DE2132979B2 - Photo printing machine for the production of rotary photocopies according to the diffusion process - Google Patents

Description

30 net.

Traditionally, the dye transfer process has been done by hand. It was already one

The invention relates to a photo printing automatic device for the production of tech

machine for the production of Rotationsphotckopien 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. Color recording material is brought together, where-

In the case of the photographic printing diffusion process, a color recording material is used as well as the art color image transferred to a carrier material, fabric 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 monochrome 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 papers or» Pa-45 a washing 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 to a paper and rather dampening and color on the printing form

in order to obtain a multicolored picture, here the supporting cylinder is sprayed on and the color 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 comprises 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. Of the

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

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

Color 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

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

with a sufficient amount of paint in the device, the gears 11 and 12 become

Gelatin layer can penetrate. Around this time and drums 1, 2 and 3 in the direction of in

span, the distance between F i g. 1 shown arrows, so that the

the Farbzaführungvorrichlung and the Farbabsaug- 5 with the images to be provided paper 4 according to

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

so that the color receiving paper and the photo is promoted and on the drums 1, 2, 3

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

of lying in touch to be a satisfactory.

Transfer of the into the gelatin layer of the photo. A photo plate is on each drum 1, 2, 3 on a plate Penetrated paint on the paint receptacle stretched. It extends almost over the circumference paper to enable. 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

Photo printing machine for rotary photocopying with ordinary letterpress or offset printing inks. the

which easy * color transfers to color 15 color is fed to the photographic plate in such a way that it is on

Receipt paper can be obtained. the surface of the photographic plate flows. The opening

According to the invention, a photo printing machine of the ink supply nozzle 13, 14, 15 has a sufficient one

Machine for making large width rotary photocopies with respect to the width of the paper 4.

with photo mounted on driven drums. The photo plate absorbs the color until the one with the

to plates, inking units and counterpressure elements soaked in part of the photo plate when rotating

create, which is characterized in that dyeing the drum 13, 14, 15 the device for re-

feed nozzles for thin-bodied paint and paint recovery from the paint. The absorption of the

Suction devices for sucking off excess paint is carried out in a gelatin bowl with the

Color are arranged on each drum and that lowing image. The excess paint that isn't

two spaced-apart pressure plates »5 was absorbed by the photographic plate, is through

rolls are provided on each drum. sucked off a suction pump. Then the chief

With the devices according to the dependent claims, a washing liquid is added to the photographic plate for coloring photographic plates, which leads to the excess on the surface of the photographic plate To remove paint from the surface of the photo-adhesive paint. The paper 4 is with If the plate is removed, a beautiful color image can be produced without the help of the pressure rollers 5 to 10 with the surface Veil can be achieved. Also the color for the photographic plate can be brought into contact so that the a repeated use will recover paper 4 together with that on the drum 1, 2, 3 the. located photo plate is transported further.

The photo printing machine according to the invention. The paper 4 touches the photo plates between

will be seen in more detail below with reference to the drawings 35 the pressure rollers 5 to 10. While the pa-

explained. In the drawing shows pier 4 in contact with the photographic plates under the

F i g. 1 is a schematic side view of a photo printing action of the pressure rollers 5 to 10 by the

todruckmaschine, rotation of the drums 1, 2, 3 is promoted

F i g. FIG. 2 shows a side view of part of the photo-the color image on the photographic plates on the paper 4

printing machine, 40 transfer.

Fig. 3 and 3b partially sectioned side view- In Fig. 2 is the device for the feed

a device for the recovery of the color of the paint and the device for the recovery

and voltage of the color shown on an enlarged scale.

F i g. 4 is a side view of a modification of the drum 1 has a photo plate 200 mounted thereon.

