DEV0008850MA - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

Registration day: April 29, 1955 Bekainitgemaelit at SSiIiSSHi

1 December 3, 1956

GERMAN PATENT OFFICE

PATENT APPLICATION

CLASS 57b GROUP 18os INTERNAT. CLASS G 03c -

V 8850 IVa / 57 b

Willy Vogt, Heidelberg March cdsse

has been named as the inventor '

Willy Vogt, Heidelberg Märzgasse 5 >

Method of dowelling reverse originals in the subtractive Color photography with multilayer material on reversal film or for the production of transparencies and paper images on a detour

via a three-color intermediate negative using masks

Addition to patent application V 6921 IVa / 57 b

The main patent application relates to a method for dowelling reversal originals in subtractive color photography with multilayer material on reversal film or for the production of transparencies or paper images by way of a three-color intermediate negative by means of masks. The present invention aims at a simplification and cost reduction of the operation ¹ in the production of masks for the recovery of ίο between negative and reversal duplicates in this method.

According to the main patent application, an intermediate negative or reverse duplicate is to be obtained after a reverse original in

who lent: i.

Practice the following operation required- 15 copying of the original onto mask film,

2. developing the masking film,

3. Bleach

4. Fixate

5. Washing

6. Drying

7. Matching the mask to the original,

8. Copy the original with mask onto the

Duplicate negative film or reverse duplicate film,

9. Processing! of the duplicate negative film

or reverse duplicate film.

609 657/406

V 8850 IVa / 57 b

According to the invention, this operation

very much shortened. If to copy the mask from the original instead of the one to be developed Mask film a material is used that directly forms an image under the action of the copying light

'- results, the original and mask can be copied of the duplicates stay under cover. Since the copy light is used to copy the duplicates (negative or Reverse duplicates) are much weaker

ίο and spectrally composed differently than that Copy light for the mask on the material to be copied out, the mask does not need to be fixed. So it saves the work steps 2 to 7, which is a very significant simplification and Represents cheaper procedure.

The desired success is achieved according to the present invention that in the extraction The mask uses a material that is "copied out" and the original and mask after copying the mask from the original for copying the duplicate negative or the reversal duplicates in the Stay in contact. A blue-violet mask can be made using the cyanotype or the indigoeolverf ears are made. However, a material can also be used to obtain the mask come that is developed "dry", for example using the diazotype process. It is advantageous to proceed in such a way that the duplicate negative or reverse duplicate material

alternately for copying the mask removed from the master copy and for copying the duplicates is brought up to the master copy. A device for carrying out the method such an arrangement of the masking film, the master copy and the copy material have between two light sources that for copying the mask when out of the beam path of the Copy material removed from the light source and protected against exposure, the one light source that Image generated in the mask film and the second light source after the copy material has been attached exposed the image in the copy material through the mask and the master copy. For a "dry development" this device can be designed so that the required chemical substances, For example, in the diazotype, the ammonia gas, automatically and evenly Mask material are fed. A gas required for "dry development" can inflated during exposure, while suitable for "dry development" Pastes can be applied evenly before exposure.

The drawing shows a device for

55, implementation of the method shown, the both figures show two different positions of the device.

In both figures, the mask film 1 is removed from the unwinding drum 2 and on the winding drum 3 rolled up. The master copy 4 (reverse original) lies in front of the mask film i. In position 11, the duplicate negative or reverse duplicate film 5 is that from the supply drum 6 is removed and rolled onto the winding drum 7, out of the beam path the light source 8 removed for exposure of the mask and in this position against exposure covered. When in position I the mask film is exposed and at the same time the mask after the process according to the invention has been developed during exposure, the duplicate becomes negative or Reversal duplicate film 5 brought into position II, while the mask film 1 and the master copy 4 retain their previous position, mask film 1 and master copy 4 therefore in contact remain. In this position II, the light source 9 now comes into effect to expose the duplicates. After completion of the copying process, the master copy 4 is removed; then the Mask film 1 and the duplicate film S continued to rotate until new material for a new copying process has reached the working position. A new master copy 4 is then placed behind the mask film 1 brought, and the copying process can, as described so far, be carried out again.

The exemplary embodiment according to the drawing is a schematic illustration which is only intended to show should how a device according to the invention can work in principle, technical details, which can be carried out with means known per se are omitted. So can the duplicate film 5 brought behind the master copy 4 by folding it over, for example around hinge joints and can also be brought out of the beam path of the light source 8 by folding it over.

Claims (6)

PATENT CLAIMS: 1. Procedure for dowelling reverse originals in subtractive color photo graphic with multilayer material on reversal film or for the production of transparencies and paper images by way of a three-color intermediate negative using masks, according to patent application V 6921 IV a / 57 b, characterized in that during the extraction a material is used for the mask that is "copied out", and the original and mask are based on copying the mask from the original to copy the duplicate negative or reversal duplicates stay in touch. 2. The method according to claim 1, characterized in that that a blue-violet mask by the method of the cyanotype or the indigosol method will be produced. . 3. The method according to claim 1 ,. characterized in that a material for use comes, which is developed "dry", for example in the process of the diazotype. 4. Method according to one of claims i, 2 and 3, characterized in that the duplicate negative or reverse duplicate material is alternated removed from the master copy when copying the mask and brought up to the master copy to copy the duplicates will. 657/40 « V 8850 IVa / 57 b '■ 5. Procedure for carrying out the procedure according to claim 4, characterized by such an arrangement of the mask film, the Copy master and copy material between two light sources that when copying the mask when it is removed from the beam path of the light source and protected against exposure Copy material a light source (8) creates the image in the mask film and after Bring the copy material to the second light source (9) through the mask and master copy exposes the image in the copy material through it, 6. The method according to claim 5, characterized in that that the chemical substances required for "dry development", for example ammonia gas in the diazotype, are automatically and evenly fed to the mask material. 1 sheet of drawings