US5239347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus having recording material carrying member and movable assisting member
Assignee: Canon Inc
•
Filing: 1991-10-09
•
Granted: 1993-08-24
•
Expires: 2011-10-09
Abstract
Abstract An image forming apparatus includes an image bearing member; a recording material carrying member for carrying a recording material; an image transfer device for transferring an image from the image bearing member to the recording material carried on the recording material carrying member; an assisting member for assisting the recording material to be carried on the recording material carrying member, the assisting member being movable to and away from the recording material carrying member; wherein the assisting member is in contact with the recording material carrying member after completion of an image forming operation and before start of next image forming operation.
Inventors
- 👤 Shinichi Onodera
- 👤 Kiyoharu Tanaka
- 👤 Hajime Suzuki
- 👤 Koji Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:24
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/165; G03G15/1655; G03G15/01; G03G15/0105; G03G15/0131; G03G2215/00; G03G2215/01; G03G2215/0151; G03G2215/0154; G03G2215/0167; G03G2215/0174; G03G2215/018
Claims Analysis
Total Claims: 83
Claim 1
Independent Claim
160 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting at a carrying position the recording material to be carried on said recording material carrying member, said assisting member being movable to and away from said sheet; and charging means disposed with said sheet between said charging means and said assisting member, said charging means for attracting the recording material to said sheet, wherein said assisting member contacts said sheet for at least a part of a period in which an image transfer operation is being completed, which is after the recording material passes by said carrying position and which is before a next recording material is carried on said carrying member.
Claim 2
Dependent Claim
160 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting at a carrying position the recording material to be carried on said recording material carrying member, said assisting member being movable to and away from said sheet; and charging means disposed with said sheet between said charging means and said assisting member, said charging means for attracting the recording material to said sheet, wherein said assisting member contacts said sheet for at least a part of a period in which an image transfer operation is being completed, which is after the recording material passes by said carrying position and which is before a next recording material is carried on said carrying member.
Claim 3
Dependent Claim
53 words
An apparatus according to claim 1, wherein said assisting member keeps in contact with said sheet during a period in which an image transfer operation is being completed, which is after the recording material passes by said carrying position and which is before a next recording material is carried on said carrying member.
Claim 4
Dependent Claim
25 words
An apparatus according to claim 1, further comprising an urging member for urging the sheet, said urging member and said assisting member sandwiches the sheet.
Claim 5
Dependent Claim
19 words
An apparatus according to claim 3, wherein said urging member is at a position faced to said assisting member.
Claim 6
Dependent Claim
14 words
An apparatus according to claim 3, wherein said urging member is an elastic sheet.
Claim 7
Dependent Claim
20 words
An apparatus according to claim 3, wherein when said assisting member contacts said sheet, said urging member contacts said sheet.
Claim 8
Dependent Claim
25 words
An apparatus according to claim 1, wherein when said recording material carrying member is at rest, said assisting member is in contact with said sheet.
Claim 9
Dependent Claim
59 words
An apparatus according to claim 1, wherein when the recording material from a sheet supply station is carried on said recording material carrying member, said assisting member urges the recording material to said sheet, and after a trailing edge of the recording material is carried on said recording material carrying member, said assisting member is separated from said sheet.
Claim 10
Dependent Claim
17 words
An apparatus according to claim 1, wherein said assisting member is in the form of a roller.
Claim 11
Dependent Claim
40 words
An apparatus according to claim 1, wherein said apparatus is capable of forming plural color toner images on said image bearing member, and the toner images are sequentially transferred onto the recording material carried on said recording material carrying member.
Claim 12
Dependent Claim
33 words
An apparatus according to claim 10, wherein the toner images include yellow, magenta, cyan and black toner images, which are fixed by image fixing means into a full-color image on the recording material.
Claim 13
Dependent Claim
20 words
An apparatus according to claim 1, wherein said recording material carrying member is in the form of a rotatable drum.
Claim 14
Dependent Claim
19 words
An apparatus according to claim 3, wherein said urging member is disposed inside of said recording material carrying member.
Claim 15
Dependent Claim
18 words
An apparatus according to claim 13, wherein said assisting member is disposed below said recording material carrying member.
Claim 16
Dependent Claim
45 words
An apparatus according to claim 1, wherein said assisting member contacts said sheet at least a part of a period which is after the image is fixed on the recording material and which is before a next recording material is carried on said carrying member.
Claim 17
Dependent Claim
44 words
An apparatus according to claim 15, wherein said assisting member keeps in contact with said sheet during a period which is after the image is fixed on the recording material and which is before a next recording material is carried on said carrying member.
Claim 18
Dependent Claim
126 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting the recording material to be carried on said recording material carrying member, said assisting member being movable to and away from said sheet; and charging means disposed with said sheet between said charging means and said assisting member, said charging means for attracting the recording material to said sheet, wherein said assisting member is in contact with said sheet when said recording material carrying member is at rest.
Claim 19
Dependent Claim
126 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting the recording material to be carried on said recording material carrying member, said assisting member being movable to and away from said sheet; and charging means disposed with said sheet between said charging means and said assisting member, said charging means for attracting the recording material to said sheet, wherein said assisting member is in contact with said sheet when said recording material carrying member is at rest.
Claim 20
Dependent Claim
20 words
An apparatus acc to claim 17, wherein said recording material carrying member stops after completion of the image transfer operation.
Claim 21
Dependent Claim
14 words
An apparatus according to claim 17, wherein said recording material carrying member is rotatable.
Claim 22
Dependent Claim
25 words
An apparatus according to claim 17, further comprising an urging member for urging the sheet, said urging member and said assisting member sandwiches the sheet.
Claim 23
Dependent Claim
19 words
An apparatus according to claim 17, wherein said urging member is at a position faced to said assisting member.
Claim 24
Dependent Claim
14 words
An apparatus according to claim 17, wherein said urging member is an elastic sheet.
Claim 25
Dependent Claim
62 words
An apparatus according to claim 17, wherein when the recording material from a sheet supply station is carried on said recording material carrying member, said assisting member urges the recording material to said sheet, and after a trailing edge of the recording material is carried on said recording material carrying member, said assisting member is separated from said recording material carrying member.
Claim 26
Dependent Claim
17 words
An apparatus according to claim 17, wherein said assisting member is in the form of a roller.
Claim 27
Dependent Claim
40 words
An apparatus according to claim 17, wherein said apparatus is capable of forming plural color toner images on said image bearing member, and the toner images are sequentially transferred onto the recording material carried on said recording material carrying member.
Claim 28
Dependent Claim
33 words
An apparatus according to claim 27, wherein the toner images include yellow, magenta, cyan and black toner images, which are fixed by image fixing means into a full-color image on the recording material.
Claim 29
Dependent Claim
19 words
An apparatus according to claim 17, wherein said recording material carrying member is in the form of a drum.
Claim 30
Dependent Claim
19 words
An apparatus according to claim 20, wherein said urging member is disposed inside of said recording material carrying member.
Claim 31
Dependent Claim
18 words
An apparatus according to claim 27, wherein said assisting member is disposed below said recording material carrying member.
Claim 32
Dependent Claim
190 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; and an assisting member for assisting at a carrying position attraction of the recording material to said recording material carrying member, said assisting member being movable to and away from said sheet, wherein when the recording material from a sheet supply station is carried on said recording material carrying member, said assisting member urges the recording material toward said sheet, and after a trailing edge of the recording material is carried on said recording material carrying member past said assisting member, said assisting member is separated from said sheet; wherein said assisting member contact said sheet at least a part of a period in which an image transfer operation is being completed, which is after the recording material passes by said carrying position and which is before a next recording material is carried on said carrying member.
Claim 33
Dependent Claim
190 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; and an assisting member for assisting at a carrying position attraction of the recording material to said recording material carrying member, said assisting member being movable to and away from said sheet, wherein when the recording material from a sheet supply station is carried on said recording material carrying member, said assisting member urges the recording material toward said sheet, and after a trailing edge of the recording material is carried on said recording material carrying member past said assisting member, said assisting member is separated from said sheet; wherein said assisting member contact said sheet at least a part of a period in which an image transfer operation is being completed, which is after the recording material passes by said carrying position and which is before a next recording material is carried on said carrying member.
Claim 34
Dependent Claim
53 words
An apparatus according to claim 30, wherein said assisting member remains in contact with said sheet during a period in which an image transfer operation is being completed, which is after the recording material passes by said carrying position and which is before a next recording material is carried on said carrying member.
Claim 35
Dependent Claim
25 words
An apparatus according to claim 30, further comprising an urging member for urging the sheet, said urging member and said assisting member sandwiches the sheet.
Claim 36
Dependent Claim
18 words
An apparatus according to claim 32, wherein said urging member is at a position opposing said assisting member.
Claim 37
Dependent Claim
14 words
An apparatus according to claim 32, wherein said urging member is an elastic sheet.
Claim 38
Dependent Claim
17 words
An apparatus according to claim 30, wherein said assisting member is in the form of a roller.
Claim 39
Dependent Claim
40 words
An apparatus according to claim 30, wherein said apparatus is capable of forming plural color toner images on said image bearing member, and the toner images are sequentially transferred onto the recording material carried on said recording material carrying member.
Claim 40
Dependent Claim
33 words
An apparatus according to claim 36, wherein the toner images include yellow, magenta, cyan and black toner images, which are fixed by image fixing means into a full-color image on the recording material.
Claim 41
Dependent Claim
20 words
An apparatus according to claim 30, wherein said recording material carrying member is in the form of a rotatable drum.
Claim 42
Dependent Claim
19 words
An apparatus according to claim 32, wherein said urging member is disposed inside of said recording material carrying member.
Claim 43
Dependent Claim
18 words
An apparatus according to claim 39, wherein said assisting member is disposed below said recording material carrying member.
Claim 44
Dependent Claim
45 words
An apparatus according to claim 30, wherein said assisting member contacts said sheet at least a part of a period which is after the image is fixed on the recording material and which is before a next recording material is carried on said carrying member.
Claim 45
Dependent Claim
44 words
An apparatus according to claim 41, wherein said assisting member remains in contact with said sheet during a period which is after the image is fixed on the recording material and which is before a next recording material is carried on said carrying member.
Claim 46
Dependent Claim
25 words
An apparatus according to claim 30, wherein when said recording material carrying member is at rest, said assisting member is in contact with said sheet.
Claim 47
Dependent Claim
20 words
An apparatus according to claim 32, wherein when said assisting member contact said sheet, said urging member contacts said sheet.
Claim 48
Dependent Claim
151 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting said recording material carrying member to carry the recording material, said assisting member being movable to and away from said sheet, wherein when the recording material from a sheet supply station is carried on said recording material carrying member, said assisting member urges the recording material to said sheet, and after a trailing edge of the recording material is carried on said recording material carrying member, said assisting member is separated from said sheet; wherein said assisting member is in contact with said sheet when said recording material carrying member is at rest.
Claim 49
Dependent Claim
151 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting said recording material carrying member to carry the recording material, said assisting member being movable to and away from said sheet, wherein when the recording material from a sheet supply station is carried on said recording material carrying member, said assisting member urges the recording material to said sheet, and after a trailing edge of the recording material is carried on said recording material carrying member, said assisting member is separated from said sheet; wherein said assisting member is in contact with said sheet when said recording material carrying member is at rest.
Claim 50
Dependent Claim
20 words
An apparatus according to claim 45, wherein said recording material carrying member stops after completion of the image transfer operation.
Claim 51
Dependent Claim
14 words
An apparatus according to claim 45, wherein said recording material carrying member is rotatable.
Claim 52
Dependent Claim
26 words
An apparatus according to claim 45, further comprising an urging member for urging the sheet, the sheet being between said urging member and said assisting member.
Claim 53
Dependent Claim
18 words
An apparatus according to claim 48, wherein said urging member is at a position opposing said assisting member.
Claim 54
Dependent Claim
14 words
An apparatus according to claim 48, wherein said urging member is an elastic sheet.
Claim 55
Dependent Claim
17 words
An apparatus according to claim 45, wherein said assisting member is in the form of a roller.
Claim 56
Dependent Claim
40 words
An apparatus according to claim 45, wherein said apparatus includes means for forming plural color toner images on said image bearing member, whereby the toner images are sequentially transferred onto the recording material carried on said recording material carrying member.
Claim 57
Dependent Claim
33 words
An apparatus according to claim 52, wherein the toner images include yellow, magenta, cyan and black toner images, which are fixed by image fixing means into a full-color image on the recording material.
Claim 58
Dependent Claim
19 words
An apparatus according to claim 45, wherein said recording material carrying member is in the form of a drum.
Claim 59
Dependent Claim
19 words
An apparatus according to claim 48, wherein said urging member is disposed inside of said recording material carrying member.
Claim 60
Dependent Claim
18 words
An apparatus according to claim 55, wherein said assisting member is disposed below said recording material carrying member.
Claim 61
Dependent Claim
160 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting at a carrying position the carrying of the recording material on said recording material carrying member, said assisting member being movable to and away from said sheet; and an urging member, disposed on an opposite side of said sheet from said assisting member and inside said recording material carrying member, for urging said sheet, wherein said assisting member contacts said sheet at least a part of a period in which an image transfer operation is being completed, which is after the recording material passes by said carrying position and which is before a next recording material is carried on said carrying member.
