Patent GB-516527-A (GB)
Title: Improvements in apparatus for making-up, packing and sealing cartons
IPC: B31B1/74
Filed: 1938-06-03
Abstract: 516,527. Labelling. HARTMANN, C. W., and SATONA, Ltd, June 3 1938, No. 16728. [Class 73] [Also in Group XVII] In a machine for making cartons, the latter in collapsed tubular form are removed from a stack and distended, the lower ends are sealed, the upper ends are preformed, and the cartons then conveyed through a water-proofing stage. The cartons are initially flattened as shown in Fig. 12 and a stack of them is urged forward by a presser-plate running on an endless belt 2, Fig. 7. A reciprocating rod is slid into the foremost carton to hold the back wall thereof against the stack whilst a bar 5 with depending fingers 5b slips behind the carton and then swings forward to distend the carton until its forward edge can be gripped between rollers which draw the carton through and feed it on to a table. Here a pusher plate squeezes the carton against an adjustable stop until it has fully expanded and then a reciprocating finger 15 pushes it on to a former 12 on an intermittently rotated wheel. At the next station a head 18 descends on to the outer (bottom) end of the carton and folding blocks contained in the head slide inwards to fold the ends of the carton "rosette" fashion, and at the next two stations pressers 19, 20 flatten this base. A sealing disc or label is applied to the base at the next station, the label being cut from a roll 21 and applied against the face of a plunger 25 on an intermittently rotated member 26, the label being held on by suction and so compressing a spring which surrounds the plunger. Rotation of the member 26 first brings the label past a paste-applying roller 29 fed from a tank 31 and then brings it to the position 27 opposite a carton where the suction is cut off and the spring forces the label against the folded base of the carton. At the next two stations heated press heads 32, 33 press the label on firmly, the latter one, 33 also indenting the base. Should a former pass the first station without a carton being applied, a roller 130 on a pivoted arm enters a cam slot 12b in one side of the former, and by means of links &c. the label feeding and cutting mechanism is rendered inoperative. The plunger 25 not carrying a label is thus pushed out by its spring and the projecting portion operates a switch to stop the machine. The carton is removed from its former by a reciprocating finger 35 into a holder 36 on an intermittently moving endless belt 16, and at one position on this belt, a head 38 descends over the upper end of the carton and fingers therein swing inwards and bend inwards two opposite sides of the carton to perform the closure: During this operation the other sides of the carton are supported by suction devices 40. When the cartons arrive between the walls 46 of the waterproofing bath, they are pushed off four at a time into supports 43, Fig. 2, carried on a rotating drum by fingers 42 which have a swinging and translatory movement. The holders 43 carry links 48 which ride over a cam surface and actuate devices to cause the holders' to grip the cartons and they also carry'rollers 52 running in tracks which turn the cartons as shown during their movement through the bath 41 and until they reach a position opposite a conveyer 57 where abutments 49a engage the links 48 to release the cartons and fingers 56 move the cartons on to the conveyer. The latter carries transverse rods 58 for moving the cartons between guide rails 59 and over a stationary plate which is provided with heated scrapers 62 for removing surplus wax, a tray 63 for drippings also being provided. The cartons can now be filled and sealed by suitable apparatus 64, 65 or discharged in the empty state on to a conveyer 66.