Fuji Photo Film Company, Limited

Akira Tomita

Seiichi Watanabe

Naoyoshi Chino

Keiji Shigesada

Masahiro Enomoto

Tadashi Mochizuki

Mototada Yasui

Kazunori Mizuno

Nobuo Sugiyama

Takao Uchida

A process for forming a light-reflecting bar code on an end disc of photographic film spool is performed by the steps of placing on the end disc of photographic film spool a hot-stamp film comprising, in order, an adhesive layer, a light-reflecting metal layer, a transparent protective layer, a releasing layer, a support film, and a stain-shielding layer formed of material inhibiting migration of a compound having a low molecular weight from the support film (e.g., compound having a siloxane bonding or deposited inorganic oxide) in such manner that the adhesive layer is brought into contact with the end disc, and pressing for 0.1 to 2.0 seconds a stamper having a heated bar code-stamping die, so as to transfer the light-reflecting metal layer onto the end disc in the form of the bar code.

Formation of light-reflecting bar code on end disc of photographic film spool

A photo film cassette has a spool core about which photo film is wound in a form of a roll. A cassette shell contains the spool core in a rotatable manner. Two flanges have a disk shape, and are secured to respective ends of the spool core, for regulating lateral edges of the roll of the photo film. A circumferential lip is disposed on each flange, is extended toward the opposite one of the flanges, wraps one of the lateral edges of an outermost turn of the photo film of the roll, and prevents the photo film from being loosened. A rim portion is disposed on an circular edge of the circumferential lip confronted with the opposite one of the flanges, to project with a bend away from the spool core. A contact face is disposed on the rim portion, and contacts the one of the lateral edges of the photo film when the photo film is unwound from the spool core or wound back about the spool core. The contact face has a contact range of 0.15-0.8 mm in contacting the one of the lateral edges of the photo film.

Photo film cassette

A photo film cassette has a spool core about which photo film is wound in a form of a roll. A cassette shell contains the spool core in a rotatable manner. Two flanges have a disk shape, and are secured to respective ends of the spool core, for regulating lateral edges of the roll of the photo film. A circumferential lip is disposed on each flange, is extended toward the opposite one of the flanges, wraps one of the lateral edges of an outermost turn of the photo film of the roll, and prevents the photo film from being loosened. A rim portion is disposed on an circular edge of the circumferential lip confronted with the opposite one of the flanges, to project with a bend away from the spool core. A contact face is disposed on the rim portion, and contacts the one of the lateral edges of the photo film when the photo film is unwound from the spool core or wound back about the spool core. The contact face has a contact range of 0.15-0.8 mm in contacting the one of the lateral edges of the photo film. At least one support projection projects from an axially outer face of said flange.

A photo film cassette has a spool core about which photo film is wound in a form of a roll. A cassette shell contains the spool core in a rotatable manner. Two flanges have a disk shape, and are secured to respective ends of the spool core, for regulating lateral edges of the roll of the photo film. A circumferential lip is disposed on each flange, is extended toward the opposite one of the flanges, wraps one of the lateral edges of an outermost turn of the photo film of the roll, and prevents the photo film from being loosened. A rim portion is disposed on an circular edge of the circumferential lip confronted with the opposite one of the flanges, to project with a bend away from the spool core. A contact face is disposed on the rim portion, and contacts the one of the lateral edges of the photo film when the photo film is unwound from the spool core or wound back about the spool core. The contact face has a contact range of 0.15.0.8 mm in contacting the one of the lateral edges of the photo film.

In manufacturing a photo film cassette, a disk producing apparatus includes a web supplier which conveys the web from a web roll to the web conveyor. The web conveyor includes two chains which convey the web in an intermittent fashion, and which include pointed portions which serially penetrate an edge portion of the web. A heater disposed upstream from the web conveyor heats the edges of the web. At the heating/forming unit, a heating plate is lowered toward the web at the same time as the female mold is raised toward the web, and the web is squeezed between them before the heating and vacuum/air pressure forming takes. Clampers/coolers disposed upstream and downstream from the heating plate and female mold squeeze the web in fixed fashion to prevent wrinkles on the web. A web/sheet cutter device includes an upper punch above the web and a lower die under the web, which squeeze the web, and cut the web into a sheet having a plurality of disk-like portions. The web is then wound by the web winder and reused later. The sheet cut from the web is separated from the web by a knockout device incorporated in the upper punch, dropped down through the lower die, and stacked on a sheet stacking container disposed on a movable bottom plate.

Disk producing apparatus for manufacturing a photo film cassette

A photo film cassette has a spool core on which photo film (14) wound in a form of a roll. A disk (19, 20) has an axial hole (19a, 20a) formed therein, and is secured to each of ends of the spool core, for regulating ends of the roll of the photo film in the cassette. A sheet (74) of thermoplastic synthetic resin is supplied one after another. There are plural disk-like portions (65) and a positioning portion (66) formed on the sheet. A positioning pin (112) is fitted on the positioning portion of the sheet being supplied, for positioning the sheet. An upper blade group (106) includes 12 upper blades (110, 111). An lower blade group (107) includes 12 lower blades (114, 115). The upper and lower blade groups squeeze 12 of the disk-like portions while the sheet is positioned by the positioning device, for punching the axial hole and a contour of the disk, to obtain 12 disks. A vacuum pump (152) is caused by a valve (156) to suck the 12 disks on the upper blade group, to remove the 12 disks from the sheet. The vacuum pump is caused by a valve (158) to suck dust punched from the axial hole in the 12 disks through the lower blade group, to eject the punched dust. Stacker pins (103) stack the 12 disks from the upper blade group. A sheet remover (88) exits the sheet after punching plural disks.

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Kanagawa, Japan

Akira Tomita