GB1037692A - Packaging machine - Google Patents

Abstract

1,037,692. Packaging machine. MEAD CORPORATION. Feb. 21, 1963 [March 1, 1962], No. 7049/63. Heading B8C. A mechanism for tightening a wrap-around blank about a group of articles, the blank consisting of panels for covering the top and sides of the group and overlapping beneath it, comprises a tightening element for entering an aperture in one overlapping panel and drawing it towards the other, the element being controlled by a pair of spaced movable support elements interconnected with it and a thrust linkage connected with each of the support elements, each of said linkages being arranged to impart movement to its associated support element which is in a different direction to the direction of movement imparted to the other support element, whereby controlled resultant movement is imparted to the tightening element. As described, the elements are duplicated, drawing each overlapping panel towards the other. Carton blanks, Fig. 2, are deposited intermittently from a hopper on to the top of the articles to be packaged, said articles being fed intermittently along a conveyer, the sides of the blank being folded down and the panels D, E being folded under as described in Specification 1,037,691. The apertures H in the lap panels D, E are engaged by the tightening elements 32 each longitudinally adjustable on a crosshead 59 and are controlled by support elements 33, 34 which are connected as shown in Fig. 6 to cranks 45, 55 pivoted about a fixed pivot 46 by cams 48 and 56 on a shaft 31 driven by a motor through a drive shaft of the type to accommodate longitudinal adjustment. The element 33 imparts left to right movement and the element 34 imparts vertical movement, the amount of movement being adjustable by slotted connections 43, 44, 53, 54. The mechanism is in duplicate, one for each pair of elements 32 and the two mechanisms are adjustable towards and away from each other for different package sizes. The mechanism for effecting a locking of the tabs F into the openings G comprises a bar 60 with locking fingers 60 which engage the tabs F 1 , F 2 and F 3 and drive these tabs through the apertures defined by tabs G 1 , G 2 and G 3 . The bar 60 is connected to an arm 64 which is operated by links 66, 68, 74 from a cam 80 on a shaft 81 which also carries tightening element cams 82, 83.