Abstract: A printing system includes a printing device having paper trays. Each paper tray includes loaded paper and has one or more paper tray settings. The paper tray settings are defined for each paper tray. A paper tray setting is defined to reconfigure an installed paper tray to apply the setting. The reconfiguration of the paper tray is delayed until an action is completed, such as opening the paper tray to load the paper corresponding to the paper tray setting or the current print job is complete. After the action, the paper tray setting is applied to reconfigure the paper tray. Printing operations are enabled using the reconfigured paper tray.

Abstract: A sheet cassette includes a first trailing edge regulator integrally formed with a cassette frame to regulate a position of a trailing edge of a first sized sheet in a feeding direction, and a second trailing edge regulator integrally formed with the cassette frame to regulate a position of a trailing edge of a sheet of a second size stored in the cassette frame in the feeding direction. A pair of side edge regulation members regulate positions of side edges of the sheet of the first size stored in the cassette frame in the width direction at a first position and regulate positions of side edges of the sheet of the second size stored in the cassette frame in the width direction at a second position.

Abstract: A sheet conveying device includes a sheet loader, a sheet feeder, an optical sensor, and a rotary member. The sheet loader is configured to load a sheet. The sheet feeder is configured to feed the sheet loaded on the sheet loader. The optical sensor is configured to detect the sheet at a predetermined position on the sheet loader in a width direction of the sheet and at a predetermined position in a sheet conveyance passage in the width direction of the sheet. The rotary member is configured to rotate to a first position when the sheet is not at the predetermined position on the sheet loader and a second position when the sheet is at the predetermined position. The rotary member has a detection target portion configured to be detected by the optical sensor when the rotary member is located at the first or second position.

Abstract: An image forming apparatus includes a cartridge including an abutting portion and an apparatus main body. The apparatus main body includes a mounting portion of the cartridge, a fixing portion for fixing the toner image, an attachable/detecting mechanism of the cartridge, a shutter, and a moving member. The attachable/detecting mechanism includes an acting member movable between a first position and a second position by the mounting of the cartridge. The shutter is movable between a closed position and an open position, and a moving member moves both the shutter and the acting member and includes an abutted portion. When the cartridge is moved, the moving member is moved by abutment of the abutting portion of the cartridge with the abutted portion, the acting member moves from the first position to the second position, and the shutter moves from the closed position to the open position.

Abstract: An image forming apparatus includes a feeder, a conveyance section, an image forming section, a light emitter, a light receiver, a measuring section, and a permeation depth calculator. The feeder feeds a sheet. The conveyance section conveys the sheet. The image forming section forms an image on the sheet conveyed by the conveyance section using an ink. The light emitter emits near-infrared light to the sheet with the image thereon. The light receiver receives reflected light of the near-infrared light. The reflected light has been reflected by the sheet with the image thereon. The measuring section measures a received light quantity of the reflected light. The permeation depth calculator calculates a permeation depth of the ink permeating the sheet based on the received light quantity.

Abstract: A reading apparatus includes a transport unit that transports a document along a transport path, a multi feed detection unit that detects multi feed for a transport document that is the document being transported by the transport unit, a reading unit that reads the transported document, and a controller that controls the transport unit, wherein the controller acquires a multi feed length that is a length of a range in which multi feed occurs in the transported document according to a detection result of multi feed by the multi feed detection unit, causes the transport unit to stop transport of a document following the transport document by when the multi feed length is equal to or greater than a predetermined threshold value for the multi feed length, and causes the transport unit to perform transport of the following document when the multi feed length is less than the threshold value.

Abstract: An image forming apparatus includes an image carrier that carries an image, a developing unit that applies a developing voltage to develop an electrostatic latent image formed on the image carrier with a developer, a transfer unit that electrostatically transfers the image onto media of different types, and a development controller that controls a developing operation of the developing unit. The development controller has a first control mode for a first medium, and a second control mode for a second medium having a lower transferability than the first medium. In the first control mode, the developing unit applies the developing voltage according to a first developing condition. In the second control mode, the developing unit applies the developing voltage according to a second developing condition in which a developing property is reduced as compared with the first developing condition.

Abstract: The present invention provides an image forming method for forming a decorated image having a resin layer and a powder contacted with each other, the method including: forming a resin layer on a recording medium; and supplying a powder onto the recording medium, in which the recording medium has a surface with an arithmetic mean height Sa of 1.000 or more.

