| 摘要 |
<p>Light-sensitive material in strip or sheet form is accommodated in a cassette with outlet slot for it, pulled out between walls with light-sealing strips extending towards the interior. The walls comprise sections converging towards the interior, then diverging. Lightwt. elastic light-sealing strips bear against the diverging sections, and meet at the converging ones. The sealing strips can be of flexible self-adhesive material e.g. cotton- or nylon-velvet, and onto which a thin reinforcing strip is glued after a narrow hinge zone.</p> |
