Patent GB-385324-A (GB)
Title: Improvements in or relating to machines for applying wrapping materials to canisters
IPC: B65B11/56
Filed: 1931-06-13
Abstract: 385,324. Wrapping-machines ; feeding sheets. WANDER, Ltd., A., 184, Queen's Gate, and WALL, W. H., 40, Dunster Gardens, Brondesbury, both in London. June 13, 1931, No. 17230. [Class 94 (i).] The machine wraps cylindrical canisters by encircling them in a wrapper between which and the canister a pamphlet or card may be inserted. The end folding may be carried out by means described in Specification 385,333. According to the invention, the wrapper pile is progressively raised by positive action feed mechanism operating in time with the means for rolling the canisters over the pile. Applying wrappers. The canisters 12, Fig. 1, gravitate down a supply shoot 14 towards pivoted stops 15, 16, which release one at a time. The foremost canister rolls upon rails 11, Figs. 1 and 3, beneath a friction belt 20, which moves it over a pair of adhesive applying rolls 21. The belt is pressed downwards by adjustable spring pressure rollers 24, 25 to ensure proper engagement. The canister next passes down a slope 28 and arrives above a pile 26 of wrappers in an open-topped magazine 27. The adhesive causes the top wrapper to be picked up and disposed around the canister, carrying with it a pamphlet 29. The length of the wrapper slightly exceeds the circumference of the canister, and the last portion to be applied is provided with adhesive by an endless band 66, Figs. 3 and 6, passing through an adhesive tank 67 and over the margin of the wrapper. When the canister is in the position shown in Fig. 6, with the wrapper almost completely wrapped round it, it passes over a bar 68 and draws the trailing end of the wrapper from beneath the band 66, and almost immediately after presses the band down upon the next wrapper to ensure the application of adhesive. The canister now passes along a smooth table 69 towards a conveyer 93 which delivers it to the end-folding means. Feeding wrappers. In order to ensure that the top of the pile 26 of wrappers is kept at the proper level, the base 72 of the magazine is raised by the mechanism shown in Fig. 8. A vertical rack 76 on the base is engaged by a small pinion 77 associated with a gear 78. The gear 78 is moved by similar gearing 79, 80, 81, and the pinion 81 is fixed to and rotated by a ratchet wheel 82 operated by a pawl 84 on a lever 83 connected with a lever on a rocking shaft 75. The shaft 75 is operated from the shaft 74, Fig. 3, by a spring link 53. A second pawl 85, weighted at 86, prevents reverse movement of the ratchet wheel. When it is desired to set the magazine by hand, the weight 86 is lifted, disengaging the pawl 85, an attached finger 92 also disengaging the pawl 84. The base 72 is now under the influence of a weight 90, Fig. 1, attached by a cord 91 to a rack 87, and adjustments can be made by a hand-wheel 88 geared to the rack by a pinion 89. Feeding enclosures. The enclosures 29, Fig. 3, are separated by a suction device from the bottom of a pile 30 in a magazine 31 and are seized by reciprocatory jaws 34, 35, Fig. 4. The jaws are held open, when in the position shown in broken lines, by the engagement of a knife-edge 43 on a finger 40 with a recess 44 in the tail-piece 37 of the upper jaw 35. The device is moved to the right by a plunger 32 until the finger 40 is depressed by a trip 46 and allows the jaws to close upon the enclosure 29 under the influence of a spring 38. On the return movement, the jaws are reset in their open position by the action of a roller 47 on an extension 41 of the finger 40. Disengagement of the enclosure at the correct place is ensured by vertical abutment fingers 48, 49, reciprocating between the two positions shown in Fig. 3. The partially wrapped articles are now placed by hand or are fed automatically from the conveyer 93 into end-folding means.