FILM PACKET

摘要

A packet (P) for daylight-handling of photosensitive film (F, F') and a cooperating holder (H) mountable on a camera back. The packet (P) has film (F, F') removably attached to a carrier (C). The carrier (C) has, at one end (18), an asymmetrical tab (24) bearing adhesive material (60, 26) and, at its opposite end (20), a transverse light-locking element (30). Telescopically receivable over the carrier (C) and film (F, F') is a light-shielding envelope (E). The envelope (E) has an open end (46) that is closable by engagement with the light-locking element (30) and a closed end (44) with a sealing area (62) that overlies and, when grasped, adheres to the tab (24), to prevent inadvertent separation of the envelope (E) from the carrier (C). An adjacent area (64), not overlying the tab (24), is graspable for pulling the sealing area (62) free of the tab (24) and the envelope (E) away from the film (F, F'), to permit intended exposure. The envelope (E) also has, near its open end (46), a stop strip (66, 68) for limiting envelope (E) movement. The packet (P) is slidably insertable into, and withdrawable from, the cooperating holder (H), which includes a spring-loaded (132) pressure-applying member (130) for maintaining the film (F, F') in an exposure plane, a spring-loaded (140) latching member (138) engageable with the light-locking element (30) to retain the carrier (C) in place, a spring-loaded (142b, c, d) blocking member (142a) engageable with the stop strip (66, 68) to limit envelope (E) movement while the carrier (C) is retained, and a releasing member (144) that is manually actuable (184) for negating (158, 168 and 166) the spring-loadings (132, 140 and 142b, c, d) on the pressure-applying, latching, and blocking members (130, 138 and 142a), to permit unrestricted withdrawal of the packet (P) from the holder (H).