Abstract: A carriage device includes a first guide member and a second guide member for supporting a carriage with a head mounted thereon at two separate positions and guiding reciprocation of the carriage, a first adjustment unit configured to adjust a height of the carriage relative to the first guide member through movement of the carriage, and a second adjustment unit configured to adjust a height of the carriage relative to the second guide member through the movement of the carriage. The carriage device can sequentially perform a first operation of changing the height of the carriage by the first adjustment unit and a second operation of changing the height of the carriage by the second adjustment unit.

Abstract: A carriage device includes a first guide member and a second guide member for supporting a carriage with a head mounted thereon at two separate positions and guiding reciprocation of the carriage, a first adjustment unit configured to adjust a height of the carriage relative to the first guide member through movement of the carriage, and a second adjustment unit configured to adjust a height of the carriage relative to the second guide member through the movement of the carriage. The carriage device can sequentially perform a first operation of changing the height of the carriage by the first adjustment unit and a second operation of changing the height of the carriage by the second adjustment unit.

Abstract: For each of a plurality of areas in at least one of a sheet width direction and a sheet conveying direction included in a sheet trailing edge area during printing on a first surface, information regarding an ink application amount to the area is acquired. According to a combination of acquired pieces of information regarding the ink application amounts to the plurality of areas, waiting time until a printing start on a second surface from an end of printing in the sheet trailing edge area is determined.

Abstract: A motor control method performed by a controller includes monitoring a motor load of at least one of a plurality of motors including a first motor and a second motor driven by one common power source having a protection circuit, wherein the protection circuit is operated to shut down the power source in a case where a current value of the power source continues to exceed a threshold during a period Tg, and stopping motor drive in a case where the monitored motor load continues to exceed the threshold during a period Tn, which is shorter than the period Tg. In addition, monitoring of the motor load is skipped during acceleration operations of the first motor and the second motor when both the first motor and the second motor are driven, and then monitoring of the motor load is restarted.

Abstract: A printing device that prints on media held in a tray includes a first roller section including a first conveyance roller; a second roller section including a second conveyance roller and a pinch roller; and a printing section provided between the first and the second roller sections. Printing is performed on the top surface of the media in the printing section while the tray is being conveyed by the first and the second roller sections. The tray is such that friction surfaces having a coefficient of friction that is higher than that of the other portions of the tray are formed in portions that come in contact with the first conveyance roller when the tray is taken in by the first roller section and the tip end of the tray advances to a gripping section between the second conveyance roller and the pinch roller.

Abstract: A printing apparatus according to the present invention includes a feeding unit, a conveying unit, a printing unit, and a control unit. The control unit performs a successive feeding operation. An operating state of the feeding unit changes between a first operating state and a second operating state in which a feeding stop is more unstable than that in the first operating state, in a period from a start of feeding a printing medium until the printing medium reaches the conveying unit. In the successive feeding operation, a subsequent printing medium is fed without stopping until a leading end of the subsequent printing medium reaches a stoppable position. The stoppable position is arranged on an upstream side of the conveying unit. The subsequent printing medium can be stopped in the first operating state at the stoppable position.

Abstract: In an apparatus including a plurality of motors driven by a common power source, even in a case of a power source having a small capacity, easy shutdown of the power source is prevented. Therefore, a motor load of at least one of the plurality of motors including a first motor and a second motor driven by the one common power source is monitored, and motor drive is stopped in the case where a tolerance is exceeded. At this time, the motor load is not monitored during an acceleration operation of the first motor or the second motor in the case where both the first motor and the second motor are driven.

Abstract: A printing device that prints on media held in a tray, including: a first roller section including a first conveyance roller; a second roller section including a second conveyance roller and a pinch roller; and a printing section provided between the first and the second roller sections; wherein printing is performed on the top surface of the media in the printing section while the tray is being conveyed by the first and the second roller sections; and wherein the tray is such that friction surfaces having a coefficient of friction that is higher than that of the other portions of the tray are formed in portions that come in contact with the first conveyance roller when the tray is taken in by the first roller section and the tip end of the tray advances to a gripping section between the second conveyance roller and the pinch roller.

Abstract: A printing apparatus according to the present invention includes a feeding unit, a conveying unit, a printing unit, and a control unit. The control unit performs a successive feeding operation. An operating state of the feeding unit changes between a first operating state and a second operating state in which a feeding stop is more unstable than that in the first operating state, in a period from a start of feeding a printing medium until the printing medium reaches the conveying unit. In the successive feeding operation, a subsequent printing medium is fed without stopping until a leading end of the subsequent printing medium reaches a stoppable position. The stoppable position is arranged on an upstream side of the conveying unit. The subsequent printing medium can be stopped in the first operating state at the stoppable position.

Abstract: For each of a plurality of areas in at least one of a sheet width direction and a sheet conveying direction included in a sheet trailing edge area during printing on a first surface, information regarding an ink application amount to the area is acquired. According to a combination of acquired pieces of information regarding the ink application amounts to the plurality of areas, waiting time until a printing start on a second surface from an end of printing in the sheet trailing edge area is determined.

Abstract: A sheet feeding apparatus is provided that includes a sheet feeding tray 21 that can rotate to open and close; a sheet positioning portion 25a disposed in a sheet feeding portion such that it can contact against a side end of stacked sheets S; an edge limiting member 211 disposed in the sheet feeding tray such that it can contact against a side end of the sheets on a side that is further upstream than the sheet positioning portion; and a control unit that controls an inverted posture of the edge limiting member in response to an operation to open or close the sheet feeding tray; wherein the edge limiting member rises accompanying an operation to open the sheet feeding tray and the edge limiting member collapses accompanying an operation to close the sheet feeding tray.

Abstract: A recording apparatus includes a carriage on which a recording head is mounted, the recording head ejecting liquid onto a recording medium, and a guiding member that guides the movement of the carriage, a sliding member that moves together with the carriage and slides on the guide member, and a distance control member for controlling the distance between the recording head and the recording medium. The distance control member is nipped between the carriage and the sliding member in the direction substantially perpendicular to the recording surface of the recording medium. The carriage, the sliding member, and the distance control member can be put in a combined state where they are combined with each other. The recording apparatus further includes a preventing portion for preventing the carriage, the sliding member, and the distance control member in the combined state from moving in the direction substantially perpendicular to the recording surface.

Abstract: Ridges and grooves are alternately formed on a platen in the direction of transporting sheets. Wave holding spurs are rotatably supported by torsion springs downstream of a recording area, and pressed against the grooves. Sheet discharge roller pairs are disposed generally downstream from the grooves. Recording sheets exhibit cockling which rises up toward a recording head due to swelling from ink, but a substantial amount of the swelling is contained in the grooves, so the cockling does not come into contact with the recording head, and further, the peak-to-peak distance of the wave shapes of the recording sheets can be reduced. Following the leading edge of a recording sheet passing the sheet discharge roller pairs, the crests of the cockling are collapsed by transporting spurs and divided between wave holding spurs and the transporting spurs, and thus the peak-to-peak distance is further reduced, consequently preventing off-target landing of ink droplets.

Abstract: A sheet feeding apparatus is provided that includes a sheet feeding tray 21 that can rotate to open and close; a sheet positioning portion 25a disposed in a sheet feeding portion such that it can contact against a side end of stacked sheets S; an edge limiting member 211 disposed in the sheet feeding tray such that it can contact against a side end of the sheets on a side that is further upstream than the sheet positioning portion; and a control unit that controls an inverted posture of the edge limiting member in response to an operation to open or close the sheet feeding tray; wherein the edge limiting member rises accompanying an operation to open the sheet feeding tray and the edge limiting member collapses accompanying an operation to close the sheet feeding tray.

Abstract: Ridges and grooves are alternately formed on a platen in the direction of transporting sheets. Wave holding spurs are rotatably supported by torsion springs downstream of a recording area, and pressed against the grooves. Sheet discharge roller pairs are disposed generally downstream from the grooves. Recording sheets exhibit cockling which rises up toward a recording head due to swelling from ink, but a substantial amount of the swelling is contained in the grooves, so the cockling does not come into contact with the recording head, and further, the peak-to-peak distance of the wave shapes of the recording sheets can be reduced. Following the leading edge of a recording sheet passing the sheet discharge roller pairs, the crests of the cockling are collapsed by transporting spurs and divided between wave holding spurs and the transporting spurs, and thus the peak-to-peak distance is further reduced, consequently preventing off-target landing of ink droplets.

Abstract: Ridges and grooves are alternately formed on a platen in the direction of transporting sheets. Wave holding spurs are rotatably supported by torsion springs downstream of a recording area, and pressed against the grooves. Sheet discharge roller pairs are disposed generally downstream from the grooves. Recording sheets exhibit cockling which rises up toward a recording head due to swelling from ink, but a substantial amount of the swelling is contained in the grooves, so the cockling does not come into contact with the recording head, and further, the peak-to-peak distance of the wave shapes of the recording sheets can be reduced. Following the leading edge of a recording sheet passing the sheet discharge roller pairs, the crests of the cockling are collapsed by transporting spurs and divided between wave holding spurs and the transporting spurs, and thus the peak-to-peak distance is further reduced, consequently preventing off-target landing of ink droplets.

Abstract: Ridges and grooves are alternately formed on a platen in the direction of transporting sheets. Wave holding spurs are rotatably supported by torsion springs downstream of a recording area, and pressed against the grooves. Sheet discharge roller pairs are disposed generally downstream from the grooves. Recording sheets exhibit cockling which rises up toward a recording head due to swelling from ink, but a substantial amount of the swelling is contained in the grooves, so the cockling does not come into contact with the recording head, and further, the peak-to-peak distance of the wave shapes of the recording sheets can be reduced. Following the leading edge of a recording sheet passing the sheet discharge roller pairs, the crests of the cockling are collapsed by transporting spurs and divided between wave holding spurs and the transporting spurs, and thus the peak-to-peak distance is further reduced, consequently preventing off-target landing of ink droplets.

Abstract: To provide a sheet conveying apparatus of low cost and high durability and also to provide an image forming apparatus having the same. A sheet S1 is pinched and conveyed by a metal driving roller having roughness provide on its surface and a pinch roller coming in pressure contact with the driving roller and thereby driven to rotate. And the pinch roller is formed of synthetic resin, so that the pinch roller can be manufactured less costly and the durability of the same can be increased.

Abstract: An ink jet recording apparatus, which records with deposition of ink droplets onto a recording medium by use of an ink jet recording head, includes a platen for supporting a recording medium in a position facing the ink jet recording head, a plurality of carrier roller pairs for nipping and carrying the recording medium to the position of ink deposition by the ink jet recording head and extrusions extended in the carrying direction of the recording medium with respect to the platen and arranged in the direction intersecting the carrying direction of the recording medium to support the reverse side of recording medium. The carrier roller pairs are positioned on each of the extended lines of the extrusions on the upstream side relative to carrying direction of the recording medium.

Abstract: An ink jet recording apparatus, which records with deposition of ink droplets to a recording medium by use of ink jet recording means, comprises a platen for supporting a recording medium in a position facing ink jet recording means, a plurality of carrier roller pairs for nipping and carrying the recording medium to the position of ink deposition the recording medium using the ink jet recording means and extrusions extended in the carrying direction of the recording medium with respect to the platen, at the same time, being arranged in a plurality in the direction intersecting the carrying direction of the recording medium to support the reverse side of recording medium. Here, the carrier roller pairs are positioned on each of the extended lines of the extrusions on the upstream side of the carrying direction of the recording medium.