| 摘要 |
A small tubular cartridge for processing of ultra low volumes of gravity flow spent photographic fixer solution to recover residual silver therefrom. The tube cartridge comprises a hollow transparent or light transmitting flexible plastic tube of synthetic resinous material such as vinyl. The transparent tube is closed by an impervious bottom end cap which is bonded or otherwise integrally secured to the lower end of the transparent tube, with a top end cap being similarly secured to the top end of the tube and providing a central axial solution outlet opening and an eccentric solution inlet opening, each opening having a downwardly directed collar. A central solution exit tube is disposed substantially coextensive and coaxially with the transparent tube and is integrally secured as by bonding at its upper end to the central axial effluent solution opening. The axial solution exit tube has a lower bevelled end to insure that fixer solution is readily received therein and discharged from the cartridge after it has been processed. A slender coil of iron window screen having a central axial hollow passageway and an outer cylindrical surface is disposed coextensive and coaxially with the transparent tube. One axially directed free edge of the coil is unsecured at the inside axial hollow passageway and a second edge at the outside of the coil is secured against displacement by a plurality of spaced staples. The bottom of the screen is closed by a force-fit end cap which is impervious, while the top is closed by a force-fit end cap which has a central opening the diameter of which is slightly less than the diameter of the solution exit conduit. One or more spacers may be provided between the top end cap and the collar of the central axial outlet opening in the top end cap of the transparent tube to insure that the lower bevel end of the solution exit tube is sufficiently elevated above the bottom of the coil of screen to accommodate unrestricted flow into the solution exit tube even after sludge accommodates in the bottom of the tube cartridge. |
