Abstract:
A fiber classing device having a sample window for viewing a fiber sample. A light source provides light that is directed toward and reflected by the fiber sample, producing reflected light. A photo sensitive detector is positioned to receive the reflected light, and it detects lightness, redness, and yellowness of the fiber sample. Processing means assign a preliminary grade to the fiber sample based at least in part on the lightness and yellowness of the fiber sample. The processing means also selectively adjust the preliminary grade to a final grade based at least in part on the redness of the fiber sample. The photo sensitive detector has one or more of a spectrometer, a camera, or a set of three photo diodes. A first photo diode detects light with a wavelength of between about 505 nanometers and about 605 nanometers, corresponding to the lightness of the fiber sample. A second photo diode detects light with a wavelength of between about 430 nanometers and about 530 nanometers, corresponding to the yellowness of the fiber sample. The third photo diode detects light with a wavelength of between about 550 nanometers and about 650 nanometers, corresponding to the redness of the fiber sample. The processing means analyzes the information from the photo sensitive detector to determine the mean redness, variance in lightness, variance in redness, variance in yellowness, contrast in lightness, percent of yellow spots, and contrast in yellowness of the fiber sample. The selective adjustment from the preliminary grade to the final grade is based at least in part on these parameters.
Abstract:
A system removes a light sensor artifact from a light sensor in a printer that is used to obtain reflectance measurements from test patterns printed on an image substrate. The system includes a print head for ejecting a plurality of pixels having a first single color in a test pattern onto an image substrate, a light source for illuminating the test pattern on the image substrate with a light, a light sensor for measuring reflectance of the first portion of the test pattern with reference to a light having a color that is non-complementary to the first single color of the test pattern, measuring reflectance of the first portion of the test pattern with reference to a light that is complementary to the first single color of the test pattern, and measuring reflectance of the second portion of the test pattern with reference to the complementary light, the second portion including an area that overlaps the first portion of the test pattern, and a sensor controller configured to scale the reflectance of the first portion measured with reference to the non-complementary light to minimize a difference between the reflectance of the first portion measured with reference to the complementary light and the reflectance of the second portion measured with reference to the complementary light in the overlapped area.
Abstract:
A computer-implemented method for gray balance calibration in an image printing system is provided. The method includes printing, using a print engine, a reference test pattern consisting essentially of black marking medium; sensing, using a sensor, the reference test pattern to obtain a reference image data, the reference image data being a function of the black marking medium; printing, using the print engine, a second test pattern comprising a combination of marking mediums of different colors, other than the color black, available on the image printing system to simulate the black marking medium; sensing, using the sensor, the second test pattern to obtain a second image data, the second image data being a function of the combination of marking mediums; and determining a difference between the reference image data and the second image data to obtain a correction offset for gray balance calibration in the image printing system.
Abstract:
A computer-implemented method for gray balance calibration in an image printing system is provided. The method includes printing, using a print engine, a reference test pattern consisting essentially of black marking medium; sensing, using a sensor, the reference test pattern to obtain a reference image data, the reference image data being a function of the black marking medium; printing, using the print engine, a second test pattern comprising a combination of marking mediums of different colors, other than the color black, available on the image printing system to simulate the black marking medium; sensing, using the sensor, the second test pattern to obtain a second image data, the second image data being a function of the combination of marking mediums; and determining a difference between the reference image data and the second image data to obtain a correction offset for gray balance calibration in the image printing system.
Abstract:
A method evaluates image quality in an ink printing system and generates data values for altering the operation of the ink printing system. The method includes generating an ink image on an ink image receiving member that corresponds to a digital image stored in the ink printing system, generating a scanned image signal corresponding to the ink image, generating firing signal waveform adjustments and image data adjustments with reference to the scanned image signal corresponding to the ink image, and operating a printhead in an ink imaging system with reference to the firing signal waveform adjustments and the image data adjustments.
Abstract:
A system removes a light sensor artifact from a light sensor in a printer that is used to obtain reflectance measurements from test patterns printed on an image substrate. The system includes a print head for ejecting a plurality of pixels having a first single color in a test pattern onto an image substrate, a light source for illuminating the test pattern on the image substrate with a light, a light sensor for measuring reflectance of the first portion of the test pattern with reference to a light having a color that is non-complementary to the first single color of the test pattern, measuring reflectance of the first portion of the test pattern with reference to a light that is complementary to the first single color of the test pattern, and measuring reflectance of the second portion of the test pattern with reference to the complementary light, the second portion including an area that overlaps the first portion of the test pattern, and a sensor controller configured to scale the reflectance of the first portion measured with reference to the non-complementary light to minimize a difference between the reflectance of the first portion measured with reference to the complementary light and the reflectance of the second portion measured with reference to the complementary light in the overlapped area.
Abstract:
A method evaluates image quality in an ink printing system and generates data values for altering the operation of the ink printing system. The method includes generating an ink image on an ink image receiving member that corresponds to a digital image stored in the ink printing system, generating a scanned image signal corresponding to the ink image, generating firing signal waveform adjustments and image data adjustments with reference to the scanned image signal corresponding to the ink image, and operating a printhead in an ink imaging system with reference to the firing signal waveform adjustments and the image data adjustments.
Abstract:
An apparatus that individualizes fibers within a feed stream without breaking the fibers. A first stage, having first pinch rollers, receives the feed stream and provides it to a second stage. The second stage receives the feed stream from the first stage, and provides a thinned stream to a third stage. Second stage apron belts draw the feed stream under tension from the first stage into the second stage. Second pinch rollers draw the feed stream under tension from the second stage apron belts and provide the thinned stream to the third stage. The third stage receives the thinned stream from the second stage and provides individualized fibers. Third stage apron belts draw the thinned stream under tension from the second stage into the third stage. Third pinch rollers draw the thinned stream under tension from the third stage apron belts and provide the individualized fibers.
Abstract:
A moisture curable composition capable of cure to an elastomeric body, comprising a polymeric material having not less than two hydroxyl or hydrolyzable groups an alkoxysilane curative and a catalyst comprising: a mixture and/or reaction product of a compound (i) M[OR]4 and compound (ii) M[OR′]x[Z]z, wherein M represents a metal having a valency of 4 selected from Group IVB of the Periodic Table, preferably titanium or zirconium. Each R and R′ may be a primary, secondary or tertiary aliphatic hydrocarbon or the group SiR93; and a compound iii) of the general formula A-C(═O)R1—C(═O)—B wherein R1 is a methylene group or a substituted methylene radical, A is selected from —(CX2)nC(R2)3 wherein n is from 0 to 5, and an adamantyl group or a derivative thereof; B is selected from the group of —(CX2)tC(R2)3 wherein t is from 0 to 5; a monovalent alkyl group having from 1 to 6 carbon atoms and; OR3, wherein R3 is selected from the group of —(CX2)tC(R2)3 and a monovalent alkyl group having from 1 to 6 carbon atoms; wherein each X is the same or different and is selected from the group of a halogen radical and hydrogen, each R2 is the same or different and is selected from the group of a halogen radical and an alkyl radical having one to eight carbon atoms, and when n is greater than 0 at least one of X or R2 is a halogen radical
Abstract:
A fiber quality monitoring apparatus is constructed with a sample window for viewing a fiber sample. As the fiber sample passes the sample window, a bulb is strobed to produce a light pulse that is directed toward and reflected by the fiber sample. When the light pulse reaches a desired intensity, a first photo diode generates a synchronization signal. A second photo diode detects reflected light with a wavelength between about 500 nanometers and about 600 nanometers and produces a reflection signal. A third photo diode detects reflected light with a wavelength between about 430 nanometers and about 530 nanometers and produces a color signal. A charge coupled device camera is positioned to receive the reflected light pulse. The charge coupled device camera has an array of pixels which receive the reflected light pulse. Pixels receiving the reflected light pulse at an intensity below a desired value are designated as dark pixels and pixels receiving the reflected light pulse at an intensity greater than the desired level are designated as light pixels. A prism focuses the reflected light pulse received by the second and third photo diodes, and a transparent block encloses the strobing Xenon bulb and the first photo diode so that the light pulse is conducted from the Xenon bulb to the first diode. Processing means analyze the color signal and the reflection signal and produce a composite value, and a percentage value representing the percentage of dark pixels in the array of dark and light pixels. Furthermore, the processing means recognizes and classifies patterns of dark pixels in the array of light and dark pixels, and controls fiber processing equipment in response to the composite and percentage values.