Claim 62
Dependent Claim
160 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet for carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting at a carrying position the carrying of the recording material on said recording material carrying member, said assisting member being movable to and away from said sheet; and an urging member, disposed on an opposite side of said sheet from said assisting member and inside said recording material carrying member, for urging said sheet, wherein said assisting member contacts said sheet at least a part of a period in which an image transfer operation is being completed, which is after the recording material passes by said carrying position and which is before a next recording material is carried on said carrying member.
Claim 63
Dependent Claim
53 words
An apparatus according to claim 57, wherein said assisting member remains in contact with said sheet during a period in which an image transfer operation is being completed, which is after the recording material passes by said carrying position and which is before a next recording material is carried on said carrying member.
Claim 64
Dependent Claim
14 words
An apparatus according to claim 57, wherein said urging member is an elastic sheet.
Claim 65
Dependent Claim
17 words
An apparatus according to claim 57, wherein said assisting member is in the form of a roller.
Claim 66
Dependent Claim
40 words
An apparatus according to claim 57, wherein said apparatus includes means for forming plural color toner images on said image bearing member, and the toner images are sequentially transferred onto the recording material carried on said recording material carrying member.
Claim 67
Dependent Claim
33 words
An apparatus according to claim 61, wherein the toner images include yellow, magenta, cyan and black toner images, which are fixed by image fixing means into a full-color image on the recording material.
Claim 68
Dependent Claim
20 words
An apparatus according to claim 57, wherein said recording material carrying member is in the form of a rotatable drum.
Claim 69
Dependent Claim
18 words
An apparatus according to claim 57, wherein said assisting member is disposed below said recording material carrying member.
Claim 70
Dependent Claim
45 words
An apparatus according to claim 57, wherein said assisting member contacts said sheet at least a part of a period which is after the image is fixed on the recording material and which is before a next recording material is carried on said carrying member.
Claim 71
Dependent Claim
44 words
An apparatus according to claim 65, wherein said assisting member remains in contact with said sheet during a period which is after the image is fixed on the recording material and which is before a next recording material is carried on said carrying member.
Claim 72
Dependent Claim
25 words
An apparatus according to claim 57, wherein when said recording material carrying member is at rest, said assisting member is in contact with said sheet.
Claim 73
Dependent Claim
20 words
An apparatus according to claim 57, wherein when said assisting member contacts said sheet, said urging member contacts said sheet.
Claim 74
Dependent Claim
120 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting carrying of the recording material on said recording material carrying member, said assisting member being movable to and away from said sheet; an urging member, disposed across said sheet from said assisting member and inside said recording material carrying member, for urging said sheet; wherein said assisting member is in contact with said sheet when said recording material carrying member is at rest.
Claim 75
Dependent Claim
120 words
An image forming apparatus, comprising: an image bearing member; a recording material carrying member for carrying a recording material, said carrying member including a sheet carrying the recording material; image transfer means for transferring an image from said image bearing member to the recording material carried on said recording material carrying member; an assisting member for assisting carrying of the recording material on said recording material carrying member, said assisting member being movable to and away from said sheet; an urging member, disposed across said sheet from said assisting member and inside said recording material carrying member, for urging said sheet; wherein said assisting member is in contact with said sheet when said recording material carrying member is at rest.
Claim 76
Dependent Claim
20 words
An apparatus according to claim 69, wherein said recording material carrying member stops after completion of the image transfer operation.
Claim 77
Dependent Claim
14 words
An apparatus according to claim 69, wherein said recording material carrying member is rotatable.
Claim 78
Dependent Claim
14 words
An apparatus according to claim 69, wherein said urging member is an elastic sheet.
Claim 79
Dependent Claim
17 words
An apparatus according to claim 69, wherein said assisting member is in the form of a roller.
Claim 80
Dependent Claim
40 words
An apparatus according to claim 69, wherein said apparatus includes means for forming plural color toner images on said image bearing member, and the toner images are sequentially transferred onto the recording material carried on said recording material carrying member.
Claim 81
Dependent Claim
33 words
An apparatus according to claim 74, wherein the toner images include yellow, magenta, cyan and black toner images, which are fixed by image fixing means into a full-color image on the recording material.
Claim 82
Dependent Claim
19 words
An apparatus according to claim 69, wherein said recording material carrying member is in the form of a drum.
Claim 83
Dependent Claim
18 words
An apparatus according to claim 69, wherein said assisting member is disposed below said recording material carrying member.
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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) | 1996-08-23 | 1997-02-22 | 1997-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-23 | 2001-02-22 | 2001-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-23 | 2005-02-22 | 2005-08-24 | $7700.00 | Window Closed / Lapsed |