Patent GB-477331-A (GB)
Title: Improvements in and relating to machines for the manufacture of cartons
IPC: B31B17/00
Filed: 1936-06-24
Abstract: 477,331. Cartons. BUTLER, W. J., and CAMPBELL CONVEYORS, Ltd. June 24, 1936, No. 17511. [Class 18] Circular, elliptical, square, rectangular, &c. cartons, for milk &c., of single or multiple thickness and of cylindrical, converging or diverging shape, are made from paper, cardboard, &c. sheet and/or strip by first forming a tubular member and then inserting one or more flanged or other base members, removing the cartons, e.g. by a conveyer and then, if desired, waxing and drying the cartons. The machine described consists of a table 1, Fig. 1, rotated intermittently by twelve pins 4, Fig. 2, depending from a disc 3 keyed on the axle 2 of table 1 impelled forward by a cam 5 on a shaft 6 which, with shafts 9, 10 are driven by a motor 7 which is the prime mover. The table 1 carries twelve hollow receptacles 8 and, fixed radially about the table are five mechanisms A, B, C, D, E, of which A forms tubes from shaped sheets, B produces other tubes adapted to be inserted within the tubes formed by mechanism A, C produces flanged disc base members from a roll c and inserts them in one end of the composite tube, D secures the base in the tube, and E produces a second flanged disc base from a roll e and inserts and secures it in the composite tube. Take-up spools (not shown) for scrap strip material may be provided. Tube forming and removing. Mechanism A is that described in Specification 464,869. It embodies a shaft 11, Fig. 3, actuated by a chain 12 from shaft 9 to fold a sheet of paper from a pile 13 round a table-like mandrel 14, Fig. 4, the overlapping edges being acted on by a punch 15 to form tongues on one thickness which are pressed through apertures in the other thickness, the two thicknesses being given relative movement to engage the tongues positively. The tube is drawn off mandrel 14 and the relative movement given to the two thicknesses by a mechanism F, Fig. 1, comprising a link 21 oscillated from a cam 16 through the train 17, 18, 19, 20, and actuating a slide 23, Fig. 11, moving on a bar 24 on a bracket on column 2 and carrying grippers 26, 27 of which arm 26 is fixed and arm 27 pivoted at 28 to member 23. Arm 27 is oscillated to effect the grip by a boss 30 which fits rotatably in it and is carried by an arm 29 pivoted at 31 to the slide 23 so that oscillation of arm 29 relative to the slide 23 opens and closes the grippers. Arm 29 is oscillated by the to-andfro movement of link 21 through lever 33 pivoted about boss 30 and a pawl 34 adapted to engage the upper end of lever 29. Pins 35, 36 limit the oscillation. Movement to the left in Fig. 11 of link 21 brings lever 33 against pin 35 so that member 23 thereafter slides on bar 24. The grippers pass within a receptacle 8 and come to rest embracing the end -of one of the overlapping edges of the tubular member 22 on mandrel 14. The beginning of the return movement of link 21 oscillates lever 3 and engages pawl 34 with lever 29 and thus rocks it about its pivot 31, causing the gripper to close. Continued movement of link 21 moves slide 23 along rod 24 and draws the tube 22 from mandrel 14 and inserts it into receptacle 8, the relative movement of the overlapping edges of tube 22 is effected as described in Specification 466,928, [Group VIII]. The grippers are released by contact of an arm 34<1> on pawl 34 with a plate 38. Receptacle 8, which is carried by table 1, comprises a hollow body 39, Fig. 13, fixed to the table and carrying a rotatable liner 40 with taper bore corresponding to tube 22, but enlarged at 41. Rotation of the table 1 through one step rotates the liner 40 through 180‹ by engagement of a fixed rack with a toothed wheel 42 carried by the liner, a spring-pressed ball 45 locking it against accidental displacement. A similar tube 22 is formed at station B and, when drawn into the first tubular member 22 has its overlapped edges diametrically opposite those of the other, as shown in Fig. 16. The interior of the composite tube may be arranged to be entirely free from inwardly projecting parts. The shape of the end may be consolidated on the end expanded by a conical or expanding mandrel at a position intermediate between mechanisms B and C. Making and securing bottoms. Strip c<1>, Fig. 20, is fed from a roll c, Fig. 1, between a ring die 58 and a cutting punch 56, carried on a slide 54 actuated by a rod 53, Fig. 17, from an eccentric 51 on shaft 49 driven by chain 50 from shaft 10. Movement of a yielding ring 61 permits the disc to be flanged, and on the return of the slide 54 a plunger 65 ejects the disc which descends a shoot 66 to the device shown in Fig. 22 which is actuated from slide 54 by a lever 72 to reciprocate rod 70 which actuates an expansible mandrel 77 and pivoted segments 81 to insert and secure the bottom. The bottom is further secured by the mechanism D which comprises a casing 93, Figs. 25 and 30, containing a sliding rod 96 actuated by links 92, 91, 89, 88 from a cam 86 on shaft 10 and carrying a plunger head 98 which actuates pivotal segments 102, controlled by elastic rings 103, to turn in the ends of the composite tube 47 and itself presses the folded-over flange thus formed inwards within the end of the body. Correct positioning of the receptacles 8 is ensured by engagement of a plunger 107, Fig. 25, with a recess 106 on one of the receptacles, the plunger being actuated from rod 92. A stop plate 109 engages the outer end of tube 47 during the movement of plunger 98, being moved by a bar 110 on rod 91 which contacts a spring bolt 111. Mechanism E produces a further flanged disc from a paper roll e, inserts it and secures it, the mechanism being similar to mechanism C, the reference numerals in Fig. 32 which indicate corresponding parts differing only by a 0 at the end. The cartons are ejected by a plunger 120, Figs. 1 and 38, actuated by a link 121, Fig. 17. The expansible mandrels 77 may be replaced by the two-part expansible mandrel shown in Fig. 39, which provides a continuous outer surface for the mandrel head in the expanded position, an inner sleeve 123 having a slotted end which is expanded by a rod 130 within the slotted end of an outer sleeve 124. An alternate form of the machine is shown in Fig. 44 where mechanisms A<1>-E<1> corresponding to mechanisms A-E are arranged alongside a conveyer 134 which carries receptacles 135 corresponding to receptacles 8. In a further alternative, the mechanism A-E are moved to build up a carton or cartons at a particular point or points.