Abstract: An inkjet printer, including a recording head having a nozzle to jet ink droplets, a control section to control jetting of the ink droplets from the nozzle of the recording head at predetermined driving conditions for jetting the ink droplets, a velocity detecting section to detect ink droplets jetting velocity from the nozzle of the recording head, a temperature detecting section to detect temperature of the recording head or ambient temperature of the recording head, a first changing section to change the driving conditions to alter the ink droplets jetting velocity to a targeted velocity based on detected results of the velocity detecting section, and a second changing section to change the driving conditions at a time differing from a time of the first changing section to alter the ink droplets jetting velocity to the targeted velocity based on the detected results of the temperature detecting section.

Abstract: A platen on which a recording medium advances, of an inkjet recording apparatus, having: a grooved section formed in a direction perpendicular to a feeding direction of the recording medium on the platen, to receive oversprayed ink jetted onto the recording medium from a recording head; and a supporting member which moves up to a supporting position and supports the recording medium when the recording medium crosses over the grooved section, wherein the supporting member prevents the recording medium from falling into the grooved section and maintains a stable distance between the recording medium and the recording head.

Abstract: A platen on which a recording medium advances, of an inkjet recording apparatus, having: a grooved section formed in a direction perpendicular to a feeding direction of the recording medium on the platen, to receive oversprayed ink jetted onto the recording medium form a recording head; and a supporting member which moves up to a supporting position and supports the recording medium when the recording medium crosses over the grooved section, wherein the supporting member prevents the recording medium from falling into the grooved section and maintains a stable distance between the recording medium and the recording head.

Abstract: An inkjet recording apparatus including: a recording head; a recording medium moving section; a position information detecting section synchronized with a movement of the recording medium moving section; a mark recording section for recording a mark on the recording medium; a mark detecting section for detecting the mark recorded; an analog-to-digital conversion section for converting an output signal; and a control section for obtaining a reference mark position of the mark based on a signal outputted from the mark detecting section and the position information detected, and for determining the amount of recording medium movement on the basis of reference detection position of the mark; wherein analog-to-digital conversion is applied to the output signal from the mark detecting section to get a sampling data, in exact timing with an output of position information, and the control section calculates the reference detection position from the sampling data.

Abstract: There is described an ink-jet printer, which emits ink particles onto a recording medium to prints an image on the recording medium, and in which moving velocities of the ink particles are detected to perform stable emitting actions of the ink particles. The ink-jet printer includes: an ink-jetting head having a plurality of nozzles from which the ink particles are emitted; a velocity detecting section to detect moving velocities of the ink particles by measuring detection times at each of which each of the ink particles is detected; a calculating section to calculate an average value of the detection times measured by the velocity detecting section; and a head-drive controlling section that compares the average value calculated by the calculating section with a target value established in advance, to change a driving condition for the ink-jetting head so that the average value coincides with the target value.

Abstract: An ink jet printer for printing a frameless image on a recording medium, having an image data input section, a recording section having a nozzle for ejecting an ink based on the image data, a carriage for reciprocating the recording section in a primary scanning direction, a recording medium moving section for moving the recording medium in a sub-scanning direction, a detection sensor provided on the carriage for detecting the recording medium, wherein a detection position is set on upstream side of the nozzle. The printer further has a first memory for storing the image data received, a masking section for applying masking processing to image data corresponding to outside of the recording medium in accordance with recording medium existence information, and a control section for controlling to print an image on the recording medium by using the image data applied the masking processing.

Abstract: A microscopic droplet detecting device for detecting a passage of droplets jetted from a nozzle of an ink jetting device, including a droplet detecting section including a paired light emitting and receiving elements, a jet control section to control the ink jetting device to jet droplets serially along the traveling course, and a jetting condition detecting section to detect a jetting condition of the nozzle based on the output signal.

Abstract: An inkjet recording apparatus having therein:

Abstract: A platen on which a recording medium advances, of an inkjet recording apparatus, having:

Abstract: There is described an ink-jet printer, which emits ink particles onto a recording medium to prints an image on the recording medium, and in which moving velocities of the ink particles are detected to perform stable emitting actions of the ink particles. The ink-jet printer includes: an ink-jetting head having a plurality of nozzles from which the ink particles are emitted; a velocity detecting section to detect moving velocities of the ink particles by measuring detection times at each of which each of the ink particles is detected; a calculating section to calculate an average value of the detection times measured by the velocity detecting section; and a head-drive controlling section that compares the average value calculated by the calculating section with a target value established in advance, to change a driving condition for the ink-jetting head so that the average value coincides with the target value.

Abstract: A microscopic droplet detecting device for detecting a passage of droplets jetted from a nozzle of an ink jetting device, comprising:

Abstract: In an ink jet printer provided with a printing head having an ink chamber, a piezoelectric element and a nozzle tip; the printer is further provided with a drive signal generating circuit for generating drive signals corresponding to image information, a temperature sensor for measuring the temperature of the printing head; and a heating signal generating circuit for generating a heating signal on the basis of the temperature of the printing head measured by the temperature sensor. The piezoelectric element vibrates in response to the heating signal and generates heat so that the ink in the ink chamber is heated.

Abstract: A driving apparatus for a printer, includes: a first memory for successively storing pixel data by one pixel on the basis of data of a plurality of bits constituting one pixel which represents gradation, which are inputted in parallel, and after storing a predetermined number of pixel data, for outputting in parallel the stored pixel data; a position information signal outputting device provided in accordance with each of outputs from the first memory for outputting a position information signal within a pixel according to each pixel data of the first memory; and a recording device provided in accordance with each of outputs from the position information signal outputting device and driven according to the position information signal within the pixel.

Abstract: An image recording apparatus of the present invention comprises: an image processing means for compensating the color and gradation of an inputted color image; a monochromatic CRT; a display means for successively inputting color images, having a plurality of colors, into the monochromatic CRT, and for displaying a plurality of images on the monochromatic CRT as monochromatic images; an optical system for forming the monochromatic image, displayed on the monochromatic CRT, onto a color photographic paper; a plurality of color filters, which are selectively inserted between the monochromatic CRT and the color photographic paper, and convert the monochromatic image into a plurality of monochromatic color images; an exposure luminance setting means for each separation color; and an emitting luminance control means.

Abstract: An ultrasonic sensor detects the time of rise of the first of transmitted waves and also detects peak points Po appearing in the waveform of received waves to detect a waveform reference point where the time-base coordinate of a phantom envelope connecting these peak points Po is a minimum. The time T2 of rise of the first of the received waves is calculated by adding a predetermined period of offset time To to the time t2 of the waveform reference point of the received waves to calculate the elapsed time .DELTA.T from the time of rise of the first transmitted wave to the time of rise of the first received wave. The distance L to an object of measurement is calculated based on the result of calculation. The distance L to the object can be calculated alternatively based on the elapsed time .DELTA.T' from a waveform reference point of the transmitted waves to the waveform reference point of the received waves.

Abstract: A robot for cleaning a floor of a railroad vehicle has a robot body equipped with a cleaning mechanism and includes a travel mechanism controllable for locomotion in a desired direction. The robot also includes a distance detecting arrangement directed at least toward the front and opposite sides of the robot body for measuring the distance to an obstacle or a wall, and a map storing arrangement which has stored therein a cleaning region of the floor previously as a two-dimensional map. The robot also includes a path storing arrangement which has stored therein a predetermined path of travel for cleaning the floor as expressed in coordinates on the map. A first control arrangement is provided for recognizing the coordinates of the position of the robot body on the map based on outputs from the distance detecting arrangement when the robot body is placed at an end portion of the floor.