FR2526369A1 - COMBINED HUMIDIFICATION AND VERNISSAGE DEVICE - Google Patents

Abstract

A. COMBINED HUMIDIFICATION AND VARNISHING DEVICE. B. CHARACTERIZED IN THAT A VARNISH APPLICATION ROLLER 7 IS ASSOCIATED WITH THE WETER ROLLER 5 OF THE HUMIDIFICATION DEVICE 1 TO 5, 12, THIS APPLICATION ROLLER CAN BE PLACED AGAINST THE RUBBER ROLLER 10. C.L THE INVENTION RELATES TO PRINTING MACHINES.

Description

"Combined humidification and varnishing device"

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  The subject of the invention is a

  humidification and varnishing machine for sheet printing machines. Recently, there has been increasing demand for higher quality printed products,

  bright and free of stains.

  ink on the back of the printed product in sheet-printing machines,

  the powder initially on each individual printed sheet

  duellè before the deposit in starting position.

  The disadvantage of dusting is however

  that the printing product is taken as sand.

  In addition, with an appropriate paper, a significant portion

  color and paper gloss is removed.

  To operate without powder, it was transmitted, using the inking mechanism, an appropriate varnish on the

  printing plate and so, through the white

chet, on the plate cylinder.

  The disadvantage of this solution is that the

  printing varnish must go a long way in

  towards the inking mechanism and therefore can not be

  evaporation because, otherwise, the varnish would dry

in the inking mechanism.

  To shorten this long path, we already know a varnishing device for printing machines 2.- (DE 2020 584), this special varnishing device, which is constituted by a plunger turning in a container, a squeezing roller and a roller printer being applied to the rubber roller of the last printing unit Due to the necessary mounting volume for such a coating device, the mounting location must be in front of the printing area of the rubber roller and the plate cylinder,

  so that the path of the varnish to the location of im-

  pressure is still relatively long.

  In addition, following a second form of

  to avoid staining of the leaf

  deposit, the humidification device of the group of impres-

  which then does not carry ink is arranged in

as a varnishing device.

  The disadvantage of this varnishing device

  ge is that the haumidification device can not be used

  only to apply lacquer to the cylinder

  plate The path of the varnish is then even longer than

in the first case.

  Both varnishing devices take up space, require a lot of material or are suitable

  not for all fast-drying varnishes.

  The object of the invention is to create a combined moistening and varnishing device,

  with simple means, to increase the value of

of the printing machine.

  At the base of the invention is the problem

  to create a combined humidification and cooling device

  which can be applied, both for humidification on the plate cylinder qi 2 as a coating device on the rubber roller

or the plate cylinder.

  To this end, the invention relates to a device

  The invention is characterized in that a varnish-coating roll 3 is associated with the moistening-device moistening roller, which applicator roller can be arranged against the rubber roller. of the varnish, the inking cylinder is provided with cups. The invention will be better understood with regard to

  the following description and accompanying drawings representing

  an exemplary embodiment of the invention, drawings in the-

what:

  Figure 1 shows a device

  humidification and varnishing to perform

  humidification and varnishing on the cylinder

plate,

  FIG. 2 shows the device according to

  me to the invention moved to perform the vernissage on

the rubber roller.

  As seen in Figure 1, a cylinder

  1 is in constant contact with the human agent.

  midifier contained in humidifier tray 2.

  According to the printing mode, the moisturizing agent

  may be replaced by a printing varnish or

  a varnish of water box, known in a general way.

  Like a gravure printing cylinder

  vure, the feed cylinder 1 is provided with cups

  or engravings On the feed cylinder 1 is dis-

  placed a squeegee 12 or a metering cylinder 13 rotating in

reverse.

  The supply cylinder 1 is connected to a transfer roller 3 by a geometrical connection constituted by a gear transmission. The transfer roller 3 is connected, by sliding contact, to the friction cylinder 4 and the latter is in touch

  with the plate cylinder 6, through

  of the two wet rollers 5, 5 '.

  A rotating varnish application roll 7, 4 -

  mounted and adjustable in a known manner, is arranged on the wheel.

  In accordance with FIG. 2, the coating roller 7 is dimensioned to be able to be

  applied to the rubber roller 10 when the rollers

  the dampers 5, 5 'are removed by means of the plate cylinder

  6, the four ink application cylinders 8 are dis-

  With the two ink transfer cylinders 9, the plate cylinder 6 is connected, in a known manner and via the rubber roller 10, with

the impression cylinder 11.

  The mode of operation of the device

  above is: Feed cylinder 1 is driven

  by a separate motor in the opposite direction to the direction of the

  the surface of the watch is coated with moistening liquid, printing varnish or

varnish of water box.

  Since the feed cylinder 1

  cups, you can always transmit enough

  moistening agent or printing varnish.

  By means of the squeegee 12 or the metering cylinder 13

  In the opposite direction, the human agent is removed by scraping.

midification in excess.

  The following transport is ensured by means of the transfer roller 3 driven in geometric connection and then up to the damping rollers 5, 5 'applied to the plate cylinder 6, the application roller

  varnish 7 being driven or turned off.

  If we now have to paint

  wise with fast-drying varnish, that is to say to reduce as far as possible the distance to the printed product,

  apply the varnish application roller 7 to the roller

  As shown in FIG. 2, the roller 5 is separated for this application operation.

  dampener 5 'of the plate cylinder 6 The wet roller

  they are driven as a smoothing roller or disassembled.

  The stroke of the plate cylinder 6 is

  glue by the rubber roller 10 and, to pocket the accumulation of varnish on the application rolls

  of color 8 these are separated from the cylinder bearing

plate 6.

6.

R E V E ND I C A T IONS

  1. Combined moistening and varnishing device for printing machines, the dep t 8 t of varnish

  taking place by means of the humidification device,

  characterized in that a varnish application roll (7) is

  associated with the moistening roller (5) of the moistening device

  cation (1 to 5, 12, 13), this application roll can

  be placed against the rubber roller (10).

  2. A combined humidifying and varnishing device according to claim 1, characterized in that

  the feed cylinder (1) is provided with cups.