Patent GB-728542-A (GB)
Title: A process and apparatus for use in manufacturing plates, particularly plates consisting of wood particles and binders
IPC: B27N3/22
Filed: 1953-03-03
Abstract: 728,542. Stacking plates. FAHRNI, F. March 3, 1953 [March 5, 1952], No. 5834/53. Class 78 (4). [Also in Groups V and XVI] A device for delivering plates, particularly plates consisting of wood particles and a binder, from a multi-stage press comprises means for shifting the plates from the press into a frame which has holding members to support the edges of the plates and releasing means cooperating with the holding members by which all the holding members can be moved simultaneously in such a manner that the plates are no longer supported but drop freely, at least two holding members for carrying each plate being arranged at the same level. Each plate 1a in the multi-stage press 3 rests on a pallet 2a. Rods 8, having panels 9 at their ends which are caused by blade springs 10 to engage slots in the plates 2a, Fig. 2, adjustable by screws 14, are retracted and thus draw the pallets and plates into an emptying frame 6. The plates 1b in the frame 6 are then pushed off the pallets 26 by rods 17 into a stacking frame 35, another rod, indicated by chain-dotted line 33, Fig. 3, advancing with the rods 17. Two girders 37 serve as rails for two carriages 44, one each side of the frame and joined by brackets 41, 42. Depending from each carriage is a framework 45, 46 on the vertical member 46 of which are pivoted a series of links 54, one for each plate, to each of which is attached a holding-bar 50 and whose ends are all pivoted to a rod 52 which depends from a link 68 which is held up in the position shown in Fig. 3 by a pawl 60, so long as the pawl is held in locking position by a lever 70 which is carried by, and pivoted to, the carriage 44. A similar arrangement of holding- bars 51, one each side of the frame, has its rod 53 depending from a link 69 locked by a pawl 61 held by a bell crank 74 pivoted on the girder 37. When the plates enter the stacking frame the carriages 44 are in the position where the holding-bars 50, 51 are close together, i.e. at the right in Fig. 3 as shown dotted. The plates move over the holding-bars till their leading edges are some way beyond them, when the rod 33 meets the bracket 41 and pushes the carriages 44 to the other extreme position (chain-dotted), the plates 1c then resting at their opposite edges on the holding-bars 50, 51. At this position of the carriages 44 their levers 70 are next to levers 77 pivoted to the girders 37 and coupled through rods 79 to the bell cranks 74. A truck is wheeled beneath the superposed plates and a rod 81 is then pulled, so rotating the bell cranks 77 which depress the levers 70 and release the pawls 60, the pawls 61 being released by the simultaneous movement of the bell cranks 74, with the result that the rods 52, 53 drop and as they do so the links 54, 55 rotate and the holding-bars 50, 51 turn to the position in which they no longer support the edges of the plates which therefore drop and form a stack on the truck. To guard against unequal cooling stresses the top plate is covered. Hand-levers 83, 84 on the ends of the rods 52, 53 enable the bars 50, 51 to be restored to their plate-holding position.