Patent GB-349963-A (GB)
IPC: B65B5/02
Filed: 1930-02-05
Abstract: 349,963. Wrapping-machines. PACKAGE MACHINERY CO., 132, Birnie Avenue, Springfield, Massachusetts, U.S.A. Feb. 5, 1930, No. 3921. Convention date, Feb. 11, 1929 [Class 94 (i).] Articles are assembled into a stack formation and are wrapped as the assembly progresses. The articles are fed by a band 22, Fig. 4, into contact with which they are pressed by resiliently mounted rollers 31, and travel along a guideway 27 until the foremost article arrives above the position of assembly B and beneath a plunger 40, and presses against an abutment 180. The article or group of articles which is beneath.the plunger 40 is supported by spring-controlled tilting ledges 37. Upon the abutment 180 being pressed, the paper feed, the plungers 40, 41 and the wrapping mechanism are set in motion. Paper is drawn from a roll, severed, and gummed on one edge, and is brought into position in channel guides 119 beneath the foremost article. The paper cutting and feeding mechanisms are actuated from the same oscillating shaft, oppositely disposed pawls and ratchets causing actuation of one mechanism for each direction of rotation. Mounted on each side of the position of assembly B are grooved bars 120 covered by perforated plates 121. The grooves are connected to an air pump which periodically produces a suction and holds the paper smoothly in position. The plunger 40 descends and forces the foremost article past the ledges 37 so that it carries the wrapper w, Fig. 14, with it on to the lower plunger 41, mounted so as to be depressed against the action of springs 62, and frictionally held in its positions of rest by a fibre plug 65 bearing on the side of the plunger rod 60. The upper plunger 40 rises and another article is fed beneath it, the position now being as shown in Fig. 14. During the descent of each article, the wrapper is dragged smoothly over the suction plates 121, and when the required number of articles has been pressed downwards, a rear top folder 140, Figs. 4 and 16, moves to the right to make the first top fold. The folder 140 is mounted on a carriage 141 sliding on rods 142 fixed on a carrier frame 143. The frame is mounted on rods 144 sliding in a guide 145 and carries a pusher 152 and rear side tuck folders 153. When the frame moves to the right, the top folder 140 travels with it until the leading edge strikes against the right-hand bar 120, which stops it, a rack 156 and spring- held gear segment 155 allowing it to yield, during the further travel of the frame. The folders 153 make the rear side tucks and the second top fold is made by the underside of the top plate 159 of a, wrapping channel D. Stationary folders 160, 161, 162 complete the end folding in ordinary fashion, as the package is pushed to the right by the succeeding ones, labels are applied at 163, and delivery belts convey, the..packages out of the machine. When the plunger 40 has completed the formation of an assembly for wrapping it recedes to the position shown in Fig. 16 so that the upturned side 42 engages the abutment 180 and keeps the machine running while the partially wrapped package beneath is being fed to the wrapping channel D, and also ensures, that the machine will be cleared even if no more articles are being fed. The other edge 43 of the plunger acts as a temporary abutment of the feed channel A until the plunger rises to its top position in readiness for another cycle of operations.