US1273928A - Method of cleaning films. - Google Patents

Description

M. S. ROSENFELD. METHOD OF CLEAN1NG7 FILMS. APPLICATION FILED SEPT. a. 1916.

1 ,273,928. Patented July 30,1918,

3 SHEETS-SHEET I.

Attorney.

M. S. ROSENFELD. METHOD or CLEANING mms. APPLICATION FILED SEPT. 6. l9l6.

1 ,273,928. v Patented July 30, 1918.

3 SHEETS-SHEET 2.

Inventor Attorneys.

M. S. ROSENFELIJ.

METHOD or CLEANING FILMS. APPLICATION FILED SEPT. 6. 1916.

1 273,928. Patented July 30, 1918.

' 3 SHEETS-SljEET 3.

Attomcyl.

the line 66 of Fig. 5;

MAURICE S. BOSENFELD, OF NEW YORK, N. Y.

METHOD or CLEANING FILMS:

Specification of Letters ratent.

Patented July 30, 1918.

Application filed September 6, 1916. Serial No. 118,770.

To all whom it may concern:

Be it known that I, MAURICE S. RosanrnLo, a citizen of the United States, residing in the borough of the Bronx. county of Bronx; city and State of New York, have invented a new and useful Improvement in Methods of Cleaning Films, of which the .following is a specification.

The object of my invention is to provide means whereby a film will be thoroughly cleaned and dried before it is reeled.

This and further objects will more fully appear in the following specification and accompanying drawings considered together or separately.

I have illustrated my invention in the accompanying drawings, in which like parts are designated by similar reference characters in all of thefigures, and in which,

Figure 1 is a. diagrammatic side elevation of my invention;

Fig. 2 is an enlarged sectional elevation of the moistener, shown at e in Fig.' 1, the section being taken on the line 2-2 of Fig. 3;

Fig. 3 is a section on the line 3-3 of Fig. 2; 7

Fig. 1 is a top plan view of the moistener;

Fig. 4 is a bottom plan view in detail of a modification;

Fig. 4 is an elevation of the same;

Fig. 5 is a top plan view of the buffer;

Fig. 6 is a section of the sametaken 'on Fig. 7 is a rear elevation of the same; Fig. 8 is a top plan view of the feeder; Fig. 9 is a longitudinal section of the same, taken on the line 99 of Fig. 8; and Fig. 10 is an end elevation of the same. In the drawing, a indicates a support on which is mounted a reel 1) carrying the film c to be cleaned. From the reel 1) the film is led to a coating device (Z and thence to the moistener 6. From the moistener the film is carried to a buffer 7 where the coating and moisture are removed. Adjoining the buffer is a feeder g through above mentioned devices, and drives a take-up reel h to which the end of the film is secured.

The reel 1) is the usual spool on which the film is wound after passing through the projecting machine.

The coating device (1 comprises a frame .1; in which is mounted a pair of rolls 2. The

through which the film is led. The feeder draws the film faces of the rolls are of less'length than upward into and above thefdistance between the lines of sprocket openings in the film. These rolls are preferably composed of cork or some other suitable material, and before the film is passed through them, eachis given a thin coat of wax or other similar material. The wax coating may be applied by rotating the rollers in contact with a lump of "wax. or they may-be painted with melted wax which is allowed to harden.

The rolls 2 are rotated by the passage of the film between them. and as it passes partlcles of wax from the rolls will be deposited upon both sides of it. The wax will'adhere to the foreign matter on the film.

From the coating device (I the film is drawn through the moistener e. The moistener comprises a base 3 upon which is mounted a standard 4. Carried on the. standard is a tank 5 for containing a liquid, preferably tetrachlorid of carbon. with which the film is to be moistened. The tank is secured in place by a set screw 6. =To

the tank and communicating with the pad holder is a stand pipe 10 which is open at the top and extends above the surface of the liquid. A piece of wicking or other porous material 11 rests on the top of the stand pipe with one end depending downward in the pipe, and the other end immersed in the liquid. The liquid will be raisedby the capillary attraction'of the wick, and will be deposited drop-by-drop in the stand pipe and on the pad 8.

Slidably carried on'the standard 4. is a pad carrier 12, within which is supported a pad 13 of material similar to that of the pad 8. The pad carrier is provided with a stand pipe 14 which is in communication with the bottom of the pad 13, and extends the surface of the liquid in the tank 5. The stand pipe 14 carries a strip of wicking 15 similar to that carried by the standpipe 10, by means of which liquid is, by capillary attraction, deposited in the pad carrier. and by'capillary attraction carried to the top of the pad 13 which is similar in diameter tothe pad 8.

A spring 16 normallyholds' the pad 13 in engagement with the pad 8. A manually operated. lever 17 is provided for lowering the pad carrier 12 against the tension of the spring so as to separate the pads 8 and 13 when it is desired to insert the film between them. Suitable guide rollers are carried on the frame and support the film during its passage through the moistener.

If desired, a hood 7, Figs. 4 andl'", of plush or other suitable material may be placed over the ends of the pads 8 and 13 and be secured in place by spring clips 8.

From the moistener the filmis led to the buffer f. The latter is spaced a considerable distance from the former so as to allow the film to dry during its travel from one to the other.

The buffer comprises a frame 18 similar in every respect to the frame of the coating device, and consists of two side members l9, l9, and a base 20 which is secured to the support a. Mounted in the sides is a shaft 21 which carries a buff wheel 22 built up of disks of suitable material, clamped together. A shaft 21 carries a rag Wheel 23 which is composed of strips of chamois or other suitable material, which is clamped to the shaft with the ends forming the periphery of the wheel loose and. unat-'. tached. The loose ends of the strips of the wheel 23 engage the emulsified side of the film, and will reach into the minute cavities of such surface.

Mounted on one of the side frames 19, and over the rag wheel is a chamber 24, open at top and bottom. A block of suitable absorbent, polishing material, such as chalk or magnesia, is carried. in the chamber 24, and rests upon the face of the rag wheel, so that as the latter is rotated the strips of which it is composed, will wipe off and carry particles of the polishing material with them. The Wheels 22 and 23 are geared together, and the shaft 22 carries a pulley by means of which the buff wheels are driven. A pair of guide rollers 25, 25 are mounted in the frame and direct the film to the feeding device 9.

The feeder comprises a standard 26 carried on the support a, and on which is mounted a box 27. Within the box is mounted a roller 28 carried on a shaft 29 which carries a pulley 30. Projecting from the front side of the box is a lip 31 which carries a wiping surface 32. The wiping surface comprises a strip of felt or other suitable material secured to the lip in any desired manner.

Hinged to the top of the box'27 is a cover 33 which carries two rollers 34, 34, which, when the cover is in'place, lie one on each side'of the roller 28, and hold the film in engagement with said roller. The shaft 29 of the roller 28 is geared to the shaft of one or both of the rollers 34. The cover carries at its front end a lip 35 covered by a wiper 36, similar to those on the'box.

34 down on the film and holding it in close contact with the drive roller. The wiper 36 engages the top of the film, .and as it is drawn into the box both the top and bottom surfaces will be cleared of any foreign substances. holding the cover in place on the box;

The shaft 29 carries a pulley 39 which is geared to a pulley 40 on theshaft 21 of the buffer, and the bufierwheels 22 and 23 are geared together in any suitable manner.

From the feeder the film is wound upon the takeup reel h in the usual manner.

The operation of my improved method and apparatus is as follows:

The film passes through the device with its emulsified side uppermost.

The surfaces of the rolls 2, 2 are coated with wax and as the film passes between them the wax-will be caused to scale off and the minute scales will adhere to both sides of the film, and as the rolls are not as wide as the distance between the rows- 23, the coating will be nearly dry and thewheels which are traveling at a high rate of speed, will remove the wax and foreign substances to which it adheres from the film. The lower surface of the film being non-porous and waterproof, will be efl'ectively cleaned and dried by the ordinary bufi' Wheel 22. The emulsified surface of the film being pitted cannot be cleaned and dried by anordinary wheel, but the loose ends of the chamois strips of the wheel 23 will searchout. the cavities in the surface and dust them with the absorbent material carried on the strips. The flic f action' of the strips will brush the chalk m the cavities and from the film. Any chalk which may remain on the film will be wiped off by the wipers 32 and 36.

I The rotation of the feed rollers 29 and 34 will draw the film through the various de- There is a latch 38 for vices, and will drive the real It to take up In accordance with tbeprovilions of the no invention can be carried out in other ways without departing from the spirit of my chalk. v v

9; A method of cleaning photographic --inventin.' Having now demnbed my mventlon,

: what I claim as new and desire to secure films, apl' waxto esurface pf the-film, dissoi vin g fiie wax, and

byLetters Patent .as follows: 7

1. A method of cleaning 7 photographic which consists of the United States, is

,then-removingthewax.

surface of the film, mo

2. A' method of cleaning photographic films, which. co m applying the surface of the 'moisteningthe waxed surface, and thenremovmg the wax and moisture.

3. A method of cleaning photographic .films, which consistsina p1 surface of the e wax, and then removing'thewax, in v je-presence an absorbent substance.

films, which consis sin a p wax to'the ,surface of the film, disso vinfilt wax, and 'then remo the wax, in e presenceof a finely absorbent material; i,

5. A method" and then of chalk h 6. A method of cl p otographic films, which consists. in applying wax to the the waxed surface, and then removinge wax and moisture, in the presence of an absorbent substance;

in; p ymg wax to ace of the. the waxed wax to moving the "wax, waxto e photographic ofgicleaningphotographic I films, in applying -wax to the surface of the film, the wax, removing the wax, in the presence methodp ogr ph v fifllmfs, which surface,

moisture, inthe presence of chalk.-

8. A method of films, which'consists in applying-wax to the surface of the film, moistening the waxed surface, and then remo thewax. and

moisture, in the presence 0 divided films, which in wax to the surface of the film, moving the wax and polishing the surface of the film, and then removing the polishing 10. A method films, whichconsists ina plying waxto the ace moving the wax, and the surface of the film withan absorbent material. 7

11. A method of films, which consists surface of the wax, re-

of the film with a finely divided material.

12. A method of cleaning photographic which consists el y dimo ving the wax, re-

and removing the wax v cleaning photographic do of cleaning photographic ofthe film, dissoving'the'wax, re-

I es

cleaning photographic, inapplying'wax to the and pohshing the'surface.

inc, plying wax to the surface of'the film, ving thewax, re-

mo the wax,'an'd the of the fill'n' with a fine'y divi ed. absorbent material. 13.'A method of cleaning photographic films, which consists in a ipl wax to the surface-of thefilm, e wax, rea moving the wax,'. and pohshing the surface of thefilm with'chalk,

14. A-method of j material to the surface dissolv ing the same, and then removing'sald plastic material. thi e ti f A 1916 a "o ROSENFI'HJ).

M, Nascmn,

H. Joins.

. cleaning hotographicfilms, which consi 'inaptgying a plastic of e film as ification signed e witnessed

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