Patent GB-1459091-A (GB)
Title: Packing machines
IPC: B65B5/02
Filed: 1973-02-16
Abstract: 1459091 Making cartons MOLINS Ltd 14 Feb 1974 [16 Feb 1973] 7858/73 Addition to 1339721 Heading B5D [Also in Division B8] In apparatus (see generally Division B8) in which a packet blank is inserted into a pocket of a rotatable drum FD at a position A, the drum is intermittently rotated to move the pocket to a position D for insertion of an article, and then past folding members to an ejection position H, the blank insertion means at position A performing folding operations on the blank as it is moved into the pocket. Blank reservoir BR and hopper BH, Figs. 1 and 3.-Blanks in the reservoir BR are urged towards the hopper BH by spirally wound springs 8 mounted in drums 7 and connected to a back plate 5. The reservoir is mounted on springs 12 to enable it to be vibrated. In the hopper intermittently driven belts 20, 21 urge the blanks to lips 18, 19. Suction pads 51 driven from cams 60, 61 pull the leading blank from the hopper and against a plate 22. Lugs 32, 33 mounted on a slide 29 driven by crank disc 42 push the blank into the nip of feed belts 66, 67. Blank feed conveyer TC, Figs. 1 and 6A.- The feed belts 66, 67 feed the blanks on to fixed plates (84), 85. Mounted above the plates for reciprocation longitudinally of the plates is a frame 81 carrying driving pawls 102, the hooked fingers of which engage the blanks to move them along the plates. Pawls 90 pivoted to the plates prevent return movement of the blanks. Mounted along the conveyer TC are a photoelectric detector D1 arranged for a correctly positioned blank to block the upstream and not the downstream pair of cells 154, a printing or embossing device 134 having a reciprocable lower part (136, Fig. 6B, not shown), a pivoted roller 158 to detect the pressure of two blanks, a gumming unit (126, Fig. 6C, not shown) having ball valved nozzles which when raised against the blank depress the ball to permit flow of glue, a folding unit FU comprising conveyer bands (120, 121) which feed the blanks faster than the pawls 102 past a plough which folds the end panel P1, Fig. 27, of the blank on to the next panel P14 to stick thereto and past ironing rolls, and a second similar detector D2. In an alternative arrangement (Fig. 33, not shown) adhesive is applied to panel 14 between the blank hopper and feed belts, the plough is positioned along the feed belts, and the pawl arrangement is replaced by upper and lower conveyer belts. Carton forming, Figs. 1, 18A, 27.-At position A the blanks rest against a stop. A central pusher 274 and two side pushers 273, 275 engage panels P17, P4/5, and P10/11 respectively and lift the blank towards the pocket. Tuckers 299, 300, 304, 305 fold the flaps (P3), P6, P9, (P12) at the end of sides P4/5, P10/11 downwardly, and after the side pushers have stopped and as the central pusher continues the sides P4/5, P10/11 are folded downwardly by folders 297, (298), 302, (303). Top and bottom panels P15, P18 are folded as the blank enters the pocket of the drum. Front panels P14 and P19 are folded back to the Fig. 27 position by plates (295, 296, Fig. 20, not shown) on rotatable shafts and held in this position by plates 342 as the drum starts to rotate. As the pocket approaches position F ploughs rotate front panels P14 and P19 through 110 degrees and at position F pivoted folders (345, 346, Fig. 23, not shown) complete the folding of the front panels. At position G hot melt adhesive is applied to flaps P2, P7, P8, and P13. At position H the package is pushed out of the pocket into a stacking unit SU, and resiliently mounted plates (377, 382, Fig. 23, not shown) fold the flaps P2, P7, P8, P13 against the sides of the package. In the unit SU heated blocks (372, 379) resiliently bear against the package sides to melt the adhesive.