Abstract: It is desirable to cover up or mask the stitch joint error. This invention provides systems and methods for indexing the position of a sheet of recording medium conventionally and then measuring the position of the sheet of recording medium accurately by a sensor. Data in the printhead is shifted so that the data is accurately aligned within a predetermined pixel accuracy to the known paper position. This invention covers up the resulting stitch joint error by modifying the pixels at the stitch joint interface to mask the apparent error.

Abstract: An apparatus for correcting beam-to-beam spacing error on an image plane of a photoreceptor includes a controller which generates beam-to-beam spacing error correction signals, a plurality of optical elements, each of which is adjustable and responsive to beam-to-beam spacing error correction signal and a gray level measurement device. The controller performs the beam-to-beam spacing error correction analysis, determining whether or not a correction is necessary, and if so, which optical element to adjust and the magnitude of adjustment. Enhanced toner area coverage sensors are used to detect the gray level of a toned area of raster scan line patterns at various locations across the photoreceptor image plane. By repeatedly evaluating the beam-to-beam spacing error during operation, the apparatus of the invention is able to correct beam-to-beam spacing errors that may develop during operation and does not permit residual errors to persist even after an initial correction has been implemented.

Abstract: A method and apparatus prevents satellite induced banding caused in bidirectional printing in which a print head alternatively moves in a first printing direction and in a second printing direction opposite to the first printing direction. The ink jet printer includes a controller that performs at least one of (i) selectively removing pixels in the first printing direction in order to lighten an image, and (ii) selectively adding pixels in the second printing direction in order to darken the image.

Abstract: In a printing system in which a rotatable print image bearing belt is mounted on at least one axial belt roller, and the belt must be maintained in a desired substantially consistent lateral registration to maintain image quality, the lateral misregistration of the belt is sensed and a low and substantially constant lateral positional corrective force is applied to the belt in response to the sensing of the lateral misregistration in one of the two directions axial of the axial belt roller for at least one complete rotation of the rotatable print image bearing belt, the low and substantially constant transverse corrective force having a force level sufficient to provide the desired substantially consistent lateral registration of the print image bearing belt.

Abstract: A first aspect of the present invention is a process for masking a scanning artifact within image data representing a document. The process includes generating pixel classification tags for the image data; identifying a window within the image data associated with a scanning artifact using the pixel classification tags; analyzing the image data to derive a replacement video value; and replacing image data associated with a scanning artifact with the replacement video value.

Abstract: Electrophotographic transfer paper comprising base paper having provided on at least one side thereof a coating layer mainly comprising a pigment and a binder at a solids content of 2 to 12 g/m2, which has an Oken's smoothness of 60 to 300 seconds on each side thereof, an air permeability of 10 to 90 seconds, and a coefficient of paper-to-paper friction of 0.5 to 0.9 at 28° C. and 85% RH. The transfer paper has excellent running properties on a digital full-color copying machine or printer of indirect dry electrophotographic system irrespective of the environment of use, especially in a high humidity environment, while proving a satisfactory image.

Abstract: The linear image sensor according to the present invention includes a light receiving a member consisting of at least three light receiving pixel lines 11, 12 and 13; signal charge transfer sections 31, 32, 33, 34, 35 and 36 located on both sides of each of the light receiving pixel lines 11, 12 and 13 of the light receiving a member; and branch transfer sections 33c and 34c which branch from the signal charge transfer sections 33 and 34, which are located on both sides of at least one of the at least three light receiving pixel lines 11, 12 and 13, to extend to reach the signal charge transfer sections 32 and 35 of the adjacent light receiving pixel lines 11 and 13.

Abstract: An ink composition comprised of (1) a polymer; (2) an acid compound of the formula CH3(CH2)m(CH2CH═CH)p(CH2)nCOOH wherein n, m, and p represent the number of segments; (3) a conductive component; (4) a lightfastness component; and (5) a colorant.

Abstract: An image capture user interface receives an image of an area of a user interface selected by a user and translates the image into operations performable by a computer. The user interface is comprised of graphic entities and embedded code. The user places an image capture device, such as a camera pen, on or near a graphic entity of the user interface, and presses a button on the image capture device indicating selection of the graphic entity. In response to the button, an image is captured that corresponds to the graphic entity selected by the user. The image includes embedded code, which is analyzed to develop an image capture code corresponding to the captured image area. The image capture code is then mapped to a selection code corresponding to the graphic entity selected by the user. The user may then make other selections.

Abstract: A process including: introducing and continuously melt mixing in an extruder a mixture of a first resin feed and a second resin feed; measuring within the extruder the melt rheology of the resulting melt mixture of the first and second resins; determining the relative ratio of the first resin and a second resin from the melt rheology in the resulting melt mixture; and adjusting the relative feed ratio of the first resin and second resin feeds introduced to the extruder.

Abstract: A method of minimizing line correlated noise in an imaging system is described. In the described embodiment, gate lines are used to access pixels in an array of pixels, and the output of the pixels are read out from output lines. By randomizing the connection or positioning of the lines such that each gate or read out is coupled to pixels in different columns or rows, the line correlation of noise is reduced.

Abstract: A cleaning unit having a brush roll with a myriad of slidingly scrubbing bristles upright relative to a rotation shaft for slidingly scrubbing the surface of a rotation body with the brush roll for removing toner deposited on the rotation body. When the brush roll is out of contact with the rotation body, the tips of the slidingly scrubbing bristles are inclined in the circumferential direction and when the brush roll is placed in contact with the rotation body, the brush roll does not rotate by itself and is rotated with rotation of the rotation body. The linear speed of the brush roll at the contact position is made different from that of the rotation body.

Abstract: A toner comprised of resin and a charge additive comprised of a complex of a hard acid and a hard base.

Abstract: A charger has a cylindrical rotation tube coming in contact with an image receptor on which a toner image is formed, the rotation tube to which a predetermined charge bias is applied, and drive means for driving the rotation tube at a predetermined peripheral speed, the charger for uniformly charging the surface of the image receptor. When the peripheral speed of the image receptor is V1 and the peripheral speed of the rotation tube is V2, the following relation is satisfied: 1.01<(V2/V1)≦1.10.

Abstract: Acoustic filters for use in an ink jet print head are disclosed. The ink jet print head defines a plurality of operating plates held together in a superimposed relationship forming an ink jet print head defining a plurality of ink manifolds, ink inlets, ink drop-forming orifices and a plurality of acoustic filters. The acoustic filters are a plurality of compliant areas connected by an acoustic filter constriction aperture and a plurality of separate compliant areas all connected to ink manifolds for suppressing unwanted frequencies during print modes.

Abstract: The scanned image registration systems and methods according to this invention register sets of scanned subimages of an original document into a composite scanned image of the original document. The subimages are formed by scanning portions of the original document on a scanner having a scan area, or window or footprint, that is smaller than the size of the document. An appropriate set of affine parameters, or more generally, transformation parameters, is obtained for each subimage relative to a fixed coordinate system. The set of affine parameters for each subimage defines the rotational and translational deformation necessary to place that subimage into the fixed coordinate system. The fixed coordinate system is preferably defined by selecting one of the subimages as a base image. The other images are then warped into registration with the selected base subimage based on the determined affine parameters.

Abstract: In dual mode document imaging systems for either scanning a stationary document with a moving document imager on a large fixed platen or feeding documents past an imaging station on an adjacent smaller platen with the same document imager held there stationary, the smaller platen is mounted to allow vertical movement to allow for different thickness of documents being fed relative to a fixed axis of rotation constant velocity document transport. Thin flexible transition members bridge the outer edges of the gap between the lower surface of the vertically movable smaller platen and the lower surface of the fixed platen to allow the document imager to laterally slide freely, on focal distance maintaining slide pads, across a small gap between the bottom surface of one platen and the bottom surface of the other, with the document imager being spring biased upwardly towards the lower surfaces of both platens.

Abstract: A flash fixing color toner for use in an image forming process includes a binder resin and a hue-altering coloring agent, wherein the hue-altering coloring agent alters, at a time of irradiation of flash light, an initial hue of the color toner into a secondary hue, so that the color toner is fixed to a recording medium by the irradiation of flash light, and a color image is substantially formed with the secondary hue of the color toner.

Abstract: A method and system for classifying images between natural pictures and synthetic graphics is provided. In embodiments of the invention, a picture/graphic classification method and system implements edge features for image classification of natural pictures and synthetic graphics.

Abstract: Methods and systems for authenticating documents. Document data to be modified to contain authentication is inputted. A representation is determined from the document data. Assist information that is usable to reliably recover a determined representation is determined. A one-way hash of the representation and assist information is determined. The one-way hash is then cryptographically signed. The assist information and digitally signed one-way hash is then appended to the document.