Patent application number | Description | Published |
20120069075 | OPTICAL SENSOR FOR PRINTER MEDIA MOTION DETECTION - An inkjet printer includes a paper tray for holding print media; a pick-up roller for moving the print media along at least a portion of a pre-print zone of a paper transport path; a light source disposed along the pre-print zone of the paper transport path that directs light toward a non-print side of the print media for illuminating the non-print side of the print media; and an array sensor that receives reflected light from the non-print side of the print media; wherein data from the sensor is used to determine an amount of motion of the print media in the pre-print zone. | 03-22-2012 |
20120139985 | PRINTER FOR DETERMINING PAPER TYPE USING TRANSMITTANCE - A printer that determines paper type includes one or more light sources sequentially outputting a short wavelength radiation and a long wavelength radiation onto a paper that transmits the long wavelength radiation and the short wavelength radiation is absorbed by a fluorescent compound in the paper resulting in the emission of long wavelength fluorescent radiation; a first detector that detects a long wavelength fluorescence signal resulting from the short wavelength source and a transmittance signal resulting from the long wavelength source; and a lookup table that determines a paper type from a plurality of paper types based on the fluorescence signal and transmittance signals. | 06-07-2012 |
20120139986 | METHOD FOR DETERMINING PAPER TYPE IN PRINTERS - A method for determining a type of paper and for determining printing parameters based on the type of paper, the method includes the steps of (a) illuminating a paper sequentially with an short wavelength radiation and a long wavelength radiation; detecting a fluorescence signal resulting from the short wavelength radiation and a long wavelength signal resulting from the long wavelength radiation; determining a paper type from a plurality of paper types based on the fluorescence signal and second long wavelength signal; and adjusting the printing parameters based on the determined paper type. | 06-07-2012 |
20120139991 | PRINTER FOR DETERMINING PAPER TYPE USING REFLECTION - A printer that determines paper type includes one or more short and long wavelength radiation sources sequentially outputting a short wavelength radiation and a long wavelength radiation onto a paper that reflects the long wavelength radiation and the short wavelength radiation is absorbed by a fluorescent compound in the paper resulting in the emission of long wavelength fluorescent radiation; a first detector that detects a long wavelength fluorescence signal resulting from the short wavelength source and a reflectance signal resulting from the long wavelength source; and a lookup table that determines a paper type from a plurality of paper types based on the fluorescence signal and reflectance signals. | 06-07-2012 |
20120140007 | INKJET PRINTERS WITH DUAL PAPER SENSORS - A printer that determines paper type includes a first short and long wavelength radiation source located on a first side of paper which first radiation source sequentially outputs a short wavelength radiation and a long wavelength radiation onto the first side of the paper that reflects the long wavelength radiation and the short wavelength radiation is absorbed by the paper and emitted as long wavelength fluorescence radiation; one or more first detectors located on the first side of the paper and each detector detects a long wavelength fluorescence signal resulting from the short wavelength radiation source of the first radiation source and a reflectance signal resulting from the long wavelength radiation source of the first short and long wavelength radiation source; a second short and long wavelength radiation source located on a second side of the paper which second short wavelength and long wavelength radiation source sequentially outputs a short wavelength radiation and a long wavelength radiation onto the second side of the paper that reflects the long wavelength radiation and the short wavelength radiation is absorbed by the paper and emitted as long wavelength fluorescence radiation; one or more second detectors located on the second side of the paper each detector detects a long wavelength fluorescence signal resulting from the short wavelength radiation source of the second radiation source and a reflectance signal resulting from the long wavelength radiation source of the second short and long wavelength radiation source; and a lookup table that determines a paper type from a plurality of paper types based on the fluorescence signal and reflectance signals. | 06-07-2012 |
20120306955 | INKJET PRINTER HAVING AUTOMATED CALIBRATION - An inkjet printer includes a printer carriage positioned on a first side of a platen and that moves across at least a portion of the platen; a light source positioned on a second side of the platen which second side is different from the first side; a sensor positioned on the printer carriage that detects an amount of light illuminated from the light source; an electronic device that receives data indicating the amount of light transmitted through a media patch with known characteristics; wherein the electronic device compares the amount of transmitted light to stored target values to determine a variation of the sensor response for forming a correction factor; wherein the electronic device uses the correction factor to calibrate at least a first signal of the inkjet printer. | 12-06-2012 |
20120306957 | METHOD FOR DETERMINING VARIANCE OF INKJET SENSOR - A method for determining a variance of a sensor in inkjet printers includes maintaining a printer carriage at a stationary position; illuminating a media patch of known characteristics with a light source that varies an intensity of the light between at least a first and second intensity, in which the second intensity is different from the first intensity; obtaining at least specular reflectance data from light reflected off the print media by measuring a signal from a photo-detector during the illumination; and comparing the specular data to stored values to determine a variation of the sensor response for forming a correction factor; and using the correction factor to calibrate at least a first signal of the inkjet printer. | 12-06-2012 |
20120306958 | METHOD FOR ADJUSTING A SENSOR RESPONSE - A method for determining a variance of a sensor in inkjet printers comprising maintaining a printer carriage at a stationary position; illuminating a media patch of known characteristics with a light source that varies an intensity of the light between at least a first and second intensity, in which the second intensity is different from the first intensity; obtaining an amount of light transmitted through the media patch by measuring a signal from a photo-detector during the illumination; and comparing the amount of received light to stored target values to determine a variation of the sensor response for forming a correction factor; and using the correction factor to calibrate at least a first signal of the inkjet printer. | 12-06-2012 |
20130162748 | INTEGRATED IMAGING SYSTEM FOR PRINTING SYSTEMS - An integrated imaging system for a printing system that prints content on a moving print media includes a housing, an opening in the housing for receiving light reflected from the print media, a folded optical assembly in the housing that receives the reflected light and transmits the light a predetermined distance, and an image sensor within the housing that receives the light and captures one or more images of the printed content. | 06-27-2013 |
20130163827 | METHOD FOR DETECTING ARTIFACTS IN PRINTED CONTENT - A method for detecting artifacts in content printed on a moving print media includes capturing one or more images of the content as the print media is moving to obtain pixel data and averaging the pixel data to produce blur in one direction. The one direction can be the direction the print media is moving. Derivative data of the averaged pixel data is determined. A determination is then made as to whether or not one or more peaks are present in the derivative data. If one or more peaks are present, a determination can be made as to whether or not the one or more peaks meet or exceed a threshold value. | 06-27-2013 |
20130257966 | TESTING OF NOZZLES USED IN PRINTING SYSTEMS - A system for testing one or more nozzles in a nozzle plate includes a fixture for holding the nozzle plate, a gas input device for jetting gas through the nozzle, and a first stationary schlieren optical system for producing a light-intensity representation of a gas stream jetted from the nozzle. An image capture device can capture one or more images of the light-intensity representation or the light-intensity representation can be projected onto a screen. | 10-03-2013 |
20130257967 | TESTING OF NOZZLES USED IN PRINTING SYSTEMS - A method for testing a nozzle in a nozzle plate includes jetting gas through the nozzle and forming one or more light-intensity representations of a gas stream jetted from the nozzle using at least one stationary schlieren optical system. One or more images can be captured of the one or more light-intensity representations of the gas stream jetted from the nozzle. Alternatively, respective light-intensity representations of the gas stream jetted from the nozzle can be projected onto a screen. | 10-03-2013 |
20130257968 | TESTING OF NOZZLES USED IN PRINTING SYSTEMS - A method for testing a nozzle in a nozzle plate includes setting an angle of the nozzle plate with respect to an optical axis of a schlieren optical system to a first angle, jetting gas through the nozzle, forming a first light-intensity representation of the gas stream jetting from the nozzle using the schlieren optical system, and capturing a first image of the first light-intensity representation. The angle of the nozzle plate with respect to the optical axis of the schlieren optical system is then adjusted to a different second angle. A second light-intensity representation of the gas stream jetting from the nozzle is formed using the schlieren optical system and a second image of the second light-intensity representation is then captured. The first and second images can be analyzed to determine whether the nozzle is functioning properly. | 10-03-2013 |
20130321512 | DETECTING STRETCH OR SHRINK IN PRINT MEDIA - A print media in a printing system includes multiple test patterns with each test pattern having one or more marks. Each test pattern can have a different number of marks. A method for detecting size variations in the print media while the print media is moving through the printing system includes scanning the test patterns as the print media is moving in a transport direction to produce test pattern signals, with each signal representing a respective test pattern, and analyzing the measured test pattern signals to determine whether a size variation has occurred in the print media. One or more compensation values can be determined based on the size variation. If a size variation is detected, the operation or setting of one or more components in the printing system can be adjusted based on the one or more compensation values. | 12-05-2013 |
20130321513 | DETECTING STRETCH OR SHRINK IN PRINT MEDIA - A printing system includes a print media and one or more non-objectionable test patterns formed or printed on the print media. An integrated imaging system captures images of the one or more non-objectionable test patterns. The integrated imaging system includes a housing, an opening in the housing for receiving light reflected from a moving print media, a folded optical assembly in the housing that receives the reflected light and transmits the light a predetermined distance, and an image sensor within the housing that receives the light and captures one or more images of the one or more non-objectionable test patterns. A processing device can process the one or more images to determine if one or more size variations have occurred in the print media. | 12-05-2013 |
20130321515 | DETECTING STRETCH OR SHRINK IN PRINT MEDIA - A printing system includes a print media having two sets of test patterns formed or printed in at least two margins adjacent a content area on the print media. The two sets of test patterns are separated by a pattern distance and at least two test patterns in each set of test patterns have a different number of marks. Two integrated imaging systems are disposed opposite the print media and are mechanically tied together and separated by a fixed distance. The integrated imaging systems substantially simultaneously capture images of the two sets of test patterns. An image processing device can process the images to determine if one or more size variations have occurred in the print media in the in-track direction. | 12-05-2013 |
20130321516 | DETECTING STRETCH OR SHRINK IN PRINT MEDIA - A printing system includes a print media having two sets of test patterns formed or printed in at least two margins adjacent a content area on the print media. The two sets of test patterns are separated by a pattern distance and at least two test patterns in each set of test patterns have a different number of marks. Two integrated imaging systems are disposed opposite the print media and are mechanically tied together and separated by a fixed distance. The integrated imaging systems substantially simultaneously capture images of the two sets of test patterns. An image processing device can process the images to determine if one or more size variations have occurred in the print media in the in-track direction. | 12-05-2013 |
20140002522 | FLAT FIELD AND DENSITY CORRECTION IN PRINTING SYSTEMS | 01-02-2014 |
20140002523 | IDENTIFYING A LINEHEAD PRODUCING AN ARTIFACT IN CONTENT PRINTED ON A MOVING PRINT MEDIA | 01-02-2014 |
20140002535 | IDENTIFYING A LINEHEAD PRODUCING AN ARTIFACT IN CONTENT PRINTED ON A MOVING PRINT MEDIA | 01-02-2014 |
20140002536 | FLAT FIELD AND DENSITY CORRECTION IN PRINTING SYSTEMS | 01-02-2014 |
20140015889 | EDGE DETECTION IN A PRINTING SYSTEM - A printing system includes an integrated imaging system that captures images of a moving print media and a portion of a support device extending out from at least one edge of the moving print media. A method for edge detection includes capturing one or more images of the moving print media and a portion of the support device extending out from at least one edge of the moving print media to obtain pixel data and averaging the pixel data to produce blur in a media transport direction. Derivative data of the averaged pixel data is then determined and at least one peak is detected in the derivative data. A determination is made as to whether a location of a respective edge of the moving print media is associated with the at least one peak and positioned correctly. | 01-16-2014 |
20140015890 | EDGE DETECTION IN A PRINTING SYSTEM - A printing system includes one or more integrated imaging systems each positioned opposite a moving print media for capturing one or more images of the moving print media and a portion of a support device extending out from at least one edge of the moving print media. Each integrated imaging system includes an opening in a housing for receiving light reflected from the moving print media and the support device, a folded optical assembly in the housing that receives the reflected light and transmits the light a predetermined distance, and an image sensor within the housing that receives the light from the focusing lens and captures the one or more images. The folded optical assembly includes one or more mirrors that direct light to a lens assembly. The lens assembly includes a zoom lens and a focusing lens. | 01-16-2014 |
20140015891 | EDGE DETECTION IN A PRINTING SYSTEM - A method for detecting artifacts in content printed and for edge detection includes adjusting a focal length of a lens assembly to change an angle of view of the integrated imaging system to include a moving print media and a portion of a support device extending out from at least one edge of the moving print media. One or more images of the moving print media and the portion of the support device is captured to obtain pixel data. Alternatively, the angle of view of the integrated imaging system can be adjusted to include the moving print media and one or more images of the moving print media is captured to obtain pixel data. The pixel data is averaged to produce blur in a media transport direction. Derivative data of the averaged pixel data is determined at least one peak is detected in the derivative data. | 01-16-2014 |
20140015892 | EDGE DETECTION IN A PRINTING SYSTEM - A printing system includes an imaging system positioned opposite a print media for capturing images of the moving print media and a portion of a support device extending out from the edges of the print media. The integrated imaging system includes a housing, an opening in the housing for receiving light reflected from the moving print media and the support device, a folded optical assembly in the housing that transmits the light a predetermined distance, and an image sensor within the housing that receives the light and captures the one or more images. An image processing device is connected to the integrated imaging system and adapted to determine derivative data of averaged pixel data and to determine whether a respective edge of the print media is associated with at least one peak detected in the derivative data and positioned correctly. | 01-16-2014 |
20140035990 | INCORRECT STITCHING DETECTION IN A PRINTING SYSTEM - A printing system includes a linehead that includes two adjacent printheads and an integrated imaging system positioned opposite a moving print media for capturing one or more images of content printed on the moving print media in at least a stitch boundary or an overlap region. The integrated imaging system includes an opening in a housing for receiving light reflected from the moving print media; a folded optical assembly in the housing that receives the reflected light and transmits the light a predetermined distance; and an image sensor within the housing that receives the light and captures the one or more images. An image processing device is adapted to determine derivative data of averaged pixel data obtained from the one or more captured images and to detect one or more peaks in the derivative data that represent stitching artifacts. | 02-06-2014 |
20140035991 | INCORRECT STITCHING DETECTION IN A PRINTING SYSTEM - A method for monitoring stitching between two adjacent printheads includes capturing one or more images of content printed on a moving print media in at least a stitch boundary or overlap region to obtain pixel data. The pixel data is then averaged in a media transport direction to produce blur in an image or images. Derivative data of the averaged pixel data is determined and one or more peaks is detected in the derivative data. A type of stitching artifact is determined based on the detected peak in the derivative data. | 02-06-2014 |
20140204147 | PRINTHEAD COLOR DENSITY CORRECTION IN PRINTING SYSTEMS - A printing system includes a linehead that jets ink onto a moving print media to print a test block and an integrated imaging system positioned downstream of the linehead with respect to a media transport direction. The integrated imaging system includes an opening in a housing for receiving light reflected from a moving print media. A folded optical assembly in the housing receives the reflected light and transmits the light a distance. One or more image sensors, having known color filter arrays, within the housing each receive the light and capture one or more images of the printed test block. An image processing device is connected to the integrated imaging system for receiving pixel data from the one or more image sensors and configured to determine a color of the ink and a density of the printed test block using the pixel data. | 07-24-2014 |