Patent ID: 6137085
Filing Date: 2000-10-24
Classification: H05B,Y02B

Abstract:
degree. C. up to 90% of an equilibrium temperature in the range of 35 to 45.degree. C. is generated in 5 to 10 minutes after supply of the reference electric power to the heating strips starts where the distance between adjacent two of the heating strips at portions thereof disposed in a central region of the window glass is in the range of 29 to 33 mm, the improvement wherein the distance between adjacent two of said heating strips at least at portions thereof disposed in a central region of said window glass is modified to from 20 to 28 mm, and the resistance of said heating strips is modified so that an application of said reference electric power to said heating strips generates a reduced quantity of heat per unit area necessary for defogging and therefore to reduce a consumption of electric power which ranges from 0.80 to 0.95 times said predetermined quantity of heat per unit area at said central region.