US4823159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus
Assignee: Canon Inc
•
Filing: 1987-11-30
•
Granted: 1989-04-18
•
Expires: 2007-11-30
Abstract
Abstract An image forming apparatus includes an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward the image forming station; supporting device for supporting the rotatable member for displacement in a second direction which crosses the first direction; driving device for displacing the rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guide for guiding the sheet to the rotatable member, the guide being displaceable in the second direction together with the rotatable member.
Inventors
- 👤 Yasuyoshi Yamamoto
- 👤 Masashi Ohashi
- 👤 Tatsuya Shiratori
- 👤 Michiro Koike
- 👤 Atsushi Kubota
- 👤 Nobukazu Sasaki
- 👤 Akiyoshi Kimura
- 👤 Takashi Ozawa
- 👤 Toshirou Kasamura
- 👤 Toshihiko Kusumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:44
CPC Classifications
B; B65; B65H; B65H9/00; B65H9/16; B65H9/166; B65H9/20; G; G03; G03G; G03G15/00; G03G15/22; G03G15/23; G03G15/231; G03G15/232; G03G15/234; G03G15/65; G03G15/6555; G03G15/6558; G03G15/6561; G03G15/6564; B65H2404/00; B65H2404/10; B65H2404/14; B65H2404/142; B65H2404/1424; G03G15/235; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00405; G03G2215/00417; G03G2215/0043; G03G2215/00535; G03G2215/00556; G03G2215/00561; G03G2215/00565
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward said image forming station; supporting means for supporting said rotatable member for displacement in a second direction which traverses the first direction; driving means for displacing said rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guiding means for guiding the sheet to said rotatable member, said guiding means being displaceable in the second direction together with said rotatable member, wherein said rotatable member is disposed upstream of said image forming station with respect to transportation of the sheet and functions also as a registration roller to control timing of sheet transportation to said image forming station.
Claim 2
Dependent Claim
134 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward said image forming station; supporting means for supporting said rotatable member for displacement in a second direction which traverses the first direction; driving means for displacing said rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guiding means for guiding the sheet to said rotatable member, said guiding means being displaceable in the second direction together with said rotatable member, wherein said rotatable member is disposed upstream of said image forming station with respect to transportation of the sheet and functions also as a registration roller to control timing of sheet transportation to said image forming station.
Claim 3
Dependent Claim
23 words
An apparatus according to claim 1, wherein said inlet guiding means constitute a sheet guiding space which becomes narrower toward said rotatable member.
Claim 4
Dependent Claim
131 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward said image forming station; supporting means for supporting said rotatable member for displacement in a second direction which traverses the first direction; driving means for displacing said rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guiding means for guiding the sheet to said rotatable member, said guiding means being displaceable in said second direction together with said rotatable member and movable to open a sheet passage constituted thereby, wherein said rotatable member is movable in a third direction to open the sheet passage defined in association with rotation of said inlet guiding means.
Claim 5
Dependent Claim
131 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward said image forming station; supporting means for supporting said rotatable member for displacement in a second direction which traverses the first direction; driving means for displacing said rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guiding means for guiding the sheet to said rotatable member, said guiding means being displaceable in said second direction together with said rotatable member and movable to open a sheet passage constituted thereby, wherein said rotatable member is movable in a third direction to open the sheet passage defined in association with rotation of said inlet guiding means.
Claim 6
Dependent Claim
120 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward said image forming station; supporting means for supporting said rotatable member for displacement in a second direction which traverses the first direction; driving means for displacing said rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guiding means for guiding the sheet to said rotatable member, said guiding means being displaceable in said second direction together with said rotatable member and movable to open a sheet passage constituted thereby, wherein said inlet guiding means is rotatable about an axis of said rotatable member.
Claim 7
Dependent Claim
120 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward said image forming station; supporting means for supporting said rotatable member for displacement in a second direction which traverses the first direction; driving means for displacing said rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guiding means for guiding the sheet to said rotatable member, said guiding means being displaceable in said second direction together with said rotatable member and movable to open a sheet passage constituted thereby, wherein said inlet guiding means is rotatable about an axis of said rotatable member.
Claim 8
Dependent Claim
125 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward said image forming station; supporting means for supporting said rotatable member for displacement in a second direction which traverses the first direction; driving means for displacing said rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guiding means for guiding the sheet to said rotatable member, said guiding means being displaceable in the second direction together with said rotatable member and movable to open a sheet passage constituted thereby, wherein said inlet guide means is rotatable about a shaft supported on a frame of said image forming apparatus.
Claim 9
Dependent Claim
125 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a rotatable member for transferring the sheet in a first direction toward said image forming station; supporting means for supporting said rotatable member for displacement in a second direction which traverses the first direction; driving means for displacing said rotatable member in the second direction to correct deviation of the sheet in the second direction; and inlet guiding means for guiding the sheet to said rotatable member, said guiding means being displaceable in the second direction together with said rotatable member and movable to open a sheet passage constituted thereby, wherein said inlet guide means is rotatable about a shaft supported on a frame of said image forming apparatus.
Claim 10
Dependent Claim
108 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a registration roller, disposed upstream of said image forming station with respect to transportation of the sheet, for feeding the sheet in a timed relation with an image formed on an image bearing member of said image forming station so as to align the sheet with the image; supporting means for supporting said registration roller for displacement in a direction which crosses a direction of the transportation of the sheet; and driving means for displacing said registration roller in the crossing direction to correct deviation of the sheet in the crossing direction.
Claim 11
Dependent Claim
108 words
An image forming apparatus, comprising: an image forming station for forming an image on a sheet; a registration roller, disposed upstream of said image forming station with respect to transportation of the sheet, for feeding the sheet in a timed relation with an image formed on an image bearing member of said image forming station so as to align the sheet with the image; supporting means for supporting said registration roller for displacement in a direction which crosses a direction of the transportation of the sheet; and driving means for displacing said registration roller in the crossing direction to correct deviation of the sheet in the crossing direction.
Claim 12
Dependent Claim
68 words
An apparatus according to claim 6, further comprising a feeding passage for feeding the sheet to said registration roller, a refeeding passage for refeeding the sheet on which the image has been formed after being fed by said feeding passage, toward said image forming station, wherein said registration roller is effective to align the refed sheet in the direction of sheet transportation and also in the crossing direction.
References Cited (Backward Citations)
US4058359A
Cited
DE2810294A1
Cited
US4187024A
Cited
DE2922977A1
Cited
US4260242A
Cited
DE2924489A1
Cited
US4281244A
Cited
US4334759A
Cited
US4419003A
Cited
US4397538A
Cited
US4408866A
Cited
US4685664A
Cited
US4511242A
Cited
GB2141695A
Cited
US4607942A
Cited
US4519700A
Cited
JPH0614250A
Cited
JPH09177237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |