| 摘要 |
343,140. Paper milk bottles. RISTOW, C., 47, Hasenheide, Berlin. Nov. 13, 1929, No. 34689. Convention date, May 1. [Classes 18, 66, and 125 (iii).] Paper milk bottles are made from a web 10, Fig. 1, which in its passage to the winding mandrel 15 passes over a glueing roller 11 having a peripheral sector-shaped recess so arranged that the part of the web which forms the outer surface of the wound tube remains free from glue; the web passing to the mandrel is severed by a cutter 14 and the wound tube is moved by a slidable stripper 18 beneath a brushing roller 19, Fig. 3, and a roller 20 for removing any surplus glue and a succeeding tube pushes the brushed tube on to a conical folding mandrel 21 forming the free end of the mandrel 15. The conical end of the mandrel 21 is formed with grooves and spring-controlled pivoted fingers 23 carried by a rotary sheath 24 are actuated by a reciprocating ring 27 to press and fold the end of the wound tube into the grooves in the folding mandrel. The tube is then pushed into one of a series of recesses 31 in a rotary mould 30 and carried thereby in front of a mandrel 32, Fig. 6, which forces the folded end of the tube into a conical part 33 of the mould ; the mould is heated and the end of the tube is supported by a reciprocating die 34. At the next stop a stamp 36, Fig. 7, having a reentrant part 37 is advanced to fold the conical end of the tube inwards, and a bottom, cut from a web 38 by a stamp 39<1> and flanged in a draw-ring 39, is forced into the cylindrical end of the tube which has already been expanded by a conical part 40 of the mandrel 32. The bottle is then carried in front of a head by which the edge and flange of the bottom are rolled together while the infolded conical end of the bottle is grooved by a stamp to the form shown in Fig. 17 ; at the next stop of the rotary mould the completed bottle is ejected therefrom. The paper web after glueing may be provided with print and embossings by rollers 12, 13. |
