Base course for record of sutoritsupu condition, reel null for especially photographic film

摘要

PURPOSE: To prevent a wound film from being deformed or from being fogged by connecting upper and lower sides of a hook to a film insertion side and an inclined surface of an end face on the opposite side by allowing the intersection of the appropriately selected section across the inclined surface and parallel to a lower side of the hook with the inclined surface to form an arc. CONSTITUTION: A film hook 7 having a hook shaft part 8 and a hook head part 9 is formed on an upper part of a reel groove 5. An end part of an inserted film slides on an inclined surface until it is dropped on the hook 7, and then, the film is slightly returned, and hooked in a hook gap 10 between the hook head part 9 and a groove wall 6. A hook leg part 11 agrees with a slot in the film, and intersection of the appropriately selected section parallel to the lower side of the hook 7 with an inclined surface 9a forms an arc line. Holding elements 13, 14 are formed on an upper wall of the groove 5, and an inclined part 15 to the upper side of the hook 7 is provided. The inclination 15 of the hook 7 and the holding elements 13, 14 is relatively flat.