Abstract: A valve device includes a stationary disk, a shaft and a rotor. The valve device includes: a housing that has a boss portion, through which the shaft is inserted; and a seal member that is shaped in a ring form and is configured to seal a gap between the shaft and the boss portion. The shaft includes a holder that has a contact portion which is in contact with the seal member. The holder is made of a polymer material which includes reinforcing fibers contained in resin. At least the contact portion at the holder extends in an axial direction of the shaft, and a distal end portion of the holder located on one side in the axial direction is coupled to a gear arrangement of a drive device. The distal end portion of the holder has a trace of an injection gate for injecting the polymer material.

Abstract: A liquid ejection apparatus includes: a liquid ejection head including an ejection port configured to eject a liquid and a pressure chamber communicating with the ejection port; a circulation unit configured to circulate the liquid in the liquid ejection head so as to pass through the; a recovery unit configured to perform a recovery operation of the liquid ejection head at a circulation flow velocity slower than a circulation flow velocity of the circulation unit in a case where the liquid ejection head prints an image on a printing medium; and a control unit configured to control preliminary ejection to eject the liquid that is not used for the printing from the ejection port in parallel with the recovery operation by the recovery unit.

Abstract: A printing apparatus includes a conveyance unit configured to convey a sheet, a printing unit configured to print an image by discharging ink to the sheet conveyed by the conveyance unit, a heating unit configured to heat the sheet conveyed by the conveyance unit and to which the image has been printed by the printing unit, and a control unit configured to, in a case of double-side printing in which after printing an image on a first side of the sheet, an image is printed on a second side of the sheet, based on an amount of ink discharged for the first side and an amount of ink discharged for the second side, control heating by the heating unit with respect to the second side.

Abstract: A drying apparatus includes an infrared heater, a reflector, and a measurement part. The reflector has a reflecting surface which reflects infrared rays. The measurement part includes a light emitting part and a light receiving part, and measures a reflectance at a plurality of places on the reflecting surface.

Abstract: A valve device includes a shaft, a housing defining a flow passage and having a plurality of openings, and a first movable disk and a second movable disk being rotatable. The plurality of openings includes one-side openings and other-side openings. The housing includes a one-side partition wall partitioning the flow passage into a plurality of one-side flow passages and an other-side partition wall partitioning the flow passage into a plurality of other-side flow passages. The first movable disk is rotated to switch a one-side flow passage communicating with a first through-hole. The second movable disk is rotated to switch an other-side flow passage communicating with a second through-hole.

Abstract: A feeding device includes a sheet tray, a transport device, a sheet sensor, and a control device. On the sheet tray, a sheet is placed. The transport device transports the sheet placed on the sheet tray. The sheet sensor is located upstream of the transport device in a sheet transport direction, and outputs curvature information indicating a curvature status of the sheet being transported by the transport device. The control device includes a processor, and acts as a measuring device and a calculation device, when the processor executes a control program. The measuring device measures a curvature amount of the sheet, on a basis of the curvature information. The calculation device calculates rigidity of the sheet, on a basis of the curvature amount.

Abstract: A valve device includes a housing, a stationary valve and a drive valve. The stationary valve is placed in a fluid passage of the housing. The stationary valve forms a first passage, which conducts fluid, and a penetrating chamber which penetrates through the stationary valve in the axial direction. The drive valve is placed on one axial side of the stationary valve in the fluid passage and forms a second passage which conducts the fluid. The drive valve communicates the second passage to the first passage through rotation of the drive valve. The housing has a bottom portion that covers the penetrating chamber from another axial side. An upstream passage of the fluid passage, which is located on an upstream side of the drive valve and the stationary valve in a flow direction of the fluid, is communicated with the penetrating chamber through a communication passage.

Abstract: A housing forms: a first space and a second space; and a third space that is placed on one side relative to the first space and the second space in one direction. A primary partition partitions between the first space and the second space, and secondary partitions partition the first space into a plurality of subspaces. A valve element has: a first communication passage extending through the valve element in the one direction; and a second communication passage recessed on the valve element from another side toward the one side in the one direction. In response to movement of the valve element, the valve element changes a subspace to be communicated with the third space through the first communication passage among the plurality of subspaces and also changes another subspace to be communicated with the second space through the second communication passage among the plurality of subspaces.

Abstract: An image forming apparatus includes a heater, a temperature sensor, a power supply circuit, a main processor, and a sub-processor. The temperature sensor is configured to detect a temperature of the heater. The power supply circuit is configured to perform power supply to the heater. The main processor is configured to supply a heater control signal to the power supply circuit based on the temperature detected by the temperature sensor to control the power supply circuit and adjust the temperature of the heater. The sub-processor (a) monitors whether or not an output from the main processor is made regularly, and (b) supplies, to the power supply circuit, the heater control signal for cutting off the power supply to the heater when determination is made that the output is not made.

Abstract: An image forming apparatus includes: an image forming portion which discharges ink onto a recording medium to form an image; a heat source portion which heats the ink on the recording medium; an exhaust air duct from which gas heated by the heat source portion is exhausted; and a detection portion which detects smoke or gas generated at a time of fire. The exhaust air duct is arranged such that an inlet from which gas is sucked in opposes the heat source portion. The detection portion is arranged inside the exhaust air duct.

