US5091789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicolor image forming apparatus
Assignee: Konica Minolta Inc
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Filing: 1991-05-22
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Granted: 1992-02-25
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Expires: 2011-05-22
Abstract
Abstract The invention provides an apparatus for forming a latent image on a photoreceptor. In the apparatus, there are provided an image reader including a scanning device for performing a reciprocal movement along an original document, a reading device for reading an image on the original document and for outputting an image signal in the outward movement of the scanning device, and a memory for storing the image signal; and an image writing device for writing a latent image on the photoreceptor. The image writing device has a first writing mode in which a latent image corresponding to the image signal outputted from the reading device is written in synchronization with the outward movement of the scanning device, and a second writing mode in which a latent image corresponding to the image signal outputted from the memory is written. The scanning device is adapted to perform the backward movement in the second writing mode.
Inventors
- 👤 Satoshi Haneda
- 👤 Masakazu Fukuchi
- 👤 Hisashi Shoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:29
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/0402; H04N1/0405; H04N1/042; H04N1/0443; H04N1/46; H04N1/50; H04N1/506; H04N1/508; H04N1/113; H04N1/1135; H04N1/12; H04N2201/00; H04N2201/04; H04N2201/047; H04N2201/04753; H04N2201/04755
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
199 words
A method for reproducing a color image on a document on a recording sheet, comprising the steps of: providing an image reading means for generating a plurality of color component signals corresponding to the color image; moving the image reading means along the document in an outward direction from an initial position to photoelectrically read the color image while an image carrying means, having a rotatable endless imaging surface, rotates through a first rotation; writing a first color component image, corresponding to a first one of the plurality of color component signals, onto the imaging surface while the image carrying means rotates through the first rotation; storing a second one of the plurality of color component signals in a memory means while the image carrying means rotates through the first rotation; moving the image reading means in a backward direction to the initial position without reading the color image while the image carrying means rotates through a second rotation; and writing a second color component image, corresponding to the second one of the plurality of color component signals which is stored in the memory means, onto the imaging surface while the image carrying means rotates through the second rotation.
Claim 2
Independent Claim
199 words
A method for reproducing a color image on a document on a recording sheet, comprising the steps of: providing an image reading means for generating a plurality of color component signals corresponding to the color image; moving the image reading means along the document in an outward direction from an initial position to photoelectrically read the color image while an image carrying means, having a rotatable endless imaging surface, rotates through a first rotation; writing a first color component image, corresponding to a first one of the plurality of color component signals, onto the imaging surface while the image carrying means rotates through the first rotation; storing a second one of the plurality of color component signals in a memory means while the image carrying means rotates through the first rotation; moving the image reading means in a backward direction to the initial position without reading the color image while the image carrying means rotates through a second rotation; and writing a second color component image, corresponding to the second one of the plurality of color component signals which is stored in the memory means, onto the imaging surface while the image carrying means rotates through the second rotation.
Claim 3
Dependent Claim
87 words
The method of claim 1, wherein the step of writing the first color component image includes a step of writing the first color component image onto the imaging surface twice while the image carrying means rotates through the first rotation and the step of writing the second color component image includes a step of writing the second color component image onto the imaging surface twice while the image carrying means rotates through the second rotation, to form two copies of the color image on the imaging surface.
Claim 4
Independent Claim
269 words
A method for reproducing a color image on a document on a recording sheet, comprising the steps of: providing an image reading means for generating a plurality of color component signals corresponding to the color image; moving the image reading means along the document in an outward direction from an initial position to photoelectrically read the color image while an image carrying means, having a rotatable endless imaging surface, rotates through a first half rotation; moving the image reading means in a backward direction to the initial position without reading the color image while the image carrying means rotates through a second half rotation; writing a first color component image, corresponding to a first one of the plurality of color component signals, onto the imaging surface while the image carrying means rotates through the first half rotation; storing the first one and a second one of the plurality of color component signals in a memory means while the image carrying means rotates through the first half rotation; writing the first color component image, corresponding to the first one of the plurality of color component signals which is stored in the memory means, onto the imaging surface while the image carrying means rotates through the second half rotation; writing a second color component image, corresponding to the second one of the plurality of color component signals which is stored in the memory means, onto the imaging surface while the image carrying means rotates through another first half rotation; and writing the second color component image onto the imaging surface while the image carrying means rotates through another second half rotation.
Claim 5
Independent Claim
269 words
A method for reproducing a color image on a document on a recording sheet, comprising the steps of: providing an image reading means for generating a plurality of color component signals corresponding to the color image; moving the image reading means along the document in an outward direction from an initial position to photoelectrically read the color image while an image carrying means, having a rotatable endless imaging surface, rotates through a first half rotation; moving the image reading means in a backward direction to the initial position without reading the color image while the image carrying means rotates through a second half rotation; writing a first color component image, corresponding to a first one of the plurality of color component signals, onto the imaging surface while the image carrying means rotates through the first half rotation; storing the first one and a second one of the plurality of color component signals in a memory means while the image carrying means rotates through the first half rotation; writing the first color component image, corresponding to the first one of the plurality of color component signals which is stored in the memory means, onto the imaging surface while the image carrying means rotates through the second half rotation; writing a second color component image, corresponding to the second one of the plurality of color component signals which is stored in the memory means, onto the imaging surface while the image carrying means rotates through another first half rotation; and writing the second color component image onto the imaging surface while the image carrying means rotates through another second half rotation.
Claim 6
Independent Claim
248 words
A method for producing a color image on the recording sheet by superposing reproductions of a color image on a first document and a color image on a second document, comprising the steps of: scanning the first document with an image reading means for generating a plurality of first color component signals corresponding to the color image on the first document; storing the first color component signals in a memory means; scanning the second document with an image reading means for generating a plurality of second color component signals corresponding to the color image on the second document, the step of scanning the second document including the step of moving the image reading means along the second document in an outward direction from an initial position to photoelectrically read the color image of the second document while an image carrying means, having a rotatable endless imaging surface, rotates through a first rotation; writing a second color component image, corresponding to one of the second color component signals, onto the imaging surface while the image carrying means rotates through the first rotation; moving the image reading means in a backward direction to the initial position without reading the color image of the second document while the image carrying means rotates through a second rotation; and writing a first color component image, corresponding to one of the first color component signals stored in the memory means, onto the imaging surface while the image carrying means rotates through the second rotation.
Claim 7
Independent Claim
248 words
A method for producing a color image on the recording sheet by superposing reproductions of a color image on a first document and a color image on a second document, comprising the steps of: scanning the first document with an image reading means for generating a plurality of first color component signals corresponding to the color image on the first document; storing the first color component signals in a memory means; scanning the second document with an image reading means for generating a plurality of second color component signals corresponding to the color image on the second document, the step of scanning the second document including the step of moving the image reading means along the second document in an outward direction from an initial position to photoelectrically read the color image of the second document while an image carrying means, having a rotatable endless imaging surface, rotates through a first rotation; writing a second color component image, corresponding to one of the second color component signals, onto the imaging surface while the image carrying means rotates through the first rotation; moving the image reading means in a backward direction to the initial position without reading the color image of the second document while the image carrying means rotates through a second rotation; and writing a first color component image, corresponding to one of the first color component signals stored in the memory means, onto the imaging surface while the image carrying means rotates through the second rotation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |