Imaging an imprinted substrate on a printing press using an image sensor
First Claim
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1. A method of imaging an imprinted substrate on a printing press, comprising:
- sensing light reflected by the substrate using a contact image sensor to produce data representative of the imprinted substrate, wherein the substrate has been imprinted with different colors at a plurality of printing units of the printing press, each printing unit comprising a plate cylinder, wherein the data representative of the imprinted substrate is output by the contact image sensor as analog voltage signals;
receiving the analog voltage signals from the contact image sensor at a sensor interface circuit and converting the analog voltage signals to digital signals using an analog-to-digital converter of the sensor interface circuit;
processing the digital signals using the sensor interface circuit to produce corrected digital signals; and
storing data based on the corrected digital signals in a memory.
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Abstract
Systems and methods for imaging an imprinted substrate on a printing press is provided. One method comprises sensing light reflected by the substrate using a contact image sensor to produce data representative of the imprinted substrate. The substrate has been imprinted with different colors at a plurality of printing units of the printing press. Each printing unit comprises a plate cylinder. The data representative of the imprinted substrate is output by the contact image sensor as analog voltage signals. The method further comprises receiving the analog voltage signals from the contact image sensor at a sensor interface circuit and converting the analog voltage signals to digital signals using an analog-to-digital converter of the sensor interface circuit. The method further comprises processing the digital signals using the sensor interface circuit to produce corrected digital signals and storing data based on the corrected digital signals in a memory.
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Citations
20 Claims
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1. A method of imaging an imprinted substrate on a printing press, comprising:
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sensing light reflected by the substrate using a contact image sensor to produce data representative of the imprinted substrate, wherein the substrate has been imprinted with different colors at a plurality of printing units of the printing press, each printing unit comprising a plate cylinder, wherein the data representative of the imprinted substrate is output by the contact image sensor as analog voltage signals; receiving the analog voltage signals from the contact image sensor at a sensor interface circuit and converting the analog voltage signals to digital signals using an analog-to-digital converter of the sensor interface circuit; processing the digital signals using the sensor interface circuit to produce corrected digital signals; and storing data based on the corrected digital signals in a memory. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for imaging an imprinted substrate on a printing press, the system comprising:
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a light source configured to illuminate a portion of the substrate which has been imprinted with different colors at a plurality of printing units of the printing press, each printing unit comprising a plate cylinder; a contact image sensor configured to sense light reflected by the substrate, to produce data representative of the imprinted substrate based on the sensed light, and to output analog voltage signals based on the data representative of the imprinted substrate; a sensor interface circuit configured to receive the analog voltage signals, the sensor interface circuit comprising; an analog-to-digital conversion circuit configured to convert the analog voltage signals to digital signals; and a digital processing circuit configured to process the digital signals to produce corrected digital signals; and a memory configured to store data based on the corrected digital signals. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system comprising:
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a plurality of elements, wherein each element senses light reflected by a corresponding region on an imprinted substrate on a printing press to produce data representative of the corresponding region printed on the substrate, wherein a dimension of each element is substantially equal to a dimension of the corresponding region printed on the substrate, wherein the substrate has been imprinted with an image at a printing unit of the printing press, the printing unit comprising a plate cylinder, and wherein each element is configured to output analog voltage signals based on the data representative of the imprinted substrate; a sensor interface circuit configured to receive the analog voltage signals, the sensor interface circuit comprising; an analog-to-digital conversion circuit configured to convert the analog voltage signals to digital signals; and a digital processing circuit configured to process the digital signals to produce corrected digital signals; and a memory configured to store data based on the corrected digital signals. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification
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Current AssigneeBaldwin Americas Corporation (Forsyth Baldwin LLC)
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Original AssigneeQuad/Tech Incorporated
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InventorsPearson, Eric, Hansen, Mark R., Moersfelder, Bradly S., Noffke, Patrick James, Seymour, John C.
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Primary Examiner(s)Legasse, Jr., Francis M
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Application NumberUS13/475,746Publication NumberTime in Patent Office550 DaysField of Search25055904-55907, 25055937-55944, 356429-431, 358/474US Class Current250/559.39CPC Class CodesB41F 33/0081 Devices for scanning regist...
