EP0253242A2 - Appareil et procédé de montage de plaques d'impression sur des cylindres - Google Patents

Appareil et procédé de montage de plaques d'impression sur des cylindres Download PDF

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Publication number
EP0253242A2
EP0253242A2 EP87109640A EP87109640A EP0253242A2 EP 0253242 A2 EP0253242 A2 EP 0253242A2 EP 87109640 A EP87109640 A EP 87109640A EP 87109640 A EP87109640 A EP 87109640A EP 0253242 A2 EP0253242 A2 EP 0253242A2
Authority
EP
European Patent Office
Prior art keywords
cliché
plate
transparent
bearing plate
support
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.)
Withdrawn
Application number
EP87109640A
Other languages
German (de)
English (en)
Other versions
EP0253242A3 (fr
Inventor
Angelo Bartesaghi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0253242A2 publication Critical patent/EP0253242A2/fr
Publication of EP0253242A3 publication Critical patent/EP0253242A3/fr
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention generally relates to the printing field, for instance the multi-color printing and more particularly to an apparatus and method for setting clichés on printing rollers.
  • the cliché setting operation is presently performed by different procedures, among which here is mentioned the one consisting in having a bearing plate, preferably provided with a screen, where the image to be printed is placed, preferably on tracing paper; the cliché, already with the image to be reproduced corresponding to the one outlined on the tracing paper, is then placed on it, said cliché being preferably a folding sheet made of plastics material.
  • a printing roller provided with a biadhesive film is passed on the plastics cliché, in a way that the cliché winds on said roller and remains in position thanks to the adhesive.
  • the superimposition of the two images is checked again, namely the image on the screen and the one on the cliché, by rolling the roller on the screened bearing plate and checking on the same, by means of a mirror, whether the superimposition of the two images is still correct. Said procedure is performed for each printing roller to be used in the multi-color printing of the same image.
  • An object of this invention is to eliminate the source of said setting errors and the difficult of checking through the mirror, by providing a simple and economic apparatus, easy to use for setting clichés on printing rollers.
  • Another object of the present invention is to provide an apparatus of the above mentioned type, wherein the setting operation can be repeatedly performed with simple mechanical means, without requiring the use of a checking mirror.
  • Still another object of the invention is to provide a process for setting clichés on printing rollers, which can be carried-out with the apparatus according to the invention.
  • the support of the transparent bearing plate consists of a frame provided with columns sliding in relate guide bushings, the columns being connected at their free end to said means for performing the vertical movement of the support in both directions.
  • said means to guide the saddle in its horizontal crosswise movement are in the form of longitudinal sliding guides integral with the apparatus frame.
  • said means to perform the reciprocating vertical movement of said support comprise a control lever and a leverage for each support column, lever and leverages being mechanically connected to one another in a way as to transmit the movement of said control lever to the transparent plate support.
  • the invention also relates to a method for setting clichés on printing rollers with an apparatus as above stated and wherein is applied a check image onto said bearing plate, characterized in that it comprises the following steps: - rotate by 180° the bearing plate around its hinge axis so as to expose its lower surface; - place, in correspondence with the check image, a cliché with the image to be printed, shaped as a plastic sheet or the like, in a way as to superimpose the two images, and fix it provisionally in position; - rotate backwards by 180° the transparent bearing plate with the image and cliché fixed on it, so that the latter is under the plate; - lower the bearing plate with the cliché fixed on it as far as to reach a tangency with the printing roller; - slide the printing roller under the cliché in a way that the latter winds around the roller, be fixed to it by an adhesive and detaches itself from the transparent plate; and - slide the roller onward and backward under the bearing plate with the image fixed to it in order to check by direct viewing and/or through magnifying means
  • the apparatus for the alignment of clichés on printing rollers, comprises a base 2 supported by adjustable feet 3 and having on top two longitudinal columns 4 which serve as sliding guides for a saddle 5 provided with a handle bar 6 and having two side seats 7 to freely receive pivots 8 of a printing roller 9 designed to carry a cliché.
  • the saddle 5 presents on its two sides bushes 10 designed to slide on said guide columns 4.
  • base 2 On the top wall of base 2 four sliding bushes 11 are fixed, preferably on the four corners of base 2, in order to receive four sliding small columns 12.
  • the columns 12 are fixed to the four corners of a support frame 13, the open space of which houses a bearing plate 14, made of a transparent material and provided with a printing screen, in a traditional way.
  • the bearing plate 14 serves in this case as a lid and is fixed to the support frame 13 by means of a rim 15 which, as shown in figure 4, surrounds the bearing plate 14 and is fixed to hinges 16 which connect the same to a side of support frame 13, in a way as to allow the plate 14 to rotate around an axis 17 (see reference 14 ⁇ in figure 3); therefore the bearing plate 14 can take a closed position, as shown in the figures, and an open position (when rotated by 180°), in which its lower surface 30 is upturned.
  • said rim 15 On the plate side opposite to the one carrying the hinges, said rim 15 has a handle 18 for opening and closing the lid formed by said plate 14, as well as a stop area on frame 13 to define the said plate closed position.
  • Bushes 11 extend inside the base 2 and the ends of columns 12 which, below bushes 11, have a section with larger diameter 19 with two pivots 20 aligned and protruding perpendicularly to the axis of the related column 12. Said pivots 20 are able to engage in a slot 21 provided in a forked end of a one-armed lever 22, the other end of which is fixed to a shaft 23 rotatably mounted crosswise to the base 2.
  • the shafts are two in number and therefore each of them bears two levers 22, each lever being positioned in correspondence with one of the columns 12 to transmit its motion to the same in both vertical directions, in order to lift or lower the transparent plate 14.
  • a third shaft 24 is placed between said two shafts 23 and can be freely rotated on the base 2, said shaft 24 carrying at one of its ends a control lever 25, positioned out of the base 2.
  • Another forked lever 26 is fixed in the middle of shaft 24 and is engaged by means of slots 29 in pivots 27 provided on a longitudinal rod 28 connecting the levers 26 so to allow transmission of the rotary motion from the control lever 25 to shafts 23 through the shaft 24.
  • the rotation in one direction of the control lever 25 lowers the transparent plate 14 and the rotation in the opposite direction raises the plate 14.
  • the apparatus works in a very simple way.
  • the cliché 31 is fixed on plate 14, for instance by an adhesive tape, and the plate 14 is newly rotated into its closed postion, inside the support frame 13; in this way the cliché 31 is now under the plate 14 and the superimposition of the two images can be checked again without using mirrors.
  • the alignment is checked again by sliding several times the saddle 5 onwards and backwards and stopping it in correspondence with the image fixed on the screen.
  • the roller 9 with cliché fixed on it is removed from the saddle 5 and a new roller without cliché is mounted to repeat the cycle of operations as above described for a different color.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
EP87109640A 1986-07-15 1987-07-04 Appareil et procédé de montage de plaques d'impression sur des cylindres Withdrawn EP0253242A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2113086 1986-07-15
IT21130/86A IT1213302B (it) 1986-07-15 1986-07-15 Apparecchio per la messa a registro di cliche'su rulli da stampa e relativo procedimento

Publications (2)

Publication Number Publication Date
EP0253242A2 true EP0253242A2 (fr) 1988-01-20
EP0253242A3 EP0253242A3 (fr) 1989-08-30

Family

ID=11177188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109640A Withdrawn EP0253242A3 (fr) 1986-07-15 1987-07-04 Appareil et procédé de montage de plaques d'impression sur des cylindres

Country Status (2)

Country Link
EP (1) EP0253242A3 (fr)
IT (1) IT1213302B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5519491A (en) * 1991-10-31 1996-05-21 Leica Ag Process for measuring the inclination of boundary areas in an optical system using interferometry to extract reflections from disturbance-generating boundary areas

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1256934A (fr) * 1960-05-13 1961-03-24 Orchard Paper Company Procédé et appareil pour le montage des clichés sur les cylindres d'impression
US4449452A (en) * 1982-05-28 1984-05-22 Rapid Packaging Services Pty. Ltd. Rapid plate mounter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5519491A (en) * 1991-10-31 1996-05-21 Leica Ag Process for measuring the inclination of boundary areas in an optical system using interferometry to extract reflections from disturbance-generating boundary areas

Also Published As

Publication number Publication date
EP0253242A3 (fr) 1989-08-30
IT1213302B (it) 1989-12-20
IT8621130A0 (it) 1986-07-15

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