EP0056532A1 - Vorrichtung und Verfahren zum diagonalen Einstellen einer Offset-Druckmaschine und Druckmaschine mit dieser Vorrichtung - Google Patents

Vorrichtung und Verfahren zum diagonalen Einstellen einer Offset-Druckmaschine und Druckmaschine mit dieser Vorrichtung Download PDF

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Publication number
EP0056532A1
EP0056532A1 EP19810400066 EP81400066A EP0056532A1 EP 0056532 A1 EP0056532 A1 EP 0056532A1 EP 19810400066 EP19810400066 EP 19810400066 EP 81400066 A EP81400066 A EP 81400066A EP 0056532 A1 EP0056532 A1 EP 0056532A1
Authority
EP
European Patent Office
Prior art keywords
plate
cylinder
blanket
blanket cylinder
printing machine
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
EP19810400066
Other languages
English (en)
French (fr)
Other versions
EP0056532B1 (de
Inventor
Alain Ducournau
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.)
Creusot Loire SA
Original Assignee
Creusot Loire SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Creusot Loire SA filed Critical Creusot Loire SA
Priority to DE8181400066T priority Critical patent/DE3165298D1/de
Priority to EP19810400066 priority patent/EP0056532B1/de
Publication of EP0056532A1 publication Critical patent/EP0056532A1/de
Application granted granted Critical
Publication of EP0056532B1 publication Critical patent/EP0056532B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/26—Arrangement of cylinder bearings
    • B41F13/28—Bearings mounted eccentrically of the cylinder axis

Definitions

  • the present invention relates to a "crooked" correction method in an offset printing machine; it also relates to the device used for this purpose, and to a printing machine comprising such a device.
  • the plate or plate is fixed on a cylinder called plate cylinder, where it is wet and inked by contact with rollers themselves in contact with distribution rollers.
  • the ink selectively deposited on the plate is distributed over an intermediate cylinder called the blanket cylinder, and from there is deposited on the sheet of paper which passes in contact with the blanket cylinder.
  • the blanket cylinder is normally strictly parallel. If the printing takes place on only one side of the paper, the sheet is applied in contact with the blanket by a pressure counter-cylinder; very frequently for two-sided printing machines, another inking assembly with plate cylinder and blanket is arranged approximately symmetrically with respect to the first, and the sheet circulates between the two blanket cylinders, each providing back pressure for the other.
  • the plate plate is fixed and tensioned by a usual device arranged according to a generator of the plate cylinder.
  • the machines include a device for adjusting the circumferential and lateral register, allowing an angular and axial relative offset of the plate cylinder with respect to the general drive kinematic chain of the machine, so as to allow in particular the color identification on machines with several printing positions.
  • the bearings of the plate cylinders generally include the mechanisms for adjusting the circumferential and lateral locations, mechanisms which are already bulky, so that it proves difficult and complex, and consequently expensive to add an additional device for biasing by independent movement of one of the bearings.
  • the skew movement of the plate cylinder causes un.dégégage contact of the ink rollers and wetters, and to remedy this new drawback it would be necessary to introduce other devices again bulky and expensive.
  • the present invention provides a new solution for the correction on the fly of the consequences of a "skewed" defect in photographs.
  • the invention relates to a method for correcting "wrong" in a rotary offset printing machine having at least one set t a cliché plate support plate cylinder and a blanket cylinder in contact with the sheet to be printed, a process intended to compensate a slight misalignment of the plate formed on the plate.
  • action is taken by angularly displacing the axis of the blanket cylinder with respect to the axis of the plate cylinder, this displacement being effected substantially in a plane perpendicular to the plane containing the two parallel axes in their normal mean position.
  • the invention also relates to a device for setting work of this correction process, applied to a machine where the journals of the blanket cylinders are carried by eccentric bearings associated with a device for controlling the rotation of these eccentric bearings, to separate or bring the blanket closer to the sheet to be printed.
  • the eccentric bearings of the blanket cylinders are themselves each carried by an eccentric sleeve engaged in a bore of the frame; for each cylinder blanket the eccentric sleeve on one of the journals is held fixed in the frame, while the other T is associated with a controlled rotating mechanism, the relative positions of the centers of the eccentric components of the socket being determined so that in the normal range of movement, the movement of the axis of the blanket cylinder can remain comparable to a movement in a plane perpendicular to the plane defined by the parallel axes of the blanket cylinder and the plate cylinder in the normal normal position .
  • the blanket cylinder 4 is carried by the bearings 16 and 17, each each engaged in an eccentric housing 18 and 19. Similarly, the blanket support bearings 3 are held in the eccentric housings 20 and 21.
  • This mounting on the eccentric housing constitutes a usual arrangement on such machines, and is used to be able to pressurize the blanket cylinders for example when the machine stops.
  • a control device (not shown) simultaneously rotates the two housings of each of the pins to produce a movement of spacing or parallel approaching of the cylinders relative to one another.
  • the device can also be used to adjust the pressure of the blanket cylinders against each other according to the characteristics of the printed sheet.
  • each of the eccentric housings 18, 19, 20 and 21 of the blanket cylinder bearings is itself included in another eccentric sleeve respectively 24, 25, 26 and 27, each engaged in a bore of the frames 1 or 2.
  • the sockets 24 and 26 are locked in rotation in the frame 1 by screws between leather and flesh 29 and 30.
  • the eccentric sockets 25 and 27 can be operated in rotation by a device more visible in Figures 2 and 3. We have shown in these two figures that the device for the cylinder 4, but of course, the other blanket cylinder 3 is provided with a control device identical in all respects .
  • a part 32 in the form of an annular sector is fixed by screws 33 to the external flange 34 of the sleeve 25.
  • the part 32 has a countersink which forms a yoke with the flange 34, and a threaded nut 36 is held captive in the yoke while remaining freely articulated on pins engaged in corresponding bores of the part 32 and the flange 34.
  • the threaded end 37 of a control rod 38 is engaged in the nut 36; the rod 38, which can rotate freely in the bore of a support 39 fixed to the frame, is blocked in axial movement by two rings 40 which respectively come into abutment on one or the other face of the support 39.
  • the relative position of the centers of the eccentric elements of the sleeve is determined so that in the normal range of movement the movement of the cylinder axis can be assimilated to a movement in a plane perpendicular to the plane defined by the axes of the blanket cylinder and the plate cylinder in the normal position.
  • the angular displacement of the blanket cylinder resulting from the rotation of the sleeve 25 is such that the distances between cylinders are preserved, so that the pressure setting of the plate cylinder on the blanket or of the blanket on the sheet are not not affected.
  • the invention is not strictly limited to the embodiment which has been described by way of example, but it also covers the embodiments which would differ from it only in details, in variant embodiments or in the use of equivalent means.
  • the invention applies in the same way whether it is a double-sided or single-sided offset printing machine, the devices used being identical for each blanket cylinder in the case of a machine both sides.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
EP19810400066 1981-01-19 1981-01-19 Vorrichtung und Verfahren zum diagonalen Einstellen einer Offset-Druckmaschine und Druckmaschine mit dieser Vorrichtung Expired EP0056532B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8181400066T DE3165298D1 (en) 1981-01-19 1981-01-19 Method and means for diagonal adjustment in an offset-printing machine, and printing machine produced with said means
EP19810400066 EP0056532B1 (de) 1981-01-19 1981-01-19 Vorrichtung und Verfahren zum diagonalen Einstellen einer Offset-Druckmaschine und Druckmaschine mit dieser Vorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19810400066 EP0056532B1 (de) 1981-01-19 1981-01-19 Vorrichtung und Verfahren zum diagonalen Einstellen einer Offset-Druckmaschine und Druckmaschine mit dieser Vorrichtung

