摘要:
A novel black coloring material is obtained by treating a chitosan with a dyestuff of the lithospermum root. If a water-insoluble chitosan is used as the chitosan, a finely divided black coloring material is obtained, and if a gelatinous chitosan salt is used as the chitosan, a gelatinous black coloring material is obtained. If a water-soluble chitosan, chitosan oligosaccharide or D-glucosamine, or a salt thereof is used as the chitosan, a liquid black coloring material is obtained. If a powdery polymeric substance is treated with such a black coloring material, a polymer-based black coloring material is obtained, and if a fiber is dyed with such a black coloring material, the fiber is dyed to a black color having a low lightness.
摘要:
An activated carbon producing system includes a carbonizer for carbonizing cellulose triacetate as cellulose acylate to create carbonized material. A pulverizer pulverizes the carbonized material to obtain granules. An activation device activates the granules to create activated carbon. The activated carbon producing system includes a dispenser for supplying the cellulose triacetate at a plural number of times. A heating furnace is operated at each time after the dispenser operates, for thermally decomposing the cellulose triacetate from the dispenser, to obtain the carbonized material by carbonization. The pulverizer pulverizes the carbonized material in a size equal to or more than 2 mm and equal to or less than 20 mm. Temperature of the heating furnace is equal to or higher than 300 deg. C. and equal to or lower than 600 deg. C.
摘要:
A sheet film pack has a pack housing containing a plurality of sheet film units in a stack therein, a lid slidable relative to the pack housing to open or close an open top of the pack housing, and a plate spring mounted on an inner bottom surface of the pack housing to urge the stack of sheet film units toward the open top. Each sheet film unit consists of a sheet of photographic film and a plastic film sheath backing and fringing the sheet film. The plate spring has a pair of arched arms which extend parallel to each other along side zones of a bottom one of the sheet film units, such that peak areas of the arms contact the bottom sheet film unit at positions within 15 mm from side edges of the sheet film unit.
摘要:
A sheet film package contains a sheet film unit in a light-shielding envelope with an open end through which the sheet film unit is movable into and out of the light-shielding envelope. The light-shielding envelope is formed by folding a sheet of light-tight material in half to provide a folded side, and securely sealing joints of the folded sheet along a side opposite side to the folded side as well as an end opposite to the open end, wherein a middle portion of the folded side has a larger folding angle compared with end portions thereof.
摘要:
An image recording material magazine is provided that has a constitution such that a roll-form image recording material rotatably provided within a casing is drawn out through a slot provided along its whole length in the longitudinal direction with a resilient plate having a force pressing it so as to close the slot and with a cloth member abutting against the plate, the plate being fixed to a support part, which is provided within the magazine in the vicinity of the slot, at an angle that allows a force pressing the material in its thickness direction to be generated when the material is drawn out. The plate is formed from a polyolefin based resin plastic sheet having a water absorption of 0.01 wt % or less, has its surface embossed, and has its tip portion formed with a curved surface so that the embossed surface abuts against the image recording material.
摘要:
A light-sensitive material package includes a light-shielding envelope containing a stack of sheet-form light-sensitive material, the light-shielding envelope having heat-seal parts on four edges. The light-sensitive material package further includes a cushioning member, which holds down all or a part of the heat-seal parts. The light-sensitive material package further includes a fitting-type box for storing the envelope, the fitting-type box being formed from an inner box and a lid. The stiffness of the heat-seal parts is at least 0.05 N·cm.
摘要:
At one end in a running direction of a bogie, two guiding wheels are arranged, and at another end in the running direction of the bogie, two stabilizing wheels are arranged. The stabilizing wheels are positioned at a level lower than that of the guiding wheels. The stabilizing wheels function to guide the bogie along the monorail and prevent the bogie from falling off the track. With this arrangement, the total number of guiding wheels and stabilizing wheels can be reduced, and particularly, the number of the guiding wheels can be reduced. Accordingly, the bogie can be manufactured with a low cost. A traction link for connecting the bogie and the car body is arranged on one end of the bogie, and, accordingly the length of the bogie can be shortened.
摘要:
In a self-processing type film unit comprising a base sheet bearing thereon a photosensitive layer, a masking member which is attached to the base sheet and has an opening for exposing the photosensitive layer on the base sheet, a transparent cover sheet attached to the masking member at its side edges to cover the opening of the masking member with a spacer member interposed between each of the side edges and the masking member, a developing solution container enclosed by the leading end portion of the masking member which is folded back around the developing solution container over the cover sheet and attached to the cover sheet, and a developing solution trapping member enclosed by the trailing end portion of the masking member which is folded back around the developing solution trapping member over the cover sheet and attached to the cover sheet, a space formed between trailing end faces of the cover sheet and the spacer member, and the inner surface of the folded trailing end portion of the masking member at each side is closed.
摘要:
A self-processing type photographic film unit having an improved trap structure for collecting surplus processing solution used in developing the unit. The trap structure includes a partition member dividing a pouch-shaped hollow interior formed by a trap cover member into upper and lower chambers and forming a U-shaped flow path which communicates with gas discharging through-holes formed in the upper surface of the trap cover member. First and second spacer members are provided on the lower and upper surfaces of the partition member with the first and second spacer members permitting the U-shaped flow path to pass gas in the unit while catching surplus processing solution.
摘要:
A film-packet for accommodating a predetermined number of film-units each to be used as an image carrying member for a camera based on the diffusion transfer process, which film-packet is provided with a recessed portion integrally formed on its rear side for seizing the end of a sheet-like article.When all the film-units are used up, the box-like case of the film-packet may be utilized as a picture-holder of a picture-stand assembled, with a covering member of the film-units being seized by the recessed portion at its one end for functioning as a supporting leg of the picture stand.