Abstract: A band-like matter fastening seal for fixing a wound end of a band-like matter that is wound in a roll form to the body of said band-like matter, includes: a first attaching part adhered to said end of the band-like matter; a second attaching part having an attaching side adhered to the body of the matter in order to fasten the end to the body of the matter; and a handle part extended from the second attaching part, the attaching side being exposed when the attaching side is lifted from a masking side covering the attaching side, wherein the handle part rises up along the tangent line of the roll when a portion of the band-like matter fastening seal in the vicinity of the handle part is curved.

Abstract: The invention relates to a photographic roll film such as Brownie film, particularly to a sealing tape, used for the photographic roll film, which can seal a roll of film easily and reliably without the need for licking adhesive on a sealing tape as in a conventional one. The sealing tape includes a bonding portion and a release portion which are made of a single tape base. The bonding portion has a bond layer coated on the tape base for securing the sealing tape to a surface of light-shielding paper, the release portion made of a folded-over portion formed by folding over the tape base includes a tacky layer and a release layer inside the folded-over portion which are coated on the tape base separately and directly face each other and an end of the tape base is secured to the end portion of the bond layer.

Abstract: A band-like matter fastening seal for fixing a wound end of a band-like matter that is wound in a roll form to the body of said band-like matter, includes: a first attaching part adhered to said end of the band-like matter; a second attaching part having an attaching side adhered to the body of the matter in order to fasten the end to the body of the matter; and a handle part extended from the second attaching part, the attaching side being exposed when the attaching side is lifted from a masking side covering the attaching side, wherein the handle part rises up along the tangent line of the roll when a portion of the band-like matter fastening seal in the vicinity of the handle part is curved.

Abstract: The invention relates to a photographic roll film such as Brownie film, particularly to a sealing tape, used for the photographic roll film, which can seal a roll of film easily and reliably without the need for licking adhesive on a sealing tape as in a conventional one. The sealing tape includes a bonding portion and a release portion which are made of a single tape base. The bonding portion has a bond layer coated on the tape base for securing the sealing tape to a surface of light-shielding paper, the release portion made of a folded-over portion formed by folding over the tape base includes a tacky layer and a release layer inside the folded-over portion which are coated on the tape base separately and directly face each other and an end of the tape base is secured to the end portion of the bond layer.

Abstract: 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.

Abstract: 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.

Abstract: A photo film cassette includes a spool core, on which the photo film is wound in a form of roll. A cassette shell contains the spool core in rotatable fashion. First and second flanges are respectively secured to ends of the spool core, for regulating positions of sides of the photo film roll. A first ring-like lip is formed integrally with a periphery of the first flange, is projected toward the roll, is contacted on one edge of an outermost turn of the roll, and prevent the roll from being loosened. The first and second flanges are formed from resin in accordance with injection molding. The resin has temperature of thermal deformation being 80° C. or higher under 18.6 kg/cm2, modulus in elasticity in flexure being 13,000-30,000 kg/cm2, surface hardness being 80 or more in Rockwell R-scale, and high fluidity in molds for the injection molding. The first and second flanges have an outer diameter of 15 mm or more, thickness of 0.

Abstract: 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.

Abstract: A photo film cassette includes a spool core, on which the photo film is wound in a form of roll. A cassette shell contains the spool core in rotatable fashion. First and second flanges are respectively secured to ends of the spool core, for regulating positions of sides of the photo film roll. A first ring-like lip is formed integrally with a periphery of the first flange, is projected toward the roll, is contacted on one edge of an outermost turn of the roll, and prevent the roll from being loosened. The first and second flanges are formed from resin in accordance with injection molding. The resin has temperature of thermal deformation being 80.degree. C. or higher under 18.6 kg/cm.sup.2, modulus in elasticity in flexure being 13,000-30,000 kg/cm.sup.2, surface hardness being 80 or more in Rockwell R-scale, and high fluidity in molds for the injection molding. The first and second flanges have an outer diameter of 15 mm or more, thickness of 0.3 mm or less, and a maximum projected area of 100 mm.sup.

Abstract: A photographic film cassette has a spool with a roll of filmstrip wound thereon, a disc secured to or formed integrally with the spool, and a bar code disposed on an outer surface of the disc. The bar code is constituted of a pattern of alternating low level segments and high level segments arranged in correspondence with a bit pattern of binary data. According to the invention, the low level segments are formed by the outer surface of the disc, and the high level segments are formed by hot stamping a high reflective material onto the outer surface of the disc. The outer surface of the disc has a surface roughness of 0.1 .mu.m to 20 .mu.m.