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US 12,296,525 B2Granted
Signaling arrangements employing molded thermoplastics
AssigneeDigimarc Corporation
InventorsTomas Filler, Vojtech Holub, Hugh L. Brunk, Ravi K. Sharma
Life of this patent
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AssigneeDigimarc Corporation
InventorsTomas Filler, Vojtech Holub, Hugh L. Brunk, Ravi K. Sharma
Estimating the term…
A thermoplastic resin, such as PET, is molded to define a 2D code signal, such as a digital watermark pattern. The mold can comprise an array of hole or spike features, some of which are directly vented to atmospheric pressure. A network of channels can link the other features to the directly-vented features, so all features are vented. A mold comprising spike features can form a digital watermark pattern on an item such that the watermark payload is decodable both from the side of the item that contacted the mold, and also from the opposite, non-contact side of the item. To aid entry of viscous thermoplastic among the very fine elemental features of a mold representing a watermark signal pattern, the features can be overlapped, forming a connected binary mark having larger features. A variety of other improvements and arrangements are also detailed.
A substrate marked with a pattern of elements defining a binary signal pattern, the binary signal pattern comprising a first square pattern block that is tiled edge-to-edge with other square pattern blocks to span an area, the edges of the first square pattern block defining two perpendicular directions, wherein said binary signal pattern comprises one or more first elements each having a template shape spanning a first area, and one or more second elements each spanning a larger area that is a non-integral multiple of the first area, wherein one of said second elements is shaped as a union of said template shape and a duplicate of said template shape, overlapped in area by an amount equal to more than 50% of said first area spanned by the template shape, and wherein respective centers of said overlapped template shape and duplicate template shape are offset from each other in both of said two perpendicular directions, by differing distances.
A substrate marked with a pattern of elements defining a binary signal pattern, wherein said binary signal pattern comprises one or more first elements each having a template shape spanning a first area, and one or more second elements each spanning a larger area that is a non-integral multiple of the first area, wherein one of said one or more second elements is shaped as a union of said template shape and a duplicate of said template shape, overlapped in area by an amount equal to more than 50% of said first area spanned by the template shape, wherein the binary signal pattern comprises a first 2D pattern block that is tiled edge-to-edge with other 2D pattern blocks, said first 2D pattern block including at least two of said first elements and at least two of said second elements, and a combined count of between 150 and 2500 of said first elements and second elements.
A plastic food container having a surface textured with a pattern of elements, the pattern of elements defining a binary signal pattern, wherein said binary signal pattern comprises one or more first elements each having a template shape spanning a first area, and one or more second elements each spanning a larger area that is a non-integral multiple of the first area, wherein one of said one or more second elements is shaped as a union of said template shape and a duplicate of said template shape, overlapped in area by an amount equal to more than 50% of said first area spanned by the template shape, wherein the binary signal pattern comprises a first 2D pattern block that is tiled edge-to-edge with other 2D pattern blocks, said first 2D pattern block including at least two of said first elements and at least two of said second elements, and a combined count of between 150 and 2500 of said first elements and second elements.
Dependencies are inferred from the claim text.