US1125680A - Photographic-printing machine. - Google Patents

Description

B. 0. PJORKENSTAD.

PHOTOGRAPHIG PRINTING MACHINE.

APPLIOMION FILED JUNE 5, 1914.

1 ,7125,680. Patented Jan. 19, 1915.

2 SHEETS-SHEET 1.

THE NORRIS PETERS CQ. PHOTC-LITHO., WASHINGTON. D. C.

B. 0. FJORKENSTAD.

PHOTOGRAPIIIG PRINTING MACHINE.

`AVPILICAI'IOII FILED JUNE-,5, 1914.

A 1,125,680. Patented JaII19, 1915.

-2 SIIB'ETs sHBIIT 2.

THE NORRIS PETERS CO.. PHOTG-LITHD.. WASHINGTON, D. C.

, BERNARD o.V FJORKENSTAD, or ritieni., souiHnAKoTA.

rHoToGRArHIc-PRINTING' MACHINE.

Specification of Letters Patent.

` Patented Jan. 19, 1915.

Application led .T une 5, 1914. SeriaL1"N0`.8r43,179.

l Machine, .of which the following isa full,

clear, and exact description.

This invention relates to improvements in photographic .printing machines designed especially for printing on developing papers and the primary vobject lof the invention is to provide a machine designed especially for printing on developing paper where speed, accuracy and uniformity-'of resultsaredesired whether used with Anatural or artificial light.

A further object vof the rinventionis to provide an improved? photographic printing machine which isprimarily :intended to be placed in the lowerV part of anordi-nary window and toindirectly receive the light rays, 'the window `being covered 'around the machine so that no light can enter "the room and the upper part of the window being equipped with a red or orange colored light which will onlyallow non-actini'c rays of light to venter the room'and still enable the operator to see his work without'danger .of injuring the negative for sensitized paper. v Y

A still further 4object ofthe invention Vis to provide an improved photographic printing machine whichy includes an inclosure or frame having `a shutterA movable in' fron-t thereof to admit for exclude vthe light, either natural or artificial, va holder for thenega-V tives includinga movable 'part or lever cooperative with means for openingthe shutter so that while the l'negairve isbeingplaced in position only thenon-actinic rays'will be p admitted 'to illuminate the areaf'inthe room and the negativesufiicient to permit lthe operator to properly adjust the negative yand sensitized paper and whereby a further movement ofthe lever will open the shutter to admit the printing light while the release of the lever permits the shutter lto close 'by gravity when the printing operation is completed. v Still further objects of the invention, among others, areflto provide lnovel means for lholding thenegative and developing or sensitized paper in position and to accu rately adjust the same., vas well `asto provide a' ynovel construction v`permit'tiinfg theloperator to conifenientlydo vignetting by blotting out portionsy of the negative or .to regulate the intensity ofthe light which is reflected on to the negative.

` vViththeia-bove Yand otherobjects in view, the invention resides in the peculiar combination and' arrangement of parts to `be hereinafter vmore fully described, illustrated and-claimed, it being also an `object to providea device which islsimp'le in construction, durable-.and efficient in operation yand not likely to'fget out of working order.

'Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of ref erence indicate corresponding parts in all the views, and in which v Figure 1 is a perspective view -of my'improved photographic printing machine with portions thereof broken away; F ig. 2 is a plan view ofthe machine partlyy insection asf shown )in Fig. 3 ;r Fig. 3 is a sectional view taken on the line 3 3 of Fig. 2; Fig. 4; is a view similiar to Fig. 3 `but showing the lever for actuating the negative and paper-holding pad or .platen to move to a position to cause the opening of the shutter for admitting Ilightgtothe machine; Fig. 5 is a sectional view taken on the line 5.-'5 of Fig. r3; 6 is ascctional view taken on the line 6;(3 .of Fig. l .but showing the lever and pad Vcarried thereby raised and .the shutter lowered.

In carrying my 4invention into practice the device is installedin the lower part of a wind-'ow frame l0 or adjacent to any other i suitable source of light, either natural .or artificiahbu't Vin the present instance supported upon a'shelflor the like 11A constitutinga support which is built into the window orattached to it lby mea-ns of brackets or otherwise. The lower sash is indicated by the 'numeral -12 and th'elower half of the window is entirely darkened around the Inachine'jso that no light can enter the room througl'i-this part of the window, while the vcleats 14 at a spaced distance from yits sur` rounding front edge to fit in the window frame :and serve as :attach-ingmeans for the dark covering between the same and the window frame, such coveri-ngbeing made of dark paper, cloth or glass. This inclosure is of rectangular construction eXcept for an inclined bottom part 15 and is elongated inwardly, the outer side of the inclosure being open and supporting a frame 16 vertically above the inclosure at the front. closure and frame are provided with vertically alined grooves forming guideways 17 which receive a shutter 18 for vertical sliding movement therein, said shutter being of darkened material such as pasteboard except for a small yellow light or screen 19 for excluding actinic rays and permitting illumination by non-actinic rays only therethrough. The interior of the inclosure forms a reflector, being painted or covered with a reflecting material such as white enamel including an inclined partition 2O which is disposed at a proper angle therein to reflect the rays of light vertically toward the top of the inclosure and which if desired may be in the form of a mirror or burnished metal. rJ'Che inside or back of the inclosure is indicated by the numeral 21 the same including a hinged door 22 at the top portion which is adapted to swing rearwardly, said door when open communicating with the space beneath the reflecting partition 2O and the bottom portion of the inclosure.

Transversely of the inclosure in rear of the frame 16 and depending into the inclosure is a cross bar 23 which serves as a stop member to limit the downward or closing movement of the shutter by gravity due to the Contact of a transverse strip or cleat 24 on the inner side and at the upper edge of the shutter, therewith. At the opposed inner sic es of the inclosure horizontal guide strips 25 are provided forming guideways at the top part of the inclosure to removably support and hold a pair of spaced plates 26 which are preferably of glass, the plates being thus limited against inward movement by the cross bar and being held from outward displacement by the door when closed and secured in this position as by means of fasteners 27 at its opposite ends. The coacting edges of the inner portion 21 and the door 22 are provided with center recesses 28 communicating with each other to accommodate the crank portion 29 of a crank shaft 30 journaled or pivotally mounted transversely through the inclosure as by means of spaced center bearings 31 and outer bearings The crank 29 normally projects outward and is accommodated in the notch formed by the co-acting recesses while the ends of the crank shaft are provided with forwardly .projecting arms 33 which are inclined downwardly and 'forwardly andare in turn connected at their free ends by rods 34 to the extremities of a cross head 35 fixed to the strip 24.

The door 22 is provided with a vertical The in-H opening 36 communicating with the bottom recess to receive a headed plunger 37 for vertical movement therein, the plunger having a prong or fork-shaped lower end, as shown at 38, to produce a yoke to straddle the crank of the shaft and rest thereon. Due to the weight of the shutter and the fact that the latter normally lowers by gravity, the crank will support the plunger in an upwardly projected position, this being effected by rotation of the crank shaft due to the downward movement of the arms 33 by the connection thereof with the shutter through the medium of the rods 34, while in order to open the shutter the plunger is depressed to cause the opposite movement of the parts from that described.

In order to hold the negative and developing paper in position when the paper is to be printed, a pair of spring clamps 39 are provided, the same being pivotally connected to brackets 40 carried by the cross bar 23 preferably near the ends thereof and curving downwardly to engage an angular paper guide 41 in the form of a square. This paper guide is engaged over the negative 42 after the latter is placed glass side down on the uppermost plate 26 and then the guide is placed in position over two edges of the negative to hold the latter against movement when the springs are engaged on the holder to exert downward pressure on the latter. Pivoted to the cross bar 23 intermediately the length of the latter is a lever 43, the hinge of the lever having inwardly projecting holding arms 44 to the free ends of which a pad or platen 45 constituting a paper holding means is pivotally connected, the inner face of the platen being padded or covered with cloth, as shown. Carried by the platen and projecting upwardly therefrom is a threaded stem 46 which passes through an aperture in the lever, while an eXpansible coiled spring 47 is engaged on the stem between the platen and the lever to normally space the latter from the platen, such spacing being capable of adjustment by means of a thumb nut 48 threaded on the stem above .the lever.

In operating the machine after it has been properly installed the lever is raised, as shown in Fig. 1 of the drawings, to engage between a spring clip 49 which is of U- form with out-turned leg portions and which is carried by the top portion of the frame 16 intermediate the width of the latter to project inwardly. rlhe platen is thus raised with the lever although the spring connection between the two permits movement of the lever relative to the platen when the same is lowered, and the negative being placed in position on the top of the inclosure and held by the paper guide and clamping springs in the manner described,

a sheet of printing; paper'. istheni plac'edfenA the Vnegative ag.a.-inst?the-2v guide andi the .lever lowered tol bring-the pad: or platen wfitlii-itfV striking and g-holdiiig; the@ paper iirmaly against thenegativa Duringthisti-me thel shutter with its translucent light lfQfLofayel-y low, orange; or! ruby fabricislowered softhat non-actinic rays only.` are allowed' to enter the machine to permit the* operatoiitof prop-` erly place the negative andwpaperinfposie' tion without` injuring.k the saine.y 'lhev lever then in;the..posi-ticn shoWnainfFi-g. Bof

- the drawings andi by moving itd'ownwa'rdly' Vtol engage the plunger the latter'may be:

depressed,as| shown ineFig.. 4L' of thefdrawings, to swing the cranl shaft'fin it'srbearin'gsr and elevatel thearmsf 23y so as.u to raise or open the shutter andpermitltheentranceofi actinicv light raysL for theproper-timejrequired' toY print the paper, when.: upon theV lever being. raised or released and' elevated by thespring47, theushutter will drop by gravity to shutz off? the; printing light rays and theplunger elevated. While thef shuttter is open the rays: enter-ingthroughvthe front of the inclosurewill'be reflected. by the interior walls thereof 1 and: particularly theY 1 inclinedl portion? or# reflector` 2.0; .l up'-l wardly on to the negative;

Although the'plates 26`are preferably of transparent glass so,` that the absorption of Y light reflected isa almostf` m'l,.sthe intensity ofthe light may be=regulatedbyf substituts' ing ai translucent or ground? glassvfor; the

lowerV plate should the lightr` bep-tooy strong, as for instance forthin negatives. In lieuv of substitutingthe kflowerplateby a translu-v cent plate which-permits: the .entrancey of actinic rays,- vignetting.- mayY be conveniently carried on by inserting a piece of tissuefpa-` per or other similar. light-softening mate f rialbetw'een said plates :by op.eningithe=door the top of the, inclosuretof support lutensilsl andy materialsfused'*during the printingand:rr

22, or by simply cuttinga.- holethe desired size-in a piecefof flight-proofpaper and in# sertingv the. same betweenv thev plates-or lights, the intensity of the f light f may be.- regulated or softened.. l/Vlienthenprinting.;

operation iscoinpletedfthe leverJis raised to vertical 'position and ther paperfandnega' tiveieleased and removed. n.

In order to useI the devicei and'` as` a re touching or spottingzdevice, the plunger is depressed to raise theshutter and therlever is moved to a vertical position or raisedandis provided with anv angular bracket=50 toy .engage beneath the stripor `cleatvl to' sup.` port-the shutter while admittingy the light either natural orA artificial. tov permitA the" op# eratorl ori photographerv to View the .worle A" pair of-slielves-51.-.are carried? by theinclosure, one at7 either side: in `a'linementwith' retouckhing operations-:1`

' Special advantages are held? toe-lie inaptheV supportiiigiof the lever fby the' spring sothat after thelever has been inovedl to bring1the platen in" contact with theV paper,. further movement ofv the same compresses' fthe" sive, whilejwhenfthe lever is raised theshut-` .ter is 4a-i-itoinatically loweredV` by releasing the plunger and actinic light rays are thusV ex. eluded or shut out so thatfurther handling of the negative and printing' paper. may continue without" danger of'injury thereto.

The machine is simple and-cheap in construction and has `no complicated parts .so that-moreaccurate and uniform results are assured. c l

Having. thus described my invention, whatr I' claim y is :f-

1. A photographic printing machine, comprising an inclosure,- said inclosure having anI opening at-its'A frontportion to permit the entrance oflight'to the inside thereof, a

shutter vertically movable in front oftheinclosure-'and` above the same, said. shutter having; a screen for excluding actinic` rays when the'shut'ter is over the opening, means atthe topnof the inclosure. for supportinga negative fwith printing paper thereon, means for z moving the shutter, and movable meansy for-holding the paper andnegative and suc'- cessively operating the shutter moving means tofopen the shutter.

2 z A photographic-printing machine, coin-` prising an.v inclosure, said inclosure having an opening` aty its front portion toy permit the entrance ofi light to the' inside thereof, a sli-utter vertically inovable'in front of the inclosureand above'tlie same, said shutter having .a screen for excluding' actinic raysI when thevshutter is overthe opening, means atthe top of the inclosure for supporting-.a

negative with printing paper thereon, means for moving the shutter, and mov-able means for holding the paper and-negative and successively voperating the shutter moving means to open.v the shutter, said shutterlbeing adapted to 'close by. gravity, wherebyY when `saidholdinginea-ns is disengaged from the shutter opening means the shutter willclose.

3. A photographic printing machine, comprising an inclosure adapted for disposal adj acent'toa source of light, a frame atthe front portionof the inclosure, a shutter movable inthe-frame to cover and uncover the front yportion of` the inclosuie, a reflector in.

thei inclosure above thebottomfthereof,a plurality offspacedplates inthe top'of the inclo'sureA to permit the entrance of light therethroughY and formi a: supportf feritanegativer andgpaper; to be printed therefrom,A

a lever pivoted to the frame and having a padded member to engage and hold the paper and negative, a crank shaft journaled transversely through the inclosure at the inner end thereof and having forwardly projecting arms connected to the shutter, a plunger operating through the inner part of the inclosure and engaging the crank portion of the shaft to rotate the latter upon the plunger being pressed to open the shutter, and means to hold the lever with its engaging member in a raised position.

4L. In a photographic printing machine, a substantially rectangular inclosure having an open front portion and an open top portion, cleats securedto the sides and bottom of the inclosure to permit the attachment of the latter within a window frame with lighteXcluding means therearound, a frame above the front end of the inclosure, said frame and inclosure having alined grooves forming guideways, a shutter vertically movable in said guideways and having a translucent screen permitting the entrance of non-actinic rays to the interior of the inclosure receiving light and said inclosure being interiorly provided with means to reflect the light to the top thereof, a door at the inner side of the inclosure adjacent the upper edge thereof, a pair of transparent plates removably supported in the top of the inclosure and adapted to support the negative and paper to be printed and to receive vignetting plates therebetween, means to removably retain said negative in position and including a guide for the paper, a plunger vertically movable in the door, a crank shaft pivotally mounted through the inclosure and engageable by the plunger whereby depression of the latter will rotate the sha-ft, arms projecting forwardly and downwardly from the shaft, rods connecting the arms to the shutter for raising the latter upon the plunger being depressed, said shutter being adapted to close by gravity and raise the plunger, and paper holding means carried by the frame and operative over the plates.

5. In a photographic printing machine, a substantially rectangular inclosure having an open front portion and an open top portion, cleats secured to the sides and bottom of the inclosure to permit the attachment of the latter within a window frame with lightexcluding means 'therearound, a frame above the front end of the inclosure` said frame and inclosure having alined grooves form` ing guideways, a shutter vertically movable in said guideways and having a translucent screen permitting the entrance of non-actinic rays to the interior of the inclosure, means within the inclosure whereby light rays entering therein will be reflected to the top thereof, a door at the inner side of the inclosure adjacent the upper edge thereof, a pair of transparent plates removably supported in the top of the inclosure and adapted to support the negative and paper to be printed and to receive vignetting plates therebetween, means to removably retain said negative in position and including a guide for the paper, a plunger vertically movable in the door, a crank shaft pivotally mounted through the inclosure and engageable by the plunger whereby depression of the latter will rotate the shaft, arms projecting forwardly and downwardly from the shaft, rods connecting the arms to the shutter for raising the latter upon the plunger being depressed, said shutter being adapted to close by gravity and raise the plunger," a lever pivoted to the front portion of the inclosure, a pad movable therewith and yieldingly connected thereto, said lever being adapted to be lowered whereby the pad will engage the paper to hold the latter in posi.- tion, and means carried by the frame to hold the lever in an upright position.

6. In a photographic printing machine, a substantially rectangular inclosure having anopen front portion and an open top portion, cleats secured to the sides and bottom of the inclosure to permit the attachment of the latter within a window frame with lightexcluding means therearound, a frame above the front end of the inclosure, said frame and inclosure having alined grooves forming guideways, a shutter vertically movable in said guideways and having a translucent screen permitting the entrance of non-actinic rays to the interior of the inclosure, said inclosure being adapted to receive light rays and interiorly provided with a reflector to reflect the light rays to the top thereof, a door at the inner side of the inclosure adjacent the upper edge thereof, a pair of transparent plates removably supported in the top of the inclosure and adapted to support the negative and paper to be printed and to receive vignetting plates therebetween, means to removably retain said negative in position and including a guide for the paper, a plunger vertically movable in the door, a crank shaft pivotally mounted through the inclosure and engageable by the plunger whereby depression of the la ter will rotate the shaft, arms projecting' forwardly and downwardly from the shaft, rods connecting the arms to the shutter for raising the latter upon the plunger being depressed, said shutter being adapted to close by gravity and raise the plunger, a'

lever pivoted to the front portion of the inclosure, a pad movable therewith and yieldingly connected thereto, said lever being adapted to be lowered whereby the pad will engage the paper to hol d the latter in position, said lever being adapted for further movement to engage the plunger and to depress the same and open the shutter, and means carried by the lever to engage the shutter to hold the latter open when the pad is raised. Y

7. `A photographic-printing machine, comprising an inclosurehaving an inclined bottom portion near its inner end, an open front portion and a top portion, an inclined partition in the inclosure to cause the reflection of light toward the top, said top portion permitting the passage of light therethrough, a shutter for the front portion of the inclosure, depressible means at the inner end of the inclosure for opening the shutter and adapted upon being released to permit the shutter to close by gravity, an angular guide adapted vto engage a negative on the top, means carried by the inclosure Vto hold the guide in position, a lever pivoted to the inclosure at the front and having arms projecting inwardly therefrom, a

platen havingk a padded engaging face, said Y platen being pivoted to the arms and having a stem adjustably connected to the lever, means betweenthe lever and the platen for raising the lever, said lever being adapted to be lowered to engage the paper to be printed whereby the latter is held against the negative and in proper alinement by the guide, further downward movement of the lever engaging said shutter operating means, means to hold the lever in a disengaged position, means to support the shutter in an open position, and shelves at opposite sides of the inclosure.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

BERNARD O. FJORKENSTAD.

Witnesses:

L. G. NAYES, C. T. BoLs'rAD.

Y Copies of this patent may be obtained for five centsV each, by addressing the Commissioner of Yatents,

Washington, D. C.

Images