Patent GB-1158558-A (GB)
Title: Machine for Closing and Sealing Cartons
Inventor: ALEXON CARL INGEMAR
IPC: B65B7/26
Filed: 1966-12-13
Abstract: 1,158,558. Closing cartons; endless conveyers. ALEXON-PAC A.B. 13 Dec., 1966, No. 55670/66. Headings B8A and B8C. A machine for closing and sealing a carton Fig. 1, advances the carton initially with its side wall 5 parallel to a feed path, folds in the marginal flaps 11, 12 attached to the side walls 3, 4, folds down the lid 2, the flap 7 of which is folded up whilst adhesive is applied to the region between it and the side wall 3, over which the flap 7 is then secured, whereupon the carton advances with its side walls 4 parallel to the feed path to enable the side flaps 6 of the lid 2 to be folded up whilst adhesive is applied to the regions between them and the side walls 4, over which the flaps 6 are subsequently secured. The leading carton in a row is fed forward alternately from two rows of cartons. Fig. 2, by a cam operated feeder dog (68) (Fig. 3, not shown). The carton is thereby conveyed between lateral guides 20 on to lower guide bars 106, Fig. 4, arranged between conveyer chains 98 and below upper guide bars 116 whereupon a curved plate 26 fixed to an arm 24 is cammed forward against the movement of the carton to fold in the marginal flap 12 on the leading wall 4, the flap 12 on the trailing wall 4 being folded in on the return swing of the plate 26. The flap 11 on the side wall 3 and the lid 2 are folded in by ploughs 30 and 28 respectively, after which the flap 7 on the lid 2 is turned vertically upwards by a plough 34. After the carton has passed a glue applicator roll 36, the flap 7 is turned down by a plough 40 and secured to the side wall 3 by pressure rolls 42 and backing rolls 44. The side walls 3 and 5 of the carton are subsequently gripped by resilient grippers (160), (Fig. 9, not shown) attached to the arms of a U-shaped clip 140, Fig. 7, each of which is, pivotally mounted on a carriage (144) secured to an endless chain 142 and provided with rollers (146) running in rails (148) in the machine frame. The carton is gripped by the clip 140 as the chain 142 passes over a sprocket wheel 150 after which the clip 140 is rotated through 90 degrees by guide rollers (162, 164) attached to the clip running in cam paths 166, 168. The clip chain 142 is directed downwardly causing the clip 140 to transfer the carton to conveyer chains 170, being guided between lower and upper guide bars 172, 174 to cause the carton to be conveyed past ploughs 46, which vertically turn up the flaps 6 on the lid 2. After glue has been applied by rolls 48, the flaps 6 are folded down by ploughs 50 and secured to the side walls 4 by pressure rolls 52. By passing the chain 142 over a plate 192, the clips 140 are rotated through 90 degrees again to receive a further carton from the conveyer chains 98. To deal with cartons of different sizes, the lateral guides 20a are adjustable and the upper guide bars 116 are mounted together with the folding mechanisms 26-40 in a vertically adjustable frame 118 which is supported at both ends by toggle levers 124, 126 connected to each other through horizontal coupling rods 128. The upper guide bars 174 associated with the folding mechanism 46-52 are movable along spaced apart transverse spindles 194, 200 to compensate for width variations, both spindles having their ends connected to toggle levers 204, 206 connected by coupling rods 208 and by coupling rods 210 with the toggle levers 124, 126, the vertical adjustment of which automatically results in a corresponding adjustment of the guide bars 174.