Abstract: Couplers that are configured to engage with an attachment point on a camera or lens. Following general camera construction, the attachment points are typically found on the bottom of the camera or lens. The attachment points may be specifically configured to engage with the couplers. The couplers may be freely rotatable relative to the camera to prevent binding or tangling of a camera strap to which the couplers are connected.

Abstract: A projector includes a projection lens having a plurality of lenses and projects modulated light from a light modulator, a receiver that externally receives an optical signal, and an exterior enclosure that forms the exterior of the projector. The projection lens has a front-side lens disposed in a most downstream position in an optical path among the plurality of lenses and having a diameter larger than the diameters of the other lenses. The exterior enclosure has an upper surface portion. The upper surface portion has a swelling portion that swells in such a way that the swelling portion covers part of a circumferential edge portion of the front-side lens. The receiver is disposed in the swelling portion and so oriented that the receiver receives the optical signal incident from a side opposite to a side where the light is projected through the projection lens.

Abstract: A projector includes a casing, an optic engine, a light module, a control circuit module, a first fan module, and a second fan module. The optic engine, the light module, the control circuit module, the first fan module, and the second fan module are disposed in the casing. The first fan module is an axial-flow fan module and has an air inlet and an air outlet. The air inlet is close to and toward the control circuit module; the air outlet is close to and toward the light module. The first fan module generates an air flow flowing through the control circuit module, the first fan module, and the light module in order. The second fan module has an air outlet close to the optic engine. Thereby, heat produced by the above-mentioned components of the projector in the casing can be dissipated efficiently.

Abstract: A light source device includes: a first semiconductor laser; a second semiconductor laser; a first collimator lens corresponding to the first semiconductor laser; a second collimator lens corresponding to the second semiconductor laser; and a deflection prism provided on the light exiting side of the first collimator lens so that an angle formed by a principal ray of first light emitted from the first semiconductor laser and a principal ray of second light emitted from the second semiconductor laser is smaller on the light exiting side of the deflection prism than on the light incident side thereof.

Abstract: A light projection apparatus includes: a light setting unit to set specifications of lights; an optical data generating unit to generate optical data with the specifications; a projection range setting unit to set projection ranges; an optical correction data generating unit to generate optical correction data by correcting the optical data to project the lights to the projection ranges; a layer specifying unit to classify the optical correction data and specify a priority of layer; and a light drawing unit to generate light drawing data through drawing process on the optical correction data. The apparatus further includes a light projection unit to project the lights with the light drawing data.

Abstract: The present disclosure relates to a method and apparatus for mitigating printable native defects in an extreme ultra violet (EUV) mask substrate. In some embodiments, the method is performed by providing an EUV mask substrate having a multi-layer coating disposed over a low thermal expansion material. The sizes of one or more native defects within the EUV mask substrate are measured and printable native defects having a measured size that violates one or more sizing thresholds are identified. A position at which a patterned absorber material is to be formed over the multi-layer coating is determined. The position minimizes a number printable native defects that interact with EUV radiation during an EUV lithography process. By mitigating a number of printable native defects violating the one or more sizing thresholds, the process window of an EUV reticle formed from the EUV mask substrate is improved.

Abstract: A method for manufacturing a photomask is provided. The method includes providing a flexible substrate, forming a plurality of microstructures on the flexible substrate, coating the flexible substrate with a shading material to form a shading layer on the substrate, and solidifying the shading layer which is a single layer.

Abstract: The present invention relates to a cyclodextrin derivative, a method for preparing the same, a photoresist composition, a color photoresist and a display device. The cyclodextrin derivative particularly is a ?-cyclodextrin modified polymerizable monomer represented by the following formula I or I?, wherein k is any integer selected from 2-6, n is any integer selected from 1-3, R is an aromatic ring having 5 to 30 carbon atoms, R? is a multivalent straight or branched carbon chain having 5 to 30 carbon atoms which may optionally be interrupted by O. The ?-cyclodextrin modified polymerizable monomer can be applied to a photoresist composition which has small aberration and high transmittance, thereby improving the display quality of the display apparatus.

