GB600377A - Improvements in wrapping machinery - Google Patents

Abstract

600,377. Wrapping-machinery. ROSE, A. G., GILBERT, J. A., and ROSE BROS. (GAINSBOROUGH), Ltd. Oct. 4, 1945, No. 25818. [Class 94(i)] A method of forming packages comprises folding a wrapper of paper, foil, film or other material in the form of a U about the bottom and two opposed sides of an article, with the upstanding portions of the wrapper parallel to the direction of travel of the article, pressing the upstanding portions together to form a longitudinal seam, which is then sealed and folded on to the article, turning the partially wrapped article through 90 degrees so that its ends lie parallel to its direction of travel, and collapsing and sealing end portions of the tube extending from the ends of the article to form lateral seams. Articles 11, Figs. 3 and 4, (Fig. 4 is a continuation of Fig. 3 to the right), are fed in succession to a series of open-ended pockets 12, a succession of heatscalable wrappers 14 being fed across the path of the articles so that each article carries with it into the pocket a wrapper which is thus folded in U-form about the article. Each pocket 12 is mounted for movement about a vertical axis on a guide block attached to a conveyer chain which is driven intermittently and carries each pocket in turn to a series of operating stations. Freely mounted on the base of each pocket is a pair of rollers 19, 21, the roller 19 engaging stationary guides 22. Each article is carried from the feeding station A to an intermediate station and thence to a first folding station B, the upstanding portions of the wrapper being brought together during the latter movement by a pair of folding members 26 into contact with a stationary web 27, forming a longitudinal seam. The article is then carried to a sealing station where the seam is sealed by pairs of heated rollers 28. The article is then brought to a turning station C, the roller 19 moving out of the guides 22 and the roller 21 engaging a fixed guide 29, rotating the pocket through 90 degrees and entering the guides 23. As the article leaves the turning station, the longitudinal seam is folded over the article by a stationary folder 31, and at a second folding station D pairs of spreader fingers 32 collapse the walls of the ends of the wrapper tube to form end seams which are completed by pairs of rotary folders 33 pivoting about the ends of the package in arcuate tracks 36. The seams are sealed by two sets of heated rollers 39, and at a delivery station E, lifting members 41 eject the article into a stacker disposed above the conveyer chassis, members associated with the stacker folding the end seams and tabs extending from the end of the package over on to the package. At a second turning station, the pockets are rotated into their usual position, and returned by the chains to the feeding station.