Processing unit with a replenishing system

Claim 1

IN A PHOTOPGRAPHIC PROCESSING APPARATUS FOR DEVELOPING A LATENT IMAGE CARRIED BY A PRINT MATERIAL THROUGH CONTACT WITH A PROCESSING SOLUTION FROM A SUPPLY THEREOF AND HAVING; (A) FIRST WALL MEANS FORMING A CONTAINER FOR SAID PROCESSING SOLUTION, (B) SECOND WALL MEANS COMPLEMENTARY TO AND SPACED FROM SAID FIRST WALL MEANS TO FORM A PATH WHICH IS SUBSTANTIALLY FILLED WITH SOLUTION FOR GUIDING SAID MATERIAL THROUGH THE SOLUTION, AND (C) MEANS FOR MOVING SAID MATERIAL THROUGH SAID PATH, THE IMPROVEMENT WHICH COMPRISES: (1) A RESERVOIR FOR SAID SOLUTION FORMED IN SAID SECOND WALL MEANS, SAID RESERVOIR BEING OPEN ALONG SAID PATH ON THE UNDERSIDE OF SAID SECOND WALL MEANS AND BEING SO DISPOSED RELATIVE TO SAID FIRST WALL MEANS THAT THE OPEN RESERVOIR IS CLOSED BY THE MATERIAL WHEN IN SAID PATH ADJACENT TO THE RESERVOIR, AND (2) MEANS FOR FEEDING SOLUTION FROM SAID SUPPLY TO SAID RESERVOIR IN RELATION SO TIMED TO THE MOVEMENT OF SAID MATERIAL THROUGH SAID PATH, THAT THE SOLUTION IS TEMPORARILY HELD IN THE RESERVOIR BY THE MATERIAL THEN PASSING THROUGH SAID PATH.