摘要:
A method of locating the position of an object on the platen of a raster input scanner having a movable scan carriage and an extended array of scanners is disclosed. The method includes the steps of obtaining a previously stored theoretical position of the object from a memory, locating the scan carriage at a position spaced a predetermined distance from the previously stored position, moving the scan carriage toward the previously stored position while operating at least some of the scanners until a target on the object is detected by the operating scanners, and storing a target position of the scan carriage where the target is detected. The target position can represent the location of the scanner's calibration strip or the registration position of a document. After the target position is stored, the scan carriage can be located at the target position for calibrating the scanners if the target position represents the location of the calibration strip. Alternatively, the scan carriage can be located at the target position prior to actuating the scanners for each subsequent document to be scanned if the target position represents a document registration position. This procedure is repeated to determine the document registration positions for documents which are placed on the platen manually, by an SADH or SALDH input, by a CFF input, or by an RDH input.
摘要:
A multifeed resistance system 90 which is a simple and low cost modification of known non-retard type bottom sheet separator/feeders, especially a vacuum feeder 17 in which the stack 14 of sheets is fluffed by an air knife 18 and the front area of the bottom sheet 98 is pulled down by vacuum and fed vacuum out from the bottom of the stack 14 with the corrugating vacuum belt feeder 17 and there fed out of the tray 16 from underneath the stack 14. A limited area of special multifeed resisting or retarding member 92 under the rear area of the stack 14 has been found to be effective in resisting multifeeds, yet not interfere with effective bottom sheet sequential feeding. One or more areas of the double feeding resistance member 92 overly the rear or upstream portion of the stack supporting bottom surface 15 of the stacking tray 16. This is an oriented (one-way) fiber mat, cloth or pad material, the fibers 94 of which are angled upstream (oriented towards the rear of the tray 16). These upstream oriented fibers 94 engage the trail or upstream edge area of the second-from-the-bottom sheet 96 to resist its downstream movement as the bottom-most sheet 98 is being initially separated and fed out.
摘要:
A method for determining a location on an image bearing surface of an image printing system where a toner image is to be printed is provided. The method comprises generating a first signal from a detector that is configured to detect a reference mark on the image bearing surface, and a second signal from a clock system that counts. incremental movements of the image bearing surface, determining a first value that correlates the first signal and the second signal, where the first value corresponds to a value of the second signal at a start of characterization of the image bearing surface, and determining a second value using the first value, where the second value provides the location on the image bearing surface where the toner image is to be printed.
摘要:
Automated diagnosis of drive trains having electrically operated components based upon the ability of a first servo motor to rotate a second servo motor when both servo motors are selectively coupled to the drive train. Beneficially, the status of the drive train is sent to a remote location using a data link.
摘要:
A document handling system for sequentially feeding document sheets to be imaged with a controlled minimized interdocument gap therebetween even though the sheet separator-feeder sequentially feeds the documents from the stack in the input tray with initial interdocument gap variations to a second transport path portion feeding the document sheets through the imaging station at a constant velocity. A first servo drive feeds the documents in a first path portion including the separator-feeder, and a second servo drive feeds the documents in a second path portion providing the constant velocity. A sheet edge sensor in the first path portion signals the passage of the lead or trail edge of document sheets. A servo controller connecting with the sheet edge sensor and the first servo drive automatically measures the initial interdocument gap variations and change the feeding of document sheets in the first path portion so as to automatically changes the interdocument gap to a preset desired minimum interdocument gap in the second path portion. Preferably the second servo drive has an encoder generating signals proportional to its drive and the servo controller counts these signals between the passage of the trail edge of one document sheet and the passage of the lead edge of the next sequential document sheet past the sheet edge sensor, to calculate control signals for the first servo drive to drive it variably longer at a higher velocity than the second servo drive.
摘要:
In a system for detecting and signaling the approximate size of a set, stack or job of document sheets, especially for a recirculating type automatic document feeder with a document set stacking and feeding tray for a copier or other document imaging system, in which an electromechanical set separator system provides rough initial stack height and therefore set size or document number estimation signals from the position of the set separator arm on the stack, and in which there is also a counter for counting the number of document sheets fed out from the tray; the advance estimation of the number of documents to be fed to be imaged is significantly improved by dynamically comparing the count of the number of document sheets fed out from the tray at and with the transition in the set size estimation signal from the set separator system.
摘要:
A method for determining a location on an image bearing surface of an image printing system where a toner image is to be printed is provided. The method comprises generating a first signal from a detector that is configured to detect a reference mark on the image bearing surface, and a second signal from a clock system that counts incremental movements of the image bearing surface, determining a first value that correlates the first signal and the second signal, where the first value corresponds to a value of the second signal at a start of characterization of the image bearing surface, and determining a second value using the first value, where the second value provides the location on the image bearing surface where the toner image is to be printed.
摘要:
An electronic reprographic apparatus, including a method for increasing the speed of manual or semi-automatic imaging of signature-type original documents, having the ability to selectively control the areas of the documents to be imaged. In particular, the system enables the user to identify the type of input document, including size and image cropping dimensions, thereby eliminating the potential for imaging beyond document edges or in bound document gutter regions. In addition, the system is suitable for scanning both page sides of a first signature-type document on the first pass of the scan array and is capable of scanning a second signature-type document on the reverse or return pass. Furthermore, the system implements the scanning operation with a center registration technique, facilitating the registration of bound documents.
摘要:
An illumination output from a fluorescent lamp used in a RIS type scanner is maintained at optimum by monitoring the lamp's on/off state and turning the lamp on for a time period following a specified cumulative off time. In one example, the lamp is turned on for a two minute interval following a one hour off time. Following the two minute on period, a diagnostic test is automatically performed to determine whether variations in the lamp output have resulted in an out of specification condition requiring that the lamp be recalibrated to the photosensor array. The calibration is automatically enabled by adjusting the gain of the photosensor array until the photosensor response is within the nominal percentage range. The scanner is then returned to a standby mode. All of the tests are performed automatically and normal operations can be accomplished while the lamp is in warm up phase.
摘要:
A method and apparatus for operating an electronic reprographic system upon detection of a fault are described. Original documents of a job to be printed are scanned to provide images for storage. When scanning is interrupted, the last captured image is stored and selectively displayed. If scanning is not completed before the interruption, the system is monitored for the occurrence of a fault before scanning is resumed. The detection of a fault occurrence requires clearance of the paper path before scanning operation can be resumed. If scanning is completed, printer operation is enabled to provide image output. Partially completed scan jobs resulting from scanner interruption are saved in operator accessible memory.