Abstract: A valve device includes a housing, a stationary disk, a drive device, a shaft and a rotor. The stationary disk is fixed at an inside of the housing and has at least one flow passage hole. The shaft is rotated about a central axis by the drive device. The rotor increases or decreases an opening degree of the at least one flow passage hole. The rotor includes: a drive disk that slides relative to the stationary disk; and a lever that is fixed to the drive disk and couples between the drive disk and the shaft. A torsion spring is placed between the shaft and the lever and urges the lever relative to the shaft in a circumferential direction around the central axis of the shaft. The shaft has a plurality of contact portions configured to contact the lever and respectively located at a plurality of locations.

Abstract: An image forming apparatus includes a sheet storage section, an image forming device, a transport route, a transport device, and a switching device. The switching device is turned on or off depending on a pressing force applied by an end portion of a sheet being transported along the transport route, at a position on the transport route upstream of the image forming device in a sheet transport direction. The switching device is turned on or off depending on whether the pressing force is equal to or larger than a predetermined pressing force to be applied by the sheet having predetermined rigidity, or smaller than the predetermined pressing force.

Abstract: A printing apparatus includes a conveyance unit configured to convey a sheet along a conveyance path, a printing unit configured to print an image by discharging ink to the sheet conveyed by the conveyance unit, a heating unit configured to, in a heating section on the conveyance path, heat the sheet on which the image has been printed by the printing unit, and a control unit configured to control the heating unit so that the heating section is changed in accordance with a print condition.

Abstract: A liquid discharge apparatus includes a conveying part configured to convey a medium in a conveying direction. A discharge head is configured to discharge a droplet onto a medium carried by the conveying part. A heating part is arranged at the downstream of the discharge head and configured to heat a medium while contacting with the medium attached with a droplet discharged by the discharge head. The heating part is arranged at a position contacting with at least part of the droplet present on the surface of the medium.

Abstract: A valve device includes a flow path formation member provided with at least one flow path hole through which a fluid passes, and a drive part that outputs a rotational force. The valve device includes a shaft, and a rotor having a sliding surface that slides while facing an opening surface of the flow path formation member where the flow path hole is opened, and the rotor is configured to increase or decrease an opening degree of the flow path hole with rotation of the shaft. The valve device includes an energization member that energizes the rotor toward the flow path formation member. The valve device includes a coupling structure configured to tiltably couple the shaft to the rotor such that a contact state between the sliding surface and the opening surface is held regardless of a posture or a position of the shaft.

Abstract: A fluid circulation circuit includes a flow passage switching valve. The flow passage switching valve includes a body and a switcher. The body includes a first inlet, a second inlet, and outlets including a first outlet. The switcher is capable of switching a passage configuration to a state in which a fluid that has flowed in from the first inlet flows out of either one of the outlets and a state in which the fluid that has flowed in from the second inlet flows out of either one of the outlets.

Abstract: A valve device includes: a driving source making rotational motion; a rotated part provided rotatably around a predetermined axis; and a fluid passage portion having a flow hole for passing a fluid. The valve device further includes: a gear mechanism having gears to transmit rotational motion of the driving source to the rotated part by engagement between the gears to rotate the rotated part; and a biasing part biasing the rotated part toward one side in a circumferential direction with the predetermined axis at the center. The rotated part includes a rotor increasing or reducing an opening of the flow hole in conjunction with rotation of the rotated part and is rotated according to rotational motion of the driving source while being biased toward the one side in the circumferential direction by the biasing part.

Abstract: A valve device includes a stationary disk, a shaft and a rotor. The valve device includes: a housing that has a boss portion, through which the shaft is inserted; and a seal member that is shaped in a ring form and is configured to seal a gap between the shaft and the boss portion. The shaft includes a holder that has a contact portion which is in contact with the seal member. The holder is made of a polymer material which includes reinforcing fibers contained in resin. At least the contact portion at the holder extends in an axial direction of the shaft, and a distal end portion of the holder located on one side in the axial direction is coupled to a gear arrangement of a drive device. The distal end portion of the holder has a trace of an injection gate for injecting the polymer material.

Abstract: A valve device may include: a shaft which has a shaft central axis; a stationary disk; a rotor; a housing which has a housing central axis and an opening; a housing cover which closes the opening; and a seal member. The seal member is eccentric with respect to the shaft central axis in conformity with the amount of eccentricity between the shaft central axis and the housing central axis. A valve device may include: a drive device; a shaft which has a shaft central axis; a stationary disk; a rotor; a housing which has a housing central axis and an opening; a drive device case which closes the opening and receives the drive device; and a seal member. The seal member is eccentric with respect to the shaft central axis in conformity with the amount of eccentricity between the shaft central axis and the housing central axis.

Abstract: A valve device includes a housing, a stationary valve and a drive valve. The stationary valve is placed in a fluid passage of the housing. The stationary valve forms a first passage, which conducts fluid, and a penetrating chamber which penetrates through the stationary valve in the axial direction. The drive valve is placed on one axial side of the stationary valve in the fluid passage and forms a second passage which conducts the fluid. The drive valve communicates the second passage to the first passage through rotation of the drive valve. The housing has a bottom portion that covers the penetrating chamber from another axial side. An upstream passage of the fluid passage, which is located on an upstream side of the drive valve and the stationary valve in a flow direction of the fluid, is communicated with the penetrating chamber through a communication passage.