Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8436883 | Systems and methods for laser spacing compensation in laser printing devices A method includes providing pixel data that comprises lines of pixel data and shared lines of pixel data, where the shared lines of pixel data are configured such that a first laser and a second laser of a plurality of lasers within a laser printing arrangement will... | 05/07/2013 |
| 8432424 | Alignment of color planes in multi-beam multi-pass printers Methods and apparatuses that facilitate the alignment of multiple color planes of a latent image in a multi-beam multi-pass printer. The methods include determining, during a first pass of a transfer medium of a multi-beam printer, a first time interval between when... | 04/30/2013 |
| 8363081 | Image forming apparatus for correcting sub-scanning misalignment of beams on a photoconductor An image forming apparatus forms a latent image on a photoconductor by irradiating light beams from a plurality of light sources onto the photoconductor. A detection unit detects a time difference between timings of start writing on the photoconductor by the light b... | 01/29/2013 |
| 8358325 | Image processing method, and image processing apparatus The present invention provides an image processing method which includes recording an image by irradiating a recording medium with laser beams which are arrayed in parallel at predetermined intervals to heat the recording medium, so that the image is composed of a p... | 01/22/2013 |
| 8319812 | Image forming apparatus and method of controlling the same An image forming apparatus that is operable at a plurality of image forming speeds and can be constructed at low costs without adding circuits or the like. A conversion circuit converts image data into lighting patterns for turning on/off laser light on a basis of e... | 11/27/2012 |
| 8294744 | Optical writing device, image forming apparatus, method of controlling optical writing device, and computer program product An optical writing device includes: a light source including arrays arranged in a main scanning direction, each array including light-emitting elements arranged in the main scanning direction; a correction-value holding unit to hold, correspondingly with a light-emi... | 10/23/2012 |
| 8284227 | Image forming apparatus and image forming method In a printing device provided with a multi-laser beam, an image gradation occurs due to a difference in characteristics between respective beams. The output beam number is changed by referring to a profile (curvature, tilt, polarity and beam scan interval) of each l... | 10/09/2012 |
| 8259145 | Image forming apparatus with scanning position corrected by non-imaging laser beam An image forming apparatus capable of enhancing the accuracy of the scanning position of a laser beam to thereby obtain a more precise image. Optical sensors detect reflected light from a surface of a photosensitive drum. During image formation, the apparatus detect... | 09/04/2012 |
| 8243114 | Image forming apparatus and control method thereof An image forming apparatus includes a phase calculation portion, a pattern recognition portion, and a correction coefficient output portion. The phase calculation portion calculates a shift amount of the scanning lines as phase information and, from the phase inform... | 08/14/2012 |
| 8217976 | Image forming apparatus, manufacturing method thereof, and exposing device A method and apparatus usable in an image forming apparatus, comprising a photoreceptor, and a plurality of exposing devices having a plurality of light emitting elements arranged therein for exposing the photoreceptor, wherein the plurality of exposing devices incl... | 07/10/2012 |
| 8189026 | Method and apparatus for correcting print images in an electrophotographic printer A method of correcting print images in an electrophotographic printer wherein an image formed by a print head (3) on a peripheral surface of a photoconductor drum (1) is transferred and printed on a sheet of paper. The method comprises: furnishing the ... | 05/29/2012 |
| 8179413 | Image forming device that detects a moving time of a latent image carrier An image forming device includes: an exposure head having a plurality of light emitting elements arranged in a first direction, a first imaging optical system adapted to image light emitted from the light emitting elements, and a second imaging optical system dispos... | 05/15/2012 |
| 8159515 | Image forming apparatus An image forming apparatus includes an image forming unit, an exposure unit, a detection unit, a storage unit, and a control unit. The image forming unit includes a photosensitive member on which an electrostatic latent image is formed. The exposure unit exposes the... | 04/17/2012 |
| 8139096 | Multi-color image forming apparatus and method of controlling the same A multi-color image forming apparatus includes signal detecting units which are included in development units and detect horizontal synchronization signals, a correction unit to count pulse widths of the horizontal synchronization signals detected by the signal dete... | 03/20/2012 |
| 8134584 | Image forming apparatus and method of correcting color registration Disclosed are an image forming apparatus capable of, and method of, improving color registration. The image forming apparatus can employ a beam deflector having a double-sided mirror portion that pivots to bi-directionally scan multiple light beams on multiple photo... | 03/13/2012 |
| 8120632 | Allignment of color planes in multi-beam multi-pass printers Methods and apparatuses that facilitate the alignment of multiple color planes of a latent image in a multi-beam multi-pass printer are described herein. The novel methods includes determining, during a first pass of a transfer medium of a multi-beam printer, a firs... | 02/21/2012 |
| 8102410 | Writing apparatuses and methods Patterns are written on workpieces, such as, glass sheets and/or plastic sheets used in, for example, electronic display devices such as LCDs. The workpiece may be larger than about 1500 mm may be used. An optical writing head with a plurality of writing units may b... | 01/24/2012 |
| 8085288 | Exposure system with a plurality of laser sources located at dispersed sites A CTP system is provided, which allows its continuous use even if some of laser diodes located at dispersed sites are in a non-light emitting state due to breakage or the like. In the case where some channels are in the non-light emitting state, channel-by-channel e... | 12/27/2011 |
| 8081202 | Image forming apparatus and apparatus for correcting difference in oscillation speed among oscillating devices An image forming apparatus includes a device-information storage unit configured to store a scanning frequency of an oscillating device; an image storage unit configured to store image data used for image formation; an image processing unit configured to perform an ... | 12/20/2011 |
| 8035674 | Image forming apparatus A color-shift correction image is formed in a density D and it is determined whether the color-shift correction image can be detected successfully. If the color-shift correction image can be detected successfully, then the density is decreased. If the color-shift co... | 10/11/2011 |
| 8018479 | Method and system for correcting the linearity error in electrophotographic devices The invention describes a method and system for correcting linearity error of an electrophotographic device with a reduced number of lenses. The method and system insert additional time-slices in the data being processed by the electrophotographic device. The additi... | 09/13/2011 |
| 8004549 | Line head and an image forming apparatus using the line head A line head, includes: a microlens array in which a plurality of microlenses having a magnification whose absolute value is below 1 are arranged in a main scanning direction of a surface-to-be-scanned, and a plurality of luminous element groups which are arranged in... | 08/23/2011 |
| 7999837 | Exposure head, image forming apparatus, and image forming method Provided is an image forming apparatus including: a latent image carrier, on which a latent image is formed; an exposure head that includes a first light-emitting element and a second light-emitting element that is disposed in a direction in which the latent image c... | 08/16/2011 |
| 7990406 | Optical scanning device having a pitch adjustment device for adjusting a beam pitch and image forming apparatus including same A multi-beam scanning device for focusing deflected light beams onto an object to be scanned includes a light source unit, a deflector, a pitch adjustment device, and a conical-shape compression-torsion coil spring. The light source unit is rotatable about an optica... | 08/02/2011 |
| 7961208 | Image forming apparatus, image forming method, and image forming program product An image is formed by dividing rasterized original image data into regions in accordance with N recording heads, and scanning a recording body by simultaneously irradiating recording beams from the N recording heads. Corrected image data divided into regions in acco... | 06/14/2011 |
| 7956882 | Multiple-beam scanning device and image forming apparatus having the multiple-beam scanning device A multi-beam scanning device includes a light source part having a plurality of light emitting sources which light emitting sources are monolithically arranged in a surface perpendicular to an optical axis; a light deflection part configured to deflect a plurality o... | 06/07/2011 |
| 7920155 | Image forming apparatus and method of controlling the same An image forming apparatus that is operable at a plurality of image forming speeds and can be constructed at low costs without adding circuits or the like. A conversion circuit converts image data into lighting patterns for turning on/off laser light on a basis of e... | 04/05/2011 |
| 7907161 | Adaptive correction system Adaptive correction techniques are disclosed that adaptively correct aberrations which may arise in systems such as laser printers, for example. For laser printers, calibration data processing results may be detected by a detector that is disposed to correspond phys... | 03/15/2011 |
| 7880756 | Image forming apparatus An image forming apparatus includes a photoreceptor member; a LED head that includes a plurality of light emitting diodes arrayed in a line along a rotating axial direction of said photoreceptor member and that is modulated in response to image signals, so as to exp... | 02/01/2011 |
| 7868908 | Image recording apparatus having a laser source An image recording apparatus according to this invention includes a frequency divider 22 for generating a reference signal of a frequency higher than that of a dot clock signal, a pulse exposure control circuit 31 for causing a laser beam emitted from ... | 01/11/2011 |
| 7859557 | Method and apparatus for recording digital data on image-receiving medium The invention relates to a method and apparatus for recording digital data on an image-receiving medium (20). The recording head (71) is transported along a slow-scan-direction (Y) and digital image data is recorded along a fast-scan-direction (X). The... | 12/28/2010 |
| 7843480 | Image-recording device for generating a number of image spots in projection line An image-recording device for generating image spots (210) by n individually controllable light sources (12), which each have a distance si, i being=1 . . . n, to an object line (14), in a projection line (16) of the object lin... | 11/30/2010 |
| 7834898 | Image forming device, image forming method, and exposure head An image forming device includes a photoconductor drum having a rotational shaft in a first direction, and an exposure head having a plurality of imaging optical systems disposed in the first direction and a second direction and each having a negative optical magnif... | 11/16/2010 |
| 7830406 | LED printer and print control method An LED printer has a photosensitive drum, a resist roller for feeding a printing medium to the photosensitive drum at a first constant speed, a fixing device for discharging the printing medium from the photosensitive drum at a second constant speed, a separation ty... | 11/09/2010 |
| 7808519 | Line head and an image forming apparatus using the line head A line head, includes: a microlens array in which a plurality of microlenses having a magnification whose absolute value is below 1 are arranged in a main scanning direction of a surface-to-be-scanned, and a plurality of luminous element groups which are arranged in... | 10/05/2010 |
| 7791628 | Deviation amount detecting device, deviation amount detecting method, and computer-readable recording medium A deviation amount detecting device for use in an electrophotographic color image forming device is configured to correct, during an inter-cycle period in which computation of a first deviation amount using a result of reading of deviation detection patterns is held... | 09/07/2010 |
| 7719556 | Method and apparatus for imaging with multiple exposure heads An imaging system is equipped with two or more exposure heads that are each able to image either a separate media sheet or a portion of a single media sheet loaded on a media carrier. The imaging time for any combination of media sheets is minimized by providing for... | 05/18/2010 |
| 7705867 | Apparatus for forming latent image using line head and control method for such apparatus An apparatus includes: a latent image carrier which is freely rotatable in a predetermined sub scanning direction; a latent image carrier gear which is attached to an end portion of the latent image carrier; a drive motor which applies drive rotation force upon the ... | 04/27/2010 |
| 7667725 | Multi-beam image forming apparatus and image forming method using the same A multi-beam image forming apparatus and a method using the same. The image forming apparatus includes: an image process module to divide first image data into a plurality of second image data; a light scanning unit to scan the plurality of second image data using a... | 02/23/2010 |
| 7643046 | Laser beam scanning device, image forming apparatus, and laser beam detecting method by the laser beam scanning device A laser beam scanning device is disclosed. The laser beam scanning device includes a diffraction optical element which forms a pattern of a diffraction image including two images extending in a direction corresponding to the sub scanning direction and one image exte... | 01/05/2010 |
