GB312156A - Improvements in and relating to wrapping machines - Google Patents

Abstract

312,156. Package Machinery Co., (Assignees of Smith, E. L., and Fuller, F. B.). May 21, 1928, [Convention date]. Packeting by wrapping-up. -In a wrapping machine, the movements of various parts of the mechanism are co-ordinated and varied in speed so as to effect a saving in time and to increase the output. The articles A are fed by bands 31, Fig. 1, into position beneath a wrapper in guides 65, 66 and resting on supports 67. An elevator, not shown, rises and carries the article to position B. During the ascent, the wrapper is folded to form depending flaps w<1>, w<2>, Fig. 10, by bars 70, 72, and the front and rear vertical sides are embraced by plates 75, 76 on a transporter T, which subsequently moves the articleto the right, Fig. 1. Racks 80, in guides 81, 82, carry fixed side folders. F, and a bottom folder F<1> mounted in slidable relation and normally held in an advanced position by springs 92. While the article is frictionally supported by the plates 75, 76 and the elevator commences to descend, the racks 80 move to the right so that the folder F' slides beneath the article and folds up the flap w'. When the folder is held stationary by a stop 130, Fig. 13, the rack continues to advance and causes the folder F to make the folds 131, Fig. 14. The movement of the transporter is coordinated with that of the elevator so that the lower right-hand edge of the article is carried over a curved surface 71<1> of the supporting plate 71 to wipe the flap w<2> across the corner of the article. The transporter T comprises a longitudinal beam 110, Fig. 1, having depending arms 77 carrying plates 75, 76, 111 - - 113 The plates 75, 76 form a pocket of the same size as the article, and the plates 111 - - 113 engage the article on the left and propel it to the right along the table 71. The ends of the transporter are mounted on studs 115, Figs. 1 and 5, on pinions 116 journaled on levers 117 counterweighted at 117<1>, and adapted to rotate on shafts 118 in drums 119. During the counter-clockwise rotation of the levers, the planetary movement of the pinions 116 causes the pins 115, and consequently the transporter, to describe a path t<2>, t<3>, t<1>, t<4>, Fig. 5, with curved portions s, s<1>. The downward movement t<3> coincides to the upward movement of the elevator, and the curve s compounded with the movement of the elevator carries the article round the curve 71<1>, Fig. 12. During the horizontal movement corresponding to the part t<2>, the packet is moved to successive positions on the table 71, and, during the movement, folders F<2>, Fig. 1, F' turn the flaps 174, 175 down and up respectively. Means are provided to reduce the speed of the transporter while it is rounding the curve s of its path. The right hand shaft 118 is driven by a chain 122 from a shaft 145. A chain 142, Figs. 1 and 6, driven from the main shaft 20, rotates a sprocket 144, and with it a weighted lever 140, upon which a gear 151 is mounted to mesh with a stationary gear 150. A stud 163, eccentrically disposed on the gear 151 describes a path z<1> when the system is rotated, while the axis of the gear 151 describes a circular path y<1>. The stud 163 carries a bracket 162 in which slides a rod 161 fixed to the shaft 145. The result is that the speed of the shaft 145 is less than that of the sprocket 144 while the portion z<4> of the path is described, and this portion of the path is made to coincide with the movement of the transporter round the curve s, Fig. 5. Before the packet is conducted out of the machine by belts 195, Fig. 4, a label L is applied at each end.