Patent GB-197457-A (GB)
Title: Improvements in apparatus for manufacturing cups of paper or like material
Filed: 1922-03-03
Abstract: 197.457. Shields. T., (Burt Co., Ltd.. F. N.). March 3, 1922. Paper bags, making. - In machines for making conical cups of paraffin coated or other paper or the like from prepared blanks, the blank magazine is arranged to present a pack of blanks simultaneously over pneumatic gripper openings in a conical former and a blanksupporting plate. The machine shown is of the turret type with four stations. At station A, the above operation is performed, a part 4<1> of the blank 2<1>, Fig. 30, also contacting with a glueing-plate which assists to withdraw it from the magazine. The turret then turns to station B, the blank passing under a presser plate in its path and being partly wound on the former, which receives two rotations at the station, with the blank still in contact with the plate, to complete the winding process. Stiff ironing-brushes encircle the path of the former from station B to beyond station C. At station D the blanks are stripped from the formers and subsequently delivered from the machine in packs containing a predetermined number of blanks. The clutch-controlled main shaft 14, Fig. 2, drives intermittently through Geneva stop mechanism 22, 23 a shaft 21 carrying on a turret head 27 pins 29 on which are loosely arranged conical formers 1, Figs. 4 and 13. An exhaust pump 25 is driven by gearing 26. At station A a pack of blanks 2<1> is held suspended by toes 66 on spring arms 65, Figs. 4 and 7, carried by a framing 60, 61 pivoted by hinges 64 on a frame 45, 49, Fig 2, which is carried bv vertical rods 46, 50, raised and lowered by gearing and linkwork 52, 56, 57 &c. driven from a shaft 18 itself driven by the shaft 14, so as to bring the lowermost blank 2<1> into contact with a stationary plate 3 and a movable glueing-plate 4 arranged tangential to the former at station A. The glueing-plate 4 is carried on a camcontrolled lever 81 and is lowered periodically in order that a glueing-roller 96, Fig. 2, which reciprocates across rotatable rollers 111, 112, 113 in a glue-pot 110, may pass across the plate and apply glue thereto. The formers 1 have perforations 38 communicating through passages 36 with a valve plate 32 automatically controlled and connected to the pump 25, and the plate 3 has perforations 68 also connected to the pump by piping 70 and an automatically controlled valve 71. When the pack of blanks 2<1> is lowered against the former 1 and plates 3, 4, the valves are opened and the lowermost blank is gripped. The plate 4 is first lowered slightly to separate one end of the blank from the pack and the pack then rises without its lowermost member, initial movement normal to the plates being secured bv a link 361 turning on a stationary pivot 362 and pivoted to a bar 360 secured to the framing 60, 61. A plate 5, Fig. 2, is next lowered to press the glued edge of the blank on the glueing- plate 4, and when the plate 4 is lowered and the pneumatic grip of the plate 3 is released the shaft 21 turns to move the former to station B, the blank passing under a plate 6, Fig. 13, with spring tongues, the plate being secured with slight lost motion on a stationary arm 125<1>. Spring mounted pawls 128, Fig. 17, are adapted to engage toothed wheels 127 on the formers 1, so that the formers are locked on their spindles and during their movement from station A to station. B the blank is partly wound on its former by the action of the plate 6. The shaft 18 driven from the shaft 14 carries a cam 136, Fig. 17, arranged to engage an arm 134, which turns on a stationary pivot 133 and through a link 131 rocks a loose arm 130 to move a gear-wheel 138 carried thereon into gear with the wheel 127 at the moment the former arrives at the station B. At the same time, a roller 145 on the arm 130 disengages the pawl 128, and the former 1 is rotated through two revolutions by intermittent gearing (not wholly shown) from the shaft 18. This rotation completes the rolling of the blank on the former. Stiff iron-brushes (not shown) on circle the path of the former from station B to beyond the pause at station C, during this movement the former 1 being again locked to its spindle. At station D, the pneumatic grip on the blank is released, holes 39 through the hollow parts of the formers 1 assisting this action, and a pneumatic stripper 8, Figs. 2 and 25, which is carried by a cam-operated oscillating arm 157, is advanced axially of the former to contact with the loose blank. The suction on the stripper 8 is controlled by a valve 150 with an arm 151 which is moved for suction and release, respectively, by a cam-operated swinging arm and a fixed stop as the stripper reciprocates. A tapper 9 follows the movement of the stripper away from the former, and when the suction on the stripper is released, knocks the finished cup on to a pivoted tray 10, preferably against a stop or positioning piece. The discharge of stacked cups on to the tray 10 continues until a predetermined number has accumulated, when the trav is tilted and the stack leaves the machine. to accomplish this, a piston 154 provided with a depending arm 156 is arranged in a cylinder in the side of the gripper 8 and is obtruded and withdrawn alternately by a spring and by the gripper suction means respectively. The arm 156 thus, during the movement of the gripper, intermittently strikes an arm 206, Fig. 24, on a shaft 196 carry. ing a crank-pin 199 producing the reciprocation of a pawl 203 engaging a ratchet-wheel 201 provided with a stud 202, Figs. 23 and 24, which ultimately passes beneath the end of a floating lever 211 pivoted at its other end 212 to a sliding pin 207 and connected at its centre to a cam-oscillated lever 214. Normally the oscillation of the lever 214 rocks the lever 211 on the pivot 212 as a fulcrum, but when the stud 202 moves beneath the lever, the pin 207 descends and releases a disc 194, which is spring pressed into frictional engagement with a constantly driven disc and is thus rotated and through link-work connections, rocks the tray 10 to remove the stack of blanks therefrom.