EP0710553B1 - Transfer-Druckmaschine - Google Patents

Transfer-Druckmaschine Download PDF

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Publication number
EP0710553B1
EP0710553B1 EP19950307666 EP95307666A EP0710553B1 EP 0710553 B1 EP0710553 B1 EP 0710553B1 EP 19950307666 EP19950307666 EP 19950307666 EP 95307666 A EP95307666 A EP 95307666A EP 0710553 B1 EP0710553 B1 EP 0710553B1
Authority
EP
European Patent Office
Prior art keywords
printing
ink
stencil
drum
press
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.)
Expired - Lifetime
Application number
EP19950307666
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English (en)
French (fr)
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EP0710553A3 (de
EP0710553A2 (de
Inventor
Sadanao c/o Riso Kagaku Corporation Okuda
Takahito c/o Riso Kagaku Corporation Tojima
Takashi c/o Riso Kagaku Corporation Isozaki
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.)
Riso Kagaku Corp
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Riso Kagaku 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
Priority claimed from JP6265745A external-priority patent/JPH08118587A/ja
Priority claimed from JP6285158A external-priority patent/JPH08142302A/ja
Application filed by Riso Kagaku Corp filed Critical Riso Kagaku Corp
Publication of EP0710553A2 publication Critical patent/EP0710553A2/de
Publication of EP0710553A3 publication Critical patent/EP0710553A3/xx
Application granted granted Critical
Publication of EP0710553B1 publication Critical patent/EP0710553B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F16/00—Transfer printing apparatus

Definitions

  • the present invention relates to a printing machine such as a lithographic printing machine or a stencil printing machine, and particularly to a printing machine which has a size being small enough to be easily installed at a narrow location and which suppresses inconveniences such as set-off, bleeding, and strike-through generated in a printed matter.
  • a document image reading-out unit 5 has an image scanner 3 for reading-out an image of a document to be printed.
  • a perforating unit 9 has a perforating device 7 for forming a perforated image on a stencil sheet S in accordance with document image data read out by the document reading-out unit 5.
  • the stencil sheet S thus perforated at the perforating unit 9 is wound around the outer peripheral surface of a stencil drum 13.
  • An ink feeder 11 is provided in the stencil drum 13 for feeding ink on the inner peripheral surface of the stencil drum 13.
  • a vertically movable press roller 23 is provided under the stencil drum 13.
  • a paper P to be printed is supplied between the stencil drum 13 and the press roller 23.
  • the press roller 23 carries the paper P while holding it between the stencil drum 13 and the press roller 23, to form an image on the paper P.
  • Papers P on a feed board 25 are fed by a jogger roller 27 one by one, and each paper P is fed between the press roller 23 and the stencil drum 13.
  • the paper P after being printed is separated from the stencil drum 13 by a separating claw 37, and is delivered onto a delivery board 33 through a carrier 31 having a belt conveyor mechanism.
  • the stencil sheet S is separated from the stencil drum 13 and is discarded by a stencil discarding unit 35.
  • printing is performed by holding a paper P to be printed between the stencil sheet S of the stencil drum 13 and the press roller 23 and directly transferring ink from the stencil drum 13 to the paper P.
  • the amount of ink transferred to the paper is varied depending on a surface smoothness and an ink absorbing property of a paper to be printed. Consequently, there arises a problem that a uniform image is difficult to be formed on the paper.
  • a printing image formed on the paper is sometimes raised due to spinnability of ink as shown in Fig. 8.
  • the above-described stencil-direct printing machine has a structure in which a paper P after being printed is separated from the stencil drum 13 using the separating claw 37.
  • the separating claw 37 cannot be brought in contact with the stencil drum 13.
  • the paper P after being printed cannot be certainly separated from the peripheral surface of the stencil drum 13, and in some cases, the paper P whirls up in the state being stuck on the peripheral surface of the rotating stencil drum 13.
  • the separating claw 37 is brought in contact with a printing image surface of the paper P, particularly, in contact with a printing image surface having a large area of a solid portion of the paper P, a contact trace of the separating claw 37 is liable to remain on the printing image surface. As a result, there occurs a problem that the paper P is difficult to strictly ensure a printing image corresponding to that of a document.
  • a transfer drum 15 is provided under a stencil drum 13.
  • the transfer drum 15 is the same as the stencil drum 13 in outside diameter and rotational speed.
  • the transfer drum 15 is brought in contact with the stencil drum 13.
  • a press roller 23 impresses a paper P to be printed against the transfer drum 15, so that the stencil image of ink on the transfer drum 15 is transferred on the paper P.
  • the paper P is thus printed.
  • the transfer drum is set to be equal in size (outside diameter) and in rotating speed to the stencil drum.
  • the size of the entire printing machine is enlarged, leading to another problem in that the printing machine cannot be miniaturized.
  • the transfer drum is equal in rotational speed to the stencil drum, and accordingly, upon continuous printing, the same printing image is transferred at the same position on the transfer drum every time.
  • This is advantageous in eliminating the necessity of cleaning the peripheral surface of the transfer drum for every rotation of the transfer drum and in only removing ink remaining on the peripheral surface of the transfer drum after completion of printing.
  • the transfer drum is generally formed of a rubber member being difficult to be cleaned, and thereby a large scale of an ink removing device is necessary for removing and cleaning an excessive ink on the transfer drum. Consequently, there occurs a new problem that the printing machine is enlarged in size by the presence of the ink removing device.
  • ink transferred on a paper to be printed is dried by means of heat or hot air using a halogen lamp, heater, heat roller or the like.
  • a large sized drier is required for perfectly drying ink transferred on a paper to be printed, and the printing machine is further enlarged in size by mounting such a large size drier.
  • the direct-printing method when a hard paper is printed, there is a fear that the durability (printing resistance) of a press-plate (stencil, in the case of stencil printing) is deteriorated. Moreover, in this method, since an impression force applied from an press roller to a press-plate drum (stencil drum, in the case of stencil printing) is increased for directly transferring ink onto the paper, resulting in the increased noise. In view of these problems, the indirect-printing method seems to be more effective; however, as described, the indirect-printing method has the disadvantage that the size is enlarged by provision of a transfer drum. In other words, the indirect-printing method is required to solve such a disadvantage in order to be adopted as an effective printing means.
  • An object of the present invention is to provide an indirect printing machine capable of obtaining a printed matter being less in set-off, bleeding and strike-through, being excellent in durability and noise reduction of a press-plate, and also being reduced in size and excellent in handling.
  • JP-A-4-59 384 and EP-A-581 606 disclose a transfer printing machine according to the preamble of claim 1.
  • the present invention is characterized by the features of the characterizing portion of claim 1.
  • the transfer printing machine may be provided with a transfer body which comprises:
  • a transfer printing machine defined in the invention described in the second aspect, further comprising an excessive ink removing means for removing excessive part of printing ink transferred from the press-plate drum to the endless belt of the transfer body, the excessive part of printing ink being not transferred on the matter to be printed and remaining on the endless belt.
  • the excessive ink removing means may comprise :
  • Such an endless belt of the transfer body may be made of a material having a repellency against the printing ink.
  • the press-plate may be one kind selected from a group consisting of an intaglio, a letterpress, a lithography, and a stencil.
  • the transfer body may comprise a transfer drum which is rotated at a rotational speed different from that of the press-plate drum in the state being in contact with the press-plate drum for receiving an image of printing ink on the outer peripheral surface from the press-plate of the press-plate drum.
  • the excessive ink removing means may comprise :
  • At least the outer peripheral surface of the transfer drum is made of a material having a repellency against the printing ink and, again, the press-plate may be one kind selected from a group consisting of an intaglio, a letterpress, a lithography, and a stencil.
  • the transfer printing machine may further comprise a press-plate making unit for making a positive press-plate.
  • a press-plate provided on a press-plate drum of the printing machine of the present invention either of an intaglio, a letterpress, a lithography, and a stencil can be used.
  • a line image portion and a non-line image portion, which constitute a stencil image, are formed on the press-plate.
  • the stencil image of ink formed on the press-plate drum is transferred on a transfer body rotated in the state being in contact with the press-plate drum, before being transferred on a matter to be printed.
  • a matter to be printed is fed between the transfer body transferred with ink and an press roller, and is carried while being held between the transfer body and the press roller.
  • the ink on the transfer body is applied with a pressure by the press roller, and is transferred on the matter to be printed which is pressed on the transfer body.
  • a printing image is thus formed on the matter to be printed.
  • the rotational speed of the transfer body is different from that of the press-plate drum, and thereby a printing image transferred on the transfer body is varied in position for each rotation.
  • excessive ink not transferred on the matter to be printed is removed from the transfer body by an excessive ink removing means.
  • An excessive ink removing liquid is applied on the transfer body at a specified portion stuck with ink by a coating means of the excessive ink removing means.
  • the remaining part of the ink on the transfer body after printing on the matter to be printed is thus perfectly collected by a cleaning means, to be recovered in a containing unit.
  • At least a portion, being contact with ink, of the transfer body may be formed of a material having a repellency against ink for accelerating the removal of ink remaining on the transfer body by the ink removing means.
  • Fig. 1 is a view of a first embodiment of a transfer printing machine of the present invention.
  • This machine is of a stencil printing type, and therefore, parts corresponding to those in the prior art stencil printing machine shown in Fig. 7 are designated by the same characters.
  • the stencil printing machine in this embodiment includes: a document image reading-out unit 5 having an image scanner 3 for reading-out an image of a document to be printed; a perforating unit 8 having a perforating device 7 for copying a perforated image on a stencil sheet S in accordance with image data read out by the document reading-out unit 5; and a stencil drum 13 containing an ink feeder 11 and mounting the stencil sheet S perforated by the perforating unit 9 in such a manner that the stencil sheet S is wound around the outer peripheral surface.
  • a press-plate formed with an image and wound around a press-plate drum is represented by the stencil in this embodiment; however, it may be further selected from a group consisting of an intaglio, a letterpress, and a lithography.
  • a line image portion and a non-line image portion for forming a press-plate image corresponding to an image of a document are formed.
  • a transfer body 15 is provided, to which printing ink is transferred from the stencil drum 13 before printing a paper to be printed.
  • the transfer body 15 is provided with a cleaning unit 17 for cleaning the transfer body 15.
  • a recover dish 19 is provided for recovering the excessive part of printing ink collected by the cleaning unit 17.
  • An excessive ink removing liquid is applied on the transfer body 15 by a coater 21.
  • a press roller 23 is provided at a position facing to the transfer body 15 for impressing the transfer body 15.
  • Papers P to be printed are fed from a feed board 25, and are jogged one by one by a jogger roller 27. The paper P is then fed between the transfer body 15 and the press roller 23 by a paper feed timing roller 29. The paper P is printed and is delivered onto a delivery board 33 by a delivering carrier 31 having a belt conveyor mechanism.
  • the stencil sheet S is separated from the stencil drum 13, to be discarded by a stencil discarding unit 35.
  • the stencil sheet S is formed with a positive image relative to an image of a document by the perforating unit 9.
  • the stencil sheet S is mounted around the stencil drum 13, and is shifted to the printing action.
  • the stencil drum 13 is rotated around its center axis clockwise in the figure by means of a rotating means (not shown), and the transfer body 15 being in contact with the stencil drum 13 is rotated counterclockwise.
  • the paper feed timing roller 29 feeds the paper P between the transfer body 15 and the press roller 23 at a predetermined timing synchronized with the rotation of the transfer body 15 (in the figure, the paper P is fed from the left to the right).
  • the press roller 23 presses the paper P on the transfer body 15.
  • a reversed printing image formed on the transfer body 15 is transferred on the paper P. The stencil printing is thus performed.
  • the paper P thus printed is fed to the delivery board 33 by means of the delivering carrier 31 in such a manner that the surface having the positive printing image is directed upward.
  • Fig. 2 is an enlarged view of the transfer body of the printing machine.
  • the transfer body 15 includes a plurality of rollers 43a, 43b, and an endless belt 42 hung between the rollers 43a, 43a.
  • the rollers 43a, 43a, each having a diameter smaller than that of the stencil drum 13, are disposed substantially in the horizontal direction in such a manner as to be spaced from each other at a specified interval.
  • the endless belt 42 extends substantially in the horizontal direction where the rollers 43a, 43a are disposed, so that the vertical size of the printing machine can be reduced.
  • a printing ink K transferred on the endless belt 42 from the stencil drum 13 is transferred on the paper P which is fed at a specified speed between the transfer body 15 and the press roller 23 by the paper feed timing roller 29.
  • the feed speed of the paper P by the paper feed timing roller 29 corresponds to the carrying speed of the endless belt 42.
  • the rotational speed of the rollers 43a, 43a is higher than that of the stencil drum 13.
  • Such a relationship of the rotational speed is determined by the length of the endless belt 42 relative to the peripheral length of the stencil drum 13. As the length of the endless belt 42 comes near the peripheral length of the stencil drum 13, the rotational speed of the endless belt 42 comes near that of the stencil drum 13.
  • the endless belt 42 constituting the transfer body 15 may be suitably changed in length and arrangement, other than the case shown in the figure, by disposing a plurality of the rollers 43a, 43a in different empty spaces of the printing machine, thus miniaturizing the printing machine.
  • the rotational speed of the endless belt 42 is different from that of the stencil drum 13, so that after the printing ink K is transferred on the paper P, excessive part Kn of printing ink not transferred on the paper P must be perfectly removed. This is because, at the second rotation of the endless belt 42, a printing image is formed on the endless belt 42 at a position different from that of the printing image formed at the first rotation of the endless belt 42.
  • the excessive part Kn of printing ink not transferred on the paper P is perfectly scraped by a cleaning member 17 of an excessive ink removing means 30 slidably contacted with part of the endless belt 42.
  • the excessive part Kn of printing ink scraped by the cleaning member 17 is collected in a containing unit 19 disposed under the cleaning member 17.
  • an excessive ink removing liquid may be applied on the endless belt 42 of the transfer body 15.
  • Such a cleaning member 17 may be formed in a blade-like shape.
  • the excessive part Kn of printing ink is small, it may be formed of non-woven fabric, woven fabric or an ink absorbing paper.
  • the coater 21 for coating the endless belt 42 with the excessive ink removing liquid may be mounted at a position rearward of the cleaning member 17 relative to the rotational direction of the endless belt 42.
  • the liquid amount is not automatically controlled, it may be controlled by the cleaning member 17, and accordingly, the coater 21 can be mounted forward of the cleaning member 17.
  • the excessive ink removing liquid has a property being insoluble to a printing ink K used for the printing machine and being lower in surface tension than the printing ink K.
  • Specific examples of the excessive ink removing liquids include a dimethyl silicone oil; modified silicone oils modified by phenyl, polyether, fluorine, amino, epoxy, carboxyl, carbinol, methacryl, mercapto and phenol groups; and a water solution added with a surface active agent, an organic solvent and the like.
  • the surface active agent to be added to water may be selected from anion, cation and ampholytic surface active agents, and a nonionic surface active agent.
  • the organic solvent to be added to water is required to be soluble to water.
  • Specific examples of the organic solvents include methanol, ethanol, isopropyl alcohol, n-propyl alcohol, ethylene glycol and glycerol.
  • the surface layer of the endless belt 42 constituting the transfer body shown in Fig. 2 is made of a material having a repellency against a printing ink K used for the printing machine.
  • the above ink-repellent material may be suitably selected from tetrafluoroethylene (PTFT), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkylvinylether copolymer (PFA) and the like.
  • PTFT tetrafluoroethylene
  • FEP tetrafluoroethylene-hexafluoropropylene copolymer
  • PFA tetrafluoroethylene-perfluoroalkylvinylether copolymer
  • the thickness of the surface layer of the endless belt 42 may be suitably thinned for making the best use of the property of an elastic member constituting the inner layer of the endless belt 42.
  • the inner layer is made of a rubber material as an elastic material and/or a metal material.
  • the endless belt 42 of the transfer body 15 is formed, as described above, of the material having a uniform surface smoothness and an excellent ink absorbing property, the printing ink K is allowed to remain on the surface of the endless belt 42 without excessive spinnability.
  • the paper P to be printed is impressed on the endless belt 42 using the press roller 23 so that the printing ink K on the surface of the endless belt 42 is transferred on the paper P.
  • the press roller 23 is made of a non-elastic material.
  • the press roller 23 is made of an elastic material.
  • the transfer body 15 or the press roller 23 is made of an elastic material and the other is made of a non-elastic material, when the press roller 23 impresses the paper P onto the transfer body 15, the elastic body side is deformed against the non-elastic body side at a specified elastic modulus. As a result, the printing ink K is impressed in the paper P to be printed, and thereby it is prevented from being raised from the surface of the paper P.
  • the paper P thus printed can be delivered without the separating claw which has been used in the prior art printing machine.
  • the rotational speed of the endless belt 42 of the transfer body 15 is changeable to be increased (in the case where the diameter of the transfer body 15 is smaller than that of the stencil drum 13), the paper P is allowed to go straight ahead along the carrying direction without the separating claw. As a result, the paper P can be delivered in the direction of the delivery board 33 in the state not stuck on the transfer body 15.
  • the printing may be performed in the state that the separating claw is brought in contact with the endless belt 42 of the transfer body 15.
  • the various printing characteristics of the stencil printing machine of the present invention will be evaluated as compared with the prior art stencil printing machine shown in Fig. 7.
  • the printing characteristics evaluated here include step-off of a paper after being printed; fixing, bleeding, and strike-through of a printing ink at the time when a paper after being printed is delivered to the delivery board 33; durability (printing resistance) of a stencil; and noise generated during printing.
  • the evaluated results are shown in Fig. 3.
  • a document image reading-out unit 5 has an image scanner 3 for reading-out an image of a document to be printed.
  • a perforating unit 9 has a perforating device 7 for forming a perforated image on a stencil sheet S in accordance with document image data read-out by the document reading-out unit 5.
  • a stencil drum 13 has a peripheral wall allowing ink to flow therethrough, and it is rotated around its center axis clockwise in the figure by a rotating means (not shown).
  • a holding means for holding the leading end of the stencil sheet S is provided on the outer peripheral surface of the stencil drum 13.
  • the stencil drum 13 contains an ink feeder 11.
  • the stencil sheet S already processed by the perforating device 7 is held by the holding means and then the stencil drum 13 is rotated clockwise in Fig. 4, the stencil sheet S functioning as the printing plate is wound around the outer peripheral surface of the stencil drum 13. Subsequently, the ink feeder 11 feeds ink on the inner peripheral surface of the stencil drum 13, to form a stencil image on the surface of the stencil drum 13.
  • a transfer drum 15a is provided under the stencil drum 13.
  • the transfer drum 15a is rotated counterclockwise in Fig. 4 in the state being in contact with the stencil drum 13, and thereby the stencil image formed on the stencil drum 13 is temporarily transferred on the transfer drum 15a.
  • the transfer drum 15a is smaller in diameter than the stencil drum 13 and is rotated at a rotational speed different from that of the stencil drum 13.
  • At least the surface layer of the transfer drum 15a is smoothly formed of a material having a repellency against a printing ink used for the printing machine.
  • the above ink-repellent material may be suitably selected from tetrafluoroethylene (PTFT), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkylvinylether copolymer (PFA), silicon rubber and the like.
  • the transfer of ink from the transfer drum 15a to the paper P to be printed can be smoothly performed, and the ink remaining on the surface of the transfer drum 15a after transfer of ink can be easily performed.
  • the transfer drum 15a in this embodiment is composed of an inner layer made of a rubber material as an elastic material and/or a metal material, and the surface layer made of the ink-repellent material.
  • the surface layer is preferably thinned for making the best use of the elastic material constituting the inner layer.
  • a vertically movable press roller 23 is provided under the transfer drum 15a.
  • a paper P to be printed is fed between the transfer drum 15a and the press roller 23.
  • the press roller 23 carries the paper P thus fed while holding it between the transfer drum 15a and the press roller 23, to form a printing image on the paper P.
  • Papers P on a feed board 25 are fed one by one by a jogger 27, and the paper P is fed between the press roller 23 and the transfer drum 15a by a paper feed timing roller 29.
  • the paper P after being printed is separated from the transfer drum 15a, and is delivered to a delivery board 33 by a delivering carrier 31 having a belt conveyor mechanism.
  • the stencil sheet S is separated from the stencil drum 13 by a stencil discarding unit 35, to be discarded.
  • the press roller 23 is made of a non-elastic material. If the transfer drum 15a has a non-elasticity, the press roller is made of an elastic material.
  • the rotational speed of the transfer drum is different from that of the stencil drum, so that after the printing ink is transferred on the paper to be printed, excessive part of printing ink not transferred on the paper must be perfectly removed. This is because, at the second rotation of the transfer body, a printing image is formed on the transfer body at a position different from that of the printing image formed at the first rotation of transfer body.
  • an ink removing means 30 is provided in such a manner as to be adjacent to the transfer drum 15a on the right side, that is, on the side where the paper P already printed is delivered. Of the ink transferred from the stencil drum 13 to the transfer drum 15a, excessive part thereof not transferred to the paper P to be printed and reaming on the transfer body 15a is removed by the ink removing means 30.
  • the ink removing means 30 has a cleaning member 17 for collecting excessive ink remaining on the peripheral surface of the transfer body 15a.
  • the cleaning member 17 is disposed rearward of the press roller 23 relative to the rotational direction of the transfer body 15a.
  • the ink removing means 30 also has a containing unit 19 and a coater 21.
  • the containing unit 19 is adapted to contain excessive ink collected by the cleaning member 17.
  • the coater 21 is adapted to feed an excessive ink removing liquid on the surface of the transfer body 15a for effectively removing excessive ink.
  • the cleaning member 17 in this embodiment is formed in a blade-like shape being contact with the peripheral surface of the transfer drum 15a.
  • the cleaning member 17 may be made of non-woven fabric, woven fabric or ink absorbing paper.
  • the coater 21 in this embodiment is provided in such a manner as to be adjacent to the rear portion of the cleaning member relative to the rotational direction of the transfer drum 15a.
  • the coater 21 automatically controls the amount of an excessive ink removing liquid and feeds it on the peripheral surface of the transfer drum 15a.
  • it may be mounted forward of the cleaning member 17 relative to the rotational direction of the transfer drum 15a. With this arrangement, the amount of the excessive ink removing liquid applied on the peripheral surface of the transfer drum 15a can be controlled by the cleaning member 17.
  • the excessive ink removing liquid is insoluble to ink used in the printing machine and is low in surface tension than the ink. Concretely, either of the materials described in the first embodiment can be used.
  • the stencil sheet S is perforated with a positive image by the perforating unit 9, and is mounted around the stencil drum 13.
  • the printing is thus started.
  • the stencil drum 13 is rotated clockwise.
  • the transfer drum 15a being contact with the stencil drum 13 is rotated counterclockwise at a rotational speed different from that of the stencil drum 13.
  • a paper P to be printed is carried between the transfer drum 15a and the press roller 23 by the paper feed timing roller 29 at a specified timing synchronized with the rotation of the transfer drum 15a.
  • ink 39 of a stencil image which is transferred from the stencil drum 13 to the transfer drum 15a, is transferred on the paper P by an impression force applied from the press roller 23.
  • the stencil printing machine in this embodiment does not have the separating claw for separating the paper from the stencil drum which has been used in the prior art printing machine.
  • the paper after being printed can be easily separated from the peripheral surface of the transfer drum 15a.
  • the paper P after being printed is fed to the delivery board 33 by the delivering carrier 31 in such a manner that the surface having the printing image is directed upward.
  • the separating claw may be provided.
  • the printing can performed in the state that the separating claw is brought in contact with the transfer drum 15a.
  • a trace of the separating claw is generated on the surface of the transfer drum; however, in this embodiment, the trace of the separating claw can be perfectly removed by the cleaning member 17 of the excessive ink removing means 30.
  • an excessive ink 41 not transferred on the paper P and remaining on the transfer drum 15a can be perfectly removed by the cleaning member 17 of the excessive ink removing means 30.
  • the excessive ink 41 is collected in the containing unit 19.
  • the excessive ink removing means 30 in this embodiment has the coater 21 for feeding an excessive ink removing liquid on the peripheral surface of the transfer drum 15a. Accordingly, the removal of the excessive ink 41 by the cleaning member 17 can be perfectly performed as compared with the case having no coater 21.
  • the amount of ink transferred from the stencil drum 13 to the paper P to be printed is varied depending on the surface smoothness and the ink absorbing property of the paper P. Moreover, a printing image formed on the paper P is raised by spinnability of ink used for stencil printing.
  • the surface layer of the transfer drum 15a is made of a material having a uniform surface smoothness and an ink-repellent property.
  • ink forming a stencil image on the stencil drum 13 is transferred from the stencil drum 13 onto the surface of the transfer drum 15a without excessive spinnability.
  • the ink is impressed onto the paper P by the press roller 23.
  • ink 39 present on the surface of the transfer drum 15a is forcibly impressed in the paper P by an impression force applied from the press roller 23, so that ink is not raised from the surface of the paper P.
  • the transfer drum 15a has no elasticity and the press roller 23 has an elasticity.
  • the various printing characteristics of the stencil printing machine in this embodiment will be evaluated as compared with the prior art stencil printing machine.
  • the printing characteristics evaluated here include step-off of a paper after being printed; fixing, bleeding, and strike-through of a printing ink at the time when a paper after being printed is delivered to the delivery board; durability (printing resistance) of a stencil; and noise generated during printing.
  • the evaluated results are shown in Fig. 6.
  • the transfer body can be miniaturized by setting the rotational speed of the transfer body to be higher than that of the press-plate drum.
  • This method is of a transfer printing type using a transfer body, and accordingly, it is effective to suppress the inconveniences such as set-off, bleeding and strike-through, to enhance the durability of a press-plate, and to reduce noise generated in the printing machine.
  • the transfer body can include an endless belt.
  • the endless belt can be freely changed in shape. As a result, the freedom in layout of the interior of the printing machine can be increased, thus reducing the size of the printing machine.
  • the transfer body can be constituted of a transfer drum.
  • the rotational speed of the transfer drum is set to be different from that of the press-plate drum, so that the diameter of the transfer drum can be made smaller than that of the press-plate drum, thus reducing the size of the printing machine.
  • An excessive ink removing means for removing excessive ink from the transfer body can be provided.
  • excessive ink on the transfer body is substantially perfectly removed from the transfer body, so that the printing quality can be improved.
  • the press-plate can be selected from a group consisting of an intaglio, a letterpress, a lithography, and a stencil, as needed.
  • a press-plate making unit for making a press-plate in a positive image can be incorporated in the printing machine.
  • the press-plate making and the printing can be simply and consistently performed, that is, the printing can be performed directly after press-plate making.

Claims (3)

  1. Transferdruckmaschine, aufweisend:
    Eine drehbare Preßplattentrommel (13), im Innern umfassend eine Drucktintenzuführeinrichtung (11) zum Zuführen von Tinte, und dazu ausgelegt, eine Preßplatte (S) auf ihrer Außenfläche aufzunehmen,
    ein Transferelement (15) mit einer Außenfläche, wobei das Transferelement (15) unter einer Bedingung drehbar ist, daß die Außenflächen der Preßplattentrommel (13) und des Transferelements (15) einander kontaktieren, wobei die Außenfläche des Transferelements (15), welches die Außenfläche der Preßtrommel (13) durch die Preßplatte (S) kontaktiert, wenn die Transferdruckmaschine betätigt ist,
    eine Preßrolle (23), die benachbart zu bzw. neben dem Transferelement (5) angeordnet ist, wobei die Preßrolle (23) dazu ausgelegt ist, zu bedruckendes Material (P) auf die Außenfläche des Transferelements (15) derart zu pressen, daß ein Bild aus Tinte, die auf das Transferelement (15) von der Preßplattentrommel (13) überführt wird, auf das Material (P) gedruckt wird, und gekennzeichnet durch: Eine Beschichtungseinrichtung (21) zum Bereitstellen einer Flüssigkeit zum Entfernen überflüssiger Tinte auf der Außenfläche des Transferelements (15), wobei die Beschichtungseinrichtung (21) auf einer stromaufwärtigen Seite einer Drehrichtung des Transferelements (15) relativ zu einem Punkt angeordnet ist, wo das Transferelement (15) und die Preßplattentrommel (13) sich kontaktieren, und
    eine Einrichtung (30) zum Entfernen überschüssiger Tinte, die auf einer stromabwärtigen Seite der Drehrichtung des Transferelements (15) relativ zu einem Kontaktbereich angeordnet ist, wo das Transferelement (15) und das Material (P) sich zum Drucken kontaktieren, wobei die Einrichtung (30) zum Entfernen überschüssiger Tinte überschüssige Tinte entfernt, die auf dem Transferelement (15) nach Drucken auf das Material (P) verbleibt, wobei die Beschichtungseinrichtung (21) hinter der Einrichtung (30) zum Entfernen überschüssiger Tinte relativ zu der Drehrichtung des Transferelements (5) so angeordnet ist, daß, nachdem die überschüssige Tinte an der Einrichtung (30) zum Entfernen überschüssiger Tinte entfernt ist, die Flüssigkeit zum Entfernen überschüssiger Tinte auf das Transferelement (15) zugeführt wird, woraufhin die Tinte auf dem Transferelement (15) bereitgestellt ist.
  2. Transferdruckmaschine nach Anspruch 1, wobei das Transferelement (15) mehrere Rollen (43a, 43b) und ein Endlosband (42) aufweist, das um die mehreren Rollen angeordnet ist.
  3. Transferdruckmaschine nach Anspruch 1 oder 2, wobei die Einrichtung (30) zum Entfernen überschüssiger Tinte einen Rückgewinnungsauffänger (19) zum Aufnehmen überschüssiger Tinte aufweist, die von dem Überführungselement (15) durch die Einrichtung (30) zum Entfernen überschüssiger Tinte entfernt ist.
EP19950307666 1994-10-28 1995-10-27 Transfer-Druckmaschine Expired - Lifetime EP0710553B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP265745/94 1994-10-28
JP6265745A JPH08118587A (ja) 1994-10-28 1994-10-28 転写方式印刷装置
JP285158/94 1994-11-18
JP6285158A JPH08142302A (ja) 1994-11-18 1994-11-18 印刷装置

Publications (3)

Publication Number Publication Date
EP0710553A2 EP0710553A2 (de) 1996-05-08
EP0710553A3 EP0710553A3 (de) 1996-05-29
EP0710553B1 true EP0710553B1 (de) 1999-01-27

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ID=26547124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950307666 Expired - Lifetime EP0710553B1 (de) 1994-10-28 1995-10-27 Transfer-Druckmaschine

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EP (1) EP0710553B1 (de)
DE (1) DE69507570T2 (de)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593661A (en) * 1966-05-13 1971-07-20 Markem Corp Dry ink-film printing
JPS60203448A (ja) * 1984-03-28 1985-10-15 Fujisash Co 金属製室内建具の印刷方法
JPH02190378A (ja) * 1989-01-19 1990-07-26 Seiki Ind Co Ltd 製版印刷装置
JPH059384A (ja) * 1990-08-21 1993-01-19 Mitsubishi Rayon Co Ltd ポリアリーレンサルフアイド樹脂組成物
JPH0531889A (ja) 1991-08-01 1993-02-09 Seiko Epson Corp 記録装置
JP3236064B2 (ja) * 1992-05-19 2001-12-04 理想科学工業株式会社 孔版印刷装置
JP3267334B2 (ja) * 1992-07-30 2002-03-18 理想科学工業株式会社 孔版転写印刷方法及び孔版転写印刷装置
US5450792A (en) * 1992-10-02 1995-09-19 Baldwin Graphic Systems, Inc. Automatic cleaning system for press rollers and cylinders
US5476043A (en) * 1993-09-16 1995-12-19 Riso Kagaku Corporation Method and device for post-processing a printed image in a printing device

Also Published As

Publication number Publication date
EP0710553A3 (de) 1996-05-29
DE69507570T2 (de) 1999-07-01
EP0710553A2 (de) 1996-05-08
DE69507570D1 (de) 1999-03-11

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