Abstract: An image forming apparatus includes: a control panel to receive selection of a print job from a user; a sensor to detect a state of an expendable of the image forming apparatus; an image forming device to form an image on a recording medium; and a processor to: control the control panel to display a saving setting screen for setting saving of the expendable in the print job, based on information indicating a state of the expendable at the time of executing the print job and a print condition of print data indicated by the print job; and execute the print job according to saving setting of the expendable that is set using the saving setting screen, to control the image forming device to form an image of the print data.

Abstract: A printing apparatus includes a reading unit, having a detection surface, that reads an image on a print medium, and a fixing unit that fixes a relative position between the detection surface and the print medium in one of a first state, in which the detection surface is in contact with the print medium, and a second state, in which the detection surface is not in contact with the print medium. A control unit stops conveyance and fixes the relative position between the detection surface and the print medium to the first state, using the fixing unit, in a case in which the reading unit reads the image, and changes the relative position between the detection surface and the print medium from the first state to the second state, using the fixing unit, and resumes conveyance after image reading by the reading unit is complete.

Abstract: An image forming apparatus includes an image transfer unit configured to transfer an image formed on an image carrier to a sheet, according to a transfer control parameter, and a transfer control unit. The transfer unit is configured to set the transfer control parameter to a first value when a first portion of the image is being transferred to a first area of the sheet and to a second value when a second portion of the image is being transferred to a second area of the sheet transfers an image formed on an image carrier to a sheet.

Abstract: An atmosphere sensor includes a detecting element configured to detect external atmospheric characteristics of the atmosphere sensor. The atmosphere sensor includes inside a case having an opening, to contain the detecting element; and a moisture permeable film located on the opening to pass external water vapor of the atmosphere sensor. The moisture permeable film is bonded to the case by a welding method.

Abstract: An image forming apparatus includes an image formation processor to perform image formation to a recording medium with a primary color toner and a secondary color toner that is different from the primary color toner, a database to store multiple setting values, each of which corresponding a combination of a mode type depending on the primary color toner and the secondary color toner and a media type of the recording medium and being applied to a process of the image formation performed by the image forming processor, a database retriever to retrieve an optimum setting value from the multiple setting values stored in the database according to a specified combination of the mode type and the media type, and an operation setting arranger to perform the image formation based on the optimum setting value acquired from the database retriever.

Abstract: A printer includes a surface preparatory material remover. The remover is configured with a pad mounted to a roller to engage selectively the surface preparatory material on a surface of a rotating member to remove a portion of the surface preparatory material outside of an area where an ink image is formed to reduce the adhesion of media to the rotating member surface as the media exits a nip in which the ink image is transferred to the media.

Abstract: According to one embodiment, a system for a decoloring information management of a decoloring apparatus includes an decoloring processing unit, a sheet conveying unit, a sheet reading unit, a user ID reading unit, a storing unit configured to store a predetermined information, and a control unit. A sheet on which an image is formed with an decolorable colorant is subject to decoloring processing. The sheet conveying unit conveys the sheet and causes the sheet to pass through the decoloring processing unit. The sheet reading unit is arranged further on an upstream side than the decoloring processing unit. The user ID reading unit reads ID information of a user. The storing unit stores predetermined information. The control unit controls the storage unit to correlate the user ID and the read information by the sheet reading unit.

Abstract: A sheet type detection device includes an image reading circuit, a surface property determination circuit, a thickness determination circuit, and a sheet type identifying circuit. The image reading circuit reads a document image to generate image data. The surface property determination circuit determines a sheet surface condition of a sheet type detection target based on the image data generated by the image reading circuit. The thickness determination circuit determines a sheet thickness of the sheet based on the image data generated by the image reading circuit. The sheet type identifying circuit identifies a sheet type based on the determination result of the surface property determination circuit and the determination result of the thickness determination circuit.

Abstract: An image processing apparatus includes a communication unit configured to communicate with a printing apparatus, and a first controller configured to generate a first print job designating one of a plurality of sheet trays of the printing apparatus, and a second print job not designating any one of the plurality of sheet trays of the printing apparatus. A printing apparatus includes an image forming unit, an operation unit, and a second controller configured to determine whether a print job received from the image processing apparatus is the first print job or the second print job. When the first print job is received, the second controller controls the image forming unit to execute the first print job using the sheet tray designated by the first print job, while when the second print job is received, it is executed using a sheet tray designated through the operation unit.

