Patent GB-1467429-A (GB)
Title: Method and apparatus for producing a container
IPC: B31B50/32
Filed: 1973-09-05
Abstract: 1467429 Making flip top cartons A SCHMERUND 6 Aug 1974 [5 Sept 1973] 41744/73 Heading B5D [Also in Division B8] In a method of making a flip top carton, the lid and main body forming portions of the blank are folded back-to-back about a fold line g between the lid and main body portions prior to the lid and main body portions being folded around a mandrel to complete the carton. The carton blank assembly.-The carton is erected from a blank assembly comprising a main blank, such as shown in Fig. 1, and an insert blank (II), Fig. 4 (not shown). An alternative main blank, Fig. 29 (not shown), is similar to that shown in Fig. 1 but comprises additional lateral portions (a 10 , b 10 ) hinged to lateral portions a 4 , b 4  and only seven central portions (c 1 -c 7 ). Forming the carton.-In the operation of a machine for producing the cartons, main blanks are alternately withdrawn by suction grippers 240 from two magazines, and fed past an adhesive applicator roller 216. The adhesively coated blank is engaged by a gripper cylinder 214 and drawn past a stationary guide segment 224 which folds central portions c 7  or c 7  and c 8  back on to the central portions c 6  or c 6  and c 5 , Figs. 3 and 4 (not shown). The main blank is then combined with an insert blank, Fig. 5 (not shown), which has been stamped out from a cardboard strip 268a or 268b, upon passage of the blanks between the cylinder 214 and a roller 211. Lateral portions a 3 , a 2 , b 3 , b 2 , and (a 9 , b 9 ), Fig. 4 (not shown), of the blank assembly are next folded down, Figs. 6 and 7 (not shown), by rotating segments 267 as the assembly is fed into engagement with a pivotable folding lever 117 which pivots upwardly to fold the blank about the fold line g, Figs. 8 to 10 (not shown), the main body portion being held down by a reciprocal slide member 116 positioned adjacent the fold line g. The thus folded blank is fed by the slide member 116 to a mandrel, e.g. 101, on a revolver, indexed at station I. A recess (101c), Fig. 38 (not shown) is provided in each mandrel between a main portion of the mandrel about which the main body is folded and a projecting portion 101a about which the lid is folded. The slide member 116 inserts those parts of the blank adjacent the fold line g into the recess (101c) where they are held by a gripper 113 extending through an aperture 101b in the projecting mandrel portion 101a. The main body portion is folded around the mandrel by lateral folders 115 which fold in the lateral portions a 2 , b 2 , Figs. 11 and 12 (not shown), a downwardly movable folder 114 which folds portions c 1 , c 2 , (c 9 ), a 1 , b 1 , (a 9  and b 9 ) downwardly through 90 degrees, Figs. 13 and 14 (not shown), a rotatable folder 122 which, during movement of the mandrel from station I to station II, folds up the portions c 1 , (c 9 ), a 1 , b 1 , (a 9  and b 9 ), Figs. 15 to 17 (not shown), and stationary guides 120 which guide and fold the lateral portions a 1  and b 1 , Figs. 18 and 19 (not shown). The lid is folded around the projecting mandrel portion at stations III and IV by lateral sliders which fold in lateral portions a 10 , b 10 , Figs. 20 and 21 (not shown), lateral rotary folders 136 which fold portions a 6 , b 6 , c 6 , c 7  and c 8  (if present), Figs. 22 to 25 (not shown), and lateral levers which are pivotal and also movable towards one another to fold portions a 6 , b 6  against portions a 4 , b 4 , Figs. 26 and 27 (not shown). A further gripper 121 is provided on each mandrel to clamp portions c 6 , c 7  against the projecting mandrel portion 101a.