a first ink pushing-out operation that forcibly pushes out ink, a first wiping operation that wipes away purged ink, and a second wiping operation that moves the wiper in a direction opposite to the first direction. The wiper includes a first wiping surface, a second wiping surface, and an upper surface. The upper surface is provided with a first step portion that becomes higher from a first upper end portion of the first wiping surface to a second upper end portion of the second wiping surface.

Abstract: A recovery system for a recording head according to the present disclosure includes a wiper, a drive mechanism, and a control portion. The control portion is able to execute a recovery operation for the recording head that includes an ink pushing-out operation that forcibly pushes out ink, a first wiping operation that moves the wiper in a first direction to wipe away purged ink, and a second wiping operation that moves the wiper in a direction opposite to the first direction to wipe away remaining ink. The wiper includes a first wiping surface disposed to face in the first direction, a second wiping surface disposed to face in a direction opposite to the first direction, and an upper surface. The first wiping surface and the upper surface have a high water repellency compared with the second wiping surface.

Abstract: In an inkjet recording apparatus, when one set of image data is divided in the sub scanning direction into A bands, and nozzles are divided in the main scanning direction into groups each comprising A nozzles, a selector associates, within each of the group, the nozzles in the first to Ath columns with the first to Ath bands with no overlap, and, for a nozzle that is to discharge ink for one pixel or less within one set of image data, makes the nozzle perform preparatory discharge in the band associated with the nozzle by selecting, out of different ink discharge drive waveforms, a first drive waveform (1) corresponding to the minimum gradation.

Abstract: An ink for ink-jet recording apparatuses includes water, a pigment dispersion, an organic solvent, and a humectant. The pigment dispersion includes a pigment and a resin having a weight average molecular weight of from 35,000 to 140,000. An adsorbed resin proportion determined from the mass of a total amount of resin in the ink and the amount of resin separated from pigment among the resin is at least 0.97. And, the ink contains from 3% to 15% by mass of C1-C4 monoalkyl ether of polyhydric alcohol based on the mass of the ink as the organic solvent.

Abstract: In an inkjet recording apparatus, when one set of image data is divided in the sub scanning direction into A bands, and nozzles are divided in the main scanning direction into groups each comprising A nozzles, a selector associates, within each of the group, the nozzles in the first to Ath columns with the first to Ath bands with no overlap, and, for a nozzle that is to discharge ink for one pixel or less within one set of image data, makes the nozzle perform preparatory discharge in the band associated with the nozzle by selecting, out of different ink discharge drive waveforms, a first drive waveform (1) corresponding to the minimum gradation.

Abstract: An inkjet recording apparatus according to one aspect of the present disclosure includes nozzle, pressuring chambers, piezoelectric element, ambient condition obtaining portion, application portion, and control portion. Control portion causes application portion to output ejection driving-voltage by which piezoelectric element is deformed so as to eject droplets from nozzles in printing period in printing state, and causes application portion to output vibration driving-voltage by which piezoelectric element is vibrated so as to vibrate meniscus in each nozzle in non-printing period between printing periods in printing state.

Abstract: An ink for ink-jet recording apparatuses, includes water, a pigment dispersion, and a super-penetrating agent and a high SP organic solvent respectively having a predetermined solubility parameter (SP value). All of differences (?SPs) between SP values of the neighboring organic solvents are from 0.5 to 5.0 in order of SP values thereof, and the difference of SPmax?SPmin is 12 or less in which SPmax is the highest SP value of an organic solvent among organic solvents in the high SP organic solvent and SPmin is the smallest SP value of an organic solvent among organic solvents in the super-penetrating agent.

Abstract: An inkjet recording apparatus according to one aspect of the present disclosure includes nozzle, pressuring chambers, piezoelectric element, ambient condition obtaining portion, application portion, and control portion. Control portion causes application portion to output ejection driving-voltage by which piezoelectric element is deformed so as to eject droplets from nozzles in printing period in printing state, and causes application portion to output vibration driving-voltage by which piezoelectric element is vibrated so as to vibrate meniscus in each nozzle in non-printing period between printing periods in printing state.