US1549298A - Photoprinting frame for film negatives - Google Patents

Description

' Aug. 11, 1925. 1,549,298

L. cRAYssAc PHOTOPRINTING FRAME FOR FILM NEGATVES original Filed Aug, 17. 1922 2 shuts-shui 1 C50/1 C rcySSIGC per 'f' Aug. 11, 192s. 1,549,298

L. CRAYSSAC PHOTOPRINTING FRAME FOR FILM NEGATIVES original vFiled Aug, 17, 1922 2 sneeze-sneu z nven/'or on Cra ssac Patented siting, ll, i925.

UNITED STATES LON CRAYSSAC, 0F CETTE, FRANCE.

IPHOTOPRINTING FRAll/IEYFOR FILILVI NEGATIVES.

Original application filed August 17, 1922, Serial No. 582,522.

To all whom t may concern.

Be it known that l, LON Cnnrssic, a citizen of the Republic of France, residing at 7 Rue de llsplanade, Cette, France, have invented certain new and useful Inn provements in Photoprinting Frames for Film'Negatives, of which the following is a specification. j

rlhis application is a division of application Serial No. 582,522, filed August 17, 1922, now Patent No. 1,497,290, June l0, 1924, and the present invention relates to improvements in photo printing frames of the type having an automatic adjustment and in which the device is provided with two sets of releasable grips for holding the negative and the positive in their enact respective positions during the printing operation. The apparatus is particularly adapted for use in printing of iilm negatives, but can also be used for printing plates, and the invention relates more particularly to an improvement in the apparatus described and illustrated in the said Patent No. 1,497,290.

rlihe object of the present invention is to facilitate the printing of negatives when many copies of the saine subject are 'to be obtained, all with a uniform margin on every side, quickly, without trouble and without the necessity of employing skilled operators.

lith these objects in view and with other objects, which will appear as the specification proceeds the invention consists in the new features of construction and combination of parts hereinafter described and particularly pointed out in the claims.

ln the drawings accompanying and for1ning part of the specification:

Fig. l is a plan view showing in full lines the prolongation of the knee lever shaft operating the set of grips holding` the positive to be printed; a portion of the frame being shown in dotted lines. l

Fig. 2 is a plan View drawn to a smaller scale-of the metal portion of a sizing diaphragm to be used when printing ed plate negatives.

Fig. 3 is a plan view to the same scale as Fig. 2 showing the cardboard sheet which receives the plate negative.

Fig. 4 is a section on line l-l of Fig. 2, drawn to a slightly larger scale-showing the sizing diaphragm with its metal portion and cardboard sheet.

Divided and this application led May 9,

Serial No. 637,923.

Fig. 5 is a cross section, to a larger scale showing a frame portion with the sheet of transparent material and its carrying springs.

Fig. 6 shows in longitudinal section a part of the frame with groove, spring and sheet of transparent material.

Fig. 7 is a plan view of the frame showing in full lines the parts adapted to allow the passing of film negatives; the frame being shown diagrammatically in dotted lines.

Fig. 8 is a section on line 2 2 of Fig. 7 and to a larger scale 'showing the slot in the frame and the carved out portion of the lul-shaped shutter allowing the passing through of film negatives.

Fig. 9 is a front view of one of the film negative adjusting devices disposed on the side of the frame.

On the drawings the dotted lines indicate certain of the parts covered by the main patent above referred to and A is the frame; F the shutter hinged to the frame A by the hinges AJ; and T is theabutment against which the folding portion of the shutter is engaged when in the open position.

ris in the patent above referred to, the frame holds a transparent 'sheet and the holding means is hereinafter described. On the transparent sheet is placed a sizing diaphragm which, when used for printing plates is of a particular form as hereinafter described; and the diaphragm is held in position by means of a shutter rigid as a whole and hingedly connected at A to the frame on the one side whilst on the opposite side it is kept in the clos-ed position by means of locks, latches or the like engaging on the arm extremities of the U shaped shutter.

Upon the U shaped shutter are fixed and operate the knee lever shaft M connected to and operating the grips N, the shaft M' being produced in M so as to form a handle at its double bent end and 'the knee lever shaft K of the setof grips holding the negative. The handle M lies below lever R. Gn finishing one print, thel two sets of grips may be automatically released by simply operating the lever R which in its displacement engages the handle M and moves the latter, thus disengaging at the same time the paper print and the negative. Finger rests X are provided at the extremities of each working lever so as to facilitate the application of the iingers upon each of them, the levers are litted with means for connecting them with balanced pedals, said pedals being adjustable so that they may be controlled by toot pressure.

The sizing diaphragm selected tor the print to be obtained is placed on the transparent sheet B of the trame; this diaphragm consisting ot' a cardboard sheet a 2, 3, and l) cut out internally to 'the dimensions and shape corresponding as exactly as possible With the dimensions and shape otl the photograpliic plate to be printed.

Over the cardboard sheet t is hired by means oit rivetsl the metal sheet o which is very thin; this metal sheet is cut in its central portion in any convenient shape, i. e. rectangular, three sides ot the rectangle only being cut through as to form a llap to permit the introduction of the negative to be printed after slightly lifting said tlap. The llap also has a central cut out portion, 'slightly smaller than the corresponding portion on the cardboard sheet; these openings correspond With each other and the diiler* ence in their dimensions gives the margin surrounding 'the print.

A small semicircular opening e permits easy placing and removal ott' the photographic plate; for each size ot plates a special diaphragm is required.

To permit the use ot same printing trame for printing positives ott lilms or plates disposed in the sir/.ing diaphragm, the transparent sheet B disposed in the interior and at the bottom of the trame, rests upon the flat springs f which by their elasticity permit the adjustment ot the sheet B according to the. thickness ot the diaphragm employed; such springs always exerting a. steady pressure against the toldable part or the shutter thus ensuring close contact between the plate or iilm and the printing paper.

The springs are mounted and lined in a groove g, (Figs. 5 and (i) so that the upper portion of the spring is contained tor one half of its Width in the groove Whilst the other halt' carries the transparent sheet on a corresponding Width. The springs are thus securely lreld in their normal position in the groove to which they are fixed and ensure on the other hand, by means ot the protruding part of the upper bends the hold on the protruding transparent sheet B. This transparent sheet is thusheld along its :tour sides; its displacements are always parallel and occur Without special strains for any thickness oi' the diaphragm actually in use.

To print 'from the hlm negatives shown in 7L in Figs. 7 and 8 slot shaped openings i are disposed horizontally on the sides oi the tram-e A; one extremity (J Figa 9) of each opening corresponding exactly to a line parallel to the edge ot the rigid shutter and in prolongation ot the set ot grips ZI.' these slots oit a determined length are slightly Wider in the interior ot `the training so as to permit the easy passing through of the lilm la below the protruding arms oi? the rigid portion ol the shutter, said arms having been yequally cut out to this purpose as shown in Fig. 8, so as to leave the lilm completely tree to be placed under the toldable shutter l Which during the printing holds itl in position relatively with the set of grips. Adjusting devices Z (Fig. 9) are provided on the sides ot the trame A, said devices partly covering the slots z' so as to leave tree only an opening corresponding to the Width ot the lilm 71..; to this purpose the device Z carries at right angles a small heel m, which engages the iilm /z, thus l'orcing it to enter the slot and always move parallelly to the printing opening D oit diaphragm C. The screws a permit ot the device being lixed after adjustment upon the trame A, and the extremities are bent as shown in 0, m` (Fig. 9) to allouv tor a lrcc and easy movement in adjusting. rlhis disposition makes it possible `to print successively all the negatives of the [ihn or only a certain number ot them, without the necessity oit cutting the lilm.

Naturally the form, dimensions and materials may be varied according to requirements.

I declare that what I claim is:

l. A photo printing trame tor lilm negatives comprising a trame, provided with means to resiliently hold a transparent sheet disposed at its bottom; a sizing diaphragm out out in its central portion, a rigid U shaped shutter hingedly connected on the one side to the trame, arm extremities on the U shaped shutter, locking organs iixed on the opposite side of the trame and engaging upon the said arm extremities to retain the shutter in its closed position, a releasable spring controlled linee lever shaft carried by the shutter, a set of grips to hold the negative in its adjusted position disposed in the thickness of the U shaped shutter, a

set ot' grips traversing the thickness ot the shutter and adapted to hold the positive in its adjusted position, a releasable spring controlled linee lever shal't carrying the latter grips, a toldable shutter lilling up the cut out portion between the arms ot the U shaped shutter and hingedly connected to it, a spring bar disposed on the arms oiz the U shaped shutter for keeping the said toldable shutter in its closed position, iilm guiding means on the i'raming and on the U shaped shutter, and a plurality ot reference marks disposed on the thickness ot the U shaped shutter abutting With the said toldable shutter.

2. A photo printing trame tor lilm negatives comprising a trame provided with means to resiliently hold a transparent sheet disposed at its bottom, said means comprising a groove ruiming along the inside and at the bottom of the frame, fixed bent blade springs mounted in the groove and having a width equal to the width of the groove towards the bottom of the frame whilst on top of the groove the springs protrude sutlioiently to receive and maintain the transparent sheet; a. sizing diaphragm out out in its central portion; a rigid U shaped shutter hingedly Connected on the one side to the `frame; locking means for retaining the U shaped shutter closed in its working position; arm extremities on the U shaped shutter adapted to be engaged by the said looking means and to allow the passage of a lilm negative, a releasable spring controlled knee device carried on the said shutter and disposed in the thickness o1 the U shaped shutter to hold the negative in its adjusted position, a releasable spring Controlled knee lever shaft, a set of grips carried hy the latter shait and traversing the thickness of the shutter to hold the positive in its adjusted position, a foldable shutter filling up the out out portion between the arms of the U shaped shut-ter and hingedly eonneeted to it, a spring bar disposed on the arms of the U shaped shutter to keep the foldable shutter in its Closed position, and film guiding means on the 'framing and on the U shaped shutter.

3. A photo printing frame for lilm nega.- tives comprising a frame provided with means to resiliently hold a transparent sheet disposed at its bottom; a sizing diaphragm out out in its central portion; a rigid U shaped shutter hingedly connected on the one side to the frame7 arm extremities on the U shaped shutter, looking organs carried on the frame and engaging upon the arm extremities of the U shaped shutter and adapted to allow the passage of lilm negatives7 a releasable spring Controlled knee lever shaft carried by said shutter, a set of grips provided on the said shaft and disposed in the thickness of the U shaped shut 'ter to hold the negative in its adjusted position; a seeond releasable spring controlled knee lever shaft, a set of grips provided on the latter shaft and traversing the thickness of the shutter, to hold the positive in its adjusted position, a oldable shutter filling up the out out portion between the arms of the U shaped shutter and hingedly oonneoted to it, a spring bar disposed on the arms of the U shaped shutter to retain the vfoldable shutter in its closed position, slots being provided on the opposite sides ol' the frame and corresponding grooves being provided on the arms of the U shaped shutter and slidably and adjustably mounted oontrolling squares mounted upon the 'frame and adapt-ed to engage the iilm edges; and a plurality of reference marks disposed on the thickness ot' the U shaped shutter abutting with the oldable shutter.

In testimony whereof I have hereunto ailixed my signature.

LON CRAYSSAG.

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