US1596966A

US1596966A - Film splicer

Info

Publication number: US1596966A
Application number: US587991A
Authority: US
Inventors: Griswold Frederick Clark
Original assignee: OLIVE A GRISWOLD
Current assignee: OLIVE A GRISWOLD
Priority date: 1922-09-13
Filing date: 1922-09-13
Publication date: 1926-08-24
Anticipated expiration: 1943-08-24

Description

Aug. 24, 1926. l v 1,596,966

F. C. GRlswoLD FILM sPLIcER Filed sept) 15, 1922 2 sheets-sheet 2 i WYE/WOR ATTvR/vw Pamesa Aug. 2.4,A 1926.

UNITED V'fsTA'lTEs [1,596,966 PATENT oEFlcE.

FREDERICK CLARK GmswoL'n, or P01311` JEFrEnsoN, nnw'yonx, Assranon To OLIVE A. Gnswonn, or roar JEFFERSON, NEW Yonx.

'FILM' srmorinh Appiicationmea september 13, 1922. semi No. 587,991.

Theobject of my invention is to provide .certain improvements in iilmsplicing ma' as to leave overlapping matched portions to be united.

fA practical embodiment of my invention is represented inthe accompanying drawinlgs, in which s Fig. 1 represents a top lan view ofthe r machine with the parts in t e positions they assume when the overlapping end s o f the film sections are being united.

Fig. 2 repreesnts'a front View of the same.

lFig. 3 represents-a section taken in the" plane of the line III-III of Fig. 1.

Fig. 4 represents a. section taken in the plane of the line IV-IV of Fig. 1. Eig. 5 represents a section taken inthe two planes of the line V-V of`Fig.,2, with the r1ghthand film clamp in its raised position; a .iilm scraper belng sho-wn in full lines and'dotted lines in operative positions. Fi 6 represents a ilm scraper, which may be used in connection with my machine, inside elevation.

Fig. 7 represents. a plan view of the trimmed ends of ad-jacent film sections, sepauprise from the base of the .machine at the rated, and

Fig. 8 represents a similar view with the trimmed ends of the sections united.

The base of. vthe machine is denoted by 1, andit comprises a-top portion and a peripheral .depending lia-nge.

Lugs

2, 3, 4 and' back thereof,which lugs form supports for a-iixed shaft 6 ,on which the right and left film clamps, to be hereinafter described, are loosely mounted to swing vertically into and vout of position.

A double shear block- 7 is seated at its 3 and 4,'and at rear end between .the lugs 8 d 9. h h

ugs an ,w 1c

uprise from the ront'of the base 1. Set

screws 10 and 11 carried vby the lugs 3 and 8 v""resjlectively, serve to removably "clamp the double' shear blockin position. This shear I block has a iiat horizontal v'top' face on which lthe trimmedoverlapping' ends of the film sections are united. 1

The upper and lower jaws of ther left -lm clamp 'are cha hand film clampare denoted by 12 and 13, which jaws are independently loosely mounted on the lixedshaft 6 a coil spring 14 .being located between the u 2 and the film clamp for yieldingly presslng the film clamp laterally to the limit of its movement toward the-double shear block, to ensure the proper coaction of the cutting blade with the shear block. l

rEhe upperand lower jaws of the left hand ilmclamp are provided with

suitable handles

15 and 16, the'upper handle 15 being providedwith a spring catch 17 which serves the double function of locking the two jaws together, and of'lockin the clamp Ato its adjustable stop 18 when t e clsmp is in its lowered positlon.

The lower jaw 13 of the left hand film lclamp is provlded with a shear blade 19 arranged, to coact with the adjacent side of the Y double shear block 7 for trimming oil' the rough projecting end of the lm section carried by immediately described.

The upper and lower jaws'ofthe right hand film clamp are denoted byf20, 21,.

which jaws are independently loosely mounted on lthe fixed shaft 6, a 'coil spring 22 being located between the lug `5 and the lm clamp foryieldingly pressing the film clamp laterally to the limit of its movement the right hand film clampto be,

toward the double shear block, to ensure the The lower jaw 21 of thisright handiilm clamp is provided with a shear blade 27 arranged to coact with its adjacent side-of the double vshear block 7 for trimming. oli therough' projecting end of the ilmsection carried bythe left`handfilm clamp.

' The lower jaws of the right and left hand'. i

eled 'along their up- Ipier faces to provideseats for receiving the m section adjacent. to vvthe ends to be for eng ng 'the' perforations aong the sides .o

united, registering pins 28 being" rovided e film sections, the upper jaws of the right and left lm clamps bein'g provided with holes 29 for receiving `the said registering pins when the jaws are closed.

The upper jaw of the left hand film clamp is provided with a longitudinally adjustable yielding combined guard and guide 30 having a downwardly turned lip 31 (preferably sharpened) arranged in position to press against the upper face ofthe projecting end of' the film section carried by the left hand clamp. A combined guard and guide 32 is secured tothe lower jaw 13 of the left hand film clamp andit is provided with an u iwardly turned lip 33 (preferably sharpenedl) arranged to engage the underface of the projecting end of the film Asection carried byl the left hand clamp. These combined guards and guides serve two purposes; first, to limit the distance back so that the elnulsion can be scraped off from the upper face of the pro'ecting end of the e film section carried by t e left hand film clamp, and second, to prevent the spreading of the cement along the film section between the upper and lower jaws of the film clamp.

The lowerjaw- 21 of the right hand film clamp is provided with a combined'guard and guide 34 havin an upwardly turned li 35 (preferably s arpened) the edge of w ich lip engages the underface of the projecting end of the film section carried by the right hand clamp. This combi-ned guard and guide serves to prevent the spreading of the cement between the jaws of the right .within the base anda suitable button 40 may be provided at the front of the 'base for controllingthe lighting of the said lamp 38. This lightingmeans will materially assist in the proper matching up of the lm sections, and also in manipulating the same. A bot-tom plate 41 for enclosing the base may 'be 'removably secured in position by a screw 42 having an exterior handle 43, the

A shank of which screw is threaded into a lug 44 depending from the top of the base.

Suitable lugs

45, 46 depending from the top of the base serve to properly position the storage battery 39'.

A cement reservoir 47 may be removably positioned within the base 1, with the mouth of the reservoir projectino' upwardly through a hole 48 in the top olf the base.

ing an extended surface for engagement with the side of the shear block 7. The shank of the holder has a recess 59, the end wall of which recess is provided with a double bevel forming an edge adapted to rest upon and slide along the horizontal portion 49 of the guide bar. To remove the emulsion from the projecting end of the film section carried by the left hand film clamp, the scraper has to be tilted as shown in full lines and dotted lines in Fig. 5 to bring the scraping edge of the blade 54 into engagement with the film section, thus preventing the scraper blade from cutting the film during the removal of the emulsion.-

A stop bar 60 is carried by a plate 61 fast between the lugs 3 and 4 of the base in position to limit the vertical swinging movements of the film clamps.

It' so desired, adjustable stops 62 and 63 may be providedin the upper jaws 12 and '420 of the film clamps in position to limit the downward movements of the combined guard and guide 30 andof the presser blade 36. Adjustable tensioniscrews 64 and 65 are also provided in the upper jaws 12'and 2O in position to adjust thetension of the com` bined guard and guide 30 and the pressei1 blade 36. A

In splicing the film sections together, the cycle of operations may be as follows:

The left' hand film clamp may be raised and the upper jaw of the right hand fllm clamp may be raised .to permit the placing of the Vright hand film section in position with the end of the film section to be trimmed projecting the required distance Inj,

beyond the shear block. The upper jaw of the right hand section is then closed, the presser blade carried by the upper jaw serving to hold the end of the film Section snugly on top of the shear block. The left hand film clamp is then lowered to cause its shear blade 19 to trim said projecting end-of the film section.

The right hand film clamp isthen raised and the upper .jaw of the left hand film clamp also raised sufficiently to permit the placing of the left hand film section in position with the end of the film section to be trimmed projecting the required distance beyond the shear block. The upper jaw of theleft hand section is then closed, the downwardly turned lip 31 'of the combined guard and guide 30 coacting with the with its film section, thus leaving the eX- posed end of the `other film section in position where the emulsion may be removed therefrom by the film scraper. The cement. .may then be applied to this exposed end of the film section, th'e downwardly turned lip of the combined guard and guide 30 serving to prevent the cement from spreading too far back from the end of the film section.

' The right hand film clamp may then be again lowered, thus bringing the exposed end of its film section'onto the exposed treated end of the other film section, this movement bringingthe knife edge of the downwardly turned lip 37 of the presser blade 36 into engagement with the top overlapping film end to press the overlapping film ends together along a median line.

This knife edge engagement of the presser blade will prevent the cement from being squeezed out of the joint between the overlapping ends, as ,was a common fault where a presser bar of considerable width was used. The upwardly turned lip 35 of the combined guard and guide 34 serves to prevent the escape of the cement into the right hand film clamp between the jaws. After 'the film ends have been firmly united,the

upper jaws of the right and left film clamps are opened to permit the removal of the united film sections.

It is evident that various changes may be resorted to in the form, construction and arrangement of the several parts without departing from'the spirit and scope of my invention; hence, I do not intend to be limited to the specific details herein shown and described, lexcept as they may be included in the claims.

'IVhat I claim'is:

1. Inv a film splicer, a double shear block,

a pair of swinging film clamps having cutting [with the shear block to so trim the film blades arranged to alternately coact sections as to leave overlapping ends, each film clamp comprising upper and lower jaws, a presser blade carried by the upper jaw of one film clamp in position to yieldingly pressthe ,overlapping film ends together along a median line on the shear block, a combined guard and guide carried by the lower jaw of said last named film clamp, and coacting combined guards and guides carried by the upper and lower jaws of the other film clamp.

2. In a film splicer, a shear block, a vertically swinging film clamp for moving a projecting end of the film section onto and 'off from the shear block, the film clamp comprising upper and lower jaws, and a longitudinally adjustable presser blade cartically swinging film clamp for moving a projecting end of the film section onto and off from the shear block, a presser blade carried by the upper jaw of the film clamp, means for adjusting the tension of the blade, and adjustable stops for limiting the downward movement of the blade.

5. In a film splicer, a shear block, a ver-` tically swinging film clamp for moving a projecting end of t-he film section onto and ofi' from the shear block, the film' clamp comprising upper and lower jaws, and4 a longitudinally adjustable combined `guard and guide carriedA by the upper jaw of the film clamp. Y

6. In a film splicer, a shear block, avertically swinging film clamp for moving a projecting end of the film section' onto and ofi' from the block, the film clamp comprising upper and lower jaws, a combined guard and .guide carried by the upper jaw, and means for adjusting the tension of the combined guard and guide.

tically swinging film clamp for moving a" projecting end of the film section onto and off from shear block, the film clamp comprising upper and lower jaws, a combined guard and guide carried by the upper v jaw of the film clamp, means for adjusting vthe tension of the combined guard and guide,

and adjustable stops for limiting the downward movement of the said combined guard and guide.

In testimony, that I claim the foregoing as my invention, I have signed myfname this 11th day of September, 1922.

FREDERICK CLARK GRISWOLD.