US1568344A - Apparatus for making photographic films - Google Patents

Description

4 Sheets-Sheet 1 /m/f/Yraes C. .5. MOODY Jan. 5 1926.

C. S. MOODY El' AL APPARATUS Fon MAKING BHoToeRAPI-uc FILMS Filed July 11, 1924 Tam.

A rra/PNE v5 Jan. 5 1926.

C. S. MOCDY El' AL APPARATUS Fon MAKING PHOTOGRAPHIG FILMS Filed July 11, 1924 4 Sheets-Sheet 2 Jan. 5 1926.

C. s. MODY ET AL APPARATUS FOR MAKING PHOTOGRAPHIC FILMS Filed July 11, 1924 4 Sheets-Sheet 3 4 Sheets-Sheet 4 ffal 57\ Filed July 1l c. s. MOODY Er AL APPARATUS FOR MAKING PHOTOGRAPHIC FILMS Jan. 5 1926.

Patented Jan. .5, 1926.

UNITED STATES A!! 1,568,344 PATENT OFFICE.

CLARENCE S. MOODY AND WILLIAM OEPTS, OF ST. LOUIS, MISSOURI, ASSIGNORS TO HARRY L. GBIESEDIECK, OF ST. LOUIS, MISSOURI.

v APPARATUS FOR MAKING PHOTOGRAPHIC li'ILMS.

applicati@ ined-July 11, 1924. semi No. 725,492.

To all whom t may concern.'

Be it known that we, CLARENCE S. MOODY and WILLIAM OEP'rs, citizens of the United States of America, and residents of the city of St. Louis and State of Missouri, have .invented certain new and useful Improvements in Apparatus for Making `Photographic Films, of which the following is a full, clear, andv exact description, reference being had to the accompanying drawings,

forming a part of this specification.

This invention relates generall to apparatus `for and methods Vof making photographic film, and particularly to an apparatus of the tvpe mentioned. which is so constructed an arranged that a film base may be handled in a manner to permit of the application to both surfaces thereof in a single operation of sensitive or insensitive emulsions. The invention realizes its greatest utility in the making of all sensitized photographic film which -is used in a flat condition where it is essential, or at least desirable that it should be absolutely flat when in use. It is well known that foi certain purposes photographic films are made in individual sheets of a size Suitable for use. These films are used in a flat condition, and prior to this invention it was practically im sible to obtain films which would lie abso utely fiat. The reason that these films would not lie fiat resulted from the fact that said films were coated with an insensitive emulsionon one surface only and this caused buckling of said films. The present invention contemplates, application i to both surfaces of the film base of coatings of emulsion, whereby the tendency of said films to buckle as described is eliminated.

In making photographic film with our improved ap aratus we may coat `both surfaces of the lm base with a sensitive emulsion. This would be done in the case of film for X-ray purposes, which` is made more effect-ive by a sensitive coating on both sides; or we may provide the film base with a sensitive coating on one of its surfaces and au insensitive coating on its other surface. In the latter case the insensitive coating is only ap lied for the 'purpose of Off-setting the ten ency of the single sensitive coating to cause Vthe film base to buckle.

Another object of the invention is to ro'- duce an Vapparatus of the class descri ed, which is provided with means adapted to `its greatest utility in the making of films in individual sheets, it is to be understood that roll film may be made thereon, and because Oftlie arrangement of said apparatus, the necessity of festooning the strips of which the roll films are composed to permit same to dry is eliminated.

With the foregoing and other objects in view, the invention comprises the novel construction, combination and arrangement of parts hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown `the `preferred embodiment of the invention. However, it is to be understood that the invention comprehends changes, variations and modifications which come within Vthe scope of the claims hereunto appended.

Fig. I is adiagrafhmatic view of our improved film-making a paratus, showing the manner in which the film base passes through the apparatus.

Fig. II is a fragmentary vertical section of the feeding end of the apparatus.

Fig. III is an enlarged fragmentary view partly in side elevation and partly7 in sect e appation, showing the feed rolls of ratus.

Fig. IV is a fragmentary vertical section of the end of the4 apparatus opposite to the feeding end thereof.

Fig. V is a fragmentary side elevation, showing the means for driving the feeding rolls.

Fig. VI is a plan view of the feeding end of the apparatus, a portion of the supporting arm of one of the bearings which supports the upper feed roll being broken awa Fig. VII is a horizontal section showing the manner in which the film base is gripped by the gripping deviceassociated with the sprocket chains. g

Fig. VIII is an enlarged fra mentary perspective showing the gripping evice associated with the sprocket chains, together with the means whereby said gripping device is caused to open.

Fi IX is a cross section on line IX-I of Fig. VIII. Y

Fig. X is a fragmentary perspective showing the mechanism for shifting the roll of lm base to obtain the proper alinement thereof.

Fig. is a cross section on line XI-XI of Fig. VI.

Fig. XII is a cross section on line XII-XII of Fig. VIII.

In the drawings, A designates our improved film-makin apparatus which is provided with a mem er 1, on which a roll of film base B is mounted, said film base usually being formed of a transparent material such as Celluloid. The apparatus is provided with a suitable frame and the member 1 is supported by said frame in any desirable manner. The apparatus A is provided with a housin C, which is of a peculiar shape, said housing having the general shape of a reversed letter S. The hous ing C is divided into several compartments, the upper one, which is designated by the reference character D, being the setting chamber of the apparatus and the interina' diate and lower portions of said housing comprising a drying chamber E. To rovide for the circulation of air through the drying chamber E we provide said chamber with an air inlet passageway F and an air outlet passageway G (Fig. I).

Supported by the frame of the apparatus in any convenient manner 1s a plurality of rotatable shafts 2, 3, 4, 5 and 6, and arranged on each of the shafts 3, 4, 5 and is a pair of smooth wheels which are designated by the reference characters 3', 42.5 and 6'. The smooth wheels which comprise the pair of wheels on any one of the shafts mentioned are spaced apart from eachother. In other words, said smoothed wheels are located adjacent to the opposite ends of said shafts. Mounted on the shaft 2 is a pair of toothed wheels 2', which, like the smooth wheels, are spaced apart from each other. All of the smooth wheels at one side of the ajparatus and the toothed wheel at that si e of the ap aratus are in alinement with each other, an arranged to operate over the sets of alined wheels is a pair of endless sprocket chains 7. From the fore ing it is plain that there is a sprocket chain at each side of the apparatus and that said sprocket chains pass over the wheels 5', then rearwardly through the u per portion of the setting chamber C an around the wheels 4', then forwardly through the lower portion of said setting chamber and around the wheels 2 and then rearwardly through the upper portion of the drying chamber and around the wheels 3 and then forwardly through the lower portion of the drying chamber and around the wheels 6 to the wheels 5. The toothed wheels 2 on the shaft 2 constitutes the means for driving the sprocket chains 7 and it is apparent that when said chains are in operation they will travel through the S-sliaped housing of the pparatus, as indicated by the arrows in Arranged on the innermost face of each of the sprocket chains 7 is a plurality of gripping devices 8. These gripping devices each comprise a pair of jaws 9 and 10, the jaw 9 being stationary with respect to the link with which it is associated, said jaw preferably being an integral part of the associated link of the sprocket chain and the jaw 10 being ivotally secured to said jaw 9. Associated with each of the pivoted jaws 9 is a spring 11, which is so arranged that it tends to close the jaws 9 and 10. .Each of the pivoted jaws 10 of the gripping devices is provided with a portion 10', which extends outwardly from said jaw, saidportion being for a purpose to be hereinlfter set forth.

Arranged adjacent to the wheels 5 is a pair of stationary curved bars 12 which are secured in any suitable manner to the frame of the apparatus. There is one of the curved bars located adjacent to each individual wheel 5', and said bars are so arranged and shaped that as the sprocket chains 7 move over the wheels 5 jecting portions 10 associated with the pivoted jaws 10 will move under and behind said bars 12. It will be noted that each of the bars 12 is provided with an end portion 12 which curves inwardly toward the center of the apparatus. The location and shape of these curved portions 12 is such that the projecting portions 10 on the pivoted jaws of the traveling gripping devices will pass under and behind said curved portions 12 of the bars 12, and because of the'curvature of said portions of the ri ping portions of the pivoted jaws 10 will e caused to move away from the gripping portions of the stationary jaws 9 as shown in Fig. IX. During theperiod that the various gripping devicesV are passing the curved bars 12 the jaws are retained in an open position, but as soon as any one of said gri ping Vdevices has passed beyond one of said curved bars the spring 11 associated therewith will cause said jaws to be closed. It will be apparent from this that the jaws of the various gripping devices are retainedV in a closed position at all times by the springs 11, except when the projecting por tions -10' contact with the curved bars 12, when said jaws will be open. Located ad jacent to the wheels 6 is a pair 0f Statiom the proary curved bars 14 which are similar to theY bars 12 already described. The bars 14 are so shaped and arranged that the jaws 9 and 10 of the gripping devices will be opened by said bars, as already described in connection with the bars 12.

