US5510877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for lateral registration control in color printing
Assignee: Xerox Corp
•
Filing: 1994-04-20
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Granted: 1996-04-23
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Expires: 2014-04-20
Abstract
Abstract A method and apparatus is provided for controlling the transverse registration of an image area to be exposed on a longitudinally moving belt by providing belt edge profile data, detecting a lateral position of the belt during movement of the belt by measuring the lateral position of the belt edge, and adjusting the transverse location of the image on the belt to compensate for a difference between the detected lateral belt edge position and the belt edge profile data. In addition, a method and apparatus is provided for controlling the lateral position of a longitudinally moving endless belt by generating a steering command signal by calculating a difference between the detected first lateral position of the belt edge and the belt edge profile data corresponding to the first longitudinal position, and adjusting the lateral position of the belt by steering the belt in response to the steering command.
Inventors
- 👤 Joannes N. M. dejong
- 👤 Jan Bares
- 👤 Vittorio R. Castelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:37
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/75; G03G15/754; G03G15/755; B; B41; B41J; B41J13/00; B41J13/26; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/129; H; H04; H04N; H04N1/00; H04N1/04; H04N1/047; H04N1/053; H04N1/46; H04N1/50; H04N1/506; G03G2215/00; G03G2215/00135; G03G2215/00139; G03G2215/00143; G03G2215/00156; G03G2215/0016; G03G2215/00164; G03G2215/01; G03G2215/0167; G03G2215/0174; H04N1/113; H04N1/1135; H04N1/12; H04N2201/00; H04N2201/024; H04N2201/02406; H04N2201/02439; H04N2201/04; H04N2201/047; H04N2201/04701; H04N2201/0471; H04N2201/04732; H04N2201/04741; H04N2201/04753; H04N2201/04755; H04N2201/04756; H04N2201/04758; H04N2201/04767; H04N2201/04781; H04N2201/04786; H04N2201/04787; H04N2201/04794
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
152 words
A method for transverse registration of an image area to be exposed on a longitudinally moving belt subject to lateral deviation from linear travel, said method comprising the steps of: providing belt edge profile data relating i) each of a plurality of longitudinal positions along said moving belt to ii) a lateral position of an edge of the belt with respect to a spatially fixed reference point; detecting a first lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge at a first one of said plurality of longitudinal positions along said belt; and, adjusting the transverse location of the image area on the belt by shifting an active scan line to compensate for a difference between the detected first lateral position of said belt edge and the belt edge profile data related to said first one of said plurality of longitudinal positions.
Claim 2
Independent Claim
152 words
A method for transverse registration of an image area to be exposed on a longitudinally moving belt subject to lateral deviation from linear travel, said method comprising the steps of: providing belt edge profile data relating i) each of a plurality of longitudinal positions along said moving belt to ii) a lateral position of an edge of the belt with respect to a spatially fixed reference point; detecting a first lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge at a first one of said plurality of longitudinal positions along said belt; and, adjusting the transverse location of the image area on the belt by shifting an active scan line to compensate for a difference between the detected first lateral position of said belt edge and the belt edge profile data related to said first one of said plurality of longitudinal positions.
Claim 3
Dependent Claim
142 words
The method for transverse registration of an image area according to claim 1 wherein: the step of providing said belt edge profile data includes the step of providing average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt repeatedly passing adjacent said spatially fixed reference point to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said spatially fixed reference point; and, the step of adjusting the transverse location of the image area includes the step of adjusting the transverse location of the image area on the belt to compensate for a difference between the detected first lateral position of said belt edge and the average belt edge profile data related to said first one of said plurality of longitudinal positions.
Claim 4
Dependent Claim
158 words
The method for transverse registration of an image area according to claim 2 wherein: the step of providing said average belt edge profile data includes the step of providing moving average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt passing adjacent said spatially fixed reference point for a predetermined number of belt cycles to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said spatially fixed reference point for said predetermined number of belt cycles; and, the step of adjusting the transverse location of the image area includes the step of adjusting the transverse location of the image area on the belt to compensate for a difference between the detected first lateral position of said belt edge and the moving average belt edge profile data related to said first one of said plurality of longitudinal positions.
