US1711333A - Automatic printing continuous-strip machine - Google Patents

Description

April 3o, 1929. C, A, SWENSON 1,711,333

AUTOMATIC PRINTING CONTINUOUS STRIP MACHINE Filed Aug. 20, 1926 4 Sheets-Sheet 1 Fig? IN V EN TOR.

lA TTORNEYS.

v April 30, 1929. c. A. swENsoN 1,711,333

AUTOMATIC PRINTING CONTINUOUS STRIP MACHINE Filed Aug. 20, 1926 4 Sheets-Sheet 2 9 INVENTOR 'Cdr/2. MMI/wn, 'l

BY 77?? ATTORNEYS.

April 30, 1929. Q A SWENSQN 1,711,333

AUTOMATIC PRINTING CONTINUOUS STRIP MACHINE Filed Aug. 2o, 1926 4 sheets-Sheet 5 IN V EN TOR.

" wmfw= ATTORNEYS.

misses M April 30, 1929 c. A. swENsoN AUTOMATIC PRINTING CONTJINUOUS STRIP MACHINE 4 Sheets-Sheet 4 Filed Aug. 20. 1926 Don. m E V W ATTORNEYS.

Wivese's;

Patented Apr. 30, 1929.

UNITEDl iSTATES PATENT OFFICE.

CARL A. SWENSON, OF SPRINGFIELD, ILLINOIS.

AUTOMATIC PRINTING CONTINUOUS-STRIP MACHINE.

My invention relates to devices adapted to bensed for a photographers 'convenience in printing small or large quantities of photographs from one or more negatives at a time and in printing the same to-print a title on each picture lat the same time the photographic print is made from the negative when such title is desired on the photograph.

A particular object of my invention is to provide an automatic printing machine particularly adapted to print photographs from negatives which in every movementrequired is motor driven and in every detail of arrangement of the operating parts, provided with means wherebyl the device of my invention may be operatively threaded with a roll 0f photographic sensitized paper, and the like, after which the actuating motor therefor may be started and after making suitable adjustment to provide for a predetermined optional time exposure for the prints from a negative, letthe machine run without further manual eifort while it intermittently feeds, prints and trims in successive order the sensitized paper in predetermined sizes as it comes from the supply roll and accomplishes the Vdesired results with speed and uniformity in all photographs and prints made in the device of my invention.

A further object of my invention is to provide in a device for the purpose mentioned, a v means of adjustment of the operating position ofthe trimming knife and the method of operating the saine; whereby prints when made may be suitably trimmed with accuracy and in predetermined sizes.

A further object of my invention is to provide in a device of this character a means of relieving the lighting chamber of warm air and blowing this air, with the same blower that relieves it from the air chamber, through the space normally existing between the negative within the printing frame and the sensitized paper registering under the frame after each successive intermittent exposure, 'in order thereby to keep the negative and sensitized. paper each clean and otherwise in condi-tion for uniform, satisfactory printing.

A further object of my invention is to provide in an automatic printing machine, a`

means of mechanically controlling the movement of a roll of sensitized paper through an automatic print-ing machine and to make such movements intermittently so as to uniformly and successively print a plurality of predeterhmined like sizes and when moving the sensitized paper through the printing process to so coordinate the operative control of the trimming knife as to cause the knife to trim in successive accurate order each exposed photograph at the same instant that an exposure is being made on a section of the sensitized paper which follows the trimmed photograph through the printing machine.

A further object of my invention is to provide in a device of this character, a means not only of mechanically holding down the cover for the printing frame during the time exposure of the print but also to automatically release the cover of the frame to permit the exposed sensitized paper to move on through the rollers which intermittently control its movement and to the trimming knife which trims the exposed paper into predetermined sizes. v

A further object of my invention is to provide in an automatic printing machine of this character a means of automatically trimming the rolls of sensitized paper into predetermined widths before it goes into the printing frame and to automatically rewind thatportion of the roll of sensitized paper not needed when running a printing operation Where a given size of print is' being made.

A further object of my invention is to provide in a device of this character, an arrangement for automatically printing titles' upon photographs at the same time that the photograph is being' printed.

I attain the objects of my invention in the device described in the annexed specification, recited in the claims and illustrated iii the accompanying drawin s in which likereference numerals indicate like parts in the several figures.

Referring to the drawings:

Figure 1 is a perspective of the assembled automatic printing machine of my invention.

Figure 2 is a side elevation of my device.

Figure 3 is a top view of my invention.

