US1550038A - Motion-picture-film-splicing machine - Google Patents

Description

Aug. 1s, 1925, 1,550,038

H. ROHRDANZ ET AL MOTION PICTURE FILM SPLICING MACHINE Filed Oct. 5. 1921 :gigi-15g sl @l f o 0/ Patented Aug. 18, 19,25.

UNITEDv STATES PATENT OFFICE.

HAROLD ROHRDANZ AND ARCHIBALD G. MATTESON, OF LOS ANGELES, CALIFORNIA; SAID MATTESON ASSIGNOR TO CHARLES J'. KOKEN, OF LOS ANGELES, CALIFORNIA.

MOTION-PICTURE-FILM-SBLICING MACHINE.

Application filedl October 5, 1921'. Serial No. 505,633.

' residing at 1034 lVest Thirty-fourth Street,

Los Angeles, in the county of Los Angeles, State of California, and ARCHIBALD G. llLxT'rEsoN, residing at 5253 South Figueroa Street, Los Angeles, inthe county of Los Angeles and State of California, bothvcitizen-s of the United States, have invented aV new and useful Motion-Picture-Film-Splicing Machine, of which the following .is a specification.

Our invention relates to improvements in motion picture film splicing machines in which the broken Elm when' located in the machine, is perfectly aligned, both broken ends are trimmed or sheared simultaneously by a double cutting shear with one movement. leaving exposed the necessary amount of film which is cleaned of the sensitive photographic material by the use of a special scraping tool, after which the adhesive is applied and the same movement which clamps the joint together also measures and retains perfect pitch of the perforations along t-he edge of the film'.

We attain 'these objects by the mechanism illustrated in the accompanying drawing, in which- Figure 1 is a plan View of the entire machine; Fig. 2 is a view in perspective of the scraping tool used to clean the film preparatory to applying the adhesive by which thc splice in the film is secured.

Similar letters apply to similar throughout.

The base plate A, to which four standards or blocks B, are secured one at each of the four corners, and which standards or blocks carry two rods or slides C, and C1, constitute the frame of the machine.

On rod C is attached plate a, which is held permanently in position by clamp screw to rod C1. v In plate a, is located four aligning pins b, two of which roject through the rack perforations of film F, and two located at sides of film.

The film clamping plate D, hinged on rod C, is clamped down on film F, and held by spring latch l.

The shear-plate S, hinged to rod C1, trims both broken ends of film simultaneously, shown by dotted lines, shearing down by shear blocks e, and e1, which are secured to base plate A.

parts The@ spring clamp f, secured to shear plate S, automatically holds exposed end of' film while being sheared or trimmed. Shear knife plate S1, made of tool steel, is secured to plate S, which provides for renewal of shear knife.

The plate g, hinged to rod C, contains four aligning pins b,two projecting through the rack perforations of filmand two located at edge of film. Clamping plate h, hinged to rod C is clamped down and held over film by 'spring latch 1-3, in the same manner film clamping plate D holds the opposite 'broken end of film while shear S is swung over and down, trimming both ragged ends of film simultaneously. After shearing, shear S is returned. to position shown in drawing.

A serrated tool i, Fig. 2 is used to clean the photographic substance from the film on the exposed end of film over shear block e1, after which adhesive is applied to secure Splice in film.

Referring to plate g, upon which has been located the broken film and the clamping plate 7L clamped down over film by latch 13 the next operation releases the latch and both plates g and l1, are lifted, together, carrying film to opposite exposed end of film over shear block el, by sliding along on rod C to position against shear block e1, when the two ends of` film are clamped down together sufficient time to dry cement, being held in this position by I latch 1-2, after which clamping plates D and L are lifted and the completed splice is accurately finished.-

lVe are aware that prior to our invention film splicing machines have been made. We therefore do not claim such a combination broadly; but

We claim- Y 1. A film trimming and splicing device comprising a pair of spaced stationary shear blocks, a pivoted shear adapted to cooperate with both of said shear blocks to effect a shearing action,A means for holding a length of film with an end portion to be trimmed extending over one of said shear blocks, a movable film holding means to hold a second length of film with an end portion to be trimmed extcndin over the other shear block, and a ide ro on which said last named film-holdlng means is pivot ally and slidably mounted, said movable film-holding means being adapted to be advanced on ,sa-id rod and to be swung vertieally thereon whereby the end portion of the film carried thereon may be brought downward upon the end portion of the film in the other film holder.

2. A film trimming and splicing device comprising a pair Aof spaced stationary shear blocks, a pivoted shear adapted to cooperate with both of said shear blocks.

(to ei'ect a shearing action, means for holding a length of film with an end portion to be trimmed extending over one of said shear blocks, a movable film-holding means ladaptedvto hold a second length of film with an end portion tobe trimmed extending over the other shear block, a, guide rod on which said la'st- -namedfilm-holding means is pivotally and slidably mounted said movable film-holding means adapted to be advanced on said rod and rockable vertically whereby the end portion of the film carried thereon may be brought downward upon the end portion of the film in the other film holder, said movable film holder embodying a table and a leaf adapted to swing independent of each other on said rod and to be moved collectively there on.

ARCHIBALD G. MATTESON. HAROLD ROHRDANZ.

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