Claim 5
Dependent Claim
24 words
The method for transverse registration of an image area according to claim 1 wherein the active scan line is shifted in a transverse direction.
Claim 6
Dependent Claim
38 words
The method for transverse registration of an image area according to claim 1 further including generating the active scan line from a transverse scan line which has a length greater than a length of the active scan line.
Claim 7
Dependent Claim
30 words
The method for transverse registration of an image area according to claim 5 wherein the length of the transverse scan line is greater than a length of the image area.
Claim 8
Independent Claim
320 words
A method for transverse registration of an image area to be exposed on a longitudinally moving belt subject to lateral deviation from linear travel, said method comprising the steps of: providing belt edge profile data relating i) each of a plurality of longitudinal positions along said moving belt to ii) a lateral position of an edge of the belt with respect to a spatially fixed reference point; detecting a first lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge at a first one of said plurality of longitudinal positions along said belt; adjusting the transverse location of the image area on the belt to compensate for a difference between the detected first lateral position of said belt edge and the belt edge profile data related to said first one of said plurality of longitudinal positions; and determining when said longitudinally moving belt reaches a quasi steady state in said lateral deviation from linear travel by, calculating moving average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt passing adjacent said spatially fixed reference point for a predetermined number of belt cycles to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said reference point for said predetermined number of belt cycles, detecting a first lateral position data set of said belt during movement of the belt by measuring the lateral position of said belt edge at said plurality of longitudinal positions along said belt, calculating a plurality of difference data values by comparing said moving average belt edge profile data with said first lateral position data set for each of said plurality of longitudinal positions along said belt, and realizing said quasi steady state when each of said plurality of difference data values are within a predetermined value range.
Claim 9
Independent Claim
320 words
A method for transverse registration of an image area to be exposed on a longitudinally moving belt subject to lateral deviation from linear travel, said method comprising the steps of: providing belt edge profile data relating i) each of a plurality of longitudinal positions along said moving belt to ii) a lateral position of an edge of the belt with respect to a spatially fixed reference point; detecting a first lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge at a first one of said plurality of longitudinal positions along said belt; adjusting the transverse location of the image area on the belt to compensate for a difference between the detected first lateral position of said belt edge and the belt edge profile data related to said first one of said plurality of longitudinal positions; and determining when said longitudinally moving belt reaches a quasi steady state in said lateral deviation from linear travel by, calculating moving average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt passing adjacent said spatially fixed reference point for a predetermined number of belt cycles to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said reference point for said predetermined number of belt cycles, detecting a first lateral position data set of said belt during movement of the belt by measuring the lateral position of said belt edge at said plurality of longitudinal positions along said belt, calculating a plurality of difference data values by comparing said moving average belt edge profile data with said first lateral position data set for each of said plurality of longitudinal positions along said belt, and realizing said quasi steady state when each of said plurality of difference data values are within a predetermined value range.
Claim 10
Dependent Claim
167 words
The method for transverse registration of an image area according to claim 7 wherein: the step of providing said belt edge profile data includes the step, after realizing said quasi steady state, of providing moving average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt passing adjacent said spatially fixed reference point for a predetermined number of belt cycles to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said reference point for said predetermined number of belt cycles; and, the step of adjusting the transverse location of the image area includes the step, after realizing said quasi steady state, of adjusting the transverse location of the image area on the belt to compensate for a difference between the detected first lateral position of said belt edge and the moving average belt edge profile data related to said first one of said plurality of longitudinal positions.
Claim 11
Dependent Claim
92 words
The method for transverse registration of an image area according to claim 8 further comprising the steps, for each of said plurality of longitudinal positions along said belt, of: on-the-fly detecting a lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge from said spatially fixed reference point; and, on-the-fly adjusting the transverse location of the image area on the belt to compensate for a difference between the detected lateral position of said belt edge and the moving average belt edge profile data.
