| 摘要 |
The tubular unit, to transfer a beverage into a container by the application of an under pressure at one end, is calibrated to fit into the container opening or the wall of the liquid passage. A unit forms the outer surface of the tube into a projection which locks into the opening or passage and cannot be pulled out. The end projection of the tube has a truncated cone shape, tapering towards the tube end and with the smaller diameter leading. The trailing end of the projection is flat, as a limit stop. The enlarged ring projection is of a thermoplastic material, where an end of the suction tube is turned back on itself and shaped into a truncated cone with a limit stop surface. An Independent claim is included for a mfg. process using a mold with a ring cavity impression to turn back one end of the tube. The mold is heated to the molding temp. of the tubular material, for it to be pressed axially into the cavity impression at the suction end to shape the end projection of the required length. Using a second ring cavity impression, with an inner diameter matching the tube, the outer surface has a truncated cone shape to be heated to mold the end projection of the tube when it is pressed in axially. |
