FR2501586A1 - ARRANGEMENT OF ROTARY PRINTING DEVICES FOR THE COMBINED OFFSET PRINTING OF PRINTED TITLES - Google Patents

Abstract

IN THE ROTARY ASSEMBLY, A CLICH HOLDER CYLINDER 23 CARRYING OFFSET PRINTING PLATES 24, 26, 27 COOPERATES WITH TEMPLATE ROLLS 28, 29, 30, 31 EACH ASSOCIATED WITH AN INKING DEVICE FOR INKING THE VARIOUS PLATES D FOR PRINTING, AN OFFSET PRINTING RUBBER CYLINDER 8 IS ASSOCIATED WITH THE PRINTING CYLINDER 23 TO ACHIEVE A HIGH QUALITY POLYCHROME PRINTING ON PRINTING MEDIA, FOR EXAMPLE TITLES OR VALUES PRINTED WITH BACKGROUND.

Description

1. The present invention relates to machine installations

  rotary printing machines for offset printing

  combination of printed titles or values, including a cylinder

  dre of rubber and a plate cylinder supporting typographic plates, with each plate cylinder being

  associated with a plurality of divided template rollers, a

  positive inking and a wetting device being associated

  ciés to each template roll. This type of installation can be used for printing single sheets or

  strips of paper in a continuous printing system.

  Rotary printing devices for printing

  Combination is known in the art of indirect letterpress or relief printing. In this type of machines

  several plate cylinders supporting ty-

  are arranged around an offset cylinder in

  outchouc. Each plate cylinder is associated with a

  positive inking. As a result, the rubber cylinder re-

  receives cliché cylinders of different loads

  colors forming a poly- film on the rubber cylinder

  chrome defining a segmented pattern.

  US Patent No. 3,390,631 also describes rolls called "template rolls"

divided and elastic.

  The object of the present invention is to provide a 2.

  installation for combined offset printing allowing printing

  prevail over titles or securities one or more lines

  polychromes forming a security fund for these securities, these

  printed genes with non-discontinuous and non-offset variations of different colors. To do this, according to a characteristic of the present invention, around each plate cylinder are arranged several driven template rollers, divided into

  sectors, transferring the colors to the printing plates

  Zion of the plate cylinder, an inking device being associated with each template roller, to the plate cylinder,

  colored according to sectoral zones, being associated a cy-

  rubber liner arranged to transfer the poly-

  chrome gathered on his rubber fabric (s) on the

print media to print.

  This arrangement allows, on the one hand, to print without

  no shifting of lines or surfaces with

  rations of discontinuous colors, in a printing process

  combined offset offset. The device thus makes it possible to overcome

  chir of color collecting cylinders to collect in

  first the different colors and transfer them

  continued on the plates or typographical shots. Else

  On the other hand, the device makes it possible not to have recourse to more

  several plate cylinders to print a network background

  of lines, thus avoiding adjustments or parengonages dispense

  gods and long and an adaptation of location of the various cli-

  printing vouchers. We can thus use offset plates

  to obtain patterns printed in relief. The lar-

  lines on the printing plates are retained

  when transferred to the print media sheets.

  The outer contours of the lines and flat are clearly delimited and have a uniform shade. In this way, the problems of color inconsistency and crushing

  edges, usually encountered in printing techniques

  pressure in direct relief from a rigid plate on a

  print media are avoided.

  In addition, with the system according to the invention, at

  rubber cylinder acting as a counter cylinder

  3. reaction can be associated with a plate cylinder which can

  have several printing plates inked by the cy-

  lindres-gauges, thus allowing to obtain simultaneously

double-sided printing.

  Other features and advantages of the present

  The invention will emerge from the following description of a mo-

  of realization, given by way of illustration but not at all

  limitative, made in relation to the attached drawing, on the-

  which: 0 The single figure shows schematically, in side view, a rotary assembly for combined printing of

  sheets according to the invention associated with another printing station

offset offset.

  As shown in the drawing, the sheets to be im-

  primer 2 are transferred, in a manner known per se, by

  conveyor belts (not shown) from a dispo-

  sheet presentation sitive 1 to a stop drum 3 associated with a transfer drum 4, up to (in the specific case of individual sheets to be printed), a device

  leaf taker, known per se and also not shown

  tea, from an offset rubber cylinder 8.