Claim 12
Independent Claim
169 words
A method for controlling a lateral position of a longitudinally moving endless belt subject to lateral deviation from linear travel, said method comprising the steps of: providing belt edge profile data relating i) each of a plurality of longitudinal positions along said moving belt to ii) a lateral position of an edge of the belt with respect to a spatially fixed reference point; detecting a first lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge at a first one of said plurality of longitudinal positions along said belt; generating a steering command signal by calculating a difference between the detected first lateral position of said belt edge and the belt edge profile data related to said first one of said plurality of longitudinal positions; and, adjusting the lateral positions of the belt in response to said steering command signal while simultaneously performing the detecting and generating steps, whereby continuous updating of the lateral position of the belt is achieved.
Claim 13
Independent Claim
169 words
A method for controlling a lateral position of a longitudinally moving endless belt subject to lateral deviation from linear travel, said method comprising the steps of: providing belt edge profile data relating i) each of a plurality of longitudinal positions along said moving belt to ii) a lateral position of an edge of the belt with respect to a spatially fixed reference point; detecting a first lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge at a first one of said plurality of longitudinal positions along said belt; generating a steering command signal by calculating a difference between the detected first lateral position of said belt edge and the belt edge profile data related to said first one of said plurality of longitudinal positions; and, adjusting the lateral positions of the belt in response to said steering command signal while simultaneously performing the detecting and generating steps, whereby continuous updating of the lateral position of the belt is achieved.
Claim 14
Dependent Claim
134 words
The method for controlling a lateral position of a longitudinally moving endless belt according to claim 10 wherein: the step of providing said belt edge profile data includes the step of providing average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt repeatedly passing adjacent said spatially fixed reference point to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said reference point; and, the step of generating said steering command signal includes the step of generating said steering command signal by calculating a difference between the detected first lateral position of said belt edge and the average belt edge profile data related to said first one of said plurality of longitudinal positions.
Claim 15
Dependent Claim
150 words
The method for controlling a lateral position of a longitudinally moving endless belt according to claim 11 wherein: the step of providing said average belt edge profile data includes the step of providing moving average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt passing adjacent said spatially fixed reference point for a predetermined number of belt cycles to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said reference point for said predetermined number of belt cycles; and, the step of generating said steering command signal includes the step of generating said steering command signal by calculating a difference between the detected first lateral position of said belt edge and the moving average belt edge profile data related to said first one of said plurality of longitudinal positions.
Claim 16
Independent Claim
315 words
A method for controlling a lateral position of a longitudinally moving endless belt subject to lateral deviation from linear travel, said method comprising the steps of: providing belt edge profile data relating i) each of a plurality of longitudinal positions along said moving belt to ii) a lateral position of an edge of the belt with respect to a spatially fixed reference point; detecting a first lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge at a first one of said plurality of longitudinal positions along said belt; adjusting the transverse location of the image area on the belt to compensate for a difference between the detected first lateral position of said belt edge and the belt edge profile data related to said first one of said plurality of longitudinal positions; and determining when said longitudinally moving belt reaches a quasi steady state in said lateral deviation from linear travel by, calculating moving average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt passing adjacent said spatially fixed reference point for a predetermined number of cycles to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said reference point for said predetermined number of belt cycles, detecting a first lateral position data set of said belt during movement of said belt by measuring the lateral position of said belt edge at said plurality of longitudinal positions along said belt, calculating a plurality of difference data values by comparing said moving average belt edge profile data with said first lateral position data set for each of said plurality of longitudinal positions along said belt, and realizing said quasi steady state when each of said plurality of difference data values are within a predetermined value range.
