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WO2018188737A1 - Appareil d'impression - Google Patents

Appareil d'impression Download PDF

Info

Publication number
WO2018188737A1
WO2018188737A1 PCT/EP2017/058701 EP2017058701W WO2018188737A1 WO 2018188737 A1 WO2018188737 A1 WO 2018188737A1 EP 2017058701 W EP2017058701 W EP 2017058701W WO 2018188737 A1 WO2018188737 A1 WO 2018188737A1
Authority
WO
WIPO (PCT)
Prior art keywords
mark
substrate
web
image
controller
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.)
Ceased
Application number
PCT/EP2017/058701
Other languages
English (en)
Inventor
Nimrod LUCAS
Ofer HOLLENBERG
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.)
HP Indigo BV
Original Assignee
HP Indigo BV
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 HP Indigo BV filed Critical HP Indigo BV
Priority to PCT/EP2017/058701 priority Critical patent/WO2018188737A1/fr
Publication of WO2018188737A1 publication Critical patent/WO2018188737A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5062—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the characteristics of an image on the copy material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6517—Apparatus for continuous web copy material of plain paper, e.g. supply rolls; Roll holders therefor
    • G03G15/652—Feeding a copy material originating from a continuous web roll
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6582—Special processing for irreversibly adding or changing the sheet copy material characteristics or its appearance, e.g. stamping, annotation printing, punching

Definitions

  • Printing systems such as liquid electro photographic (LEP) printers may form images on a photoconductive member using liquid toner and the like. The images may be transferred to an intermediate member on which they are dried. The images may then be transferred to media.
  • LEP liquid electro photographic
  • Figure 1 is a simplified schematic of an example of a printing apparatus
  • Figure 2 is a simplified schematic of an example of a printing device
  • Figure 3 shows an example of a substrate
  • Figure 4 is a flowchart of an example of a method of printing
  • Figure 5 is a flowchart of an example of a method of printing.
  • Figure 6 is a simplified schematic of an example of a printing device.
  • Printing systems such as liquid electro photographic (LEP) printers include a printing assembly that transfers an image to a substrate.
  • An image formed on the substrate may comprise multiple layers of print agent.
  • the substrate is manipulated in the vicinity of the printing assembly whilst the image is being applied to the substrate. For example, the tension of the substrate, which affects the length of a section of substrate, and/or the velocity of the substrate may be varied. This may affect the size of images on the substrate, and image size may differ from an intended image size.
  • Figure 1 shows an example of an apparatus 100 that includes a marking assembly 102, a printing assembly 104 and a controller 106.
  • the marking assembly 102 prints a mark on a substrate 108.
  • the marking assembly applies the mark to the substrate 102 in a mechanical manner, such as for example using a stamp to transfer print agent and/or a deformation to the substrate 108.
  • Providing a mechanical assembly may assist in achieving a consistent placement of marks as it may be unaffected or less affected by changes in speed, movement direction and/or tension of other parts of the substrate, such as for example a region of the substrate near the printing assembly.
  • the marking assembly 102 prints a mark on the substrate 108 as the substrate 108 moves past the marking assembly 102.
  • the velocity and/or tension of a section the substrate 108 to which the marking assembly 102 applies the mark is regulated, such that for example the velocity and/or tension is substantially constant with little variation.
  • the mark may be applied to the substrate 108 in an accurate manner.
  • the size of the mark, and/or the distance between the mark and another mark that may be on the substrate 108 is substantially constant and may be known.
  • a property of a section of the substrate 108 to which the mark is applied is controlled in a well-defined manner.
  • the substrate may pass between a pair of rollers and the rollers may be controlled to impart a certain velocity and/or tension to the substrate.
  • one roller in a pair of rollers that controls velocity and/or tension may also include a marking assembly to apply the mark to the substrate.
  • the tension of the substrate may be kept relatively high (i.e. the substrate is held at a tight tension) to assist in providing consistent placement.
  • a "dancer assembly" comprising a plurality of relatively repositionable rollers may be used to control the tension of the section of substrate.
  • the printing assembly 104 applies an image to the substrate 108.
  • the image may be applied to the same side of the substrate as the mark, or the opposite side.
  • the controller 106 detects the mark and controls a substrate transport parameter based on the detection of the mark.
  • the substrate transport parameter comprises at least one of the velocity, position and tension of a section of the substrate 108 in the vicinity of the printing assembly 104.
  • the controller 106 corrects the velocity, position and/or tension of the section of the substrate in the vicinity of the printing assembly 104 such that the image applied to the substrate 108 by the printing assembly 104 is at a certain position on the substrate 108 and/or of a certain size on the substrate 108.
  • the marking assembly is to apply a further mark to the substrate, and the controller arrangement is to detect the mark and the further mark and to control the transport parameter based on the detection of the mark and the detection of the further mark. Therefore, for example, the printing assembly 104 may print further images, such as repeat images, and the substrate transport parameter may be controlled such that the position and/or size of at least one of the images on the substrate 108 may be controlled.
  • the further mark may be a repeat occurrence of the mark. The mark may be repeated one or more times on the substrate 108 in a direction along which the substrate 108 moves through the printing apparatus 100. Providing multiple marks allows the relative spacing of the marks to be monitored. In addition, for example, multiple parts of the substrate may be monitored, and/or the substrate may be monitored on an ongoing basis as the substrate moves through a printing device.
  • the controller 106 may include a sensor such as for example an optical sensor or a camera to detect the absolute position of the mark on the substrate.
  • the absolute position can be used to correct the velocity, tension and/or position of a section of the substrate to which the image is applied.
  • the controller 106 may include a sensor, such as for example an optical sensor or camera, to determine the relative positions of the mark and the image. For example, the controller may determine the distance between the mark and the image.
  • the controller 106 may adjust the web transport parameter to ensure that the distance tends towards the expected distance in subsequent prints and hence the images on the substrate have the expected position and/or size.
  • the controller 106 may include a first sensor that is used by the controller 106 to determine the absolute position of the mark, and a second sensor to determine the relative positions of the mark and the image, and the controller uses data from both sensors to control the substrate transport parameter.
  • multiple marks may be applied to the substrate by the marking assembly 102 and detected by the controller 106. Detection of multiple marks can be used to control the substrate transport parameter. For instance, in some examples, the marks are detected by the controller 106 over a period of time and can therefore be used to control the web transport parameter over a period of time. In some examples, properties of multiple marks, such as for example the distance between marks or the frequency of detection of the marks, can be used by the controller 106 to control the substrate transport parameter.
  • FIG. 2 shows an example of an apparatus 200 that may be a printing device.
  • the apparatus 200 includes a marking assembly 202, a printing assembly 204 and a controller 206.
  • the controller 206 includes a first optical sensor 208 and a second optical sensor 214 to optically detect the mark on a web 210.
  • the controller 206 controls a web transport apparatus 212 to control a web transport parameter based on detection of the mark by the optical sensor 208.
  • the first optical sensor 208 may be positioned upstream of the printing assembly and the second optical sensor 214 may be positioned downstream of the printing assembly.
  • the marking assembly 202 may print a mark on the web 210
  • the printing assembly 204 may apply an image to the web 210.
  • the controller 206 controls at least one of the velocity, position and tension of a section of the web 210 in the vicinity of the printing assembly 204.
  • the controller 206 using the optical sensor 208 may sense the absolute position of the mark, the relative positions of the mark and the image and/or a property of multiple marks such as frequency to control the web transport parameter using the web transport apparatus 212.
  • a single sensor may sense the marks.
  • multiple sensors may sense the mark, and/or other features. For example, a first sensor may detect the mark, whereas a second sensor may detect the image, or the mark and the image, and provide a feedback signal to the controller.
  • Figure 2 shows a first optical sensor 208 and a second optical sensor 214 accordingly.
  • Figure 3 shows an example of a substrate 300.
  • the substrate 300 has printed thereon a plurality of images 302. These images may be different or may be the same image repeated multiple times.
  • the substrate 300 also includes a plurality of marks 304.
  • the marks 304 may be different or may be identical. In the example shown, the marks 304 are identical and repeated at fixed intervals in a direction along which the substrate 300 moves through a printing apparatus.
  • the substrate moves through a printing device generally in a direction illustrated by arrow 306 in Figure 3, though in some examples the direction may be reversed at times during printing.
  • the marks 304 are arranged along a line in the direction 306.
  • the images 302 are also aligned along this direction, adjacent to the marks 304.
  • a detector may determine the frequency at which the marks 304 move past a sensor and/or may determine the distance between marks 304 to determine a property of substrate movement through a printing device. For example, if the velocity is known, the distance between or frequency of the marks may indicate substrate tension.
  • the marks can be used to determine substrate velocity.
  • Information from detection of the marks 304 can be used by a controller to adjust a substrate transport parameter, for example to control substrate velocity and/or tension to a predetermined value.
  • a part of an image may be aligned with a mark.
  • the intended relative positions of a part of a mark and a part of an image may be fixed.
  • the intended relative positions may be achieved.
  • the mark could be detected subsequent to printing, and the media may be manipulated to ensure that subsequently printed images are suitably positioned and/or aligned.
  • the detection of a mark may allow an edge of an image such as the leading edge may be aligned in a direction perpendicular to the movement direction with an edge of a mark such as the leading edge.
  • the end of an image may be aligned with a mark.
  • multiple parts of an image may each be aligned with a respective mark.
  • the images are not aligned with the marks, and the marks are used to determine substrate properties such as position, velocity and tension.
  • Figure 4 shows an example of a method 400, which may be a method of printing on a substrate.
  • a mark is transferred to a substrate using a first image forming apparatus.
  • the substrate is monitored to detect the mark.
  • the substrate is manipulated based on detection of the mark.
  • an image is transferred to the substrate using a second image forming apparatus.
  • the substrate is manipulated such that the image on the substrate has a well-defined size and/or position.
  • the substrate may be manipulated such that the image on the substrate has a desired size and/or position. Therefore, for example, the absolute position of the mark, and/or the relative positions of the mark and the image, may be used to manipulate the substrate (prior to printing the image and/or as part of a feedback loop) to ensure that the image on the substrate is at a desired position and/or has a desired size, or the size and/or position are within defined tolerances. In some examples, the velocity and/or tension of the substrate may be manipulated.
  • Figure 5 shows an example of a method 500, which may be a method of printing on a substrate.
  • the method includes block 500, in which a mark is transferred to a substrate using a first image forming apparatus by stamping the mark onto the substrate.
  • a mechanical system to apply the mark to a substrate may in some examples ensure that the mark is transferred accurately, with an accurate position and/or size.
  • the mark is transferred using a pair of rollers that pinch the substrate, with a stamp shape being located on an outer surface of one of the rollers.
  • the substrate is monitored to detect the mark, and in block 506, the substrate is manipulated based on detection of the mark by varying at least one of a velocity, position and tension of the substrate.
  • a further mark is transferred to the substrate, and the substrate is monitored the substrate to detect the further mark, and the substrate is manipulated based on the position of the mark and the position of the further mark. Therefore, in some examples, the size and/or position of multiple images on the substrate may be based on detection of the marks, and/or the size and/or position of a single image on the substrate may be based on detection of the marks.
  • an image is transferred to the substrate using a second image forming apparatus. In some examples, the substrate is manipulated by manipulating a section of the substrate, and an image may be transferred to this section.
  • FIG. 6 shows an example of a printing device 600.
  • the printing device 600 includes a marking stamp that stamps at least one mark on print media 604.
  • Monitoring apparatus 606 may monitor the print media for presence of the mark.
  • a control system 608 may manipulate the print media based on detection of the mark by the monitoring apparatus 606.
  • a print agent transfer engine 610 may transfer a layer of print agent to the print media 604.
  • the marking stamp 602 may apply a consistent mark to the print media, that is, a mark that has an accurate and well-defined position and/or size.
  • the marking stamp 602 may stamp multiple marks on the print media 604.
  • control system may manipulate a property of the print media, such as velocity or tension, in at least a region of the print media to which the print transfer engine is to apply the image. Such manipulation may ensure that the image applied to the substrate has a consistent position and/or size on the print media.
  • Examples in the present disclosure can be provided at least in part as methods, systems or machine readable instructions, such as any combination of software, hardware, firmware or the like.
  • Such machine readable instructions may be included on a computer readable storage medium (including but is not limited to disc storage, CD-ROM, optical storage, etc.) having computer readable program codes therein or thereon.
  • the machine readable instructions may, for example, be executed by a general purpose computer, a special purpose computer, an embedded processor or processors of other programmable data processing devices to realize the functions described in the description and diagrams.
  • a processor or processing apparatus may execute the machine readable instructions.
  • functional modules of the apparatus and devices may be implemented by a processor executing machine readable instructions stored in a memory, or a processor operating in accordance with instructions embedded in logic circuitry.
  • the term 'processor' is to be interpreted broadly to include a CPU, processing unit, ASIC, logic unit, or programmable gate array etc.
  • the methods and functional modules may all be performed by a single processor or divided amongst several processors.
  • Such machine readable instructions may also be stored in a computer readable storage that can guide the computer or other programmable data processing devices to operate in a specific mode.
  • Such machine readable instructions may also be loaded onto a computer or other programmable data processing devices, so that the computer or other programmable data processing devices perform a series of operations to produce computer-implemented processing, thus the instructions executed on the computer or other programmable devices realize functions specified by flow(s) in the flow charts and/or block(s) in the block diagrams.
  • teachings herein may be implemented in the form of a computer software product, the computer software product being stored in a storage medium and comprising a plurality of instructions for making a computer device implement the methods recited in the examples of the present disclosure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

Dans un exemple, la présente invention concerne un appareil qui comprend un ensemble de marquage pour imprimer une marque sur une bande, un ensemble d'impression pour appliquer une image à la bande et un dispositif de commande pour détecter la marque et pour commander un paramètre de transport de bande en fonction de la détection de la marque.
PCT/EP2017/058701 2017-04-11 2017-04-11 Appareil d'impression Ceased WO2018188737A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/058701 WO2018188737A1 (fr) 2017-04-11 2017-04-11 Appareil d'impression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/058701 WO2018188737A1 (fr) 2017-04-11 2017-04-11 Appareil d'impression

Publications (1)

Publication Number Publication Date
WO2018188737A1 true WO2018188737A1 (fr) 2018-10-18

Family

ID=58537000

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/058701 Ceased WO2018188737A1 (fr) 2017-04-11 2017-04-11 Appareil d'impression

Country Status (1)

Country Link
WO (1) WO2018188737A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103612477A (zh) * 2013-07-22 2014-03-05 陈尔余 一种组机式多色平压平烫印自动生产装置
US20140085368A1 (en) * 2012-09-26 2014-03-27 Xerox Corporation System and Method for First and Second Side Process Registration in a Single Print Zone Duplex Web Printer
US9044974B1 (en) * 2014-02-18 2015-06-02 Xerox Corporation System and method for online web control in a tandem web printing system
US9387670B1 (en) * 2015-06-26 2016-07-12 Eastman Kodak Company Controlling a printing system using encoder ratios
US20170057213A1 (en) * 2014-07-24 2017-03-02 Hewlett-Packard Development Company, L.P. Front-to-back registration of printed content

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140085368A1 (en) * 2012-09-26 2014-03-27 Xerox Corporation System and Method for First and Second Side Process Registration in a Single Print Zone Duplex Web Printer
CN103612477A (zh) * 2013-07-22 2014-03-05 陈尔余 一种组机式多色平压平烫印自动生产装置
US9044974B1 (en) * 2014-02-18 2015-06-02 Xerox Corporation System and method for online web control in a tandem web printing system
US20170057213A1 (en) * 2014-07-24 2017-03-02 Hewlett-Packard Development Company, L.P. Front-to-back registration of printed content
US9387670B1 (en) * 2015-06-26 2016-07-12 Eastman Kodak Company Controlling a printing system using encoder ratios

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