Patent ID: 6708857
Filing Date: 2004-03-23
Classification: C03B,Y10T

Abstract:
A method of cutting a glass duct, of which an external surface of the glass duct is provided with a coating layer, the method comprising the steps of:cutting the coating layer through all around at an axial location of the glass duct where the glass duct is to be notched; moving a cutting member and a counterpressure surface for the cutting member around the glass duct, the cutting member including a cutting part, the cutting part pressing perpendicularly against the glass duct at a first location of the glass duct, the counterpressure surface providing a counterpressure against the glass duct at a second location directly opposite the first location where the cutting part presses against the glass duct, thereby limiting a lateral displacement of the glass duct while the cutting part presses against the glass duct; and notching and breaking off the glass duct.