US4566547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remaining amount indicator
Assignee: Canon Inc
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Filing: 1984-03-21
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Granted: 1986-01-28
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Expires: 2004-03-21
Abstract
Abstract A remaining amount indicator for indicating remaining amount of consuming material such as papers, toner, web or silicone oil in a recording apparatus such as a copying machine or a laser beam printer is disclosed. The remaining amount detected by a detector is displayed by a display in a first display mode until the remaining amount reaches a predetermined level, and in a second display mode after the remaining amount has reached the predetermined level. Further, the quantity of the display is reduced as the remaining amount decreases.
Inventors
- 👤 Hideaki Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:01
CPC Classifications
G; G01; G01G; G01G19/00; G01G19/52
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
93 words
A remaining amount indicator comprising: detecting means for detecting a remaining amount of recording paper by sensing a position of a loading member on which the recording paper is loaded, wherein said position varies in accordance with the amount of recording paper on said loading member; display means for displaying the remaining amount of recording paper; and control means for controlling said display means in accordance with the output of said detecting means so that said display means performs a progressive display of the remaining amount of recording paper on said loading member.
Claim 2
Dependent Claim
93 words
A remaining amount indicator comprising: detecting means for detecting a remaining amount of recording paper by sensing a position of a loading member on which the recording paper is loaded, wherein said position varies in accordance with the amount of recording paper on said loading member; display means for displaying the remaining amount of recording paper; and control means for controlling said display means in accordance with the output of said detecting means so that said display means performs a progressive display of the remaining amount of recording paper on said loading member.
Claim 3
Dependent Claim
47 words
An indicator according to claim 1, wherein said display means includes a plurality of display elements, and said control means controls said display means to selectively turn on said plurality of display elements in accordance with the remaining amount of recording paper detected by said detecting means.
Claim 4
Dependent Claim
29 words
An indicator according to claim 1, wherein said control means causes said display means to operate in plural display modes in accordance with the output of said detecting means.
Claim 5
Dependent Claim
44 words
An indicator according to claim 3, wherein said plural display modes include a first display mode wherein the display amount of said display means is decreased in accordance with decrease of the remaining amount of recording paper until it reaches a first predetermined amount.
Claim 6
Dependent Claim
44 words
An indicator according to claim 4, wherein said plural display modes include a second display mode wherein said display means provides on and off display after the remaining amount of recording paper reaches the first predetermined amount until it reaches a second predetermined amount.
Claim 7
Dependent Claim
23 words
An indicator according to claim 4 or 5, wherein said first predetermined amount represents that the remaining amount of recording paper is small.
Claim 8
Dependent Claim
25 words
An indicator according to claim 5, wherein said display means performs display with the same display color in both the first and second display modes.
Claim 9
Dependent Claim
48 words
An indicator according to claim 5, wherein said plural display modes include a third display mode in which said display means performs display with a color different from that in the first or second display mode after the remaining amount of recording paper reaches the second predetermined amount.
Claim 10
Dependent Claim
23 words
An indicator according to claim 5 or 8, wherein said second predetermined amount represents that the remaining amount of recording paper is zero.
Claim 11
Dependent Claim
20 words
An indicator according to claim 8, wherein said display means performs on and off display in the third display mode.
Claim 12
Dependent Claim
26 words
An indicator according to claim 5, wherein said display means performs on and off display with a plurality of display colors in the second display mode.
Claim 13
Dependent Claim
30 words
An indicator according to claim 5 or 11, wherein said display means reduces the display amount in accordance with the remaining amount of recording paper in the second display mode.
References Cited (Backward Citations)
US3930258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |