Patent application number | Description | Published |
20090002424 | INK JET PRINTING APPARATUS AND METHOD - A method for controlling a printing position for a printing apparatus for using a plurality of printing heads to print an image is provided. This method prevents, even when a conveyed print medium has deformation such as deflection, a printing position of a print medium from being dislocated. To realize this, components | 01-01-2009 |
20090003854 | RECORDING APPARATUS AND METHOD FOR CONTROLLING THE RECORDING APPARATUS - A recording apparatus includes a recording unit configured to record an image on a recording medium, a roller configured to convey the recording medium, a first signal generation unit configured to generate a first period signal according to a movement of the recording medium, a second signal generation unit configured to generate a second period signal according to a rotation of the roller, a correction unit configured to correct the first period signal when a period value of the first period signal is outside a predetermined range, an information generation unit configured to generate variation information of a moving speed of the recording medium based on the first period signal, and a control unit configured to control recording on the recording medium based on the variation information and the second period signal. | 01-01-2009 |
20090058904 | PRINTHEAD AND PRINTING APPARATUS USING THE PRINTHEAD - The first and second selection signals for selecting one of print data and n pulse signals stored in a shift register are latched. The first or second selection signal is selected in accordance with an input selection information switching signal, and one of the n input pulse signals is selected based on the selected signal. A heat pulse selection circuit outputs the selected pulse signal as a heat pulse signal. The level of the selection information switching signal switches midway to switch the selected pulse signal. Parts of two pulse signals before and after switching are combined to generate a heat pulse signal. | 03-05-2009 |
20090123197 | IMAGE FORMING APPARATUS - An image forming apparatus includes first and second image bearing members on which a toner images are to be formed; a conveying member onto which the toner images are to be transferred; a conveying member position index detecting device for detecting a conveying member position index provided on the conveying member along the movement direction of the conveying member; an image bearing member position index detecting device for detecting the image bearing member position indices provided on the second image bearing member along a rotational direction of the second image bearing member; an adjusting device for adjusting a rotational speed of the second image bearing member; a controller for controlling the adjusting device so as to adjust a position of an image bearing member position index correspondingly to the conveying member position index, on the basis of detection results of the conveying member position index detecting device and the image bearing member position index detecting device; and an initializing portion for performing an initializing operation of the adjusting device when an amount of deviation between the conveying member position index and the corresponding image bearing member position index is out of a predetermined range. | 05-14-2009 |
20100150632 | RECORDING APPARATUS AND RECORDING METHOD - A recording apparatus that performs recording by ejecting ink onto a recording medium from a plurality of recording heads include a conveying roller that conveys the recording medium that is continuously fed; the plurality of recording heads arranged in the conveying direction of the conveying roller; a skew sensor that detects the amount of displacement of the position of the recording medium skewed in the widthwise direction perpendicular to the conveying direction relative to the recording heads when the recording medium is skewed with respect to the conveying direction; and an angle adjusting mechanism that rotates the recording heads relative to the recording medium on the basis of the amount of displacement detected by the skew sensor. | 06-17-2010 |
20100201732 | PRINTING APPARATUS AND CONTROL METHOD OF THE PRINTING APPARATUS - In an ink jet printing apparatus using a plurality of printing heads arranged in a convey direction of a printing medium, an inclination angle of the printing medium to a predetermined convey direction is detected to adjust, in accordance with the resultant inclination angle, timings at which ink is jetted from the plurality of printing heads. This allows, even when the printing medium being subjected to a printing operation has a slight meander shape, an image to be formed on a printing medium so that printing positions of the plurality of printing heads have no dislocation. | 08-12-2010 |
20100238224 | INK JET PRINTING APPARATUS AND METHOD - A method for controlling a printing position for a printing apparatus for using a plurality of printing heads to print an image is provided. This method prevents, even when a conveyed print medium has deformation such as deflection, a printing position of a print medium from being dislocated. To realize this, components | 09-23-2010 |
20110199417 | RECORDING APPARATUS AND METHOD FOR CONTROLLING THE RECORDING APPARATUS - A recording apparatus includes a recording unit configured to record images on a recording medium of a roll-type, the recording unit including a plurality of line-type recording heads, a first conveyance roller, located at an upstream side of the plurality of line-type recording heads, a second conveyance roller, located at a downstream side of the plurality of line-type recording heads, a first signal generation unit, including a laser doppler speed meter for detecting a surface of the recording medium being conveyed, a second signal generation unit, including a rotary encoder, a correction unit configured to correct the first signal when a period value of the first signal is outside a predetermined range, an information generation unit, and a control unit configured to control recording on the recording medium based on the variation information and the second signal so as to suppress adverse effects caused by the first conveyance roller. | 08-18-2011 |
20120301168 | IMAGE FORMING APPARATUS AND CONTROLLING METHOD THEREFOR - An image forming apparatus includes a first station including a first photosensitive drum; a second station including a second photosensitive drum; an intermediate transfer member for receiving the first toner image from the first drum and the second toner image from the second drum sequentially; a first sensor configured to detect a first index image, on the intermediate transfer member; a second sensor for detecting a second index image on the second drum; a controller for controlling a peripheral speed of the second drum; an executing device for executing a test mode in which a first inclined test index image, and a second test inclined index image, wherein the controller controls image forming conditions for the first and second index images in accordance with outputs of the first second sensors in the test mode. | 11-29-2012 |
20130002790 | IMAGE FORMING APPARATUS EQUIPPED WITH LASER LIGHT SOURCE - An image forming apparatus improved in the accuracy of detecting a time period over which a laser beam is scanned. A laser beam emitted from a laser light source is deflected by a polygon mirror such that the laser beam scans a photosensitive drum. The deflected laser beam is guided onto the photosensitive drum via an imaging lens. A mode hop detection unit detects a mode hop of the laser beam. An image pulse generation section detects a main scanning magnification of an electrostatic latent image formed on the photosensitive drum. When a mode hop is detected, the main scanning magnification in a next scanning cycle is corrected using a correction value stored in a storage unit and used most lately, whereas when no wavelength variation has not detected, the main scanning magnification in the next scanning cycle is corrected using the latest correction value. | 01-03-2013 |
20140233990 | IMAGE FORMING APPARATUS - A first position information formed on an conveyance body is read by an information detecting portion, and a second position information formed on a second image carrier is read by the information detecting portion. A control is made such that a position of an image on the second image carrier matches with a position of an image on the conveyance body from information read by the information detecting portion in transferring the image from the second image carrier to the conveyance body. The information detecting portion is held by a hold member and are disposed at a transfer region. | 08-21-2014 |
20140314432 | IMAGE FORMING APPARATUS - In an image forming apparatus, in the case where a time necessary for a developer bearing member to rotate from a measurement position where an attracting unit attracts the toner on the developer bearing member to a developing position at which an electrostatic latent image on the photosensitive member is developed by a toner on the developer bearing member is represented by a time Tqcm, a time necessary for the photosensitive member to rotate from an exposure position at which an exposure unit exposes the photosensitive member to the developing position is represented by a time Tetd, and a time necessary for a control unit to control an exposing condition based on a charge amount measured by a measuring unit is represented by a time Tp, the attracting unit is disposed so that Tqcm≧Tedt+Tp holds true. | 10-23-2014 |
20140314434 | DETECTION DEVICE AND IMAGE FORMING APPARATUS - At detection device, in the case where the toner on the developing material carrier is caused to adhere to the first electrode, the controller connects the assembly to the first capacitor using the first switch and connects the assembly to the second capacitor using the second switch; and in the case where the second detection unit detects the oscillation frequency of the quartz oscillator, the controller disconnects the assembly from the first capacitor using the first switch and disconnects the assembly from the second capacitor using the second switch. | 10-23-2014 |