Plastic pipe having a socket, and a method of providing a plastic pipe with a socket

US6550500B2 · kind B2 · utility

Assignee

• UPONOR INNOVATION AB · SE

Inventors

• Jyri Jarvenkyla · Viinijärvi, FI
• Esko Hippeläinen · Lahti, FI

Key dates

• Filing date: Oct 1, 2001
• Grant date: Apr 22, 2003
• Expiry date: Oct 1, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2009/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A plastic pipe provided with a socket and a method of providing a plastic pipe with a socket, whereby the socket comprises at least two layers. The orientation of at least one socket layer is different from the orientation of another layer and the orientation of at least one layer is different from the orientation of a body portion of the plastic pipe. The socket is made for instance from a plastic pipe comprising at least two layers. The orientation temperatures of at least two different layers are different. The plastic pipe is heated to a temperature at which the material of at least one layer is oriented during expansion and the material of at least one layer is substantially not oriented during expansion. The end of the plastic pipe is expanded at said temperature so as to provide it with a socket.