Patent ID: 7785516

Claim:
A method of manufacturing a reusable filtration device for removing particulate matter from a liquid in a photographic processing system, said method comprising: providing a tubular sleeve from a filtration material; disposing the tubular sleeve about a mold core; placing the mold core within a mold cavity; and injection molding the filtration device within the mold cavity in an injection molding process, thereby forming the filtration device comprising a tubular body having a body wall defining a rigid support structure having a plurality of inlet openings, the body wall further comprising an inside wall structure and an outside wall structure; a central bore extending through the tubular body and being coextensive with the body wall; the body wall terminating in a pair of opposing end portions, one of said end portions defining an attachment end portion adapted for attachment to a filtration device holder in the photographic processing system and said opposing end portion defining an outlet end portion including an outlet opening adapted for passage of filtered liquid exiting the central bore; and the tubular sleeve of filtration material being disposed between the inside wall structure and the outside wall structure of the body wall, thereby filling the plurality of inlet openings; wherein said injection molding includes forming the outside wall structure as a plurality of transverse and longitudinal struts so as to define the plurality of inlet openings therebetween; wherein said injection molding includes forming the inside wall structure as a plurality of longitudinally extending ribs, the ribs being axially aligned with the longitudinal struts such that the filtration material is sealed therebetween during said molding step; and wherein said injection molding step comprises a single step injection molding process.