Patent US5748221A successfully refreshed from Google Patents.
US5748221A
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Apparatus for colorimetry gloss and registration feedback in a color printing machine
Assignee: Xerox Corp
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Filing: 1995-11-01
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Granted: 1998-05-05
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Expires: 2015-11-01
Abstract
Abstract A method and apparatus for measuring colorimetric, gloss and registration data on a substrate exiting a printing machine. A detector using a series of red, green, and blue filters collects image data and maps the collected data to absolute color coordinates. The apparatus is factory calibrated to the specific colorants used in the printing machine. Gloss measurements are made using the same apparatus. Registration data between the various color separations is also obtained and feedback delivered to the various imaging modules. The detector allows on the fly data to be obtained and machine specific corrections to be made.
Inventors
- 👤 Vittorio Castelli
- 👤 Edward J. Solcz
- 👤 John J. Ricciardelli
- 👤 Harold Anderson
- 👤 Harold Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:11
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/50; H04N1/506; G; G03; G03G; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/0174
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
91 words
A multi-function sensor for measuring registration, gloss and colorimetric values of a test patch image printed on a substrate in a multi-color printing machine, comprising: a first detector for determining a colorimetric value of the image and generating a signal indicative thereof; a second detector for determining a gloss value of the image and generating a signal indicative thereof; and a third detector for determining a registration value between a plurality of color separations in the image and generating a signal indicative thereof; a fourth detector for internal sensor parameter compensation.
Claim 2
Dependent Claim
91 words
A multi-function sensor for measuring registration, gloss and colorimetric values of a test patch image printed on a substrate in a multi-color printing machine, comprising: a first detector for determining a colorimetric value of the image and generating a signal indicative thereof; a second detector for determining a gloss value of the image and generating a signal indicative thereof; and a third detector for determining a registration value between a plurality of color separations in the image and generating a signal indicative thereof; a fourth detector for internal sensor parameter compensation.
Claim 3
Dependent Claim
36 words
An apparatus according to claim 1, wherein said first detector comprises: a red filter; a blue filter; a green filter; and a converter to convert a red, green, and blue signal to an absolute colorimetric value.
Claim 4
Dependent Claim
20 words
An apparatus according to claim 2, wherein said converter is specifically mapped to the colorants utilized in the printing machine.
Claim 5
Independent Claim
82 words
A method for determining colorimetric, gloss, and registration mark values in a full color electrophotographic printing machine, comprising: illuminating a test pattern with a light source; detecting the reflected signal from the test pattern; filtering the detected signal with a red, green, and blue filter respectively; and converting the filtered signals to colorimetric (L* a* b*) values and gloss values for the specific colorant in the printing machine while measuring the position of the relative color separations and generating signals indicative thereof.
Claim 6
Independent Claim
82 words
A method for determining colorimetric, gloss, and registration mark values in a full color electrophotographic printing machine, comprising: illuminating a test pattern with a light source; detecting the reflected signal from the test pattern; filtering the detected signal with a red, green, and blue filter respectively; and converting the filtered signals to colorimetric (L* a* b*) values and gloss values for the specific colorant in the printing machine while measuring the position of the relative color separations and generating signals indicative thereof.
Claim 7
Dependent Claim
81 words
A full color electrophotographic printing machine having an integral device for determining colorimetric, gloss, and registration values for a test patch image, comprising: a first detector for determining a colorimetric value of the image and generating a signal indicative thereof; a second detector for determining a gloss value of the image and generating a signal indicative thereof; and a third detector for determining a registration value between a plurality of color separations in the image and generating a signal indicative thereof.
Claim 8
Dependent Claim
81 words
A full color electrophotographic printing machine having an integral device for determining colorimetric, gloss, and registration values for a test patch image, comprising: a first detector for determining a colorimetric value of the image and generating a signal indicative thereof; a second detector for determining a gloss value of the image and generating a signal indicative thereof; and a third detector for determining a registration value between a plurality of color separations in the image and generating a signal indicative thereof.
Claim 9
Dependent Claim
36 words
A printing machine according to claim 5, wherein said first detector comprises: a red filter; a blue filter; a green filter; and a converter to convert a red, green, and blue signal to a colorimetric value.
Claim 10
Dependent Claim
21 words
A printing machine according to claim 6, wherein a converter is specifically created for the colorants utilized in the printing machine.
Claim 11
Dependent Claim
92 words
A multi-function sensor for measuring registration, gloss and colorimetric values of a test patch image printed on a substrate in a multi-color electrophotographic printing machine, comprising: a first detector for determining a colorimetric value of the image and generating a signal indicative thereof; a second detector for determining a gloss value of the image and generating a signal indicative thereof; and a third detector for determining a registration value between a plurality of color separations in the image and generating a signal indicative thereof; a fourth detector for internal sensor parameter compensation.
Claim 12
Dependent Claim
92 words
A multi-function sensor for measuring registration, gloss and colorimetric values of a test patch image printed on a substrate in a multi-color electrophotographic printing machine, comprising: a first detector for determining a colorimetric value of the image and generating a signal indicative thereof; a second detector for determining a gloss value of the image and generating a signal indicative thereof; and a third detector for determining a registration value between a plurality of color separations in the image and generating a signal indicative thereof; a fourth detector for internal sensor parameter compensation.
Claim 13
Dependent Claim
36 words
A sensor according to claim 8, wherein said first detector comprises: a red filter; a blue filter; a green filter; and a converter to convert a red, green, and blue signal to an absolute colorimetric value.
Claim 14
Dependent Claim
20 words
A sensor according to claim 9, wherein said converter is specifically mapped to the colorants utilized in the printing machine.
Claim 15
Dependent Claim
61 words
A multi-function sensor for measuring gloss and optical density values of a test image printed on a substrate in a black and white printing machine, comprising: a first detector for determining a density value of the image and generating a signal indicative thereof; and a second detector for determining a gloss value of the image and generating a signal indicative thereof.
Claim 16
Dependent Claim
61 words
A multi-function sensor for measuring gloss and optical density values of a test image printed on a substrate in a black and white printing machine, comprising: a first detector for determining a density value of the image and generating a signal indicative thereof; and a second detector for determining a gloss value of the image and generating a signal indicative thereof.
Claim 17
Dependent Claim
27 words
A sensor according to claim 11, wherein said first detector comprises: a green filter; and a converter to convert a green signal to an absolute density value.
Claim 18
Dependent Claim
78 words
An integral apparatus for measuring registration, gloss and colorimetric values of a test patch image printed on a substrate, comprising: a first detector for determining a colorimetric value of the image and generating a signal indicative thereof; a second detector for determining a gloss value of the image and generating a signal indicative thereof; and a third detector for determining a registration value between a plurality of color separations in the image and generating a signal indicative thereof.
Claim 19
Dependent Claim
78 words
An integral apparatus for measuring registration, gloss and colorimetric values of a test patch image printed on a substrate, comprising: a first detector for determining a colorimetric value of the image and generating a signal indicative thereof; a second detector for determining a gloss value of the image and generating a signal indicative thereof; and a third detector for determining a registration value between a plurality of color separations in the image and generating a signal indicative thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-04 | 2001-11-03 | 2002-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-04 | 2005-11-03 | 2006-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-04 | 2009-11-03 | 2010-05-05 | $7700.00 | Window Closed / Lapsed |