Patent US2631966A successfully refreshed from Google Patents.
US5083167A
Expired / Lapsed
US
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Image forming apparatus for supplying different amounts of electric charge to an end portion of a transfer material
Assignee: Canon Inc
•
Filing: 1990-05-07
•
Granted: 1992-01-21
•
Expires: 2010-05-07
Abstract
Abstract An image forming apparatus includes a movable image bearing member; an image forming device for forming a toner image on the image bearing member; a transfer device for electrostatically transferring the toner image from the image bearing member onto a transfer material at an image transfer position; a transfer material carrying device for carrying the transfer material to the transfer position; wherein the transfer device supplies different electric charge amount per unit area to an end of the transfer material in a direction of conveyance of the transfer material by the transfer material carrying device and to another portion of the transfer material.
Inventors
- 👤 Satoru Fukushima
- 👤 Kenichi Takeda
- 👤 Atsushi Takeda
- 👤 Yoshio Uchikawa
- 👤 Takashi Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:22
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/1645; G03G15/01; G03G15/0105; G03G15/0131; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/0174; G03G2215/0177; G03G2215/018
Claims Analysis
Total Claims: 112
Claim 1
Independent Claim
115 words
An image forming apparatus comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means supplies different electric charge amounts per unit area to an end portion of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material, wherein said transfer material carrying means has a carrying surface made of dielectric material.
Claim 2
Dependent Claim
115 words
An image forming apparatus comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means supplies different electric charge amounts per unit area to an end portion of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material, wherein said transfer material carrying means has a carrying surface made of dielectric material.
Claim 3
Dependent Claim
26 words
An apparatus according to claim 1, wherein said transfer means supplies the different amounts of electric charge during an image transfer operation to the transfer material.
Claim 4
Dependent Claim
40 words
An apparatus according to claim 1, wherein said transfer means supplies the different amounts of electric charge when the transfer material having a toner image is at the transfer position not for transferring another toner image onto the transfer material.
Claim 5
Dependent Claim
29 words
An apparatus according to claim 1, wherein the end portion is a leading end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 6
Dependent Claim
29 words
An apparatus according to claim 1, wherein the end portion is a trailing end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 7
Dependent Claim
43 words
An apparatus according to claim 1, wherein a peripheral length of said image bearing member measured in a direction of its movement is smaller than a maximum length of the transfer material measured in a conveyance direction of said transfer material carrying means.
Claim 8
Dependent Claim
36 words
An apparatus according to claim 1, wherein said image forming mean includes latent image forming means for forming a latent image on said image bearing member and developing means for developing the latent image with toner.
Claim 9
Dependent Claim
24 words
An apparatus according to claim 7, wherein said transfer means has a charging polarity which is opposite to a polarity of the latent image.
Claim 10
Dependent Claim
35 words
An apparatus according to claim 8, wherein said image bearing member is a photosensitive member, and said latent image forming means includes exposure means for exposing the photosensitive member in accordance with the image information.
Claim 11
Dependent Claim
17 words
An apparatus according to claim 9, wherein said photosensitive member has a layer made of organic photoconductive.
Claim 12
Dependent Claim
45 words
An apparatus according to claim 1, further comprising discharge means having a polarity opposite to that of said transfer means, and disposed opposed to said transfer material carrying means downstream of said transfer material carrying means in a direction of conveyance of the transfer material.
Claim 13
Dependent Claim
37 words
An apparatus according to claim 11, wherein said discharging means applies electric discharge to the transfer material carried on said transfer material carrying means when the end portion of the transfer material is at the transfer position.
Claim 14
Dependent Claim
43 words
An apparatus according to claim 13, wherein said discharging means discharges a larger amount of electric discharge when the end portion of the transfer material is at the transfer position than when another portion of the transfer material is at the transfer position.
Claim 15
Dependent Claim
41 words
An apparatus according to claim 2, wherein when said transfer means effects its transfer operation onto the transfer material, the end portion of the transfer material is contacted to a portion of said image bearing member where no image is formed.
Claim 16
Dependent Claim
15 words
An apparatus according to claim 1, wherein said transfer means includes a corona discharging means.
Claim 17
Dependent Claim
41 words
An apparatus according to claim 1, further comprising electrostatic attracting means for electrostatically attracting the transfer material on the transfer material carrying means at a position upstream of the transfer position in a conveyance direction of said transfer material carrying means.
Claim 18
Dependent Claim
19 words
An apparatus according to claim 1, wherein said transfer means effects plural transfer operations onto the same transfer material.
Claim 19
Dependent Claim
20 words
An apparatus according to claim 1, wherein after the image transfer, a full-color image is formed on the transfer material.
Claim 20
Dependent Claim
36 words
An apparatus according to claim 3, wherein said image forming means includes latent image forming means for forming a latent image on said image bearing member and developing means for developing the latent image with toner.
Claim 21
Dependent Claim
52 words
An apparatus according to claim 19, wherein said developing means includes movable developing devices, wherein said developing devices are selectively presented before said image bearing member when said transfer means effects the transfer operation to the transfer material, and when the transfer material having a toner image is at the transfer position.
Claim 22
Dependent Claim
53 words
An apparatus according to claim 3, wherein the transfer material is contacted to a portion of said image bearing member where no image is formed, when said transfer means does not effect the transfer operation onto the transfer material and when the transfer material having the toner image is at the transfer position.
Claim 23
Dependent Claim
25 words
An apparatus according to claim 2, wherein the portion of said image bearing member is a portion thereof where the latent image is not formed.
Claim 24
Independent Claim
25 words
An apparatus according wherein the different amounts of electric charge is such that the amount for the end portion of the transfer material is smaller.
Claim 25
Independent Claim
25 words
An apparatus according wherein the different amounts of electric charge is such that the amount for the end portion of the transfer material is smaller.
Claim 26
Dependent Claim
20 words
An apparatus according to claim 1, wherein the difference is provided by changing the output power of said transfer means.
Claim 27
Dependent Claim
26 words
An apparatus according to claim 1, wherein said transfer material carrying means has an endless path to repeatedly conveying the transfer material to the transfer position.
Claim 28
Dependent Claim
112 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means produces different outputs per unit area to an end of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material, wherein said transfer material carrying means has a carrying surface made of dielectric material.
Claim 29
Dependent Claim
112 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means produces different outputs per unit area to an end of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material, wherein said transfer material carrying means has a carrying surface made of dielectric material.
Claim 30
Dependent Claim
25 words
An apparatus according to claim 26, wherein said transfer means supplies the different amounts of outputs during an image transfer operation to the transfer material.
Claim 31
Dependent Claim
37 words
An apparatus according to claim 26, wherein said transfer means supplies the different outputs when the transfer material having a toner image is at the transfer position not for transferring another toner image onto the transfer material.
Claim 32
Dependent Claim
29 words
An apparatus according to claim 26, wherein the end portion is a leading end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 33
Dependent Claim
29 words
An apparatus according to claim 26, wherein the end portion is a trailing end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 34
Dependent Claim
43 words
An apparatus according to claim 26, wherein a peripheral length of said image bearing member measured in a direction of its movement is smaller than a maximum length of the transfer material measured in a conveyance direction of said transfer material carrying means.
Claim 35
Dependent Claim
36 words
An apparatus according to claim 26, wherein said image forming means includes latent image forming means for forming a latent image on said image bearing member and developing means for developing the latent image with toner.
Claim 36
Dependent Claim
24 words
An apparatus according to claim 32, wherein said transfer means has a charging polarity which is opposite to a polarity of the latent image.
Claim 37
Dependent Claim
35 words
An apparatus according to claim 33, wherein said image bearing member is a photosensitive member, and said latent image forming means includes exposure means for exposing the photosensitive member in accordance with the image information.
Claim 38
Dependent Claim
17 words
An apparatus according to claim 34, herein said photosensitive member has a layer made of organic photoconductive.
Claim 39
Dependent Claim
45 words
An apparatus according to claim 26, further comprising discharge means having a polarity opposite to that of said transfer means, and disposed opposed to said transfer material carrying means downstream of said transfer material carrying means in a direction of conveyance of the transfer material.
Claim 40
Dependent Claim
37 words
An apparatus according to claim 36, wherein said discharging means applies electric discharge to the transfer material carried on said transfer material carrying means when the end portion of the transfer material is at the transfer position.
Claim 41
Dependent Claim
43 words
An apparatus according to claim 37, wherein said discharging means discharges a larger amount of electric discharge when the end portion of the transfer material is at the transfer position than when another portion of the transfer material is at the transfer position.
Claim 42
Dependent Claim
41 words
An apparatus according to claim 27, wherein when said transfer means effects its transfer operation onto the transfer material, the end portion of the transfer material is contacted to a portion of said image bearing member where no image is formed.
Claim 43
Dependent Claim
15 words
An apparatus according to claim 26, herein said transfer means includes a corona discharging means.
Claim 44
Dependent Claim
41 words
An apparatus according to claim 26, further comprising electrostatic attracting means for electrostatically attracting the transfer material on said transfer material carrying means at a position upstream of the transfer position in a conveyance direction of said transfer material carrying means.
Claim 45
Dependent Claim
19 words
An apparatus according to claim 26, wherein said transfer means effects plural transfer operations onto the same transfer material.
Claim 46
Dependent Claim
20 words
An apparatus according to claim 26 wherein after the image transfer, a full-color image is formed on the transfer material.
Claim 47
Dependent Claim
36 words
An apparatus according to claim 28, wherein said image forming means includes latent image forming means for forming a latent image on said image bearing member and developing means for developing the latent image with toner.
Claim 48
Dependent Claim
50 words
An apparatus according to claim 44, wherein said developing means includes movable developing devices, wherein said are selectively presented before said image bearing member when said transfer means effects the transfer operation to the transfer material, and when the transfer material having a toner image is at the transfer position.
Claim 49
Dependent Claim
53 words
An apparatus according to claim 28, wherein the transfer material is contacted to a portion of said image bearing member where no image is formed, when said transfer means does not effect the transfer operation onto the transfer material and when the transfer material having the toner image is at the transfer position.
Claim 50
Dependent Claim
25 words
An apparatus according to claim 28, wherein the portion of said image bearing member is a portion thereof where the latent image is not formed.
Claim 51
Dependent Claim
25 words
An apparatus according to claim 26, wherein the different outputs is such that the output for the end portion of the transfer material is smaller.
Claim 52
Dependent Claim
17 words
An apparatus according to claim 26, wherein the output of the transfer means is the output current.
Claim 53
Dependent Claim
26 words
An apparatus according to claim 26, wherein said transfer material carrying means has an endless path to repeatedly conveying the transfer material to the transfer position.
Claim 54
Dependent Claim
125 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means supplies different electric charge amounts per unit area to an end portion of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein the end portion is a trailing end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 55
Dependent Claim
125 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means supplies different electric charge amounts per unit area to an end portion of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein the end portion is a trailing end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 56
Dependent Claim
19 words
An apparatus according to claim 51, wherein said transfer means effects plural transfer operations onto the same transfer material.
Claim 57
Dependent Claim
115 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means supplies different electric charge amounts per unit area to an end portion of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein said transfer means effects plural transfer operations onto the same transfer material.
Claim 58
Dependent Claim
115 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means supplies different electric charge amounts per unit area to an end portion of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein said transfer means effects plural transfer operations onto the same transfer material.
Claim 59
Dependent Claim
30 words
An apparatus according to claim 51 or 53, wherein the different amounts of electric charge is such that the amount for the end portion of the transfer material is smaller.
Claim 60
Dependent Claim
124 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means supplies different electric charge amounts per unit area to an end portion of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein the different amounts of electric charge is such that the amount for the end portion of the transfer material is smaller.
Claim 61
Dependent Claim
124 words
An image forming apparatus, comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means supplies different electric charge amounts per unit area to an end portion of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein the different amounts of electric charge is such that the amount for the end portion of the transfer material is smaller.
Claim 62
Independent Claim
29 words
An apparatus according to claims 51, 53 or 55, wherein said transfer means supplies the different amounts of electric charge during an image transfer operation to the transfer material.
Claim 63
Independent Claim
43 words
An apparatus according to claims 51, 53 or 55, wherein said transfer means supplies the different amounts of electric charge when the transfer material having a toner image is at the transfer position not for transferring another toner image onto the transfer material.
Claim 64
Independent Claim
31 words
An apparatus according to claims 53 or 55, wherein the end portion is a leading end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 65
Independent Claim
46 words
An apparatus according to claims 51, 53 or 55, wherein a peripheral length of said image bearing member measured in a direction of its movement is smaller than a maximum length of the transfer material measured in a conveyance direction of said transfer material carrying means.
Claim 66
Independent Claim
39 words
An apparatus according to claims 51, 53 or 55, wherein said image forming means includes latent image forming means for forming a latent image on said image bearing member and developing means for developing the latent image with toner.
Claim 67
Dependent Claim
24 words
An apparatus according to claim 60, wherein said transfer means has a charging polarity which is opposite to a polarity of the latent image.
Claim 68
Dependent Claim
35 words
An apparatus according to claim 61, wherein said image bearing member is a photosensitive member, and said latent image forming means includes exposure means for exposing the photosensitive member in accordance with the image information.
