Patent GB-385333-A (GB)
Title: Improvements in or relating to machines for applying wrapping materials to canisters
IPC: B65B51/00
Filed: 1931-06-13
Abstract: 385,333. Wrapping-machines. WANDER, Ltd., A., 184, Queen's Gate, and WALL, W. H., 40, Dunster Gardens, Brondesbury, both in London. June 13, 1931, No. 25096/32. Divided on 385,324. [Class 94 (i).] The machine effects the creasing and folding in of the projecting ends of wrappers which have been circumferentially applied to cylindrical articles such as canisters. The preliminary application of the wrapper may have been made in a machine such as is described in Specification 385,324. According to the invention, successively formed overlapping flaps are creased in the outstanding part of the wrapper to facilitate the folding operations. The partially wrapped articles 12 are placed by hand or are fed automatically from the wrapper - applying means into carriers 117, Fig. 2, on endless chains 118, and are presented, following intermittent movements, at stations I .. IX, Figs. 1 and 2, for the various operations. A pair of rails 133 are disposed throughout the machine immediately above the articles, and a presser foot 136 on a vertical spindle 137 descends at each station and holds the article in the carrier while the folding is being effected. At station I, push-rods on levers 156 move inwards to centre the article, and at station II the first folds A, Fig. 4, are made at each end. A vertical slide 166, Figs. 8 and 10, carries a bracket 173 upon which a swinging carrier 174 is mounted to carry levers 175, 176 provided with brass folding pads 177, 178. A compound movement is imparted to the system during the downstroke of the slide 166 to cause the folding pads to engage the projecting parts of the wrapper at a little distance from the ends of the canister, and as they descend they move inwardly and press it against the ends. Simultaneously, the tail ends of the levers 175, 176 are pressed inwards by the engagement of fixed cams 187, 188 upon rollers 185, 186, and the folding pads are spread apart as they descend to make a broad flat fold. At stations III and IV, the edges of the fold just made are creased, and at station IV the first side fold B is also made. These operations are shown in plan in Fig. 14. The first crease is made at station III by a presser 210 and backing plate 209, a plate 204 holding the fold A flat against the end of the canister. At station IV a similar presser 230 and backing plate 229 make the second crease and a folder 237 moves downwardly and inwardly to make the side fold B. At station V, a folder 252, Fig. 1, carries out a similar movement to make the fold C and a presser 256 flattens the edge of the previously formed fold B. At station VI, a folder 273 on a horizontal slide 271 creases the fold C and presses it flat against the end of the canister ready for the operations at station VII, which comprise the flattening of the projecting portions of the wrapper which are to form the fold D. A resiliently mounted presser foot 277, Fig. 19, and a support 276 are brought together as shown to effect the creasing, and the flap is folded up at station VIII by a folder 301, Fig. 23; which, after the folding movement, moves slightly away from the end of the package while members 318, 319 cooperate with supports 326, 327 to flatten the small corner flaps E, Fig. 4, at the lower part of the ends. During this operation the upper part of the end is held by members 296. At station IX, the four small flaps E are turned in by folders 352, 353, mounted on slides 346, 347 and fingers 363, 364, while the flaps in the centre of the ends are smoothed by a sliding member 377. The ends are flattened by sliding plungers 385 at station X. The plunger contacting with the top of the canister is faced with rubber, and the opposite plunger is shaped to enter the depression at the base and to force the folds therein. A modified form of folding and creasing apparatus for performing the operations of stations III .. VI is described with reference to Fig. 30 (not shown). The completed packet is removed from the carrier by a paddle 395 co-operating with a guide 400.