US976354A - Photographic plate or film holder. - Google Patents

Description

APPLICATION FILED JULY l,.1910.

Patented N0v.22, 1910.

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VUNITED STATES PATENT OFFICE.

FRED A. FIFIELD, OF TORONTO, ONTARIO, CANADA, ASSIGNOR T0 EASTIVIAN KODAK: C0., OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

PHOTOGRAPHIC PLATE OR FILM HOLDER.

Application filed July 1, 1910.

To all whom it may concern: v

Be it known that I, FRED A. FirlnLD, of Toronto, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Photographic Plates or Film Holders; 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.

The present invention relates to photography and more particularly to photographic sensitized and recording mediums, and it has for its object to provide a convenient and serviceable photographic plate capable of production at a low cost by utilizing a sheet of flexible photographic film suitably reinforced to maintain a fiat position while in the focal plane of the camera and at other times.

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 be ing pointed out in the claims at the end of the specification.

In the drawings: Figure l is a front elevation of a plate constructed in accordance with and illustrating one embodiment of my invention; Fig. 2 is a rear elevation, and Figs. 3 and 4L are detail sections, much en.- larged, taken on the lines -Zn and a-a of Fig. l, respectively.

In the practice of my invention I provide a backing l in the form of a sheet or plate of suitable material approximating the size of the plate desired and of the intended field of exposure. A retaining member 2 is disposed along each edge of the backing with the body portion thereof on the rear face, this part being also composed of suitable sheet material provided with a plurality of ears 3 and 4 embracing the edge of the backing, said ears being disposed on the front side thereof. The ears 4L are preferably wider or have a greater bearing surface than the ears 3 and are preferably disposed alternately with respect to the latter, being clamped or clenched tightly Aagainst the backing, preferably within recesses 3a as shown in Fig. 3 to hold the retaining member and the backing together. The recesses mentioned bring the outer faces of the ears flush with the backing so as to cause no un- Specification of Letters Patent.

Patented Nov. 22, 1910.

Serial No. 569,855.

evenness or break in the continuity of the surface of the latter. The ears 8, however, are spaced slightly from the front face of the backing so as to receive beneath them the sheet of lilm over the edges of which they engage, as clearly shown in Fig. l. The film sheet 5 is approximately the same size as the backing and may be placed against the face thereof either before or after the ears 3 are moved to their described positions. The film whether flexible or relatively stiff is thus made to assume a fiat position undisturbed by the ears 4 even at the edges because of the depressions in which they lie and all parts of the film are assured a position in the focal plane. The plate thus constructed is manipulated substantially in the same manner as the ordinary emulsion-coated glass plates, except during developing or similar treatment at which time the film sheet may be removed from the backing and treated alone.

The present product is much lighter than the glass plates referred to and can be much more safely handled.

I prefer to form the backing l of a light and cheap material, such as cardboard of suitable thickness and dyed black for the purpose, and this cardboard, being relatively flexible though stiffer than the film sheet 5, I prefer to make the retaining members 2 of a stiff material, such as sheet metal so that they act, not only in their retaining capacity, but as a strengthening means that prevents undue bending of the plate or warping thereof. They also protect the otherwise exposed edges of the backing from absorbing moisture and from being damaged by scaling or otherwise, particularly when the plates are manipulated in contact with each other or in a plate holder or magazine. In this instance, the depressions or recesses for the accommodation of the securing ears 4t need not necessarily be previously formed individually but can be made to result from the clenching operation on the ears themselves by forcing the latter to an extent causing them to embed themselves in the compressible material of the backing. In the same manner, the body portion Q of the securing and stiffening strip is preferably embedded or otherwise disposed within a recess 6 in the rear face of the backing extending longitudinally of the edge thereof to prevent them from projecting in a manner to catch and impede the manipulation and disposed on the front thereof, a proportion of said ears being clamped against the backing and the rest being spaced from the front face thereof, and a photographic film disposed againsty the front face of the backing with the spaced ears engaging over the edges thereof.

2. A photographic plate comprising a fieXible backing, a retaining and reinforcing strip of relatively stiff sheet material disposed in rear thereof and provided with a plurality of ears embracing an edge of the backing, and disposed on the frontthereof, alternate ears being clamped against the backing and the rest being spaced from the front face thereof and a photographic film disposed against the front face of the backing with the spaced ears engaging over the edges thereof.

3. In a photographic plate, the combination with a backing having recessed portions on its frontface along the edge thereof, of a retaining member arranged in rear of the backing and provided with a plurality of ears embracing an edge of the backing and disposed on the front thereof, a proportion of said ears being clamped against the backing to lie flush therewith Within the beforementioned recesses and the rest being spaced from the front face thereof, and a photographic film disposed against the front face ofthe backing with the spaced ears engaging over the edges thereof.

4. In a photographic plate, the combination with a backing having a recessed portion on its rear face along the edge thereof, of a retaining member comprising a strip arranged in rear of the backing to occupy the recessed portion and provided with a plurality of ears embracing an edge of the backing and disposed on the front thereof, a proportion of said ears being clamped against the backing and the rest being spaced from the front face thereof, and a protographic film disposed against the front face of the backing with the spaced ears engaging over the edges thereof.

FRED A. FIFIELD. lVitnesses W'. J. BOLAND, E. M. SHARPE.

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