US1191321A - Film-mending device. - Google Patents

Description

W. H. KUNERT.

FILM MENDING DEVICE.

APPLICATION FILED JUNE 2. 1915.

1 1 9 1 ,32 1. Patented J 1 18, 1911;.

'2 SHEE HEET 2.

WILLIAM H. KUNER'I, OF MINNEAPOLIS, MINNESOTA.

FILM-MENDING DEVICE.

Specification of Letters 1atent.

Patented July 18, 1916.

Application filed June 2, 1915. Serial No. 31,712.

To all whom it may concern:

Be it known that I, WILLIAM H. KU- NERT, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Film-Mending Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the splicing of fabrics and more especially to adhering seam-forming; and, the immediate purpose had in view is to provide a device for use in mending moving picture films.

To the above end, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout their several views.

Referring to the drawings :-Figure 1 is a perspective view of the device and a combined scraper blade and lifting pin, as used in holding a film to trim one of its broken ends and remove the emulsion along the trimmed edge portion, the severed broken end portion of the film being indicated by broken lines; Fig. 2 is a plan view of the device as used in holding the trimmed end portions of the film overlapped to receive cement in making a splice-joint; Fig. 3 is a perspective view of the device as used in holding the film while the cement is setting at the splice-joint; Fig. 4 is a perspective view of the bed-plate; Fig. 5 is a transverse section taken on Fig. 3 between the intermediate and right hand clamps; Fig. 6 is a detail View in section taken onthe line :0 m of Fig. 1; and Fig. 7 is a fragmentary view in perspective of the film at the splice-joint.

The numeral 1 indicates a rectangular base, having rigidly secured thereon a bedplate 2 of similar form, but of less dimensions on all sides. In actual usage of the device the base 1 may be rigidly secured, by screws 3 to a table top or other suitable support, not shown. End and intermediate film clamping plates 4 and 5, respectively,-

are edgewise spaced from each other and secured, by hinges 6 and 7, respectively, to the rear edge of the bed-plate 2 for vertical swinging movements, transversely of the bed-plate and for flat engagement therewlth. Spring latches 8, secured, by a clamplng bar 9 to the front vertical portion of the bed-plate 2 are provided for interlocking engagement with the free ends of the clamp-' their ends to a plate 11 by passing the same through pairs of slots formed in said plate, as shown in Fig. 4. The plate 11 is rigidly secured by screws or other suitable means to the vertical back portion of the bed-plate 2. The other ends of the springs 10 are passed loosely through small retaining brackets 13, secured, on to each of the clamping plates 4 and the other end of the other spring '10 is loosely extended into the clamping plate 5, which is tubular in cross-section.

Four rectangular spaced, upwardly projecting alining pins 14 are anchored to the bed-plate 2 under each clamping plate 4. Also, anchored to the bed-plate 2, on each side of the clamping plate 5, is an alining pin 15 of the same form as the alining pins 14. These alining pins 15 are alined with the rear row of alining pins 14. In each clamping plate 4 is formed a plurality of apertures 16 into which, the alining pins 14 project when the clamping plates are closed.

The front and rear rows of alining pins 14 are spaced transversely on the bed-plate 2, a distance corresponding to the distance between the two rows of longitudinally spaced sprocket holes 17 in the film 18. Each group of alining pins 14 and the adjacent alining pins 15 are spaced apart, longitudinally of the bed-plate 2, distances corresponding to multiples of the longitudinally spaced sprocket holes 17 .By thus transversely and longitudinally spacing the alining pins 14 and 15, the same will enter the two rows of sprocket holes 17 and firmly hold the film 18 against both endwise and edgewise movements. Preferably, the alining pins 14 and 15 are slightly tapered toward their upper ends, so that they will readily enter the sprocket holes 17. The two groups of alining pins 14 and 15 are also spaced from each other a distance that will hold the end portions of the film 18, overlapped, a distance corresponding to the distance between any two longitudinallyspaced sprocket holes 17, which is the width of the splice-jolnt to be made.

In making a splice-joint in a moving picture film, the importance of having the longitudinal edges thereof, in true alinement and the spacing of the sprocket holes 17 accurate is thought to be apparent. In case the longitudinal edges of the film 18 are not properly alined, the teeth of the sprocket wheels of the film-feeding mechanism are liable not to enter the sprocket holes 17, thereby causing the film to travel edgewise, in which case the teeth of the sprocket wheels traveling over the body of the film will cut. and spoil the same. The sprocket wheels of the feeding mechanism are also liable to leave the sprocket holes 17 of the film 18, in casethe spacing of the sprocket holes 17 at the splice-joint isnot' properly made. Also, in case the splice-joint is unnecessarily wide, the stiffness of .the same will cause the film -18 to leave the sprocket wheels of the feeding mechanism.

On the right-hand end of the bedplate 2 is a cutter comprising fixed and movable shearing blades 19 and 20, respectively. These shearing blades 19 and 20 extend transversely of the bed-plate 2 and are pivot ally connected, at their inner ends. The cutting edges of the fixed shearing blade 19 are located in the plane of the upper face of the bed-plate 2 and the free end of the movable shearing blade 20 is equipped with a hand piece 21. These shearing blades 19 and 20 are of a length suflicient to extend on either side of the film 18 so that the film may be transversely severed by a single movement of the shearing blade 20. The cutting edges of the shearing blades 19 and 20 are spaced, from the adjacent groups of alining pins 14 and 15, a distance that will cut the film 18 at one sideof any pair of transversely spaced sprocket holes 17. It is also important to note that the right-hand edge of the adjacent clamping plate 4 is spaced from the cutting edge of the shearing blades 19 and 20, a distance corresponding to the width of the splice-joint to be made in the film 18.

In the trimming of the broken ends of the film 18, the film is placed on the bed-plate 2, with its prepared side up, and before the end portions of the film 18, which is to form the under section of the splice-joint is removed from the bed-plate 2, the emulsion is removed therefrom outward of the clamping plate 4. The scraper blade 22 or a special tool, having a lifting pin 23, is provided for this purpose. In removing the emulsion from the film, the same is first wet and then removed by the scraper blade 22, the adjacent edge of the right-hand clamping plate 4 acting as a guide for said scraper blade. It will be noted that the outer end of the scraper blade 22 is beveled rearward from its point so that the same will scrape the emulsion from the film close to said clamping blade and in a straight line, transversely of the film 18.

As previously stated, the broken ends of the film 18 are severed on lines at one side of the sprocket holes 17, and the width of the splice-joint is the same as the distance between any two longitudinally spaced sprocket holes 17 Ordinarily, it is only necessary to cut out one picture in the trimming of the broken ends of the film. To make a perfect splioe-joint itiSneceSSary to trim the end portion of the film which is to form the upper section of the splice-j oint, so that that portion of the picture corresponds to that portion of the picture destroyed by the removing of the emulsion. I

To assist in trimming the broken ends of the film 18 in order that the picture at the splice-joint will be perfect, there is placed on the base 1, under the cutter 1920, a mirror 24 secured in position by any suitable means. The operator, by watching the reflection of the picture on the film in the mirror 24 may very quickly and accurately position the film on the bed-plate 2 over the alining pins 14 and 15, in order that the film will be properly trimmed to form a complete and perfect picture at the splice-joint.

After the ends of the film 18 have been properly trimmed, the same are placed on the bed-plate 2, over the alining pins 14-15, which holds the same in true longitudinal alinement with the end portion of the film,

" having the emulsion removed, overlapped by the other end portion of the film sufficiently to make the required splice-joint. In this position of the film 18, the clamping plates 4 are turned down thereon pressing the film, on either side of the splicejoint onto the bed-plate 2. In this position of the clamping plates 4, the same are secured against the tension of their springs 10 by the latches 8. Suitable cement is then applied, by a small brush 25, to the end portion of the film 18, from which the emulsion is removed. While the cement is thus being applied, the other end portion of the film 18 is held raised by the lifting-pin 23, as shown in Fig. 2.

To facilitate the lifting of the film with the lifting-pin 23, a groove or tool guide 26 is formed transversely of the bed-plate 2, between the intermediately clamping plate 5 and the right-hand clamping plate 4 as shown in Fig. 2. This groove 26 extends forward of the front longitudinal edge of the film 18 .and by placing the point of the lifting-pin or tool 23 therein, and sliding the same away from'the operator, the respective end portion of the film may be very easily picked up and held, as shown in Fig. 2. After the cement is applied to the splice-joint, the lifting-pin 23 is withdrawn, allowing the engaged portion of the film to spring into contact with the cement covered portion of the splice-joint. The intermediate clamping plate 5 is then turned down onto the splice-joint, pressing the same onto the bed-plate 2 and secured inposition by the respective latch 8. The splice-joint is held in position a sufficient length of time to permit the cement to set.

To insure an equal pressure on the splicejoint, throughout its entire length, a facing of resilient material 27, such as rubber, is applied to the under face of the intermediate clamping plate 5. As shown, this resilient material 27 is tubular in cross-section and is adapted to be telescoped onto the clamping plate 5. To adjust the resilient material 27, with respect to the splice-joint, a piece of cardboard 28, or other suitable material, may be inserted between the under face of said clamping plate 5 and said resilient material.

The above described invention, while extremely simple and of comparatively small costto manufacture, has, in actual usage proven highly eflicient for the purpose had in view.

lVhat I claim is 1. In a device of the kind described, the combination with a film cutter, of a mirror so located below the cutter, that the operator may observe the relative position of the under face of the film and the cutter, and a clamp for holding the film while being cut.

2. In a device of the kind described, the combination with a bed-plate, of a film cutter carried by said bed-plate, means for holding a film longitudinally spaced on the bed-plate, with respect to the cutter, a mirror located below said cutter, and a clamp for holding the ends of a film on the bedplate while cementing the same together.

3. In a device of the kind described, the combination with a bed-plate, of a film cutter carried by said bed-plate, alining pins on the bed-plate, arranged to enter the sprocket holes of a film, for holding the film longitudinally spaced, with respect to said cutter, a mirror located below said cutter,

a clamp for holding the film on the bedplate and affording a guide-for a tool used in removing the emulsion from the fihn in making a splice-joint, and a clamp for holding the ends of the film while cementing the same together.

4. In a device of the kind described, the combination with a film cutter, of a mirror so located below the cutter that the operator may observe the relative position of the under face of the film and the cutter.

5. In a device of the kind described, the combination with a bed-plate having a guide for a tool used in picking up one of the end portions of a film while cement is being applied to the other thereof, of a pair of clamps for holding the end portions of the film on the bed-plate while cementing the same together.

6. In a device of the kind described, the combination with a bed-plate, of a' clamp for holding the ends of a film while cementing the same together, an elastic sleeve on said clamp, and a shimming plate insertible between said clamp and sleeve.

7. In adevice of the kind described, the combination with a bed-plate having at one end cooperating shearing blades, of a combined film clamp and tool guide on the bedplate, located inward of said shearing blades, the bed-plate between the shearing blades and the combined film clamp and tool guide affording a support for the film in re: moving therefrom a predetermined amount of emulsion.

8. In a device of the kind described, the" combination with a bed-plate, of cooperative fixed and movable shearing blades, said fixed shearing blade forming an extension of the bed-plate, and a film clamp thereon spaced from said shearing blade and affording a guide for a tool in removing a predetermined amount of emulsion from the film as the latter is supported by said fixed blade.

Intestimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. KUNERT. Witnesses:

CLARA DEMAREST, HARRY T. KILG RE.

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