Patent GB-981603-A (GB)
Title: Improvements in or relating to a machine for wrapping block-shaped articles
IPC: B65B11/12
Filed: 1960-11-08
Abstract: 981,603. Wrapping-machines. C. T. HALL, W. C. H. BRIDGER, and MOLINS ORGANISATION Ltd. Nov. 6, 1961 [Nov. 8, 1960], No. 38346/60. Heading B8C. An article P 1 , Fig. 3, such as a package of cigarettes which has been partially wrapped, is supported on a horizontal machine surface 1 with its end folds F 1 -F 4  extending as shown. The article, with its end tucks (not shown), is located by fixed rails 2, 3 and two folders 6, 7 are moved vertically up and down to crease the portions F 1  and F 3  preparatory to folding. The article is then moved on one stage and brought to rest, so that fingers 8, 9, Fig. 5, having capillary feed wicks 10, 11 may be moved in and out to apply adhesive to the wrapper. The folders 6, 7 then move up and down again so that their cranked portions 6a, 7a can fold and stick F 1  and F 3  against the tucks. In a further stage, Fig. 7, the article is held by guides 22, 23 and fingers 14, 15 move in and out to apply adhesive to the folds F 2 ; F 4 . A plunger 18 is then operated to push the article up past stationary folders 20, 21 which stick down the portions F 2 , F 4 , and the article is pushed past two spring pressed pawls 26, 27 into the bottom of a vertical stacker 24, 25. In the packaging mechanism of Figs. 9, 10 progressive positions of successive articles are marked P 1 -P 8 . In the P 1  position the folders 6, 7 are moved in a vertical plane by a common arm 32 actuated by a rod 33 provided with two bosses 34, 35 connected with a link 37 pivoted at 38 and a bell crank lever 40 pivoted at 41. The other arm 42 of the bell crank carries a retaining spring 44 and a roller 43 engaging a cam 46 on a shaft 47. When the article is forwarded by means not shown to the P 2  position, extensions 12, 13, Fig. 5 of the guide rails 2, 3 locate the article, while the fingers 8, 9 apply adhesive as already described. A shaft 48 drives the shaft 47 through gearing and mounts a cam 49 on which a roller 50 rides. The roller 50 is carried on a bracket 53 bolted on to one arm 54 of a bell crank pivoted at 55, and this bell crank is connected by a pin 58 and slot 57 to a similar bell crank 59, 61 pivoted at 60. When the cam roller 50 moves over the cam 49, bosses 62, 63 reciprocate blocks 66, 67 and the fingers 8, 9 by means of rollers 68, 69 on the blocks which engage grooves 70, 71 in the frame of the apparatus. In the next, or P 3  position, the fingers 14, 15, which are fixed to blocks 72, 73 pinned to the tops of the arms 61, 54, are operated to apply adhesive to an article located one position further on. The plunger 18 is attached for vertical movement to a push rod 19 which is pivotally connected to links 76, 78 pivoted at 77, 79, the motion of the rod being obtained from a roller 80 which moves over a cam 81 under the action of a retaining spring (not shown). The adhesive applying fingers have wicks at their ends which are fed by capillary action from adhesive pots 82, 83, 85, 86. During the time an article occupies any of the three positions P 4 , P 5 , P 6  within the stacker, heaters 89, 90 and 91 may be brought into contact with a longitudinal seam S, Fig. 1 (not shown) of the wrapper. The heater 89 is swung into and out of position by linkage 93, 95, 96, and a rocker arm 97 operated by a roller 99 and a cam 100 keyed to the shaft 47, and the heaters 90, 91 are fixed to brackets 104, 105 which are attached to arms 106, 107 pivoted at 108, 109, and are pin and slot connected at 110, 111. An extension arm 112 having a roller 113 engaging a cam 114 moves the heaters 90, 91 towards or away from the wrapped article as required. The article is finally ejected on to a platform 123 by a plunger 115 connected by links 116, 118 operated by a cam 122 also on the shaft 47.