Photographic film cartridge

Abstract

Abstract PURPOSE:To facilitate the display of data and to prevent the damage of recycling characteristics by integrally forming a display part on the disk plate of a spool and providing an opening part for exposing the display part on a cartridge side surface. CONSTITUTION:The spool 4 is composed of a spool shaft 15 on which a film 3 is wound, a pair of flanges 16 and 17 integrally molded with the spool shaft 15 and the disk plate 18. On the front surface of the disk plate 18, a data display part 19 displaying film sensitivity, the number of frames, etc., by a binary code is provided. The display part 19 is composed of a large number of bars 20 formed in the radial direction of the disk plate 18, the front surface of the bar 20 is a granulated surface 21, and moreover, the disk plate surface between the bars is finished as a mirror surface 22. During the initial feeding of the loaded film, the disk plate 18 is rotated in a film feeding direction, as well. Thus, a bar code sensor detects the bar 20 formed on the data display part 19, so that a camera can read the displayed data.

Inventors

• 👤 Naoyuki Nishino
• 👤 直行 西納
• 👤 Hiroshi Soma
• 👤 博志 相馬
• 👤 Takashi Kubo
• 👤 隆 久保

Bibliographic Details