Patent GB-571563-A (GB)
Title: Improvements in and relating to delivering dough pieces to baking tins for making bread loaves
IPC: A21C9/08
Filed: 1943-09-22
Abstract: 571,563. Moulding dough into tin loaves. HARBER, L. S., and BAKER PERKINS, Ltd. Sept. 22, 1943, No. 15542. [Class 87 (ii)] Successive pairs of flattened dough pieces are delivered on edge into a baking tin to form, when baked, a laminated loaf of the kind described in Specification 400,619, [Group VI]. Figs. 1 and 1a show a machine in which a dough piece is divided into two rounded lobes by passage between a rotating wheel 1 and a fixed surface 2, the lobes being severed from each other by a knife wheel 4. Adjustable rods 6 tilt the lobes so that the severed neck portions turn downwardly, and the two lobes, thus disposed, pass between guide reels 9 and through the bite of flattening rollers 10... 13. The two flattened dough pieces then fall on to intermittently-reciprocating panning blades 28, 22, and thence, face to face, into a baking tin 20 which is held, by a dog 40, on a continuously - moving conveyer 31 which slips beneath the tin. The dog 40 is one of several secured to a chain 39 which is urged forwardly by a friction clutch 38, but held stationary by a detent 34 which co-operates with a ratchet wheel 32. Periodically (i.e. every time dough pieces pass through the rollers), the detent 34 is momentarily lifted and the chain 39 and tin 20 move a step forward to position an empty part of the tin beneath the panning blades. The movements of the panning blades and of the baking tin are controlled by the passage of dough between the rollers. Two methods of control are described : (1) The dough pushes aside a movably-mounted roller 12, a rod 15 being pulled to the left to raise a detent 55, and, via pawl, friction clutch and cam mechanism, rocking a lever 21 which carries the panning mechanism and a lever 35 which carries the detent 34. (2) (Fig. 6, not shown). The dough piece which falls on the panning blade 29 moves a detector finger which actuates a switch to energize a solenoid which raises the detent 55. The number of dough pieces deposited in the baking tin to form a load may be 6 or 8, and in order to vary the stepwise movement of the tin to accommodate a change in the number of pieces, two ratchet wheels 32 are provided, each with its own lever 35, the lever not in use being held out of position by a finger 49 or 50. The panning blades terminate in wires 23, and in order to prevent the dough pieces from sticking to these wires and to the plates, air blasts from nozzles 44 dry these surfaces. In a modification, Fig. 8, the two flattening operations are performed by three rolls 10, 11, 13 and the pieces fall between plates 83, 89 on to intermittently-rotated arresting rollers 90 which ensure alignment of the pair of pieces and positively feed them into the tin ; an air blast from conduit 91 forces the dough pieces against rollers 90 to ensure that they do not fall therebetween. In another modification (Fig. 7, not shown), somewhat similar to that of Fig. 8, an air blast brings the upper parts of. the dough pieces together (i.e. lying against the plate 89) before they are fed into the tin. In a further modification (not illustrated), the tins may move continuously, the movement being accelerated when the tin has been filled, to allow for the interval between the tins. In the form shown, the next tin to be filled is held back by a stop 41 which is periodically tilted by a finger 43 on the chain 39. Specifications 549,854 and 564,543 also are referred to.