Patent GB-341426-A (GB)
Title: Improvements in charging and discharging apparatus for continuous ovens
IPC: A21B3/07
Filed: 1929-10-14
Abstract: 341,426. Bakers' ovens. WADE, H., 111, Hatton Garden, London.-(Soo. Anon. Anciens Etablissements Fetu-Defize; 55, Quai de Longdoz, Liege, Belgium.) Oct. 14, 1929, No. 31181. [Class 51 (ii).] In a baker's oven 2 having an intermittently operated conveyer comprising supports 4 suspended from side chains 3, there is provided a reciprocating device adapted, when a support 4 comes to rest opposite the opening 2a, to be moved into the oven and successively to push the baked products on to the removal conveyer 24 and deposit a fresh charge on the support 4. The charging and discharging device comprises a carriage 13 provided with rollers 13a supported on the side bars of a second carriage 14, the rollers 14a of the latter running on fixed tracks 115. The carriage 13 supports an endless band 13b passing over end rollers and secured to a bar 14b which is mounted on the carriage 14 and ensures the simultaneous movement of the two carriages into the oven when the carriage 13 has moved inwardly. a sufficient distance to bring a stop 13/ into engagement with the bar 14b. The carriage 13 is reciprocated by the engagement with a rack 13d of a pinion 140 which is traversed along a fixed rack 15 by a rocking lever 16a driven through gearing from a motor 6. When the lever 16 moves to the left from the extreme position shown in Fig. 4, the carriage 13 alone is withdrawn from the oven, this movement continuing until the engagement of a stop 13g with the bar 14b causes the two carriages to move outwardly together. The carriage 14 is rigidly held, during movement of the carriage 13 alone, by an automatic locking device comprising telescopic rods 19a, 19b, formed with pins 19d, 19/ which engage in curved slots 15d, 15f in supporting sockets 15a, 15b. The rods 19a, 19b extend through a stirrup 14d fixed to the carriage 14 and are formed, as shown in Fig. 1, with pairs of stops 19g, 19i and 19h, 19k. As the carriage 14 approaches its end positions, it effects, by engagement of the stirrup 14d with the collar 19g or 19h, longitudinal movement of the rod 19a or 19b with consequent partial rotation to bring the stop 19i or 19k into locking position. The charges are placed on a wheeled table 22 consisting of pivoted flaps 22b, 22d which are released automatically by the inward movement of the carriage 13 to dueposit the charges on the band 13b. From this . point the carriages 13, 14 move together into the oven and the baked products are pushed from the support 4 on to the conveyer 24 by the scraper plate 14g mounted on the end of the carriage 14. The delivery of the fresh charge to the support 4 is effected during the outward travel of the carriage 13 alone. When the stop 13g contacts with the bar 14b the two carriages are withdrawn together, the scraper 14g being tilted upwardly during this movement by gearing 14f, 25 operated by the engagement of a roller on the arm 25a with a cam 26a. The charging and discharging apparatus, the removal conveyer 24, and the oven conveyer 3 are all driven from the motor 6, a change speed device being incorporated in the drive for the oven conveyer so that different baking times can be obtained by causing the stoppage, opposite the opening 2a, of every second, third, &c. support 4.