DE2132979C3 - Photo printing machine for the production of rotary photocopies according to the diffusion process - Google Patents

Description

3. Photodmckmaschine according to claim 1, there- superior method.

characterized in that the paint suction device, although the paint transfer described above

direction (16, 17, 18) has a nozzle, which with supply process with regard to Wirtscnaftlichken

is filled with a porous material. As and luster is superior to the color obtained, it has

4. Photo printing machine according to claim 1, but so far not established in technology, characterized in that the nozzle with a since the implementation of this method is a sieve-like Material and a porous material chen required labor and time and there is filled. this method is unsuitable for mass production

30 net.

The color transfer process has usually been carried out by hand. It was already one

The invention relates to a photo printing automatic device for the production of tech machines for the production of rotary photocopies Nicolor running films known, in which a web with Pho- 35 stretched on driven drums, a plastic photographic plate with a track of a plates, inking units and counter-pressure elements. Faib recording material is brought together, where-

In the photo printing diffusion process, a color receiving material is used in the same way as the art color image transferred to a carrier material, with a photographic plate with precisely aligned perforations Photo plate having a layer which is provided. This kind of automatic color-color liquid absorbed in a gelatin layer, 40 transfer machines will be used for duplicating colored and then used the colored running film on the photo plate. With this machine existing monochromatic color image on a carrier mat- the coloring of the photographic plate takes place in that rial is transmitted, which absorbs the color, the path of the perforated photomend Has layer. The recording material is made flat by a color liquid and then in hereinafter referred to as "color receiving paper" or "Pa-45 a wash bath. In contrast, will pier «. in the manual process, in which the photo plate

Generally, one printing set is composed of three sheet-shaped, sheet-shaped photographic plates

Place the photo plates corresponding to the color separations in a washing liquid for 5 to 10 minutes.

whereby these photo plates are both positive and dipped and put into the next solution by hand.

can also be provided for negative work. 50 brings.

In one such set of extract photographic plates, British Patent 17,278 A.D. 1912

are used one after the other, an offset printing machine is described for each

Transferring the separation color image onto a paper and rather dampening solution and ink onto the printing form

so as to obtain a multicolored image 7u. The load-bearing cylinder is sprayed on and the paint over-

it is necessary that the single color separation color images 55 shot is sucked off. For feeding the color

all are congruent, so that a sharp more- a nozzle could also be used, as in

colored image is created on the paper. GB-PS 516 716 for a gravure printing machine

The practiced color transfer process includes is written, which is a parallel to the axis of the cylinder

the following stages: the extending slot and a pumping device

1. Manufacture of photographic plates in which one has 60.

colored photo plates from a colored slide

positive or a colored negative film, printing ink is only applied to the forme cylinder.

will; and the excess paint is removed. Dei

2. Inking, in which the photographic plates are in- Distance between the spraying device dei to be colored; 65 printing ink and the vacuum working

3. Washing up, in which the excess suction device may therefore be small.

Paint is removed from the photographic plates, and in contrast to that described above

4. Transfer, in which the photographic plate is transferred to an offset printing machine with a color transfer

eunes method requires a certain period of time, so that during the operation of the above-described

* H the color sufficient in the device will be the gears 11 and 12

r latin layer can penetrate. To this time and the drums 1, 2 and 3 in the direction of the m

Anne z "reach, the distance between the arrows shown in Fig. 1 must be driven so that the

! For the paint feeding device and the paint suction 5 with the illustrations to be provided paper4 according to

! • Direction to be great. In addition, it is also necessary to move the representation shown in FIG. 1 upwards.

j ° Vch that the color receiving paper and the photo is promoted and that on the drums 1, 2, 3

latte transferred color images to the paper 4 during a certain period of time

ζ lie in touch to be satisfactory.

Transfer of the into the gelatin layer of the photo. A photo plate is on each drum 1, 2, 3 Penetrated paint on the paint receptacle stretched. It extends almost over the circumference to allow anier. the drum. The photo plate is supplied with color,

^The object of the invention is to provide one which has an extremely low viscosity compared to a photographic printing machine for rotary photocopying with ordinary letterpress or offset printing ink. The previously effortless color transfers to color are fed to the photographic plate in such a way that they can be obtained on KmeDapier. the surface of the photographic plate flows. The opening

ⁿ According to ^the invention, a Photodruckma- the Farbzuführdüse 13, 14, 15 has a sufficiently chine for preparing rotation photocopies large width with respect to the width of the Papiers1 4. • tup driven drums spanned photon the photographic plate absorbs the color to the with the . "Latte inking units and counterpressure elements soaked in color adhere to the photoplate during rotation, which is characterized in that the inking of the drum 13, 14, 15 reaches the device for re-feeding nozzles for low-viscosity ink and color recovery of the ink. The absorption of the devices for sucking off excess paint takes place in a gelatin layer that is to be transferred to each drum and that the lowering image. The excess color, which was not absorbed by the photon at a distance from one another, is sucked off by rolling on each drum and a suction pump is provided. Then the upper

With the devices according to the dependent claims of the photographic plate surface a washing liquid supplied _h ™ 'coloration of photographic plates, wherein, leads to the adhesive on the surface of the photographic plate at-Sfprschüssiee ink from the surface of the photographic color to remove. The paper 4 is removed with S, a beautiful color image can be achieved without the help of the pressure rollers 5 to 10 with the Seier surface. Also the color of the photographic plates can be brought into contact, so that the w ahermaliee using recovered advertising paper 4 together with the on the drum 1, i, A, a photographic plate located abermalig β is transported further.

The photo-printing machine according to the invention coming into contact with the paper 4 d ^"p hotoplatten be-

^ sy ^{drawings closer 35} "b ^^^

ffi ^ Rare view of a pho- ^ ÄÄ ^ Ä

F ™ g2'S! Side view of part of the photo- the color image on the photo plates on the paper 4

^d Ti ^k _B ^m ? ^C and ^e 3b partially sectioned side view- ⁴ ° "In" fg "2 is the device for the feed

te «ine VonSLg for the recovery of the color of the color and the device Jr« #j

ten tion of color on an enlarged scale oargesiem.

Fig. 4 is a side view of a modification of the drum 1 is ^a % ^{ph <} f Ρ ' ^β "5 .. ^ ° _η Α

nu ♦ Ti wWmasrhine 45 tensioned. The paint comes from the paint feed nozzle

works, which the Pa _P ier4 to subsequent sales 55 ^ kge ^ jnuiJg J « ^ar ^ . _{χ ver] aufen} .

driving stages or to the drying time. The ^ ^e "Vu," had the supply or Wicdergewin reference number 11, ^^ ctaMn.to. The J _? ^ «/ ^H » t and jjjs supply ^ ^ ^ ^

Comb with gears, which on one side or c recovery of the color can also be a

Drums 1, 2 and 3 are arranged so that the J / "^ r" Sl η lie in one line

SSSSSSSTESi ° * p% »^ Ä

Drums 1, 2 and 3 with the up. "ch-used ^ α

3S5pi ΐ

Numeral 162 shows one with a vacuum wave connected section. The vacuum source is connected to a paint container, Fig. 3b shows another embodiment in which a porous material 163 is filled in the nozzle part. That Reference numeral 164 denotes a screen material, which together with the porous material 163 in the nozzle part is used.

Even if in FIG. 1 shows an embodiment of a photo printing machine for the transfer of If several colors are shown, the photo printing machine can also be designed for inking a photo plate with only one or with more than 3 colors will.

The method of operation of the device is described below using the exemplary embodiment, for example explained in more detail.

A photographic plate carrying a relief image is placed on a drum with a diameter of 141 mm attached. In the dry state, the photo plate is at most 5 μm thick. The: drum is moving at a speed driven by 0.7 rpm. The paint is applied to the surface of the drum, being the following 3 types of combinations of nozzles for supply and recovery of the 5 color can be used. The supply pressure of the paint is 0.5 m water column, the supply amount is 0.8 l / min, the distance from the opening of the paint supply nozzle to the nozzle of the paint suction device along the circumference of the drum, d. H. the

ίο inking distance is 150 mm. With the paint suction device a vacuum source is connected.

The results are determined by the optical reflectivity on paper on which the

15 color image transferred from the photographic plate is shown. The color receiving paper has a gelatin layer, which has been subjected to a pickling treatment with an aluminum sulfate. The optical reflectivity was at one point on the pa-

ao pier measured that of the thickest point of the photo plate, d. H. corresponds to a thickness of 5 μΐη.

Paint feed nozzle Paint suction device Results

(optical Density)

(1) A pipe made of an acrylic polymer of 2 mm thick and one
20mm diameter with 30 small holes with a diameter of

0.7 mm and
a mutual distance of 7.5 mm

(2) pipe made of an acrylic polymer with a thickness of 2 mm and a diameter of

20 mm with a slot of
200 mm length and 0.3 mm
broad

(3) 0.4mm brass plate
Thickness with a slot of the same size as (2)

Pipe from one
Acrylic polymer from
2mm thickness and
a diameter
from 20 mm with 45
small holes with
a diameter
of 1 mm and
a mutual
Distance of 5 mm

Pipe from one
Acrylic polymer from
2mm thickness and
a diameter
of 20 mm with
a slot of
220 mm length and
0.7 mm width

Brass plate with
0.4 now thickness and
a slot of
220 now length and
5 mm width

2.8

3.0

2.9

The measured value of the optical density is the blue density.

Another embodiment of the device is shown in FIG. 4 shown. In this embodiment has the paint feed nozzle 13 has an outer tube 135, in which the inner tube 131 is provided with a paint feed slot 132 is provided.

The inner tube 131 is also provided with an inlet 133 for the paint so that the paint enters the inner tube 131 can be supplied via a hose 134 with the aid of a pump, not shown. It a large amount of color is printed under pressure from the photographic plate on the drum Slot 132 fed. The outer tube 135 is coaxial

■ «- ■ ·

arranged to the inner tube 131 and has a wide opening up.

The opening surfaces facing the drum 1 serve to remove excess paint that has stuck on the surface of the photographic plate of drum 1 was fed from the slot 132 of the inner tube 131. The excess paint coming out of the outlet of the outer tube 135 flows out, is by means of a

recovered vacuum source, not shown. Below the paint supply nozzle 13 is a further paint suction device 16 shown in FIG. 3b for Recovery of the paint provided, which is connected to a hose 165, which in turn is in connection with a unrepresented source of printing.

For this purpose 2 BIaU drawings

509632/150

Claims (10)

V ^ the ink receiving paper broken in contact Claims: are about the Faibbild from the photoplatter ken and counter-pressure elements, are thereby provided. a "" ki, ν indicates that ink feed nozzles are used in the manufacture of a large number of (13, 14, 15) for thin paint and color copies the transfer method is different suction devices (16, 17, 18) for suction with conventional photographic copiers of excess color on each drum (1, io process in which, with each exposure, em 2, 3) are arranged and that two at a distance res, light-sensitive S.lberhalogenidrnatena !. ver pressure rollers arranged from one another (5 to must be turned, economically advantageous 10) are provided on each drum (1 to 3). In addition, in the color transfer process 2. Photo printing machine according to claim 1, that the color can be selected without dab «au! characterized in that the nozzles (13,14,15) 15 their disadvantageous influence on the photosensitive Care must be taken with emem outer material arranged coaxially with this. E.g. tube (135) that can be used with a vacuum source, (non-luminous and permanent paint shown) is provided, the gloss produced by the color transfer process Outer tube (135) has a wide opening, the color achieved is the color gloss when running the surface of the drum (1 to 3) facing 20 using the usual color copying process is. conventional photographic silver halide shirt