Abstract: The quality of an image recorded on electronic paper is improved. Specifically, electronic paper for displaying an image is supplied in a region in which an electric field is generated in the thickness direction of the electronic paper, the electronic paper having charged color particles and being used for displaying an image as a result of charged color particles migrating in the thickness direction. Voltage for generating an electric field in the region is controlled by a voltage control section so that the value of the voltage varies together with time. The quality of an image recorded on electronic paper can thereby be improved.

Abstract: An ultraviolet irradiation device includes: a light source which irradiates ultraviolet curable ink with ultraviolet rays; and a jetting port which jets gas to form a gas film facing the light source in an irradiation direction.

Abstract: An ultraviolet irradiation device includes: a light source which irradiates ultraviolet curable ink with ultraviolet rays; and a jetting port which jets gas to form a gas film facing the light source in an irradiation direction.

Abstract: An ultraviolet irradiation device includes: a light source which irradiates ultraviolet curable ink with ultraviolet rays; and a jetting port which jets gas to form a gas film facing the light source in an irradiation direction.

Abstract: A printing system includes a temporary-curing light source radiating temporary-curing light to dots formed on a medium, and a complete-curing light source radiating complete-curing light to the dots irradiated with the temporary-curing light and having a wavelength band different from that of the temporary-curing light source. In the printing system described above, ink used for forming the dots includes at least two types of photopolymerization initiators which photopolymerize a monomer when being irradiated with light, and the two types of photopolymerization initiators have absorption peaks at different wavelengths.

Abstract: A stainless steel sheet useful as a separator for a low-temperature fuel cell has the surface state that a lot of fine projections (p) stand close together around many fine pits (d) formed over a whole surface. The surface state is realized by alternating electrolytic etching in a ferric chloride solution. When the stainless steel separator is built in a fuel cell, contact resistance between the separator and a graphite electrode is kept at a lower level even in a corrosive atmosphere. Consequently, the fuel cell can be driven with high power-generating efficiency over a long term even under severely corrosive conditions without generation of massive Joule heat.

Abstract: A charger includes: a first charging member that contacts an image carrier and a second charging member that contacts the image carrier downstream from the first charging member. At the time of image formation, a voltage higher than the discharge start voltage of the first charging member is applied to the first charging member and a voltage lower than the discharge start voltage of the second charging member and lower than the voltage applied to the first charging member is applied to the second charging member, and at the time when an image is not formed, a voltage lower than the discharge start voltage of the first charging member is applied to the first charging member and a voltage higher than the discharge start voltage of the second charging member and higher than the voltage applied to the first charging member is applied to the second charging member.

Abstract: A printing apparatus which prints an image on a medium, including a head which discharges ink droplets from nozzles, wherein the medium is transparent, two pieces of image data are prepared, one piece of image data is selected from the two pieces of image data to set the selected image data to one of a first image and a second image, the other piece of image data is set to the other of the first image and the second image, the image data set to the first image is subjected to a processing to be mirror image data, and the head prints the mirror image of the first image on the medium, prints a background image on the mirror image of the first image, and prints a real image of the second image on the background image.

Abstract: Provided is a printing apparatus for printing an image on a medium, which is transported in a transport direction, by forming dots by ejecting ink from a plurality of nozzles while moving the nozzles in an intersecting direction that intersects the transport direction. The printing apparatus has a first printing mode for printing a mirror image of a predetermined image as the image on the medium and a second printing mode for printing a positive image of a predetermined image as the image on the medium, the medium being a transparent medium. The first printing mode is different from the second printing mode in at least one of a transportation operation of transporting the medium and a dot-forming operation of forming the dots by ejecting ink while moving the nozzles.

Abstract: An apparatus for printing an image on a transparent medium based on a selected mode, the apparatus includes: a head that ejects ink droplets from nozzles, wherein when a first mode is selected, the head prints a first image on the transparent medium, prints a background image on the first image, and prints a second image which is different from the first image on the background image, and wherein when a second mode is selected, the head prints a second image on the transparent medium, prints a background image on the second image, and prints a first image on the background image.

Abstract: A fluid ejecting apparatus includes: a rotating body which rotates while holding a medium at its circumferential surface; a fluid ejecting section which ejects fluid toward the medium such that a margin is not formed at an end portion of the medium on the circumferential surface in an axial direction of the rotating body; an absorber which absorbs fluid which has come out of the end portion of the medium on the circumferential surface in the axial direction, out of fluid ejected from the fluid ejecting section, at a position further outside than the end portion; and a rotating body driving mechanism for rotating the rotating body, which drives the rotating body such that driving force by the rotating body driving mechanism is not transmitted to the absorber.

