초록 ▼

The present invention relates to a ventilation tube particularly for medical devices, which has the particularity that it comprises a tubular body made of flexible plastics which forms raised ridges on its outer surface. An electric wire is embedded in at least part of the ridges and forms an electr

The present invention relates to a ventilation tube particularly for medical devices, which has the particularity that it comprises a tubular body made of flexible plastics which forms raised ridges on its outer surface. An electric wire is embedded in at least part of the ridges and forms an electric resistor for heating the gaseous substance that flows inside the tubular body.

대표청구항 ▼

[ What is claimed is:] [10.]10. A process for making a ventilation tube for use with medical devices comprising:simultaneously extruding an elongate flexible, seamless, extruded plastic conduit having a uniform inside diameter and a helical plastic ridge formed on an outside diameter of said conduit

[ What is claimed is:] [10.]10. A process for making a ventilation tube for use with medical devices comprising:simultaneously extruding an elongate flexible, seamless, extruded plastic conduit having a uniform inside diameter and a helical plastic ridge formed on an outside diameter of said conduit;inserting wire conductors uniformly in said ridge while said ridge is being extruded to form an electric resistor for heating a gas that flows inside the tube.