Figure 4 is a front view of my device. p

Figure 5 is aperspective showing in detail the drive shaft for my printing machine operating from a motor driven Worm gear showing 1n connection therewith the detail of the several arts of my device adapted to be mechanica ly actuated thereby.

Figure 6 is a perspective showing the operating relation etween' the resilient rollers adapted to control the movement of the sensitized paper through the printin machine and the ratchetmember adapted to intermittently control the rollers.

Figure 7 is a perspective showing the method of automatically trimming the rolls of sensitized paper into predetermined Widths before it is permitted to run through the printing frame and showing also an arrangement for rewinding those parts of sensitized paper that may not be neededvin the printing of photographs of given size.

Figure 8 is a vertical cross section through the center of the printing machine of my invention. Y

Figure 9 is a longitudinal section A to B (see Figure 4) -of my invention.

Figure 10 is an illustrated circuit diagram showing the successive steps through which the sensitized paper moves during the intended manner of operating the automatic print- 'ing machine of my invention.

Referring to the details of my device and to their operating relation as Well as to the intended function of each part when in normal use in the assembled device, I provide a metallic casing for housingI and supporting the cooperating details of structure Where with a roll of sensitized photograph paper after being mfounted therein may be intermittently moved through a printing frame, exposed to the printing light for a predetermined period of time, intermittently moved from the printing frame to a trimming knife and trimmed into prints of predetermined size, producing each operation in successive order with each print gettin a like time exposure, the duration of whic exposure is optional with the operator and during these printing operations the prints are made with speed if .desired and with uniformity in printing results in cach succeeding photographic print.

To photographers and others interested in the art of photography it is a Well known fact that .were photograph printing is done by hand there are usually difficulties to encounter that are annoying, such as producing inaccuracies and the lack of uniformity in printing results where many photo .raphs are desired from one negative and so ar as it is possible and practical a mechanical control for everyoperation required for the production of a large quantity of photographs from one negative,it is desirable for the sake of securing speedier results and more uniform and satlsfactory prints from the negatives.

Heretofore,'it has been diicult tofsecure graphs for the reason that certaln mechanical operations much needed were missing in some devices adapted to mechanically print photographs.

A further need in printing a quantity of photographs from one negative has been to be able to print titles on photographs while the photograph is being printed, a need which is suitably taken care of in my automatic printing machine.

In fact, the merits of my device will be appreciated by photographers of experience when it is realizedthat from the time the sensitized paper starts from the supply roll mounted in a cabinet below the printing machine until it has passed through the printing frame through the resilient rollers and the trimming knife the paper is not necessarily touched by the hand to accomplish this much needed improvement in the art of photography. I provide a metallic casing -1- mounted on a. cabinet 2 to which it is adapted to be hingedly connected at hing paper fiis pulled supply roll 7- on which the sensitized 4 paper is normally mounted in a roll. The resilient rollers -5- and -6- are actuated by a ratchet -8- connected through ratchet driving rod -9- to a crank arm -10- to which ratchet driving rod -.9 is adjustably attached in adjustment slot 11-.

In my printing machine I provide a main driving shaft l2-l motor driven from motor -13- through the worm gears 111- and spur gear l5-'and it is this shaft to 'which driving connections for the printing machine of my invention are made.

Perhaps the best way to vappreciate the merits of my automatic printing machine Will be to follow the sensitized paper adapted to be printed by my device through the machine in each successive operation in which after threading the printing machine for operation in printing the sensitized paper, a switch v(not shown) adapted to control motor -13- is turned on to start the motor which turns shaft -12 through Worm gear -ll and spur gear -15-; which shaft also rotatesn crank arm -10- actuating ratchet connecting -rod -9- causing ratchet dog -8- mounted in ratchet arm -16- to move ratchet Wheel 17 which actuates resilient rollers -5- and -6 through cog 1S- and thus the sensitized paper is started in its movement through the printing machine.

It will be noted thatin the normal operation of my printing machine that the sensitized paper does not move through the machine in a steady motion but in order to acafter passing over guide comp'lish the desired results, it must be made to move through the printing machine in intermittent movements, short movements or long movements as may be required to suitably print photographs of predetermined size, it bein necessary, for instance, when printing a p lotograph of postal card size to produce intermittent movements of the paper each timesuliicient to enable the machine to print a neuT space each time on the roll of sensitized paper without double exposure through the negative on any part of the sensitized paper.

' We will now suppose that a plurality of prints are to be made from the roll of sensitized paper and for we will choose a negative from which to make prints of postal cards of standard size. Numeral -19- indicates a locking bar and control lever for the-printing cover.

Numeral -21-- is a control, arm adapted to actuate locking bar -19-. Numeral -22- indicates a printing frame cap. Numeral -23- guide pins, -24- printing glass and S25- a printing frame.

After detaching bar -19- from its engaging bracket and control arm 2lby sliding lthe ends of bar -19- sidewise out of the slots in the bracket and control arm printing frame cap of its guide pins 23 (one` at each four corners) after which,` the negative from which the desired postal card prints are to be made is suitably placed upon glass -24- in printing frame After starting sensitized paper -4--from roll 7 it is run over rod -26- and started through twin knives '-27- and -28- which are adapted to autornaticallyl trim said paper -4.- into the desired width of sensitized paper; and after these two knives trim the sensitized paper that portion of the paper which would otherwise go towaste is rerolled upon roll -29 -30- and from the trimming knives, paper Llpasses `de -31- up' over drum -32- of the cabinet and that the top of drum ---32V passes between adjustable guides -33- mounted on a rod for their adjustment from which guides the sensitized vpaper passes through the printing frame so as to suitably register over a negativev when prints are to be made and soa/s to be easily pulled through the printing frame by rollers -5- and -6- during each intended: movement of the paper after a print isto be made. After the paper passes through the printing frame between cap -22- and glass 2liin frame -25 and over a negative '-311- it passes a guide rod -35 adapted to suitably hold the paper into -proper moving alignment as it goes into rollers -5- and -6- which are adapted to actually cause the paper to move whenever it does move and the stake of illustration,

--22- is lifted oft' i which is mounted on kmove intermittentlyithrough' the ratchet action which controls the movement of these part of the printing machine ofmy invention the paper -4- will have been being cooperatively connected with the.

mechanical control thereof, so as to make the knife trim the exposed prints simultaneously with the exposureof other succeeding on the sensitized paper.

In the trimming knife part of my printing machine, I provide a blade -37,- mounted on a beam 38 and adapted to fio-operate in trimming with adjustable plate -39 over which the sensitized paper passes when being trimmed. This adjustable plate 439-- is mounted on a frame -40- which in turn is slidably mounted on a pair of supporting arms -4land -42- in order to provide horizontal adjustment and substantial suport for the trimmin knife.

It will be seen that eam -38- supporting the trimming blade -37- is supported at opposite ends on a pair of upright pins -43- and -44- operatively movable slidably through holes in frame 40- for the normal operative support of the same.

The lower ends of pins -43- and -44-4 are slotted and provided with a cross pin in prints each for the operative support of apair of slotted rocker-arms -45- and -46, each of a shaft -47- for the same, near opposite ends thereof. This shaft is re-enforced at its center of support by a bracket 4S-f. A

The trimming knife blade -37- is adapted to produce a scissors cut in its co-operative relation with blade -36- and this is accom- -plishedin the following manner z Shaft 4T is securely attached to rocker arms -45- and -46- and to rocker arm -49- and adapted to oscillate in bearings 5G- of the frame --40 of the knife'member and by observing Figures 1, 2, and 9, it will be seen that the means of controlling the intended movement of the knife is to be found in the normal action of driving shaft'-12- upon connecting rod -51- through cam -52- acting upon adjustable roller -53- ada ted to be suitably adjusted upon the loop endP-lof the connecting rod -51- which end is provided with a pluralityof notches on each side thereof adapted to make possible an o tional adjustment ofthe relative position o roller .-53# through which cam -52-7 controls the connecting rod -51- which in turn is connected to rocker arms -49--.

It will therefore be seen that when shaft -12- rotates with cam -52- cam causes roller -53.-, adjustably secured to 4 --37` and beam where it is connecting rod -51-withi`n notches -54-, to be lifted or dropped through the cams action on roller -53-.

When cam -52 lifts on connecting rod -51- through roller -53-, it causes the knife blade -37- to slidably move downward so as to trim paper -4- by making a shearing 37- and plateI -39-. But after the blade has trimmed paper -4-, springs -5- are adapted to automatically retract the blade 88- from contact with plate -3 0. (See Fig. 9.) p I have shown that the trimming knife when mounted in normal operation upon rods -41- and 42 is adapted to be horizontally adjustable upon those rods in order to provide arrangement whereb photogra hs Vmay be trimmed to any .suita le size wit in the limits of the printing machine to be used and when an adjustment is made f r a lar picture to be trimmed, it will be seen that t e lower end 56.- of connecting rod 5lwill be moved upward as frame 40- is' moved outward and when this is done roller .53- will be adjusted to take care of the control of connecting rod -51- through the rot-ation of cam -52- in order to effect the normal operation of the trimming lblade -37- controlled thereby in any adjusted po- 'sition in which the trimming frame may be placed within limits of horizontal adjustment possible on supporting rods, -41 and When knife blade -37- has trimmed off a piece of aper -4-, springs -55-' and 56- quic 1y retract or push up against bar -38- causing the knife blade to be'liftedv ready for another' cut.

' -55- and -56- are mounted are forced down during the trimming operation by a s- Atem of first class leverage when connect rod -51- pushes up on rocker arm -49- causing shaft -47- to rotate so as to make rocker arms 45- and -46- respectively, simultaneously pull down on pins -43- and on which bar -38-'- is supported carrying blade -37-.

Those who are experienced in the photographing art will understand that light unit 36- should be of high wattage, or the lighting chamber -57 provided with a group of lighting units in order to provide suiiicient illumination to suitably expose the print through the negative. When providing a very strong light in this chamber, it will be evident that the chamber would et very hot if some means were not provided got cooling off the lighting chamber and in this case, I provide in my automatic printing machine, a blower -58- which not only pulls the hot air out of the lighting chamber 57 but cut on the paper 'between blade connected with the' same; thus forces it through chamber 59- and through a slot 60- which registers in alignment with printing frame -25- so as. to enable blower 58- to intermitently force a strong movement of air across the printing frame between the negative 34- and the sensitized paper -4 each time cap -22- of the printmg frame is lifted from contact with the sensitized paper -4; thus enabling the intermittent draft of air across the printing frame to keep the negative clean.

In order to successfully make the'prints and have the printing operation suitably c0- ordinate with the mechanical control of the other essential cooperating parts of my automatic rinting machine, I provide for vertical s idable adjustment of control arm 20- which is adapted to normally pull down on printing frame cap -22, when making prints from negative -34- on sens itized paper 4 1 When in normal operation control arm 20- is caused to pull down 'on the end of rod -19- through pivotal mo- -cam -65- through roller 66- and by the system of .first class leverage acting on controlarm 20` causes control arm -20f to pull 'down on rod.. 19- for holding the printing frame cap down against the sensitized paper while the saine is being printed. After cam -65- releases roller +66- from its upward pressure thereon, -67- on each of the four pins -23 quickly p ush up on printing frame' cap 22` releasing the same-from pressure against sensitized paper `4-l held doWn against negatlve 34.- during the exposure of said printing paper..

`When blower -58- forces the warm air out of lighting cabinet -57- a fresh supply of'air is pulled into lighting chamber through slots `68- while lighting chamber 4,--57` is darkened through shutters (59-- Special attention is directed t0 the adjustable supporting block 74- adapted to hold roller --53` on connecting rod 5lin notches -54- thereof.

By referring to the circuit diagram in Figure 10, I disclose, .in a brief manner, the

is being lewound on musas 5 V working relation of some of the most essential parts of my automatic printing machine and in this circuit diagram, I illustrate a method of controlling light unit 3G- through a suitable switch member -75- which isadapted to be operated in relation t0 the ratchet control of resilient rollers 5 and -6- and a switch (not shown) for the purpose for which switch 75` is adapted to be so controlled as to be able to vary the duration of time during which the prints are tobe exposed to the light 36 through negative -34-.

One of the special conveniences of my automatic printing machine is provided in an arrangement whereby the photographer when printing photographs may very conveniently print titles thereon; a result which has been difficult to accomplish in suitable manner when printing photographs by hand.

It will be seen that drive shaft -12- is supported in brackets #76,- and -i7- and .that motor -`-l3- is mounted under the floor changed and still stay within the spirit and.

scope of my. invention but the preferred arrangement has been illustrated herewith in the drawings, land described in the above paragraphs of these specifications and rep cited in the claims which follow.

Having `thus'desci'ibed the nature of my invention, what I claim is.: l

l. An automatic printing machine comprising in cooperative combination, a detachable frame over an 'exposing light chamber, a cabinet mounting therefor and means .for intermittently compressing and releasing said frame automatically; 'mechanically actuatedresilient rollers engaging and movmeans ing strips of sensitized paper through the printing operation; mechanically actuated for trimming the printed paper; means for automatically regulating the width of paper to be printed; means for automatically forcing a current of air out of the exposing light chamber between said paper and a negative at each intermittent movement of the paper; means for holding said moving paper within a predetermined position., of alignment and automatic means for intermittently `controlling a printing light so as to make the exposurathrough the negative coincident with the intermittently arrested movement of the sensitized paper.

2. In an automatic printing machine of the character described having a detachable printing frame and cabinet mounting therefor; means for mechanically actuating a pair of operatively connected resilient rollers when said machine is in normal operation;

means for regulating the width of said paper; means for intermittently compressing and releasing said piinting frame during the printing opera-tion; means for automaticallyy trimming the printed paper after predetermined portions thereof have been en aged by and exposed in said printing rame,

means for intermittently arresting the movement of said sensitized paper to permit predetermined optional time exposure thereof; adjustable means for the automatic control of the duration of `time exposing said paper to the light, fan means for intermittently forcing a volume of air out of the light chamber between a negative in the printing frame and the portion of said sensitized paper registering over said negative; whereby said machine may be suitably adjusted for printing a plurality of photographs on said sensitized paper adapted to bemounted on a roll therein, and Whereb said machine may thereafter automatically feed, print, and trim said lsensitized paper with speed and uni-- formity in printing results in all photographs and vtitles printed thereby.

3. Inan automatic printing machine of the class described having a detachable automatically controllable printing frame mounted on a supporting cabinet therefor, v

a pair of contacting operatively connected roller membersadapted to movably engage and control the movement of sensitized paper, adapted to be printed therein, when said machine is in normal operation; means for simultaneously actuating, intermittently, said printing frame and said rollers; a switch controlled light actuated for exposing said sensitized paper; a mechanically actuated knife for trimming th printed paper; cutter means for regulating the size of paper to pass through said printing frames; adjustable guide means for regulating the position ofsaid moving sensitized paper; and a motor actuated fan for intermittently forcing a volume of air out of the lighting chamber between a negative in the printing frame and the position of said sensitized paper registering over said negative; whereby said machine may automatically feed, print and trim said sensitized paper with speed and uniformity in printing results in all photographs and titles printed thereby.

4. in an automatic printing machine of the character described having a detachable printing frame operatively mounted on a cabinet therefor, the combination with a pair of operatively connected resilient roller members adapted to engage and control the movement o sensitized paper, normally printed from rolls thereby, of a mechanically actuated knife for trimming the printed sensitized paper, adjustable guide members slidably mounted on cross rod for holding saidr moving paper within a predetermined position of alignment and a cutter member slidabl adjustable on lcross rods for automatical y regulating the width of paper to be printed, a motor actuated fan for circulating a current of air intermittently out of the lighting chamber between the printed paper and a negative registering therewith at each intermittent movement of the paper; and a simultaneously controlled switch adapted to automatically control the time exposure through said negative to said paper registering therewith coincident with the intermittent movement of the sensitized aper; whereby said machine may automatica ly feed, automatically print and automatically trim in successive order said sensitized paper with speed and uniformity in printing results in all photographs printed thereby.

5. In an automatic printing machine of the character described having a rinting frame operatively mounted on a ca inet therefor; the combination with a pair of operatively connected resilient roller members adapted to engage and control themovement of sensitized aper normall rinted from rolls thereby, o a cam control e `ratchet member adapted to intermittently control the movement o f said roller members and a cam actuated trimming knife; spring means for automatically lifting said printing frame after a printing operation, cam actuated lever means for urging down pressure on said printing frame during a printing operation adj ustableguide members slidably mounted on cross rod for holding said intermittently moving sensitized paper; adjustable cutter 'discs' cooperatively rotating in contact and adapted to automaticall cut said sensitized paper into rolls Aof pre etermined optional widths; a motor actuated fan for lcirculating a current of air intermittentl out of the light chamber between the print paper and a negative registering within the printing frame therewith said fan adapted to forcesaid current of air in each intermittent movement ofA said sensitized paper through the space existing between said negative and the paper, whereby the paper and negative may be kept clean and cool for each successive print;,a source'of light positioned within said cabinet adapted to register beneath' said printing frame; said lightl controllably connected with a mechanically actuated control switch operatively connected with-control means Vfor controlling the intermittent movement of said rollers and said knife whereby said machine may automatically feed, print and trim in successive order said sensitized paper with speed and ,ess

uniformity in printing results in all photo-l graphs printe thereby.

6. In an automatic printing machine having a mechanically actuated detachable printing frame, and a trimming knife adapted to be simultaneously controlled with the control of said printing frame, a pair of resilient engaging roller members adapted to no1-mally control the movement of rolls of sensitized photographic printing paper through said printing frame to said trimming knife; a pair of cooperating trimming discs adapted to automatically trim said printing paper into predetermined widths while said printing machine is in normal operation; a lighting unit and a switch therefor adapted to automatically and to intermittently expose said sensitized printing paper through a negative in said printing frame; a motor actuated fan adapted to normally direct a current of air intermittently out of the light chamber between said printed paper registering with said frame and said negative adjusted therein, whereby said negative and said paper may be kept clean for each successive print and means for simultaneously actuating said printing frame, saidrollers; said knife and said fan whereby said machine may lintermittently feed, print and trim in successive order said sensitlzed paper in predetermined sizes with s eed and uniformity in 4printing results in a l photographs printed thereby.

In an automat-ic printing machine ofy the character described having a detachable printing frame mounted in a. cabinet, a trimming knife simultaneously operative with said printing frame and means for rotatably supporting and automatically trimming -rolls of sensitized paper for photographic printing, the combination with'a pair of adjustable resilient roller membersffor controlling the movement of said sensitized paper throughout the printing and trimming operation therefor, of an automatically controlled lighting unit and switch therefor; means for compressing said sensitized paper by said printing frame while exposing the same, means for automatically releasin said frame after exposure, a motor contro fan for blowing a current of air from the light chamber through the space between a negative in said printing frame and said moving sensitized paper after exposure and means for automatically holding said moving sensitized paper within predetermined position of alignment; ad'ustable bracket means for the support of sai trimming knife whereby the operator may adjust the trimmove said sensitized' paper through said rollers While forcing a current of air between the. photographic negative and said moving roll of sensitized paper; whereby said machine may automatically feed, print and trim said sensitized paper With speed and uniformity in printing results in all photographs printed thereby. n

8. In an automatic printing machinel of the character described the combination comprising a printing cabinet, a detachable j'n'inting frame operatively mounted thereon, a pair of cooperating adjustable resilient rollers mounted on said cabinet by said" frame, a motor actuated adjustable trimming knife, a rotatable support and adjustable and rotatable trimming discs for a roll of sensitizcd photograph paper operatively mounted within said cabinet, a motor actuated blower mounted within a blower compartment of said cabinet, for releasing warm air from the light compartment, a motor driven cam for controlling -the normal operation of said trimming knife, an adjustable ratchet for controlling the normal movement of said rollers and a cam for normally holding down said printing frame during a printing operation, a lighting unit;- and a motor actuated switch for the control thereof ;Whereby after threading said automatic printing machine vwith a roll of said sensitized paper, the operator may start said control and fan motor and cause said machine to automatically feed said paper through said machine by the controlling movement ofsaid resilient rollers, expose said paper over a negative of predetermined size within said frame, automat-ically releasc said frame by spring means, blowing a current of air bet-Ween said negative and the exposed area of said sensitized paper and release Warm air from the light chamber, move said paper out of said printing frame through said rollers to said trimming knife and there trim off the exposed area of said'seusilized paper simultaneously with .the exposure of the next succeeding print as described.

9. In an automat-ic printing machine of the character described having a detachable printing frame mount-ed in a cabinet, and a pair of ratchet controlled adjustable resilient roller members for intermittently controlling the movement of sensitized paper through the printing machine, and means for mechanically controlling a light exposing the said sensitized paper through a negative adapted to operate in said printing frame, a trimming knife for mechanically trimming said sensitized paper, said. knife member comprising a cutting blade and cooperating plate, for trimming said paper, a y

vertically movable frame adapted to operatively control said blade intermittently, said cooperating plate adjustably supported by a horizontally adjustable frame mounted on a pair of horizontally disposed rods normally supporting the same; cam actuated lever means for operatively moving said blade in a cutting operation intermittently and spring means mounted on said blade supporting frame for automatically retracting said blade after the trimming operation, a cam actuated connecting rod controllably connecting said lever means Wit-h a control cam on a shaft, said connecting rod provided with aA plurality of pairs of adjustment notches and a detachable contacting roller adapted to be adjustable on the connecting rod and operatively controlled by said cam on a shaft; means for rotatably controlling the movement of said cam through a motor driven Worm gear; whereby said automatic printing machine may intermittently feed, print and trim in successive order said sensitized paper in predetermined sizes with speed and uniformity in printing results in all photographs printed thereby.

j In witness whereof, I hereunto set my hand this lst day of July A. I). 1926.

. j, CARL A. S'WENSON.

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