US1641420A

US1641420A - Cut-film holder

Info

Publication number: US1641420A
Application number: US95267A
Authority: US
Inventors: William F Folmer
Original assignee: Eastman Kodak Co
Current assignee: Eastman Kodak Co
Priority date: 1926-03-17
Filing date: 1926-03-17
Publication date: 1927-09-06
Anticipated expiration: 1944-09-06

Description

Sept. 6, 1927.

- 1,641,420 W. F. FOLMER CUT FILM HOLDER Filed March 1'7, 1926 2 Sheets-Shea?l l E 5 .9

""mm l5 I t \'vllllllllll{llllllllzlllll. TORNEYS.

l 641 420 Sept 61927' w. F. FoLMER CUT FILM HOLDER y Filed March 17, 1926 2 Sheets-Sheet 2 INVENTOR, WZz'aJzY/Fjblmel;

.//f vf ATTORNEYS.-

manca Ism. 6,1921.

UNITED ASTATES PATENT. OFFICE.

WILLIAM E. romana, or EooHEs'rEE, NEW YORK, AssrGNoa 'roEv'As'rmAN KODAK COMPANY, OE HocHEs'rEE., NEW YORK, A oOEronArrON o ENEw YORK.

cU'r-EILM HOLDER.

Application filed March 17, 1 926. Serial N0. 95,267.

1`hisinvenion relates to photography, and

upon suitable supports may be exposedin a camera. One object of my invention is to provide a holder in which the photographic material holders are held accurately 1n position. .Another object is to provide a suitable light locking means between the two holders which are placed back to back in the carrying frame. Another object is to. provide holders which are supported on al1 four sides, and other objects will appear from the following specification thereof.

This application is a continuation in part of my copending application for cut film holders, Serial No. 654,489, iiled July 28, 1923.

In the drawings, wherein like reference characters denote like parts throughout:

Fig. 1 is a plan view of a holder constructed in accordance with and embodying one form of my invention;

.Fig. 2 is. an enlarged Fig. 3 is an enlarged section on line 3-3 of Fig. 1;

Fig. 4 is an enlarged detail section on line 4--4 of Fig. 1;

Fig. 5 is a perspective view of a preferred type of sheath removed from the holder; an

Fig. 6 is an enlarged detail section of another embodiment of myinventiomthis section being taken across one of the side rails of a holder.

I have selected for illustrating a preferred embodiment of my holder, a double holder since this is the type generally used by'phoktog'raphers in this country. Certain features of the invention are equally useful .when applied to a single holder.

. In photographic cut lm holders, particularly in the larger sizes, such as the4 8 X 10,

10 X 12, 7 x 17, 12- x 20, etc., it has been dicult to construct a holder which would `be perfectly light ti ht and remain so. It has also been dilicu t to make a large size holder in which a sheet of cut film could be made to lie accurately -in a plane surface.

Comin now to the drawin as shown in Fig. 1, e holder designate broadly zas 1,

the. novel featuresl being pointed out in the claims at the endv detail section on A made of some material w ich w' consists of a frame having a cross bar 2 at the top, light guard plates 3 extending across the top and spaced from the cross bar 2, side bars 4; and a bottom 5 to which is hinged by fabric 6 the doors 5. This door construction is well known, being shown in Il. S. Patent No. 603,972, Schaub, May 10, 1898. Dark slides 7 are provided with the usual handles 8 which maybe engaged by latches 9 which are carried by the top bar 2.

As will be noted from Fig. 2, the cross bar 2 is provided with depressions 12 into Whichthe spring light guard-plates22 are adapted to lie. When thedark slide 7 is 1n place, the spring plate presses against the dark slide. When the slide removed, as shown in the left hand side of this figure, the light guard plate, enters the groove 12 so that hght is prevented from entering tiugzh the slot 31which receives the dark s 1 e v The Sheets of un fum F are held in vposition in this holder bI means of sheaths 15.

These sheaths may c nsist of a metal plate .having longitudinal overhanging flanges 38 and an end overhanging flange 39, and an unflanged end 40.. The sheath of Fig. 5 differs from that used in the embodiment shown in Figs. 1 to 4 inclusive in that the .flanges 38 are formed above a base plate bent at 138 so as toraise the edges of the ,sheet film.v This structure is particularly useful in holding large sheets of cut film flat and it is disclosed in U. S. Patent No. 1,139,079, Sievers, May 11, 1915.

In the embodiment shown in the rst four figures of the drawings, the film sheaths 15 are supported in the holder in the following manner: There are grooves 28 cut into cross bar 2 adapted to receive the flanges 39 of the two sheaths. These grooves are spaced by a tongue 37. The side rails 4 of the holder are provided with a relatively wide groove 49 which receives the side flan es 38'which, in this embodiment, are spaced y a. central plate 17. This late is referabl not rear? ily warp', such as pressboard. As shown in Fig. 4, vthe bottom rail 5 of the holder is' provided with a tongue 45 which is of the same width as plate 17. The unan .d

.ends 40 of the sheaths are spaced by t is swingin open the doors and sliding the tion that the film sheaths 15 may be manufaetured separately and after having been made perfectly flat may be built into the frame, above described, so as to be held rigidly in position in the grooves. As will be noted from Fig. 2, the grooves 28 in the cross bar 2 are of somewhat greater depth than necessary so that this permits the sheaths to move if the frame should warp.