Publications (2)

Publication Number Publication Date
EP0056532A1 true EP0056532A1 (de) 1982-07-28
EP0056532B1 EP0056532B1 (de) 1984-08-08

Family

ID=8188497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810400066 Expired EP0056532B1 (de) 1981-01-19 1981-01-19 Vorrichtung und Verfahren zum diagonalen Einstellen einer Offset-Druckmaschine und Druckmaschine mit dieser Vorrichtung

Country Status (2)

Country Link
EP (1) EP0056532B1 (de)
DE (1) DE3165298D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264830A3 (de) * 1986-10-17 1989-02-15 Akira Hayashi Schallerzeugende Membran

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH382766A (de) * 1959-04-08 1964-10-15 Maschf Augsburg Nuernberg Ag Einrichtung zum Einstellen der Zylinder von Offsetmaschinen
US3817173A (en) * 1971-09-13 1974-06-18 Polygraph Leipzig Diagonal register adjustment of plate cylinder and applicator rolls in a rotary printing machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH382766A (de) * 1959-04-08 1964-10-15 Maschf Augsburg Nuernberg Ag Einrichtung zum Einstellen der Zylinder von Offsetmaschinen
US3817173A (en) * 1971-09-13 1974-06-18 Polygraph Leipzig Diagonal register adjustment of plate cylinder and applicator rolls in a rotary printing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264830A3 (de) * 1986-10-17 1989-02-15 Akira Hayashi Schallerzeugende Membran

Also Published As

Publication number Publication date
EP0056532B1 (de) 1984-08-08
DE3165298D1 (en) 1984-09-13

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