Patent GB-1278754-A (GB)
Title: A bale press with tying mechanism for bales
Inventor: PERSSON BENGT AKE
IPC: B65B13/28
Filed: 1971-03-18
Abstract: 1278754 Twisting wires together PERSONER AB 18 March 1971 7200/71 Heading B3E [Also in Division B8] A bale press in which bales are tied and compacted against an applied back-pressure comprises a hopper 10 for supplying material such as waste paper, metal scrap &c., into a bale case 11 which accommodates a plunger 12 reciprocatable past the opening of the hopper 10 by means of an hydraulic motor, not shown, to compact the material against the counterpressure of a spring-loaded, frictional gate 13, the compacted material being formed into bound bales of a definite length by tying mechanism which comprises three needles 18, mounted on a lower frame 19, vertically reciprocatable by hydraulic rams 21, and a corresponding number of pairs of twisters 28 carried by an upper frame 29 vertically reciprocatable by means of hydraulic rams 30. Each needle 18 has a forked upper end to provide two legs 18A, 18B each of which rotatably supports a pulley 23A, or 23B to guide a baling wire 15 three of which extend individually from a supply 16, over a pulley 24, mounted on the base of the case 11, over the pulleys 18A, 18B of the corresponding needle 18, and through openings 17 in the base of the case to extend along the interior of the latter. Three top wires 25 are also provided from a supply 26 the individual wires of which pass through openings 22 in the top of the case 11 and pass along the inside thereof. Three intercepting rollers 27, 27<SP>1</SP>, 27 are located above each upper opening 22. When the plunger 12 is in its forwardmost position, behind a bale just completed, a set of grooves 23 in the plunger 12 register with the openings 17, 22 whereupon the needles 18 are raised to extend the bottom wires 15 into loops between the rearward lower edge of the new bale and the pulleys 24. Each needle then passes through the spaces between the corresponding intercepting members 27, 27<SP>1</SP>, 27 to carry the top wires 25 with the bottom wires 15 and form two double-wire loops 35A, 35B which are enshrouded by tubes 34 around the associated pair of twister spindles 31 of the twisters 28 as the latter are subsequently lowered. The needles 18 are lowered and the pairs of twisters 28, 28 are then rotated so that the hooks 33 at the ends of the spindles 31 twist the loops 35A, 35B into knots, the tubes 34 of each pair of twisters 28 being pivoted at 34<SP>1</SP> and urged together by springs 3411 so that the tubes 34 may yield should material from the bale be drawn up into them. When the knots have been formed the twisters 28 are rotated for about one revolution in the opposite direction to disengage from the knots, the twisters then being retracted upwards. Each intermediate intercepting member 27<SP>1</SP> comprises bearing blocks (40, 40) for a rotatable shaft (39) around which the wires 15, 28 pass, the blocks (40, 40) being of sufficient axial length to allow them to be displaced towards each other and allow a cutting edge (42) on one block (40) to engage an anvil (43) on the other block (40). A double-acting hydraulic ram (44) is actuated to operate levers (46), Fig. 9 (not shown), move the bearing blocks (40) together and cut the wires 15, 25 beneath the shaft (39) thereby separating the bound bale from that subsequently baled.