Abstract: Methods of recycling printer cartridges use special rail-type clips for reassembly of complementary halves of a printer cartridge, the clips comprising cutouts or gaps spaced along the length thereof which accommodate protrusions near the edges being joined. The invention allows for recovering these cartridges and avoiding the cost of discarding a fairly costly machine element while additionally avoiding the processing costs for rendering the cartridge into inert, non-polluting waste.

Abstract: A device for dispensing a predetermined amount of powder from a storage chamber and including a lower measuring chamber. The amount of powder delivered from the measuring chamber is rigourously constant from dispensing stroke to dispensing stroke. The capacity of the measuring chamber can be finely adjusted in accordance with a graduation scale. The dispenser includes a pair of valves and a pusher rod actuating the valves, the lower valve closable under gravity, the upper valve being biased by a single coil spring mounted around the rod. The biasing coil spring is shielded by a sleeve from both chambers, so that the powder never comes in contact with the coil spring.