EP0466433B1 - Vorrichtung zur Herstellung einer Druckplatte und damit hergestellte Platte - Google Patents

Vorrichtung zur Herstellung einer Druckplatte und damit hergestellte Platte Download PDF

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Publication number
EP0466433B1
EP0466433B1 EP91306174A EP91306174A EP0466433B1 EP 0466433 B1 EP0466433 B1 EP 0466433B1 EP 91306174 A EP91306174 A EP 91306174A EP 91306174 A EP91306174 A EP 91306174A EP 0466433 B1 EP0466433 B1 EP 0466433B1
Authority
EP
European Patent Office
Prior art keywords
printing plate
laser beam
laser
printing
angle
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
EP91306174A
Other languages
English (en)
French (fr)
Other versions
EP0466433A3 (en
EP0466433A2 (de
Inventor
Sohichi Kuwahara
Shigeyoshi Hirashima
Tatsumi Ito
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.)
Sony Corp
Original Assignee
Sony 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 JP2180893A external-priority patent/JP3036003B2/ja
Priority claimed from JP2180894A external-priority patent/JP3036004B2/ja
Application filed by Sony Corp filed Critical Sony Corp
Priority to EP95200901A priority Critical patent/EP0668158B1/de
Publication of EP0466433A2 publication Critical patent/EP0466433A2/de
Publication of EP0466433A3 publication Critical patent/EP0466433A3/en
Application granted granted Critical
Publication of EP0466433B1 publication Critical patent/EP0466433B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam

