WO2009079967A1 - Imprimante à jet d'encre - Google Patents

Imprimante à jet d'encre Download PDF

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Publication number
WO2009079967A1
WO2009079967A1 PCT/CN2008/073744 CN2008073744W WO2009079967A1 WO 2009079967 A1 WO2009079967 A1 WO 2009079967A1 CN 2008073744 W CN2008073744 W CN 2008073744W WO 2009079967 A1 WO2009079967 A1 WO 2009079967A1
Authority
WO
WIPO (PCT)
Prior art keywords
medium
printing
ink
head unit
unit
Prior art date
Application number
PCT/CN2008/073744
Other languages
English (en)
Chinese (zh)
Inventor
Jun Feng
Weiwei Li
Original Assignee
Beijing Huaqi Information Digital Technology Co., Ltd.
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 Beijing Huaqi Information Digital Technology Co., Ltd. filed Critical Beijing Huaqi Information Digital Technology Co., Ltd.
Publication of WO2009079967A1 publication Critical patent/WO2009079967A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads

Definitions

  • the present invention relates to a typewriter or selective printing mechanism designed to characterize a printing or marking process, and more particularly to an ink jet printer capable of printing a viewable and optically readable code on the same side of a print medium.
  • FIG. 1 is a schematic diagram of a print medium printed with such invisible code, which makes people While obtaining the visual information, the above-mentioned information of the invisible coding is obtained by means of the electro-optical medium.
  • the optically readable invisible coding is a digital code that can be recognized by an optical identifier, the single code is very small and is generally dot-like, and wherein each of the basic units constituting the invisible code has a size of several tens of micrometers. It can't be observed by the naked eye under visible light conditions, and it does not affect the display of visual information such as actual patterns and texts.
  • the structure of a color inkjet printer of the prior art is described in the Chinese patent specification of CN 02 1 4 1 2 5 0. 2, published on Feb. 5, 003, as shown in FIG.
  • the ink jet printer structure includes four ink cartridges 61, a printhead unit 63, a carriage 64, a drive unit 65, a platen roller 66, and a cleaning unit 67.
  • Each ink cartridge 6 1 is filled with a specific color of ink such as blue, red, yellow or black.
  • the head unit 63 has an ink jet head 6 for performing a printing operation on the print medium 62.
  • the ink tank 6 1 and the print head unit 6 3 are mounted on the carriage 64.
  • the drive unit 6 5 reciprocates the carriage 64 in a linear manner.
  • the pressure roller 66 extends in the reciprocating direction of the carriage and faces the ink jet head 6.
  • the drive unit 6 5 includes a carriage shaft 7 1 , a guide plate 72 , a first pulley 7 3 , a second pulley 74 , and an endless belt 75 .
  • the carriage shaft 7 1 is disposed at the lower end of the carriage 64 and extends in a direction parallel to the platen roller 66.
  • the guide plate 72 is disposed at the upper end of the carriage 64 and extends in a direction parallel to the carriage axis 7 1 .
  • the pulleys 7 3 , 74 are disposed at both ends of the carriage shaft 7 1 and interposed between the carriage 64 and the guide plate 72.
  • the endless belt 7 5 extends between the two pulleys 7 3 , 74 .
  • the carriage 64 is connected to the endless belt 7 5 .
  • the carriage 64 connected to the endless belt 7 5 can follow along with the forward and reverse rotation of the first pulley 73.
  • the carriage shaft 7 1 and the guide plate 72 linearly reciprocate.
  • Paper 62 can be from a paper tray placed on one side or the lower part of a color inkjet printer (not shown) supply.
  • the paper 6 2 fed from the paper cassette is supplied between the nozzle surface 6 a of the ink jet head 6 facing vertically downward and the pressure roller 6 6 .
  • the nozzle surface 6a has a plurality of nozzles from which ink droplets can be ejected.
  • the printing operation can be performed on the sheet 6 2 between the nozzle surface 6 a and the pressure roller 6 6 by the ink droplet ejected from the ink-jet head 6. Then, the paper 6 2 is discharged from the color inkjet printer.
  • the cleaning device 6 7 is disposed at a pressing roller 6 6 extending in the moving direction of the carriage to prevent bubbles formed in the ink and ink and paper dust adhering to the nozzle surface 6 a of the ink jet head 6 from being sprayed. failure.
  • the printing technology of the existing printer can only print a single visual graphic or optically readable code in one printing process, and cannot fundamentally solve the simultaneous printing of the visual graphic and the printing process in one printing process.
  • the problem of optically readable coding Under this printer structure, if you need to print visual graphics and optically readable codes on the same print media, you need to print one of them first, and then replace the ink cartridge or replace another printer to achieve another graphic. The printing process, the whole process is obviously very inconvenient.
  • the present invention is an ink jet printer based on the above-described drawbacks of the prior art, by which a technique for printing visual graphics and optically readable codes on the same print medium in one printing process. Summary of the invention
  • An object of the present invention is to provide an ink jet printer which simultaneously prints a visible pattern and an optically readable code on the same printing medium in one printing process.
  • An inkjet printer comprising a printhead unit, an ink cartridge mounted on the printhead unit, a platen corresponding to the printhead unit, and a media transfer mechanism, wherein the printhead unit includes a print medium along the print medium a first print head unit and a second print head unit arranged in sequence; a first ink cartridge and a second ink cartridge are respectively mounted on the first print head unit and the second print head unit; Any one of the ink cartridge and the second ink cartridge contains a photosensitive substance, and the other ink cartridge does not contain the photosensitive material.
  • the photosensitive material means a light which is capable of inducing or exciting a photoreaction so that the code printed on the printing medium can be made sensitive to the photosensitive substance.
  • the photosensitive material comprises carbon or a fluorescent substance; that is, one of the ink tanks of the first ink tank and the second ink tank is a carbon-free ink, and the other ink tank is a carbon-containing ink.
  • the ink of any one of the first ink cartridge and the second ink cartridge contains a fluorescent substance
  • the ink of the other ink cartridge contains no fluorescent substance.
  • the first print head unit and the second print head unit are sequentially disposed on the same side or on the opposite side of the print medium.
  • the first platen roller and the second platen roller rotate in the same direction, and the corresponding positions of the first print head unit and the second print head unit are respectively provided with a first platen roller and a second platen roller.
  • the tangential direction of the rotation direction of the first platen roller and the second platen roller and the tangent of the printing medium coincide with the conveying direction of the printing medium.
  • the medium conveying mechanism includes a first guiding groove respectively disposed upstream of the first printing head unit and a second guiding groove disposed between the first printing head unit and the second printing head unit.
  • the first guiding groove and the second guiding groove comprise two V-shaped guiding plates arranged symmetrically along the axis of the printing medium, wherein the guiding grooves are open on both sides, wherein the opening is larger One side is disposed upstream of the printing medium conveying direction.
  • the medium conveying mechanism further includes a steering portion disposed upstream of the first print head unit and downstream of the second print head unit, wherein the steering portion is provided with a steering groove; the medium conveying mechanism further includes at least A pair of registration rollers, the direction of rotation of the pair of registration rollers and the tangential direction of the tangent of the printing medium coincide with the direction of transport of the printing medium.
  • the medium conveying mechanism further includes a paper feeding mechanism located downstream of the second printing head unit and a driving motor of the paper feeding mechanism; the paper feeding mechanism includes a circulating paper feeding belt, and the circulating paper feeding belt has a plurality of equally spaced spaces The paper feed needle is arranged in a raised manner, and the drive motor is connected to the drive shaft of the paper feed mechanism.
  • the printing method of the inkjet printer comprises the following steps: the printing medium is conveyed by the medium conveying mechanism into the first platen roller, and is printed by the first printing head unit corresponding to the first platen roller and containing the photosensitive substance ink cartridge. Printing an optically readable code on the medium, after the printing is completed, the printing medium enters the second platen roller by the printing conveying mechanism, and the second printing head unit corresponding to the second platen roller does not contain the photosensitive material ink cartridge Graphic, the print medium is output by the transport mechanism after being printed twice.
  • the printing method of the inkjet printer comprises the steps of: the printing medium being conveyed by the medium conveying mechanism into the first platen roller, and the first printing head unit corresponding to the first platen roller and not containing the photosensitive substance ink cartridge is mounted Printing an optically readable code on the printing medium. After printing, the printing medium enters the second platen roller by the medium conveying mechanism, and is printed by the second printing head unit corresponding to the second platen roller and containing the photosensitive substance ink cartridge. In the view shape, the print medium is output by the media transfer mechanism after being printed twice.
  • the invention controls the operation flow of the computer program, the printing program is controlled by the computer, the conveying direction of the conveying system is set, the conveying medium is printed according to the printing method, and the visible graphic and the optically readable code are simultaneously printed in one printing process. .
  • the present invention has the beneficial effects compared with the prior art in that:
  • the technical solution provided by the present invention solves the simultaneous completion of printing of visual graphics and optically readable codes in one printing process, accomplishing the task that the prior art printer cannot accomplish.
  • the design of the medium conveying mechanism adopted by the technical solution of the present invention greatly reduces the volume of the printer, the paper feeding route is more refined, the accuracy is high, and the positioning transmission is accurate.
  • the printer described in the technical solution of the present invention is convenient to operate, and the entire process is automatically completed by the computer controlled by the computer, thereby avoiding troubles and errors caused by separate printing and the like.
  • the present invention provides an ink jet printer which simultaneously prints a visible pattern and an optically readable code on the same print medium in one printing process.
  • Figure 1 is a schematic view of a print medium printed with a visual graphic and an optically readable code according to the present invention
  • FIG. 2 is a schematic structural view of a prior art inkjet printer
  • Figure 3 is a side elevational view showing the structure of the printer of the first embodiment of the present invention.
  • 4 is a partially enlarged schematic view showing a guide groove in the first embodiment of the present invention;
  • FIG. 5 is a partially enlarged schematic view showing a turning portion in the first embodiment of the present invention;
  • first print head unit 2 second print head unit 3 first platen roller 4 second platen roller 5 first steering portion 6 inkjet head
  • the graphics described in the description section include patterns and text.
  • a preferred embodiment of the present invention employs an embodiment in which two print head units are sequentially and in parallel arranged on the same side of the printing medium, and the photosensitive material described in the present invention refers to a specific kind of light incident under A substance that produces a special absorption or that produces unique properties, such as: Carbon can absorb a large amount of infrared light, and a fluorescent substance can generate visible light particles under ultraviolet light.
  • Figure 3 is a side elevational view showing the structure of a printer according to a first embodiment of the present invention, the printer including a first printhead unit 1 and a second printhead unit 2, the first ink tank unit and the second ink tank unit according to the existing
  • the mounting manner of the printer ink tank of the technology is respectively installed on the first print head unit 1 and the second print head unit 2 (not shown), and the first print head unit 1 and the second print head unit 2 are The same side of the printing medium is sequentially and in parallel along the conveying direction A of the printing medium.
  • the printer structure of the present invention further includes a first platen roller 3 and a second platen roller 4 respectively disposed corresponding to the first printhead unit 1 and the second printhead unit 2, the two platen rollers 3, 4 along The printing medium conveying direction A is sequentially and in parallel. At the same time, the axes of the first platen roller 3 and the second platen roller 4 are perpendicular to the conveying direction of the printing medium, respectively. The first platen roller 3 and the second platen roller 4 are rotated in the same direction, and the tangential direction of the direction in which the two platen rollers 3, 4 are tangential to the printing medium is aligned with the conveying direction of the printing medium A.
  • a pick-up roller 8 is provided at an upstream end of the transport direction of the printing medium for transferring the printing medium stored in the medium storage cassette to the medium conveying mechanism, and the first turning is provided in the printing medium conveying direction A at the pick-up roller 8.
  • the structure of the first steering portion 5 is as shown in FIG. 5, and includes a first steering rail 51 and a second steering rail 52 (as shown in FIG. 5).
  • the surfaces of the steering rails 51, 52 are two arcs having the same center.
  • the two curved surfaces form a steering groove 54.
  • the center of the circle is provided with a deflection roller 53 tangential to the two curved surfaces, and the printing medium is conveyed through the steering groove 54.
  • a first pair of registration rollers 10 is disposed downstream of the first steering portion 5 in the direction of media transport, and the first pair of registration rollers 10 is composed of two rollers that rotate in opposite directions along respective axes to achieve positioning and transport of the media. Therefore, in order to ensure that the medium is conveyed in the specified direction, the tangential direction of the first registration roller pair 10 tangential to the printing medium should be the same as the conveying direction A of the printing medium.
  • the printing medium is transferred from the horizontal direction to the vertical direction.
  • the first positioning roller unit 10 and the second printing head unit 2 are sequentially disposed in parallel along the same side downstream of the printing medium conveying direction, and the first platen roller 3 and the second platen roller 4 corresponding thereto are disposed.
  • there are two sets of carriages, drive units and cleaning units for printing, and the ink tank and print head unit are mounted on the carriage.
  • the driving unit linearly reciprocates the carriage, and the pressing roller extends in the reciprocating direction of the carriage, so that each set of the printer setting structure according to the prior art is respectively corresponding to the corresponding print head unit 1, 2 and the platen roller 3, 4 Match.
  • the drive unit drives the carriage to reciprocate, so that the ink jet heads on the print head units 1, 2 are ejected at designated positions to complete the printing task.
  • the first print head unit 1 and the corresponding first platen roller 3 and the associated carriage, drive unit, cleaning unit and the like cooperate to complete the printing task, wherein the first ink cartridge unit uses carbon-containing ink for infrared light.
  • Read the encoded print The second print head unit 2 and the corresponding first platen roller 4 and the associated carriage, drive unit, cleaning unit and the like cooperate to complete the printing task, wherein the second ink cartridge unit uses carbon-free ink for visual graphics Print.
  • the two sets of mechanisms for printing infrared readable codes and visual graphics are independent of each other, and the two printing programs are independently performed by different mechanisms.
  • a first guiding groove 11 is disposed between the first printing head unit 1 and the first positioning roller pair 10.
  • the structure of the first guiding groove 11 is as shown in FIG. 4, and includes two axially symmetric directions along the vertical conveying direction of the printing medium.
  • the first guide plate 111 and the second guide plate 112 are arranged in a V shape, and a gap is formed between the guide plates 111 and 112, and openings are formed at both ends thereof, wherein a larger opening side is provided upstream of the printing medium conveying direction.
  • the first guiding groove 11 is detachably fixed in the printer casing and fixed by the positioning pin 113.
  • the edges of the guide plates 111, 112 are arranged in a circular arc shape, which is advantageous for the smooth transition of the printing medium and for the positioning and fixing of the guide plates 111, 112. This arrangement allows the medium passing through the first registration roller pair 10 to smoothly enter the first guide groove 11 along the larger opening end, and is discharged from the smaller end of the opening into the first platen roller 3, thereby ensuring accurate paper feed.
  • a second pair of registration rollers 12 having the same structure as the first registration roller pair 10 and the structure of the first guide groove 11 are sequentially disposed in the medium conveying direction A.
  • the same second guiding groove 13 allows the medium printed by the first head unit 1 to smoothly and accurately enter the second platen roller 4 and be printed by the second head unit 2.
  • a second steering portion 7 having the same structure as that of the first steering portion 5 is disposed in the downstream direction of the second printhead unit 2, so that the conveying direction of the medium is transferred from the vertical conveyance to the horizontal conveyance, which is more advantageous for the medium to finally eject the paper horizontally from the printer. This minimizes the paper path of the media in the printer, improves efficiency, and reduces the possibility of accidents such as paper jams.
  • a paper feeding mechanism 9 is disposed at the outlet of the printing medium.
  • the paper feeding mechanism 9 includes a conveying belt 91.
  • the conveying belt 91 has a plurality of paper feeding needles arranged in a convex manner at equal intervals to increase the friction force, and drive the motor 90 and the driving.
  • the drive shaft of the paper mechanism 9 is connected.
  • the conveying direction of the belt 91 is the same as the conveying direction of the printing medium, so that the medium can be smoothly discharged from the printer.
  • a positioning roller pair 1 7 having the same structure as that of the pair of registration rollers 10 and 1 1 and steering can be provided to ensure accurate paper feeding.
  • the ink jet printer having the above structure is connected to a main body device, such as a computer, and the transfer direction of the transport system is set according to the control program of the control system.
  • the printing medium enters the first turning portion 5 via the pick-up roller 8 and enters from the larger end of the opening of the turning groove 514, and is led out from one end of the small opening of the turning groove 504 to enter the first positioning roller pair 10 and the first guiding groove. The larger end of the 1 1 opening. After the medium is led out from the smaller opening of the first guiding groove 1 1 , since the first positioning roller pair 10 and the first guiding groove 1 1 continuously correct the position of the medium, the printing medium is accurately entered into the first platen roller. 3.
  • the ink jet head is disposed vertically downward, and the medium enters between the first platen roller 3 and the nozzle surface of the ink jet head, and the nozzle surface has a plurality of nozzles from which ink droplets can be ejected.
  • the printing operation can be performed on the medium between the nozzle surface and the first platen roller 3 by the ink droplet ejected from the ink jet head.
  • the ink in the ink cartridge mounted on the first printhead unit 1 is a carbon-containing ink, so that an ink cartridge of a monochromatic carbon-containing ink can be used to realize infrared-readable printing.
  • the printed medium enters the second platen roller 4 through the second registration roller pair 1 2 and the second guide groove 13 in the medium conveying direction A, and is printed on the corresponding second head unit 2.
  • the ink tank on the second print head unit 2 selects the ink containing no carbon as needed, so that a monochrome ink tank or a four-color ink tank can be used to complete the printing of the monochrome visible image or the color visible graphic.
  • the printing medium printed with two different patterns of infrared readable code and ordinary visible pattern is transferred to the horizontal direction by the second turning portion 7, and is aligned by the third positioning roller pair 1 4 by the paper feeding
  • the mechanism 9 exports it to the printer, and the whole process is automatically completed by the printer according to a preset program, which is convenient and quick, and avoids the error and trouble caused by the human operation.
  • the same structure and medium transfer mechanism as in the first embodiment are employed, except that the first ink cartridge unit mounted on the first print head unit 1 is selected from ink containing a fluorescent substance.
  • the second ink cartridge unit mounted on the second printhead unit 2 selects an ordinary phosphor-free ink. Since the ultraviolet light excites the fluorescent substance to fluoresce, the pattern of the ink to which the fluorescent substance is added is printed by the ultraviolet light, thereby enabling printing of the ultraviolet readable code.
  • the second ink tank mounted on the second head unit 2 must be determined to be free of fluorescent substances, and a monochrome or multi-color ink tank can be selected as needed to effect printing of ordinary visible patterns. Therefore, the purpose of simultaneously printing the ultraviolet readable code and the visible pattern on the same side of the print medium can be achieved.
  • the first ink cartridge unit on the first printhead unit 1 in the first embodiment described above is made of carbon-free ink
  • the second inkjet unit 2 is second.
  • the ink tank unit adopts ordinary carbon-containing ink, thereby realizing a process of printing a normal pattern and then printing an infrared light readable code during printing; or, on the first print head unit 1 in the second embodiment described above
  • the first ink cartridge unit uses ink containing no fluorescent substance
  • the second ink cartridge unit on the second printhead unit 2 uses ink containing a fluorescent substance, thereby realizing printing of a common pattern and then printing ultraviolet during printing.
  • the process of optically readable coding is
  • the medium transport mechanism differs in that two print head units are respectively disposed on both sides of the print medium such that visual graphics and optically readable codes can be printed on both sides of the print medium.
  • the optically readable invisible code printed by the printer using the above structure is composed of a two-dimensional lattice, preferably a dot, and the size of each dot and the distance between them are preferably 10 ⁇ m - 5 0 A value in ⁇ m that allows the human eye to be unrecognizable and can only obtain the invisible coded component image through an optical detector, and then convert the acquired image into information that the corresponding subject device can recognize, such as digital information.
  • the two commonly used technical solutions have been described above to realize the optical detector's identification of optically readable invisible codes. More specifically, the two solutions utilize different printing inks for infrared light and ultraviolet light absorption, respectively. Rate different characteristics.
  • the first technical solution is based on the improvement of existing printed inks.
  • the inks currently printed are printed in four colors of CMYB (cyan, magenta, yellow and black) to print the text and the color of the pattern. Because cyan, magenta, and yellow can make up most of the color in visible light. Therefore, usually the printed product uses the above three colors to match the chromaticity and saturation, and the black to adjust the brightness. At the same time, the absorption rates of cyan, magenta and yellow are very low, while the absorption of infrared light by black due to carbon is quite high. Therefore, when infrared light is used to illuminate the printed surface, the black light can be captured by the reflected infrared light. Printed invisible code without interference from the other three colors.
  • CMYB cyan, magenta, yellow and black
  • the cyan, magenta and yellow colors can easily be blended with black-like oil as a substitute for carbon-containing black oil, so there is no printing failure. Therefore, the first technical solution is achieved by using the black ink used in the original printer as a special ink as the ink for printing the coded dot matrix, and using the other three inks to print the surface information of the planar carrier;
  • the two options are to take advantage of the fact that most of the inks absorb UV light. Most inks do not produce other visible spectra when exposed to ultraviolet light. However, some special inks produce visible light under ultraviolet light. For example, fluorescent inks will excite photons to generate visible light when exposed to ultraviolet light. Thus, the encoded information is printed with fluorescent ink and printed with ordinary ink.
  • the surface information carried on the planar carrier so that the surface is irradiated with ultraviolet light, and the reflected light is filtered through the filter to filter out the same spectrum as the colored light, so that the optical device can be clearly obtained.
  • These encoded information there are various technical solutions that enable the optical device to recognize the above-described stealth code without being affected by the surface information, and are not described here.

Abstract

Selon la présente invention, une imprimante à jet d'encre comprend une première unité de tête d'impression (1) et une seconde unité de tête d'impression (2) qui sont disposées tour à tour dans le sens de transfert du support, des cartouches d'encre montées sur les unités de tête d'impression, des rouleaux de platine (3, 4) correspondant aux unités de tête d'impression et un mécanisme de transfert de support. La première et la seconde unité de tête d'impression sont équipées de la première et de la seconde cartouche d'encre, respectivement. L'encre contenue dans la première ou la seconde cartouche contient une substance photosensible et l'encre contenue dans la cartouche restante est dépourvue de ladite substance. L'imprimante peut imprimer des motifs visibles et des codes lisibles par un système optique en même temps au cours d'un seul procédé d'impression.
PCT/CN2008/073744 2007-12-26 2008-12-26 Imprimante à jet d'encre WO2009079967A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710301758.9 2007-12-26
CNA2007103017589A CN101468555A (zh) 2007-12-26 2007-12-26 喷墨打印机

Publications (1)

Publication Number Publication Date
WO2009079967A1 true WO2009079967A1 (fr) 2009-07-02

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Application Number Title Priority Date Filing Date
PCT/CN2008/073744 WO2009079967A1 (fr) 2007-12-26 2008-12-26 Imprimante à jet d'encre

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WO (1) WO2009079967A1 (fr)

Cited By (1)

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WO2010105190A1 (fr) * 2009-03-13 2010-09-16 E. I. Du Pont De Nemours And Company Matière imprimée fournissant des informations pouvant être lues de façon optique

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SG11201906770QA (en) * 2017-02-02 2019-08-27 Memjet Technology Ltd Roller feed mechanism for printer having multiple printheads
AU2018265453B2 (en) * 2017-05-12 2020-07-09 Memjet Technology Limited Mist extraction system for inkjet printer

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US5488458A (en) * 1995-05-08 1996-01-30 Xerox Corporation Duplex printing integrity system
US5683187A (en) * 1996-06-18 1997-11-04 Scitex Digital Printing, Inc. Digital color press platen assembly with pivoting platen frame
US6079327A (en) * 1994-06-20 2000-06-27 Pitney Bowes Inc. Dual color non-impact printing for postage meters
CN1613922A (zh) * 2004-09-20 2005-05-11 邱华生 防伪专用打印墨水及其制造方法
CN1939727A (zh) * 2005-09-28 2007-04-04 三星电子株式会社 具有混合喷墨头和喷墨头擦拭装置的图像形成设备

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US6079327A (en) * 1994-06-20 2000-06-27 Pitney Bowes Inc. Dual color non-impact printing for postage meters
US5488458A (en) * 1995-05-08 1996-01-30 Xerox Corporation Duplex printing integrity system
US5683187A (en) * 1996-06-18 1997-11-04 Scitex Digital Printing, Inc. Digital color press platen assembly with pivoting platen frame
CN1613922A (zh) * 2004-09-20 2005-05-11 邱华生 防伪专用打印墨水及其制造方法
CN1939727A (zh) * 2005-09-28 2007-04-04 三星电子株式会社 具有混合喷墨头和喷墨头擦拭装置的图像形成设备

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Publication number Priority date Publication date Assignee Title
WO2010105190A1 (fr) * 2009-03-13 2010-09-16 E. I. Du Pont De Nemours And Company Matière imprimée fournissant des informations pouvant être lues de façon optique

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