Patent US5168290A successfully refreshed from Google Patents.
US5168290A
Expired / Lapsed
US
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Image forming apparatus having recording material carrying means
Assignee: Canon Inc
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Filing: 1990-10-29
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Granted: 1992-12-01
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Expires: 2010-10-29
Abstract
Abstract An image forming apparatus includes recording material carrying device for carrying thereon a recording material; image forming device for forming an image on the recording material carried on the recording material carrying device; attracting charger for electrostatically attracting the recording material on the recording material carrying device, the attracting charger first attracting the recording material on the recording material carrying device; feeding rollers for feeding the recording material to the recording material carrying device to attract it to the recording material carrying device, wherein a feeding speed by the feeding rollers is the same as or larger than a movement speed of the recording material carrying device or larger.
Inventors
- 👤 Kiyoharu Tanaka
- 👤 Kouji Kimura
- 👤 Hajime Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:25
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0105; G03G15/0131; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/165; G03G15/1655; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/0174; G03G2215/018
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
195 words
An image forming apparatus, comprising: recording material carrying means for carrying thereon a recording material, said recording material carrying means being flexible; image forming means for forming an image on the recording material carried on said recording material carrying means; attracting means for electrostatically attracting the recording material on said recording material carrying means before image formation on the recording material by said image forming means, said attracting means including contacting means for contacting said recording material carrying means, the recording material passing between said carrying means and said contacting means; feeding means for feeding the recording material to a contact position where said contacting means is in contact with said recording material carrying means, said feeding means being cooperative with said contacting means to form a loop of the recording material; and guiding means for guiding to said carrying means the recording material fed by said feeding means, said guiding means guiding a leading edge of the recording material in a direction different from a tangential direction of said carrying means, and said guiding means being displaceable to make a recording material moving direction approximate to the tangential direction when the loop is formed.
Claim 2
Dependent Claim
195 words
An image forming apparatus, comprising: recording material carrying means for carrying thereon a recording material, said recording material carrying means being flexible; image forming means for forming an image on the recording material carried on said recording material carrying means; attracting means for electrostatically attracting the recording material on said recording material carrying means before image formation on the recording material by said image forming means, said attracting means including contacting means for contacting said recording material carrying means, the recording material passing between said carrying means and said contacting means; feeding means for feeding the recording material to a contact position where said contacting means is in contact with said recording material carrying means, said feeding means being cooperative with said contacting means to form a loop of the recording material; and guiding means for guiding to said carrying means the recording material fed by said feeding means, said guiding means guiding a leading edge of the recording material in a direction different from a tangential direction of said carrying means, and said guiding means being displaceable to make a recording material moving direction approximate to the tangential direction when the loop is formed.
Claim 3
Dependent Claim
28 words
An apparatus according to claim 1, wherein said guiding means includes a first guiding means displaceable in accordance with feeding of the recording material by said feeding means.
Claim 4
Dependent Claim
37 words
An apparatus according to claim 2, wherein said guiding means includes a second guiding means faced to said first guiding means, said second guiding means is stationary when the recording material is conveyed by said feeding means.
Claim 5
Dependent Claim
42 words
An apparatus according to claim 3, wherein when the recording material is fed by said feeding means, a downstream end of said said first guiding means with respect to a direction of the feeding is displaced away from said second guiding means.
Claim 6
Dependent Claim
14 words
An apparatus according to claim 2, wherein said first guiding means has an elasticity.
Claim 7
Dependent Claim
16 words
An apparatus according to claim 2, further comprising driving means for moving said first guiding means.
Claim 8
Dependent Claim
31 words
An apparatus according to claim 2, wherein said first guiding means is separable along a direction crossing with a feeding direction of the recording material, and divided parts are independently displaceable.
Claim 9
Dependent Claim
24 words
An apparatus according to claim 4, wherein said first guiding means is disposed between said recording material carrying means and said second guiding means.
Claim 10
Dependent Claim
21 words
An apparatus according to claim 1, wherein said recording material carrying means attracts the recording material thereon mainly by electrostatic force.
Claim 11
Dependent Claim
22 words
An apparatus according to claim 1, wherein said recording material carrying means includes a dielectric material sheet to carry the recording material.
Claim 12
Dependent Claim
45 words
An apparatus according to claim 1, wherein said image forming means includes an image bearing member for carrying a toner image and transfer means for transferring the toner image from said image bearing member to the recording material carried by said recording material carrying means.
Claim 13
Dependent Claim
40 words
An apparatus according to claim 1, wherein said recording material carrying means is movable along and endless path, and wherein a plurality of different color images are formed on the same recording material carried on said recording material carrying means.
Claim 14
Dependent Claim
21 words
An apparatus according to claim 1, wherein said apparatus is capable of forming a full color image on the recording material.
Claim 15
Dependent Claim
27 words
An apparatus according to claim 1, wherein said contacting means includes a rotatable member contactable to a recording material carrying surface of said recording material carrying means.
Claim 16
Dependent Claim
30 words
An apparatus according to claim 14, wherein said attracting means includes corona charging means disposed faced to an opposite side of said recording material carrying means from said rotatable member.
Claim 17
Dependent Claim
25 words
An apparatus according to claim 1, further comprising an urging means, disposed across said carrying means from said contacting means, for urging said carrying means.
Claim 18
Dependent Claim
14 words
An apparatus according to claim 16, wherein said urging means comprises an elastic sheet.
Claim 19
Dependent Claim
28 words
An apparatus according to claim 1, wherein said feeding means feeds the recording material at a speed which is higher than a movement speed of said carrying means.
Claim 20
Dependent Claim
21 words
An apparatus according to claim 2, wherein said first guiding means is displaceable by a feeding force of said feeding means.
Claim 21
Dependent Claim
45 words
An apparatus according to claim 1, further comprising a second guiding means, disposed downstream of the contact position and upstream of an image forming position with respect to a movement direction of said carrying means, for guiding the recording material carried on said carrying means.
Claim 22
Dependent Claim
51 words
An apparatus according to claim 3, wherein said contacting means and said second guiding means are simultaneously movable to a position where said contacting means and said second guiding means they are out of contact with the recording material when the recording material having the image is in the contacting position.
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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) | 1995-12-01 | 1996-06-01 | 1996-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-01 | 2000-06-01 | 2000-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-01 | 2004-06-01 | 2004-12-01 | $7700.00 | Window Closed / Lapsed |