EP0372518A2
Expired / Lapsed
EP
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Fixing apparatus
Assignee: Canon Inc
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Filing: 1989-12-06
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Granted: —
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Expires: 2009-12-06
Abstract
Abstract The present invention relates to a fixing apparatus having a pair of rotary members for pinching and conveying a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on the supporting material and wherein a rectifier element is connected to at least one of the rotary members in a predetermined orientation, whereby the present invention prevent a toner offset that the toner on the supporting material is adhered to the rotary members.
Inventors
- 👤 Koichi Okuda
- 👤 Yoji Tomoyuki
- 👤 Toshio Miyamoto
- 👤 Junji Araya
- 👤 Yukihiro Ohzeki
- 👤 Masanobu Saito
- 👤 Shunji Nakamura
- 👤 Yasumasa Ohtsuka
- 👤 Tatsunori Ishiyama
- 👤 Katsuhiko Nishimura
- 👤 Akira Hayakawa
- 👤 Yasushi Sato
- 👤 Kimio Nakahata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 01:42
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
87 words
A fixing apparatus comprising: a pair of rotary members for pinching therebetween and conveying therethrough supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; and a rectifier element connected between one of said rotary members which is contacted with the non-fixed toner image and an earth, said rectifier element being so connected that said one rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner.
Claim 2
Dependent Claim
87 words
A fixing apparatus comprising: a pair of rotary members for pinching therebetween and conveying therethrough supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; and a rectifier element connected between one of said rotary members which is contacted with the non-fixed toner image and an earth, said rectifier element being so connected that said one rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner.
Claim 3
Dependent Claim
26 words
A fixing apparatus according to claim 1, wherein said one rotary member which is contacted with the non-fixed toner image is heated by a heating means.
Claim 4
Dependent Claim
16 words
A fixing apparatus according to claim 1 or 2, wherein said rectifier element comprises a diode.
Claim 5
Dependent Claim
125 words
A fixing apparatus used with an image forming system wherein a toner image formed on an image bearing member is transferred onto a recording material by a transferring means having a transfer rotary member rotating while contacting said recording material, comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; and a rectifier element connected between one of said rotary members which is contacted with the non-fixed toner image and an earth, said rectifier element being so connected that said one rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner.
Claim 6
Dependent Claim
125 words
A fixing apparatus used with an image forming system wherein a toner image formed on an image bearing member is transferred onto a recording material by a transferring means having a transfer rotary member rotating while contacting said recording material, comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; and a rectifier element connected between one of said rotary members which is contacted with the non-fixed toner image and an earth, said rectifier element being so connected that said one rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner.
Claim 7
Dependent Claim
26 words
A fixing apparatus according to claim 4, wherein said one rotary member which is contacted with the non-fixd toner image is heated by a heating means.
Claim 8
Dependent Claim
15 words
A fixing apparatus according to claim4 or 5, wherein said rectifier element comprises a diode.
Claim 9
Dependent Claim
131 words
A fixing apparatus comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; a first rectifier element connected between one of said rotary members which is contacted with the non-fixed toner image and an earth, said first rectifier element being so connected that said one rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner; and a second rectifier element connected between the other of said rotary members and an earth, said second rectifier element being so connected that said the other rotary member holds a charge having a charge polarity opposite to that of the toner.
Claim 10
Dependent Claim
131 words
A fixing apparatus comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; a first rectifier element connected between one of said rotary members which is contacted with the non-fixed toner image and an earth, said first rectifier element being so connected that said one rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner; and a second rectifier element connected between the other of said rotary members and an earth, said second rectifier element being so connected that said the other rotary member holds a charge having a charge polarity opposite to that of the toner.
Claim 11
Dependent Claim
26 words
A fixing apparatus according to claim 7, wherein said one rotary member which is contacted with the non-fixed toner image is heated by a heating means.
Claim 12
Dependent Claim
22 words
A fixing apparatus according to claim 7, wherein said the other rotary member has a resistance of 10 12 n or less.