Definitions

  • the present invention generally relates to apparatus for making a printing plate and a printing plate thereof and, more particularly, is directed to an apparatus for making a printing plate and a printing plate thereof suitable for printing, such as a gravure printing and so on.
  • a wide variety of printing methods are proposed for printing and a variety of printing plates, such as relief printing, offset printing, intaglio printing, silk screen printing or the like are employed. Particularly, when pictures such as photographs and so on are printed on a large number of copies at high speed, intaglio printing is used.
  • the assignee of the present invention has previously proposed an inexpensive apparatus for making a printing plate and a printing plate thereof.
  • the previously-proposed apparatus and the printing plate thereof can provide a printing of high quality and are suitable for the printing of medium quantity of papers of that they can be made for personal use or for office use (see US-A-07/404 555 filed 8 September 1989 on which the precharacterising portion of claim 1 is based).
  • Figure 1 of the accompanying drawings shows a conceptual diagram of an optical system of such previously-proposed apparatus for making a printing plate.
  • a small energy emitting type semiconductor laser 1 of about 1 Watt is employed to form holes 3 on a printing plate 2.
  • an input image signal 4 from an image scanner or the like is supplied to the semiconductor laser 1, in which it is directly modulated by turning on and off the semiconductor laser 1 by the image input signal which results from pulse code modulating (PCM) a drive current. For this reason, a laser beam emitted from the semiconductor laser 1 is turned on and off in synchronism with the image signal.
  • PCM pulse code modulating
  • the laser beam from the semiconductor laser 1 is collimated by a collimator lens 5 and introduced through an objective lens 6 into the printing plate 2 so that the laser beam is focused on the surface position of the printing plate 2.
  • the semiconductor laser 1, the collimator lens 5 and the objective lens 6 constitute a laser block 14, and this laser block is located so as to focus the laser beam on a plate cylinder 8 at its predetermined position on the leftmost side.
  • the plate cylinder 8 is rotated in the direction shown by an arrow B in Figure 1 by a plate cylinder rotating motor (not shown) coupled to a plate cylinder shaft 9 so that, when the plate cylinder 8 is rotated once, the holes 3 of one track along the circumference of the plate cylinder 8 are made by the laser beams to thereby form the holes 3 of predetermined one track amount. Then, if the laser block 14 is moved in the axial direction of the plate cylinder 8 by the amount of one pixel to allow the laser beam to scan the surface of the printing plate 2, the predetermined holes 3 are formed over two tracks. Therefore, if such scanning of laser beam is sequentially carried out on the whole surface of the plate cylinder 8, then holes 3 corresponding to the light and shade (i.e. image information) of the input image signal 4 are formed on a synthetic resin material coated on the surface of the printing plate 2.
  • the angles of the printing plates 2 of deep colours such as cyan, magenta, black or the like are set to be 30° in which the moiré becomes inconspicuous relatively such as when the angle of the black printing plate 2 is 45°, the angle of the magenta printing plate 2 is 75°, the angle of the yellow printing plate 2 is 90° and the angle of the cyan printing plate 2 is 105°. If the attaching angle is 15°, the moiré tends to become conspicuous as compared with the attaching angle of 30°.
  • the moiré can be made inconspicuous.
  • an apparatus for making a printing plate comprising:
  • holes is not limited to holes which extend entirely through the sheet but encompasses surface treatments sufficient to achieve printing, e.g. depressions on the surface.
  • the pattern of the holes formed on the printing plate by the apparatus for making a printing plate is hyperelliptic as shown by reference numeral 10 in Figure 2.
  • the major axis length of this hyperelliptic pattern 10 is 150 ⁇ m and the minor axis length thereof is about 5 ⁇ m.
  • the pattern of hole 3 is hyperelliptic, it is possible to obtain the printing plate in which the shape, pitch or angle of the pattern 10 of the hole 3 formed on the printing plate 2 are variously changed only by adjusting the optical system of the apparatus for making a printing plate.
  • a printing plate having different dot patterns can be obtained by scanning the elliptic pattern of the laser beam projected on the printing plate in the minor axis direction. Also, a printing plate having different dot patterns and different dot angles can be obtained with ease by rotating the optical axis of the laser light source in the clockwise or counter-clockwise direction by the single optical system. Further, if the printing is made by using a plurality of printing plates thus obtained, it is possible to effectively prevent the occurrence of moiré. Furthermore, if the dots are coupled on the line, then it is possible to suppress the cause of occurrence of the moiré.
  • Embodiments of the apparatus for making a printing plate and the printing plate thereof according to the present invention will hereinafter be described with reference to FIGS. 3 through 17.
  • FIG. 3 shows a systematic block diagram of the apparatus for making a printing plate according to the embodiment of the present invention and is formed of FIGS. 3A and 3B drawn on two sheets of drawings so as to permit the use of a suitably large scale.
  • Data image information corresponding to the light and shade of the image signal is supplied to the semiconductor laser 1 through this system shown in FIGS. 3A, 3B.
  • FIGS. 3A, 3B like parts corresponding to those of FIGS. 1 and 2 are marked with the same references and therefore need not be described in detail.
  • a status signal 31 such as stop, reset or the like is supplied from an input operation unit 30 to a microcomputer (hereinafter referred to as a CPU (central processing unit)) 32.
  • the CPU 32 supplies a positive rotation pulse or a reverse rotation pulse to a laser block moving motor driver 33 and a plate cylinder rotating motor driver 34 to drive the laser block moving motor 34 and the plate cylinder rotating motor 36.
  • the plate cylinder driving motor 38 rotates the plate cylinder 8 and the semiconductor laser 1 forms the holes 3 corresponding to data 48 of the input image signal from an input signal source 49 on the printing plate 2.
  • the laser block moving motor 34 is moved by the amount of one pixel data.
  • the CPU 32 includes a control means which rotates the plate cylinder 8 in the up or down direction by the amount of half pixel to thereby control the irradiation position of the laser beam so that the holes 3 are made continuous at a predetermined angle.
  • a rotational angle of the plate cylinder 8 may be detected by using a rotary encoder 90 and a data reading start the from a data RAM (random access memory) 38 may be shifted by a predetermined rotational angle.
  • the data RAM 38 stores 8 bits of digital image data D obtained by an image scanner or the like per pixel.
  • the CPU 32 drives an address counter 37 so as to supply an output address A to the data RAM 38.
  • the image data D is supplied to the addresses A17 to A10 of the gray scale ROM 41 and the gray scale ROM 41 is supplied at its addresses A9 to A0 with 10 bits from a counter 40 which is driven by a pulse from a pulse generator 39.
  • the gray scale ROM 41 is adapted to convert the light and shade of the image into a duration of the laser irradiation time.
  • Data of the gray scale ROM 41 is supplied to an AND gate 42 and the modulated pulse from the pulse generator 39 is controlled, whereby the semiconductor laser 1 is driven by means of a laser driver 43.
  • the CPU 32 controls a stepping motor 46 which can adjust the irradiation angle of semiconductor laser 1 provided within the laser block. More specifically, the CPU 32 supplies a stepping motor control circuit 44 with data corresponding to the instruction with respect to the radiation angle of the semiconductor laser 1 from the input operation unit 30. Then, the stepping motor control circuit 44 supplies this data to the stepping motor driver 45 to rotate the stepping motor 46 by a predetermined rotational angle.
  • FIG. 4 is a plan view illustrating the apparatus according to the embodiment of the present invention.
  • a plate cylinder rotating unit 12 and a a laser block moving unit 13 are mounted on a base table 13.
  • the laser block 14 is moved along a guide unit 15 in the axial direction of the plate cylinder 8.
  • FIG. 5 which shows the mounted condition of the printing plate 2
  • the plate cylinder 8 of the plate cylinder rotating unit 12 is cylindrical and made of metal.
  • the printing plate 2 made of synthetic resin is wrapped along the outer diameter of the cylindrical portion of the plate cylinder rotating unit 12 and secured thereto by fitting flat head screws 16 into screw apertures 17 bored through the plate cylinder 8.
  • the method for securing the printing plate 2 around the cylindrical portion of the plate cylinder rotating unit 12 is not limited to the above method and a variety of methods may be selected properly.
  • the printing plate 2 is secured around the cylindrical portion by a double-sided adhesive tape or the like.
  • the printing plate 2 may be made of a thermoplastic resin whose boiling point is distributed in a relatively narrow range and which is sufficiently hard when cured and in which resin is scattered or sublimated at low temperature when melted.
  • a thermoplastic resin in which about 20 % of carbon is mixed into polyethylene resin, acrylic resin, polypropylene resin or the like.
  • a thickness t of the printing plate 2 is selected to be about 200 microns.
  • Metal caps 19R,19L are inserted into the right and left ends of the plate cylinder 8 so as to secure the right and left ends of the printing plate 2.
  • Shafts 18R,18L are implanted on the caps 19R,19L and coupled to the plate cylinder rotating motor 36, whereby the plate cylinder 8 is rotated in the direction shown by an arrow B in Figure 5.
  • the reference numerals 20R,20L designate bearing portions which receive the shafts 18R,18L of the metal caps 20R,20L, respectively.
  • the laser block 14 is disposed in an opposing relation to the printing plate 2 wrapped around the plate cylinder 8 and is arranged so as to move along a guide portion 15 in the axial direction of the plate cylinder 8.
  • the laser block moving unit 13 for moving this laser block 14 is bridged between the bearing portions 21R and 21L and includes a moving member 24 which is engaged with a screw lever 23 rotated by the laser block moving motor 34 so as to move.
  • a laser rod attaching base 50 of the laser block 14 is secured to the moving member 24.
  • Figure 6 is a perspective view illustrating the entirety of the laser block 14 in its assembled state
  • Figure 7 is a partly cross-sectional plan view of the assembled state of the laser block 14
  • Figure 8 is an exploded perspective view of the laser block 14.
  • a stepping motor attaching plate 51 is secured to a laser head mounting base 50 formed of a plate of substantially T-letter configuration by screws and the stepping motor 46 is secured to this mounting plate 51 as shown in FIG. 8.
  • a first gear 52 is engaged into and secured to the rotary shaft of the stepping motor 46.
  • a laser holder supporting box 53 is secured to the laser head mounting base 50 and the optical system of the semiconductor laser 1 or the like is assembled within this supporting box 53.
  • the semiconductor laser 1 is secured to a semiconductor laser support 54 and is supplied with an electrical signal from a through-hole 55 bored through the central portion of the semiconductor laser support 54 through a stem pin.
  • This semiconductor laser support 54 is screwed by screws 60 into tap bores 59 bored through the rear surface of a laser holder 58 engaged into a through-hole 57 bored through the center of a second gear 56.
  • a first stepped portion 62 elongated from a flange portion 61 of the laser holder 58 is loosely fitted into a through-hole 64 bored through the center of the laser holder supporting box 53 so as to be freely rotatable, while the through-hole 57 of the second gear 56 is inserted into and secured to the second stepped portion 63 of the laser holder 58.
  • the top of the semiconductor laser 1 is protrusively inserted into one side end of a central aperture 64 bored through the center of the laser holder 58 and the collimator lens 5 is inserted into this central aperture 64 by means of a collimator lens adjusting coil spring 65. Then, a collimator lens adjusting screw 66 is inserted into and screwed into the central aperture 64 and the collimator lens 5 is housed in and secured to the laser holder 58.
  • An outer portion of an objective lens holder 67 is composed of a stepped portion 68 whose outer diameter is the same as that of the flange portion 61 of the laser holder 58, a flange portion 69 and a screw portion 70 having screws formed therearound, and a central aperture 71 is formed at the central portion of the objective lens holder 67.
  • the stepped portion 68 of the objective lens holder 67 is engaged into the through-hole 64 of the laser holder supporting box 53, an objective lens cover 73 into which the objective lens 6 is inserted is inserted through a focus adjusting spring 72 into a central aperture 71 and a focus adjusting screw 74 is screwed into the screw portion 70, thereby the laser block 14 being constructed.
  • an angle adjusting means 53 for adjusting the radiation angle of the laser is composed of the stepping motor 46, the first and second gears 52, 56 and the laser holder 58.
  • the input image signal from the input signal source 49 such as the image scanner or the like is supplied to and pulse code modulated so as to be turned on and off.
  • the hyperelliptic pattern 10 shown in FIG. 9A is formed on the printing plate 2 by an "on” pulse and an "off” pulse shown in FIG. 9B in the prior art, according to this embodiment, a rectangular pattern 10a or a square pattern 10b shown in FIG. 9A is obtained.
  • the irradiation angle of the semiconductor laser 1 is rotated by a predetermined angle from the hyperelliptic pattern 10 of the horizontal direction as shown in FIG. 11A to the clockwise or counter-clockwise direction before forming the holes 3 on the printing platet 2 so that the irradiation angle is inclined as shown by a pattern 10c shown in FIG. 10A.
  • the irradiation angle of the semiconductor laser 1 is inclined by a predetermined angle, such predetermined angle is instructed to the CPU 32 by the input operation unit 30 and then the CPU 32 instructs the pulse number for inclining the irradiation angle by a predetermined angle to the stepping motor control circuit 44, whereby the stepping motor 46 is stepped by a predetermined angle.
  • the laser holder 58 is rotated by a predetermined angle in the clockwise or counter-clockwise direction via the first and second gears 52 and 56 so that the irradiation angle of the semiconductor laser 1 is changed to produce the pattern 10c of FIG. 10A. Under this condition, although the "on" pulse and "off” pulse are set in a relation shown in FIG.
  • the shape of the pattern can be changed variously from rectangular, square and lozenge so that dot angle, dot shape and dot pitch can be changed with ease. Therefore, it is possible to obtain the apparatus for making a printing plate and a printing plate thereof in which moiré of the printed product can be avoided with ease.
  • FIGS. 11A through 11F are representations of patterns of various configurations formed on the printing plate 2. In these patterns shown in FIGS. 11A to 11F, the concentration of the pattern is made uniform in order to understand the configurations of the patterns more clearly.
  • the hyperelliptic pattern 10 in the horizontal direction is rotated in the counter-clockwise direction and the rotational angle is 30 degrees.
  • the hyperelliptic pattern 10 is rotated in the clockwise direction and the rotational angle is 30 degrees, that is, -30 degrees.
  • the hyperelliptic patterns 10 in the horizontal direction are respectively rotated in the counter-clockwise and clockwise directions by 60 degrees.
  • the laser irradiation is started at the position a half pixel above the position of the pattern 77a.
  • the starting points 77a, 78b, ... are positioned in the X axis direction in a zigzag-fashion and therefore such pattern is presented, in which the holes are formed continuously substantially in the irradiation direction of laser beam as generally seen from the printing plate. Further, the pitches in the X direction and Y direction between the pixels are properly set.
  • FIG. 11E shows the pattern of the printing plate 2e which is obtained by the method described with reference to FIG. 7 without changing the angle.
  • FIG. 11F shows the pattern in which the major axis of the hyperelliptic pattern obtained by the semiconductor laser 1 is made coincident with the vertical direction by adjusting the angle and the laser beam is scanned in the X axis direction.
  • the pattern is formed by moving the semiconductor laser pattern 10 shown in FIG. 9A along the circumferential direction (Y axis direction) of the plate cylinder 8 similarly to FIG. 11E and in this case, a gap 79 between adjacent tracks provided when the pattern of one track is formed is increased.
  • FIGS. 12A through 12F show dot patterns 80a to 80g of printing products obtained by the sheets 2a, 2b, 2c, 2d, 2e. 2f shown in FIGS. 11A through 11G.
  • the dot patterns 12A through 12F are composed of the dot patterns 80a, 80b, 80c, 80d having an inclined stripe pattern in which dots are made continuous on the line and the dot patterns 80e, 80f having horizontal and vertical stripes so that the cause of moiré can be reduced by a half as compared with other dot patterns.
  • cyan C is printed by the printing plate 2a shown, for example, in FIG. 11A
  • magenta M is printed by the printing plate 2b shown in FIG. 11B
  • yellow Y and blue B are printed by the printing plate 2g shown in FIG. 11G with the result that printed products in which moiré is inconspicuous could be obtained.
  • FIG. 14A shows the intaglio printing dot pattern of the printing plate 2a in an enlarged scale.
  • a, b, c, d and e, f, g, h are printing plate dot patterns between adjacent slant lines 82, 83, then printing plate dots a, b, c, d and e, f, g, h are coupled to one another to obtain printed products of slant stripe lines 82, 83.
  • inks A and E slightly contact with the intaglio dot pattern a on the line 82 and the intaglio dot pattern e on the line 83 by means of a doctor knife or the like as shown in FIG.
  • FIG. 16 shows a part of the intaglio dot pattern represented by reference letter W in FIG. 15 in an enlarged scale. As shown in FIG.
  • such a pattern is formed that intaglio slots a3, b3, c3, d3, a2, b2, c2, d2, e2, f3, g3, h3 and e2, f2, g2, h2 are formed closely above and below the intaglio dot patterns a, b, c, d and e, f, g, h on the lines 82 and 83 so as to have widths narrower than those of the above intaglio dot patterns a, b, c, d and e, f, g, h.
  • Such pattern as shown in FIG. 16 can be arranged with ease by the earlier-noted arrangement of FIG. 3.
  • the irradiation angle of the laser beam from the semiconductor laser 1 is adjusted so as to become 30 degrees in the counter-clockwise direction and then narrow, wide and narrow "on" pulses are supplied to the semiconductor laser 1.
  • the ink from the intaglio dot pattern a is influenced with the intaglio slots a3, a2
  • the ink from the intaglio dot pattern e is influenced with the intaglio slots e3, e2, thereby producing the pattern in which the intaglio patterns a and e can be separated from each other.
  • the ink escaped from the intaglios dot pattern a reaches the intaglio slots a2 and e3 in FIG. 16, then the amount of the ink escaped from the intaglio slot e3 is small as compared with the amount of the ink escaped from the intaglio dot pattern e. Then, this influence can be substantially prevented from being exerted upon the intaglio slots f3 and b2.
  • FIG. 17 shows a further example of a modified printing plate.
  • the lower side intaglio slots a2, b2, c2, d2 and e2, f2, g2, h2 shown in FIG. 16 are removed and the intaglio slots are provided only in the upper side as shown by a3, b3, c3, d3 and e3, f3, g3, h3.
  • the irregular continuous dots on the printed product can be reduced so that the printed product in which the gradation is partly changed abruptly cannot be made with ease. Furthermore, it is possible to obtain the apparatus for making a printing plate and the printing plate thereof in which the moiré can be reduced.
  • the apparatus for making a printing plate and the printing plate thereof of the present invention it is possible to obtain the printing plate having a variety of dot patterns only by changing the optical system of the apparatus for making a printing plate. Also, by making the gravure printing by using the printing plates in which the dot angles and the dot patterns of these printing plates are changed, it is possible to obtain the printed product in which the occurrence of moiré can be suppressed.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Claims (3)

  1. Vorrichtung zur Herstellung einer Druckplatte, mit:
    (a) einem Zylinder (8);
    (b) einem thermoplastischen Kunststoffbogen (2), der um den Zylinder (8) geschlungen ist;
    (c) einer ersten Ansteuereinrichtung (36), die mit dem Zylinder (8) gekoppelt ist, um den Zylinder (8) mit einer vorgegebenen Geschwindigkeit zu drehen;
    (d) einer Laserstrahl-Projiziereinrichtung (14) zum Projizieren eines Laserstrahls von einem Halbleiterlaser (1) auf den Kunststoffbogen (2), um Löcher (3) auf dem Kunststoffbogen (2) gemäß einer Bildinformation zu erzeugen, wobei der Querschnitt des Laserstrahls Haupt- und Nebenachsen unterschiedlicher Länge besitzt;
    (e) einer zweiten Ansteuereinrichtung (34), die mit der Laserstrahl-Projiziereinrichtung (14) gekoppelt ist, um die Laserstrahl-Projiziereinrichtung (14) in einer axialen Richtung des Zylinders (8) mit einer vorgegebenen Geschwindigkeit zu verschieben; gekennzeichnet durch
       eine Winkeleinstelleinrichtung (46), die mit der Laserstrahl-Projiziereinrichtung (14) gekoppelt ist, um bei der Projizierung den Orientierungswinkel der Achsen des Laserstrahls rund um die Strahlrichtung zu ändern.
  2. Vorrichtung zur Herstellung einer Druckplatte nach Anspruch 1, die außerdem eine Steuereinrichtung (32, 44) aufweist, um den Orientierungswinkel des Laserstrahls so zu steuern, daß die Löcher (3) sich gemeinsam auf einem auswählbaren Winkel erstrecken.
  3. Vorrichtung zur Herstellung einer Druckplatte nach Anspruch 1 oder 2, wobei der Laserstrahl so projiziert wird, daß er in der Nähe der Löcher (3) Schlitze (a2, a2-h2, h3) bildet, deren Breite schmäler als die der Löcher (3) ist.
EP91306174A 1990-07-09 1991-07-08 Vorrichtung zur Herstellung einer Druckplatte und damit hergestellte Platte Expired - Lifetime EP0466433B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95200901A EP0668158B1 (de) 1990-07-09 1991-07-08 Druckplatte

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP180894/90 1990-07-09
JP180893/90 1990-07-09
JP2180893A JP3036003B2 (ja) 1990-07-09 1990-07-09 製版装置及びその凹版シートの製造方法
JP2180894A JP3036004B2 (ja) 1990-07-09 1990-07-09 製版装置及び製版方法並びにそれらの凹版シート

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP95200901.7 Division-Into 1991-07-08

Publications (3)

Publication Number Publication Date
EP0466433A2 EP0466433A2 (de) 1992-01-15
EP0466433A3 EP0466433A3 (en) 1993-03-17
EP0466433B1 true EP0466433B1 (de) 1996-04-17

Family

ID=26500259

Family Applications (2)

Application Number Title Priority Date Filing Date
EP91306174A Expired - Lifetime EP0466433B1 (de) 1990-07-09 1991-07-08 Vorrichtung zur Herstellung einer Druckplatte und damit hergestellte Platte
EP95200901A Expired - Lifetime EP0668158B1 (de) 1990-07-09 1991-07-08 Druckplatte

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP95200901A Expired - Lifetime EP0668158B1 (de) 1990-07-09 1991-07-08 Druckplatte

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DE (2) DE69125958T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1246734B (it) * 1990-12-24 1994-11-26 Ms Servizi Informatici Apparecchiatura elettronica per l'incisione mediante raggio laser di quadri da stampa serigrafica e simili.
DE19845436C5 (de) * 1998-10-02 2015-02-26 Giesecke & Devrient Gmbh Stichtiefdruckverfahren zum Drucken von aneinander grenzenden Farbflächen unterschiedlicher Farbschichtdicke, Datenträger mit im Stichtiefdruckverfahren erzeugtem Druckbild, Druckplatte und Verfahren zum Herstellen einer Druckplatte
DE10033629B4 (de) * 2000-07-11 2011-12-01 Tampoprint Ag Druckklischee
CN108248200B (zh) * 2016-12-29 2023-04-25 上海运安制版有限公司 一种用于瓷砖印刷的辊筒及其制备工艺
CN113478948B (zh) * 2021-07-01 2022-12-02 绍兴鑫昌印花机械科技有限公司 一种双激光制网机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662455A (en) * 1949-06-08 1953-12-15 Intertype Corp Means for gravure printing of typographical characters

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149183A (en) * 1976-05-21 1979-04-10 Xerox Corporation Electronic halftone generator
GB2030929B (en) * 1978-09-15 1982-11-24 Crosfield Electronics Ltd Gravure printing formes
JPS62238743A (ja) * 1986-04-10 1987-10-19 Dainippon Printing Co Ltd グラビア印刷用ドクタ−刃
JPH02139238A (ja) * 1988-09-13 1990-05-29 Sony Corp 凹版の版胴装置
JPH0691621B2 (ja) * 1988-11-24 1994-11-14 大日本スクリーン製造株式会社 網目版画像記録方法および装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662455A (en) * 1949-06-08 1953-12-15 Intertype Corp Means for gravure printing of typographical characters

Also Published As

Publication number Publication date
DE69125958T2 (de) 1997-08-21
EP0668158B1 (de) 1997-05-02
EP0466433A3 (en) 1993-03-17
DE69125958D1 (de) 1997-06-05
EP0668158A1 (de) 1995-08-23
EP0466433A2 (de) 1992-01-15
DE69118763T2 (de) 1996-09-19
DE69118763D1 (de) 1996-05-23

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