Abstract: The present invention relates to a modified epoxy acrylate and a method for producing the same, a photoresist composition and a method for producing the same, and a transparent photoresist formed from the photoresist composition. The modified epoxy acrylate is an epoxy acrylate modified with phosphate monomer which has a structure represented by Formula I wherein, n is an integer selected from 1˜21, R is a short-chain carboxylic acid ester group having the structural formula in which p is a bivalent saturated or unsaturated carbon chain having 1˜10 carbon atoms, and the carbon chain is optionally substituted by alkyl, alkenyl, hydroxy, nitro or halogen. Since the phosphate can react with the multi-valence metal in substrates so as to connect the polymer onto the substrates firmly through covalent bonds, therefore the adhesion force is improved significantly and the protective function of the tranparent photoresist is improved accordingly.

Abstract: New photoresist compositions are provided that are useful for immersion lithography. Preferred photoresist compositions of the invention comprise one or more block copolymers. Particularly preferred photoresists of the invention can exhibit reduced leaching of resist materials into an immersion fluid contacting the resist layer during immersion lithography processing.

Abstract: The present invention relates to a photosensitive resin composition, a protective film and an element having the same. The aforementioned photosensitive resin composition includes a polysiloxane resin (A), an alkali-soluble resin (B), an ortho-naphthoquinone diazide sulfonic acid ester (C) and a solvent (D). The alkali-soluble resin (B) is copolymerized by an unsaturated carboxylic acid or unsaturated carboxylic anhydride compound (b2), a fluorene derivative having a double-bond group (b2) and an unsaturated compound having an acid-decomposable group (b3).

Abstract: According to one example of the present application, there is provided a pattern forming method including: (i) forming a film by using an actinic ray-sensitive or radiation-sensitive resin composition containing (A) a specific resin and (B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation; (ii) exposing the film; and (iii) developing the film exposed, by using an organic solvent-containing developer to form a negative pattern.

Abstract: The purpose of the present invention is to provide a negative-type photosensitive coloring composition ideal for forming a white, light-blocking pattern and which not only has excellent chemical resistance, but also has extremely excellent heat resistance and does not yellow or crack even when undergoing high-temperature processing. This negative-type photosensitive coloring composition contains (A) a white pigment, (B) a polysiloxane obtained by co-hydrolyzate condensation of an alkoxysilane compound containing a compound of a specific structure, (C) polyfunctional acrylic monomers, (D) a photoradical polymerization initiator and (E) an organic solvent.

Abstract: A positive resist composition comprising an organosiloxane-modified novolak resin, a photosensitive agent, and an organic solvent is provided, the resin comprising structural units having formula (1) wherein R1 is an organosiloxy group, and R2 is hydrogen or alkyl. The composition is photosensitive, turns alkali soluble in the exposed region, eliminates any film thickness loss after development, and displays improved resistance to electrolytic plating and O2 dry etching.

Abstract: There is provided a resist underlayer film-forming composition to reduce the amount of sublimate generated from the resist underlayer film at baking process and to suppress aging and have high storage stability. A resist underlayer film-forming composition including an aryl sulfonic acid salt compound having a hydroxy group of Formula (1): (where Ar is a benzene ring or an aromatic hydrocarbon ring wherein benzene rings are condensed; m1 is an integer of 0 to (2+2n), m2 and m3 each is an integer of 1 to (3+2n), and (m1+m2+m3) is an integer of 2 to (4+2n), with the proviso that n is the number of the benzene rings or condensed benzene rings in the aromatic hydrocarbon ring and is an integer of 1 to 6; X+ is NH4+, a primary ammonium ion, secondary ammonium ion, tertiary ammonium ion, quaternary ammonium ion, sulfonium ion, or an iodonium cation).

Abstract: Apparatus for nanofabrication on an unconventional substrate including a patterned pliable membrane mechanically coupled to a membrane support structure, a substrate support structure to receive a substrate for processing, and an actuator to adjust the distance between the pliable membrane and the substrate. Nanofabrication on conventional and unconventional substrates can be achieved by transferring a pre-formed patterned pliable membrane onto the substrate using a transfer probe or non-stick sheet, followed by irradiating the substrate through the patterned pliable membrane so as to transfer the pattern on the pliable membrane into or out of the substrate. The apparatus and methods allow fabrication of diamond photonic crystals, fiber-integrated photonic devices and Nitrogen Vacancy (NV) centers in diamonds.

Abstract: A method for improving a lithographic process for imaging a portion of a design layout onto a substrate using a lithographic projection apparatus, the method including: calculating a discrete pupil profile based on a desired pupil profile; selecting a discrete change to the discrete pupil profile; and applying the selected discrete change to the discrete pupil profile. The methods according to various embodiments disclosed herein may reduce the computational cost of discrete optimization from O(an) to O(n) wherein a is constant and n is the number of knobs that can generate discrete change in the pupil profile.

Abstract: A system and method are provided for enclosing a plurality of cleaning unit components in a moist cleaning unit environment, the plurality of cleaning unit components cooperating to employ a cleaner roller in an image forming device to facilitate effective cleaning of a reimageable surface in an image forming device using a proposed variable data digital lithographic image forming architecture. A range of solvents may be applied to a hard smooth high surface energy surface of the cleaner roll and a cleaning unit component internally positioned within the cleaning enclosure to clean the surface of the cleaner roll. Mechanical components are properly placed prior to the cleaner roll-reimageable surface nip to ensure that residual liquid on a surface of the cleaner roll is removed.

Abstract: A computer-implemented method for simulating a scattered radiation field of a patterning device including one or more features, in a lithographic projection apparatus, the method including: determining a scattering function of the patterning device using one or more scattering functions of feature elements of the one or more features; wherein at least one of the one or more features is a three-dimensional feature, or the one or more scattering functions characterize scattering of incident radiation fields at a plurality of incident angles on the feature elements.

Abstract: The present invention provides a measurement apparatus that includes a movable stage and measures a position of a mark on the stage, comprising an imaging device including a plurality of pixels arranged at a pitch and imaging the mark, a driving device changing a relative position between the stage and the imaging device, a measurement device measuring the relative position, and a processor obtaining the position of the mark based on a plurality of images respectively obtained by the imaging device at a plurality of relative positions between the stage and the imaging device that are different from each other and associated with the pitch, wherein the processor is configured to obtain, based on a deviation with respect to one of the plurality of relative positions, a target relative position with respect to another of the plurality of relative positions.

Abstract: An XY-table includes a separate drive for reversing the direction of movement of the table. A ferromagnetic rib projects at one edge of the table and extends perpendicular to the direction of movement of the table to be reversed. The drive has a magnetic yoke for receiving the rib when the table is near a reversal point, the free ends of the magnetic yoke having pole shoes which concentrate a magnetic flux in the yoke, switchable with the aid of a reversal coil, in an air gap through which the rib extends into the interior of the yoke.

Abstract: When a transition from a first state where one stage is positioned at a first area directly below projection optical system to which liquid is supplied to a state where the other stage-is positioned at the first area, both stages are simultaneously driven while a state where both stages are close together in the X-axis direction is maintained. Therefore, it becomes possible to make a transition from the first state to the second state in a state where liquid is supplied in the space between the projection optical system and the specific stage directly under the projection optical system. Accordingly, the time from the completion of exposure operation on one stage side until the exposure operation begins on the other stage side can be reduced, which allows processing with high throughput. Further, because the liquid can constantly exist on the image plane side of the projection optical system, generation of water marks on optical members of the projection optical system on the image plane side is prevented.

Abstract: A triarylamine derivative is represented by general formula (I). In general formula (I), R1 and R2 each represent, independently of one another, a chemical group selected from the group consisting of a halogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, and an optionally substituted aryl group having a carbon number of at least 6 and no greater than 12. In general formula (I), m and n each represent an integer of at least 0 and no greater than 4. When m and n represent integers greater than 1, chemical groups R1 bonded to the same aromatic ring and chemical groups R2 bonded to the same aromatic ring may be the same or different to one another.

Abstract: A hydrazone derivative of triphenylamine is represented by general formula (1). In general formula (1), R1 and R2 each represent, independently of one another, at least one chemical group selected from the group consisting of a halogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, and an optionally substituted aryl group having a carbon number of at least 6 and no greater than 12. In general formula (1), m and n each represent, independently of one another, an integer of at least 0 and no greater than 4. In general formula (1), 1 represents 0 or 1.

Abstract: The object of the present invention is to provide an electrophotographic toner hardly causing toner scattering and capable of achieving an adequate decorativeness, a manufacturing method thereof, a toner cartridge and an image forming apparatus. In accordance with an embodiment, the electrophotographic toner is a toner in which coloring agent particles are coated by resin. The volume mean diameter of the coloring agent particles is above 6 ?m. The ratio (S/V) of the BET specific surface area S (m?2/g) of the electrophotographic toner to the volume mean diameter V (?m) of the electrophotographic toner is above 0.015.

Abstract: Provided is a toner, including a toner particle having a core particle containing a binder resin and a colorant. The toner particle has a protrusion on a surface thereof, and the protrusion contains an olefin-based polymer having a cyclic olefin structure. When an average radius of curvature of the protrusion, an average particle diameter of the core particle, a projected area of the toner particle, and a projected area of the protrusion that are calculated from a planar projected image of an image of the toner particle photographed with a scanning electron microscope are represented by Rs (?m), Rc (?m), S, and S1, respectively, the average radius of curvature Rs of the protrusion is 0.004Rc ?m or more and 0.100Rc ?m or less, and an average of a surface coverage “100×S1/S” % is 5% or more and 90% or less.

Abstract: An image forming method is provided. The method includes the steps of forming an electrostatic latent image on a photoconductor; developing the electrostatic latent image into a toner image with a toner; transferring the toner image onto a recording medium having a smoothness of 20 s or less; and fixing the toner image on the recording medium. The toner exhibits an adhesion force of 100 gf or more, where the adhesion force is the maximum value of a pull force between a layer of the toner and standard paper determined by a tacking test with a probe temperature of 140° C.

Abstract: Provided is a toner having high coloring power and being excellent in light fastness. Specifically, provided is a yellow toner, including at least: a binder resin; a wax; and a colorant, in which the colorant contains a compound represented by the general formula (1).

Abstract: A toner contains toner particles having a surface layer containing an organosilicon polymer. The organosilicon polymer has a particular partial structure. The surface layer has a particular average thickness Dav. The ratio of silicon ions to carbon ions emitted from the toner particles in response to irradiation of the toner particles with primary ions in mapping measurement by FIB-TOF-SIMS is specified.

Abstract: A method is provided for producing toner particles containing an organosilicon polymer, produced by mixing an organosilicon compound and an aqueous medium containing base particles, and polymerizing the organosilicon compound. The organosilicon compound has a particular structure represented by formula (1) or (2). The organosilicon polymer is produced by polymerization at 80.0° C. or more and 105.0° C. or less.

Abstract: An image forming apparatus is provided with: a controller capable of changing a developing bias, which is to be applied to a developing roller configured to carry developer thereon; a peripheral speed ratio of a developing roller to a photosensitive member; a control method by the controller, and a program for operating the controller, the disclosure directed to a configuration where the developing roller is contacted to the photosensitive member when a developing bias is made to be lower during the non-developing than during a developing phase, the configuration can suppress press fogging at room temperature and low humidity conditions, therefore an object of the present disclosure is to provide an image forming apparatus, a control method and a program capable of favorably suppressing press fogging during non-developing.

Abstract: A developing device includes a housing, a developer carrier, a conveying member and a surface layer. The conveying member conveys the developer in the first conveying direction and supplies the developer to the developer carrier. The surface layer is arranged on the circumferential surface of the developer carrier and formed on a surface of a predetermined cylindrical base member. The surface layer is formed by an immersion method of immersing the base member in an immersion tank so that an axial direction of the base member extends along a vertical direction. A lower end side of the base member at the time of the immersion is arranged in a downstream side of the housing in the first conveying direction and an upper end side of the base member at the time of the immersion is arranged in an upstream side of the housing in the first conveying direction.

Abstract: A developer supply container detachably mountable to a developer supplying apparatus includes a pump portion provided to act at least on said developer discharging chamber and having a volume changeable with expansion and contraction with reciprocation, the cam groove for converting the rotational force received by a gear into a force for decreasing the volume of pump portion, a cam groove for converting the received force into a force for increasing the volume of the pump portion, a cam groove not converting the received force for operating the pump portion, and a phase detecting portion for stopping the rotation of a feeding portion using one of said cam grooves.

Abstract: An image forming apparatus includes a toner case, an opening/closing member, a lever member, a drive transmission mechanism, and a biasing member. The toner case is attached to an apparatus main body. The opening/closing member opens and closes a toner discharge outlet formed in the toner case. The lever member is operated between a first operation position and a second operation position for the opening/closing member to be moved to a closing position corresponding to the first operation position or to an opening position corresponding to the second operation position. The drive transmission mechanism transmits, to the opening/closing member, a driving force input by operation of the lever member. The biasing member biases the opening/closing member toward the closing position when the lever member is at the first operation position, and biases the opening/closing member toward the opening position when the lever member is at the second operation position.

Abstract: The disclosure relates to devices and methods for remanufacturing printer cartridges by forming toner fill openings in the printer cartridges.

Abstract: An image forming apparatus includes an alternating transformer that splits an alternating voltage into a first alternating voltage and a second alternating voltage, a developer bias application unit, an alternating voltage shutoff unit, and a discharge starting voltage measurement unit. The developer bias application unit applies a pulsed sleeve roller voltage composed of a first alternating voltage superimposed on a first direct voltage to a sleeve roller and also applies a second alternating voltage and a second direct voltage separately to a magnetic roller in order to apply a pulsed magnetic roller voltage composed of the second alternating voltage superimposed on the second direct voltage. The alternating voltage shutoff unit stops applying the second alternating voltage to the magnetic roller. The discharge starting voltage measurement unit increases the alternating voltage of the alternating transformer to measure the discharge starting voltage between the sleeve roller and magnetic roller.

Abstract: Provided is a transfer member having high durability, and an image forming apparatus which enables stable forming of an image with high image quality for a long period of time. The transfer member is an endless belt shape transfer member for constituting an image forming apparatus of an electrophotographic type, in which a surface layer is formed on a base and the surface layer comprises a cured (meth)acrylic resin which is obtained by curing of polyfunctional (meth)acrylate according to a polymerization reaction using a photopolymerization initiator comprising of an acylphosphine oxide compound represented by the following General Formula (1): [in General Formula (1), n and m each represents an integer of 1 to 2 (with the proviso that, the relationship of m+n=3 is satisfied), and X1 and X2 each represents an alkyl group, a phenyl group which may have a substituent group, or an alkoxy group].

Abstract: According to one embodiment, an image forming apparatus includes a power supply unit that outputs a transfer bias voltage, and a transfer unit that electrostatically transfers a toner image onto a sheet using a transfer bias voltage applied by the power supply unit, and has a transfer resistance value larger than 4.0×107 ?.

Abstract: An image forming apparatus includes a transfer device to transfer a toner image onto a recording medium with a transfer bias applied thereto, a recording medium conveyor to deliver the recording medium to a transfer region while controlling an alignment of the recording medium having entered the transfer region in alignment control, and a transfer bias controller to obtain a toner adhesion amount information on a post-alignment-control toner image that passes through the transfer region after the recording medium is free from the alignment control, and to reduce, when the toner adhesion amount per unit area is less than a predetermined amount, the transfer bias after the alignment control is released to a level less than that of a transfer bias that is applied when the toner image having a same toner adhesion amount passes through the transfer region before the recording medium is free from the alignment control.

Abstract: A transferring device includes a conveying belt, a transferring roller, a stretching roller and a guide member. The conveying belt comes into contact with an image carrier carrying a toner image and conveys a sheet via a contact position to the image carrier. The transferring roller takes applying of voltage with a reversed polarity to a charged polarity of the toner forming the toner image and transfers the toner image carried on the image carrier onto the sheet at the contact position. The stretching roller stretches the conveying belt at a downstream side from the contact position in a conveying direction of the conveying belt and at a separation position of the sheet separated from the conveying belt. The guide member is arranged at a position facing to the sheet conveyed from the stretching roller to a fixing device to take applying of the voltage with the reversed polarity.

Abstract: The fixing device includes a fixing member heated from inside; and a pressing member forming a fixing nip with the fixing member. A toner image transferred on a sheet is heated and pressed so as to be fixed on the sheet at the fixing nip through which the sheet is nipped and conveyed. The fixing member includes, on an inner circumferential surface thereof, a heat absorbing layer containing heat-conductive fillers oriented in a direction intersecting with a conveying direction of the sheet.

Abstract: A cylindrical film used in an image heating device heating a recording material, on which an image has been formed, has a resin layer, this resin layer being made from a resin in which a crystalline resin and an amorphous resin having a higher glass transition temperature than the crystalline resin are blended, wherein a volume ratio of the crystalline resin with respect to the amorphous resin in the resin layer is 70/30 to 99/1.

