Patent GB-702663-A (GB)
Title: Improvements in and relating to the manufacture of tin bread
Inventor: WILSON GEORGE DONALD
IPC: A21B7/00
Filed: 1950-01-16
Abstract: 702,663. Bakery plant. BAKER PERKINS, Ltd. April 13, 1951 [Jan. 16, 1950], No. 1084/50. Class 28(1) Automatic bakery plant, wherein the tins are formed into groups, before being fed to the final prover, which groups are maintained throughout the operation, has a final prover or oven, or both of the tunnel type drivable at a variable rate. The automatic operation may extend to a dough divider 9, hander-up 10 and first prover 11 which are arranged with the moulder-panner 8, tunnel type final prover unit 1, tunnel type oven unit 2, detinning machine 7 and cooler 5 as shown in Fig. 1. The conveyers used throughout may be of the fish scale type or of the slatted type with fish scale turns. Preferably 2 lb. tins are strapped in sets of three and 1 lb. tins in sets of four. The moulder panner 8 delivers dough pieces to the tins at tin filling station A, the tins being advanced in single file by in-feed conveyer 12. An automatic monitoring device comprising a light source and photo electric cell is arranged to prevent dough pieces being fed from the moulder-panner in the absence of tins. The absence of tins does not affect the automatic operation but merely delays the completion of a group or causes the absence of a whole group throughout the operations. The tins travel from filling station A on conveyer 12 to final prover unit charging station B where they are arranged in single file groups, e.g. by mechanism as described in Specification 647,446, [Group XXX]. Each group forms a load extending transversely the full width of the prover sole, e.g. four sets of three 2 lb. tins or five sets of four 1 lb tins. The groups are fed on to the prover sole by pusher gear 18 and carried to the discharge end 20 of the tunnel where magetic puller gear 23, e.g. as described in Specification 659,117, [Group XXX], pulls each group on to transfer conveyer 21 which carries the tins to the oven unit charging station D. This conveyer is driven intermittently, each step carrying one group of tins from the prover unit discharging station to the oven unit charging station. Pusher gear 24 pushes each group of tins from conveyer 21 on to the oven sole from which they are discharged at end 4 by magnetic puller gear 25 on to intermittently travelling transfer conveyer 26 running perpendicularly to the oven sole. Conveyer 26 carries the groups in steps to the detinning machine 7, e.g. as described in Specification 681,605. The groups are fed from conveyer 26 by pusher gear 27 and then ejected on to detinning machine-cooler unit conveyer 28. Cooling unit 5 is preferably of the swing tray type having finger trays charged and discharged by comb plates as described in Specifications 696,123, [Group XXX], and 700,976. In a modification, Fig. 2 (not shown), the tins are arranged in column groups. Other modifications are described in which either the tunnel type final prover or the tunnel type oven is replaced by a similar unit of the swing tray type. Specifications 631,995, [Group XXX], and 700,977, also are referred to.