Fuji Photo Film Company, Limited

Yasuhiko Kitamura

Yoshio Hara

Taro Okutsu

Bungo Shigeta

Katsumasa Okada

Hitoshi Komiyama

Hirofumi Abe

Hiromasa Nagai

Norihiro Kadota

Masafumi Fukugawa

Koichi Nakatogawa

Akihisa Inoue

A light-shielding packaging for a roll of continuous photosensitive web wound on a core having on its each end a light-shielding flange disc has at its leading end a heat-shrinkable light-shielding leader sheet having a thickness of 30 to 200 &mgr;m which shows a heat shrinkage ratio at 50&deg; C. of lower than 1% both in the longitudinal and width directions and a heat shrinkage ratio at 100&deg; C. in the range of 5% to 30% in the longitudinal direction and a heat shrinkage ratio at 100&deg; C. of less than the heat shrinkage ratio in the longitudinal direction by 1% or more in the width direction. The leader sheet has a length larger than the length of the outermost convolution of the roll and a width larger than the distance between the outer face of one flange disc and the outer face of another flange disc, and each side portion of the leader sheet is light-tightly attached by heat shrinkage to the outer face of the flange disc at least at a portion adjacent to the periphery of the flange disc.

Light shielding packaging system for photosensitive web roll

A light-shielding packaging for a roll of continuous photosensitive web wound on a core having on its both ends a light-shielding flange disc has at its leading end a heat-shrinkable light-shielding leader sheet having a thickness of 30 to 200 &mgr;m which shows a heat shrinkage ratio of 5 to 30% in the longitudinal direction of the web at a temperature in the range of 60 to 140&deg; C. and a heat shrinkage ratio of less than 5% in its width direction at the same temperature. The leader sheet has a length larger than the length of the outermost convolution of the roll and a width larger than the distance between the outer face of one flange disc and the outer face of another flange disc, and each side portion of the leader sheet is light-tightly attached by heat shrinkage to the outer face of the flange disc at least at a portion adjacent to the periphery of the flange disc.

Light-Shielding packaging system for photosensitive web roll

A film sheath, holding a sheet film to constitute a sheet film unit, is formed from a plastic resin, and is provided with at least a tapered portion in an end fringe which is directed toward a leading end of a sliding lid when the sliding lid is moved back to a closed position in a sheet film pack containing a stack of such sheet film units, so as to provide a sufficiently large gap between two of the stacked sheet film units, for smooth thrusting of the sliding lid into between the two sheet film units. The film sheath also has a protuberance in a corner of an open end, as a stop member for stopping the sheet film from slipping out of the film sheath.

Film sheet unit which easily accepts a lid of a film pack

A sheet film pack has a pack housing for receiving a plurality of sheet film units in a stack, and a lid for closing an opening of the pack housing, through which a topmost sheet film unit of the stack is placed in an exposure position. The exposure position is defined by an exposure frame of a pack holder which holds the sheet film pack and is attached to a camera. A film recovery mouth for recovering exposed sheet films one after another is formed in a trailing end of the pack housing, and a cap for closing the film recovery mouth and holding the lid in the closed position is removably attached to the pack housing. The lid is guided along guide rails which are formed on lateral sides of the pack housing to slidably hold lateral edges of the lid. The guide rails extend beyond the film recovery mouth such that the trailing ends of the guide rails are placed inside the cap when the cap is attached to the pack housing. A resilient light-trapping ribbon is disposed on a sliding surface of the pack housing for the lid. The ribbon has a free portion which protrudes toward the lid to be resiliently bent by the lid.

Sheet film pack with a pair of extended guide rails

A sheet film pack has a pack housing for receiving a plurality of sheet film units in a stack, and a lid for closing an opening of the pack housing, through which a topmost sheet film unit of the stack is placed in an exposure position. The exposure position is defined by an exposure frame of a pack holder which holds the sheet film pack and is attached to a camera. A film recovery mouth for recovering exposed sheet films one after another is formed in a trailing end of the pack housing, and a cap for closing the film recovery mouth and holding the lid in the closed position is removably attached to the pack housing. The lid is guided along guide rails which are formed on lateral sides of the pack housing to slidably hold lateral edges of the lid. The guide rails extend beyond the film recovery mouth such that the trailing ends of the guide rails are placed inside the cap when the cap is attached to the pack housing. A resilient light-trapping ribbon is disposed in a V-groove formed on a sliding surface of the pack housing for the lid. The ribbon has a free portion which protrudes toward the lid to be resiliently bent by the lid.

Growing community of inventors

Kanagawa, Japan

Yasuhiko Kitamura