Abstract: An attachment apparatus and method for attaching a disc protective sheet to at least one half of a magnetic disc cartridge body include a supporting mechanism that supports each half body section of the cartridge body. The apparatus and method also include a supply mechanism that provides disc protective sheets to the one half body section. Each protective sheet is punched from a web of material and includes a cutout that corresponds to an opening provided in the one half body section to expose part of a magnetic disc held within the body when assembled. Each protective sheet also includes a thermal fusible layer on an attachment surface opposite a surface that will face a disc when the cartridge body is assembled. Each protective sheet to be assembled is arranged so that the cutout and the opening in the one half body section corresponds to one another. A fusing mechanism has a shape that is slightly larger than that of the protective sheets and is positioned directly over the supporting mechanism.

Abstract: An attachment apparatus for disc protective sheet which is adapted for attaching disc protective sheet for protecting disc rotatably accommodated within a cartridge body formed by connecting or joining a pair of upper and lower halves with respect to the surface opposite to the disc of the half.

Abstract: An attachment apparatus and method for attaching a disc protective sheet to at least one half of a magnetic disc cartridge body include a supporting mechanism that supports each half body section of the cartridge body. The apparatus and method also include a supply mechanism that provides disc protective sheets to the one half body section. Each protective sheet is punched from a web of material and includes a cutout that corresponds to an opening provided in the one half body section to expose part of a magnetic disc held within the body when assembled. Each protective sheet also includes a thermal fusible layer on an attachment surface opposite a surface that will face a disc when the cartridge body is assembled. Each protective sheet to be assembled is arranged so that the cutout and the opening in the one half body section corresponds to one another. A fusing mechanism has a shape that is slightly larger than that of the protective sheets and is positioned directly over the supporting mechanism.

Abstract: A disc cartridge assembling apparatus in which a protuberance formed on the inner surface of one of cartridge halves of a thermoplastic resin making up a main cartridge body unit is passed through a through-hole formed in the other cartridge half in register with the protuberance, and in which the distal end of the protuberance is thermally deformed to interconnect the cartridge halves. The upper and lower cartridge halves are stacked together, with a protuberance formed on the upper cartridge half being passed through the through-hole formed in the upper cartridge half, and are held by a holding mechanism. In this state, the distal end of the protuberance is thermally deformed by a caulking head, heated by a heater, and which is provided with a recess in its surface adapted to compress against the protuberance. Then, as the caulking head is moved away from the thermally deformed protuberance, the caulking head and the protuberance are cooled by a cooling mechanism.