US1160037A - Photographic roll-film. - Google Patents

Description

J. BREWER.

PHOTOGRAPHIE HOLL FILM.

APPLlcATloN FILED fia.4.1915.

Joseph Brewer ATTORNEYS may JOSEPH BREWER, OF NEW YORK, N: Y.

PHO/TOGRAPHIC ROLL-FILM.

Specification of Letters Patent.

Patented Nov., 9, i915.

Application filed February 4. 1915'. Serial No. 6,038.

To all whom 'it may concern:

Be it known that l, JOSEPH BREWER, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and improved Photographic Boll-Film, of which the following is a full, clear, and exact description.

The invention relates to photography, and its object is to provide a new and improved photographic roll film arranged to permit the removal of Ione or a number of exposed sections of the film for separatelydeveloping such removed section or sections in case the removed sections require more or less time for development than the remaining roll film sections.

in order to accomplish the desired result, use is made of a roll film having single eX- posure film sections, the sections being separably connected with each other to allow removal of any one of the sections after the exposures have been made for independent developing ofthe removed section relative to the remaining film roll sections.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a face view of the roll film, its protective ribbon and its carrying spool; Fig. 2 is a like view of a single detached section of the roll film; Fig. 3 is a similar View of a pair of detached tened together for simultaneous development and independent of the remaining roll film sections; Fig. 4: is a longitudinal section of the roll'film on the line 4--4 of Fig. l; Fig. 5' is a similar view of the connected film sectionson the line 5-5 of Fig. 3; Fig. 6 is a face view of the outer end of the opaque vvprotective ribbon; Fig. 7 'is a perspective view of one ofthe fastening devices for fastening the film sections together and Fig. 8 is a face view of a preferred form of the roll film.

The roll film A is wound on a spool B together with the usual opaque protective ribbon C, andthe roll film A is formed of a series of sensitized exposure sections A which be in one continuous strip, as shown in Fig. 8, with the sensitized film sections separated b f' tion A from the adjacent onesafter the exroll film sections fas- 'f a transverse .row of perforations A? to permit of separating any one film ses;

posures have been made to allow of developing the removed section independently of the remaining film sections. The sensitized film sections may, however, be spaced apart and 6o connected with each other at adjacent ends by connecting strips D of paper or other flexible material, as shown in Figs. l, 2, 3, 4 and .Fach of the connecting strips D is provided witha transverse row of perfora- 6.5v tions D to allow of separating any one of thesaid lm'sections from the adjacent one,l the same as above described in reference to 4the roll film shown in Fig. 8.

rhe first film section A of each roll film 7o A is connected at its starting endby a strip E with the ribbon C (see Figs. l and 4) to permit of properly winding up the roll film on the winding-up roll in the camera. The outer terminal C" of the ribbon C extends beyond the attaching strip E to allow of connecting the ribbon with the winding up spool prior to unrolling the film A inthe camera for making the first exposure on the first film section.

Each connecting strip D is glued, pasted o-r cemented to the adjacent ends of successive sensitized film sections A, and the strip as Well as the adhesive material used 'must be water and acid-proof to withstand 85 the treatment while undergoing developing, washing and fixing. In practice, each row of perforations D is adjacent the end of the next following filmv section A and divides the strip into two parts D2','D3, so that 90 when theadjacent film sections are separated along the row of perforations D then the portion D2 of the-connecting strip D on the preceding section is of a sufficient .length to provide a convenient means for holding the film section without danger of touching the sensitized layer. Each connecting strip D is further provided on opposite sides of the row of perforations D with pairs of apertures F and F', of which the apertures F l0@ also pass through the corresponding film section to permit of fastening the remaining roll film sections together after one or two of the otherI sections have been removed. For thisV purpose use'is madeiof -fastening 105 devices G, suchA as shown in Fig. 7, adapted to engage the Apairs of apertures F,`F when noved in register 'with each other, that is, when superimposing the long end of a connecting strip .D of one section A with the 'short portion of a connct'ingstrip D of another film section A'. Ina like manner if two, three or more film sections Av'have been removed from the roll film then such detached sections can be readily connected with each other by the use of the clips G, as

shown in Fig. 3, to permit of developing the removed film sections simltaneously..l The 'fastening devices G must be of a chemical-1 proof metal or coated with an acid-resisting enamel, so that the developing liquid or fi-xing bath is not affected by the metal.

The film shown in Fig. 8 is provided with pairs of apertures F3 on opposite sides of the transverse row of perforations A2' to permitof fastening the remaining sections of a film together by the use of fastening devices after one or more such film sections have been removed for the purpose previously mentioned. l

Thepfilm sections, as shown in Fig. 8, have theirsensitized portions terminating a distance from the perforations A2 and the apertures F3 to provlde non-sensitized holding portions A3 at each end' of a film sec- It is understood that the film is used in the camera in `the usual manner and the film l sections are provided with the usualv identification marks, preferably consecutive numerals, to permit of identifying each section, and also to show such character in the usual observation window when winding up the film to display the unexposed film secl tion to the lens of the camera. Afterthe exposures have been made and the film has been removed from the camera and taken to the dark room any one film section A can be detached from the remaining one and developed separately. The remaining film sectlons are again connected with each other` by the use of the fastening devices Gr to allow of developing the samefas a unit. As previously stated, several film sections may be removed and fastened together for simultaneous developing, as indicated in Figs. 3

.and 5.v

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A roll film haviiicggsingle exposure sections separably connected with each-other by r transverse lrows of aperturformed inthe apertures-on opposite sides ofa rowof perforations, and fastening means adapted to engagethe-apertures ofthe separated endsv of the remaining roll film sections .to allow of developmgthe remaining film roll sections as a 'smgleum'tV A roll film, comprising a continuous strip having sensitized exposure sections and having transverse rows of perforations separating the sections from each other to permit of removing any. one or several of the sections for separate development from the remaining sections, and means for fastening together the separated ends of the film roll to allow of developing the remaining film roll sections as a single unit.

3. A 'roll film, comprising a continuous strip having sensitized exposure sections and having transverse rows of perforations separating the sections from. each other to permit of removing any one or several of the sections, the strip being provided' tiri-.opposite sides of each row of perforations with sets of apertures, and a fastening device adapted to engage the apertures of the separated ends of the film roll to allow of developing vthe remaining film roll sections as a single unit.

4. A roll film having single exposure sensitized film sections and non-sensitized holding portions adjacent the ends of each sensitized film section, the said non-sensitized holding portions havingrows of perforations separably connecting adjacent non-sensitized holding portions;

5. A roll film having single exposure sensitized film sections and non-sensitized holding portions adjacent the ends of each sensitized film section, the said non-sensitized holding portions having rows of perforations separablv connecting adjacent non-sensitized holding portions, the latter also having -pairs of apertures on opposite sides of each row of perforations.

In testimony whereof I have signed my name to this specification in the presence of two subscribingwitnesses.

JOSEPH BREWER."

Witnesses:

THEO. G. Hosrnn, PHILIP D. RoLLHAUs.

Copies of this patent'pmayfrhe obtained for lfive cents each, by addressing the Commissioner of Patents,

' Washington, D. C.

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