초록 ▼

A method is disclosed of making a component consisting of a substantially cylindrical support through which there is a substantially coaxial orifice and a membrane welded to one end of the cylinder substantially perpendicularly to a longitudinal axis of the support. A substantially plane membrane is

A method is disclosed of making a component consisting of a substantially cylindrical support through which there is a substantially coaxial orifice and a membrane welded to one end of the cylinder substantially perpendicularly to a longitudinal axis of the support. A substantially plane membrane is welded to one end of a support substantially perpendicularly to a longitudinal axis of the support and, after cooling, the support is torn off the membrane in a direction substantially perpendicular to the plane of the membrane so that a portion of the membrane substantially corresponding to the end of the cylinder remains welded to the support. The method can be applied to making two-part stoppers for straws, in which case the membrane is microporous, hydrophobic, impervious to liquids and permeable to gases and the support is an insert made from a material chosen from an elastomer material, a thermoplastics material and a thermoplastics elastomer material.

대표청구항 ▼

1. A method of making a straw stopper consisting of a substantially cylindrical support through which there is a substantially coaxial orifice and a microporous and hydrophobic membrane welded to one end of said cylinder substantially perpendicularly to a longitudinal axis of said support, in which

1. A method of making a straw stopper consisting of a substantially cylindrical support through which there is a substantially coaxial orifice and a microporous and hydrophobic membrane welded to one end of said cylinder substantially perpendicularly to a longitudinal axis of said support, in which method a substantially plane membrane is thermally welded to one end of said substantially cylindrical support substantially perpendicularly to said longitudinal axis of said support and, after cooling, said support is torn off said membrane in a direction substantially perpendicular to the plane of said membrane so that a portion of said membrane substantially corresponding to said end of said cylinder remains welded to said support, in which a pre-cut of the membrane is formed at the time of said thermal welding, enabling it to be torn without burrs and in which said support is trapped by means of a stripper and traction is then applied to said membrane substantially in the direction of said longitudinal axis of said support.