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US20070023994A1 - Media registration systems and methods - Google Patents

Media registration systems and methods Download PDF

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Publication number
US20070023994A1
US20070023994A1 US11/194,823 US19482305A US2007023994A1 US 20070023994 A1 US20070023994 A1 US 20070023994A1 US 19482305 A US19482305 A US 19482305A US 2007023994 A1 US2007023994 A1 US 2007023994A1
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US
United States
Prior art keywords
media
velocity
drive
current
voltage levels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/194,823
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English (en)
Inventor
Barry Mandel
Martin Krucinski
Joannes deJong
Lloyd Williams
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
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Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Priority to US11/194,823 priority Critical patent/US20070023994A1/en
Assigned to XEROX CORPORATION reassignment XEROX CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DEJONG, JOANNES N. M., WILLIAMS, LLOYD A., KRUCINSKI, MARTIN, MANDEL, BARRY P.
Priority to CA002553357A priority patent/CA2553357C/en
Priority to JP2006204245A priority patent/JP2007039247A/ja
Priority to CN2006101100411A priority patent/CN1908824B/zh
Priority to BRPI0603029-7A priority patent/BRPI0603029A/pt
Publication of US20070023994A1 publication Critical patent/US20070023994A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/002—Registering, e.g. orientating, articles; Devices therefor changing orientation of sheet by only controlling movement of the forwarding means, i.e. without the use of stop or register wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/70—Electrical or magnetic properties, e.g. electric power or current

Definitions

  • Embodiments herein generally relate to media registration/alignment systems and methods within printers and copiers.
  • Current electronic registration systems use a pair of narrow drive nips to control the media alignment during registration, e.g., see U.S. Pat. No. 5,094,442 by Kamprath et al., issued Mar. 10, 1992, U.S. Pat. No. 5,697,609, by Williams et al., issued Dec. 16, 1997, U.S. Pat. No. 5,697,608, by Castelli et al., issued Dec. 16, 1997, U.S. Pat. No. 5,887,996, by Castelli et al., issued Mar. 30, 1999, U.S. Pat. No.
  • New feedback control systems are being developed that enable the control system to compensate for this nip strain by measuring actual paper movement.
  • An example of such a system is entitled “Print Media Registration Using Active Tracking of Idler Rotation, Attorney Docket No. 20031544-US-NP, having U.S. patent Application Ser. No. 10/______, the complete disclosure of which is incorporated herein by reference.
  • These systems work well, but add to the cost of the system, which can be an issue in office class machines or in systems where multiple registration devices are required. It is highly desirable to improve registration system performance without increasing cost.
  • Methods herein supply a program of intended drive motor current/voltage levels (current and/or voltage levels) to the drive motor to establish an intended velocity of the drive motor and corresponding intended velocity of the media moved by the drive roller(s). For example, methods herein align media within the drive nip assembly of a printing apparatus by adjusting the intended current/voltage levels of the drive motor(s). The intended current/voltage levels are used to adjust the intended velocity of the drive motor(s) and associated drive roller(s) so as to position or angle the media within the media path of the printing/copying apparatus.
  • the ratio of the velocity of the rollers to the media may not be as expected from the intended current/voltage level. In other words, there may be some difference between the velocity of the roller and the velocity of the media. This velocity difference or “velocity ratio” is caused by the normal interaction of the surfaces of the roller and media. The velocity ratio is different than “slippage” which occurs when the maximum allowable coefficient of friction between the roller and media is exceeded. After slippage occurs, it may be difficult or impossible to establish a relationship between the velocity of the roller and media; however, before slippage occurs (before the maximum allowable coefficient of friction is exceeded) the embodiments herein establish a relationship between drive motor torque (drive motor current/voltage levels) and the velocity ratio.
  • the drive motor produces more torque, which may increase the interaction forces between the roller and media, and may in turn cause the velocity ratio to decrease from an initial value of 1:1 (unity), when no significant drag or inertial forces are present, to a ratio that is less than or greater than one (e.g., 1:0.95, 1:0.90, 1:0.98, 1:1.02 etc.) when drag or inertial forces cause the drive force between the rollers and media to increase.
  • a ratio that is less than or greater than one e.g., 1:0.95, 1:0.90, 1:0.98, 1:1.02 etc.
  • drag or inertial forces cause the drive force between the rollers and media to increase.
  • change in velocity ratio is generally consistent among different paper types that may be handled by a given drive nip assembly (or class or type of drive nip assembly).
  • embodiments herein can determine the drive force between the drive rollers and media, which can then be used to determine the velocity ratio at any point in time and correct the velocity of the roller and the corresponding velocity of the media accordingly, which avoids having to provide additional hardware media sensors, etc. to detect the actual discrepancy between roller velocity and media velocity.
  • method embodiments establish a predetermined relationship between current/voltage levels and media/drive roller velocity ratios of the specific drive nip assembly (or type of drive nip assembly).
  • the “current/voltage levels” comprise current and/or voltage levels applied to the drive motor and provide an indication of torque being output by the drive motor.
  • the “media/drive roller velocity ratios” comprise velocity relationships between the drive roller and the media when the media is in contact with the drive roller. Because the predetermined relationship is based on results of testing one (or one type or class of) drive nip assembly, the predetermined relationship is considered to be “associated” with a given drive nip assembly.
  • the embodiments herein measure current/voltage levels of the drive motor when the media is in contact with the drive roller so as to determine the drive force being output by the drive motor. Then, embodiments herein can reference the predetermined relationship between current/voltage levels and media/drive roller velocity ratios to determine a difference between the velocity of the drive roller and the velocity the media based on the drive force. Once this velocity difference is determined, embodiments herein can change the current/voltage levels begin applied to the drive motor if the actual velocity of the media is different than the intended velocity of the media so as to correct the velocity of the media. Thus, when referencing the predetermined relationship, embodiments herein produce a velocity ratio correction factor. This velocity ratio correction factor calculation can be done during any velocity profiles of the drive motor. In addition, the inherent drag and inertial forces from the motor and drive system can be calibrated out by measuring the current/voltage levels required to drive the system through a specified velocity profile when no media is present in the drive nip assembly.
  • Apparatus embodiments herein can include a drive nip assembly that is adapted to move media within a printing and/or copying apparatus.
  • a drive motor is included within the drive nip assembly, and a drive roller is connected to the drive motor.
  • a control system is connected to the drive motor. The control system allows the intended current/voltage levels to be changed if the actual velocity of the drive motor is different than the intended velocity of the drive motor.
  • control system establishes a predetermined relationship between current/voltage levels and media/drive roller velocity ratios, as discussed above.
  • the current/voltage levels of the drive motor can be measured when the media is in contact with the drive roller to determine a drive force on the media.
  • the predetermined relationship between current/voltage levels and media/drive roller velocity ratios is referenced to determine the difference between the velocity of the drive roller and the velocity of the media. This allows the control system to change the current/voltage levels begin applied to the drive motor if an actual velocity of the media is different than an intended velocity of the media, so as to provide correction to the drive nip assembly.
  • the control system produces the velocity ratio correction factor when referencing the predetermined relationship and can calculate the velocity ratio correction factor for all velocity profiles of the drive motor. Also, the control system is used to calibrate the current/voltage levels required to drive the system when no media is present in the drive nip assembly. The control system can repeat this calibration periodically to compensate for changes in friction over the life of the system.
  • the embodiments herein establish a relationship between drive motor torque (drive motor current/voltage levels) and the velocity ratio.
  • the current/voltage levels of the drive motor can be measured when the media is in contact with the drive roller to determine a drive force on the media.
  • the predetermined relationship between current/voltage levels and media/drive roller velocity ratios is referenced to determine the difference between the velocity of the drive roller and the velocity of the media. This allows the control system to change the current/voltage levels being applied to the drive motor if an actual velocity of the media is different than an intended velocity of the media, so as to provide correction to the drive nip assembly.
  • embodiments herein can determine the drive force that the rollers are imparting on the media, and then calculate the current velocity ratio and correct the velocity of the roller and the corresponding velocity of the media accordingly, which avoids having to provide additional hardware media sensors, etc. to detect the actual discrepancy between roller velocity and media velocity.
  • FIG. 1 is a graph showing force verses Velocity Ratio curves according to embodiments herein;
  • FIG. 2 is a schematic representation of drive nip assembly
  • FIG. 3 is a flow diagram illustrating aspects of embodiments herein.
  • Embodiments herein use an “electronic” registration control scheme that compensates for nip-strain induced errors (that occur before the maximum allowable coefficient of friction is exceeded) without requiring additional hardware.
  • the act of accelerating, translating and deskewing media through baffles generates inertial and frictional drag forces that result in nip strain, which in turn causes velocity ratios with a value other than unity between the media and drive nip.
  • the embodiments herein provide a control system that accurately predicts the velocity ratio of each nip during any given motion profile by detecting the current or voltage delivered to the servo motors (after the nip strain curve for the drive nips of the system has been previously characterized).
  • Embodiments herein use the required current or voltage applied to the servo or step motor(s) to deduce the drive force at the nip(s), and then calculate a real-time correction to the roll velocity to compensate for nip-strain.
  • the control system then adjusts the target velocity of the drive nips so that the media accurately follows the originally intended velocity profile.
  • the velocity and media position errors from the calculated nip strain could be tracked and a correction made near the end of the registration profile.
  • the ratio of the velocity of the rollers to the media may not be as expected from the intended current/voltage level. In other words, there may be some difference between the velocity of the roller and the velocity of the media. This velocity difference or “velocity ratio” is caused by the normal interaction of the surfaces of the roller and media. The velocity ratio is different than “slippage” which occurs when the maximum allowable coefficient of friction between the roller and media is exceeded. After slippage occurs, it may be difficult or impossible to establish a relationship between the velocity of the roller and media; however, before slippage occurs (before the maximum allowable coefficient of friction is exceeded) the embodiments herein establish a relationship between drive motor torque (drive motor current/voltage levels) and the velocity ratio.
  • FIG. 1 illustrates that different types and thicknesses of media yield the same or very similar velocity ratio profiles when subjected to the same drag in the same drive nip assembly or same type of drive nip assembly. Therefore, FIG. 1 illustrates that the change in velocity ratio can be known if the load is known. For each type of drive nip assembly the velocity ratio curves will match very closely. This type of testing can be done during the drive nip assembly design phase or during manufacturing. If desired, the curves can be averaged or processed through other statistical routines to accommodate specific designer requirements/tolerances, or to be more generally applied to broader classes or types of drive nip assemblies.
  • Embodiments herein observe the load on the motor (which is directly correlated to the drive force that the roller imparts on the media) to produce a correction to the velocity ratio, which can be applied in real time to the drive motor and provide accurate positioning of the media within the printing apparatus.
  • the drive motor produces more torque, which may increase the interaction forces between the roller and media, and may in turn cause the velocity ratio to change from an ideal 1:1 (unity) to a ratio that is less than or greater than one (e.g., 1:0.95, 1:0.90, 1:0.98, 1:1.02etc.). Further, such change in velocity ratio is generally consistent among different paper types that may be handled by a given drive nip assembly (or class or type of drive nip assembly) and among different velocity profiles that may be applied to a given drive nip assembly (or type of drive nip assembly).
  • embodiments herein can determine the velocity ratio and correct the velocity of the roller and the corresponding velocity of all types of media accordingly, which avoids having to provide additional hardware media sensors, etc. to detect the actual discrepancy between roller velocity and media velocity.
  • the velocity of media in a drive nip is dependent on the drag on the media.
  • the ratio of the velocity of the media to the theoretical velocity of the roller is less than one when the drag forces act on the media, and can be less than or greater then one due to the combination of drag forces and inertial forces. This can cause problems in registration systems, since such systems rely on a predictable media velocity to achieve process direction registration, and in many cases, deskew.
  • nip strain The errors caused by nip strain are largely dependent on the tangential forces at each nip throughout the registration move. These forces can vary for each sheet being registered, depending on a variety of factors: initial registration errors, acceleration profiles during the registration move, baffle and/or other paper path component sheet drags. Due to this, the forces cannot be “calibrated out” via “learning” or a set-up procedure. In many registration systems media is still in an upstream bend during the deskew process. Heavy paper and long heavy paper therefore require higher drive forces, which results in higher nip strain errors. Large, heavy media that comes in skewed or offset in one direction will see different nip strain induced errors than media skewed or offset in the opposite direction. The embodiments herein compensate for these errors automatically and do not require any knowledge of the media size or weight being registered.
  • FIG. 2 shows a two nip registration device in which the two nips rollers 204 are driven by separately controlled DC servo motors 200 .
  • the skew sensors 212 are used to detect the skew of the media 206 so that it can be corrected by uneven usage of the motors/rollers 200 / 204 before the media 206 reaches the image transfer point 210 .
  • Input sensors 212 are used to detect the leading edge of the media 206 as well as its speed, position, and skew.
  • the drive torques applied to the motors 200 in a two-nip registration system are directly proportional to the drive forces that the nips 204 exert on the media 206 .
  • the control system 220 can accurately know the velocity ratio of each nip 206 during any given motion profile by detecting the current or voltage delivered to the servo motors 200 after the nip strain curve for the drive nips of the system has been previously characterized.
  • the embodiments herein provide a method of sensing the current or voltage individually applied to the servo motors, using that value to calculate a real-time correction to each different roller velocity to compensate for nip-strain, and then adjusting the velocity of the drive nips so that the media accurately follows the originally intended profile.
  • the system comprises the drive nip assembly shown in FIG. 2 that has one or more drive rollers 204 and a control system 220 that controls the voltage or current to the one or more drive motors 200 so that the motors follow a prescribed velocity profile.
  • the control system 220 also uses the voltage or current applied to the drive motors 200 to deduce the drive force exerted by the drive rollers 204 on the media 206 , and to provide a correction factor to the prescribed velocity profile based on the voltage or current value.
  • At least one motor 200 , and one drive shaft (gears, etc.) with at least one drive nip are used in embodiments herein, although as would be understood by those ordinarily skilled in the art, two or more motors 200 , drive shafts, etc. could be used.
  • the motor(s) 200 can be DC servo motors, step motors, etc.
  • the drive rollers 204 can be made from an elastomeric or other similar material. The position and skew of the lead edge of the media 206 entering the drive system can be detected using input sensors 212 .
  • the control system 220 establishes a predetermined relationship between current/voltage levels and media/drive roller velocity ratios of the specific drive nip assembly (or type of drive nip assembly).
  • the “current/voltage levels” comprise current and/or voltage levels applied to the drive motor 200 and provide an indication of torque being output by the drive motor 200 .
  • the “media/drive roller velocity ratios” comprise velocity relationships between the drive roller and the media when the media is in contact with the drive roller. Because the predetermined relationship is based on results of empirical testing of one (or one type or class of) drive nip assembly, the predetermined relationship is considered to be “associated with” or “unique to” the type of drive nip assembly.
  • the current/ voltage supplied by the controller to the motor should have sufficient sensitivity considering the opposing drag/inertial forces. Thus, controller gain/bandwidth must be sufficiently large to detect these current/voltage levels.
  • the embodiments herein measure current/voltage levels of the drive motor 200 when the media 206 is in contact with the drive roller 204 so as to determine the drive force being output by the drive motor 200 . Then, the control system can reference the predetermined relationship between current/voltage levels and media/drive roller velocity ratios to determine the difference between the velocity of the drive roller and the velocity the media (based on the drive force). Once this velocity difference is determined, the control system 220 can change the current/voltage levels begin applied to the drive motor 200 if the actual velocity of the media is different than the intended velocity of the media (so as to correct the velocity of the media).
  • embodiments herein produce a velocity ratio correction factor.
  • This velocity ratio correction factor can be applied to all velocity profiles of the drive motor 200 .
  • a velocity profile may, for example, result in higher forces at the beginning of the movement (when inertia is higher) and less forces when the media is partially through the drive nip assembly (when maintaining a constant velocity of the media).
  • embodiments herein will automatically apply a larger voltage or current to the motor when high drag forces or inertial forces are present. As shown above, this signal is then used to calculate a correction factor to the desired velocity profile to compensate for nip strain errors.
  • the current/voltage levels of the drive motor 200 can be calibrated when none of the media is present in the drive nip assembly. Calibration is run on the drive system when no paper is present, so that the drive torque inherent to the system can be subtracted out.
  • the correction factor is based on the pre-defined measurement of the variation of media velocity over a range of drag forces for the drive rollers used in the system.
  • the system drive force is calibrated by driving the motors when no paper is present, and using the current or voltage readings measured during this operation to help deduce the additional drive force exerted on the media during media transport.
  • the nip velocity error due to nip strain is corrected on a continuous or frequent basis, and the accumulated nip strain error can be corrected just before the media reaches the image transfer station.
  • the errors due to the deduced nip strain can be tracked (but not corrected on a continuous basis) and a correction made near the end of the registration roll velocity profile.
  • FIG. 3 One exemplary control scheme is shown in flowchart form in FIG. 3 . More specifically, in item 300 , the arrival of a new sheet of media is sensed. The input sensor detects the media's presence and any skew of the media, again using input sensors 212 . Item 302 represents the calculation of the velocity profile which determines the desired velocity (or position) profile form registration of the drive rolls. This information is eventually supplied to the controller in item 306 with supplies a control signal (motor encoded coded signal) to the current/voltage amplifier (item 312 ). The current/voltage is applied to the “plant” (motor, drives, media drive, rollers, and eventually media) in item 314 . A feedback loop is provided to item 304 from the output of the motors to correct for any error that may have occurred to the intended signal being output by item 302 .
  • a control signal motor encoded coded signal
  • Embodiments herein provide an additional feedback loop in items 308 and 310 . More specifically, in item 310 a control signal being output by the controller in item 306 is measured in terms of current and/or voltage. This current/voltage is then referenced on a force calibration look-up table or equation which converts in the current/voltage into nip the drive forces as shown in item 322 . Then, once the nip drive forces are known, the nip velocity correction factor (that is based on the nip strain and calibration curve shown, for example, in FIG. 1 , above) is referenced in item 308 .
  • item 308 outputs a correction factor that is based on a media/drive roller velocity ratio corresponding to the nip drive forces determined in item 310 .
  • This correction factor is supplied to item 302 so that the velocity profile being output by item 302 can be continually adjusted to account for the dynamically changing media/drive roller velocity ratio that varies during the interaction between the media and the nip rollers.
  • the embodiments herein empirically establish a predetermined relationship between current/voltage levels and media/drive roller velocity ratios of the specific drive nip assembly (or type of drive nip assembly) in item 320 (see discussion with respect to FIG. 1 , above).
  • the actual force associated with a given current or voltage application can be obtained empirically to create the force calibration look-up table shown as item 322 .
  • embodiments herein measure current/voltage levels of the drive motor when the media is in contact with the drive roller so as to determine the drive force being output by the drive motor (item 310 ).
  • embodiments herein can reference the predetermined relationship between current/voltage levels and media/drive roller velocity ratios to determine a difference between the velocity of the drive roller and the velocity the media based on the drive force (item 308 ). Once this velocity difference is determined, embodiments herein can change the current/voltage levels begin applied to the drive motor if the actual velocity of the media is different than the intended velocity of the media so as to correct the velocity of the media in item 302 .
  • embodiments herein produce a velocity ratio correction factor that is supplied from item 308 to item 302 . Since the velocity ratio correction factor is the same or very similar for all media types (or can be averaged, as discussed above) and is based on the force applied, the velocity correction factor selected from the look-up table or equation in item 320 can be universally applied to all velocity profiles of the drive motor and all media types. In addition, the current/voltage levels of the drive motor can be calibrated when none of the media is present in the drive nip assembly in item 320 .
  • the desired velocity profile defined in box 302 of FIG. 3 could function in several ways. It could take the input from function 308 and correct the velocity of the drive nips on a continuous basis.
  • the embodiments herein provide a control system that accurately predicts the velocity ratio of each nip during any given motion profile by detecting the current or voltage delivered to the servo motors (after the nip strain curve for the drive nips of the system has been previously characterized).
  • Embodiments herein use the required current or voltage applied to the servo motor(s) to deduce the drive force at the nip(s), and then calculate a real-time correction to the roll velocity to compensate for nip-strain.
  • the control system then adjusts the target velocity of the drive nips so that the media accurately follows the originally intended velocity profile.

Landscapes

  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Control Of Electric Motors In General (AREA)
  • Handling Of Sheets (AREA)
US11/194,823 2005-08-01 2005-08-01 Media registration systems and methods Abandoned US20070023994A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US11/194,823 US20070023994A1 (en) 2005-08-01 2005-08-01 Media registration systems and methods
CA002553357A CA2553357C (en) 2005-08-01 2006-07-25 Media registration systems and methods
JP2006204245A JP2007039247A (ja) 2005-08-01 2006-07-27 メディアレジストレーションシステムおよび方法
CN2006101100411A CN1908824B (zh) 2005-08-01 2006-07-31 介质配准系统及方法
BRPI0603029-7A BRPI0603029A (pt) 2005-08-01 2006-07-31 sistemas e métodos de registro de mìdia

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Application Number Priority Date Filing Date Title
US11/194,823 US20070023994A1 (en) 2005-08-01 2005-08-01 Media registration systems and methods

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US20070023994A1 true US20070023994A1 (en) 2007-02-01

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JP (1) JP2007039247A (pt)
CN (1) CN1908824B (pt)
BR (1) BRPI0603029A (pt)
CA (1) CA2553357C (pt)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070048054A1 (en) * 2005-08-30 2007-03-01 Xerox Corporation Systems and methods for medium registration
US20070052161A1 (en) * 2005-09-08 2007-03-08 Kabushiki Kaisha Toshiba Paper sheet positioning apparatus
US20080008513A1 (en) * 2006-07-06 2008-01-10 Canon Kabushiki Kaisha Printing apparatus, conveyance apparatus, and feed-conveyance control method
US20080136092A1 (en) * 2006-12-06 2008-06-12 Jack Gaynor Elliot Gain-scheduled feedback document handling control system
US20080136094A1 (en) * 2006-12-06 2008-06-12 Jack Gaynor Elliot Gain-scheduled feedback document handling control system
US20080258382A1 (en) * 2007-04-19 2008-10-23 Xerox Corporation Calibration of sheet velocity measurement from encoded idler rolls
US20080306626A1 (en) * 2007-06-06 2008-12-11 Xerox Corporation Feedback-based document handling control system
US20090115124A1 (en) * 2007-11-05 2009-05-07 Xerox Corporation Method and system for correcting lateral position error
US20090134570A1 (en) * 2007-11-28 2009-05-28 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus
US20090302145A1 (en) * 2008-06-10 2009-12-10 Xerox Corporation Printing web system
US20110040906A1 (en) * 2009-08-13 2011-02-17 Jaewoong Chung Multi-level Buffering of Transactional Data
US20110156345A1 (en) * 2009-12-28 2011-06-30 Xerox Corporation Closed loop lateral and skew control
US20120065931A1 (en) * 2010-09-09 2012-03-15 Xerox Corporation Sheet thickness measurement apparatus
US20120181743A1 (en) * 2011-01-18 2012-07-19 Fujitsu Limited Sheet transport device, sheet transport control method, and printer
US20160289026A1 (en) * 2015-03-31 2016-10-06 Brother Kogyo Kabushiki Kaisha Control System
US20180265316A1 (en) * 2015-12-08 2018-09-20 Hewlett-Packard Development Company, L.P. Media alignment calibration
CN110261806A (zh) * 2019-06-14 2019-09-20 杭州优迈科技有限公司 驱动器、变频器以及驱动器的校准方法、控制方法
US11260681B2 (en) 2017-02-07 2022-03-01 Hewlett-Packard Development Company, L.P. Print medium position detection

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JP2013010289A (ja) * 2011-06-30 2013-01-17 Seiko Epson Corp テープ印刷装置の制御方法およびテープ印刷装置
JP6880919B2 (ja) * 2017-03-29 2021-06-02 セイコーエプソン株式会社 記録装置

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4971304A (en) * 1986-12-10 1990-11-20 Xerox Corporation Apparatus and method for combined deskewing and side registering
US5094442A (en) * 1990-07-30 1992-03-10 Xerox Corporation Translating electronic registration system
US5169140A (en) * 1991-11-25 1992-12-08 Xerox Corporation Method and apparatus for deskewing and side registering a sheet
US5219159A (en) * 1992-06-01 1993-06-15 Xerox Corporation Translating nip registration device
US5240241A (en) * 1990-10-31 1993-08-31 Canon Kabushiki Kaisha Sheet feeding apparatus
US5278624A (en) * 1992-07-07 1994-01-11 Xerox Corporation Differential drive for sheet registration drive rolls with skew detection
US5331576A (en) * 1992-02-25 1994-07-19 Pitney Bowes Inc. Mailing machine including skewed sheet detection means
US5337248A (en) * 1992-02-25 1994-08-09 Pitney Bowes Inc. Mailing machine including sheet feeding speed calibrating means
US5484141A (en) * 1992-10-29 1996-01-16 Nisca Corporation Automatic document feeder with position compensating device
US5609428A (en) * 1994-07-26 1997-03-11 Mitsubishi Denki Kabushiki Kaisha Sheet carrying apparatus
US5678159A (en) * 1996-06-26 1997-10-14 Xerox Corporation Sheet registration and deskewing device
US5697609A (en) * 1996-06-26 1997-12-16 Xerox Corporation Lateral sheet pre-registration device
US5697608A (en) * 1996-06-26 1997-12-16 Xerox Corporation Agile lateral and shew sheet registration apparatus and method
US5794176A (en) * 1996-09-24 1998-08-11 Xerox Corporation Adaptive electronic registration system
US6137989A (en) * 1998-04-15 2000-10-24 Xerox Corporation Sensor array and method to correct top edge misregistration
US6168153B1 (en) * 1999-05-17 2001-01-02 Xerox Corporation Printer sheet deskewing system with automatically variable numbers of upstream feeding NIP engagements for different sheet sizes
US6533268B2 (en) * 2001-07-27 2003-03-18 Xerox Corporation Printer sheet lateral registration and deskewing system
US6887996B2 (en) * 2000-12-01 2005-05-03 Guilford Pharmaceuticals Inc. Compounds and their use
US7088948B2 (en) * 2003-07-09 2006-08-08 Eastman Kodak Company Adjustment of skew registration of media to a developed image in a printing machine
US7183730B2 (en) * 2003-05-15 2007-02-27 Hewlett-Packard Development Company, L.P. Method and apparatus for receiving and manipulating sheet material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5312033A (en) * 1991-10-11 1994-05-17 Eastman Kodak Company Web conveyor drive system
JP4047562B2 (ja) * 2001-08-31 2008-02-13 リコープリンティングシステムズ株式会社 シート斜行矯正装置及び画像形成装置

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4971304A (en) * 1986-12-10 1990-11-20 Xerox Corporation Apparatus and method for combined deskewing and side registering
US5094442A (en) * 1990-07-30 1992-03-10 Xerox Corporation Translating electronic registration system
US5240241A (en) * 1990-10-31 1993-08-31 Canon Kabushiki Kaisha Sheet feeding apparatus
US5169140A (en) * 1991-11-25 1992-12-08 Xerox Corporation Method and apparatus for deskewing and side registering a sheet
US5331576A (en) * 1992-02-25 1994-07-19 Pitney Bowes Inc. Mailing machine including skewed sheet detection means
US5337248A (en) * 1992-02-25 1994-08-09 Pitney Bowes Inc. Mailing machine including sheet feeding speed calibrating means
US5219159A (en) * 1992-06-01 1993-06-15 Xerox Corporation Translating nip registration device
US5278624A (en) * 1992-07-07 1994-01-11 Xerox Corporation Differential drive for sheet registration drive rolls with skew detection
US5484141A (en) * 1992-10-29 1996-01-16 Nisca Corporation Automatic document feeder with position compensating device
US5609428A (en) * 1994-07-26 1997-03-11 Mitsubishi Denki Kabushiki Kaisha Sheet carrying apparatus
US5678159A (en) * 1996-06-26 1997-10-14 Xerox Corporation Sheet registration and deskewing device
US5697609A (en) * 1996-06-26 1997-12-16 Xerox Corporation Lateral sheet pre-registration device
US5697608A (en) * 1996-06-26 1997-12-16 Xerox Corporation Agile lateral and shew sheet registration apparatus and method
US5794176A (en) * 1996-09-24 1998-08-11 Xerox Corporation Adaptive electronic registration system
US6137989A (en) * 1998-04-15 2000-10-24 Xerox Corporation Sensor array and method to correct top edge misregistration
US6168153B1 (en) * 1999-05-17 2001-01-02 Xerox Corporation Printer sheet deskewing system with automatically variable numbers of upstream feeding NIP engagements for different sheet sizes
US6887996B2 (en) * 2000-12-01 2005-05-03 Guilford Pharmaceuticals Inc. Compounds and their use
US6533268B2 (en) * 2001-07-27 2003-03-18 Xerox Corporation Printer sheet lateral registration and deskewing system
US7183730B2 (en) * 2003-05-15 2007-02-27 Hewlett-Packard Development Company, L.P. Method and apparatus for receiving and manipulating sheet material
US7088948B2 (en) * 2003-07-09 2006-08-08 Eastman Kodak Company Adjustment of skew registration of media to a developed image in a printing machine

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070048054A1 (en) * 2005-08-30 2007-03-01 Xerox Corporation Systems and methods for medium registration
US7593684B2 (en) * 2005-08-30 2009-09-22 Xerox Corporation Systems and methods for medium registration
US20070052161A1 (en) * 2005-09-08 2007-03-08 Kabushiki Kaisha Toshiba Paper sheet positioning apparatus
US20080008513A1 (en) * 2006-07-06 2008-01-10 Canon Kabushiki Kaisha Printing apparatus, conveyance apparatus, and feed-conveyance control method
US8366333B2 (en) 2006-07-06 2013-02-05 Canon Kabushiki Kaisha Printing apparatus, conveyance apparatus, and feed-conveyance control method
US20100266321A1 (en) * 2006-07-06 2010-10-21 Canon Kabushiki Kaisha Printing apparatus, conveyance apparatus, and feed-conveyance control method
US7762733B2 (en) * 2006-07-06 2010-07-27 Canon Kabushiki Kaisha Printing apparatus, conveyance apparatus, and feed-conveyance control method
US7712737B2 (en) * 2006-12-06 2010-05-11 Xerox Corporation Gain-scheduled feedback document handling control system
US20080136092A1 (en) * 2006-12-06 2008-06-12 Jack Gaynor Elliot Gain-scheduled feedback document handling control system
US20080136094A1 (en) * 2006-12-06 2008-06-12 Jack Gaynor Elliot Gain-scheduled feedback document handling control system
US7712738B2 (en) * 2006-12-06 2010-05-11 Xerox Corporation Gain-scheduled feedback document handling control system
US7530256B2 (en) 2007-04-19 2009-05-12 Xerox Corporation Calibration of sheet velocity measurement from encoded idler rolls
US20080258382A1 (en) * 2007-04-19 2008-10-23 Xerox Corporation Calibration of sheet velocity measurement from encoded idler rolls
US8360422B2 (en) * 2007-06-06 2013-01-29 Xerox Corporation Feedback-based document handling control system
US20080306626A1 (en) * 2007-06-06 2008-12-11 Xerox Corporation Feedback-based document handling control system
US7914000B2 (en) * 2007-06-06 2011-03-29 Xerox Corporation Feedback-based document handling control system
US20110169216A1 (en) * 2007-06-06 2011-07-14 Xerox Corporation Feedback-based document handling control system
US20090115124A1 (en) * 2007-11-05 2009-05-07 Xerox Corporation Method and system for correcting lateral position error
US7686298B2 (en) 2007-11-05 2010-03-30 Xerox Corporation Method and system for correcting lateral position error
US20090134570A1 (en) * 2007-11-28 2009-05-28 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus
US8002275B2 (en) * 2007-11-28 2011-08-23 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus having a first skew feeding correction unit and a second skew feeding correction unit
US20090302145A1 (en) * 2008-06-10 2009-12-10 Xerox Corporation Printing web system
US20110040906A1 (en) * 2009-08-13 2011-02-17 Jaewoong Chung Multi-level Buffering of Transactional Data
US8083228B2 (en) * 2009-12-28 2011-12-27 Xerox Corporation Closed loop lateral and skew control
US20110156345A1 (en) * 2009-12-28 2011-06-30 Xerox Corporation Closed loop lateral and skew control
US20120065931A1 (en) * 2010-09-09 2012-03-15 Xerox Corporation Sheet thickness measurement apparatus
US8762103B2 (en) * 2010-09-09 2014-06-24 Xerox Corporation Sheet thickness measurement apparatus
US20120181743A1 (en) * 2011-01-18 2012-07-19 Fujitsu Limited Sheet transport device, sheet transport control method, and printer
US20160289026A1 (en) * 2015-03-31 2016-10-06 Brother Kogyo Kabushiki Kaisha Control System
US9695001B2 (en) * 2015-03-31 2017-07-04 Brother Kogyo Kabushiki Kaisha Control system
US20180265316A1 (en) * 2015-12-08 2018-09-20 Hewlett-Packard Development Company, L.P. Media alignment calibration
US10569980B2 (en) * 2015-12-08 2020-02-25 Hewlett-Packard Development Company, L.P. Media alignment calibration
US11260681B2 (en) 2017-02-07 2022-03-01 Hewlett-Packard Development Company, L.P. Print medium position detection
CN110261806A (zh) * 2019-06-14 2019-09-20 杭州优迈科技有限公司 驱动器、变频器以及驱动器的校准方法、控制方法

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CA2553357A1 (en) 2007-02-01

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