Method And Apparatus For Encoding Substrates With Information
First Claim
1. A paper-making method including:
- defining a two-dimensional signal that encodes plural bits of data;
defining a frequency-domain signal;
inverse transforming the frequency-domain signal to yield a pattern in the spatial domain; and
shaping an element utilized in the paper-making method in accordance with said spatial domain pattern; and
shaping the element of the paper-making method in accordance with a pattern corresponding to said signal.
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Abstract
The present invention provides methods and apparatus to encode substrates (e.g., paper, synthetics, etc.) with information. In one implementation a method is provided including: receiving data that corresponds to a two-dimensional signal that encodes plural bits of data; receiving data that corresponds to a frequency-domain signal, the data corresponding to a representation in a spatial domain through inverse transforming the frequency-domain signal; and defining characteristics for an element of a substrate-making process, the characteristics including at least a pattern representing the spatial domain representation and the two-dimensional signal.
29 Citations
20 Claims
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1. A paper-making method including:
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defining a two-dimensional signal that encodes plural bits of data;
defining a frequency-domain signal;
inverse transforming the frequency-domain signal to yield a pattern in the spatial domain; and
shaping an element utilized in the paper-making method in accordance with said spatial domain pattern; and
shaping the element of the paper-making method in accordance with a pattern corresponding to said signal. - View Dependent Claims (2, 3, 4, 5)
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6. A de-watering element for a paper-making apparatus, characterized in that its surface topology is patterned in accordance with the following method:
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defining a two-dimensional signal that encodes plural bits of data;
defining a frequency-domain signal;
inverse transforming the frequency-domain signal to yield a pattern in the spatial domain; and
shaping an element of the paper-making apparatus in accordance with said spatial domain pattern; and
shaping the element of the paper-making apparatus in accordance with a pattern corresponding to said signal. - View Dependent Claims (7, 8, 9)
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10. A method comprising:
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receiving data that corresponds to a two-dimensional signal that encodes plural bits of data;
receiving data that corresponds to a frequency-domain signal, the data corresponding to a representation in a spatial domain through inverse transforming the frequency-domain signal; and
defining characteristics for an element of a substrate-making process, the characteristics including at least a pattern representing the spatial domain representation and the two-dimensional signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification