Method of heating glass panels for tempering and apparatus applying the method

The invention relates to a method of heating glass panels for tempering. The horizontal glass panels are heated in a lehr by upper and lower convection blast and by upper and lower radiation heating, information representing a load of the glass panels and used for the control and/or regulation of he...

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Main Authors Janhunen, Toivo, Pesonen, Tarmo
Format Patent
LanguageEnglish
Published 04.12.2012
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Abstract The invention relates to a method of heating glass panels for tempering. The horizontal glass panels are heated in a lehr by upper and lower convection blast and by upper and lower radiation heating, information representing a load of the glass panels and used for the control and/or regulation of heating is read, the upper radiation heating is controlled and/or regulated in the way of a matrix by a profiling both in a conveying direction and a direction lateral thereto. At least the upper convection blast is controlled and/or regulated in various sections of the lehr in the way of a matrix by a profiling both in a conveying direction and a direction lateral thereto, and the relative blast effects of convection blowing elements successive in the conveying direction are regulated for a profiling in the conveying direction. The invention relates also to an apparatus applying the method.
AbstractList The invention relates to a method of heating glass panels for tempering. The horizontal glass panels are heated in a lehr by upper and lower convection blast and by upper and lower radiation heating, information representing a load of the glass panels and used for the control and/or regulation of heating is read, the upper radiation heating is controlled and/or regulated in the way of a matrix by a profiling both in a conveying direction and a direction lateral thereto. At least the upper convection blast is controlled and/or regulated in various sections of the lehr in the way of a matrix by a profiling both in a conveying direction and a direction lateral thereto, and the relative blast effects of convection blowing elements successive in the conveying direction are regulated for a profiling in the conveying direction. The invention relates also to an apparatus applying the method.
Author Janhunen, Toivo
Pesonen, Tarmo
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References Day et al. (3406021) 19681000
(106256) 19990800
Muller et al. (6064040) 20000500
(20020486) 20020900
(WO 2004/024642) 20040300
Vitkala et al. (2003/0061834) 20030400
(1241143) 20020900
(1279645) 20030100
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(0937687) 19990800
Vitkala (6845633) 20050100
Kormanyos (6045358) 20000400
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