FR2501583A1 - ROTARY PRINTING MACHINE ASSEMBLY FOR THE COMBINED 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, TO INK THE DIFFERENT PLATES PRINTING, AN OFFSET 8 RUBBER PRINTING CYLINDER COOPERATING WITH A 23 PRINTING CYLINDER 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 a set of printing machine

  rotary for combined printing

of printed titles.

  More specifically, the present invention relates to a set of rotary printing machine for

  combined printing of titles printed by internal tygography

  direct comprising an offset rubber cylinder and a plate cylinder carrying letterpress plates, several template rollers divided into sectors associated with each plate cylinder, and an inking device

  for each template roll. This set of rotary machine

  tive can be used for printing individual sheets

  tape or paper strips in a facility

continuous rotary printing.

  We already know sets of im-

  rotary pressure for combined printing by indirect letterpress, in which several printing cylinders carrying letterpress plates are arranged around

  of a rubber offset cylinder. Each cylinder

  clichés is associated with an inking device. The rubber cylinder receives patterns from these plate cylinders

  of different colors forming on the rubber cylinder

  chouc, a polychrome film which is then transferred to the

print media.

  U.S. Patent No. 3,190,631 described by ail-

  2. their rolls called elastic and divided "templates"

into sectors.

  The object of the present invention is to provide a

  printing system for individual combined printing

  rect relief patterns to print one or more multicolored lines forming security background, for titles or values printed, these lines being printed without

  discontinuities of colors and without shifts.

  To do this, according to a characteristic of the present invention, to the following ink-holding cylinder

  of the determined sectors, is associated a cylinder of rubber

  chouc wearing on its rubber mat (s) polychrome image patterns combined to be transferred to a

print media.

  With this arrangement, the lines or flat can be printed without discontinuities or offsets between the

  different colors by the combined printing process ty-

  indirect population. It is possible to get rid of a cylinder for collecting combined colors, first collecting the different colors and then transferring them

  on the printing plates. On the other hand, he was no longer born

  stop providing several plate cylinders for printing a background patterned lines, which allows

  in addition to avoiding the usual calibrations and adjustments required

  gods and expensive individual printing plates. It is thus possible to use letterpress or relief printing plates to obtain a homogeneous image pattern having the qualities of dry offset printing. The width

  lines on the letterpress plate are kept sensitive-

  unchanged when transferred to the print carrier

  pressure. The external contours of the lines and the flat lines

  are clearly demarcated, and are characterized by a thick-

  homogeneous ink, that is, a uniform shade. In this way the problems of non-uniformity of the colors and of crushing of the edges usually encountered in the techniques of printing in relief diiect from a rigid printing plate on a printing medium, are thus avoided. 3. In addition, with the system according to the invention, the offset rubber cylinder acting as a cylinder

  counter-impression can be associated with another cylinder

  te-clichés which can include several printing plates inked by template cylinders, thus allowing

  hold two-sided printing simultaneously.

  Other features and benefits of the

  present invention will emerge from the following description

  of an embodiment, given by way of illustration but

  in no way limiting, made in relation to the drawing an-

  attached, in which: The single figure schematically represents, in side view, a rotary assembly for combined printing

  sheets according to the invention associated with another printing station

offset pressure.

  As shown in the drawing, the sheets to be printed 2 are transferred, in a known manner, by conveyor belts (not shown) from a sheet presentation device 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 dis-

  positive leaf taker, known per se and also not

  shown, of an offset rubber cylinder 8.

  The rubber offset cylinder 8, on which are arranged several rubber mats 19, 21, 22 of

  the length of the printing plates, cooperates with a cylinder

  dre cliché 23 bearing on its periphery one or more

  offset printing plates 24, 26, 27. The plates

  offset printing 25, 26, 27 are inked by cylinders

  dres templates 28, 29, 30, 31 elastic and divided into sec-

  teurs, as is known in the art. For the ink

  age of the template cylinders 28, 29, 30 and 31 are provided

  offset inking devices 33, 34, 36 and 37, for each cylinder

  dre gauge 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 offset rubber cylinder 8 and of the cylinder

  8 pictures are identical and correspond to a multiple

  4. third of the circumference of the template cylinders 28, 29, 30 and 31, the circumferences of the template cylinders 28, 29, 30 and

  31 being all identical.

  The different cylinders 8, 13, 23, 14, 16, 17, 18 and 28, 29, 30, 31, the ink devices 33, 34, 36,

  37, and the drums 3 and 4 are driven, by means of

  diary of known gear mechanisms, by

a main engine 32.

  The print media, i.e. the sheets to be printed 2, can be printed simultaneously

  double-sided being inserted between the rubber cylinder

  offset offset 8 and another offset rubber cylinder

  adjacent 13, forming a feedback cylinder as re-

  shown in the drawing. In this case, the other rubber cylinder 13, also covered with one or more belts

  of rubber 9, 11,12 extending over its entire circumference-

  this, or each on a part of its circumference, respecti-

  temporarily printed or colored by the placemats

  offset printing cylinders 38, 39, 41, 42

  adjacent offset plates 14, 16, 17, 18. The image plates

  offset pressure 38, 39, 41, 42 are inked by inkers

  associated individual 43, 44, 46 and 47. The cylinders in ca-

  outchouc 8 and 13 both have the same circumference. It-

  the same is true for the super-offset offset plate cylinders

  ses 14, 16, 17 and 18. The circumference of the rubber cylinders

  chouc 8 and 13 is thus also an integer multiple of the circumference of the offset plate cylinders 14, 16, 17 and 18.

  It is also possible to have, symmetrical-

  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 inkers 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 the

  matched offset rubber cylinders 8, 8.

  5. Although the present invention has been described in relation to a particular embodiment, it is not limited thereto but is on the contrary subject to modifications and variants which will appear to those skilled in the art. 6.

Claims (1)

CLAIMS l - Combined rotary machine printing unit for indirect letterpress printing of printed titles, comprising a plate cylinder provided with letterpress printing plates and several driven template rollers divided into sectors, arranged around the plate cylinder for inking the type plates, an inking device being associated with each template roller, characterized in that it comprises at least one rubber cylinder (8) associated with the plate cylinder (23) inked according to sectoral zones , the rubber cylinder (8) carrying at least one rubber mat (19, 21,   22) to transfer the collected full color print image   blocked on its surface on a printing support to be printed (2).   2 - assembly according to claim 1, character-   in that it includes a counter-impression cylinder   (13) cooperating with the rubber cylinder (8).   3 - assembly according to claim 2, character-   dried in that the counter-impression cylinder (13) is   made of another rubber cylinder comprising a rubber mat extending substantially over its entire circumference or several rubber mats (9; 11; 12)   each extending along a part of this circumference.   4 - assembly according to claim 3, character-   in that the other rubber cylinder (13) is as-   associated a plurality of plate cylinders (14, 16, 17, 18) carrying offset printing plates (38, 39, 40, 41, 42) and each cooperating with an associated inking device (43, 44, 46, 47).   - An assembly according to claim l, character-   dried in that the first rubber cylinder (8) is associated   a second rubber cylinder (8), a second cylinder   dre cliché (23) insertable according to sectors and port   both offset printing plates (24, 26, 27) cooperating   with the second rubber cylinder, these printing plates   offset offset (24, 26, 27) being inked by rollers   elastic bars divided into sectors (28,29,30, 31) each associated   to an inking device (33, 34, 36, .37).