Abstract: An image forming apparatus includes a developer bearing member for transporting developer to an opposing position opposing an image bearing member. Regularly-disposed concave sections are formed on a surface of the developer bearing member. An alternating voltage that includes a first voltage for moving developer from the developer bearing member toward the image bearing member, and a second voltage for moving developer from the image bearing member toward the developer bearing member is applied to the developer bearing member. A cycle period of the alternating voltage is larger than a minimum width of the concave section in a circumferential direction of the developer bearing member divided by a moving velocity of a surface of the rotating developer bearing member.

Abstract: An image forming apparatus includes a developer bearing member for transporting developer to an opposing position opposing an image bearing member. Regularly-disposed concave sections are formed on a surface of the developer bearing member. An alternating voltage that includes a first voltage for moving developer from the developer bearing member toward the image bearing member and a second voltage for moving developer from the image bearing member toward the developer bearing member is applied to the developer bearing member. A cycle period of the alternating voltage is smaller than or equal to a minimum width of the concave section in a circumferential direction of the developer bearing member divided by a moving velocity of a surface of the rotating developer bearing member.

Abstract: Provided is an image forming apparatus which includes a cylindrical image carrier, on which at least an electrostatic latent image is formed, and a charge roller for non-contact charging the image carrier with a predetermined charge gap, and applies at least an alternating current (AC) voltage to the charge roller to non-contact charge the image carrier, wherein a predetermined number of partition members for partitioning an internal space of the image carrier into a plurality of sub-spaces are arranged at a central position of an axial direction of the image carrier or in the vicinity of the central position of the axial direction of the image carrier, in the image carrier.

Abstract: A fluid ejecting device includes a transporting member for transporting a medium in a transporting direction, a fluid ejecting head for ejecting fluid containing a color material onto the medium, an irradiating unit provided on the downstream side of the fluid ejecting head in the transporting direction to cure the fluid by irradiating the fluid on the medium with ultraviolet rays, and a charge applying member for applying charges to the color material of the fluid on the medium before irradiation of the fluid with the ultraviolet rays.

Abstract: An image forming device. A direct voltage power supply is independently provided for each charging device for each color, and an alternating voltage power supply is commonly provided to the charging device for each color. A current detecting section detects current which flows between each image carrying body and each charging device. A control device judges that the image carrying body is damaged when a detected current value is not less than a preliminarily set specified value when a direct voltage is sequentially independently applied to the charging device for each color when leakage of charging voltage is generated.

Abstract: Provided is an image forming apparatus which includes a cylindrical image carrier, on which at least an electrostatic latent image is formed, and a charge roller for non-contact charging the image carrier with a predetermined charge gap, and applies at least an alternating current (AC) voltage to the charge roller to non-contact charge the image carrier, wherein a predetermined number of partition members for partitioning an internal space of the image carrier into a plurality of sub-spaces are arranged at a central position of an axial direction of the image carrier or in the vicinity of the central position of the axial direction of the image carrier, in the image carrier.

Abstract: A fluid ejecting apparatus includes a rotatable drum that holds a medium on a periphery thereof, a head that ejects a fluid onto the medium held by the drum, a fixing portion that fixes the fluid ejected from the head onto the medium, an outer-radius measuring portion that measures an outer radius of the drum, an adjusting portion that adjusts a distance between the drum and the head, and a controller that causes the adjusting portion to adjust a distance between the head and the medium in accordance with a variation in the outer radius of the drum measured by the outer-radius measuring portion.

Abstract: A fluid ejecting apparatus includes a drum that rotates while holding a medium on its outer periphery, a head that ejects a fluid on to the medium held on the periphery of the drum, a fixing section that fixes the fluid ejected on to the medium by the head, a measuring section that measures a diameter of the drum, and a controller that varies an ejection timing of the fluid ejected from the head in accordance with variation in the diameter of the drum measured by the measuring section.

Abstract: A charger includes: a charging brush which is rotatably provided and is brought into contact with an image carrier to charge the surface of the image carrier; a charging roller which is brought into contact with the image carrier at a portion on the downstream side relative to the charging brush in the rotational direction of the image carrier to charge the surface of the image carrier; and a controller which controls voltages applied to the charging brush and charging roller, wherein the controller controls voltages applied to the charging brush and charging roller such that one-fifth of the absolute value of a charging brush current flowing between the image carrier and charging brush is lower than the absolute value of a charging roller current flowing between the image carrier and charging roller.