摘要:
A silver halide photographic material having improved anti-static properties comprising a support having thereon at least one silver halide emulsion layer and which contains in an outermost layer of the photographic material, in a layer contiguous to a subbing layer for a silver halide emulsion layer in the photographic material, and/or in a layer contiguous to the outermost layer provided on the opposite side of the support to that on which the silver halide emulsion layer is present in the photographic material a compound having a molecular weight of about 1,000 to about 50,000 and a recurring unit represented by the following general formula (I) ##STR1## R.sub.1 and R.sub.2, which may be the same or different, each represents an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group or an alkenyl group, or R.sub.1 and R.sub.2 can combine and form an alkylene chain; R.sub.3 represents an alkylene group or an aralkylene group having 10 or less carbon atoms; and X.sub.1.sup.- and X.sub.2.sup.- each represents an anion; and a method for preventing the generation of static charges in a photographic material.
摘要:
A photographic film cassette has a spool around which photographic film is wound in a roll. A cassette shell rotatably contains the spool in a roll chamber. A flexible leader separator is disposed between the roll chamber and a film passageway. The separator is in contact with the outside of the roll of the film, and abuts upon a film leading end during rotation of the spool in the unwinding direction, so as to be flexed during usage. A film leader is separated from the roll, and is advanced outward through the passageway. In a preferred embodiment, a pair of guide members are disposed within the passageway, and are in contact with the film in transporting the film out of/into the cassette shell. Though the cassette shell is molded from non-crystalline resin, these guide members are molded from crystalline resin so as to prevent the film from being damaged. A coaxial pair of rollers may be disposed inward from the passage mouth for supporting an emulsion surface of the film while the film is transported out of/into the roll chamber.
摘要:
A cassette shell of a photographic film cassette has a film passageway through which negative film is fed. A light-shielding member is disposed across the film passageway, and is elastic and rectangular. A side of the light-shielding member parallel to a spool in the cassette is attached to an inside surface of the film passageway. Structure is provided for receiving at least a free side of the light-shielding member opposite the side that is attached. In a preferred embodiment, a second light-shielding member similar to the first light-shielding member is disposed across the film passageway outside the first light-shielding member. In this manner, the inside of the film passage mouth is shielded from light. The film leader is advanced reliably to the outside of the cassette shell by rotating the spool, in the case of a cassette provided with structure for advancing the film leader by rotating the spool. In another preferred embodiment, a fine nap is provided on interior surfaces of the two light-shielding members. Light is trapped by the nap, while the nap prevents the negative film from being scratched by contact with the light-shielding members.
摘要:
Wrapping materials for photographic materials comprising laminated layers of a paper support and at least one thermoplastic resin layer superposed on at least one surface of said paper support; said thermoplastic resin layer comprises a blended resin of (a) a high-density polyethylene having a density of 0.950 g/cm.sup.3 or more and a melt index of 10-40 and (b) a low-density polyethylene having a density of 0.930 g/cm.sup.3 or less and a melt index of 1-40, the weight ratio of (b)/(a) being 70/30-5/95, preferably 70/30-20/80, more preferably 60/40-40/60.At least one layer of said wrapping materials optionally comprises light-shielding substance in an amount of 1.0-30 g/m.sup.2.
摘要翻译:包括用于照相材料的材料,其包括叠层在所述纸支架的至少一个表面上的纸支撑体和至少一个热塑性树脂层的层压层; 所述热塑性树脂层包含(a)密度为0.950g / cm 3或更高,熔体指数为10-40的高密度聚乙烯和(b)密度为0.930g的低密度聚乙烯的共混树脂 (b)/(a)的重量比为70 / 30-5 / 95,优选为70/30〜20/80,更优选为60/40〜40 / 60。 至少一层所述包裹材料任选地包括1.0-30g / m 2的遮光物质。
摘要:
A film cassette assembly has a cassette and a roll of film wound on a spool and contained in the cassette. When the spool is rotated, the roll of film is rotated together with it in order to feed a film leader out of the cassette through a film passage mouth. To rotate the spool and the roll of film together, the film cassette assembly presses an axial end portion of the outermost periphery of the roll of film or presses the film's circumferential peripheral surface. Where the axial end portion of the outermost periphery of the roll of film is to be pressed, at least one of a pair of flanges of the spool is elastically deformed to clamp both axial side edges of the outermost periphery of the roll of film. Where the circumferential surface of the outermost periphery of the roll of film is to be pressed, a projection and an elastic member are provided within the cassette.
摘要:
A process for producing a photographic material, which comprises dispersing, in a solution of an organic resin, a material which is incompatible with the organic resin to form a dispersion, coating the resulting dispersion on at least one side of a support to form a coated layer, and then drying the coated layer, the material dispersed being a solid at ordinary temperature and in a liquid phase during the dispersing, whereby the coated layer when dried contains solid particles dispersed therein due to solidification of the dispersed material.The present invention also provides a photographic material obtained by the above process.
摘要:
A photographic material comprising a support having thereon at least one photographic layer with the layer adjacent the support containing non-volatile or low volatile liquid droplets having smaller diameters than the thickness of the layer adjacent the support and a process for producing the photographic material.
摘要:
A plastic case for protecting a photographic film cassette from moisture consists of a case body having a closed bottom and a lid to be fitted to an open top of the case body. The case body has a horizontal contour at least in its engaging portion with the lid, that is constituted of at least four arcs connected in series to one another, of which at least two arcs are different in radius from each other.
摘要:
A film cassette assembly has a cassette and a roll of film wound on a spool and contained in the cassette. When the spool is rotated, the roll of film is rotated together with it in order to feed a film leader out of the cassette through a film passage mouth. To rotate the spool and the roll of film together, the film cassette assembly presses an axial end portion of the outermost periphery of the roll of film or presses the film's circumferential peripheral surface. Where the axial end portion of the outermost periphery of the roll of film is to be pressed, at least one of a pair of flanges of the spool is elastically deformed to clamp both axial side edges of the outermost periphery of the roll of film. Where the circumferential surface of the outermost periphery of the roll of film is to be pressed, a projection and an elastic member are provided within the cassette.
摘要:
In a photographic film cassette, light trapping fabric is provided on each of two inside surfaces of a film passage mouth which define a film passageway. Inner recesses, retracted from the inside surfaces, have the inner edges of the light trapping fabric attached thereto, with an adhesive agent enclosing the inner edges. In a preferred embodiment, tiny grooves are formed in the recesses to provide an increased attaching force, so that a considerable degree of attachment can be maintained. Further, the cassette has two shell halves which are joined together at respective edges. A projection is formed at a first one of those edges. The second edge has a contact projection thereon, for fitting in an inside recess of the first edge. Also, a crooked portion is formed along the juncture of the respective edges. As a result, no light will come through the spacing beside the film. A film leader is advanced through the film passageway by rotating the spool to an outside of the film passage mouth. When the film leader is forced to advance, it will never peel off the light trapping fabric, and so can be advanced reliably without being stopped by the light trapping fabric.