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US 7,401,778 B2Granted
Multi-sheet feed detection system
AssigneeHewlett-Packard Development Company, L.P.
InventorTroy Roberts
Life of this patent
Estimating the term…
Abstract
A multi-sheet feed detection system comprises a photosensor configured to receive light emitted in a non-visible spectrum by a transmitter through at least one sheet, and a detection module configured to detect a multi-sheet feed condition based on an amount of non-visible light received by the photosensor.
Claims32
A multi-sheet feed detection system, comprising:
- a photosensor configured to receive light emitted in a non-visible spectrum by a transmitter through at least one sheet and configured to receive visible light for generating a scanned image of a sheet;
- and
- a detection module configured to detect a multi-sheet feed condition based on an amount of non-visible light received by the photosensor.
A multi-sheet feed detection system, comprising:
- means for receiving light emitted in a non-visible spectrum through at least one sheet, the receiving means comprises means for receiving light in a visible spectrum for generating a scanned image of a sheet;
- and
- means for detecting a multi-sheet feed condition based on an amount of non-visible light received by the receiving means.
A method of manufacturing a multi-sheet feed detection system, comprising:
- providing a photosensor configured to receive light emitted by a transmitter in a non-visible spectrum through at least one sheet;
- providing a detection module configured to detect a multi-sheet feed condition based on an amount of non-visible light received by the photosensor;
- and
- configuring the photosensor to receive light in a visible spectrum for generating a scanned image of a sheet.
1 more element
A multi-sheet feed detection system, comprising:
- a photosensor configured to receive light in a first portion of a light spectrum for generating a scanned image of at least one sheet;
- and
- a detection module configured to detect a multi-sheet feed condition based on an amount of light transmitted through at least a portion of the at least one sheet and collected by the photosensor in a different portion of the light spectrum than the first portion.
Dependencies are inferred from the claim text.