US4952986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying apparatus
Assignee: Sharp Corp
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Filing: 1989-03-29
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Granted: 1990-08-28
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Expires: 2009-03-29
Abstract
Abstract A copying apparatus having a prescanning function for obtaining density data to adjust copy parameters includes a correction function which eliminates the data obtained from a portion of a predetermined color, from the density data detected on a prescanning process. The density data can be restricted within a predetermined range. The predetermined range can be easily set by the user.
Inventors
- 👤 Yasutaka Maeda
- 👤 Hideyuki Nishimura
- 👤 Tsuyoshi Miyamoto
- 👤 Kyouichi Takata
- 👤 Kiyoshi Inamoto
- 👤 Kazuyuki Ohnishi
- 👤 Kazunori Sohda
- 👤 Yukihiko Ueno
- 👤 Taisuke Kamimura
- 👤 Yoichi Shimazawa
- 👤 Tokiyuki Okano
- 👤 Masato Tokishige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5025; G03G15/01
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
A copying apparatus comprising: a density detection device for detecting the density of an original to be copied, in a process of prescanning the original; adjusting means for adjusting at least one of the conditions of copying the original, on the basis of a group of detected density data; and correction means for eliminating the data obtained from a portion of a predetermined color from said group of detected density data.
Claim 2
Dependent Claim
71 words
A copying apparatus comprising: a density detection device for detecting the density of an original to be copied, in a process of prescanning the original; adjusting means for adjusting at least one of the conditions of copying the original, on the basis of a group of detected density data; and correction means for eliminating the data obtained from a portion of a predetermined color from said group of detected density data.
Claim 3
Dependent Claim
13 words
A copying apparatus according to claim 1, wherein said predetermined color is black.
Claim 4
Dependent Claim
101 words
A copying apparatus comprising: a density detection device for detecting the density of an original to be copied, in a process of prescanning the original; adjusting means for adjusting at least one of the conditions of copying the original, on the basis of the group of detected density data which exist between two predetermined values; detection means for detecting the density of a first reference original having a dark color and the density of a second reference original having a bright color; and density storage means for storing said two densities detected by said detection means as said two predetermined values.
Claim 5
Dependent Claim
101 words
A copying apparatus comprising: a density detection device for detecting the density of an original to be copied, in a process of prescanning the original; adjusting means for adjusting at least one of the conditions of copying the original, on the basis of the group of detected density data which exist between two predetermined values; detection means for detecting the density of a first reference original having a dark color and the density of a second reference original having a bright color; and density storage means for storing said two densities detected by said detection means as said two predetermined values.
Claim 6
Dependent Claim
94 words
A copying apparatus comprising: a density detection device for detecting the density of an original to be copied, in a process of prescanning the original; adjusting means for adjusting at least one of the conditions of copying the original, on the basis of a group of detected density data; judging means for judging whether density data obtained from portions of the original exist between two predetermined values or not; and correction means for eliminating, from said group of detected density data, extreme density data which exist beyond the range between said two predetermined values.
Claim 7
Dependent Claim
94 words
A copying apparatus comprising: a density detection device for detecting the density of an original to be copied, in a process of prescanning the original; adjusting means for adjusting at least one of the conditions of copying the original, on the basis of a group of detected density data; judging means for judging whether density data obtained from portions of the original exist between two predetermined values or not; and correction means for eliminating, from said group of detected density data, extreme density data which exist beyond the range between said two predetermined values.
Claim 8
Dependent Claim
34 words
An apparatus according to claim 4, wherein said correction means further eliminates density data which is obtained during a predetermined time period including the time when each of said extreme density data is obtained.
Claim 9
Dependent Claim
69 words
An image reading apparatus comprising: a density detection device for detecting the density of an image to be read, in a process of prescanning the image; adjusting means for adjusting at least one of the conditions of reading the image, on the basis of a group of detected density data; and correction means for eliminating the data obtained from a portion of a predetermined color, from detected density data.
Claim 10
Dependent Claim
69 words
An image reading apparatus comprising: a density detection device for detecting the density of an image to be read, in a process of prescanning the image; adjusting means for adjusting at least one of the conditions of reading the image, on the basis of a group of detected density data; and correction means for eliminating the data obtained from a portion of a predetermined color, from detected density data.
Claim 11
Dependent Claim
14 words
An image reading apparatus according to claim 6, wherein said predetermined color is black.
Claim 12
Dependent Claim
102 words
An image reading apparatus comprising: a density detection device for detecting the density of an image to be read, in a process of prescanning the image; adjusting means for adjusting at least one of the conditions of reading the image, on the basis of a group of detected density data which exist between two predetermined values; detection means for detecting the density of a first reference image having a dark color and the density of a second reference image having a bright color; and density storage means for storing said two densities detected by said detection means as said two predetermined values.
Claim 13
Dependent Claim
102 words
An image reading apparatus comprising: a density detection device for detecting the density of an image to be read, in a process of prescanning the image; adjusting means for adjusting at least one of the conditions of reading the image, on the basis of a group of detected density data which exist between two predetermined values; detection means for detecting the density of a first reference image having a dark color and the density of a second reference image having a bright color; and density storage means for storing said two densities detected by said detection means as said two predetermined values.
Claim 14
Dependent Claim
95 words
An image reading apparatus comprising: a density detection device for detecting the density of an image to be read, in a process of prescanning the image; adjusting means for adjusting at least one of the conditions of reading the image, on the basis of a group of detected density data; judging means for judging whether density data obtained from portions of the image exist between two predetermined values or not; and correction means for eliminating, from said group of detected density data, extreme density data which exist beyond the range between said two predetermined values.
Claim 15
Dependent Claim
95 words
An image reading apparatus comprising: a density detection device for detecting the density of an image to be read, in a process of prescanning the image; adjusting means for adjusting at least one of the conditions of reading the image, on the basis of a group of detected density data; judging means for judging whether density data obtained from portions of the image exist between two predetermined values or not; and correction means for eliminating, from said group of detected density data, extreme density data which exist beyond the range between said two predetermined values.
Claim 16
Dependent Claim
34 words
An apparatus according to claim 9, wherein said correction means further eliminates density data which is obtained during a predetermined time period including the time when each of said extreme density data is obtained.
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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) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |