Patent ID: 7811510

Claim:
A continuous carburizing furnace, comprising: a furnace which comprises a carburizing zone in which carburizing processing is performed upon workpieces loaded upon trays during the conveyance of said trays along a direction of conveyance, and a plurality of regions which are arranged successively along said direction of conveyance at the upstream side of said carburizing zone; a plurality of pallets, the same in number as said plurality of regions, upon each of which one said tray is mounted, and which are movable to and fro along said direction of conveyance within a single plane; a pusher device which pushes said trays along said direction of conveyance; and a pusher-puller device which, along with pushing said plurality of pallets all together forward along said direction of conveyance, also pulls each of said plurality of pallets backward into each of said plurality of regions.