Patent ID: 9162373
Filing Date: 2015-10-20
Classification: B29B,B29C

Abstract:
1. A heating system for heating a body of a preform, the heating system comprising: a body of a preform having a material thickness bounded by a first surface and a second surface, a light source arrangement for emitting light, and a coupling arrangement having a longitudinal axis and being directly connected to the body so that the longitudinal axis defines a first angle with the first surface other than 90 degrees and a second angle offset from normal of the first surface such that the coupling arrangement is arranged to couple light from the light source arrangement into the body at a third angle above a critical angle at which the light would be coupled out of the body and relative to the first surface wherein the light travels along a longer path that is at least twice as long as the shortest distance between the first and second surfaces within the material of the body between the first and second surfaces until at least half of the energy of the light is absorbed by the body.