Abstract: A light scanning apparatus, including: an optical box configured to hold a deflector and an optical member; and a cover, the optical box including: a concave-shaped cut-away portion formed from a top portion of a side wall toward a bottom portion; and a connecting wall which stands from the bottom portion of the optical box and is bent and branched from the cut-away portion to an inside of the optical box so as to cross over the cut-away portion, the cover including a dustproof member sandwiched between the cover and the side wall and between the cover and the connecting wall which a cable passes, wherein a height of a distal end of the connecting wall, which the cable passes, from the bottom portion is larger than a height of a base portion of the cut-away portion from the bottom portion.

Abstract: In a case in which a difference between a total value of numbers of ink discharge times for a target divided region and a representative value of the numbers of ink discharge times for a plurality of divided regions adjacent to the target divided region is large, the total value of the numbers of ink discharge times for the target divided region is reduced.

Abstract: According to the embodiments, there is provided an erasing apparatus and an image-forming apparatus. The erasing apparatus prints a mark including printing information of a sheet before erasing processing on the sheet after erasing processing. The image-forming apparatus performs control such that an image to be printed is suppressed to be formed on an area on which a large number of images have been printed in the sheet before the erasing processing.

Abstract: An image forming apparatus includes a liquid discharge head, a temperature detector, a memory, and a controller. The temperature detector detects a temperature of the liquid discharge head. The memory stores the temperature of the liquid discharge head detected with the temperature detector. The controller controls a bubble purge operation to purge bubbles in the liquid discharge head. When a current temperature of the liquid discharge head acquired by the temperature detector is higher than a stored temperature stored in the memory and a deviation of the acquired current temperature and the stored temperature is equal to or more than a predefined threshold value, the controller executes control to execute the bubble purge operation, and when the current temperature acquired by the temperature detector is lower than the stored temperature, the controller executes control to update the stored temperature stored and retained in the memory with the acquired current temperature.

Abstract: An inkjet head comprising ink flow paths each including a nozzle in communication with a pressure chamber. Pressurizing sections vary pressure on the ink in the respective pressure chambers. Each of the ink flow paths has a natural frequency of a first-order mode and the ink and has a natural frequency of a second-order mode which is higher than the natural frequency of the first-order mode. Each of the pressurizing sections varies the pressure on the ink for a predetermined time corresponding to the natural frequency of the first-order mode, so that a predetermined volume of ink is discharged when a shift of a fluid level of the ink due to pressure oscillation of the second-order mode is superposed on a shift of a fluid level of the ink due to pressure oscillation of the first-order mode.

Abstract: A liquid droplet ejecting apparatus executes multi-pass recording constituted of N scan passes including a scan pass for an outward path and a scan pass for a return path (N being an integer of 2 or more). When a proportion of executions of dot recording using a first liquid in each scan pass is made a first recording ratio, and a proportion of executions of dot recording using a second liquid in each pass is made a second recording ratio, the first recording ratio and the second recording ratio are set such that, in a first half of the N scan passes, a total ratio of the first recording ratio is larger than a total ratio of the second recording ratio, and in a second half of the N scan passes, a total ratio of the second recording ratio is larger than a total ratio of the first recording ratio.

Abstract: There is provided a liquid ejection device including a head for ejecting a liquid, a liquid containing unit, a liquid filler, and a pressure adjusting unit, in which the liquid containing unit includes a sealed housing and a flexible member provided in the housing, the housing includes a first containing space communicating with the head and a second containing space partitioned from the first containing space through use of the flexible member, the first containing space contains the liquid, and the liquid filler is filled into the second containing space, the pressure adjusting unit communicates with the second containing space, and adjusts the pressure of the liquid filler filled into the second containing space so as to maintain a negative pressure with respect to the head.

Abstract: A method for determining an issue in an inkjet nozzle with impedance measurements, includes taking a first impedance measurement to detect a drive bubble with an impedance sensor; and taking a second impedance measurement to detect said drive bubble with said impedance sensor after said first impedance measurement.

Abstract: A method of printing a two-dimensional bit-mapped image having a number of pixels per row for printing using a plurality of overlapping printheads or a printhead or printheads indexed through overlapping positions, the or each printhead having a row of ejection channels, each ejection channel having associated ejection electrodes, the method comprising: applying a voltage to the ejection channels sufficient to cause concentration of particles in the printing fluid at the ejection channels, applying voltage pulses of respective predetermined amplitude and/or duration, as determined by respective image pixel bit values, to the electrodes of the selected ejection channels in order to cause volumes of printing fluid to be ejected from selected ejection channels of the overlapping printheads, thereby forming a pixel of a predetermined optical density, adjusting, for each row of the image, the values of the voltage pulses to be applied to the overlapping printheads to form pixels printed by overlapped ejection chan

Abstract: An image forming apparatus includes a first detector to detect the image forming apparatus being driven by an AC adapter, a second detector to detect the image forming apparatus being driven by a battery, a third detector to detect an occurrence of power failure, and a first device to shut down a power supply of the image forming apparatus in a case of the power failure.

Abstract: An image forming apparatus includes an image forming device, a threshold comparator, a first image compensator, and a second image compensator. The first compensator executes a processing of, for at least a pixel value less than a threshold, setting a value of stopping discharge of a droplet from a defective nozzle in converting multi-valued data of an input image into n-value data, and spreading a quantization error due to setting the value, to neighboring pixels of a pixel corresponding to a defective nozzle. The second compensator executes a processing of replacing a smaller dot among dots around the defective nozzle with a larger dot by pattern matching using a mask pattern in accordance with a dot size and placement around the defective nozzle, on condition that as a result of comparison of the comparator, the pixel value corresponding to the defective nozzle is equal to or more than the threshold.

Abstract: A printer includes a light source module including an ejecting head that ejects a UV ink onto a medium. The UV ink hardens when irradiated with a UV light ray. The light source module includes an irradiator that irradiates the UV ink with the UV light ray. The printer may include a guide shaft to/from which the light module is attachable/detachable and a driving controller that performs control of the irradiator. The light source module includes, in addition to the irradiator, a memory module that stores therein information indicating a light irradiation feature of the irradiator. The driving controller performs control of the irradiator by using the information indicating a light irradiation feature of the irradiator.

Abstract: The invention provides an ink containing a polyurethane polymer which has units respectively derived from a polyisocyanate, a polyether polyol having no acid group and a diol having an acid group and has an acid value of 40 mg KOH/g or more and 140 mg KOH/g or less, a carbon black and at least one antioxidant selected from compounds represented by the general formulae (1) to (3).

Abstract: Disclosed is a printing apparatus that performs printing onto a print medium including a transporting device that transports a print medium, a plurality of printing heads, a photographing unit that photographs the print medium, a shift detecting chart forming device, and a correcting device. The shift detecting chart forming device forms a shift detecting chart having a first line segment group consisting of first line segments that are printed onto the print medium at given intervals in an orthogonal direction with respect to the transportation direction with a reference printing head, and a second line segment group formed along the first line segment group, and consisting of second line segments that are printed with a subsequent printing head. The correcting device corrects a printing timing with the subsequent printing head relative to the reference printing head in accordance with a density variation of the photographed shift detecting chart.

Abstract: A handheld inkjet printer includes an inkjet print head and a tip. One or more sensors measure the position of points on a curved surface that are physically touched by the tip while the tip is moved relative to the surface. Based on these measurements, a computer generates or modifies a computer model that specifies at least (i) position of the curved surface, and (ii) a target region of the curved surface on which a pattern is to be printed. In addition, the one or more sensors measure position and orientation of nozzles in the print head, while the handset is moved relative to the surface. The computers also calculate, based on the computer model and these additional measurements, which of the nozzles to fire at a different times, such that the pattern is printed on the target region as the handset is moved relative to the surface.

Abstract: An inkjet recording apparatus includes a plurality of line heads disposed along a conveyance direction of a recording sheet and including a plurality of nozzles to discharge ink droplets, the plurality of nozzles disposed in a direction perpendicular to the conveyance direction of the recording sheet; a plurality of edge sensors corresponding to respective line heads, to detect a lateral edge of the recording sheet; a plurality of actuators corresponding to the respective line heads, to move to the respective line heads laterally in a sheet width direction; a head position adjustor to determine movement amounts of the respective line heads in accordance with outputs of the plurality of edge sensors; and a failure determiner to obtain outputs of the plurality of edge sensors simultaneously and identify a failure of the plurality of edge sensors based on a combination of the outputs from the plurality of edge sensors.

Abstract: An ultraviolet image pattern is created on a recording medium having florescence properties and a first color by electronically creating a first electronic pattern ink, the first electronic pattern ink including a second color, holes, and a first pattern, the holes representing areas in the first electronic pattern ink wherein the second color is absent; electronically creating a second electronic pattern ink, the second electronic pattern ink including the second color, holes, and the first pattern, the holes of the second electronic pattern ink representing areas in the second electronic pattern ink filled with a third color, the third color being equal to the first color; electronically creating an electronic image region having a background and a foreground; electronically painting, using the first electronic pattern ink, the background of the electronic image region; electronically painting, using the second electronic pattern ink, the foreground of the electronic image region; and rendering, using marki

Abstract: A transfer lamination method uses a transfer lamination device including a transfer ribbon comprising a transfer film on a carrier web, a print unit comprising a print head, and a transfer unit configured to transfer a film section of the transfer film to a substrate. In the method, the transfer ribbon is fed in a feed direction past the print unit and the transfer unit. Tension is generated in the transfer ribbon using the print head while processing the transfer ribbon using the transfer unit.

Abstract: An inkjet printer includes an inkjet head including nozzles arranged in a first direction, a head scanning mechanism moving the inkjet head along a second direction perpendicular to the first direction, a feeding mechanism feeding the recording medium along the first direction, and a storage device storing upstream correction information and downstream correction information. A controller performs a first determination process for determining a correction value for a specific scanning operation by using the upstream correction information when an image is printed on an upstream area adjacent to a specific area corresponding to the specific scanning operation and when no image is printed on a downstream area adjacent to the specific area, and a second determination process for determining the correction value by using the downstream correction information when no image is printed on the upstream area and when an image be printed on the downstream area.

Abstract: There is provided a data processing apparatus, a printing apparatus and a data processing method, that can reduce a processing load and a processing time in reading data even in a case where null data is added to print data for correcting displacement of a printing position caused by inclination of a print head. To achieve this, there is provided a data processing apparatus including a first writing unit, a second writing unit and a reading unit. The reading unit reads out data arrays corresponding to the print target image and does not read out data arrays corresponding to outside of the print target image in the first storage unit, from a plurality data arrays stored in the second storage unit that have been written in by the second written in unit.