Abstract: A recording material detecting apparatus includes a light guiding unit that allows first and second light to enter a surface of a recording material, respectively, in two directions which are not parallel; an imaging device that images a first light irradiated area and a second light irradiated area, on the surface of the recording material; and an output device that outputs information on a surface condition of the recording material based on an output of the imaging device. When viewed in a direction along the center optical axes of first and second light sources which are of the same type, the first and second light sources are arranged such that the respective reference lines of the rotational phases around the center optical axes are rotated in opposite directions by approximately the same angles from a line perpendicular to the direction where the first and second light sources are arrayed.

Abstract: An image forming apparatus, which forms an image at an image forming interval and feeding timing corresponding to a predetermined recording material size, includes a control unit (a controller unit and an engine control unit) for controlling the feeding timing to be earlier, when the size of a recording material detected by a detection unit (the engine control unit and an registration sensor) is smaller than the predetermined recording material size.

Abstract: A sheet feeder having: a base portion configured to support thereon a stack of sheets piled on top of another; a blower configured to blow air to the stack of sheets supported on the base portion so as to float one or more sheets in an uppermost portion of the stack of sheets; a suction/feed system located above the base portion, the suction/feed system configured to suck the sheet floated by the blower and to feed the sheet in a predetermined feeding direction; a photographic device configured to take a picture of the one or more sheets floated by the blower; and an illuminating device configured to emit light to the one or more sheets floated by the blower a plurality of times during one exposure process carried out by the photographic device.

Abstract: An image forming apparatus includes a body, a paper feed cassette, a rotary operating member, an engaging portion, engaged portions, and a size detection switch. The rotational operating member is rotatable. The engaging portion engages the rotary operating member with the paper feed cassette. Any one of the engaged portions is engaged by the engaging portion. The size detection switch is used to detect the size of a recording medium stored in the paper feed cassette. The rotational operating member includes a pressure portion that activates the size detection switch. The rotational force in the first direction necessary for causing the engagement to be released is greater than the rotational force in the second direction necessary for causing the engagement to be released.

Abstract: A recording material detecting apparatus includes a light guiding unit that allows first and second light to enter a surface of a recording material, respectively, in two directions which are not parallel; an imaging device that images a first light irradiated area and a second light irradiated area, on the surface of the recording material; and an output device that outputs information on a surface condition of the recording material based on an output of the imaging device. When viewed in a direction along the center optical axes of first and second light sources which are of the same type, the first and second light sources are arranged such that the respective reference lines of the rotational phases around the center optical axes are rotated in opposite directions by approximately the same angles from a line perpendicular to the direction where the first and second light sources are arrayed.

Abstract: A sheet feeding device includes a sheet accommodating unit supported by an apparatus main body in an insertable and withdrawable manner in a direction orthogonal to a feeding direction of the sheets, a leading edge regulating unit provided fixedly to the sheet accommodating unit, a trailing edge regulating unit provided in the sheet accommodating unit, a side edge regulating unit provided in the sheet accommodating unit, and an insertion position limiting unit configured to contact a frame on a rear of the apparatus main body in an inserting direction of the sheet accommodating unit to limit an insertion position of the sheet accommodating unit, wherein the insertion position limiting unit is arranged on a rear of the sheet accommodating unit and on an upstream of a position of center of gravity of the sheet accommodating unit along a sheet feeding direction.

Abstract: A difference is arisen in the electric potential of the electrode layer between a fixed end portion and a displacement end portion of an actuator. The electrode layer includes a bundle of polymer fibers containing a conductive material. Longitudinal directions of the polymer fibers are arranged parallel to a direction from the fixed portion to the displacement end portion of the actuator.

Abstract: A punching processing apparatus includes: a punching scrap collection member that is disposed at a position where punching scraps produced after punching a sheet drop; a punching scrap housing unit that is disposed in the punching scrap collection member and movable in a horizontal direction; a registration detection unit that is movable in a width direction of the sheet for detecting a positional deviation amount of the sheet in the width direction when a position of the sheet in the width direction is adjusted so as to meet a punching position, wherein punching scraps accumulated in the punching scrap housing unit are shaken and flattened out by causing the punching scrap housing unit to move in the horizontal direction in coordination with the movement of the registration detection unit.

Abstract: A conveying apparatus or an image forming apparatus includes: a housing including an opening and closing member that can be opened and closed; a conveying path that conveys an object to be conveyed, at least a part of the conveying path being provided adjacent to an inner side of the opening and closing member; a first detector that detects whether the object is present in a predetermined region and outputs a detection signal corresponding to a result of the detection; and an interlocking mechanism that causes, when the opening and closing member is opened, the first detector to change at least one of a position and a structure of the first detector in mechanically association with movement of opening of the opening and closing member, and to output a detection signal which is the same as a detection signal output when the object is present in the predetermined region.

Abstract: An image forming apparatus includes a storage unit, a conveyance unit, an opening, and a movement unit. The storage unit stores, in an apparatus body of the image forming apparatus, a sheet having an image. The conveyance unit conveys the sheet having the image to the storage unit. The opening exposes the stored sheet to an outside of the apparatus body. The movement unit is movable to a first position where the sheet conveyed to the storage unit can be stored in the storage unit and a second position. The stored sheet is moved when the movement unit moves from the first to the second position, and is stopped in an exposed state where a part of the sheet is exposed to outside the apparatus body from the opening. The movement unit moves from the second to the first position when the sheet is in the exposed state.

Abstract: According to an embodiment, an image forming apparatus has an image forming unit, a transfer unit, a fixing unit, a first conveying path, a second conveying path, and a control unit. The image forming unit forms a toner image. The control unit controls execution of a print-less sheet passing processing in which, in a state where a toner image forming operation of the image forming unit is stopped, the first conveying path and the second conveying path convey a sheet to the transfer unit again through the transfer unit and the fixing unit. The control unit controls the execution of the toner image forming operation to the sheet subjected to the print-less sheet passing processing.

Abstract: A printing apparatus according to an aspect of the present invention includes a plurality of sheet feed trays, stores sheet information including property information indicating a property of a sheet and sheet feed tray information indicating a sheet feed tray to which the sheet is allowed to be assigned, and selects a sheet feed tray from the plurality of sheet feed trays based on a designation made by a user. The printing apparatus further displays a sheet allowed to be assigned to the selected sheet feed tray based on the stored sheet information and assigns, to the selected sheet feed tray, a sheet designated by the user from among the displayed sheets.

Abstract: A printing apparatus which makes it possible to reduce time and labor required by the operator for paper assignment and suppress occurrence of an operation error during execution of the paper assignment. The printing apparatus is provided with a plurality of paper feeders for containing papers. Information on types of papers to be contained in the respective paper feeders is set as a paper assignment configuration. The printing apparatus selects a specific paper assignment configuration, based on an instruction from the operator, from paper assignment configurations stored in a storage device. The selected specific paper assignment configuration is set as the current paper assignment configuration.

Abstract: An image forming apparatus includes an image forming unit, a sheet conveying unit, a TOD (Top of Data) control module for instructing the image forming unit to start generation of a toner image, a timing roller driving module for instructing the sheet conveying unit to start driving of the timing roller, an image synchronization module designed depending on the sheet conveying unit and the image forming unit, and a sheet information module for generating an image synchronization identifier for designating a pattern of image synchronization control related to printing of the toner image on the sheet, depending on a type of the sheet designated. The image synchronization module is activated when the formation of the toner image on the sheet has become possible, and activate each of the TOD control module and the timing roller driving module, with a relative time lag based on the image synchronization identifier.

Abstract: In an embodiment, a processor-readable medium stores code representing instructions that when executed by a processor cause the processor to receive sheet length data for two paper sheets of a same standard dimension passing consecutively through a printing device. The processor calculates a length difference between the two paper sheets, and when the length difference exceeds a two-sheet threshold, it initiates an alignment correction cycle in a paper finishing device.

Abstract: An image reading apparatus includes: a reading unit; a feeding unit; a carriage; a motor-side transmission gear for transmitting power from a motor; a carriage-side transmission gear for transmitting the power to the carriage; a feeding unit-side transmission gear for transmitting the power to the feeding unit; a switching gear switched between a meshing state with the carriage-side transmission gear at a carriage-side position and a meshing state with the feeding unit-side transmission gear at a feeding unit-side position; and a control device for performing: a first switching process for meshing the switching gear with the feeding unit-side transmission gear; a second switching process for meshing the switching gear with the carriage-side transmission gear; and an initialization process of the reading unit.

Abstract: An original reader capable of being downsized without requiring a large-capacity image memory. A conveying path conveys an original. Sensors are arranged on the conveying path, for detecting the conveyed original. CCD line sensors read the conveyed original. A CPU of the image reader decides the size of the conveyed original based on the results of detection by the sensors. An image memory stores image data output from the line sensors. The CPU transmits the decided original size and the stored image data to a controller. When the CPU cannot decide the original size at a predetermined timing, it transmits one of original size candidates to the controller, as a provisional original size. When the size of the original decided afterwards is different from the provisional original size, the CPU retransmits the decided size of the original.

Abstract: An image forming apparatus includes an image forming unit forming an image on a recording sheet; a transport unit transporting the recording sheet; a support surface supporting the recording sheet; a rotating member having an outer peripheral surface pressed against the support surface and rotationally following the recording sheet when the recording sheet passes through between the support surface and the outer peripheral surface; an ascertaining unit ascertaining a length of the recording sheet on the basis of an amount of rotation of the rotating member; and a restricting unit restricting a movement of the rotating member that moves toward the support surface after the recording sheet passes through between the support surface and the outer peripheral surface, the restricting unit preventing the outer peripheral surface, which comes into contact with the recording sheet, and the support surface from coming into contact with each other.

Abstract: A sheet conveying apparatus includes a sheet conveying unit that conveys a sheet including a drive roller, a driven roller, and a rotary encoder provided on a rotational axle of one of the drive roller and the driven roller; a conveying amount measuring unit that measures a conveying amount of the sheet; a first detection unit positioned downstream of the sheet conveying unit, the first detection unit being positioned apart from the drive roller and the driven roller not to overlap with the drive roller and the driven roller in the conveying direction; a second detection unit positioned upstream of the sheet conveying unit; and a conveying distance calculation unit that calculates a conveying distance of the sheet based on the measured result by the conveying amount measuring unit and the detected results detected by the first detection unit and the second detection unit.

Abstract: An image erasing apparatus includes a scanning unit; a memory unit; an erasing unit; a first conveying unit includes a first conveying direction as a conveying direction of the sheet; a storage unit that stores the sheet which is scanned by the scanning unit and is not conveyed to the erasing unit by the first conveying unit; a second conveying unit that once conveys the sheet from the first conveying unit to the storage unit, then return the sheet to the first conveying unit; and an interface unit that displays the image data stored in the memory unit and receives an instruction from a user, when the instruction for erasure is received, the interface unit operates the first conveying unit and the second conveying unit so as to conveys to the erasing unit, the sheet stored in the storage unit.

Abstract: An image forming apparatus has an intermediate transfer member onto which an image is transferred, a transfer part transferring the image formed on the intermediate transfer member onto a transfer, a detection part detecting a transfer which is conveyed, a both-surface conveying part reversing the transfer with an image being formed on a first surface, and conveying the transfer to the transfer part again, and a control wherein a timing when forming an image on a second surface of the transfer by the image forming part is set based on a time necessary to reverse the transfer material and a size in a conveying direction of a transfer material.

Abstract: An image reading apparatus includes a reading unit, a feeding unit, a carriage holding the reading unit, a motor, a motor-side transmission gear, a feeding unit-side transmission gear, a carriage-side transmission gear, a switching gear which switches between a meshing state of meshing with the feeding unit-side transmission gear at a feeding unit-side position and a meshing state of meshing with the carriage-side transmission gear at a carriage-side position, a restraint member which applies a restraint force for restraining the switching of the switching gear, and a motor control unit which when switching the switching gear between the carriage-side position and the feeding unit-side position, executes a large torque control of controlling the motor to generate a switching torque which is larger than a moving reading torque to be generated by the motor at a time of document reading when executing a moving reading.

Abstract: A conveying device includes a first feeder that rotatably supports a roll sheet and feeds the roll sheet to a conveying path, a second feeder that feeds a cut sheet to the conveying path, and a controller that determines whether a sheet fed to the conveying path is the roll sheet or the cut sheet based on the relationship between movement of the sheet fed to the conveying path and rotation of the roll sheet.

Abstract: A sheet conveying apparatus includes a sheet conveying unit that conveys a sheet; a conveying amount measuring unit that measures a conveying amount of the sheet conveyed by the sheet conveying unit; a first detection unit that detects the sheet downstream of the sheet conveying unit in a conveying direction of the sheet; a second detection unit that detects the sheet upstream of the sheet conveying unit in the conveying direction of the sheet; and a conveying distance calculation unit that calculates a conveying distance of the sheet based on the measured result by the conveying amount measuring unit and the detected results detected by the first detection unit and the second detection unit.

Abstract: An image forming apparatus has a sheet size detecting unit with first and second arms each moved by contact with a moving sheet, the arms disposed at differing locations in a direction orthogonal to sheet movement. An actuator which acts on the sensor is not moved when only one arm is moved by sheet contact, but is moved when both arms are moved by sheet contact so that the sensor output level when only one arm is moved is the same as when neither arm is moved, and the output level of the sensor when both of arms have moved differs from when neither arm moves. The first and second arms have first and second regulating portions, respectively, for regulating actuator movement, and the actuator is moved only when both regulating portions are moved from contact of both arms with the moving sheet.

Abstract: Printing processing is performed on a sheet having a characteristic value within a range of a characteristic value of a sheet which is defined usable in the printing processing in accordance with a specific print job. Specifically, in a case where a test page print job is input, a CPU selects a sheet feeding tray on which sheets having a characteristic value within a range of a characteristic value represented by characteristic value range information. The CPU performs a control operation so that a sheet is fed from the selected sheet feeding tray to a printer unit and the printer unit executes the test page print job.

Abstract: An effective image area can be properly corrected in accordance with the quantity of light from an irradiation unit by selecting, as the effective image area, pixels having light quantities more than or equal to a threshold value that allows accurate acquisition of a surface image of a recording medium, on the basis of a light quantity distribution of the light from the irradiation unit. This reduces the influence of mounting accuracy of the irradiation unit, and allows the recording medium to be identified accurately.

Abstract: A recording media deciding apparatus has: a light radiating portion which radiates light having a uniform light amount on a range corresponding to an image capturing range of a first surface of a bundle of recording media; a light detecting portion which captures an image of light emitted from a second surface different from the first surface of the bundle of the recording media; and a controller which decides on a type of the recording media based on an output of the light detecting portion.

Abstract: An edge detecting device for detecting an edge of a moving recording medium includes a reflecting unit that includes a reflecting surface having reflectance higher than that of the recording medium, light sources that irradiate the recording medium and the reflecting surface of the reflecting unit with light, a light receiving unit that includes pixels of a photoelectric conversion element provided in a width direction of the recording medium and receives reflected light that has been emitted from the light sources and has been reflected by the recording medium and the reflecting surface of the reflecting unit on the pixels of the photoelectric conversion element, and a control unit that determines a region of the pixels of the photoelectric conversion element that make output higher than a previously set determination threshold value to be the edge of the recording medium on the light receiving unit.

Abstract: A position detection apparatus includes: a moving member in contact with a detection object that moves following movement of the detection object; and a support member that rotatably supports the moving member; a detection unit that detects a positional change of the moving member, the moving member being acted on by a first force as a force to press the moving member against the detection object, a second force as a force to press the moving member substantially in a direction of a rotation shaft of the moving member, and a third force as a force to press the moving member in a direction substantially orthogonal to the direction of the rotation shaft of the moving member.

Abstract: A scanner comprises a first gear assembly on a frame, a stationary scan surface having a first width, and a scan module having a length substantially less than the first width. The scan module includes a second gear assembly configured to move the scan module, in a first orientation generally perpendicular to the first width, in a first scanning path relative to a first width portion of the scan surface and in a second, non-duplicative scanning path relative to a second width portion of the scan surface. The second gear assembly is releasably engageable to the first gear assembly to selectively shift the scan module, in a second orientation generally perpendicular to the first orientation, between the respective first and second scanning paths.

Abstract: A method for automatically adapting a write cycle to a movement of a web-shaped medium in a digital printing machine, as a function of the thickness of the web-shaped medium guided around first and second transport or guide rollers, includes providing the first and second transport or guide rollers having a known diameters, the diameter of the second being different from the diameter of the first. A rotational speed ratio N(T) between the first and second transport or guide rollers (9, 11) is determined while the printing material (6) is guided around the transport or guide rollers (9, 11). The write cycle is determined at least with the use of the previously determined rotational speed ratio N(T).

Abstract: A sheet material identification device includes a humidity adjuster, a detector, and a controller. The humidity adjuster adjusts the humidity of a sheet material by causing the sheet material to either release or absorb moisture. The detector detects the humidity of the sheet material before and after the adjustment of the humidity. The controller calculates a first difference in humidity of the sheet material before and after the adjustment of the humidity, and identifies the type of sheet material on the basis of the first difference.