Patent GB-325561-A (GB)
Title: Improvements in machines for wrapping packages
IPC: B65B19/22
Filed: 1928-10-22
Abstract: 325,561. Marks, Sir G. C., (American Machine Foundry Co.). Oct. 22, 1928. Packeting by wrapping- up. - A machine for wrapping an outer sheet about a previously wrapped or partially wrapped package has a support for the package and means for wrapping the outer sheet around, and overhanging one end of, the support and package and for then folding the overhanging part over the end. The machine shown in Figs. 1, 2 and 3 is for wrapping a package of cigarettes previously wrapped in tinfoil. The sheets are placed in a hopper 20 and are fed out singly by friction rollers 31 on a shaft 30 driven by spiral and bevel gear 33, 215 and 209 from the main shalt 113. The sheets are fed by rollers 35, 37 and lugs 85 on conveyer chains 43 past a wheel 69 which pastes their edges at one side and rotary fingers 70 which paste their rear edges. The parts 69, 70 receive paste from a pot 62 by drums 72, 73 which with the parts 69, 70 are rotated through a hand operated clutch 56 and chain 51 from the shaft 30. Each sheet is received by a reciprocating support 95 having guiding walls 97, 98, 99 which carries the sheet over the top trough 181 of a turret 94. The packages of cigarettes with one end open. are fed by belts 115 from a foil wrapping machine and past fingers 116, Fig. 3, carried by parallel arms 118 from sleeves 120, which are reciprocated on guides 121. As the fingers move to the left, rollers 132 thereon, engaging cam-slots 134 cause them to close on the open rear end of a foil wrapper and fold the sides 137, as shown in Fig. 13, and then push the package P into the top trough 181. A plate 139 carried by rods 141 movable in guides 142 is then moved by springs 155, as permitted by linkwork and a cam, to press the sheet against the package P and the support 95 is withdrawn. The sheet is then wrapped around the package and trough by a flexible strip 158, Fig. 6, attached to the plate 139 and to spring-pressed levers 159 carried by forked head 170 reciprocated vertically in guides 171. The overlapping portions of the sheet are then pressed and sealed by means of the spring- pressed face 189, Fig. 6 of the slide 185, corresponding -to the trough in question, which is moved up by a roller 190 thereon in engagement with a groove 195 of a block 194 which is attached to a rack 196 engaged by a toothed segment 197 operated by linkwork. A thin plate 205, Fig. 9 on the slide 185 passes through a slot in the trough and folds up the lower end flap 206, Fig. 15, of the foil wrapper. The head 170 then returns and the turret is rotated step by step, the roller 190 passing from the block 194 into a groove 192, concentric with the turret in a fixed member. When the trough under consideration has moved through an angle of 60‹ and is again stationary the side flaps of the overhanging end of the outer wrapper are folded in, as shown in Fig. 15, by members 219, Fig. 3 carried by parallel arms 220, 221 operated by gear segments 230, &c. The lower flap 232, Fig. 15, is then folded up by a plate 233, Fig. 2, on parallel arms 236. The upper flap 249 is then folded in by a similar plate 250. As turret advances, the flap 249 passes from the plate 250 to a plate 263, which is heated at 264 to dry the paste and is pressed, against action of springs 275, Fig. 1, to engage the package ends, when the turret is stationary. When the trough has moved through an angle of 270‹ the roller 190 passes into a groove in a block 277, Fig. 6, which is moved radially inwards so that the press face 189 is withdrawn and the roller is in position to pass into a groove 191 concentric with the groove 192. Then a blade 299, Figs. 2 and 9, mounted on a slide 298, is moved into position behind the package P thus folding the fourth flap 307, Fig. 15 of the foil wrapper. The slide and blade 299 are then advanced to push the package out of the trough 181 and into line with a delivery channel 318 the pasted end being held by a spring plunger 312. The package is then pressed by a plate 322 into the channel 318 the hinged side 317, normally pressed in by a spring 337, Fig. 2, being withdrawn, during the movement of the packages, by a wedge 334. The presence of a -package without an outer wrapper is detected by a contact 338, Fig. 6, of a bell circuit 340 connected to the machine frame, completing the circuit through the foil wrapper.