US1195746A - Albert e - Google Patents

Description

A. F. SULZER.

PHOTOGRAPHIC FILM CARTRIDGE.

APPLICATION FILED MAR. 23. I916- 1,195,746. Patented Aug. 22,1916.

INVENTOR AZZMIZ F 5M6! WITNESSES.

of Rochester,

FFIQ.

ALBERT F. SULZER, OF ROCHESTER, NEW YORK, ASSIGNOR TO EASTMAN KODAK COMPANY, OF ROCHESTER, NEW YORK,

A. CORPORATION OF NEW YORK.

PHOTOGRAPHIC-FILM CARTRIDGE.

Specification of Letters Patent.

- Patented Aug. 22, 11916.,

Application filed March 23, 1916. Serial No. 86,155.

To all whom it may concern:

Be it known that I, ALBERT F. SULZER, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Photographic-Film Cartridges; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference numerals marked thereon.

My present invention relates to photographic roll film or cartridges, in which a strip of sensitized film is wound into a roll with a suitable protective backing and a means for permitting or causing designations to be light printed on a film by writing against it while in a camera or holder, and it has for its-object to provide certain improvements in the method of making or treating the backing paper or papers of such cartridges, for the purpose of preventing the deterioration of the photographically sensitized surface due to its proximity to a sheet containing oils or greases, which have a tendency, after long confinement, to desensitize or otherwise injure said surface.

To these and other ends the invention consists in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings: Figure 1 illustrates in perspective view a film cartridge partly unwound to show the arrangement of the several parts, and Fig. 2 is a detail sectional view greatly enlarged to indicate the various coatings on the film, and the superposed wrapping Fig. 3 is a detail sectional view of a modification showing the backing sheet provided with a coating upon only one of its faces.

Similar reference letters throughout the several views indicate the same parts.

My invention, generally described, comprehends the treatment of the outer backing or wrapping paper used as a protective covering in the spooling of photographic film, with a coating of suitable sizing material for preventing the absorption by the backing paper of any oily or greasy substances in more volatile substances from through the paper backing, when confined therewith in the convolutions of the roll, into contact with the photographically sensltlzed surface. The backing-coating may also possess as a further characteristic a physical affinity for the substances comprising the coating of the interleaved sheet for the purpose of assisting in the removal of the coating, under the action of a stylus employed for applying pressure to the outer backing, whereby clear out lines are formed on the sheet through which light rays may pass.

In illustrating my present invention, I have shown a roll of photographic film having the general characteristics of that disclosed in Patent No. 883,819, granted to F. W. Lovejoy, April 7, 1908. In the drawings, the film or transparent support for the sensitized surface is indicatedby A. This film is attached to a backing paper B employed as the protecting covering which may be translucent, and in practice I prefer to employ a red colored paper of such thickness and depth of color that while a number of convolutions or layers thereof Will exclude all light, one thickness will permit the passage of suflicient actinic rays to cause an exposure and light print on the sensitized surface, a reproduction of the lines scribed by the stylus. The desired opacity of the outer wrappings, to prevent the fogging of the sensitized surface is accomplished by the interposition of the coated sheet 0 which is interleaved between the film and the backing paper.

The sheet 0 is preferably a waterproof web or paper having one .of its surfaces coated witha combination of waxy materials and pigment provided for the purpose of rendering the web incapable of transmitting actinic rays of light, either alone or in connection with the aper. This coating may be composed of wax or paraffin, with which is mixed, in a melted or fluid state, an opaque pigment, such as lamp black, together with a suitable dye for coloring the wax. This coating is further tempered, or softened with a mineral or other non-drying oil, which gives the coating the characteristic of being capable of substantial removal or, at least, of being rendered light surface of the web by a stylus.

striking The web may be rendered non-absorbent by treating the paper so as to make it waterproof, which may be done either before or after the coating is applied, and a simple and inexpensive way of making the sheet non-absorbent is to rovide the surface opposite to that carrying the coating with a coat of a comparatively hard wax which is transparent, and when applied to the paper tends to make it more translucent so that when the overlying opaque coating is removed in areas, or along lines produced by a stylus, rays of light may readily pass therethrough to effect the underlying sensitized surface.

It will be observed in Fig. 2 that the sheet C in the position which it occupies between the backing B and the film A is disposed with its opaque coating, or surface d uppermost or adjacent the backing paper B and its waterproof coated surface 6 in contact with the back of the transparent film support A. Consequently, when the three parts, the film A, the sheet C and the backing B are wound together in a roll, the backing paper is interposed in the several convolutions between the front or sensitized side a of the film, and the coated surface d of the sheet C, and therefore it is very essential that the backing sheet B should be treated to prevent possible absorption by its fibers of any portion of the oily or greasy materials existing in the wax itself, or which are used in combination therewith to roduce the easily removable coating an in so treating the backing paper, it is desirable to render it more capable of receiving, or having transferred to it, the removable coating -in order that the desired markings may be made thereon by means of a stylus without requiring the operator to apply undue pressure, and at the same time insure the sufiicient displacement of the coating to admit the passa e of light rays, whereby the markings will e photographically reproduced in the --ensitized surface of the film. As a re- Stilt of my experiments, I have determined that satisfactory'results may be obtained, so far as the protecting of the backing paper against the absorption of oil or grease is concerned, by coating one side of the backin paper with a suitable sizing, such as a thin coating of gelatin, although shellac may be utilized for this purpose. If the gelatin is applied to the under surface I; of the backing paper, it will, when pressed against the adjacent surface d of the sheet C, cause the latter to adhere to it and come off from the sheet C in clear, sharp lines with comparatively little pressure applied to the stylus. If, however, it is desired only to prevent the oily substances from reaching the sensitized photographic surface and omitting the feature of the removal of the coating by its adhering to the gelatin or .ing the shellac sizing of the covering paper, then the latter may be sized on its outer surface only, since this sizing coat occupies a position, in the convolutions on the spool, in contact with the sensitized surface, and any oil or grease absorbed by the fibers of the covering paper will be confined therein. When the covering paper is sized on its outer side only, the coating of the sheet C adheres and comes off by contact directly with the covering paper under pressure of the stylus thereon. For practical reasons, however, I deem it advantageous to apply the sizing of gelatin or shellac to both sides of the backing sheet as the second coating also tends to make the backing sheet more impervious, and therefore affords additional pfiotection to the sensitized surface a of the It will be understood that instead of making the coating absolutely opaque, it may be of such character that with the outer paper covering, it will prevent the passage of light of sufficient intensity to fog the film but when the coating is displaced, sufiicient light will pass to cause the photographic printing required.

I claim as my invention:

1. A backing for photographic sensitized surfaces embodying a coated sheet and a superposed exterior covering sheet, the first mentioned sheet having an opaque coating adapted to' be transferred to the exterior covering by contact produced by local pressure such as that produced by a stylus and the contacting surface of the covering sheet being coated with a sizing material having an affinity for the opaque covering.

2. A backing for photographic sensitized surfaces embodying an interior sheet and a superposed exterior covering sheet, both sheets being coated on their adjacent surfaces, one with a removable coating imperv-ious to the passage of actinic light rays and the other with a sizing having an afiinity for the coating material, said coatings being adapted to cooperate upon the application of pressure, as by means of a stylus, to transfer the coating along the areas of pressure onto the covering sheet.

3. A backing for photographically sensitized surfaces embodying an interior coated sheet and a superposed exterior covering arranged, when the parts are rolled together, to occupy a position between the sensitized surface and the interior sheet, said covering having a coating of suitable material thereon serving to protect the sensitized surface.

4. A backing for photographically sensitized surfaces embodying an interior sheet and a superposed exterior covering having a sizing coat thereon serving to deter ingredients carried on the interior sheet from affectsensitized surface.

5. A backing for rolled films having roll, between the sensitized surface and the interior sheet, and having a coating preventing the oily material of the latter from passing into contact with the sensitized surface.

ALBERT F. SULZER.

Witnesses:

RUSSELL B. GRIFFITH, AGNES NESBITT BISSELL.

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