Oven supplied with hot air through foraminous duct-shelves

Claim 1

A FOOD PROCESSING OVEN COMPRISING AN ENCLOSURE INCLUDING FIRST AND SECOND PARALLEL SIDE WALLS; A PLURALITY OF VERTICALLY SPACED HORIZONTALLY EXTENDING ARTICLE SUPPORTING DUCTS MOUNTED WITHIN SAID ENCLOSURE HAVING FORAMINOUS UPPER AND LOWER HORIZONTAL WALL PORTIONS AND DEFINING VERTICALLY SPACED FOOD PROCESSING SPACES THEREBETWEEN; A PLURALITY OF AIR INLET OPENINGS THROUGH SAID FIRST SIDE WALL RESPECTIVELY COMMUNICATING WITH SAID DUCTS; SAID DUCTS HAVING IMPERFORATE UPPER AND LOWER WALL PORTIONS EXTENDING A PREDETERMINED DISTANCE FROM SAID INLET OPENING, WHEREBY A GENERALLY HORIZONTAL FLOW OF AIR IS ESTABLISHED THROUGH THE PORTION OF EACH OF SAID DUCTS ADJOINING SAID AIR INLET OPENINGS; A PLURALITY OF AIR OUTLET OPENINGS IN SAID SECOND SIDE WALL RESPECTIVELY COMMUNICATING WITH SAID FOOD PROCESSING SPACES; AND MEANS FOR CIRCULATING HEATED AIR INTO SAID ENCLOSURE THROUGH SAID INLET OPENINGS AND WITHDRAWING AIR FROM SAID ENCLOSURE THROUGH SAID AIR OUTLET OPENINGS.