A film cartridge for use in a camera of the type having an adjustable drive mechanism which may be actuated to vary the driving force applied to a rotatable film driving core in the cartridge. The cartridge includes a movable pressure plate operable to actuate the camera drive mechanism and apparatus for applying to such plate an actuating force directed generally parallel to the axis of rotation of the film driving core.

A retroreflective film comprising a lamination of a first base layer having vacuum metallized hemispherical depressions on one surface thereof and a second layer having substantially hemispherical projections from the surface thereof formed from an optically transparent film wherein the first and second layers are arranged so that the hemispherical depressions of the base layer and the substantially hemispherical projections of the intermediate layer are concentrically arranged and the radius of...

A retroreflective film comprising a lamination of a first base layer having vacuum metallized hemispherical depressions on one surface thereof and a second layer having substantially hemispherical projections from the surface thereof formed from an optically transparent film wherein the first and second layers are arranged so that the hemispherical depressions of the base layer and the substantially hemispherical projections of the intermediate layer are concentrically arranged and the radius of...

A magazine for a strip of flexible material is disclosed having construction which consists principally of a first receptacle defining a supply chamber, a second receptable defining a take-up chamber and an intermediate frame member connecting integrally with both of said receptacles. The magazine disclosed features an integral energy storage means for driving a spool rotatably mounted within the take-up chamber. Another feature of the invention is resilient means within the supply chamber for r...

A film spool comprising a barrel and transverse end flanges having inwardly facing or opposed surfaces that define the film-storage area. A circumferentially extending ridge, radially spaced from the barrel, is formed on the inwardly facing surface of each flange and projects toward the ridge on the inwardly facing surface of the other flange. The distance between the ridges on the two flanges is slightly less than the width of film to be wound on the spool so that the ridges hold the film in a ...

A heat-curable self-supporting organic polymeric bonding film consisting essentially of a single reactive layer that includes a composition comprising (1) 100 parts by weight of heat-curable epoxy resin; (2) a high-molecular-weight flexibilizing polymer that is reactive with epoxy resin and provides 5 to 40 parts by weight of elastomeric segments in the composition for each 100 parts by weight of epoxy-resin segments; and (3) a room-temperature-latent curing agent. An exemplary composition inclu...

A film cartridge loaded in the conventional manner with a roll of motion picture film having a magnetic stripe on one surface of the film will clockspring in a radial direction and undergo displacement of some convolutions of the film in a direction parallel to the axis of the film roll if subjected to shaking or impacts during handling of the cartridge prior to use in a camera. When this occurs, friction between the displaced convolution and the adjacent convolutions of the film effectively pre...

A film cartridge loaded with a roll of motion picture film having a magnetic stripe on one surface of the film is subject to shaking or impacts during handling of the cartridge which results in displacement of some convolutions of the film in a direction parallel to the axis of the film roll, especially when the film has first clocksprung in a radial direction. When this occurs, friction between the displaced convolution and the adjacent convolutions of the film effectively prevents return of th...

A film cassette is provided with a front protective board which may be slid into or out of the cassette through the monosheet exit. When inserted in the cassette, the protective board prevents entry of light through a front exposure opening formed in the cassette. When the protective board is removed from the cassette, exposed monosheets may be removed without hindrance from the cassette. If it is required to remove the cassette before exposure of all the monosheets provided therein, the protect...

A film splicer in which the two ends of the film to be spliced are held in clips and pivoted between a cutting block and a taping block, the splicer including a roll of tape mounted between the two blocks designed to be pulled out into contact with the film so as to join the two ends together and further including a combination hole punch and knife pivotable above the film so as to cut off the excess tape and form new sprocket holes in the film.