Патент USA US2110279код для вставки
March 8, 1938. F, E. sLoAN _ 2,110,279 PAPER ì HOLDER Filed Aug. 25, 193'? .ïnîmmww 2,110,279 Patented' Mar. 8, '_ÍUNiTEDfs-TATES. PATE-NT OFFICE Appiïîïî 31:30 z_îoîgvïlïiîloîoîîasu 3 Claims.: (Cl. 258-24) This invention relates to a paper holder for use primarily in making photographic enlarge ments. _In making enlargements from relatively large 5 negatives, the enlarging light and the part of the negative whichit is desired to block out can fairly readily be masked from the positive, but in enlarging from the negative of the smaller cameras that are now so popular, it is very diili 10 cult to hold the small negative in place and still get the positive printed in the exact place on the paper that `may be desired and to protect the rest of the paper from the light. For enlargements from such small negatives, 15 it is desirable to locate the positive in a particu lar position on the paper and frequently a> wide ` margin or border is desired. With devices now in use certain fixed borders may be obtained, ybut with the device of this invention, very large, and very narrow borders may be obtained as well as borders of any intermediate width. After once setting the device to obtain the desired border, successive prints may be made in the dark room without disturbing the border arrangement and 25 with the positive assurance thateacli picture will have the identical position on the paper that is desired. The sensitive emulsion on photographic paper used for enlarging is on the upper side, Aand consequently the paper curls upwardly at the edges. In this invention stops are provided which bear up against the mask, under which the paper is inserted, so the upper curling edge will always be engaged by these stops. These stops may be moved to several diiïerent positions to give different border Widths. The stops are placed a ñxed distance apart and for borders of widths between the stops, adjustments of the mask in the two positions at right angles to each other are provided. Other objects and advantages of the invention -40 will appear from the following description and accompanying drawing in which similar numer als refer to similar parts in the views. ’ Figure l-is a plan view of a holder embodying 45 the invention. Figure 2 is a partial sectional view of the holder on line 2-2 of Figure 1. The base I has therein holes 2, the two sepa rate groups of which are in lines, in one group 50 parallel to the back of the base and in the other to the sides of the base. The lines of holes are a fixed distance apart. Pins 3, having in their centers springs 4, which urge the pins upwardly, > may be placed in any two holes in a line parallel 55 to the back of the base and two more in holes in a line parallel to the side, and when a piece of printing paper 5 is placed against these four pins, it will be'square in respect to the sides of the base. A mask S having edges ‘i and 8 at right angles Ul to each other and parallel to the lines of the pin holes is placed on the paper 5, both to hold the paper down on the base, and to cover the edge of the paper to prevent the light from striking it, in order 'to form amargln on the picture being printed. This mask is hinged at 9 and I@ to a plate it, on the lower side of which are two racks i2. An elongated pinion i 3, in brackets M, having thumbheads i5 thereon engage the two racks, and bymhich they may be moved back and forth. The base is cut out as at i6 to give room for the movement of the racks and hinges and yet allow the mask to lie fiat on the base. The cut out pomions it, at il have` edges form ing stops to ‘the ‘forward movement of the 2@ hinges, and therefore of the mask. 'I'he mask has thereon a hold member it? projecting from its side, by' ‘leans which it may be moved sidewlse, the racks keeping their position with respect the haelt oi? the base, but the elon 25 gated pinion allowing them to slide thereover. ‘The openings l@ are large enough to allow this movement, their sides form proper stops to limit the sidewiœ movement-oi the mask. Grad uations Il@ are on edges Tl and 8 of the mask. The pins 3 are urged upwardly against the under side of the mask so that, though the paper 5 curls upwardly, the pins form positive stops for it. After locating the paper on the base, and set 35 ting the masi: d for ‘two sides of the paper, the masks 2t and 2i are moved to the desired posi tions as determined by the graduations i9 to mask the other two edges of the paper. 'I'he base l has brackets 22 thereon in which is pivot ally mounted the square rod frame 23. This frame has on its rear and left side depending members 2i, the inner edges 25 of which project downwardly and securely hold mask 6 down dur ing a printing operation. Also on the rear and left side of the frame are resiliently held car riages 26 to which 'the masks 2B and 2| are at tached. These carriages 26 have knobs 2l by which they are movable along the rods of frame 23. Arc 28, striking bar 29, limits’the' upward 50 and backward swing of the frame 23. _ When it is desired to make a print, the exact location for the picture on the paper may be determined by placing a. pair of L squares on the paper and moving them around until this exact 55 :1,110,979A . location is found. 'I'hen the paper is placed' on thebase I and pinslareputinthelocations nearest _to the desired margins, and the paper placed against the pins. The mask I is then lowered. and moved .back or forth and sidewise, until the exact desired picture location and mar gin are obtained. Then masks 2l and 2| are moved to complete the margins on the other two . edges. With this setting, any number of prints may be made by simply raising the masks and removing and inserting successive sheets„without disturbing the location of the masks, and these operations may be carried on in the dark room, without additional light. ' While the invention has been described as a paper» holder for use in making photographic enlargements, it may be used for holding Pßper for other purposes. Having thus.described the invention, what is claimed as new and is desired to be secured by Letters Patent is:' 1. In a holder for paper, the combination with ~ a base, pinions along one edge thereof, rack bars engaging said pinions and a mask hinged to said 25 rack bars, means projecting from _said base against which to position paper thereon and under said mask, said mask being movable by said racks and pinions in a straight line over said base to vary the margin of the paper there under. l 2. In a holder for paper, the combination with a base, elongated pinions along one edge thereof, rack bars engaging said pinions and a mask 6 hinged to said rack bars, means projecting from said base against which to position paper there on and under said mask, said mask being mov able by said racks and pinions in a straight line, and said racks being‘slidable along said pinions 4in a direction at right angles to said straight line, to vary the margin of the paper thereunder. V 3. In a holder for paper. the combination with a base, elongated pinions along one edge thereof, rack bars engaging said pinions and a mask hinged to said rack bars, said,base having there in a plurality oi' openings, resiliently projecting pins> in a selected group of said openings contact ing the under side of said mask and serving as guides against which to position paper upon said 20l base and under said mask, said mask being mov able by said racks and pinions in a straight line, y and said racks being slidable along said pinions in a direction at right angles to said straight line, to vary the margin of the paper thereunderl for any amount not allowed by the possible posi tioning of said pins. FRANCIS EUGENE SLOAN.