US1751881A - Process for making colored photographs - Google Patents

Description

March 25, 1930. G. N. PIPER PROCESS FOR MAKING COLORED PHOTOGRAPHS Filed April 22, 1927 M L1 n e 0 n ad attenua? `-the nozzles.

Patented Mar. 25, 1930 UNITED STATES GEORGE N. PIFER, 0F CLEVELAND, OHIO,

ASSIGNOR, BY MESNE ASSIGNMENTS, TO

v AMERICAN PHOTOTURE COMPANY. OF NEW YORK, N. Y., A CORPORATION OF DELA- WARE PROCESS FOR MAKING COLORED PHOTOGRAPHS Application tiled April 22,

of my prior application, positive pictures are produced in the following manner: An exposure is first made on a portion of a continuous film suppliedy from a spool, and the exposed portion of the film is then shifted by a movement of the film into a chamber where the exposed surface is developed, fixed and washed. Then a card having a sensitized surface is fed to a position for exposure and subsequent development. The exposure is made from the film `and the exposed surface is developed, fixed and washed to produce the finished positive picture.

' Both in the development of the negative and in the development of the positive picture, a novel process is used wherein aerated developing, fixing and washing solutions are directed onto the exposed surface. These solutions are supplied from three receptacles, each of which is provided with a discharge nozzle, andthe solutions are selectively discharged from these nozzles and directed in aerated form onto the exposed surface, this being accomplished by causing a stream of air to be, directed successively across the endsA of In practice, therel is directed onto the exposed' surface first an aerated :stream vor spray of developingsolution, then y an aerated-'washing solution, then fan aerated fixing solution, and finally the aerated washing solution. This same developing process v is applied to both the negative and the positive pictures through two sets of nozzles.

I have discovered that by this same process, with the addition of suitably colored washing solutions, very beautiful colored photogra hs can bev produced, there being used pre erably but not necessarily two colored washing solutions in producing the positive picture,

1927. Serial No. 185,681.

The process will be explainedv more fully 1n connection with the accompanying drawing, the single figure of which shows conventionally or diagrammatically the manner in which the process is carried out in the production of a positive picture.

In the drawing, I have shown at 10 a card having a gelatinized orl sensitized portion 11. which it will be assumed has been exposed and is ready for development. Ifthe invention is used in the automatic photo aphing machine, it may be assumed that t is is the card on which the positive picture is made .from the negative which may have been de veloped in the same or substantially the same Way as the development which is to take place on this card.

The solutions used in the developing process are supplied from suitable receptacles, of which four are here illustrated and designated 12, 13, 14 and 15. If four receptacles are used, as is sometimes preferred, one will contain the developing solution, another the fixing solution, and the other two washing solutions of two'different colors, as, for example, red and yellow, which when used successively in the developing process employed in producing the positive picture I find cause a very pleasing flesh color.

The receptacle 13 may contain the developing solution, the receptacle lthered colored washing solution, the receptacle 15 the fixing solution, and the receptacle 12 the yellow colored washing solution.

As here illustrated, the receptacles 12 to 15 are shown as bottles which4 areinverted, so that the solutions may stand at a given height in receiving rece tacles 16, eachof which is connected by a tu e 17 to a delive portion 18 from which extends a delivery tlilie 19 terminating in a nozzle. The four nozzles are arranged in line close to each other, these being designated 12, 13, 14* and 15. It is obvious that as'lon as there is solution in the bottles or receptac es 12 to 15 the solution will stand at a given height in the receiving receptacles 16 and at the same height in the delivery receptacles 18.

Aerated solutions are caused to be discharged successively ,flOm the different nozzles b v the following means. Air is supplied under suitable pressure from a tube or pipe 20 and is led to a easing 21 containing four air nozzles 22 which are arranged so as to deliver blasts of air across the ends of the solution delivery nozzles 12", 13, 14 and 15a. Slidable in the casing 21 is a distributor 23 in the form of a. plunger having on one side an elongated slot 24 which at all times: registers with the air supply tube 20 and having on the opposite side a port 25 which is adapted to be moved into registration successively with each of the four air nozzles 22. The air nozzles 22 are so arranged with respect to each other as well as with respect to the solution delivery nozzles, that as the streams of air are directed over the same aerated solutions will be directed onto the exposed sensitized surface, as indicated in the drawing, this being true regardless of from which pair ofeooperatingnozzlesthesolution and air are being delivered, it being assumed, of course, that the surface on which the solutions are to be directed .will have a given position with respect to the nozzles.

In carrying out the process, the distributor 23 will first be so positioned as to cause the aerated developing solution to be directed onto the exposed surface. This is done by positioning the plunger so that the port 25 is brought into registration with the air nozzle 22 at the end of nozzle 13a. Next, the distributor is moved so as to bring the port 25 into registration with air nozzle which is over solution delivery nozzle 14 so as to cause a colored washing solution from receptacle 14 to be delivered onto the surface. Next, it is moved so as to bring the port 25 into registration with the air nozzle 22 so as to cause an aerated fixing solution to be directed onto the surface. This can be accomplished by giving the distributor successive movements in the same direction. Then a colored washing solution is again applied, this being preferably from receptacle 12 so as to cause the surface to be washed with a different colored washing solution. To do this, the distributor 23 is moved back until port 25 is in registration with the air nozzle associated with solution delivery nozzle 12a. The developing now having been completed, the distributor is moved so as to place the port 25 in neutral position. It will be seen from the above that first an aerated developer is sprayed onto the sensitized surface, quickly followed by an aerated washing solution, then by an aerated fixing solution, and finally by another aerated washing solution.

Let it be assumed that the receptacle 14 contains water colored red with a suitable dye and that receptacle 12 contains water colored yellow with a `suitable dye. Accordingly, after the developer is applied, the developed surface is rinsed with a colored wash which will give a red tint to the surface, and after solutions. If the same washing solution is used following the application of the developing and fixing solutions, three receptacles only will be necessary, otherwise four will be required if a. combination of two colors is desired. It may be desirable to employ plain 4or uncolored water for the wash following the application of the developing solution, in which event the washing solution of l the desired color or washing solutions of two different colors will be applied following the application of the fixing solution. All of these modifications I regard as coming within the scope of my invention.

In the use of this process in an automatic photographing machine, such as shown in my prior application, one set of receptacles only will be needed for the Adevelopment of the negative and for the development of the image of the positive picture, but two sets of nozzles will be employed, the solution deliv-- ery nozzles of the two sets receiving solutions from the same group of receptacles, and, of course, two sets of air nozzles will be employed. The air distributors or plungers 23 of the two sets will be automatically operated so as to cause the different aerated solutions to be applied in the right sequence onto the exposed negative and onto the exposed positive.

In the development of the negative, solutions from three of the receptacles only are needed, and if it be assumed that two 4different colored washing solutions are employed, such, for example, as red and yellow,whicl1 were the colors-first mentioned, the yello/vv7 wash will be omitted and the surface of the negative will be washed withV the red solution after the application of both the developing and the fixing solutions. This will give the negative Ia red tint which, if a suitable red is employed and if the solution is sufiiciently diluted, does no harm in so far as the exposure on the positive is concerned, although it may slow Aup the printing action very slightly since the correct red color does not materiallyl p i tive. However, my invention is not so im-v portant inthe development of the negative as lit is in the development of the positive,

. and a colored washing solution is employed in the development of the negative in order to employ in the automatic photographing machine only the minimum number of solution receptacles in the completion of the cycle of operations of the machine for the production of colored photographs.

Having thus described my invention, I claim:

1. The process of producing a colored photograph which comprises developing an eX- posed surface and utilizing a colored Washing solution in the developing process.

2. The process of producing colored photographs which comprises applying to `an exposed sensitized surface developing and fixing solutions and a colored washing solution.

3. The process of making colored photographs Which comprises developing an eX- posed sensitized surface and utilizing in said development a plurality of differently colored Washing solutions.

4. The process of making colored photographs which comprises developing an eX- posed sensitized surface by subjecting it to the action of different solutions including an atomized colored Washing solution.

5. The process of making colored photographs which comprises developing an exposed sensitized surface by directing thereon atomized developing and fixing solutions and an atomized colored Washing solution.

6. The process of making colored photographs which comprises developing an eX- posed sensitized surface by directing thereon atomized developing and fixing solutions and two differently colored atomized washing solutions.

7. The process of making colored photographs which comprises d veloping an exposed sensitized surface by directing thereon successively an atomized developing solution,

an atomized washing solution of one color, an atomized fixing solution, and an atomized washing solution of another color.

In testimony whereof, I hereunto allix my signature.

GEORGE N. PIFER.

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