US4947472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus with roll-type recording material
Assignee: Minolta Co Ltd
•
Filing: 1988-08-31
•
Granted: 1990-08-07
•
Expires: 2008-08-31
Abstract
Abstract An image forming apparatus for forming images on a roll of recording material, comprising a case accommodating the roll of recording material which is drawn out therefrom. A movable member is disposed within the case and is movable in accordance with the decrease of the radius of the roll. A detectable member attached to the movable member and a detecting member provided outside of the case are for detecting that the detectable member has been brought to a predetermined position by the movement of the movable member when the radius of the roll has reached a predetermined value. The movable member has a length permitting the forward end of the member to move away from the outermost surface of the roll when the radius of the roll has reached the predetermined value.
Inventors
- 👤 Yutaka Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:34
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/587; G03B27/588
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
170 words
In an image forming apparatus for forming images on a roll of recording material, an apparatus for detecting when the radius of said roll of recording material has reached a predetermined value, said apparatus comprising: a case accommodating said roll of recording material for having said recording material drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case, said movable member having means for spring-biasing said member against the outermost surface of said roll so that said movable member is movable in accordance with changes in the radius of said roll, said movable member having a length permitting the forward end of said member to move away from the outermost surface of said roll when the radius of said roll reaches a predetermined value; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 2
Dependent Claim
170 words
In an image forming apparatus for forming images on a roll of recording material, an apparatus for detecting when the radius of said roll of recording material has reached a predetermined value, said apparatus comprising: a case accommodating said roll of recording material for having said recording material drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case, said movable member having means for spring-biasing said member against the outermost surface of said roll so that said movable member is movable in accordance with changes in the radius of said roll, said movable member having a length permitting the forward end of said member to move away from the outermost surface of said roll when the radius of said roll reaches a predetermined value; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 3
Dependent Claim
24 words
An image forming apparatus as claimed in claim 1 wherein said detecting means is a reed switch and said detectable means is a magnet.
Claim 4
Dependent Claim
122 words
In an image forming apparatus for forming images on a roll of recording material, an apparatus for detecting when the radius of said roll of recording material has reached a predetermined value, said apparatus comprising: a case accommodating said roll of recording material such that said recording material can be drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case such that said member is movable in accordance with changes in the radius of said roll; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 5
Dependent Claim
122 words
In an image forming apparatus for forming images on a roll of recording material, an apparatus for detecting when the radius of said roll of recording material has reached a predetermined value, said apparatus comprising: a case accommodating said roll of recording material such that said recording material can be drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case such that said member is movable in accordance with changes in the radius of said roll; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 6
Dependent Claim
48 words
An image forming apparatus as claimed in claim 3, wherein said movable member contacts said roll, and has a length permitting the forward end of said member to move away from the outermost surface of said roll when the radius of said roll has reached a predetermined value.
Claim 7
Dependent Claim
24 words
An image forming apparatus as claimed in claim 3, and further comprising means for spring-biasing said movable member against the surface of said roll.
Claim 8
Dependent Claim
24 words
An image forming apparatus as claimed in claim 3, wherein said detecting means is a reed switch and said detectable means is a magnet.
Claim 9
Dependent Claim
15 words
An image forming apparatus as claimed in claim 3, wherein said recording material has photosensitivity.
Claim 10
Dependent Claim
102 words
In an image forming apparatus for forming images on a recording material, an apparatus comprising: a case accommodating said recording material such that said recording material can be drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case such that said member is movable in accordance with a decrease in the amount of said recording material; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 11
Dependent Claim
102 words
In an image forming apparatus for forming images on a recording material, an apparatus comprising: a case accommodating said recording material such that said recording material can be drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case such that said member is movable in accordance with a decrease in the amount of said recording material; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 12
Dependent Claim
52 words
An image forming apparatus as claimed in claim 8, wherein said movable member contacts said recording material, and has a length permitting the forward end of said movable member to move away from the outermost surface of said recording material when the amount of the recording material has reached said predetermined value.
Claim 13
Dependent Claim
25 words
An image forming apparatus as claimed in claim 11, and further comprising means for spring-biasing said movable member against the surface of said recording material.
Claim 14
Dependent Claim
24 words
An image forming apparatus as claimed in claim 8, wherein said detecting means is a reed switch and said detectable means is a magnet.
Claim 15
Dependent Claim
15 words
An image forming apparatus as claimed in claim 8, wherein said recording material has photosensitivity.
Claim 16
Independent Claim
100 words
An apparatus for detecting the remaining amount of a rolled material, said apparatus comprising: a case accommodating said rolled material such that said rolled material can be drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case such that said member is movable in accordance with changes in the radius of said rolled material; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 17
Independent Claim
100 words
An apparatus for detecting the remaining amount of a rolled material, said apparatus comprising: a case accommodating said rolled material such that said rolled material can be drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case such that said member is movable in accordance with changes in the radius of said rolled material; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 18
Dependent Claim
48 words
An apparatus as claimed in claim 13, wherein said movable member contacts said rolled material and, has a length permitting the forward end of said member to move away from the outermost surface of said rolled material when the radius of said rolled material reaches a predetermined value.
Claim 19
Dependent Claim
25 words
An image forming apparatus as claimed in claim 16, and further comprising means for spring-biasing said movable member against the surface of said rolled material.
Claim 20
Dependent Claim
22 words
An apparatus as claimed in claim 13, wherein said detecting means is a reed switch and said detectable means is a magnet.
Claim 21
Dependent Claim
13 words
An apparatus as claimed in claim 13, wherein said rolled material has photosensitivity.
Claim 22
Independent Claim
94 words
An apparatus for detecting a remaining amount of a material, said apparatus comprising: a case accommodating said material such that said material can be drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case such that said member is movable in accordance with the decrease of said material; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 23
Independent Claim
94 words
An apparatus for detecting a remaining amount of a material, said apparatus comprising: a case accommodating said material such that said material can be drawn out therefrom; a mount portion for removably supporting said case thereon; a movable member movably disposed within said case such that said member is movable in accordance with the decrease of said material; a detectable member attached to said movable member; and a detecting means provided on said mount portion for detecting that said detectable member has been brought to a predetermined position by movement of said movable member.
Claim 24
Dependent Claim
46 words
An apparatus as claimed in claim 18, wherein said movable member contacts said material, and has a length permitting the forward end of said member to move away from the outermost surface of said material when the amount of said material has reached a predetermined value.
Claim 25
Dependent Claim
24 words
An image forming apparatus as claimed in claim 18, and further comprising means for spring-biasing said movable member against the surface of said material.
Claim 26
Dependent Claim
22 words
An apparatus as claimed in claim 18, wherein said detecting means is a reed switch and said detectable means is a magnet.
Claim 27
Dependent Claim
12 words
An apparatus as claimed in claim 18, wherein said material has photosensitivity.
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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |