Laser coding
AssigneeSherwood Technology, Inc.
InventorNazir Khan
Life of this patent
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Abstract
A method for making an object, wherein the object comprises a material including a functional group and a metal compound or acid that causes an elimination reaction on irradiation with a laser, to form a reaction product of contrasting colour, comprises directing a laser beam on to the areas of the object to be marked. For example, by using a carbohydrate and a metal salt, effective marking can be achieved on the coating of a pill or other edible material.
Claims13
A method for marking an object, wherein the object comprises a material including a functional group and a metal compound or acid that reacts with the functional group and causes an elimination reaction on irradiation with a laser, to form a reaction product of contrasting colour, which comprises directing a laser beam on to the areas of the object to be marked, whereby those areas are marked by the presence of said reaction product.
Dependencies are inferred from the claim text.