Patent GB-242211-A (GB)
Title: Improvements in and relating to package wrapping art
IPC: B65B11/32
Filed: 1924-04-24
Abstract: 242,211. Marks, E. C. R., (Pneumatic Scale Corporation, Ltd.). March 24, 1924. Packeting by wrapping-up.-Relates to a method of machine for applying wrappers to packages, and in which a succession of adhesively-coated wrappers and a succession of packages are separately conveyed to an applying point, after which each packet and associated wrapper is moved along a closed path, at different points in which the wrapping is completed. One pair of end flaps is first folded down at each end of the package while the remaining end flaps are bent back into the plane of the ends of the package, and, according to the invention, the inner coated surfaces of the projecting ends of the wrapper, in such bending, are not subjected to contact with members which would remove any substantial portion of the adhesive, only the outer uncoated surfaces being engaged during creasing and end folding operations. Additional adhesive is applied before the final end folds are made. The package P and wrapper Ware fed from opposite ends of the machine and in different horizontal planes towards each other at the applying station at which the article and wrapper are inserted in pockets in an intermittently rotating spider. A succession of wrappers are fed down an inclined bed, registered longitudinally, then pass a water roller and are directed on to an adhesive-applying roll 23, Fig. 7, by which the wrappers are forwarded to a stripper 100. Each wrapper is guided beneath a plurality of spaced rollers 101, grooved to receive belts 121 and overlying sprocket feed chains. The wrappers are arrested by stops pending the feeding of a package P into position beneath them. The packages P are fed by a conveyer 133, Figs. 4 and 7, from which they are offset by a slide 141 on to a table 140 and raised by an elevator 148 to meet the overlying wrapper W and finally thrust into one of the pockets of a wrapping-spider. On its passage into the pocket the package passes into a guideway comprising channelled guides which rise with the package to ensure proper transfer. Each pocket of the spider comprises a fixed jaw 200 and a movable jaw 201. The movable jaw is pivoted at 202 and is actuated by a rocking arm 205 impinging upon an extension 204 of the jaw. During the insertion of the package and wrapper into the pocket revolving brushes 220, 221 arranged above, the wrapper feed chains turn down the front and back panels P<3>, Fig. 49. The wheels are geared to rotate in unison by sprockets on shafts 224, Fig. 9, and chains 222, 226. The shafts of the brushes are journaled in pivoted arms 232, 233 by means of which the brush 220 is moved as shown to turn in the flap W<1>, Fig. 49. As the spider begins to rotate the opposite flap W<2> is turned down by the brush 221. In the next folding step, the narrow end flaps W<3> are sealed down by two pairs of oppositely-sliding brushes 246, Fig. 17, mounted to slide in inclined slots 247, Fig. 4, in the wrapping head. The brushes are hinged at 248 to their holders and held in position by springs 248<1>, and are operated to approach and recede from each other by bell-crank devers having intermeshing gear segments. The wide end flaps W<4> are meanwhile held out by upper and lower pairs of spreaders comprising spaced fingers 259 on shafts 260, which are universally jointed at 262 to permit adjustment. The diagonal folds which define the ultimate shape of the wide end flaps W<4> are next formed and the contacting faces of the folded portions are united, and the outer uncoated faces of the sealed-down narrow flaps W<3> and the inner faces of the flaps W<4> are exposed for an additional application of adhesive. The latter flaps, as turned outwards by the fingers 259, are folded into the planes of the package ends by pairs of creasers 271, Fig. 28, which cooperate with flap-supporting blades 272. The adhesive is supplied by rolls 292, Fig. 37, which transfer it from rolls 306, 307 to the flaps, which are supported during this movement by rolls 332. The rolls are so shaped as to apply lines of adhesive on the flaps. W<3> at substantially the lines of fold of the flaps W<4>. The flaps W<4> are folded down by brushes 333, Fig. 42, and rolls 334, Fig. 43, moving through the paths shown in broken lines. The package is finally ejected into a trough 336, Fig. 4, the pockets being momentarily opened to allow ejectment.