US1716774A

US1716774A - Apparatus for winding cinematographic or photographic

Info

Publication number: US1716774A
Authority: US
Publication date: 1929-06-11
Anticipated expiration: 1946-06-11

Description

APPARATUS FOR WINDING CINEMATOGRAPHIC OR PHOTOGRAPHIC FILM BANDS 'J. HALLA ,I me 11, 1929.

Filed July 6, 1925 2 Sheets-Sheet l J. HALLA' June 11, 1929.

APPARATUS FOR WINDING CINEMATOGRAPHIC 0R PHOTOGRAPHIC FILM BANDS Filed July 6, 1925 2 Sheets-Sheet 2 Patented June 11, 1929. V

UNITED STATES PATENT OFFICE. l

JOSIP HALLA, OF LAGREB, YUGOSLAVIA.

Application filed July 6,

This invention relates to an improved apparatusfor winding photographic or cinematographic film-bands.

lileretofore photographic or cinematographic film-bands were wound upon a contrally disposed shaft, which rotates about its axis. lhcreby the band is subjected to tension and the individual windings of the film-band bear directly on top of one another, so that the diameter of the film-band roll is gradually increased.

This mode of winding up the film-band has the drawback that, owing to the superposition ofthe windings in direct contact with each other, the said windings are subjected to an injurious friction. In consequence of the increasing diameter of the film-band roll and the difiiculties resulting in the circumferential speed at a steady number of rotations of the shaft, special auxiliary devices have to be employed, in order to remove the said difiiculties.

Now the present invention has for its object the production of an improved apparatus, in which photographic or cinematographic strips or bands, particularly cinematographic film-bands, are arranged in spil'ttl-WlHClillgS in such a manner, that a clear and predeterminable space is left between the spiral windings for allowing the development of the film-band and which are maintained continuously in this position by a convenient lifting device, and further the present invention relates to a means for carrying out the method just described.

As only the borders of the film-band are secured, the entire image-surface of thefilmband c2 n be treated with the chemical fluids and subjected to a drying air-eurrent without any difficulty, thus ensuring a quick and uniform treatment of the film-band.

With small alterations the means above mentioned can be employed as a device for winding up film-bands and may be used on kinematographic projection-apparatus, and by employing this device the film-band is wound-up in such a manner, that is is ready for use for the next performance without requiring rewinding. Therefore also endless film-bands, e. film-bands in which the beginning and end are pasted together to form a loop, may be employed, which is of particular advantage in the case of film-bands for advertising purposes, as the same may be 1925. Serial No. 41,795.

the present invention is constructed in such a a manner, that the film-band is arranged in close spiral-windings, which do not contact with each other, in order to prevent the injurious frictional eontactbetween surfaces.

Owing to this arrangement the surface of the film-band is not'loaded and the latter rests on one of its lateral borders only. The device according to the present invention can be arranged on anyprojection-apparatus beside one of the common winding-up devices, which may be placed intooperation in case the filmband is torn in two during the performance.

Two modes of carrying out the present invention are shown by way of example on the accompanylng sheets of drawings in which i Fig. 1' is a vertical sectional view through the device for developing film-bands,

Fig. 2 illustrates the device shown in Fig. 1 in plan view, and I Fig. 3 a detail view thereof. Y Fig. 4 illustrates the guiding of the beginning of the film-band along a winding previously produced.

Figs. 5 and 6 show in sectional elevation and plan view respectively the device for winding-up and simultaneously winding-off endless film-bands.

Fig. 7 is a diagrammatic and perspective view of the device illustrated in Figsih and 6.

The device shown in Figs. 1 to d essentially comprises a base-plate 1 with a frame 2, corresponding in size to the oircinn'ference of;an entirely wound-up film-band. By means of pins 5 andG, radially disposed rollers 4 are rotatably mounted in bearings 23 secured to the base-plate 1 and in the said frame 9.. .On the pins 5 are mounted bevel wheels 7,-which are in mesh with a common bevel-wheel .8, the rotary shaft 9 of the latter passing through the base-plate 1 and being rotated by the aid of a driving disc 10, secured to'the outer end of the said shaft 9. A bevel-wheel 11 is fixed to the outerpin 6 of one of the rollers 4 andby meansof a bevel-wheel 12 operates a supply drum 1-3, rotatably mount ed in the base-plate '1 by means of a shaft 14.- and furnished at both sides with sprockets 15, which correspond to the common perforations of photographic or cinematographic I 4 in the shape of a spiral.

film-bands. The diameter of the supply drum 13 and the ratio between the bevelwheels is such, that the drum 13 and the roll-' force the pressure roller 17 against the drum 13.

A collar 21, through which a pin 22 passes, is arranged above the bevel-wheel 8 and is carried by supports of the base-plate 1. The pin 22 is fixed to the collar and a sleeve 23 is pushed over the former. A number of radially disposed spokes 24 pass away from this sleeve and are arranged slightly lower than the uppermost surfaces of the rollers 4. The spokes are provided with notches 25, which correspond to the grooves 16 in the rollers 4. A sleeve 26 is pushed over the sleeve 23 and is also provided with radiallyrdisposed spoke 27, furnished with notches 28 at the bottom side thereof. A plate-spring 29 is fixed to the outer surface of the sleeve 26, and a pin 30 is secured to the free end of the said spring and adapted to auton'iatically pass through

holes

30 and 30" in the-sleeves, in case they are brought into alignment with each other, in order to connect the sleeves with one another.

The device operates in the following manner:

A film-band 31 is passed over the supply drum 13, whereby the pins of the sprocket wheels 15 engage the perforations of the filmband. The first part of the film-band is placed. right around in to the outermost groove 16 of each roller 4, and the beginning of the Jtil1nband is provided with a clamp (Fig. 4), a nose of the latter engaging on and being guided by the border of the already laid winding. Now on rotating the driving disc 10, also all rollers 4 and the drum 13 are rotated with the same rotary speed. The drum 13 feeds fresh parts of the image-band to be wound up to the rollers 4, which now take over the feed of the film-band owing to the weight resting on the rollers, so that the beginning 32 of the film-band is fed forward by the nose 34 along the border 35 parallel to the preceding winding, until it reaches to innermost groove 16. The dimensions of the device are such, that now a filmband of ordinary length rests on the rollers In case the

sleeves

23 and 26 are connected with each other by means of the resilient pin 30, the borders of the film-band are retained between the

notches

25 and 28 of the

spokes

24 and 27 respectively, and the film-band. can be lifted off the rollers 4 without varying its windings.

In the construction shown in Figs. 5, 6 and 7, the operation of the individual bevel-wheel 7 is effected by intermediate wheels 36, rotatably mounted on pins 37, the latter being secured in supports of the base-plate. The entire device is driven by a driving disc 38, operating bevel-wheels 39, which are disposed outside the frame 2. The pin 5 of one of the rollers 4 is extended toward the centre of the device and carries a winding-oil drum 40, provided with sprockets 41 in a manner similar to the supply drum 13. The arrange ment for taking-oil the film-band preferably consists of a disc 42, resting on the frame 2 and furnished with slots 43, through which the upper parts of the rollers 4 pass. The outer edge 44, as well as also the inner edge 45 of the disc 42 are bent upward, in order to prevent the win ding-off of the wound-up filmband. In this construction the rollers 4 are provided with smooth surfaces,-and the space between the spiral windings is attained by turning up the beginning of the film-band.

In this construction the image-band is wound-up in the shape of a spiral by the supply drum in the manner already set forth. The beginning of the ii'nage-band is, however, passed over the winding-off drum 40 and from there is conducted for instance through a projecting apparatus, so that a fresh projection has not to be preceded by a re-winding in order to again introduce the beginning of the film-band into the projecting apparatus. If desired the beginning and end of the film-band may be united, so as to produce an endless band, which can be shown without interruption.

