EP1217454A2 - Machine d'impression ou à copier numérique - Google Patents

Machine d'impression ou à copier numérique Download PDF

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Publication number
EP1217454A2
EP1217454A2 EP01127779A EP01127779A EP1217454A2 EP 1217454 A2 EP1217454 A2 EP 1217454A2 EP 01127779 A EP01127779 A EP 01127779A EP 01127779 A EP01127779 A EP 01127779A EP 1217454 A2 EP1217454 A2 EP 1217454A2
Authority
EP
European Patent Office
Prior art keywords
suction belt
printing
substrate
copying machine
machine according
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.)
Granted
Application number
EP01127779A
Other languages
German (de)
English (en)
Other versions
EP1217454A3 (fr
EP1217454B1 (fr
Inventor
Gerhard Dr. Bartscher
Frank Morgenweck
Detlef Schulze-Hagenest
Domingo Rohde
Kai-Uwe Preissig
Ralf Allner
Thomas Biber
Markus Weber
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
NexPress Solutions LLC
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26008052&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1217454(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE10113885A external-priority patent/DE10113885A1/de
Application filed by Eastman Kodak Co, NexPress Solutions LLC filed Critical Eastman Kodak Co
Publication of EP1217454A2 publication Critical patent/EP1217454A2/fr
Publication of EP1217454A3 publication Critical patent/EP1217454A3/fr
Application granted granted Critical
Publication of EP1217454B1 publication Critical patent/EP1217454B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
    • G03G15/657—Feeding path after the transfer point and up to the fixing point, e.g. guides and feeding means for handling copy material carrying an unfused toner image
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
    • B65H5/222—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices
    • B65H5/224—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction belts
    • 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
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2007—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2401/00—Materials used for the handling apparatus or parts thereof; Properties thereof
    • B65H2401/10—Materials
    • B65H2401/14—Textiles, e.g. woven or knitted fabrics

Definitions

  • the invention relates to a digital printing or copying machine for one-sided or double-sided printing of a substrate using at least a toner according to the preamble of claim 1.
  • toner transferred for example, to paper
  • contactless working heaters and methods known for example with the help of heat / microwave radiation or with hot air the toner particles be melted.
  • the contacting and the non-contacting melting processes use, for example, toners whose glass transition temperature (T G ) is in a range from 45 ° C. to 75 ° C.
  • the glass transition temperature at which the toner - starting from the solid state - begins to soften can be influenced by the choice of raw materials and by the addition of certain additives to the toner.
  • a fixing device for the toner having at least one heating device, both the toner and the substrate itself are heated.
  • the surface temperature of the substrate must be in the range of the glass transition temperature of the toner or above.
  • the toner already reaches or exceeds the glass transition temperature (T G ) in the area of the heating device.
  • Printing and copying machines are known in which the substrate is double-sided is printed, whereby for printing on the front and back either one and the same imaging and transmission device and heating device or a separate imaging and transmission device, and each Heating device can be used.
  • This is used to fix the toner image Substrate often with the help of a conveyor belt on which the substrate rests the at least one image generation and transmission device and the associated one Heater passed by.
  • a first toner image transferred to a first substrate side and fixed thereon.
  • the Melting of the second toner image is therefore the first substrate side with the already fixed first toner image on the conveyor belt.
  • the disadvantage here is that during the melting of the second toner image the first toner image can heat up to the point that it becomes soft and to do so tends to stick to the conveyor belt. This can lead to several unwanted ones Effects lead: By sticking it can lead to a substrate jam at the Transfer of the substrate from the conveyor belt to a subsequent part of the Machine come. Furthermore, the appearance of the toner image can vary in the areas in which it is stuck to the conveyor belt. This leads to Image quality problems, for example, the toner image is uneven Shine on. These undesirable effects are reinforced by a pressurization with a heating roller when touching fixing the Toner.
  • Conveyor belts which are designed as a suction belt, ie one Have a number of through openings to which vacuum can be applied the substrate can be sucked in and is thereby held.
  • the famous suction belt has the same disadvantages as a conveyor belt with a closed Support surface.
  • a digital printing or copying machine having the features of claim 1. It includes at least a fixing device for fixing toner image transferred to a substrate serves.
  • the toner image can be single or multi-colored.
  • the present invention also includes at least one "toner image” understood a coating having a toner layer.
  • the substrate be an arc or a continuous path, for example made of Paper or cardboard. To fix the preferably dry toner on this becomes the substrate on a heating device, which is part of the fixing device is passed by.
  • the invention Printing and or copying machine is characterized in that the Mesh belt, preferably in the manner of a close-meshed sieve or Network, is formed. If the substrate is printed on both sides and on a first toner image is already fixed on a first substrate side, the substrate lies with its underside having the already fixed first toner image on the Sieve or mesh on, while a second toner image melted on the substrate top becomes.
  • the first toner image may melt when the second one melts Possibly heat the toner image to such an extent that it may become soft or pasty, but does not become liquid. Because of the negative pressure of the sieve or net, the substrate is attracted to the sieve or net, so that the surface structure of the sieve or mesh is reflected in the soft virtually imprints the first toner image.
  • the fact that the through openings and the Bridges between the through openings according to the invention are or are so small have such a small width is the change in the surface structure the first toner image as a result of the screen structure being pressed in is only so small that it is preferred by a viewer with the naked eye not, but at least hardly recognizable.
  • the suction belt can also be used for safe, wrinkle-free guidance the substrate, especially at high transport speeds, are guaranteed, especially if the transport route before, through and after the heating device in several independently drivable transport sections is divided, in each of which the subsequent transport section is somewhat driven faster than the previous transport section and others, organs driving the substrate, e.g. a touching heating roller, something leads.
  • a resulting, slowed relative speed of the substrate compared to the suction belt is due to the structure of the invention harmless, in particular if, as provided for in a development of the invention, the suction tape is designed as a wide, endless and seamless fabric tape is that with a particular advantage a homogeneous temperature distribution in the Area of the entire substrate and a constant structure of the suction belt guaranteed in this area.
  • the total cross-sectional flow area the through openings are larger, preferably significantly larger, than the total area of the webs between the through openings. Thereby it is ensured that the majority of the area of the second toner image does not Has contact with the suction belt and is therefore completely unaffected by it.
  • the through openings of the sieve or net preferably have one Diameter that is less than 1.0 mm. The smallest diameter of the through openings can be a few micrometers.
  • the soft first toner image does not stick to the release material, so that the substrate can be safely separated from the suction belt.
  • a Teflon coating can be used for the release material.
  • the suction belt can be used with a thin layer of a "release agent", for example silicone oil.
  • the entire suction belt can of course also be used be made from the material having a low surface energy.
  • an embodiment of the machine is preferred in which at least a cooling device for cooling the suction belt is provided.
  • the suction belt is cooled to the extent that the Suction belt coming into contact first toner image that is on the bottom of the Substrate is located during the melting of the substrate top located second toner image is not melted again.
  • Preferably so much heat is extracted from the first toner image via the cooled suction belt, that the toner layer of the first toner image does not become soft. This leaves the Image quality of the first toner image is completely unaffected by the fixing process of the second toner image.
  • the cooling device is on the opposite side of the substrate Side of the suction belt arranged - in the substrate transport direction seen - in front of the fixing device or within the fixing device.
  • the cooling device can thus, for example, be opposite the heating device be arranged so that the suction belt directly at the point in the fixing device is cooled, on which the second toner image is melted becomes.
  • the substrate flat side of the suction belt coming into contact a defined, depending a desired gloss of the fixed toner selected surface roughness having.
  • the surface structure of the suction belt which is due to excessive heating of the toner image imprinted on it determines the gloss of the toner image.
  • the smoother the surface of the suction belt the smoother it is also the surface of the toner image sucked onto the suction belt and so on higher its gloss.
  • the surface structure is embossed of the suction belt in the already fixed toner image is just desired, so that a defined, uniform and, above all, simple way reproducible gloss is adjustable. This can control the melting process at least for the first toner image.
  • the suction belt instead be equipped with an antistatic element to prevent the Avoid substrates and favor delivery and handover.
  • the suction belt according to the invention can, for example, be made of coated metal, coated polyamide or Teflon.
  • the suction belt coating or the material from which the suction tape is made is preferably wear-resistant and has only a low surface energy.
  • a "release agent" for example silicone oil applied.
  • This is used to set a defined surface roughness of the suction belt for example, sandblasted or impact deformed.
  • An embodiment of the machine can provide that the heating device has at least one microwave resonator through which the suction belt is guided is.
  • the microwave resonator applies this to the suction belt flat-lying substrate with microwave radiation, which means that on the Top of the substrate located toner image is melted.
  • the Suction belt can guide the substrate exactly along the transport path be guaranteed.
  • the front of the substrate - depending on the view - can form both the top and the bottom, that is, the first toner image can be on the front or back of the substrate. The same applies accordingly to the second toner image.
  • the suction belt essentially consists of a fabric, whereby "tissue” is to be understood in general and in a broad sense and in particular also includes, for example, knitted goods or the like and not just one woven goods. It is advantageous that the suction belt comprises a fabric, which extends uniformly across the entire width and is therefore uniform Forms a base for the entire substrate.
  • the fabric of the suction belt is preferably endless and seamless as a closed one Loop made, for example, as a section of a seamless one Hose or stocking.
  • the fabric can preferably consist of polyester and, for example, an antistatic element and / or comprise a stiffening element, both in the form of a Yarn or melt thread more or less incorporated into the fabric could be.
  • a stiffening element in the transverse and / or longitudinal direction of the suction belt.
  • a further development of the invention provides that at least one guide element is arranged on the suction belt, preferably two parallel to each other running guide ribs along the underside of the suction belt are in with guide grooves in a drive shaft of the suction belt Stand in engagement and the suction belt slips in the transverse direction, i.e. in Prevent axial direction of the drive shaft.
  • the guide ribs can, for example consist of a rubber-like, bendable material, so that the Bends of the suction belt can follow like a belt.
  • FIG. 1 shows in schematic representation of a detail from the first embodiment a digital printing or copying machine 1, namely a fixing device 3, the for fixing a toner on a substrate 11, for example paper sheets, serves.
  • the fixing device 3 has a heating device, which here is a first Microwave resonator 5 and a second microwave resonator 7 are formed.
  • the microwave resonators 5, 7 are - in the transport direction 9 of the substrate 11 seen - arranged a short distance apart.
  • the construction and the function of the microwave resonators 5, 7 is basically known, so that in the following is only briefly discussed.
  • the microwave resonators 5, 7 each have a slot-shaped opening 13 and 15 through which the transport path of the substrate 11 runs. Inside the openings 13, 15 the substrate 11 is exposed to microwave radiation, causing a on the substrate top transferred toner image is melted and with the Substrate 11 connects.
  • a transport device 17 Around the substrate 11 along the transport path through the microwave resonators 5, 7 to pass through, a transport device 17 is provided, which at least A suction belt 19 has a number of through openings 21 is provided.
  • the suction belt 19 is, according to the invention, of a close-meshed Sieve formed. This preferably extends across the entire substrate width Extending suction belt 19 is designed here as an endless belt and via guide rollers 23, 25, 27 and 29 out.
  • the guide rollers 23, 25 are arranged that the intermediate suction belt section was intended to be parallel to each other Horizontal runs. As can be seen from the figure, the is between the Guide rollers 23 and 25 located suction belt section through the openings 13, 15 of the microwave resonators 5, 7 out.
  • a magnetron 31, which is used for supply, is arranged in the interior of the suction belt loop the microwave resonators 5, 7 are used with microwave radiation.
  • Further suction boxes 33 and 35 are provided, which the microwave resonators 5, 7 - in Seen substrate transport direction - are upstream or downstream.
  • the Suction boxes 33, 35 which extend over the entire width of the suction belt 19 can, are connected to a vacuum source, not shown, by means of which via the through openings 21 in the suction belt 19 air between the substrate 11 and the suction belt 19 can be sucked off, as indicated by arrows 37. As a result, the substrate 11 is held securely on the suction belt 19.
  • each of the microwave resonators 5, 7 a suction box 39 is integrated, which consists of one in the bottom of the transport path of the substrate 11 part of the microwave resonator arranged vacuum chamber 41, which is used to vacuum the between the guide rollers 23, 25 lying suction tape section has an opening.
  • the opening is by means of a perforated plate 43, which consists for example of Teflon, covered.
  • the vacuum chambers 41 are connected to one another via a connecting channel 45 and via a common connecting duct 47 with a blower 49 connected to apply pressure to the vacuum chambers 41.
  • the substrate 11 is one of the fixing device 3 upstream part of the machine 1 transferred to the suction belt 19 and flat on the suction belt section located between the guide rollers 23, 25 hung up as shown in the figure.
  • the toner image to be fixed is on the substrate top 51.
  • Substrate 11 is fixed.
  • the substrate 11 is successively through the slit-shaped openings 13, 15 of the microwave resonators 5, 7 guided and with microwave radiation acts, whereby the toner image located on the substrate top 51 is melted and fixed.
  • the substrate 11 is sucked onto the suction belt 19. After the substrate 11 the Has left the effective range of the microwave resonators 5, 7, it will be in the range the guide roller 25 separated from the suction belt 19 and to a subsequent one Part of machine 1 transferred.
  • the suction of the between the guide rollers 23, 25 located suction belt section is also used for stabilization of the suction belt 19.
  • the fixing device 3 described in Figure 1 is characterized by a compact Building on.
  • the heating device for melting the toner image only comprises a microwave resonator.
  • a heating device Radiation device are used, which the toner image with electromagnetic Radiation, for example in the UV range and / or infrared range.
  • the toner image can also be used with hot air or Steam is applied to melt it.
  • the Heating device for example at least one heatable heating roller or roller which mechanically contacts the toner image to melt it.
  • the suction belt 19 is not shown Cooling device is assigned, which serves to cool the conveyor belt.
  • the Cooling device can for example be arranged inside the suction belt loop be and the suction belt, for example, in its return area cool between rollers 25, 27, 29 and 23.
  • the toner mentioned in connection with the present invention can be a liquid or dry toner.
  • the transport device 17 described with reference to the figures can be both the Feeding the substrate to the heater also serve to substrate to pass the heating device and for further transport of the substrate to a subsequent part of the printing or copying machine 1.
  • the transport device 17 alternatively only the feed of the substrate can serve for the heating device, for this purpose the at least a suction belt of the transport device in front of the heater to the The beginning of the transfer line is returned.
  • the transport device only the substrate past the heater, feeding the substrate and its further transport from the heating device to a subsequent part the machine is carried out with the help of at least one further transport device.
  • the transport device 17 exclusively for the further transport of the substrate from the heating device to a subsequent part of the machine.
  • the at least one transport device 17 can also be configured such that with the aid of which the substrate 11 is fed to the heating device, on the heating device passed over and / or transported further by the heating device.
  • a suction belt in a microwave heating device 19 it would be possible to use a suction belt in a microwave heating device 19 according to the embodiment of Figure 1 to use To transport substrate through the heater, while for example Transport and to bridge the path between the toner inking units or a transport section according to the actual printing units and the heating device of the embodiment of Figures 2 and 3 are taken could.
  • FIGS 2 and 3 show a extending over a transport section Transport device 17 with lateral housing parts 55.
  • the suction belt 19 is a mesh fabric with tight Through openings 21 are formed.
  • the suction belt 19 is by means of a drive shaft 57 driven and tensioned by means of a tension shaft 59. It runs endlessly and seamlessly around these waves 57, 59 um.
  • the drive shaft 57 is by means of a motor 61 driven. To guide it on the drive shaft 57 points the suction tape 19 has raised guide ribs running along its underside of the edges 63 on the guide grooves of the drive shaft, not shown 57 are engaged.
  • the completion of the transport device 17 in the transport direction 9 forms an outlet plate 65 for the delivery or transfer of the transported Substrate 11.
EP01127779A 2000-12-22 2001-11-22 Machine d'impression ou copier numérique Expired - Lifetime EP1217454B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10064556 2000-12-22
DE10064556 2000-12-22
DE10113885 2001-03-21
DE10113885A DE10113885A1 (de) 2000-12-22 2001-03-21 Digitale Druck- oder Kopiermaschine

Publications (3)

Publication Number Publication Date
EP1217454A2 true EP1217454A2 (fr) 2002-06-26
EP1217454A3 EP1217454A3 (fr) 2004-11-24
EP1217454B1 EP1217454B1 (fr) 2006-09-13

Family

ID=26008052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01127779A Expired - Lifetime EP1217454B1 (fr) 2000-12-22 2001-11-22 Machine d'impression ou copier numérique

Country Status (5)

Country Link
US (1) US6993278B2 (fr)
EP (1) EP1217454B1 (fr)
JP (1) JP2002287544A (fr)
AT (1) ATE339712T1 (fr)
DE (1) DE50110999D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006052677A1 (de) * 2006-11-07 2008-05-08 Windmöller & Hölscher Kg Druckmaschine sowie Verfahren zum Betrieb derselben
EP2852252A1 (fr) * 2004-08-19 2015-03-25 Analyses Mesures Pollutions (A.M.P) Procédé et dispositif pour le traitement thermique d'un matériau souple

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DE10256327A1 (de) * 2002-11-27 2004-06-09 Thieme Gmbh & Co. Kg Siebdruckmschine
EP1467191B1 (fr) * 2003-04-08 2006-06-28 TEWS ELEKTRONIK Dipl.-Ing. Manfred Tews Procédé et dispositif pour la détermination de la masse des portions d'un agent actif
US20050116034A1 (en) * 2003-11-28 2005-06-02 Masato Satake Printing system
JP4681854B2 (ja) * 2004-11-12 2011-05-11 キヤノン株式会社 封止部材、トナー補給容器及び画像形成装置
DE102007024945A1 (de) * 2006-06-06 2007-12-13 Eastman Kodak Co. Verfahren und Vorrichtung zum Transport eines Bogens in einer Druckmaschine
WO2010008390A1 (fr) * 2008-07-17 2010-01-21 Hewlett-Packard Development Company, L.P. Ventouses pour imprimantes à base d'encre
US8378263B2 (en) * 2008-10-13 2013-02-19 Palo Alto Research Center Incorporated Hybrid multi-zone fusing
JP5505197B2 (ja) * 2010-08-25 2014-05-28 コニカミノルタ株式会社 光沢付与装置、画像形成装置及び後処理装置並びに画像形成システム
MY166194A (en) * 2010-09-24 2018-06-07 Sicpa Holding Sa Device, system and method for producing a magnetically induced visual effect
EP2684821B1 (fr) 2011-03-05 2015-09-02 Sanwa Techno Co., Ltd Courroie de transport à grande vitesse à base de tissu et appareil utilisant celle-ci
WO2013172825A1 (fr) * 2012-05-16 2013-11-21 Otis Elevator Company Poulie à gorge pour système d'ascenseur
DE102013002122A1 (de) * 2013-02-08 2014-08-14 Jörg Scheffler Transportvorrichtung für Papier und Papierbearbeitungseinrichtung
US11446750B2 (en) 2020-02-03 2022-09-20 Io Tech Group Ltd. Systems for printing solder paste and other viscous materials at high resolution
US11497124B2 (en) 2020-06-09 2022-11-08 Io Tech Group Ltd. Methods for printing conformal materials on component edges at high resolution
US11691332B2 (en) * 2020-08-05 2023-07-04 Io Tech Group Ltd. Systems and methods for 3D printing with vacuum assisted laser printing machine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2852252A1 (fr) * 2004-08-19 2015-03-25 Analyses Mesures Pollutions (A.M.P) Procédé et dispositif pour le traitement thermique d'un matériau souple
DE102006052677A1 (de) * 2006-11-07 2008-05-08 Windmöller & Hölscher Kg Druckmaschine sowie Verfahren zum Betrieb derselben

Also Published As

Publication number Publication date
US20020139264A1 (en) 2002-10-03
EP1217454A3 (fr) 2004-11-24
EP1217454B1 (fr) 2006-09-13
US6993278B2 (en) 2006-01-31
ATE339712T1 (de) 2006-10-15
JP2002287544A (ja) 2002-10-03
DE50110999D1 (de) 2006-10-26

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