US Patent No: 6,637,329
Number of patents in Portfolio can not be more than 2000
Method for improving registration of images on opposing sides of a printing medium
Stats
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Oct 28, 2003
Issued date -
May 15, 2001
filing date -
09/710,125
serial no -
In Force
status
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Abstract
The present invention is a method to generate alignable orthogonal images from non-orthogonal scans in a double-sided digital-offset-press arrangement by shifting the image data in the multi-channel modulators in a direction and rate that keeps the images orthogonal. The image data is shifted parallel to the cylinder axes and the amount of shift per cylinder rotation equals the distance the multi-channel modulators move relative to their respective cylinders per rotation of the relevant cylinder. This prevents "parallelogram" type distortion in the images and maintains the orthogonality of the original images, thereby allowing the images on the opposing sides of the printing medium to be aligned. The shift can be done continuously or in discrete steps. The invention is also extendable to two-dimensional modulators such as deformable mirror devices (DMD) and liquid crystal light valves (LCLV).
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,743,091 Two dimensional laser diode array | 116 | 1986 | |
| 5,049,901 Light modulator using large area light sources | 103 | 1990 | |
| 5,132,723 Method and apparatus for exposure control in light valves | 87 | 1991 | |
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| 4,577,932 Multi-spot modulator using a laser diode | 74 | 1984 | |
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| 4,591,880 Method of correcting distortion of an image reproduced by an image reproducing system | 16 | 1983 | |
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| 6,252,241 Rotational scanning image recording system having both a large format and high resolution | 6 | 1998 | |
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| 4,745,487 Helical scanning apparatus with one or more rows of scanning elements and an object of scanning disposed at an angle to the axis of a rotating drum to eliminate skew of scanning lines | 14 | 1985 | |
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| 5,163,368 Printing apparatus with image error correction and ink regulation control | 39 | 1991 | |
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| 5,174,205 Controller for spark discharge imaging | 24 | 1991 | |
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| 4,801,950 Multi-beam roller phototracer | 28 | 1987 | |
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| 4,441,791 Deformable mirror light modulator | 589 | 1982 | |
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| 4,819,018 High-speed broad-brush laser photocomposition | 17 | 1986 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 28, 2015 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |