Back to results
US 12,217,108 B2Granted
Laser marking of machine-readable codes
AssigneeDigimarc Corporation
InventorsTomas Filler, Vojtech Holub, Hugh L. Brunk, Adnan M. Alattar
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeDigimarc Corporation
InventorsTomas Filler, Vojtech Holub, Hugh L. Brunk, Adnan M. Alattar
Estimating the term…
A surface is laser-etched to convey a 2D machine-readable code pattern. Various strategies are detailed to minimize the etching time. Some strategies include modifying the code pattern to reduce a path length traveled by the laser. Some strategies include modifying the code pattern to make it sub-optimal, i.e., making the code pattern a less-faithful approximation of an ideal code pattern. In some embodiments the etched surface is the surface of a plastic container, and the code pattern conveys information indicating the type of plastic of which the container is manufactured. A variety of other features and arrangements are also detailed.
A system for marking a workpiece, the system comprising first and second laser emitters and a controller, the controller being configured by control instructions to direct laser illumination from said laser emitters to locations on the workpiece at which marks are to be formed, wherein said control instructions configure the laser emitters to turn on and off independently of each other, yet the marks formed by the first and second laser emitters cooperate to form an area of 2D machine-readable coding from which a plural symbol payload is extractable by a compliant decoder.
A process of marking a plastic container with 2D code information, the process including the acts:
An apparatus for marking a plastic container with 2D code information, the apparatus comprising:
Dependencies are inferred from the claim text.