US5148218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus with a humidity detector
Assignee: Toshiba Corp
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Filing: 1991-06-25
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Granted: 1992-09-15
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Expires: 2011-06-25
Abstract
Abstract An image forming apparatus having a humidity detector which is detachably attached to the main apparatus body that accommodates an image forming member. The humidity detector detects a humidity in the vicinity of the image forming member, converts the detected humidity into a relative humidity and outputs it. Based on the value of the output relative humidity, image forming conditions, such as the amount of exposure, are set. The humidity detecting unit contains a time detecting unit for detecting the time for replacement.
Inventors
- 👤 Rintaro Nakane
- 👤 Jiro Egawa
- 👤 Naruhito Yoshida
- 👤 Toshihiro Kasai
- 👤 Kunihiko Miura
- 👤 Shinya Tomura
- 👤 Mitsuaki Kohyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:53
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5033; G03G15/5045
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
An image forming apparatus comprising: an image forming means for forming an image on an image bearing member; a humidity detecting unit detachably mounted to said image forming means for detecting the humidity in the vicinity of said image forming means and converting the detected humidity into a voltage value corresponding to the relative humidity; means for adjusting the image forming conditions of said image forming means in accordance with a relative humidity detected by said humidity detecting means; and time detecting means for detecting the time for replacement of said humidity detecting means.
Claim 2
Dependent Claim
94 words
An image forming apparatus comprising: an image forming means for forming an image on an image bearing member; a humidity detecting unit detachably mounted to said image forming means for detecting the humidity in the vicinity of said image forming means and converting the detected humidity into a voltage value corresponding to the relative humidity; means for adjusting the image forming conditions of said image forming means in accordance with a relative humidity detected by said humidity detecting means; and time detecting means for detecting the time for replacement of said humidity detecting means.
Claim 3
Dependent Claim
42 words
The image forming apparatus of claim 2, in which the time detecting means includes a battery connected to said humidity detecting means, the time for replacement of said humidity detecting means being determined from a voltage drop across the humidity detecting means.
Claim 4
Dependent Claim
37 words
The image forming apparatus of claim 1, in which the time detecting means includes a timer connected to the humidity detecting means to determine when the time for replacement of the humidity detecting means has been reached.
References Cited (Backward Citations)
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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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |