Abstract: A damper device includes a hollow case main body provided with an opening, a pressure sensitive film attached to the case main body so as to cover the opening, demarcates a liquid storage chamber together with the case main body, and is flexibly deformable internally toward, or externally away from, the liquid storage chamber, an inlet that is in the case main body, is in communication with the liquid storage chamber, and allows the liquid to flow into the liquid storage chamber, an injection outlet that is in the case main body, is in communication with the liquid storage chamber, and allows the liquid to flow out toward the liquid injector, an elastic member coupled with the pressure sensitive film to flexibly deform the pressure sensitive film externally away from the liquid storage chamber, and a pressure receiving plate that is located between the pressure sensitive film and the elastic member and includes a discontinuously joined portion that is discontinuously joined with the pressure sensitive film.

Abstract: In an inkjet printer, from one side of a main scanning direction, first through fourth ultraviolet irradiation devices arrayed in the main scanning direction at least partially overlap first and second recording heads. A distance in the main scanning direction between a middle position in the main scanning direction of the first recording head and a middle position in the main scanning direction of the first ultraviolet irradiation device is equal to a distance in the main scanning direction between the middle position of the first recording head and a middle position in the main scanning direction of the second ultraviolet irradiation device.

Abstract: A three-dimensional printing device includes an optical device and a controller that controls the optical device. The controller includes a dividing section that divides an area of a vat that is irradiated with light of a projector into a plurality of blocks, a counting section that counts a number of times of irradiation with light of the projector, a first determination section that determines whether or not the number of times counted by the counting section has reached a predetermined threshold value, a light output section that changes when it is determined by the first determination section that the number of times has reached the predetermined threshold value from a first energy to a second energy lower than the first energy an energy of light to be output from the projector to the photo-curable resin of the block for which determination has been made.

Abstract: A self-weight pressure control valve includes a hollow case main body with an opening, a partitioning wall dividing the case main body into first and second pressure chambers in communication with the opening, a communication opening in the partitioning wall and communicating the first pressure chamber and the second pressure chamber to each other, a valve rod including a rod portion inserted through the communication opening to pass the partitioning wall, and a valve portion located in the first pressure chamber, and a pressure sensitive film covering the opening of the case main body, coupled with a tip of the rod portion of the valve rod, and flexibly deformable toward the rod portion. When the pressure sensitive film is not flexibly deformed toward the rod portion, the communication opening is maintained in a closed state by the valve portion by use of a self-weight of the valve rod.

Abstract: A reading apparatus includes an illuminator illuminating an optical symbol with blue light, an imager taking an image of the optical symbol illuminated with the blue light, and a controller including a receiving circuit receiving the image taken by the imager, a determination circuit determining whether or not the received image has a resolution equal to or higher than a predetermined reading resolution, an image acquisition circuit acquiring the received image as image data if the determination circuit determines that the received image has a resolution equal to or higher than the reading resolution, and a light adjusting circuit changing an illumination condition of the blue light if the determination circuit determines that the received image has a resolution less than the reading resolution.

Abstract: In a slice image creation device, a peeling processor performs peeling on a peeling line segment in a circulation direction of the peeling line segment. When the peeling reaches an intersection at which line segments of contours cross each other, an intersection information acquisition processor acquires intersection information including an intersection angle defined at the intersection by the peeling line segment and each candidate line segment connected to the intersection in a direction that is the same as the circulation direction of the peeling line segment. A transfer processor sets one of the candidate line segments that has the smallest intersection angle as the line segment to which the peeling is going to be transferred next from the peeling line segment at the intersection.

Abstract: A three-dimensional printing apparatus includes a controller to control first and second projectors that apply equal or substantially equal total amounts of optical energy. The controller performs first and second projecting operations. The first projecting operation involves simultaneously projecting first and second cross-sectional sub-images from the first projector onto first and second areas of an image projecting surface, respectively, and the second and third cross-sectional sub-images from the second projector onto the second and third areas of the image projecting surface, respectively. The second projecting operation involves simultaneously projecting the first cross-sectional sub-image from the first projector onto the first area and the third cross-sectional sub-image from the second projector onto the third area. The controller equalizes the number of times the first to third cross-sectional sub-images are to be respectively projected onto the first to third areas.

Abstract: In an ink supply system, a main ink tank and an ink head are connected together via a main supply channel. A sub-ink tank is connected to the main supply channel via a sub-supply channel. An upstream-side valve is provided on an upstream-side portion of the main supply channel. During standby, a first standby setting processor of a controller sets a first standby state in which a first upstream-side valve is open, and a second standby setting processor sets a second standby state in which the first upstream-side valve is closed. A standby state determination processor determines whether or not the amount of time elapsed from when a setting operation was done by the first standby setting processor or the second standby setting processor is greater than or equal to a first amount of time. The standby state switching processor switches between the first standby state and the second standby state when it is determined that the elapsed time is greater than or equal to the first amount of time.

Abstract: An ink cartridge of an inkjet printer includes a support holding an ink container so that a longitudinal direction of a main body of the ink container extends along a sub-scanning direction of the inkjet printer, and supporting a portion of the main body that is perpendicular or substantially perpendicular to a thickness direction of the main body such that the main body is supported horizontally. A central portion of the support is lower in height than a left portion and a right portion thereof with respect to a main scanning direction of the inkjet printer.

Abstract: A liquid injection device includes a driving signal correction circuit correcting a reference driving signal based on a temperature detected by a temperature sensor. The driving signal correction circuit includes a first correction circuit that corrects injection pulses excluding a liquid drop injection speed-controlling injection pulse when the temperature detected by the temperature sensor is lower than or equal to a predetermined reference temperature, and a second correction circuit that corrects all of the injection pulses when the temperature detected by the temperature sensor is higher than the predetermined reference temperature.

Abstract: A self-weight pressure control valve includes a hollow case main body with an opening, a partitioning wall dividing the case main body into first and second pressure chambers in communication with the opening, a communication opening in the partitioning wall and communicating the first pressure chamber and the second pressure chamber to each other, a valve rod including a rod portion inserted through the communication opening to pass the partitioning wall, and a valve portion located in the first pressure chamber, and a pressure sensitive film covering the opening of the case main body, coupled with a tip of the rod portion of the valve rod, and flexibly deformable toward the rod portion. When the pressure sensitive film is not flexibly deformed toward the rod portion, the communication opening is maintained in a closed state by the valve portion by use of a self-weight of the valve rod.

Abstract: A three-dimensional printing system calculates a resin amount required to print a three-dimensional object by curing a liquid photo-curable resin and sequentially stacking layers of the cured resin each having a predetermined cross-sectional shape. The system includes a first storage section configured to store information of a three-dimensional object, and information of an auxiliary member that supports the three-dimensional object, a first calculation section configured to calculate a resin amount necessary to print the three-dimensional object and a resin amount necessary to print the auxiliary member based on the information of the three-dimensional object and the auxiliary member stored in the first storage section, an output section configured to output a first resin amount that is the sum of the calculated resin amounts necessary to print the three-dimensional object and the auxiliary member, and a three-dimensional printing apparatus.

Abstract: A three-dimensional printing apparatus that forms a three-dimensional object using cross-sectional shapes of the object includes a controller that is configured or programmed to include a dividing unit that divides a cross-sectional shape into a plurality of blocks, a shape determining unit that determines whether one of the blocks has a predetermined shape and defines the block having the predetermined shape as a characteristic block, a count determining unit that determines whether the proportion of the number of the characteristic blocks to the total number of the blocks is equal to or greater than a predetermined proportion, and a light application unit that sets the energy of light from a light source to a first energy or to a second energy being lower than the first energy depending on the proportion, when applying the light to a photocurable resin in a region corresponding to the characteristic blocks.

Abstract: A stamping device includes a stamping data generator configured to create stamping data to form a stamp image on a surface of a processing target, a positioning data generator configured to create positioning data to position the processing target, and a controller configured or programmed to control an operation of the processing tool. The controller includes a first controller configured or programmed to control the processing tool such that stamping is performed, based on the positioning data at a first stamping energy, on the processing target including a protective sheet attached thereto in a predetermined area including a stamping area where the stamp image is to be formed, and a second controller configured or programmed to control the processing tool such that stamping is performed, based on the stamping data at a second stamping energy equal to or different from the first stamping energy, on the processing tool in a state of having the protective sheet peeled off therefrom.

Abstract: An inkjet printer includes a cap to forma sealed space between the cap and a nozzle surface when attached to an ink head so as to cover the nozzle surface, a cleaning solution tank to accommodate a cleaning solution to clean the cap, a motor to cause the cap to move between a capping position, at which the cap covers the nozzle surface, and a cleaning position, at which the cap sinks in the cleaning solution accommodated in the cleaning solution tank.

Abstract: A damper device includes a hollow case main body provided with an opening, a pressure sensitive film attached to the case main body so as to cover the opening, demarcates a liquid storage chamber together with the case main body, and is flexibly deformable internally toward, or externally away from, the liquid storage chamber, an inlet that is in the case main body, is in communication with the liquid storage chamber, and allows the liquid to flow into the liquid storage chamber, an injection outlet that is in the case main body, is in communication with the liquid storage chamber, and allows the liquid to flow out toward the liquid injector, an elastic member coupled with the pressure sensitive film to flexibly deform the pressure sensitive film externally away from the liquid storage chamber, and a pressure receiving plate that is located between the pressure sensitive film and the elastic member and includes a discontinuously joined portion that is discontinuously joined with the pressure sensitive film.

Abstract: A liquid supply system includes a liquid supply source, an injection head, a damper in communication with the injection head, a liquid supply path including an end in communication with the liquid supply source and another end in communication with the damper, a liquid supply device supplying the liquid from the liquid supply source toward the damper, a pressure control valve provided between the liquid supply source and the liquid supply device, and a controller controlling the liquid supply device to be actuated or to be stopped. The pressure control valve closes the liquid supply path while the liquid supply device stopped.

Abstract: A liquid injection device includes a liquid injection head and a controller that generates a driving signal including first through fourth driving pulses in one liquid drop injection period and supplies the driving signal to the liquid injection head. The discharge time period of each of the first and second driving pulses is preferably set to about (½)×Tc. The start timing of the second driving pulse is preferably set to about m×Tc (m?1) after the start of the first driving pulse. The second ink drop is preferably set to be injected at a speed of the first ink drop or higher. The start timing of the third driving pulse is preferably set to about (n+(½))×Tc (n?1) after the start of the second driving pulse. The start timing of the fourth driving pulse is preferably set to about p×Tc (p?2) after the start of the third driving pulse. The fourth ink drop is injected at a speed of the third ink drop or higher.

Abstract: A liquid supply system includes a liquid supply source, an injection head, a damper in communication with the injection head, a liquid supply path including an end in communication with the liquid supply source and another end in communication with the damper, a liquid supply device supplying the liquid from the liquid supply source toward the damper, a pressure control valve provided between the liquid supply source and the liquid supply device, and a controller controlling the liquid supply device to be actuated or to be stopped. The pressure control valve closes the liquid supply path while the liquid supply device stopped.

Abstract: An image projection system includes a second transform matrix calculator that calculates a second projection transform matrix usable to projection-transform first intersection coordinates into intersection coordinates uniformly or substantially uniformly distributed in a first area and calculates a third projection transform matrix usable to projection-transform second intersection coordinates into intersection coordinates uniformly or substantially uniformly distributed in a second area; and an image corrector that transforms image data on a first divided image by use of the second projection transform matrix, transforms image data on a second divided image by use of the third projection transform matrix, and translates at least one of the first divided image and the second divided image toward a borderline between the first divided image and the second divided image to delete a gap between the first divided image and the second divided image.