| 摘要 |
PURPOSE:To enable to manufacture easily the titled straw without increasing the number of pieces of parts, by forming a stopper protrusion on the outside of the straw by heating and pressing the same partially, in manufacture of a straw with the stopper protrusion for a packed drink. CONSTITUTION:A continuous length straw 3 moving in the direction of an arrow 13 by a draw-off roll is made into a slightly flat ellipse state by passing through guide grooves 5 of pressing rollers 4, 4a which are being formed slightly smaller than the straw 3. As pressing protrusions 6, 6a are provided on both sides of the guide grooves 5, hereupon, the outside of the straw 3 is pressed partially by the pressing protrusions 6, 6a which are being heated to the extent of the temperature of 120-130 deg.C by a heater at every predetermined interval and stopper protrusions 14 are formed. The continuous length straw 3 whereon the stopper protrusions 14 are formed is cut off at every predetermined length and made into a straw 3P which is of a predetermined length and provided with the stopper protrusions. In addition to the above, the circumference of the pressing rolls 4, 4a are made into two times as long as of the straw 3P and two or the appropriate number of pieces of pressing protrusions are provided. |
