Patent GB-655350-A (GB)
Title: Improvements in or relating to sheet delivery mechanism applicable for use in connection with printing and other machines
IPC: B65H31/20
Filed: 1947-11-06
Abstract: 655,350. Sheet-delivery apparatus. TIMSONS, Ltd., and TIMSON, E. A. Nov. 6, 1947, No. 29614. [Class 100 (i)] In a sheet-delivery mechanism of the kind having means whereby the sheets are carried to a piling position 3, an adjustable support on which the sheets are piled, a sheet-controlling device 15, a jogger device 17, and fixed back-stops 14, the control device, jogger and back-stops are all mounted on a common carrier 10 longitudinally adjustable in relation to the sheet-piling position to enable adjustment of these parts to be readily and simultaneously effected to suit sheets of different sizes. The sheets are delivered by grippers 2 on chains 1, Fig. 1A, to a position above the carrier 10 where they are then controlled by the device 15 in the form of suction nozzles, Fig. 3, which engage the rear edges of the sheets after their release by the grippers and travel forwardly and downwardly carrying the sheets to the top of a pile 4 and, by a retracting movement, bring the sheets back against the back-stops 14 extending forwardly and downwardly from the carrier 10. The carrier 10 includes two tubular portions 12 slidably adjustable on rods 13, and the sheets, which are fed between bands 7-8 to the mechanism, are supported therebetween by tapes 36 attached to the carrier 10 and which extend rearwardly over a rod 37 and are weighted so that they are kept taut for all adjustments of the carrier. The carrier has, suspended from the forward end of the tubular portions 12 by two levers 20 and at the rear by two levers 21 pivoted to a shaft 31, a pair of side-plates 19 joined at the front by a channel 18 carrying the jogger 17. Pivotally mounted on the plates 19 are two pairs of levers 24, 35, each pair joined together by links 25 attached to which is an air chamber 16 carrying the suction nozzles 15. One of the links 25, Fig. 2, has a roller 23 which engages in a channel member 22 reciprocated upwardly and downwardly from a lever 26 oscillated by a cam 28 on a driving-shaft 9, Fig. 4, to transmit the vertical motion to the nozzles 15. The forward movement to the nozzles is derived from the plate 19 which is swung forwardly by the links 21, rocked by a shaft 31, Fig. 2, forming the suspension of the links and which is oscillated by an arm 32 moved upwardly and downwardly by the action of a roller 33 thereon in a second channel 34 reciprocated by a further driving-cam on the shaft 9. The nozzles may also act to control the height of the pile 4 which is supported by suspension wires 40, 41, Fig. 1A, wound at their upper ends on a winding-drum 44 on a shaft 45, Fig. 4. Shaft 45 is driven by a worm-and-pinion 47, 46 from a ratchet drive 48-51 actuated by a lever 52 operated from a cam 54 to lower the support as the pile gets higher. When the pile is normal or low the channel member 22 is fully lowered and the oscillating lever 26 is fully rotated clockwise an amount permitted by the cam 28, whereupon extension 26c engages an adjustable screw 59 on a trip-lever 55 which is thus moved to engage in a notch 57 in a pin 58 on the lever 52 moved by the cam 54 into receiving position. With the lever 52 held anticlockwise no operation of the pile-lowering ratchet occurs. When the high portion of cam 54 next engages follower 53, lever 26 is moved enough to release trip 55 which is immediately acted on again by arm 26c and if the pile is still low is latched again into notch 57. When, however, the pile becomes high the channel member 22 is not fully lowered and arm 26c does not rotate sufficiently to move trip 55 into engagement with the notch 57 so that lever 52 completely follows the cam 54 causing operation of the pile lowering ratchet mechanism. Specification 477,620 is referred to.