I also prefer to have at least oneof the grooves 49 in the side rails 4 slightly deeper than necessary so that the frame may expand or contact to a limited degree without causing the metal sheaths to be bent or warped out of shape. An important feature in this construction is that the sheaths, by entering the groove in the side and top members of the frame, form a light-tight joint therewith so that the exposure of one film will not admit light around the edges of the holders to the film on the other side. The bottoms of the sheaths are also perfectly light-tight, since the tongue extends up between these members.

In the form of my embodiment shown in Fig. 6, I have made a holder which is somewhat thinner than that shown in the previous figures, since the plate 17 lying between 'the film sheaths is omitted. In this embodiment, I provide grooves 149 in the side rails 4 separated by V-shaped flanges 150, so that the side fianges 38 may seat themselves against the walls of the groove. In this instance, the li ht-tight joint is formed by the Walls of the ange 38 lying against the walls of the groove. Where the plate 17 is omitted, I prefer to form up the ribs 41 and '42 somewhat, deeper than is` otherwise the case, so that these ribs may contact and form spacing members to hold the plates 43 .spaced from each other. These ribs per form two functions. First, in the manufacture of the sheaths the ribs are useful in assisting in keeping the bottom 43.0f the sheath flat so as to lie in a plane. Second,

the ribs form s aced members for holding the sheaths slig tly apart, as shown in the mbodiment of my invention illustrated in ith either of the above described embodiments of my invention, the holders are comparatively easy to make, since the side and top members of the frame may be assembled and a air of sheaths 15 with lor without plate 1 may be thrust into the grooves of the side rails and into the groove of the top, after which the-bottom 5' may f be placed on the frame to hold the parts in their assembled position. This construction makes a substantial holder in which tho parts are accurate] retained in position. The bottom of the s eaths 43 against which the films lie flat are made of a sheet metal preferably reinforcedwith ribs. Further more, the sheaths reinforce each other since the lie back to back, and in the preferred em odiment of In invention the plate 17 also serves to stiiien the lilm holding part of the holder.

With both forms of my invention light is effectually prevented from leaking from one side through to the other as one film is being exposed. In the first described

embodiment flanges

37 and 45 form light locking tongues between the sheaths and in the last described embodiment the V-shaped flanges 150 form the tongues past which light may not penetrate.

Having thus described my invention, what 2. In a photographic film holder, the combination with a frame having grooved top and side members, a bottom member having a tongue extendine' therefrom, of'means for holding two films mcludin fianged sheaths, the top and side edges of t e sheaths engaging the grooved frame members, and the sheaths lying upon and being spaced apart by the tongue of the bottom member.

3. In a photographic film holder the combination with a frame havin top, bottom and side members, of means or supporting film sheets comprising sheaths, and interengaging members on the sheaths and frame members forming a light tight connection between these parts.

4. In a photographic film holder, the comi binationy with a frame having top, bottom and side members, at least two of these members having slots therein, means to hold film comprising a sheath adapted to engage the four frame members and being adapted to lie partially in the slotted members, the depth of the slots being greater than necessary to receive the sheath whereby movement due to expansion or contraction of the frame may be permitted between the sheath in its supporting frame.

5. In a photographic film holder, the combination with a frame, of a pair of film sunporting sheaths mounted back to back in the rame, a tongue carried by the frame extending between the sheaths whereby a light tight joint is formed.

6. In a photographic film holder, the combination with a grooved frame, of a pair of film supporting sheaths mounted back to back in the frame, portions of the sheaths being adapted to lie in the grooves of. the frame,- and tongues extending from portions of' the frame between edges of the sheat-hs to form a light tight joint therebetween.

7 In a photographic film holder, the combination with a grooved frame, of film holders adapted to be located in the frame by the grooves, tongues on certain sides of the frame, said tongues being adapted to extend betweenadjacent edges of the film holders to prevent light from passing therebetween.

8. In a photographic film holder, the combination with a frame having top, bottom and side members, of means for holding two film sheaths, each of' the sheaths including a fiat plate, flanges on edges of the plate adapted to engage edges of a sheet of film to hold the film fiat against the flat plate, said sheath flanges 'also providing frame engaging members by which the two sheaths may be supported with the flat plates placed back to back, by portions of the frame.

9.y In a photographic film holder, the combination with a frame having top, bottom and side members, of means for holding films therein, including sheaths, each com-A prising a back formed of .a fiat sheet of material having fianges around a plurality of sides overhanging the fiat sheet, arranged back to back, a rstiffener between. the twosheath backs, the outside edges of the sheaths engaging the inside edges ofthe frame.

10. In a photographic film holder, the' combination with a frame,of a film sheath comprising a thin metal plate having a flat base with flanges extending around edges of the base adapted to hold a sheet of film by the edges with the film lying flat upon y sheath comprising'a fiat-base having flanges on edges thereofadapted to engage and hold Ya film sheet fiat thereon, means included Ibetween the sheath edges and the frame members for supporting the outside edges of the film sheath on the four sides of the frame, whereby the fiat base of the film sheath may be retained in a plane by the frame, said means permitting limited movement of the sheath relative to the frame.

Signed at Rochester, New York, this 12th day of March, 1926.

. WILLIAM F. FOLMER