| 摘要 |
A powder-coated glass panel in which print ( 5 ) on the back ( 4 ) of a transparent polyester coating ( 2 ) carried by a glass sheet ( 1 ), is covered by an epoxy coating ( 6 ), and the longitudinal margin ( 9 ) of metal foil ( 7 ) covering the edges of the panel overlaps onto the back of the coating ( 6 ) to relieve thermal stress in the sheet ( 1 ). Heat to melt and cure the powders forming the coatings ( 2, 6 ) and to cure the printing ink ( 5 ) is applied through the sheet ( 1 ) from infra-red lamps ( 22 ) mounted within an internally-reflective trough ( 23 ). The frequency of the radiation is varied from high to low during heating. A double-glazed spandrel unit includes the panel ( 31 ) mounted with spacing behind a facing-sheet ( 32 ), and with metal foil ( 34 ) covering the edges of the unit and overlapping marginally ( 37 ) onto the back ( 38 ) of the panel ( 31 ) for thermal-stress relief.
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