EP0657284A1 - Dispositif pour l'introduction et/ou l'extraction automatique de plaques d'impression - Google Patents

Dispositif pour l'introduction et/ou l'extraction automatique de plaques d'impression Download PDF

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Publication number
EP0657284A1
EP0657284A1 EP94118916A EP94118916A EP0657284A1 EP 0657284 A1 EP0657284 A1 EP 0657284A1 EP 94118916 A EP94118916 A EP 94118916A EP 94118916 A EP94118916 A EP 94118916A EP 0657284 A1 EP0657284 A1 EP 0657284A1
Authority
EP
European Patent Office
Prior art keywords
printing
gripper system
cylinder
plate
sheet
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
EP94118916A
Other languages
German (de)
English (en)
Other versions
EP0657284B1 (fr
Inventor
Michael Dr. Koch
Arndt Jentzsch
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.)
KBA Planeta AG
Original Assignee
KBA Planeta AG
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 KBA Planeta AG filed Critical KBA Planeta AG
Publication of EP0657284A1 publication Critical patent/EP0657284A1/fr
Application granted granted Critical
Publication of EP0657284B1 publication Critical patent/EP0657284B1/fr
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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/60—Devices for transferring printing plates
    • B41P2227/61—Devices for transferring printing plates using the sheet feed system

Definitions

  • the invention relates to a device for the automatic insertion and / or removal of flexible printing plates on printing machines.
  • a method and a device for the automatic insertion and / or removal of flexible printing plates onto / from a printing form cylinder provided with plate grippers via sheet conveyors provided on the printing press and an intermediate cylinder provided with auxiliary grippers is known (DE 42 20 011).
  • the conveyance of the printing plate via the sheet path means that the printing plate leading edge in the system is aligned with the front marks and is conveyed via the known sheet conveying means, for example the transfer drum and the printing cylinder.
  • the leading edge of the printing plate occupies the same position as the leading edge of the sheet. The problem arises that the distance of the earliest possible printing insert from the leading edge is greater for the printing plate than for the sheet.
  • the object of the invention is to compensate for the phase offset of the printing insert lines in relation to the leading edge of the sheet and the leading edge of the printing plate during the automatic insertion and / or removal of printing plates via the sheet path.
  • Fig. 1 the view of a sheet-fed printing machine is shown, which consists of a feed device, two identically constructed printing units 2 and a discharge device, not shown.
  • the feed device which leads to the printing units 2, is composed of a feeder 1, a feed table 3, a pre-gripper 10, a feed drum 11 and an alignment device 12 and, depending on the position of the printing unit 2, from one or more sheet conveyors leading to the printing unit are designed as a sheet guide cylinder or as chain guides, not shown.
  • Sheet guiding cylinders are the cylinders that convey the sheet 18 in normal operation and the printing plate 4 in printing plate conveying operation with the aid of existing gripper systems 5, such as the transfer drum 13, the printing cylinder 14 and, in the case of surface and reverse printing machines, the SW drum (not shown).
  • An auxiliary gripper system 7 for printing plate transport is arranged in the intermediate cylinder duct 15 of the intermediate cylinder 6.
  • the rubber blanket 16 is stretched on the intermediate cylinder 6 using generally known tensioning means.
  • the intermediate cylinder 6 corresponds to the printing form cylinder 8, which is designed as a plate cylinder.
  • a plate gripper system 9 is arranged in the printing form cylinder channel 17 for the printing plate leading edge 4.1 and the printing plate trailing edge 4.2, by which the printing plate 4 fed to the printing form cylinder 8 is held and tensioned.
  • At least one gripper system 5, 7, 9 is designed to be movable relative to the sheet and / or printing plate conveying direction, movement in the direction of rotation when the printing plates 4 are drawn in and counter to the direction of rotation when the printing plates are extracted.
  • the movably designed gripper system 5 of the pressure cylinder 14 shown in FIG. 3 serves to implement the compensation of the phase offset.
  • the pressure cylinder 14 and the intermediate cylinder 6 remain in the same position relative to one another in the printing plate conveyor operation as in normal operation.
  • the auxiliary gripper system 7 of the intermediate cylinder 6 is offset by the amount of the phase offset P in the intermediate cylinder with respect to the channel edge 20.
  • the auxiliary gripper system 7 can be pivoted in normal operation to below the intermediate cylinder periphery.
  • the gripper system 5 of the pressure cylinder 14 is mounted on rollers 23 which are connected via a coupling 24 to a roller lever 26 which is operatively connected to a curve 25.
  • the rollers 23 and thus the gripper system 5 preferably roll on a radius track 22; other cam tracks are conceivable.
  • the auxiliary gripper system 7 is mounted on a lever arm 29 in the intermediate cylinder center 30, pivotable on an intermediate cylinder radius track 28.
  • the lever arm 29 is connected to a roller lever arm 31 which is operatively connected to an actuation curve 32.
  • the printing plate 4 is taken over by the gripper system 5 of the printing cylinder 14 through the auxiliary gripper system 7 of the intermediate cylinder 6 and, after the phase shift compensation, is transferred from the auxiliary gripper system 7 to the plate gripper system 9, which is arranged in the printing form cylinder channel 17 of the printing form cylinder 8.
  • the plate gripper system 9 is shown in the takeover / transfer position and in the operating position, which corresponds to the position in normal operation.
  • the coupling gear is designed so that it moves the auxiliary gripper 7 in the pressure plate conveying direction for the purpose of compensating for the phase shift P, the auxiliary gripper 7 for the purpose of transferring to or taking over from the plate gripper system 9.1 moves and swivels in the radial direction.
  • the swiveling and radial movement enables the plate gripper system 9 to be arranged firmly below the printing form cylinder periphery 27.
  • the plate gripper system 9, which is movably arranged in the printing form cylinder 8 (FIG. 6), serves to implement the compensation of the phase offset P via the plate gripper system 9.
  • the plate gripper system 9 is connected to an angle lever 34, which carries a cam roller 36, which is operatively connected to a swivel cam 35.
  • the position in which the pressure plate 4 is taken over is shown fully drawn out; the operating position is shown in dashed lines.
  • the plate gripper system can be moved once into the operating position up to the printing form cylinder periphery 27 (FIG. 6) or only in the circumferential direction - in this position the plate gripping system 9 is not guided up to the printing form cylinder periphery. It can be seen that the pressure application line 19 has been brought into line with the target pressure application line 37.
  • the printing plate 4 is fed to the printing form cylinder 8 on the sheet path via the intermediate cylinder 6.
  • the feeding of the printing plate 4 begins analogously to the feeding of sheets with the separation at the feeder 1, which transfers the printing plate 4 to the feed table 3.
  • the printing plate 4 is aligned on the feed table 3 with the aid of an aligning device 12 provided for the sheet alignment.
  • the printing plate 4 is then analogous to the sheet (not shown) via the pre-gripper 10 and the feed drum 11 to the printing cylinder 14 of the first printing unit and, in the case of downstream further printing units, from the printing cylinder 14 of the first printing unit via a transfer drum 13 to the printing cylinder of the second printing unit and analogously to further printing units with the existing gripper systems 5.
  • the printing plate 4 is then transferred from the printing cylinder 14 to the intermediate cylinder 6, which is designed as a rubber cylinder.
  • the transfer of the pressure plate 4 takes place from the existing gripper system 5 of the pressure cylinder 14 to the auxiliary gripper system 7 arranged in the intermediate cylinder channel 15 of the intermediate cylinder 6.
  • the pressure plate 4 is transferred from the auxiliary gripper system 7 into the plate gripper system 9.
  • the front plate gripping system 9.1 After taking over the leading edge 4.1 of the printing plate by the front plate gripper system 9.1 in the area of the printing form cylinder periphery 27, the front plate gripping system 9.1 is lowered from the printing form cylinder periphery 27, the printing form cylinder 8 is rotated and the printing plate trailing edge 4.2 is gripped and clamped by the rear plate gripper system 9.2 in the area of the printing form cylinder periphery 27 . The rear plate gripper system 9.2 is then lowered, as a result of which the printing plate 4 is clamped on the printing form cylinder 8.
  • the printing press In normal operation / printing operation, the printing press is geometrically designed in such a way that the target pressure insertion lines 37 of the printing form cylinder 9, the intermediate cylinder 6 and the printing cylinder 14 are brought to coincide with the rotation thereof.
  • this also means that the target pressure application line 37 of the printing cylinder 14 must be in agreement with the pressure application line 19 on the sheet 18 held by the gripper system 5 in order to achieve optimal printing results.
  • the pressure plate 4 is moved in addition to the cylinder movement by the amount of the phase offset P in the pressure plate conveying direction and transferred to the auxiliary gripper system 7 arranged in the intermediate cylinder 6 (FIG. 3).
  • the auxiliary gripper system 7 of the intermediate cylinder 6 can take over the pressure plate 4 in the offset position, since the same is arranged offset in the intermediate cylinder by the amount of the phase offset P.
  • the position of the target pressure application line 37 and the position of the pressure application line 19 are, based on the intermediate cylinder 6, the same and the pressure plate 4 can now be transferred to the plate gripper system 9, ie to the front plate gripper system 9.1.
  • the plate gripper system 9.1 is located above the printing form cylinder periphery 27. After the transfer, the plate gripping system 9 is lowered to below the printing form cylinder periphery 27.
  • the auxiliary gripper system 7 arranged in the intermediate cylinder 6 is brought into an ineffective position below the periphery of the intermediate cylinder after the printing plate has been transferred to the printing form cylinder 8.
  • the movement of the gripper system 5 in the pressure cylinder channel 21 preferably takes place on a radius path 22 through the gear 23; 24; 25; 26.
  • the pressure plate 4 After being taken over by the gripper system 5 of the printing cylinder 14, is moved in addition to the cylinder movement by the amount of the phase offset P in the printing plate conveying direction and transferred to the plate gripper system 9 arranged in the printing form cylinder 8 (FIG. 4).
  • the transfer of the pressure plate 4 by the auxiliary gripper system 7 from the gripper system 5 of the pressure cylinder 14 takes place with a phase shift P, the phase shift P being compensated for by the movement of the auxiliary gripper system 7 and thus creating the prerequisite that the front plate gripper system 4.1 the pressure plate 4 without a phase shift P - Set pressure line 37 and pressure line 19 are the same in relation to the printing form cylinder 8 - can take over.
  • the auxiliary gripper system 7 preferably moves in the intermediate cylinder channel 15 on an intermediate cylinder radius path 28 around the intermediate cylinder center 30 by means of the gear 31; 32.
  • the plate gripper system 9.1 is located above the printing form cylinder periphery 27.
  • the plate gripping system 9 is lowered to below the printing form cylinder periphery 27.
  • the auxiliary gripper system 7 which is movably arranged in the intermediate cylinder 6, the printing plate 4 taken over by the gripper system 5 of the printing cylinder is moved in addition to the cylinder movement by the amount of the phase offset P in the printing plate conveying direction and to the plate gripper system 9.1 arranged in the printing plate cylinder 8 below the printing plate cylinder periphery 27 handed over (Fig. 5).
  • the auxiliary gripper system 7 In addition to the movement in the printing plate conveying direction, the auxiliary gripper system 7 also executes a movement in the radial direction and a pivoting movement.
  • the printing plate 4 conveyed by the gripper system 5 of the printing cylinder 14 via the auxiliary gripper system 7 of the intermediate cylinder 6 is moved in addition to the cylinder movement by the amount of the phase offset P in the printing plate conveying direction (FIG. 6) .
  • the transfer of the pressure plate 4 by the plate gripper system 9 from the gripper system 5 of the pressure cylinder 14 via the auxiliary gripper system 7 of the intermediate cylinder 6 takes place with phase offset P.
  • the phase offset P is eliminated by the movement of the front plate gripper system 9.1 in the direction of pressure plate movement, the front plate gripper system 9.1 preferably using a transmission 34; 35; 36 is moved so that the front plate gripper system 9.1 is controlled after the compensation of the phase offset under the printing form cylinder periphery 27.
  • Flexible printing plates are extracted in the reverse order to the printing plates.

Landscapes

  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP94118916A 1993-12-04 1994-12-01 Dispositif pour l'introduction et/ou l'extraction automatique de plaques d'impression Expired - Lifetime EP0657284B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4341358A DE4341358A1 (de) 1993-12-04 1993-12-04 Einrichtung zum automatischen Ein- und/oder Auszug von flexiblen Druckplatten
DE4341358 1993-12-04

Publications (2)

Publication Number Publication Date
EP0657284A1 true EP0657284A1 (fr) 1995-06-14
EP0657284B1 EP0657284B1 (fr) 1997-03-19

Family

ID=6504176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94118916A Expired - Lifetime EP0657284B1 (fr) 1993-12-04 1994-12-01 Dispositif pour l'introduction et/ou l'extraction automatique de plaques d'impression

Country Status (2)

Country Link
EP (1) EP0657284B1 (fr)
DE (2) DE4341358A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10203059B4 (de) * 2001-02-20 2014-12-04 Heidelberger Druckmaschinen Ag Vorrichtung mit einem ein Greifersystem aufweisenden Zylinder

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206536A (en) * 1987-07-02 1989-01-11 Heidelberger Druckmasch Ag Multi-colour printing machine
DE4220011A1 (de) * 1992-05-16 1993-11-18 Kba Planeta Ag Verfahren und Einrichtung zum automatischen Ein- und/oder Auszug von flexiblen Druckplatten

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206536A (en) * 1987-07-02 1989-01-11 Heidelberger Druckmasch Ag Multi-colour printing machine
DE4220011A1 (de) * 1992-05-16 1993-11-18 Kba Planeta Ag Verfahren und Einrichtung zum automatischen Ein- und/oder Auszug von flexiblen Druckplatten

Also Published As

Publication number Publication date
DE4341358A1 (de) 1995-06-08
EP0657284B1 (fr) 1997-03-19
DE59402137D1 (de) 1997-04-24

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