Patent ID: 6791592
Filing Date: 2004-09-14
Classification: B41M,G06K

Abstract:
A method for printing a sequence of symbols on a material of a product, the method comprising:providing a printing system having a laser source for producing a printing beam; moving the product within a printing range of the printing beam; activating the printing beam when the product is within the printing range; continuously directing the printing beam to a plurality of locations on the product material without de-activating the printing beam; adjusting a dwell time of the printing beam as the printing beam is continuously directed to the plurality of locations to form a plurality of spots on the product material, the dwell time at each formed spot being longer than a dwell time on areas of the product material traveled by the printing beam between consecutive spots, the dwell time at each formed spot being sufficient to alter an optical characteristic of the product material; forming the plurality of snots to form a pixel on the product material; forming a plurality of pixels to form a symbol on the product material; forming a sequence of symbols, wherein the printing beam is remains incident upon the product material as the printing beam is directed to the plurality of locations on the product material until the entire sequence of symbols is formed; and de-activating the printing beam after forming the sequence of symbols.