Film punch

Abstract

Claims

Dec. 16, 1930; SPONABLE 1,785,215 FILM PUNCH Filed March 26. 1928 I I 6%5 A INVENTOR BY flTTo NEYS- Patented Dec. 16, 1930 UNITED STATES PATENT OFFICE EARL IRA SPONABLE, OF NEW YORK, N. Y., ASSIGNOR T FOX CASE CORPORATION, OF NEW YORK, N. Y., A CORPORATION OYNEW YORK FILM PUNCH Application filed March 26, 1928. Serial No. 264,705. This invention relates to a new andimproved device for puncturing negative films from which are to, be made positive films for use in moving picture apparatus and has particular reference to that part of the negative on which a sound record has been registered. V In order to prepare a film for projection it is necessary that the film be spliced at various points along its length. In the case of films which are used merely to project pictures these splices have no effect upon the visibility of the picture being projected. Where, however, a sound record has been made along one edge of a film so that the sounds accompanying the v icture being taken may be reproduced simultaneously with the reproduction of the picture, ithas been found that these splices are the cause 10 of a clicker interruption in the sound as they passthe sound reproducing apparatus. It has also been found that these clicks or interruptions may be avoided if the film or positive, at and adjacent the'place where it has been spliced, is rendered opaque, such opaque portion tapering or being gradually reduced in area on eachside of thesplice until the film again assumes the normal condition of the sound record. most convenient means by which these portions at and adjacent the splice may be rendered opaque consists in producing at the splice a properly shaped perforation through the negative film from which the positive film, which is the one generally'used in projecting, is to bevmade. This is due to the fact that any perforation in a negative film will result. in a similarly'shaped opaqued re- 41.) gion or area on the positive filmwhich is made fromit. p In making these/perforations in a negative film it is essentiallthatthe perforation be 'very exactlyplaced in the film and of a regular size, and the main objectof my invention is to produce a device by which these perforations maybe easily and quickly made and with the assurance that they will be'po sitionedinexactly the proper places in the Other objects and advantages relate to the size, shape and arrangement of parts all as will more fully appear from the following description taken in connection with the accompanying drawings in which Figure 1 is a perspective view of my device showing the jaws in the open position. Figure 2 is a section on line 22 of Fig ure 1, Figure 3 is a section on line 3-3 of Figure 2. Figure 4 is a section on line 4-4 of Figure '2 showing in dotted lines a portion of a negative; film in position inthe device. Figure" 5 is a top view partially broken away of a negative film showing a perforation in the sound record. 7 It will be understood that my device may be used in conjunction with diiferenttypes of apparatus which are capable of causing my punch and die to register one with the other but for the purpose of describing the functioning of a suitable device, I have shown an apparatus which consists of an upper hollow operating lever -1- fulcrumed to a lower operating lever 2 by means of a pivot pin 3-. A lower jaw 4i is pivotally mounted in the forward 7, v end of 1ever- 1 by means of a pivot pin 30 It has also been found that the best and. -5 and is provided at its rear end with a slot 6- slidably mounted on a rod -7 carried by the lower lever 2. A second jaw 8-- is in a similar manner pivoted to the forward end of lower lever 2 by means of pivot pin 9- and carries in its rear end a slot 10 slidably mounted on a rod 11- carried by upper lever 1-. l The shape of levers 1 and 2 and the position ofpivot pins 5 and 9 with relation to bars 7 and 11' is such that when the levers land 2 are moved with relation to each other the jaws .4 and 8 will be moved to and from each other but will at all times remain in parallel relation. I also provide a spring 12' between the handlesof levers l and 2. The spring 12 is of a shape and tension to yieldingly hold the rear ends of leversl and 2 apartso that normally the jaws 4: andfi Will beheld in the 7 open position, The forward end of upper jaw 8 is provided with a depending punch 13, in this case shown as of the shape of a truncated wedge with the truncated end facing rearwardly on the upper surface oi lower jaw l-. I provide a die -l;-lt securedinplaceby a screw -15- and pins l6- and '17 extending rearwardly from the front end of jaw l and positioned so that punch 13 will register with the hole l8- in thedie -1*lwhen the jaws l and 8 are moved toward each other. On the upper surface of die -ll- I provide a back plate -19- secured in position on jaw 't by means of screw -20. Back plate -19- extends transversely of jaw -a and outwardly "from both sides thereof for a purpose here inaiter to be described. A guide plate -'21- secured to'the upper surface of back plate 19 by intansot' screws 2222. Guide plate -21- extends forwardly over die -ll'in spaced relation thereto and is provided with a hole -23- to permit the passage therethrough of punch 13-. The .- forward end of guide plate 21- is provided with an indexing slot 2%- of substantially the same width as the usual splice on a film. v A vertical post 26 extends upwardly from lower jaw '4 and is secured therein by means oi pin -2T-. Post 26' extends upwardly through an aperture ,-28- in upper jaw 8 and is provided with an upper threaded end for the reception of nuts -29 and Upper jaw 8 carries a forwardly extending tongue -81 which carries an aperture 32 positioned to receive the upper end of post 26 when jaws -a and 8 are' moved toward each other. Aperture will not permit the passage through it of nuts -29"- and 30 so thnt when jaws 45 and 8 approach each other this movement will be limited by the engagement of nut 29 with the under surface oi tongue '3l'-. Nuts -'29 and 30 being vertically movable on post 26- the limit of movement of jaws i and 8 toward each other may be varied as desired. The distance between guide plate -21- and die -14- is sutiiciently great to permit the insertion therebetween of a film 33-, and the distance between hole '18 in die 1i and back plate 19 is such that when a film 33- is inserted between guide plate -2l and die '1 i' and is held against the front ace oi" back plate -'19, the hole -18 in die 1'' will be positioned so that punch -13' will exactly reg ister on that part of film -"3- which carries' the sound record shown as 34'on Figure 5. In operation a film is inserted between guide plate 2l and die with slot 24- in guide plate -21 registered directly above splice :'25'.,] in film -33 and with the edge of iilin 3" positioned against back plate 19. Jaws 4: and 8 are then moved towards each other which results in the downward movement of punch 13- against and through the portion 34:- of film 33- which carries the sound record, the cutaway portion of film passing outwardly through a slot 36 in jaw 4,-. As perhaps may best be seen in- Figure 5, the hole -35 thus made in film 3 3 will remove from film 33-- the entire portion of the sound record 34: which carries the splice -25 and preferably similar symmetrical portions of sound record -3 l on opposite side of splice 25 will also be removed, such latter portions gradually diminishing in area as they extend away fr'oin spl-ice -25. It will be understood mature purpose of my device is to remove a port-ion o t soiiiid record so that when a positive fili'n, not shown, is made from a negative film 33 a section of the sound record portion of the positivefi-lmwillbe opaque; Theportion of the sound record at the poi-ht oi the splice in the positive film will be entirely opaque and such opaqueness will continue from each side of thes'plice over a gradually decreasing area until sound record portion again assumes the normal condition of the sound record. In order to accomplishthis result I have here shown a punch l3 of the shape of a truncated wedge but it will be understood that punches of different shapes may be used, as for example, a punch of the shape of a segment of a circle, the only requirement being that the punch be so shaped that there will be removed from the sound record --34. all of the film in the splice -25 and that other portions of the sound record 34- on opposite sides of splice -25 will also be removed in gradually diminishing areas. It will also be understood that my punch- 13", die--'14, back plate 19 and guide plate "21'- may be used in conjunction with any device which is capable of causing punch to register in die '14. Although I have shown and described a particular arrangement and form of part as an 'ex'emplification of an embodiment of my invention I do not desire to restrict myself to the exact shape, form or ar'rangement oi parts as various changes may be made within thesc'ope of the appended claims. I amine; 1. In a punch for removing spliced-pertions of a sou-rid record element of a s'ound moving picture film, a punch, a" die, a back plate for positioning the punch transversely of the film, a guide plate, and means for positioning the punch longitudinally of the film, said means comprising 0 "pasta fingers extending outwardly from t e guide plate and spaced apart a distance correspeaaiag; to the width of the splice. 2. In a punch for removing spliced portions of a sound record element, of a sound moving picture film and tapered portions of the sound record on either side of the splice, a punch, a die, a back plate for positioning the punch transversely of the film, a guide plate spaced above the die, two parallel fingers extending outward from said guide: plate and spaced apart a distance corresponding to the width ofthesplice for accurately pipsitioning the punch longitudinally of the 3. In a punch forremoving spliced portions of a sound record element, of a sound I moving picturefilm and tapered portions of the sound record on either side of the splice, a punch, a die, a back plate for positioning the punch transversely of the film, a guide plate spaced above the die, two parallel fingers extending outward from said guide-plate and spaced symmetrically with respect to the transverse center line of the die and apart a distancecorresponding to the width of the splice for accurately positioning the punch longitudinally of the film. In witness'whereof I have hereunto set my hand this 19th day of March, 1928. EARL I. SPONABLE.

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