Abstract: An image forming device includes: a photosensitive drum; a first roller; a second roller; an intermediate transfer belt; a transfer roller; a cleaner; a waste toner accommodating portion; and a paper guide. The intermediate transfer belt is looped around the first roller and the second roller to circularly move in a moving direction. The intermediate transfer belt contacts the photosensitive drum. The transfer roller is disposed opposite to the first roller with respect to the intermediate transfer belt. The cleaner collects waste toner on the intermediate transfer belt. The cleaner is disposed upstream of the photosensitive drum in the moving direction and downstream of the transfer roller in the moving direction. The waste toner accommodating portion accommodates the waste toner collected by the cleaner. The paper guide guides a recording medium and disposed between the cleaner and the waste toner accommodating portion.

Abstract: In accordance with one embodiment, an image forming apparatus comprising a printer section configured to include a first image forming section which forms a monochrome image with inerasable coloring agent and a plurality of color image forming sections at least one of which forms a color image with erasable coloring agent; and a control section configured to control the printer section so that the printer section operates in a first mode of forming a monochrome image through the first image forming section, a second mode of forming an erasable image with the erasable coloring agent, and a third mode of forming an image through the first image forming section and the plurality of color image forming sections.

Abstract: A fixing device includes an endless belt rotatable in a predetermined direction of rotation and a nip formation assembly disposed opposite an inner circumferential surface of the endless belt. An opposed rotary body is pressed against the nip formation assembly via the endless belt to form a fixing nip between the endless belt and the opposed rotary body through which a recording medium bearing a toner image is conveyed. A belt holder contacts and supports each lateral end of the endless belt in an axial direction thereof. The belt holder is isolated from the opposed rotary body with a first interval interposed therebetween in the axial direction of the endless belt.

Abstract: A induction heating unit is configured to inductively heat a heating member being rotated in a predetermined rotating direction by magnetic flux. The induction heating unit includes a housing, a magnetic flux generating source, a core member and a securing member. The magnetic flux generating source is fixed to the housing so as to extend in a sheet width direction intersecting the rotating direction and is configured to generate the magnetic flux. The core member is made of magnetic material, is secured to the housing and is configured so as to make a magnetic path through which the magnetic flux passes. The securing member is made of thermal contraction material and is contracted by being heated at predetermined temperature to secure the core member to the housing.

Abstract: In accordance with one embodiment of the present invention, an image forming apparatus comprises: a first image forming section configured to form an image on a image receiving member with a first decolorable recording material the color of which can be thermally decolored; and a second image forming section configured at the downstream side in the advancement direction of the image receiving member than the first image forming section to form an image on the image receiving member with a second decolorable recording material higher than the first decolorable recording material in decoloring temperature.

Abstract: In accordance with one embodiment, an image forming apparatus with a first printing device configured to carry out printing with a non-decolorable recording material, second printing device configured to carry out printing with a decolorable recording material, the color of which is same or same color system of the color of the non-decolorable recording material; and an identification mark adding section configured to add, to a record receiving member printed by at least one of the first printing device and the second printing device, an identification mark indicating which one of the first and second printing devices is used for printing.

Abstract: An image forming apparatus having a first power state and a second power state in which power consumption is lower than in the first power state includes a detection unit configured to detect an object present in a vicinity of the image forming apparatus, an receiving unit configured to receive a user's operation, a control unit configured to, if the object is detected by the detection unit or if the receiving unit receives the user's operation, shift the image forming apparatus from the second power state to the first power state, and a display unit configured to, if the image forming apparatus is shifted from the second power state to the first power state in response to receipt of the user's operation by the receiving unit, display information indicating that there is dust adhering to the detection unit.

Abstract: An image forming apparatus has a patch forming unit, a reversing unit, a patch detecting unit, and a fixing condition correcting unit. The patch forming unit forms a patch for fixability test on conveyed paper by a fixing roller having a fixing condition set corresponding to the execution of a print job. The reversing unit reverses the paper on which the patch for fixability test is formed from the front surface to the back surface through a reversing and conveying path. The patch forming unit detects a characteristic value of the patch for fixability test of the reversed paper using a medium sensor which detects the characteristic value of the back surface of the paper. The fixing condition correcting unit corrects the fixing condition based on the detected characteristic value of the patch for fixability test.