Claim 13
Dependent Claim
23 words
A fixing apparatus according to any one of claims 7, 8 and 9, wherein said first and second rectifier elements comprise diodes, respectively.
Claim 14
Dependent Claim
52 words
A fixing apparatus according to claim 7, wherein further including a charge removing means contacting the back of said supporting material after the fixing of the toner image thereon and arranged downstream of a nip formed between said pair of rotary members with respect to a feeding direction of said supporting material.
Claim 15
Dependent Claim
14 words
A fixing apparatus according to claim 11, wherein said charge removing means is earthed.
Claim 16
Dependent Claim
135 words
A fixing apparatus used with an image forming system having an image bearing member, means for forming a toner image on said image bearing member, and a transfer charger means for transferring the toner image formed on said image bearing member onto a recording material, comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; and a rectifier element connected between one of said rotary members which is contacted with a surface of said recording material which is charged by said transfer charger means and an earth, said rectifier element being so connected that said one rotary member holds a charge having the same charge polarity as that obtained by said transfer charger means.
Claim 17
Dependent Claim
135 words
A fixing apparatus used with an image forming system having an image bearing member, means for forming a toner image on said image bearing member, and a transfer charger means for transferring the toner image formed on said image bearing member onto a recording material, comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; and a rectifier element connected between one of said rotary members which is contacted with a surface of said recording material which is charged by said transfer charger means and an earth, said rectifier element being so connected that said one rotary member holds a charge having the same charge polarity as that obtained by said transfer charger means.
Claim 18
Dependent Claim
14 words
A fixing apparatus according to claim 13, wherein said rectifier element comprises a diode.
Claim 19
Dependent Claim
97 words
A fixing apparatus comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material, said rotary members being electrically connected to each other; and a rectifier element connected between one of said rotary members which is contacted with the non-fixed toner image and an earth, said rectifier element being so connected that said one rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner.
Claim 20
Dependent Claim
97 words
A fixing apparatus comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material, said rotary members being electrically connected to each other; and a rectifier element connected between one of said rotary members which is contacted with the non-fixed toner image and an earth, said rectifier element being so connected that said one rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner.
Claim 21
Dependent Claim
14 words
A fixing apparatus according to claim 15, wherein said rectifier element comprises a diode.
Claim 22
Dependent Claim
93 words
A fixing apparatus comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; a first rectifier element connected between said rotary members, said first rectifier element being so connected that one of said rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner; and a second rectifier element connected between the other of said rotary members and an earth.
Claim 23
Dependent Claim
93 words
A fixing apparatus comprising: a pair of rotary members for pinching therebetween and conveying therethrough a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; a first rectifier element connected between said rotary members, said first rectifier element being so connected that one of said rotary member which is contacted with the non-fixed toner image holds a charge having the same charge polarity as that of the toner; and a second rectifier element connected between the other of said rotary members and an earth.
Claim 24
Dependent Claim
25 words
A fixing apparatus according to claim 17, wherein said second rectifier element is connected in the same orientation as that of said first rectifier element.
Claim 25
Dependent Claim
18 words
A fixing apparatus according to claim 17 or 18, wherein said first and second rectifiers are diode, respectively.
Claim 26
Dependent Claim
70 words
A fixing apparatus comprising: a movable member used for pinching and conveying a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; and a rectifier element connected between said movable member and an earth, said rectifier element being so connected that said movable member holds a charge to prevent the toner on said supporting material from transferring from said supporting material.
Claim 27
Dependent Claim
70 words
A fixing apparatus comprising: a movable member used for pinching and conveying a supporting material bearing a non-fixed toner image thereon, thereby fixing the non-fixed toner image on said supporting material; and a rectifier element connected between said movable member and an earth, said rectifier element being so connected that said movable member holds a charge to prevent the toner on said supporting material from transferring from said supporting material.
References Cited (Backward Citations)
No citation records indexed.
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