Claim 17
Independent Claim
315 words
A method for controlling a lateral position of a longitudinally moving endless belt subject to lateral deviation from linear travel, said method comprising the steps of: providing belt edge profile data relating i) each of a plurality of longitudinal positions along said moving belt to ii) a lateral position of an edge of the belt with respect to a spatially fixed reference point; detecting a first lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge at a first one of said plurality of longitudinal positions along said belt; adjusting the transverse location of the image area on the belt to compensate for a difference between the detected first lateral position of said belt edge and the belt edge profile data related to said first one of said plurality of longitudinal positions; and determining when said longitudinally moving belt reaches a quasi steady state in said lateral deviation from linear travel by, calculating moving average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt passing adjacent said spatially fixed reference point for a predetermined number of cycles to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said reference point for said predetermined number of belt cycles, detecting a first lateral position data set of said belt during movement of said belt by measuring the lateral position of said belt edge at said plurality of longitudinal positions along said belt, calculating a plurality of difference data values by comparing said moving average belt edge profile data with said first lateral position data set for each of said plurality of longitudinal positions along said belt, and realizing said quasi steady state when each of said plurality of difference data values are within a predetermined value range.
Claim 18
Dependent Claim
161 words
The method for controlling a lateral position of a longitudinally moving endless belt according to claim 13 further comprising the step of determining when said longitudinally moving belt reaches a quasi steady state in said lateral deviation from linear travel by: calculating moving average belt profile data relating i) each of said plurality of longitudinal positions along said belt passing adjacent said spatially fixed reference point for a predetermined number of belt cycles; detecting a first lateral position data set of said belt during movement of the belt by measuring the lateral position of said belt edge at said plurality of longitudinal positions along said belt; calculating a plurality of difference data values by comparing said moving average belt edge profile data with said first lateral position data set for each of said plurality of longitudinal positions along said belt; and, realizing said quasi steady state when each of said plurality of difference data values are within a predetermined value range.
Claim 19
Dependent Claim
161 words
The method for controlling a lateral position of a longitudinally moving endless belt according to claim 14 wherein: the step of providing said belt edge profile data includes the step, after realizing said quasi steady state, of providing moving average belt edge profile data relating i) each of said plurality of longitudinal positions along said belt passing adjacent said spatially fixed reference point for a predetermined number of belt cycles to ii) an average lateral position of said belt edge at each of said plurality of longitudinal positions along said belt with respect to said reference point for said predetermined number of belt cycles; and, the step of generating said steering command signal includes the step, after realizing said quasi steady state, of generating said steering command signal by calculating a difference between the detected first lateral position of said belt edge and the moving average belt edge profile data related to said first one of said plurality of longitudinal positions.
Claim 20
Dependent Claim
101 words
The method for controlling a lateral position of a longitudinally moving endless belt according to claim 15 further comprising the steps, for each of said plurality of longitudinal positions along said belt, of: on-the-fly detecting a lateral position of said belt during movement of the belt by measuring the lateral position of said belt edge from said fixed reference point; on-the-fly generating said steering command signal by calculating a difference between the detected lateral position of said belt edge and the moving average belt edge data; and, on-the-fly adjusting the lateral position of the belt in response to said steering command.
References Cited (Backward Citations)
US4135927A
Cited
US3957367A
Cited
US4188110A
Cited
US4370047A
Cited
US4236809A
Cited
US4403877A
Cited
US4336994A
Cited
US4403848A
Cited
US4557372A
Cited
US4965597A
Cited
US4833503A
Cited
US4961089A
Cited
US4959040A
Cited
US4977411A
Cited
US5266976A
Cited
US5053826A
Cited
US5119147A
Cited
US5225900A
Cited
US5208796A
Cited
US5153644A
Cited
US5200791A
Cited
US5227270A
Cited
US5146279A
Cited
US5287162A
Cited
US5373355A
Cited
US5229787A
Cited
US5248027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-23 | 1999-10-23 | 2000-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-23 | 2003-10-23 | 2004-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-23 | 2007-10-23 | 2008-04-23 | $7700.00 | Window Closed / Lapsed |