Patent GB-593368-A (GB)
Title: Improvements in wrapping machinery
IPC: B65B25/00
Filed: 1945-02-27
Abstract: 593,368. Wrapping-machines. ROSE, A. G., GILBERT, J. A., and ROSE BROS. (GAINSBOROUGH), Ltd. Feb. 27, 1945, No. 2194. [Class 94 (i)] In a wrapping-machine of the kind in which the articles to be wrapped are fed in succession to a series of pockets previously each provided with a wrapping and contained in a movable pocket member adapted to carry the articles in turn to a series of stations at each of which an operation is performed, the wrapped articles are delivered by an ejector which passes up through each pocket and ejects the package into a magazine, a stop mechanism being provided, actuated upon the detection of failure in feeding an article to a pocket, to arrest the operation of the ejector when the faulty package arrives at the delivery station. In a machine according to the invention for wrapping razor blades 38, Fig. 1, a member 11, Figs. 1, 2, and 4, with eight pockets 12 is rotated intermittently so as to bring each pocket in turn to each of eight operating stations. At the first station 17, an outer wrapper blank 14 which is withdrawn from a magazine 16 by a suction device 18 is deposited over a pocket and positioned by four pins 22. At the second station 24, a gumming arm 28 transfers a spot of gum from a gumming wheel 27 to one of the flaps of the wrapper. At the third station 29, an inner wrapper is cut from a web and positioned on the wrapper 14, a pressing device 34 then pressing the liner and wrapper into the pocket, leaving the flaps upstanding. At the fourth station 37, a blade 38 is fed from the bottom of a magazine 39, by a pusher 41 actuated by lever mechanism from a cam shaft 47. The blade 38 is transferred from the pusher to the wrapper by a suction nozzle 51 mounted on a carriage 52 reciprocable on rods 53 secured to a carriage 64 reciprocable on rods 66, the movements of the carriages 52, 64 being effected by cams on the shaft 47. Suction is applied to the nozzle 51 by a piston 76 actuated from the shaft 47. A cylinder 82 is ,connected in the air line between the nozzle 51 and the piston 76 and contains a piston 83, whose rod 84 normally holds closed a pair of electrical contacts. Each time the nozzle 51 is closed by a blade, the piston 83 is actuated to break the electric circuit of a solenoid 127, at the delivery station. At the fifth station 91, the various flaps of the liner and wrapper are folded in succession by folding members 92, 93, 94, the last flap being folded by a stationary member 97 while passing on to the sixth station 96, where the completed package is pressed by a descending member 98. At the delivery station 101, the package is ejected upwards into a magazine 103 by a vertically movable ejector 102 operated through a link 106 by a two-armed lever 107, 108 pivoted at 109 and oscillated by a cam roller 111 and a cam 112 on a shaft 113, a third arm 114 of the lever operating the arm 117 of a counting device 118. A stop mechanism for arresting the movement of the lever 107, 108 when the suction nozzle 61 fails to act comprises an intermittently rotatable disc 123 carrying a number of slidable pegs 124, and a pivoted cam member 126 normally held by the solenoid 127 in the path of the pegs 124. If the nozzle 51 fails to pick up a blade, the solenoid remains operative, and, on the next movement of the disc 123, a peg 124 is depressed, and, on further movement of the disc 123, the depressed peg engages the arm 122 of a two-armed lever 121, 122, causing the arm 121 to engage a projection 137 on the arm 108 and prevent the oscillation of the lever 107, 108, so that the ejector 102 does not operate, the mechanism being arranged so that the suspension of its operation occurs when the faulty package is in the delivery position. At the eighth station 143, an auxiliary ejector 146, independent of the stop mechanism, by similar action ejects any package remaining in the pocket 12 up into an auxiliary magazine 144, the pocket continuing into its position for the first station, to repeat the cycle.