Photo printing machine. 45 cocks. The paint comes from the paint feed nozzle

F i g. 1 shows a schematic side view of a 13 fed so that the ink flows from the photographic plate 200 onto the photographic printing machine surface for rotary printing. The color is through different colors. The reference numerals 1, 2 and 3 denote a suction opening of the paint suction device 16 for cylindrical drums, onto which the recovery of the paint is sucked. The B; -a photographic plate with the respective color separation drawing 210 denotes a frame that is stretched. Numeral 4 denotes an ink supply nozzle 13, and the ink suction device denotes paper to be provided with color images. The reference 16 carries for the recovery of the color,
Characters 5 to 10 denote pressure rollers, with the case in FIG. 2 embodiment shown, the pressure roller 10 simultaneously as a guide roller are the devices 13 and 16 for the supply of the works, which leads the paper 4 to subsequent process stages or to the drying stage to the subsequent recovery of the color with an outer tube. Those who see which on one side have an axially extending reference numerals 11 and 12 denote gears which have the slot and mesh as feed or recovery with gears which serve on one side of the opening. As a device for the supply drums 1, 2 and 3 are arranged so that the or recovery of the color can also be one drums 1, 2, 3 all driven in synchronism with a plurality of tubes lying in one line. The reference numerals 13, 14 and 15 denote small holes, a porous tube, a melall nozzle, paint feed nozzles for feeding the paint to a nozzle filled with porous material or punish drums 1, 2 and 3 with which are used.

stretched photo plates. Reference numerals 16, 17 Figs. 3a and 3b show other embodiments 18 shows paint suction devices for the 65 examples of the paint suction device. F i g. 3 a shows Color recovery, and the reference numerals a side view, partly in section, of a metal 19, 20 and 21 denote washing devices, with a nozzle with a slit-shaped opening 161 which extends which excess paint is removed. extends perpendicular to the plane of the drawing. The loading

Numeral 162 shows a portion connected to a vacuum wave. The vacuum source is connected to a paint container. Fig. 3b shows another embodiment in which a porous material 163 is filled into the nozzle part. Numeral 164 denotes a sieve material which is inserted into the nozzle part together with the porous material 163.

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 mode 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. When dry, the photo plate is at most 5 μm thick. The drum becomes a speed wedge 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 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 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 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 measured at a point on the paper which is the thickest point of the photographic plate, i.e. H. corresponds to a thickness of 5 µm.

Paint feed nozzle

Paint suction device

Results

(optical
Density)

(1) Pipe made of an acrylic polymer of 2mm thick and one
Diameter of 20 mm 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)

Acrylic polymer tube 2mm thick and 20mm in diameter with 45 small holes with a diameter of 1 mm and one mutual Distance of 5 mm

Tube made of an acrylic polymer 2 mm thick and 20 mm in diameter with a slot 220 mm long and 0.7 mm wide

Brass plate with

0.4mm thickness and

a slot of

220 mm long and 5 mm wide

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, the paint feed nozzle 13 has an outer tube 135 , in which the inner tube 131 with a paint feed slot 132 extends.

The inner tube 131 is also provided with an inlet 133 for the paint, so that the paint can be fed into the inner tube 131 via a hose 134 with the aid of a pump, not shown. A large amount of ink is fed under pressure to the photographic plate on the drum through the slit 132. The outer tube 135 is coaxial

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

The opening surfaces facing the drum 1 are used to remove excess paint that is fed onto the surface of the photographic plate of the drum 1 from the slot 132 of the inner tube 131 became. The excess paint that flows out of the outlet of the outer tube 135 is by means of a recovered vacuum source not shown. Below the paint feed nozzle 13 is another in F i g. 3 b shown paint suction device 16 for recovering the paint provided with a hose 165 is connected, which in turn is connected to a vacuum source (not shown) communicates.

For this purpose 2 sheets of drawings

H »581/355

Claims (4)

Jfc ρ,. »..,« «« - «*». brought into contact with ^{the color receiving paper} Claims. be to the color image from the photographic plates f .. Photo printing machine for making transfer onto paper. Rotary photocopies with on-driven When repeating the last three process steps Drums stretched photoplaiicn, inking 5 a number of multicolored copies can be made ken and counter-pressure elements, are thereby provided. indicates that ink feed nozzles are used in the production of a large number of co- - (13, 14, 15) for thin paint and color copies the color transfer process is compared Suction devices (16, 17, 18) for suction with the conventional photographic copier of excess ink on each drum (1, io process in which a dear- 2, 3) are arranged and that two at a distance res, light-sensitive silver halide material ver pressure rollers arranged from one another (S until it has to 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 spoke 1, that the color can be selected without doing so characterized in that the nozzles <13,14,15) 13 their disadvantageous influence on the light-sensitive Care must be taken with an outer material arranged coaxially with this. For example, a tube (135) to 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 3. Photo printing machine 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 that is supplied with a method in terms of economy is filled with a porous material. 25 and gloss 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 expenditure of work and time required and there is filled. this method is unsuitable for mass production