US1119351A - Photographic-print drier. - Google Patents

Description

J. F. HEYN.

PHOTOGRAPHIG PRINT DRIER.

APPLIOATION FILED JUNE 28,1913.

1,119,351. Patented Dec.1,1914.

Jerome Hey n, 3n wan/01.

I TAES PATENT FFICEE,

JEROME F. HEYN, OF OMAHA, NEBRASKA.

PHOTOGRAPHIC-PRINT DRIER.

Application filed June 28, 1913.

prints, in quantities, and so that the prints will lie flat when dry.

In the accompanying drawings Figure 1 is an end view of a device embodying my invention, Fig. 2 is a longitudinal vertical sectional view of the same on the plane of the line :v-m of Fig. 1, and Fig. 3 is a plan view thereof.

In the finishing of photographs there is usually employed papers which are sensitized by being coated upon one side with a suitable emulsion or layer of sensitizing material. After being printed by exposure to light passed through a negative, the picture is made visible or permanent by the operations of developing or toning, fixing, washing, etc., which involves the treatment of the print with liquids carrying the various chemical reagents for effecting the desired changes. Nearly all photographic print papers, when dried after the foregoing operations, tend to curl toward the coated or sensitized side thereof, such curling being due to the fact that during the drying the shrinkage of the coating is greater than the shrinkage in the body of the paper. Even if the print be held flat during the drying thereof, it will, when freed from restraint, tend to curl and assume a more or less cylindrical form. By the use of the herein described apparatus I am able to dry photographic prints while holding them in such a position that the side toward which they tend to curl is under a tension and is stretched sufficiently to compensate for the contraction thereof when the print is freed, so that when freed the print will lie flat.

In the construction of the device shown, I employ a cylindric plate 1 of sheet metal, and end plates 2 and 3, all of which are sooured to a suitable base-block 4. The endplate 2 has an opening 5 therein through which a suitable heating device, such as the electric incandescent lamp 6 shown in Fig.

Specification of Letters Patent.

Patented Dec. 1,1914.

Serial No. 776 392. i

2, may be placed in the inclosed chamber below the cylindric plate 1. A flexible metal sheet 7 is provided of about the same size and form as the sheet or plate 1, and to the ends of said sheet 7 are secured the rods 8 and ,9. The rods 8 pass through slots in the laterally-cxtending upwardly-inclined lugs 10 which are secured at one side of the baseblock adjoining the lower edge of the curved plate 1. At the lower ends of said rods 8 are spherical heads of a greater diameter than the width of the slots in the lugs 10, which prevent the rods being withdrawn from the slots. The rods form a. shdable and pivotal or hinge-like connection between the end of the flexible sheet and the lugs. The rods 9 i are threaded and each is provided with a thumb-nut 11 and a semispherical washer 12. At the side of the base-block opposite the lugs 10 are similar lugs 13 which are notched or forked at their outer ends so that the rods 9 may be swung into the notches from the ends thereof.

In the use of the device, the prints when ready for drying are placed between sheets 1 1 of absorbent material such as blotting paper, the prints and absorbent sheets being disposed alternately in a pile, and the prints all being faced the same wav. The pile of sheets is then placed upon the curved plate 1 and bent around the same as shown in Fig. 1, the face or coated sideof the prints being disposed outwardly so that in the bending of the sheets to the cylindric form the coated sides of the prints will be placed under tension. The flexible sheet 7 is then drawn over the top of the pile, the rods 9 being passed into the notches in the lugs 13, with the thumb-nuts and washers below the lugs, and the thumb-nuts are then screwed up so as to draw the flexible sheet down tight over the pile and place the same under pressure. The variation permitted in the relation of the rods 8 to the lugs 10, and of the rods 9 to the lugs 13, is such that the flexible sheet may fit evenly and press uniformly upon piles of various thicknesses disposed between it and the cylindric plate 1. It will be noted that the inclination of the rods to the lugs is such that the tension 1 and heat applied as long as may be necessary to dry the prints.

As hereinbefore noted, the prints after drying Will lie substantially flat and smooth, as the curvature given to them during the drying is such as to compensate for the tendency of the coated or sensitized sides to contract and curl the print When the pressure is removed therefrom. As the prints are dried under pressure they have a smooth and uniform surface, Without bulges or depressions occasioned by uneven contraction during the drying thereof.

Now, having described my invention, What I" claim and desire to secure by Letters Patent is:

1. In a device of the class described, a cylindric form, a flexible sheet adapted to be disposed around the form, means forming a slidable and pivotal connection between one end of the flexible sheet and one side of the form, and adjusting means forming a slidable connection between the other end of the sheet and the other side of the form.

2. In a device of the class described, a cylindric plate, a flexible sheet, means for slidably connecting the ends of the flexible sheet and the lateral edges of the cylindric Gemini of this patent may ha plate, means for tensioning the flexible sheet to cause a uniform pressure upon layers of material disposed between the sheet and the plate, and means for heating the cylindric plate.

3. In a device of the class described, a base-block, a cylindric plate having its ends secured to the base-block, laterally projecting slotted and notched lugs secured to the base-block adjoining the edges of the cylindric plate, a flexible sheet, means secured to one end of the sheet and extending through the slotted lugs to slidably and pivotally connect the sheet therewith, means secured to the other end of the sheet and adapted to pass into the notched lugs, and adjusting means for tensioning the flexible sheet to apply pressure to layers of material disposed between the sheet and the cylindric plate.

In testimony whereof I have hereunto subscribed my name in the presence of two Witnesses.

JEROME F. HEYN.

Witnesses:

A. PAT'EK, D. O. BARNELL.

obtained for live cents each. by addressing the Commissioner of Patents,

Washington, 1). 1'3,"

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