Claim 69
Dependent Claim
17 words
An apparatus according to claim 62, wherein the photosensitive member has a layer made of organic photoconductive.
Claim 70
Independent Claim
48 words
An apparatus according to claims 51, 53 or 55, further comprising discharge means having a polarity opposite to that of said transfer means, and disposed opposed to said transfer material carrying means downstream of said transfer material carrying means in a direction of conveyance of the transfer material.
Claim 71
Dependent Claim
37 words
An apparatus according to claim 64, wherein said discharging means applies electric discharge to the transfer material carried on said transfer material carrying means when the end portion of the transfer material is at the transfer position.
Claim 72
Dependent Claim
43 words
An apparatus according to claim 65, wherein said discharging means discharge a larger amount of electric discharge when the end portion of the transfer material is at the transfer position than when another portion of the transfer material is at the transfer position.
Claim 73
Dependent Claim
41 words
An apparatus according to claim 56, wherein when said transfer means effects its transfer operation onto the transfer material, the end portion of the transfer material is contacted to a portion of said image bearing member where no image is formed.
Claim 74
Independent Claim
17 words
An apparatus according to claims 51, 53 or 55, wherein said transfer means includes corona discharging means.
Claim 75
Independent Claim
44 words
An apparatus according to claims 51, 53 or 55, further comprising electrostatic attracting means for electrostatically attracting the transfer material on the transfer material carrying means at a position upstream of the transfer position in a conveyance direction of said transfer material carrying means.
Claim 76
Independent Claim
16 words
An apparatus according to claims 53, 55 or 52, wherein the toner is a color toner.
Claim 77
Dependent Claim
36 words
An apparatus according to claim 57, wherein said image forming means includes latent image forming means for forming a latent image on said image bearing member and developing means for developing the latent image with toner.
Claim 78
Dependent Claim
52 words
An apparatus according to claim 71 wherein said developing means includes movable developing devices, wherein said developing devices are selectively presented before said image bearing member when said transfer means effects the transfer operation to the transfer material, and when the transfer material having a toner image is at the transfer position.
Claim 79
Dependent Claim
53 words
an apparatus according to claim 57, wherein the transfer material is contacted to a portion of said image bearing member where no image is formed, when said transfer means does not effect the transfer operation onto the transfer material and when the transfer material having the toner image is at the transfer position.
Claim 80
Dependent Claim
25 words
An apparatus according to claim 73, wherein the portion of said image bearing member is a portion thereof where the latent image is not formed.
Claim 81
Dependent Claim
23 words
An apparatus according to claim 51, 53 or 55, wherein the difference is provided by changing the output power of said transfer means.
Claim 82
Dependent Claim
29 words
An apparatus according to claim 51, 53 or 55, wherein said transfer material carrying means has an endless path to repeatedly conveying the transfer material to the transfer position.
Claim 83
Dependent Claim
122 words
An image forming apparatus comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means produces different outputs per unit area to an end of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein the end portion is a trailing end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 84
Dependent Claim
122 words
An image forming apparatus comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means produces different outputs per unit area to an end of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein the end portion is a trailing end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 85
Dependent Claim
19 words
An apparatus according to claim 77, wherein said transfer means effects plural transfer operations onto the same transfer material.
Claim 86
Dependent Claim
112 words
An image forming apparatus comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means produces different outputs per unit area to an end of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein said transfer means effects plural transfer operations onto the same transfer material.
Claim 87
Dependent Claim
112 words
An image forming apparatus comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means produces different outputs per unit area to an end of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein said transfer means effects plural transfer operations onto the same transfer material.
Claim 88
Dependent Claim
27 words
An apparatus according to claim 77 or 79, wherein the different outputs is such that the output for the end portion of the transfer material is smaller.
Claim 89
Dependent Claim
118 words
An image forming apparatus comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means produces different outputs per unit area to an end of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein the different outputs is such that the output for the end portion of the transfer material is smaller.
Claim 90
Dependent Claim
118 words
An image forming apparatus comprising: a movable image bearing member; image forming means for forming a toner image on said image bearing member; transfer means for electrostatically transferring the toner image from said image bearing member onto a transfer material at an image transfer position; transfer material carrying means for carrying the transfer material to the transfer position; wherein said transfer means produces different outputs per unit area to an end of the transfer material in a direction of conveyance of the transfer material by said transfer material carrying means and to another portion of the transfer material; and wherein the different outputs is such that the output for the end portion of the transfer material is smaller.
Claim 91
Dependent Claim
28 words
An apparatus according to claim 77, 79, or 81, wherein said transfer means supplies the different amounts of outputs during an image transfer operation to the transfer material.
Claim 92
Dependent Claim
40 words
An apparatus according to claim 77, 79 or 81, wherein said transfer means supplies the different outputs when the transfer material having a toner image is at the transfer position not for transferring another toner image onto the transfer material.
Claim 93
Dependent Claim
31 words
An apparatus according to claim 79 or 81, wherein the end portion is a leading end portion of the transfer material in a conveyance direction of said transfer material carrying means.
Claim 94
Dependent Claim
46 words
An apparatus according to claim 77, 79 or 81, wherein a peripheral length of said image bearing member measured in a direction of its movement is smaller than a maximum length of the transfer material measured in a conveyance direction of said transfer material carrying means.
Claim 95
Dependent Claim
39 words
An apparatus according to claim 77, 79 or 81, wherein said image forming means includes latent image forming means for forming a latent image on said image bearing member and developing means for developing the latent image with toner.
Claim 96
Dependent Claim
24 words
An apparatus according to claim 86, wherein said transfer means has a charging polarity which is opposite to a polarity of the latent image.
Claim 97
Dependent Claim
35 words
An apparatus according to claim 87, wherein said image bearing member is a photosensitive member, and said latent image forming means includes exposure means for exposing said photosensitive member in accordance with the image information.
Claim 98
Dependent Claim
17 words
An apparatus according to claim 88, wherein said photosensitive member has a layer made of organic photoconductive.
Claim 99
Dependent Claim
48 words
An apparatus according to claim 77, 79 or 81, further comprising discharge means having a polarity opposite to that of said transfer means, and disposed opposed to said transfer material carrying means downstream of said transfer material carrying means in a direction of conveyance of the transfer position.
Claim 100
Dependent Claim
37 words
An apparatus according to claim 90, wherein said discharging means applies electric discharge to the transfer material carried on said transfer material carrying means when the end portion of the transfer material is at the transfer position.
Claim 101
Dependent Claim
43 words
An apparatus according to claim 91, wherein said discharging means discharges a larger amount of electric discharge when the end portion of the transfer material is at the transfer position than when another portion of the transfer material is at the transfer position.
Claim 102
Dependent Claim
41 words
An apparatus according to claim 82, wherein when said transfer means effects its transfer operation onto the transfer material, the end portion of the transfer material is contacted to a portion of said image bearing member where no image is formed.
Claim 103
Dependent Claim
17 words
An apparatus according to claim 77, 79 or 81, wherein said transfer means includes corona discharging means.
Claim 104
Dependent Claim
44 words
An apparatus according to claim 77, 79 or 81, further comprising electrostatic attracting means for electrostatically attracting the transfer material on said transfer material carrying means at a position upstream of the transfer position in a conveyance direction of said transfer material carrying means.
Claim 105
Dependent Claim
16 words
An apparatus according to claim 79, 81 or 78, wherein the toner is a color toner.
Claim 106
Dependent Claim
36 words
An apparatus according to claim 83, wherein said image forming means includes latent image forming means for forming a latent image on said image bearing member and developing means for developing the latent image with toner.
Claim 107
Dependent Claim
52 words
An apparatus according to claim 97, wherein said developing means includes movable developing device, wherein said developing devices are selectively presented before said image bearing member when said transfer means effects the transfer operation to the transfer material, and when the transfer material having a toner image is at the transfer position.
Claim 108
Dependent Claim
53 words
An apparatus according to claim 83, wherein the transfer material is contacted to a portion of said image bearing member where no image is formed, when said transfer means does not effect the transfer operation onto the transfer material and when the transfer material having the toner image is at the transfer position.
Claim 109
Dependent Claim
25 words
An apparatus according to claim 99, wherein the portion of said image bearing member is a portion thereof where the latent image is not formed.
Claim 110
Dependent Claim
20 words
An apparatus according to claim 77, 79 or 81, wherein the output of said transfer means is the output current.
Claim 111
Dependent Claim
29 words
An apparatus according to claim 77, 79 or 81, wherein said transfer material carrying means has an endless path to repeatedly conveying the transfer material to the transfer position.
Claim 112
Dependent Claim
20 words
An apparatus according to claim 81, wherein said transfer means provides its output for the edge of the transfer material.
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USPTO Annuity & Maintenance Windows
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| 3.5 Years (Year 4) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |