Abstract: A fluid dispensing apparatus includes a mounting assembly having a plurality of mounting apertures and a plurality of fluid dispensing cartridges positioned within the mounting apertures. The mounting apertures and cartridges include matching cross-sectional profiles that lack symmetry. Each fluid dispensing cartridge includes a fluid reservoir, at least one valve, a metering chamber and a piston. The apparatus also includes a magnetic switch assembly controlling the movement of the piston and a means for damping the movement of the piston.

Abstract: A fluid dispensing apparatus includes a mounting assembly having a plurality of mounting apertures and a plurality of fluid dispensing cartridges positioned within the mounting apertures. The mounting apertures and cartridges include matching cross-sectional profiles that lack symmetry. Each fluid dispensing cartridge includes a fluid reservoir, at least one valve, a metering chamber and a piston. The apparatus also includes a magnetic switch assembly controlling the movement of the piston and a means for damping the movement of the piston.

Abstract: A roll film processor for developing film wound into a roll. The processor has a plurality of substantially aligned tanks containing processing liquids. A removable film drive module having a "U" shaped section for each tank carries the film along a serpentine path through the tanks. Each "U" shaped section has down path leg for carrying the film into the liquid and an up path leg for carrying the film out of the liquid. The rollers for moving the film are positioned outside the liquid. Opposed "V" shaped grooves guide the edges of the film in the liquid. One of the grooves is on a front portion of the drive module and the other is on a rear portion. If a jam occurs, the film drive module is removed from the processor and opened by removing retainer clips by hand from retainer pins. The grooves are thereby separated allowing removal of the jammed film. Reassembly of the film drive module on the processor is facilitated by latitudinally flexible couplers for the module drive shafts.