Patent US6154628A successfully refreshed from Google Patents.
US6154628A
Expired / Lapsed
US
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Image forming device with misregistration correction achieved by photo-conductor speed controlled variation of latent image tilt
Assignee: Panasonic Holdings Corp
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Filing: 1998-09-14
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Granted: 2000-11-28
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Expires: 2018-09-14
Abstract
Abstract As the speed of a photoconductor drum 1a can be independently varied by providing a rotational speed adjustment mechanism to the photoconductor drum 1a, an inclined angle in a diagonal direction can be varied and as a result, misregistration can be adjusted. Also, exposure device with the inclination of a scanning line with the photoconductor drum 1a provided and control over correcting the inclination of the scanning line on the photoconductor drum 1a is executed by control over varying the peripheral speed of the photoconductor drum 1a. Hereby, a multiple image formation device wherein the configuration of color misregistration correction device is simplified is provided as an image formation device used for the output device of a computer and others.
Inventors
- 👤 Yuzo Kawano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:39
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/50; H04N1/506; G; G03; G03G; G03G15/00; G03G15/01; G03G15/0142; G03G15/0178; G03G15/0194; G03G2215/00; G03G2215/01; G03G2215/0103; G03G2215/0119; G03G2215/0122; G03G2215/0125; G03G2215/0132; G03G2215/0151; G03G2215/0158
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A multiple image formation device comprising: plural photoconductors; exposure means for radiating a light beam on said each photoconductor to form a latent image and scanning said photoconductor with a predetermined tilt relative to a perpendicular direction to a rotational direction of said photoconductor; plural developing means for respectively developing the latent image formed on said each photoconductor; transfer means for transferring the image developed by said developing means on a transfer material; and speed adjustment means for varying a rotational speed of said photoconductor so as to adjust the tilt of the latent image, wherein: a synthetic image is formed by sequentially overlapping the images developed on said each photoconductor on the transfer material.
Claim 2
Dependent Claim
115 words
A multiple image formation device comprising: plural photoconductors; exposure means for radiating a light beam on said each photoconductor to form a latent image and scanning said photoconductor with a predetermined tilt relative to a perpendicular direction to a rotational direction of said photoconductor; plural developing means for respectively developing the latent image formed on said each photoconductor; transfer means for transferring the image developed by said developing means on a transfer material; and speed adjustment means for varying a rotational speed of said photoconductor so as to adjust the tilt of the latent image, wherein: a synthetic image is formed by sequentially overlapping the images developed on said each photoconductor on the transfer material.
Claim 3
Dependent Claim
73 words
A multiple image formation device according to claim 1, wherein: said exposure means scans by sequentially radiating the light beam in a direction tilted by a predetermined quantity relative to the perpendicular direction to the rotational direction of said photoconductor; and in a relative position between said exposure means and said photoconductor, an end point of scanning is on a downstream side of a start point in the rotational direction of said photoconductor.
Claim 4
Dependent Claim
73 words
A multiple image formation device according to claim 1, wherein; said exposure means scans by sequentially radiating the light beam in a direction titled by a predetermined quantity relative to the perpendicular direction to the rotational direction of said photoconductor; and in a relative position between said exposure means and said photoconductor, an end point of scanning is on an upstream side of a start point in the rotational direction of said photoconductor.
References Cited (Backward Citations)
US4752804A
Cited
US4903067A
Cited
JPH01284870A
Cited
JPH06250474A
Cited
US5508789A
Cited
JPH08234532A
Cited
JPH09146329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-11-28 | 2004-05-29 | 2004-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-28 | 2008-05-29 | 2008-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-28 | 2012-05-29 | 2012-11-28 | $7700.00 | Window Closed / Lapsed |