US2112838A - Photographic printing apparatus - Google Patents

Description

April 5, 1938. L, GRlFFlN 2 ,112,838

PHOTOGRAPHIC PRINTING APPARATUS 55' MQW April 5, 1938. L 1 GRIFFIN 2,112,838

PHOTOGRAPHI C PRINT ING APPARATUS Filed July 2l, 1957 5 Sheets-Sheet 2 y////////////////W////////////////////////////////Z a a /2 ,5 0 9 4 24 a a \\\\\\\\\\\\`f/////////////////////////W/W{\ o1 27g/@Miam April 5, 1938. L. 1 GRIFFINl l 2,112,838

PHOTOGRAPHIC PRINTING AFPARATUS Filed July 21, 195'/ s sheets-sheet 3 Patented Apr. 5, 193.8

UNITED STATES PT-ENT YOFFICE PHOTOGRAPHIC PRINTING APPARATUS Leonard. L. Griffin, Fredericksburg, Va.

Application July 21, 1937, Serial N0. 154,733 3 Claims. (Cl. 88-24) (Granted under the aet `or Maren s, 188s, as amended April so, 192s; 37o o. G. '157) My invention relates to improvements in phointo shoulders 28. Into the open sides 25 are tographic printing apparatus and more particuinserted paper-holder frames 29 which are caused larly to improvements in apparatus for making y to rest upon the shoulders 26, 2l and 28, and are enlarged positive prints directly from relatively secured in place by means of clips 30 mounted on 5 small negatives. y ends 22 and 23 and on the distance pieces 24.

An important object of my invention is to pro- An annular ring 3| is secured on the end 22 of vide such an apparatus that may -be used for the the frame` holder I6, with the axle I1 as the cenpurpose of making positive prints from negatives ter. This ring contains slots 32, the number of in rapid succession. slots corresponding to the number of open sides k Another object of my invention is to provide .25. A spring loaded plunger stop 331s so mounted 10 such an apparatus that may be used to make on the handle side of the light-tight housing I2 p positive prints from such negatives that might as will allow the plunger stop 33 to coincide with require different grades of contrast paper. the annular ring 3l, and to it into one of the Other objects and advantages of my invention slots 32 when the slot 32 is opposite the plunger wi11 be apparent during the course of the foiiowstop 33. Any conventional type frame oontein- 15 ing description. ing sensitized paper is placed in the open sides In the drawings forming a. part of this speci- 25, but the one which I have adopted is shown in cation, and in which like numbers are employed Figs. 5 and 5, and COP-SSS 0f the frame 29 Wnich to designate like parts throughout the same, has its face partially cut away and hinged at 34.

Fig. 1 shows my invention as adapted to be One end of the frame 29 is scalloped at 35 for 20 used with a projecting lantern in a l'horizontal easy removal 0f print paper fOm the frame The P19116; i back of the frame 29 is shovm in Fig. 6 and con- Flg. 2 is a sectional View through 2 2; sists of a flat piece 96, shaped to conform to the Fig. 3 is a sectional view through 3-1-3; inner shape oi the frame 29. Bolts 3l are secured Fig. 41S a perspective View of a rotatable frame to the back and form a core for coil springs 38. holder; The back is secured to the frame proper by means Fig. 5 is a perspective view of a frame; and of slats 39 which rit into grooves in the sides of Fig. 6 is a perspective view of the back of a the iframey and which are loosely attached to the frame. bolts 3l by means of nuts 4i). 3 In the drawings, Where for the purpose of il- The operation of my device is as follows:

lustration is shown a preferred embodiment of Photographie print peper of different degrees my invention, the numeral I0 indicates a pro- 0f sensitiveness is arranged in the diierent jecting lantern sudably mounted on a table il frames. The frames are then secured in the open and Which is used in conjunction with my invensides 25 of the frame holder i6. In one oi these tion. Any conventional type projecting lantern sides, is placed a special frame similar 'to the 35 and table may be used. Also mounted on the others, but instead of being filled with light sentabie Il is a light-tight housing l2 containing an sitive peper, it holds e sheet of Clear white paper opening on one side closable by a door I3 which PIOVdn-g E Sreen, the pul'pOSe 0f Which Will be is attached to the housing I2 by hinges i4, and explained later.

40 Securable in a closed position by a latch l5, A With the machine thus loaded the negative to 40 multi-sided frame holder I6 is rotatably mounted be printed is inserted in the projecting lantern within the housing l2 by means of an axle l1 I 0 endis caused to ne projected through the open that extends through the center of, and is rigidly dOOl' t3 of the lght-tght hOllSllg l2 and Onto the secured to, the ho1der It, and that terminates at special frame Where it is foeused- From the inone end I8 and at the other end in a handle i9. tensity 0f the image OImed 0n this Special frame 45 Light-tight fittings 2U and 2I are secured in the is determined what grade of paper is desired to sides of the'housing I2 for the purpose of supbe used for the printing. After determining the porting the axle I'I. The frame holder IS congrade of paper to be used, the light beam coming sists of ends 22 and 23 that are held apart by from the projecting lantern I0 is prevented from distance pieces 24. The ends 22 and 23, and the entering the light-tight housing by shutting it 50 kdistance pieces 24, form the open sides 25. The oi at its source, or by closing the door I3. With number of sides that may thus be formed is unthe light thus excluded from the housing I2, the limited. The inner edges of the ends 22 and 23 frame holder'l is rotated by means of the handle are formed into shoulders 26 and 2l, and the I9 until the paper of the proper degree offensiinner edges of the distance pieces 24 are formed tiveness is opposite the door I3. The .Laine holdi' n er is then secured in this position by means of the plunger stop 33 entering onerof the slots 32. 'I'he paper of the desired sensitiveness is then exposed to the projected image from the lantern I0. After suiiicient exposure the lightis discontinuedfand the exposed paper is removed from the frame 29 and passed on to the developer. 'Ihe front of the frame.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of .any royalties thereon or therefor.

Having thus described my invention, what I claim is:

1. A frame for photographic print paper comprising two side pieces,.two end pieces, the upper portion of said side pieces being broken and hinged so as to form with the upper portion of one of said end pieces a door-like unit, and a at back iittable in said frame, slats movably connected with said back .for engagement with grooves contained, in said side pieces, and means for forcing said fiat back towards the face of` said frame. i

2. A frame for photographic print paper comprising two side pieces; two end pieces, the upper portion of said side pieces being broken and hinged so as to form with the upper portion of one of said end pieces a. door-like unit, the remaining portion of said end piece containing a scalloped recess to allow easy access to the paper; a fiat back ttable in said frame, slats movably connected with said back for engagement with grooves contained in said side pieces, and means, for 4forcing said iiat back towards the face of said frame.

2i. A frame for photographic print paper comprising two side pieces, two end pieces, the upper portions of said side pieces being broken and hinged so as to form with the upper portion of one of said end pieces a door-like unit, and a at back flttable in said frame, means for movably connecting said back to said frame, and means for forcing saidl fiat back towards the face of said frame.-

LEONARD L. GRIFFIN.

Images