The film-band may be wound also in the reversed direction, e. g. from the inside to the outside.

I claim 1. A device for winding photographic or cinematographic tiln'i-bands, comprising in combination a. number of horizontally and radially disposed rotary rollers of like diameter for sup 'iorting' the film-band to be wound up, means for rotating all rollers in the same direction and at a uniform speed and forming a spirally wound-film-band, a sleeve with radially extending arms arranged in the centre of the radially disposed rollers, and a second sleeve with radially extending arms slidably mounted on the sleeve first mentioned, the arms of the one sleeve extending between the said rollers and the arms of the other sleeve extending above the said rollers.

2. A device for winding photographic or cinematographic film-bands, comprising in combination a number of horizontallyand radially disposed rotary rollers of like diameter for supporting the film-band to be woundup, a drum of the same diameter as the said rollers and provided with sprockets for engaging the perforations of the film-band and feeding the latter onto the said rollers, means for rotating all rollers in the same direction and at a uniform speed and forming a spirally wound film-band and for rotating the said drum at the same speed as the rollers, a sleeve with radially extending arms arranged in the centre of the radially disposed rollers, and a second sleeve with radially extending arms 7 slidably mounted on the sleeve first mentioned, the arms of the one sleeve extending between the said rollers and the arms of the other sleeve extending above the said rollers.

3. A device for winding photographic or cinematographic film-bands, comprising in combination a number of horizontally and radially disposed rotary rollers of like diameter for supporting the film-band to be woundup, means for rotating all rollers in the same direction and at a uniform speed and forming a spirally wound film-band, grooves in each roller in which the individual windings of the spirally wound film-band rest and prevent the contact between the individual windings, a sleeve with radially extending arms arranged in the centre of the radially disposed rollers, and a second sleeve with radially extending arms slidably mounted on the sleeve first mentioned, the arms of the one sleeve extending between the said rollers and the arms of the other sleeve extending above the said rollers.

4. A device for winding photographic or cinematographic film-bands, comprising in combination a number of horizontally and radially disposed rotary rollers of like diam eter for supporting the film-band to be wound up, means for rotating all rollers in the same direction and at a uniform speed and forming a spirally wound film-band, a sleeve with radially extending arms arranged in the centre of the radially disposed rollers, a

second sleeve with radially extending arms slidably mounted on the sleeve first mentioned, the arms of the one sleeve extending between the said rollers and the arms of the other sleeve extending above the said rollers, and means provided on the said sleeves for locking the latter with respect to each 50 other.

5. A device for winding'photographic or cinematographic filnrbands, comprising in. combination a number of horizontally and radially disposed rotary rollers of like diam- 55 eter for supporting the film-band to be woundup, means for rotating all rollers in the same direction and at a uniform speed and forming a spirally wound film-band, a sleeve with radially extending arms arranged in the centre of the radially disposed rollers, a second sleeve with radially extending arms slidably mounted on the sleeve first mentioned, the arms of the one sleeve extending between the said rollers and the arms of the other sleeve extending above the said rollers, holes in the one sleeve, and a spring-bolt on the other sleeve adapted to engage the said holes and lock the two sleeves with respect to each other. 7

6. A device for winding photographic or cinematographic film-bands, comprising in combination a number of horizontally and radially disposed rotary rollers of like diameterfor supporting the film-band to be wound- 5 up, means for rotating all rollers in the same direction and at a uniform speed and forming a spirally wound filmdoand, grooves in each roller in which the individual windings of the spirally wound film-band rest and prevent the contact between the individual windings, a sleeve with radially extending arms arranged in the centre of the radially disposed rollers, a second sleeve with radially extending arms slidably mounted on the sleeve first mentioned, the arms of the one sleeve extending between the said rollers and the arms of the other sleeve ext-ending above the said rollers, and notches on the said arms corresponding to the grooves in the rollers for engaging the border of the spirally wound film-band and securing its windings in position.

In testimony whereof I affix my signature.

Josir HALLA.