Apparatus and method for drying or curing web materials and...

F - Mech Eng,Light,Heat,Weapons – 26 – B

Patent

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F26B 3/347 (2006.01) D21F 5/16 (2006.01)

Patent

CA 2234084

A radio frequency (RF) assisted floatation air bar dryer apparatus (10) and method for drying and/or curing a traveling web (11) includes RF generating means for delivering RF through field and RF stray field to the web (11) to heat the web (11), air bars (21) to direct air flow to the web (11) for cooling to facilitate emission of moisture therefrom and to avoid blistering due to overheating, an RF field reflector to reflect RF energy to the web (11), and a control system to monitor and to control air temperature and/or flow, RF field strength, and/or web temperature to maintain a balance between heating and cooling to obtain efficient high speed drying while avoiding damage to the web (11).

Sécheuse (10) à assistance haute fréquence (HF) à barres d'air flottantes et procédé de séchage et/ou de durcissement d'une bande mobile (11), cet appareil comprenant un générateur HF qui envoie une énergie haute fréquence sur la bande (11) au travers d'un champ et sous forme d'un champ de dispersion HF afin de chauffer ladite bande (11), des barres d'air (21) dirigeant l'écoulement d'air sur la bande (11) pour la refroidir et faciliter l'élimination de l'humidité de celle-ci, et éviter la formation de cloques dues à une surchauffe, un réflecteur de champ HF qui réfléchit l'énergie HF sur la bande (11), et un système de régulation destiné à contrôler et réguler la température et/ou l'écoulement de l'air, l'intensité du champ HF et/ou la température de la bande afin de maintenir un équilibre entre le chauffage et le refroidissement et d'obtenir un séchage haute vitesse efficace tout en évitant d'endommager la bande (11).

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