Patent US5450165A successfully refreshed from Google Patents.
US5450165A
Expired / Lapsed
US
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System for identifying areas in pre-existing image data as test patches for print quality measurement
Assignee: Xerox Corp
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Filing: 1994-02-23
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Granted: 1995-09-12
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Expires: 2014-02-23
Abstract
Abstract In a printing apparatus for creating images on a sheet in response to digital data, the incoming data is polled for image data corresponding to a preselected density condition, such as a particular half-tone, on an area of the final image. The area having the density condition can be used as a test patch to monitor overall print quality.
Inventors
- 👤 Thomas A. Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:13
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5033; G03G15/5041; H; H04; H04N; H04N1/00; H04N1/00002; H04N1/00005; H04N1/00007; H04N1/00015; H04N1/00026; H04N1/00034; H04N1/00047; H04N1/0005; H04N1/00063; H04N1/00071; H04N1/00082; H04N1/23; H04N1/29; H04N1/295; H04N1/46; H04N1/56; H04N1/60; H04N1/603; H04N1/6033; H04N1/6047; G03G2215/00; G03G2215/00025; G03G2215/00029; G03G2215/00033; G03G2215/00037; G03G2215/00042
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
61 words
A method of controlling a printing machine, comprising the steps of: forming a visible image of a selected portion of information being printed by the printing machine; polling the portion of information for information consistent with an area in the visible image having a preselected density condition; and determining the visible image density in the area having the preselected density condition.
Claim 2
Independent Claim
61 words
A method of controlling a printing machine, comprising the steps of: forming a visible image of a selected portion of information being printed by the printing machine; polling the portion of information for information consistent with an area in the visible image having a preselected density condition; and determining the visible image density in the area having the preselected density condition.
Claim 3
Dependent Claim
31 words
The method of claim 1, further comprising the step of controlling a process station in the printing machine as a function of the visible image density determined in said determining step.
Claim 4
Dependent Claim
38 words
The method of claim 1, further comprising the step of selecting the portion of information as that information which corresponds to an area of the visible image which is detectable by a densitometer disposed within the printing machine.
Claim 5
Dependent Claim
90 words
The method of claim 1, further comprising the steps of selecting a plurality of portions of information, each portion corresponding to an area of the visible image which is detectable by one of a plurality of densitometers disposed within the printing machine; polling each portion of information for information consistent with an area in the visible image having a preselected density condition; and activating one of the plurality of densitometers where the preselected density condition exists, to determine the visible image density in the area having the preselected density condition.
Claim 6
Independent Claim
71 words
A system for controlling a printing machine, comprising: an image receiving member; means for forming a visible image of a selected portion of information being printed by the printing machine on the receiving member; means for polling the portion of information for information consistent with an area in the visible image having a preselected density condition; and means for sensing the area having the preselected density condition on the receiving member.
Claim 7
Independent Claim
71 words
A system for controlling a printing machine, comprising: an image receiving member; means for forming a visible image of a selected portion of information being printed by the printing machine on the receiving member; means for polling the portion of information for information consistent with an area in the visible image having a preselected density condition; and means for sensing the area having the preselected density condition on the receiving member.
Claim 8
Dependent Claim
30 words
The system of claim 5, further comprising means for controlling a process station in the printing machine as a function of the visible image density determined by the sensing means.
Claim 9
Dependent Claim
33 words
The system of claim 5, further comprising means for selecting the portion of information as that information which corresponds to an area of the visible image which is detectable by the sensing means.
Claim 10
Dependent Claim
19 words
The system of claim 5, wherein the sensing means comprises a plurality of densitometers disposed adjacent the receiving member.
Claim 11
Dependent Claim
96 words
The system of claim 8, further comprising means for selecting a plurality of portions of information as that information which corresponds to an area of the visible image which is detectable by one of the plurality of densitometers; means for polling each portion of information being printed by the printing machine for information consistent with an area in the visible image having a preselected density condition; and means for activating one of the plurality of densitometers where the preselected density condition exists, to determine the visible image density in the area having the preselected density condition.
Claim 12
Independent Claim
62 words
A method of testing print quality in a printing machine, comprising the steps of: polling the subset of image data for image data corresponding to a preselected density condition; and identifying, for an image to be printed, image data corresponding to a preselected density condition within a subset of image data corresponding to a preselected location of the image to be printed.
Claim 13
Independent Claim
62 words
A method of testing print quality in a printing machine, comprising the steps of: polling the subset of image data for image data corresponding to a preselected density condition; and identifying, for an image to be printed, image data corresponding to a preselected density condition within a subset of image data corresponding to a preselected location of the image to be printed.
Claim 14
Dependent Claim
31 words
The method of claim 10, wherein the polling step includes the step of polling the subset of image data for a quantity of contiguous image data having a preselected density condition.
Claim 15
Dependent Claim
26 words
The method of claim 10, wherein the polling step includes the step of averaging a sample set of density values of image data in the subset.
Claim 16
Dependent Claim
55 words
The method of claim 10, further comprising the steps of: creating an image on a surface according to the image data; moving the surface through a path; and identifying a subset of image data as data corresponding to a portion of the image that passes near the densitometer when the surface moves through the path.
Claim 17
Dependent Claim
57 words
The method of claim 10, further comprising the steps of: creating an image on a surface according to the image data; determining a density of printing material at a preselected location on the surface having the preselected density condition; and controlling a process station in the printing machine as a function of the density of printing material.
Claim 18
Dependent Claim
62 words
The method of claim 10, wherein the printing machine includes a plurality of densitometers for determining density of printing material at corresponding preselected locations on a surface, further comprising the step of identifying, for an image to be printed, a plurality of subsets of image data, each subset corresponding to a portion of the image in one preselected location of the surface.
Claim 19
Dependent Claim
45 words
The method of claim 15, further comprising the steps of: polling each subset of image data for image data corresponding to a preselected density condition; and activating one of the plurality of densitometers corresponding to the subset of image data having the preselected density condition.
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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) | 1998-09-11 | 1999-03-13 | 1999-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-11 | 2003-03-13 | 2003-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-11 | 2007-03-13 | 2007-09-12 | $7700.00 | Window Closed / Lapsed |