  The rubber offset cylinder 8, on which are

  - arranged several rubber mats 19, 21, 22 of the length -

  printing plates, cooperates with a cylinder

  te-clichés 23 on its periphery one or more

  offset printing plates 24, 26, 27. The printing plates

  offset offset 25, 26, 27 are inked by gaba-

  rits 28, 29, 30, 31 elastic and divided into sectors, as is known in the art. For inking cylinders

  templates 28, 29, 30 and 31 are provided with devices

  offset reamers 33, 34, 36 and 37, each gauge cylinder 28, 29, 30 and 31 being associated with an inking device 33, 34, 36 and 37 each including a wetting device 5, 6, 7

  and 10, respectively. The circumferences of the cylinder

  outchouc offset 8 and the plate cylinder 8 are identified

  and correspond to an integer multiple of the circumference-

  this of the template cylinders 28, 29, 30 and 31, the circumferen-

  these template cylinders 28, 29, 30 and 31 being, as for 4.

all of them identical.

  The different cylinders 8, 13, 23, 14, 16, 17, 18 and 28, 29, 30, 31, the inking devices 33, 34, 36, 37, and the drums 3 and 4 are driven by means of mechanisms with gear known in itself by a main motor 32. The wetters 5, 6, 7 and 10 are, as for

  them driven by a separate electric motor.

  Print media, i.e. sheets

  les to be printed 2, can be simultaneously printed simultaneously

  reverse side being inserted between the offset rubber cylinder 8 and another adjacent offset rubber cylinder 13, forming a feedback cylinder as shown in the drawing. In this case, the other rubber cylinder 13, also covered with one or more rubber mats 9, 11, 12 extending over its entire circumference, or each over part of its circumference, respectively, is printed or colored temporarily by the offset printing plates 38, 39, 4.1, 42 of adjacent offset printing cylinders 14, 16, 17, 18. The offset printing plates 38, 39, 41, 42 are inked with associated individual inkers 43, 44, 46 and 47. The rubber cylinders 8 and 13 all have

  two the same circumference. The same is true for cylin-

  dres superimposed offset plate holders 14, 16, 17 and 18. The cir-

  conference of the rubber cylinders 8 and 13 is thus also

  also an integer multiple of the circumference of the cylinders

  offset plates 14, 16, 17 and 18.

  It is also possible to have, symmetrical-

  meet with respect to cylinders 8 and 23 with their template cylinders 28, 29, 30 and 31 and their inks 33, 34, 36 and 37,

  similar cylinders 8 and 23 (but this time without

  sitive taker) associated with the template cylinders 28, 29, 30 and 31 and the inks 33, 34, 36 and 37. With this arrangement of cylinders, the printing medium, that is to say a sheet 2, could be printed simultaneously on both sides between

  matched offset rubber cylinders 8, 8.

  The printed sheets 2 are then transferred to a sheet receiving device, for example by a chain transfer device. In the case where the printing medium is in the form of a continuous strip of paper, the strip, once printed, can be conveyed

  in known manner up to a transverse cutting device

  the to be divided into sheets which will be deposited in-

  continued in the sheet recovery device. Although the present invention has been described in relation to a particular embodiment, it is not limited thereto but is on the contrary liable to modifications and variants which will appear to humans.

art.

6.

Claims (4)

  1 - Rotary machine printing set for printing   combined pressure of titles printed in offset, characterized in that   includes a plate cylinder (23) on which are   offset printing plates (38, 39, 41, 42) around which are arranged several template rollers. driven, divided into sectors (28, 29, 30, 31) transferring the colors   on the offset printing plates (24, 26, 27), each roll   the water template (28, 29, 30, 31) being associated with an inking device with the plate cylinder (23) -being associated with at least a first offset rubber cylinder (8) carrying at least one rubber screen (19, 21, 22) inked according to sectoral zones, to transfer the polychrome printing image collected on the carpet. rubber on a printing support to be printed (2). 2 - assembly according to claim 1, characterized in that it further comprises a feedback cylinder   (13) cooperating with the rubber cylinder (8).   3 - assembly according to claim 2, characterized   in that the feedback cylinder (13) is made up of   killed by another rubber cylinder (13), comprising a rubber mat extending substantially over the whole   of its circumference or several rubber mats stretch   each one following a part of its circumference.   4 - assembly according to one of claims 1 to 3,   characterized in that the other offset rubber cylinder (13) is associated with a plurality of plate cylinders (14, 16, 17, 18) carrying offset printing plates (38, 39, 41, 42) each cooperating with an inking device (43, 44, 46, 47).   - Assembly according to claim 1, characterized in that the first rubber cylinder (8) is associated with   second rubber cylinder (8), a second cylinder   printing plates (23) according to sectors and carrying offset printing plates (24, 26, 27) cooperating with the second rubber cylinder (8), these offset printing plates (24, 26, 27) being inked by template rolls 250158 :: 7.   elastic divided into sectors (28, 29, 30, 31) and associated   each with an inking device (33, 34, 36, 37) and   a wetting device (5, 6, 7, 10).