Patent ID: 6031971
Filing Date: 2000-02-29
Classification: B29B,B29C,B32B

Abstract:
A system for heat treating a continuous web of material, the system comprising:a continuous web of material having a first region and a second region, said web of material moving in a predefined travel direction and defining a substantially planar surface;a plurality of substantially linear radiation elements spaced apart from each other by a first predetermined distance, said plurality of substantially linear radiation elements being divided into a first subgroup and a second subgroup, said first subgroup radiates said first region of said continuous web of material such that a temperature of said first region is within a first predetermined temperature range while said second subgroup radiates said second region of said continuous web of material such that a temperature of said second region is within a second predetermined temperature range, said first temperature range being substantially greater than said second temperature range, each linear radiation element being parallel to said substantially planar surface and oriented at an acute angle with respect to the predefined travel direction of said web of material; anda radiation restriction board having a length and a width, said length being substantially greater than said width, said length being oriented in at least one of a substantially parallel manner and at an acute angle relative to the travel direction of said web of material, said radiation restriction board including heat-resistant material having a substantially poor thermal conductivity, said radiation restriction board being spaced from said web of material by a second predetermined distance, whereby deviations from said second predetermined temperature range of said second region of said web of material are substantially reduced or eliminated.