As already stated, the film base material is arranged 1n a roll and said roll is mounted on a member 1. The strip of film base material passes from the roll over the roller 15 and then along the bed member 16 of the machine to the feed rolls 17 and 18, be-

of base material, and as a result thesprocket` chains 7 carry the strip of base material with them as they pass through the housing C of the machine.

terial has completed its passage through the hopsing C of the apparatus it reaches a polnt adjacent to the wheel 6', where rthe jaws of the gripping devices are again opened, this time by the curved bars 14, and

said strip of base material is permitted to again move independently of the' sprocket chains. 1

Located at a point which is between the feed rolls 17 and 18 and the point where the strip of film base material enters the housing C of the apparatus, is an apparatus 20 by means of which sensitive or insensitiveemulsions are spread on the upper surface of the strip of film base material. The

apparatus 20 may be of any suitable type,

the one illustrated in the drawing comprxsing a reservoir 21, a tube 22, a perforated member 23, a spreader 24 and a valve 25 for controlling the flow of liquid from the reservoir 21 to the perforated member 23.

As the strip of base material passes beneath the apparatus 20, emulsion flows from the perforations in the member 23 onto the upper surface of said strlp. The strlp, of course, is moving at this time and it passes beneath the spreader 24, whereby thehemulsion is distributed over the entire surface of the strip in the form of a thin coating.

After the emulsion has been applied to theV upper surface of the strip as described, said strlp passes into the setting chamber D of the apparatus. The setting chamber D is provided with a plurality of pipes 26,

through which a cooling fluid, such as ammonia, passes. During the passage of the film base from the setting chamber D the When the film base macoating of emulsion placed on said film base of the apparatus 20 becomes set through the action of the cooling fluid in the pipes 26. When the strip of film base reaches therearj most'end of the setting chamber D, said 70 strip passesaround the wheels 4 and then moves in a forwardly direction. This-has the effect of inverting the film base. In other words, it presents the uncoated face of the film base, which was the lowermost face as said film base entered the setting chamber, uppermost. i

Arranged within the setting chamber, between the first and second flights of the strip of base material, is a second emulsion- Spreading apparatus 27. The emulsionspreading apparatus 27 is an exact counterpart of the spreading apparatus 2() already described, there being a reservoir 28, a tube 29, a perforated member 30 and a spreading V85 member 31. As the strip of base material passes beneath apparatus 27 emulsion is deposited on the uncoated face of said strip, and as said strip continues to move relative to the spreading member 31, said emulsion will be distributed to form an even coating on said strip.

Ity is now plain that after the strip of base material haspassed the second emulsion-spreading apparatus 27 it is provided D5 with. a coating of emulsion on both of its surfaces, and said strip is then passed into and through the drying chamber E. As already stated, the drying chamber is provided `with an air inlet and an air outlet, and during the passage of the strip of base material through said drying Fchamber air is caused to pass through said drying chamber for the purpose of dryingthe coatings of emulsion on the strip of' base material. 105

It will be rememberedthat the curved bars 14 are located adjacent to the wheels 6 and it is therefore plain that as the various grippin'g devices approach said wheels 6 the 'jaws will be opened to release the strip of 110 base material.V This will permit the strip of base material to continue in a 'straight line `and the chains to travel upwardly to- Y ward the wheels 5', as shown in Figs. I and II.

Located adjacent to the wheels 6 isa receptacle 30 containing `a plurality of lightroducing elements, such as electric light ulbs 31". The receptacle 30 is open at the top so that the electric light bulbs may cast light rays through the Istrip of film, thus permitting said strip of film to be inspected. It is,-of course, a parent that the electric light bulbs 31 wiil be of a color which will not injure the sensitized film. `126 H designates a putting mechanism which may be of any suitable type, said cutting mechanism preferably comprising a stationary die member 32 and a periodically actuated dielmember 33. In operation the 133 disk 34, which is operated in synchronism with the movement of the strip of film, periodically deprcsses the movable die member 33 to cut individual sheets from the strip of film. the remainder of the strip of iilm being wound on the roll 35, as shown in Figs. I and II.

ln the operation of our improved filmmaking machine it is of the utmost importance that the strip of base material B be taut during the coating and drying operations, and to cause the strip of base material to be drawn tightly in a lateral direction We employ a pair of trackways 36 through which those portions of the sprocket chains 7 which are for the time being located between the feed rolls 17 and 18 and the setting chamber l) pass. The trackways 36 are rectangular in cross section and are each provided with a slot 36 which extends from end to end of said trackway, through which slot the jaws 8 of the gripping devices extend (Fig. VII). By referring to Fig. VI it Will be seen that the oppositely disposed trackways 36 are closer together at the feed rolls than they are immediately adjacent to the setting chamber I). As has already been explained, the gripping devices grip the strip of base material immediately as it leaves the feed rolls. The distance between the oppositely disposed sprocket chains is then gradually increased, due-to the fact that said chains are traveling in the trackways 36, which diverge from each other as they approach the setting chamber D, and as a result of this the `strip-'of base material is stretched in a lateral direction as it moves toward said setting chamber. The chains 7 are arranged t-o travel through trackways 37 which extend through the entire housing C of the apparatus, which trackways are similar to and in continuation of the trackwavs 3G. It is apparent, in view of this, that the lateral spacing of the chains is maintained through the apparatus, whereby the strip of base material is maintained in a taut condition throughout its passage through the apparatus. It is, o f course, apparent that the trackways 37 within the housing C are spaced the` same distance apart as are the trackivays 36 at their widest point.

To cause thestrip of base material to be drawn tightly in a longitudinal direction we provide means for actuating the feed rolls 17 and 18, which is so arranged that said feed rolls have a peripheral speed, which is relatively slower than the speed at which the sprocket chains move. This results in a dragging -or hollding back on the part of the feed rolls, w lereby the strip of base material is drawn taut ,as it passes into the setting chamber D. The means for causing the feed rolls to rotate at a relatively lovv rate of speed as compared v'vith the s eed of the sprocket chains comprises a. pu ley 39 on the feed shaft 2 of the a )paratus and a pulley 40 which is supporte by the frame of the machine at a point adjacent to the feed rolls 17 and 18. A belt 41 is arranged to operate over said pulleys 39 and 40 so that movement is transmitted from said pulley 39 to said pulley 40. Mounted on the shaft on which the pulley 40 is mounted is a sprocket Wheel 42, and mounted on the shaft on which the feed roll 18V is mounted is a larger sprocket Wheel 43. Arranged to travel over the sprocket Wheels 42 and 43 is a sprocket cham 44, by means of which rotary movement is transmitted to said feed roll 18. The shafts on which the feed rolls 17 and 18 are mounted are provided with pinions (Fig. V), whereby motion is transmitted from one of said shafts to the other. From the foregoing it is plain that, in view of the relatively large s rocket wheel 43 on the shaft on which t e feed roll 18 is mounted, said feed roll will be rotated at a rate of speed which is relatively less than the rate of speed at which the sprocket chains 7 travel. Y

To provide means whereby the stripmf base material may be guided, we employ means illustrated in Fig. X whereby the roll of base material may be shifted laterally of the apparatus, said means comprising a verticall arranged oscillatory shaft 50 providedv with a member 51 at its lower end, having a bifurcated portion which extends into an annular groove formed in the collar 52. The collar 52 constitutes a part of the member 53 on which the roll of film base material is wound and said member 53 is movable longitudinally of the shaft 1 on which it is mounted. 54 designates an operating lever Which"is attached to the upper end of the vertical shaft 50, and 55 designates a toothed segment, which is adapted to retain the lever 54 in any desired position. It is apparent from the foregoing that by moving the outer end of the operating lever `54 in anarc of a circle the member 53 may be moved along the shaft 1 to guide the strips of base material being drawn there# from and to properly aline said strip with respect to the apparatus.

As an additional means for guiding the strip of base material, as it leaves the roll on Which'it is wound, we employ a bar 56 `which 1s pivoted to the frame of the machine at the point designated by the reference character 56. The bar 56 is L-shaped in cross section and is arranged in suchv osition on the machine that an ed e o the strip of base material contacts Wlth a face of said bar as said strip moves toward the feed rolls. The frame ofthe machine is provlded with an upstandng lug 57, which 1s located adjacent to the pivote-d bar 56, and `a. threaded member 58 passes through a threaded opening in said lug. The threaded the course of the strip of base material may Y the roll 17 on the strip member 58 bears against the pivoted bar 56, as shown xin-Fig. VI, and it is plain that a shoe 59 III) arranged above said shaft and a vertically movable threaded member 60 which passes throu h a threaded ears a ainst' opening in the bearing 'and said shoe 59. Located below'the sha is a coil spring 61 which is interposed between a shoe 62 and a fixed member 63 at the lower end of the bearing. It is a parent from the construction shown in same to move downwardly, the pressure of of base material will be increased atA the end of said feed roll which is adjacent to the -adjusting mechanism just described. Itis also plain that by causing the threadedv member 60 to move upwardly the pressure of the feed roll on the strip of base material will be decreased ,I as the coil spring 61 will move said feed roll upwardly. By manipulating the adjusting mechanism just described to increase or decrease the pressure of the feed roll at the edge of the strip of base material, it is apparent that the pat-h of travel of said strip of base material will be altered.

1. In an apparatus for making photographic film, means whereby motion is imparted to a strip of base material, means whereby a coating of emulsion is applied to onesurfoce of the moving strip of base material, a-setting chamber through which said coated Strip of base material. passes, means whereby a coating of emulsion is applied to the other surface of said moving strip of base material, and a drying chamber through which said strip of material passes to dry said coatings of emulsion.

2. In an apparatus for making photographic film, means whereby motion is imparted to a strip of base material, means whereby a coating of emulsion is applied to one surface of the moving lstrip of base material, a setting chamber through which said coated strip of base material lplasses, means within said setting chamber w ereby a comparatively low temperature is maintained therein, means whereb a coating of emulsion is applied to the otlyier surface of said moving stri of base material, and a drying chamber t rough which said strip of ig'. III that by` Arotating the threaded member. 60 to cause material passes to `dry said coatings of emulsion.

3. In ain apparatus for making photographic lm, means whereby motion is imparted vto a strip of base material, means whereby a coating of emulsion is applied to one surface of the moving strip of base material, a setting chamber through which the coated strilp of base material passes, means within sai setting chamber whereby a comparatively low temperature is maintained therein, means whereby a coating of emulsion is applied to the other surface of said moving strip of base material and a drying chamber throu h which said stri of' material passes to ry said coatings o emulsion,

said drying chamber being provided with i means adapted' topermit a current of air to pass through said drying chamber.

4. In an ap aratus for making photographic film, xible traveling means rovided with gripping jaws adapted to gripa strip of base material whereby said strip of base material is caused to travel with said flexible traveling means, means whereby a coating of emulsion is applied to the uppermost surface of said strip of base material while said strip is in motion, means whereby the course of travel of said flexible traveling means is directed in a manner to oinvert the strip of base material, and means where- Y by a coating of emulsion is applied to the uncoated surface of said moving strip of base material.

5. In an apparatus for making photographic film, flexible means provided with Igripping jaws adapted to grip a strip of base material, whereby said strip of base material is caused to travel with said flexible traveling means means whereby a coating of emulsion is applied to the uppermost face of said strip of base material, a setting chamber through which said coated strip of base material passes, said setting chamber being provided with means whereby a com aratively low temperature is maintained t erein, means whereby the course of travel of said flexible traveling means is directed in a maiiner to invert the strip of base material carried thereby and means whereby a coating of emulsion is applied to the uncoatedl surface of said strip of base material, and a drying chamber through which said coated strip passes to dry said coatings of emulsion thereon, said drying chamber being provided with an air inlet and air outlet to provide for a current of air therethrough.

6. In an apparatus for making photographic film, flexible traveling means provided with gripping jaws adapted to grip a strip of base material whereby said strip of base material is caused to travel with said traveling means, means whereby both surfaces of said strip of base material are provided Witli coatings of emulsion while said strip is in motion and means whereby said strip of base material is drawn taut. in longitudinal direction,` said means comprising feed rolls arranged to rotate at a rate of speed which is relatively lower than the rate of speed at which said flexible means travel. p

7. In an apparatus for making vphotographic film,' flexible traveling means provided with gripping jaws adapted to grip a strip of base material, whereby1 said strip of base material is caused to travel with said traveling means, means associated with said travelin means whereby said strip of base materia is drawn tatin lateral direction, means whreb said strip of base material gripped by said flexible traveling means is drawn taut .in longitudinal direction, and means for applying a coating to said strip While it is so held in the taut condition.

8. In an apparatus for making photographic film, flexible traveling means provided with gripping jaws ada ted to grip a strip of base material, where y said strip of base material is caused to travel with said traveling means, means associated with said traveling means whereby said strip of base material is drawn taut in lateral direction, means whereb. said strip of base material gripped by said flexible traveling means is rawn taut in longitudinal direction, said means comprisin feed rolls arranged to rotate at a rate o? speed which is relatively lower than the rate of speed at which said flexible means travels, and means for applying a coating to said strip while it is so held in the taut condition.

9. In an apparatus for making photographic films, traveling means provided with gripping devices adapted to grip a strip of base material to cause said strip to travel with said traveling means, and means for applying coatings of emulsion to both surfaces of the strip of base material while said strip is held by said gripping devices and caused to travel with said traveling means. v

10. In an apparatus for making photographic lilm,traveling means provided with gripping jaws adapted to grlp a strip of base material to cause said strip izo-travel with said traveling means, means for apply- ,Y

ing coatings of emulsion to both surfaces of the strip of lbase material while said strip is held by said gripping jaws and caused to travel with said traveling means, and means comprising curved bars for periodically opening said jaws.

In testimony that we claim the foregoing we hereunto atlix our si atures.

CLARE CE S. MOODY. WILLIAM OEPTS.

strip is in motion and means whereby said strip of base material is drawn taut in longitudinal direction, said means comprising feed rolls arranged to rotate at a rate of speed which is relatively lower than the rate of speed at which said fiexible means travel.

'i'. In an apparatus for making photographic film, flexible traveling means provided with gripping jaws adapted to grip a strip of base material, whereby said strip of base. material is caused to travel with said traveling means, means associated With said traveling means whereby said strip of base material is drawn tautfin lateral direction, means whreb said strip of base material gripped by said flexible traveling means is drawn taut in longitudinal direction, and means for applying a coating to said strip while it is so held in the taut condition.

8. In an apparatus for making photographic film, flexible traveling means provided With gripping jaws adapted to grip a strip of base material, whereby said strip of base material is caused to travel with said traveling means, means associated with said traveling means whereby said strip of base material is drawn taut in lateral direction, means whereby said strip of base material gripped by said flexible traveling means is rawn taut in longitudinal direction, said means comprising feed rolls arranged to rotate at a rate of speed which is relatively lower than the rate of speed at which said flexible means travels, and means for applying a coating to said strip while it is so held in the taut condition.

9. In an apparatus for making photographic films, traveling means provided with gripping devices adapted to grip a strip of base material to cause said strip to travel with said traveling means, and means for applying coatings of emulsion to both surfaces of the strip of base material while said strip is held by said gripping devices and caused to travel with said traveling means.

10. In an apparatus for making photographic film, traveling means provided with ofripping jaws adapted to grip a strip of base material to cause said strip to travel with said traveling means, means for applying coatings of emulsion to both surfaces of the strip of base material while said strip is held by said gripping jaws and caused to travel with said traveling means, and means comprising curved bars for periodically opening said jaws.

In testimony that we claim the foregoing we hereunto aflix our si atures.

CLARE CE S. MOODY. WILLIAM OEPTS.

. Certificate of Correction.

It is hereby certified that the name ot the assignee in Letters Patent No. 1,568,344, anted J anuarv 5, 1926, upon the application of Clarence S.` Moody and William epts, 0f St. Louis, Missouri, for an improvement in Apparatus for Making Photographic Films, was erroneously written and printed as Harry L.` Griesedieck, whereas said name lshould have been Written and) rinted as Henry L. y Grz'esedz'eck, as shown b the records of assignments in this o ce; and that the said Letters Patent should i e read with this correction therein that the samei may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day of February, A. D. 1926.

WM. A. KINNAN,

Anti/rtg Omnmz'so'ner of Patents.

Cnicate of Correction. I

Itis hereby certified that the name of the assignee in Letters Patent No. 1,568,344, ganted January 5, 1926, upon the application of Clarence S. Moody and William epts, of St. Louis, Missouri, for an improvement in Apparatus for Making Photographic Films,71 was erroneously Written and prin/Led as Harry L. Griese dieck, whereas said name should have been Written and) I'inbed as He'my L. Gm'esedieck, as shown by the records of assignments in this o ce; and thail the said Loti/ers Patent Should be read with this oor'rection therein that the same may conform to the record of the case in the Patent Oce.

Signed and sealed this 9th day of February, A; D. 1926.

[snm] WM. A. KINNAN,

Acting mnmissio'rwr of Patents,

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