SYSTEMS AND METHODS FOR INDICATING THE POSITION OF A WEB
First Claim
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1. A method for indicating web displacement, comprising:
- moving an elongated, flexible web having a plurality of discrete scale features disposed thereon;
modulating energy using the scale features;
converting the modulated energy into a signal that provides indication of continuous web displacement.
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Abstract
Methods and systems for indicating the displacement of a flexible web are described. An elongated, flexible web includes an integral scale having scale features configured to modulate energy directed towards the web. A transport mechanism provides relative movement between the web relative to a transducer. The transducer detects energy modulated by the scale features and generates a signal indicting a continuous web displacement based on the modulated energy.
67 Citations
35 Claims
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1. A method for indicating web displacement, comprising:
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moving an elongated, flexible web having a plurality of discrete scale features disposed thereon; modulating energy using the scale features; converting the modulated energy into a signal that provides indication of continuous web displacement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for indicating web displacement, comprising:
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an elongated, flexible web having an integral scale disposed thereon, the scale comprising a plurality of discrete scale features configured to modulate energy directed towards the web; a transducer configured to sense the energy modulated by the scale features and to generate a signal indicting continuous web displacement based on the modulated energy; and a transport mechanism configured to provide relative movement between the web and the transducer. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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- 31. An apparatus comprising a flexible, elongated web having an integral scale, the scale comprising a pattern of scale features disposed on the web and configured to modulate energy directed toward the web, the modulated energy indicative of a continuous displacement of the web.
Specification