Patent ID: 7268315
Filing Date: 2007-09-11
Classification: B41J

Abstract:
1. A method, comprising: cutting a slot in a first side of a substrate using a eight beam; monitoring a surface of a second side of the substrate that is opposite the first side, using an optical sensor, while cutting the slot; and detecting the light beam, using the sensor, if the light beam breaks through the surface of the second side, wherein if the light beam breaks through the surface of the second side, comparing an output of the sensor indicative of a size of a hole in the surface of the second side to a predetermined size and activating an alarm and/or stopping the light beam if the size of the hole in the surface of the second side formed by the light beam breaking through the second side exceeds the predetermined size; wherein cutting the slot in the first side of substrate using the light beam further comprises using a water-containing jet in conjunction with the light beam.