METHOD FOR TEMPERING GLASS SHEETS
First Claim
1. A method for heat strengthening or tempering glass sheets, in which one or more glass sheets are heated in a furnace to a tempering temperature and the one or more glass sheets are transferred at a transfer speed (W) away from the furnace into a quenching unit, in which quenching is conducted by blasting cooling air onto both surfaces of the one or more glass sheets, and in which by an initial blasting unit, located between the furnace and the quenching unit, is blasted compressed air as an initial blasting onto leading and trailing edges of the one or more glass sheets,wherein the initial blasting is directed onto the surface of a side of the one or more glass sheets, to the direction of which normal it is desired to straighten the end in order to decrease end-edge kink, andwherein initial blasting distances from the leading edge of the one or more glass sheets towards the trailing edge of the one or more glass sheets, and from the trailing edge of the one or more glass sheets towards the leading edge of the one or more glass sheets, are 10-250 mm.
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Accused Products
Abstract
A method for heat strengthening or tempering glass sheets of a glass load containing several glass sheets, in which the glass sheets are heated in a furnace to a tempering temperature and the glass load is transferred at a transfer speed (W) away from the furnace into a tempering unit, in which the actual quenching is conducted by blasting cooling air onto both surfaces of the glass sheets. By an initial blasting unit, located between the furnace and the quenching unit and divided into initial blasting zones in the direction transverse to the motion of the glass, is blasted compressed air onto the surface of the leading and trailing edges of a glass sheet, to the direction of which normal it is desired to straighten the end in order to decrease end-edge kink.
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16 Claims
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1. A method for heat strengthening or tempering glass sheets, in which one or more glass sheets are heated in a furnace to a tempering temperature and the one or more glass sheets are transferred at a transfer speed (W) away from the furnace into a quenching unit, in which quenching is conducted by blasting cooling air onto both surfaces of the one or more glass sheets, and in which by an initial blasting unit, located between the furnace and the quenching unit, is blasted compressed air as an initial blasting onto leading and trailing edges of the one or more glass sheets,
wherein the initial blasting is directed onto the surface of a side of the one or more glass sheets, to the direction of which normal it is desired to straighten the end in order to decrease end-edge kink, and wherein initial blasting distances from the leading edge of the one or more glass sheets towards the trailing edge of the one or more glass sheets, and from the trailing edge of the one or more glass sheets towards the leading edge of the one or more glass sheets, are 10-250 mm.
Specification