US4145965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rollers for fixing a developed image in an electrophotographic copying machine
Assignee: Sharp Corp
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Filing: 1977-04-27
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Granted: 1979-03-27
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Expires: 1997-04-27
Abstract
Abstract A pair of metal rollers to which a predetermined pressure is applied are provided in an electrophotographic copying machine for fixing a developed image carried on a copy paper driven to travel through said pair of metal rollers. At least one of said rollers is slightly inclined with respect to a line perpendicular to a transportation direction of the copy paper in order to stabilize the fixing operation. In a preferred form, both of said rollers are slightly inclined in counter directions to each other with respect to the line perpendicular to the transportation direction of the copy paper.
Inventors
- 👤 Masayuki Kikuchi
- 👤 Susumu Houjyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:31
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2092
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
An electrophotographic copying machine wherein a developed image carried on a copy paper is fixed while the copy paper travels through a fixing section, said fixing section comprising: a pair of cylinder shaped fixing rollers at least one of which is slightly inclined with respect to a line perpendicular to a travel direction of the copy paper by a fixed angle; a stationary housing for rotatably supporting one of said pair of cylinder shaped fixing rollers; drive means for rotating said one of the fixing rollers at a predetermined velocity; a movable housing for rotatably supporting the other cylinder shaped fixing roller, said movable housing being rotatable around one end thereof with respect to said stationary housing in such a manner to vary the distance between said pair of fixing rollers; and depression means provided at the other end of said movable housing for creating a predetermined pressure between said pair of cylinder shaped fixing rollers, wherein the copy paper is driven to travel through said pair of fixing rollers.
Claim 2
Dependent Claim
170 words
An electrophotographic copying machine wherein a developed image carried on a copy paper is fixed while the copy paper travels through a fixing section, said fixing section comprising: a pair of cylinder shaped fixing rollers at least one of which is slightly inclined with respect to a line perpendicular to a travel direction of the copy paper by a fixed angle; a stationary housing for rotatably supporting one of said pair of cylinder shaped fixing rollers; drive means for rotating said one of the fixing rollers at a predetermined velocity; a movable housing for rotatably supporting the other cylinder shaped fixing roller, said movable housing being rotatable around one end thereof with respect to said stationary housing in such a manner to vary the distance between said pair of fixing rollers; and depression means provided at the other end of said movable housing for creating a predetermined pressure between said pair of cylinder shaped fixing rollers, wherein the copy paper is driven to travel through said pair of fixing rollers.
Claim 3
Dependent Claim
14 words
The electrophotographic copying machine of claim 1, wherein the predetermined pressure is about 30kg/cm.
Claim 4
Dependent Claim
20 words
The electrophotographic copying machine of claim 1, wherein the first and second cylinder shaped rollers are made of hardened steel.
Claim 5
Dependent Claim
171 words
An electrophotographic copying machine wherein a developed image carried on a copy paper is fixed while the copy paper travels through a fixing section, said fixing section comprising: a first cylinder shaped roller; means for rotatably supporting the first cylinder shaped roller in such a manner that an axis of the first cylinder shaped roller is slightly inclined with respect to a line perpendicular to a travel direction of the copy paper by a fixed angle; means for rotating the first cylinder shaped roller at a constant velocity; a second cylinder shaped roller confronting said first cylinder shaped roller; means for rotatably supporting the second cylinder shaped roller in such a manner that an axis of the second cylinder shaped roller is slightly inclined with respect to the line perpendicular to the travel direction of the copy paper by a fixed angle in the counter direction to the first cylinder shaped roller; and means for depressing the second cylinder shaped roller to the first cylinder shaped roller at a predetermined pressure.
Claim 6
Dependent Claim
171 words
An electrophotographic copying machine wherein a developed image carried on a copy paper is fixed while the copy paper travels through a fixing section, said fixing section comprising: a first cylinder shaped roller; means for rotatably supporting the first cylinder shaped roller in such a manner that an axis of the first cylinder shaped roller is slightly inclined with respect to a line perpendicular to a travel direction of the copy paper by a fixed angle; means for rotating the first cylinder shaped roller at a constant velocity; a second cylinder shaped roller confronting said first cylinder shaped roller; means for rotatably supporting the second cylinder shaped roller in such a manner that an axis of the second cylinder shaped roller is slightly inclined with respect to the line perpendicular to the travel direction of the copy paper by a fixed angle in the counter direction to the first cylinder shaped roller; and means for depressing the second cylinder shaped roller to the first cylinder shaped roller at a predetermined pressure.
Claim 7
Dependent Claim
42 words
The electrophotographic copying machine of claim 4, wherein the first and second cylinder shaped rollers are inclined by the same angle with respect to the line perpendicular to the travel direction of the copy paper in the counter directions to each other.
Claim 8
Dependent Claim
47 words
The electrophotographic copying machine of claim 5, wherein the first and second cylinder shaped rollers are inclined in the counter directions to each other by an angle of a half degrees (1/2°) with respect to the line perpendicular to the travel direction of the copy paper, respectively.
Claim 9
Dependent Claim
14 words
The electrophotographic copying machine of claim 4, wherein the predetermined pressure is about 30kg/cm.
Claim 10
Dependent Claim
20 words
The electrophotographic copying machine of claim 4, wherein the first and second cylinder shaped rollers are made of hardened steel.
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |