US920138A - Photographic-printing device. - Google Patents

Description

Patented May 4, 1909.

HVIIIINIVIIIIIINNII ||INH||U IH H I l l ll l C. J. HILLMAN. PHOTOGRAPHIG PRINTING DEVICE.

APPLICATION FILED MAY 16, 1907.

SSFS a/AW Cir CHARLES JENNINGS HILLMAN, OF LONDON, ENGLAND.

PHOTOGRAPHIC-PRINTING DEVICE Specification of Letters Patent.

Application filed Iay 16, 1907.

Patented May 4, '1.909.

Serial No. 373,933.

To all whom it may concer/a:

Be it known that l, OnAnLns JnNNrNes HILLMAN, a subject of the King of Great Britain and ireland, residing at No. 6 Dyers Buildings, llolborn, in the city of London, England, have invented new and useful lmprovements in hotographic-Printing lDevices, of which the following is a specification.

rl`his invention has reference to a new or improved photographic printing device, particularly applicable for use in duplication of drawings, and it has for its objects the simplification of the device, by reducing its weight (as compared with the apparatus heretofore in use) so as to render it more convenient in manipulation, to lessen the cost of construction, and to obtain increased. efficiency in the work produced. For these purposes, according to one arrangement, the device or apparatus consists of two sheets or layers of `flexible material, each secured to end strips'of pieces of wood or other suitable substance. One of the sheets or layers is transparent, and may be composed of celluloid or other flexible substance capable of transmitting rays of light the other sheet is composed of inillboard metal, wood leather or other suitable material, so that it will maintain an even, regular form when in a curved state. Or where the drawing to be duplicated is on material more or less capable of transmitting light such drawing may, if desired, form the front sheet of the apparatus.

When the flexible sheets are placed together and the two ends are drawn toward each other, the apparatus will be caused to assume a bent or curvilinear form, the sheet of millboard or other substance being provided with means whereby the ends are drawn together, with the result that the sheet of millboard is forced toward the transparency the latter being drawn or stretched into close contact therewith, owing to its being on the outer face and at a greater distance from the axis of curvature.

rThe drawing to be duplicated and the sensitized paper on which such duplication is to be made are placed in position by the two sheets or layers as above, facing the Celluloid sheet which is then exposed to the light in the usual manner.

:instead of the backing sheet being composed of millboard, metal, leather or other like substance, it may be composed of a number of transverse pieces of any suitable material, such as wood, articulated together after the manner of a revolving shutter, so that the whole of the parts may be rolled up into small compa-ss and put away when not in use.

ln order that the invention may be more clearly understood, reference is made to the accompanying drawings, in which:

Figure l is a front elevation of the apparatus Fig. 2 is a back view of the saine; Fig. 3 is a longitudinal section to an enlarged scale, through the line A-B of Fig. l Fig. Ll is a similar view to a smaller scale of a backing sheet composed of a number of transverse strips of wood or other suitable material articulated together.

Similar letters refer to similar throughout the several views.

a is a sheet of Celluloid or other flexible, substance capable oi transmitting rays oll lightl lt is secured at each end to a strip or fillet oi' wood or other suitable rigid substance l).

c is the backing sheet composed preferably of millboard, the ends of which are secured to the strips or iillets d, the length of the baching sheet and its end pieces being such that it will 'fit freely within the end pieces 7o of the front sheet a.

e is a suitable form of adjustable strap or other suitable stretching device secured to the backing piece c in any convenient manparts ner, at or about the points c1, the straps then passing through the loops c2 secured to each ol' the end pieces l) by the studs c3. By this means the two ends of the sheets a and c are drawn toward each other to the required extent, and the sheets thereby caused to assume a bent or curvilinear form, the ends d taking a bearing against the end pieces l), whereby the transparent sheet ay is stretched around the backing sheet c and brought into intimate Contact with it.

rl`he drawing to be duplicated f, and the sensitized paper g are shown in dotted lines in Fig. l of the drawings.

Any suitable method may be adapted for producing the curved form of the apparatus, and in the larger sizes of the device two or more sets of straps or their equivalent may be used with advantage. lt is important that in any such devices, the attachment to the straps or to the fillets l) should. be so situated and arranged as to prevent the straps or fillets d on the backing, forcingl outward when the apparatus is Curved.

Then it is desired to adapt the apparatus entirely for the purpose of printing by means of artiiioial light the positions of the sheets a and c and oi' their corresponding end pieces Z) and (l are reversed, that is to say the sheet of Celluloid or the like is shorter than the sheet of millboard and its end pieces b Will come Within and bear against the end pieces d, the sheet oi' Celluloid a Will then form the inner side and act as a compression member of the curved device.

lhat l claim and desire to secure by Letters Patent oi' the United States is 1. rlhe combination in a photographic printing device of a sheet of flexible material Acapable of transmitting` rays oil light, a flexible backing sheet and an adjustable strap for bending both sheets.

2. A photographic printing device comprising a sheet oi transparent flexible material, a projection at eaeh end ol' the same, a flexible backing sheet, adapted to sliding-ly it in the space formed by said projections and lying parallel to the transparent sheet, and means for bendingv both sheets.

In testimony whereof l have signed my naine to tnis specification in the presence oi' two subscribing` Witnesses.

CHARLES JENNINGS HlliiiiilAN.

/Vitnesses A. NUTTING, F. L. RAND.

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