Abstract: A feeding bobbin including a winding shaft including two ends each having a flange detachable mounted thereon, the shaft being common to various feeding bobbins for a thermal transfer printer, wherein the flanges are separated by a width corresponding to the width of a thermal transfer sheet or image receiving sheet to be wound around the winding shaft, and the winding shaft includes a portion for receiving such sheet wound thereon, the portion having a width regulatable by location of a combination of the flanges according to the width of such sheet.

Abstract: An object of the present invention is to provide a feeding bobbin in which, in winding a thermal transfer sheet or image receiving sheet having a different size (width), onto the feeding bobbin, work on the side of a small roll winding device is easy, thermal transfer sheets or image receiving sheets different from each other in size (width) can be used in various thermal transfer printers, and the feeding bobbin can be recycled without the necessity of disposal and without causing any trouble, and to provide a method for recycling the feeding bobbin. The feeding bobbin is a feeding bobbin 1 comprising a common winding shaft 4 and flanges 2 mounted detachably respectively on both ends 61, 62 of the winding shaft 4.

Abstract: A spool structure of the invention includes a cylindrical core, which has a smooth outer surface and an inner surface. An engaging part is formed on the inner surface. A flange is connected to the core. The flange has a jaw part that can be arranged at a side end of the core, and a nail part that can engage with the engaging part of the inner surface of the core.

Abstract: A film cassette consists of a relatively small number of parts and is capable of effectively preventing the slackening of a film held therein during transportation. The film cassette has a package containing a feed bobbin (40) and a takeup bobbin (50) and including a first half case (10) and a second half case (20). Positioning tongues (20b) formed integrally with the second half case (20) determine the axial positions of the feed bobbin (40) and the takeup bobbin (50). Projections (10a) formed on the first half case (10) engage in grooves (40a, 50a) formed in wheels (40c, 50c) of the feed bobbin (40) and the takeup bobbin (50), respectively to prevent the feed bobbin (40) and the takeup bobbin (50) from unnecessary rotation during transportation. The first half case (10) and the second half case (20) are fastened together by hooks (12) formed integrally with the first half case (10).

Abstract: A spool structure of the invention includes a cylindrical core, which has a smooth outer surface and an inner surface. An engaging part is formed on the inner surface. A flange is connected to the core. The flange has a jaw part that can be arranged at a side end of the core, and a nail part that can engage with the engaging part of the inner surface of the core.