Process for extruding a profile on a glazing and a glazing having an extruded profile

Abstract

A process for extruding a profile on a glazing comprises extruding the profile through a nozzle while it is being moved by a drive device along a first edge of a glazing, around a corner of the glazing and along a second edge of the glazing, the nozzle being rotated relative to the drive device as it moves around the corner. The extruded profile comprises a first edge portion extending along a first edge of the glazing, a sharp corner portion extending around a sharp corner of the glazing and a second edge portion extending along a second edge region of the glazing, the portions of the profile being continuous.

1 . A process for extruding a profile on to a glazing comprising, extruding the profile through an extrusion nozzle while the extrusion nozzle is being moved by drive means along a first edge region of the glazing, around a corner region of the glazing and along a second edge region of the glazing, characterised by rotating the extrusion nozzle relative to the drive means as the extrusion nozzle is moved around the corner region of the glazing. 
   
   
       2 . A process as claimed in  claim 1 , wherein the extrusion nozzle is rotated about a rotation axis which is maintained in a substantially orthogonal orientation to the surface of the glazing as the profile is being extruded. 
   
   
       3 . A process as claimed in  claim 1 , further comprising maintaining the material to be extruded at a pre-determined temperature before extrusion. 
   
   
       4 . A process as claimed in  claim 3 , wherein the pre-determined temperature is in the range 30° C. to 240°. 
   
   
       5 . A process as claimed in  claim 4  wherein the pre-determined temperature is in the range 30° C. to 140° C. 
   
   
       6 . A process as claimed in  claim 4  wherein the pre-determined temperature is in the range 140° C. to 240° C. 
   
   
       7 . A process as claimed in  claim 1 , wherein the material to be extruded comprises polyurethane or a thermoplastic elastomer. 
   
   
       8 . A glazing having an extruded profile, the extruded profile comprising a first edge portion extending along a first edge region of the glazing, a sharp corner portion extending around a sharp corner region of the glazing and a second edge portion extending along a second edge region of the glazing, characterised in that the first edge portion, the sharp corner portion and the second edge portion are continuous. 
   
   
       9 . A glazing as claimed in  claim 8 , wherein the sharp corner portion of the profile has a radius of 5 cm or below. 
   
   
       10 . A glazing as claimed in  claim 8 , wherein the polymer comprises polyurethane or a thermoplastic elastomer.