Patent US2067981A successfully refreshed from Google Patents.
Patent EP0295901A2 successfully refreshed from Google Patents.
EP0295901A2
Expired / Lapsed
EP
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An image fixing apparatus
Assignee: Canon Inc
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Filing: 1988-06-16
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Granted: —
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Expires: 2008-06-16
Abstract
Abstract An image fixing apparatus for fixing an unfixed image (T) formed on an image carrying member (P), includes a sheet member (23) movable together with the image carrying member in contact with the unfixed image carried thereon, and a heat generating element (28) contacted to such a side of the sheet member as is opposite to a side thereof contactable to the unfixed image, the heat generating element being fixed in use.
Inventors
- 👤 Hiromitsu Hirabayashi
- 👤 Kensaku Kusaka
- 👤 Atsushi Arai
- 👤 Yoshiaki Takayanagai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 07:54
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2009; G03G2215/2016; G03G2215/2022; G03G2215/2035; G03G2215/2038
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
68 words
An image fixing apparatus for fixing an unfixed image formed on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; and a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image. said heat generating element being fixed in use.
Claim 2
Dependent Claim
68 words
An image fixing apparatus for fixing an unfixed image formed on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; and a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image. said heat generating element being fixed in use.
Claim 3
Dependent Claim
101 words
An image fixing apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image; and a contacting member for contacting a backside of the image carrying member at a position opposed to said heat generating element, said contacting member having a temperature in use which is lower than a fusing temperature of the toner.
Claim 4
Dependent Claim
101 words
An image fixing apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image; and a contacting member for contacting a backside of the image carrying member at a position opposed to said heat generating element, said contacting member having a temperature in use which is lower than a fusing temperature of the toner.
Claim 5
Dependent Claim
34 words
An apparatus according to Claim 2, wherein said contacting member includes a rotatable member for press-contacting the image carrying member to said sheet member and press-contacting said sheet member to said heat generating element.
Claim 6
Dependent Claim
14 words
An apparatus according to Claim 3, further comprising means for cooling said rotatable member.
Claim 7
Dependent Claim
18 words
An apparatus according to Claim 3 or 4, wherein said rotatable member is separable from said sheet member.
Claim 8
Dependent Claim
76 words
An image fixing apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; and a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image; and power supple means for intermittently supplying electric power to said heat generating element.
Claim 9
Dependent Claim
76 words
An image fixing apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; and a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image; and power supple means for intermittently supplying electric power to said heat generating element.
Claim 10
Dependent Claim
39 words
An apparatus according to Claim 6, wherein said heat generating means is substantially provided with temperature detecting means, and in accordance with an output of the temperature detecting means, the power supply to said heat generating element is controlled.
Claim 11
Dependent Claim
48 words
An apparatus according to Claim 7, wherein said heat generating element includes a heat generating portion for generating heat by being supplied with the power and a supporting member for supporting the heat generating portion, and wherein said temperature detecting means detects a temperature of the supporting member.
Claim 12
Dependent Claim
41 words
An apparatus according to Claim 7, wherein the intermittent power supply to said heat generating element is effected by pulse-wide power supply, and wherein width of power supply pulses is controlled in accordance with an output of said temperature detecting means.
Claim 13
Dependent Claim
42 words
An apparatus according to Claim 7, wherein said heat generating element includes a heat generating portion for generating heat by being supplied with the power, and wherein said temperature detecting means detects a temperature in the vicinity of the heat generating portion.
Claim 14
Dependent Claim
30 words
An apparatus according to Claim 7, wherein power supply to said heat generating element is controlled in accordance with a peak value of the output of said temperature detecting means.
Claim 15
Independent Claim
34 words
An apparatus according to any of Claims 6 to 11, further comprising safety means for shutting off the power supply to said heat generating element upon extreme temperature rise of said heat generating element.
Claim 16
Independent Claim
45 words
An apparatus according to any of Claims 6 to 12, wherein said heat generating element includes a linear heat generating layer which is fixed in use, said heat generating layer extending in a direction crossing with a direction of conveyance of the image carrying member.
Claim 17
Dependent Claim
151 words
An image fixing apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element including a heat generating portion extending in a direction crossing with a direction of conveyance of the image carrying member; and power supply means for intermittently supplying electric power to said heat generating element so as to satisfy the following: τ < 1 /Vp where τ is energy supply duration (ms) per one power supply by said power supply means; l is a heat generating width (micron) of said heat generating element; and Vp is a speed of the conveyance (mm,sec) of the image carrying member.
Claim 18
Dependent Claim
151 words
An image fixing apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element including a heat generating portion extending in a direction crossing with a direction of conveyance of the image carrying member; and power supply means for intermittently supplying electric power to said heat generating element so as to satisfy the following: τ < 1 /Vp where τ is energy supply duration (ms) per one power supply by said power supply means; l is a heat generating width (micron) of said heat generating element; and Vp is a speed of the conveyance (mm,sec) of the image carrying member.
Claim 19
Dependent Claim
42 words
An apparatus according to Claim 14, wherein the intermittent power supply to said heat generating element by said power supply means is effected pulse-wisely, and wherein the power supply duration per one power supply is equal to a width of a pulse.
Claim 20
Dependent Claim
152 words
An image fixing apparatus for fixing an unfixed image formed on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element including a heat generating portion extending in a direction crossing with a direction of conveyance of the image carrying member; and power supply means for intermittently supplying electric power to said heat generating element so as to satisfy the following: Vp/ 1 ≦ ν < 2Vp/ 1 where Vp is a speed of the conveyance (mm/sec) of the image carrying member; 1 is a heat generating width (micron) of said heat generating element; and ν is a frequency (1/ms) of the intermittent power supply to said heat generating element.
Claim 21
Dependent Claim
152 words
An image fixing apparatus for fixing an unfixed image formed on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element including a heat generating portion extending in a direction crossing with a direction of conveyance of the image carrying member; and power supply means for intermittently supplying electric power to said heat generating element so as to satisfy the following: Vp/ 1 ≦ ν < 2Vp/ 1 where Vp is a speed of the conveyance (mm/sec) of the image carrying member; 1 is a heat generating width (micron) of said heat generating element; and ν is a frequency (1/ms) of the intermittent power supply to said heat generating element.
Claim 22
Dependent Claim
27 words
An apparatus according to Claim 6 or 16, wherein the intermittent power supply by said power supply means is effected in the form of pulse-wise power supply.
Claim 23
Independent Claim
25 words
An apparatus according to any preceding claim, wherein said sheet member is non-endless wound sheet member, said apparatus comprising means for rewinding said sheet member.
Claim 24
Dependent Claim
18 words
An apparatus according to Claim 18, further comprising means for detecting a remaining amount of said sheet member.
Claim 25
Independent Claim
36 words
An apparatus according to any of claims 1 and 6 to 19, further comprising pressing means for press-contacting the image carrying member to said sheet member and press-contacting said sheet member to said heat generating member.
Claim 26
Dependent Claim
26 words
An apparatus according to Claim 20, wherein said pressing means is in the form of a rotatable member and is movable away from said sheet member.
Claim 27
Independent Claim
35 words
An apparatus according to any preceding claim, wherein the unfixed image is formed with toner which is heat-fusible, and wherein said sheet member and the image carrying member are separated after the toner is solidified.
Claim 28
Independent Claim
17 words
An apparatus according to any preceding claim, further comprising radiating means for promoting solidification of the toner.
Claim 29
Dependent Claim
89 words
An image forming apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; and a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element having a linear heat generating portion, and said heat generating portion being fixed in use and being maintained substantially at a predetermined temperature.
Claim 30
Dependent Claim
89 words
An image forming apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; and a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element having a linear heat generating portion, and said heat generating portion being fixed in use and being maintained substantially at a predetermined temperature.
Claim 31
Dependent Claim
49 words
An apparatus according to Claim 24, further comprising detecting means for substantially detecting a temperature of said heat generating element, wherein power supply to said heat generating portion is controlled in accordance with an output of said detecting means to maintain said heat generating element at the predetermined temperature.
Claim 32
Dependent Claim
22 words
An apparatus according to Claim 25, further comprising an insulating layer provided between said heat generating portion and said temperature detecting means.
Claim 33
Dependent Claim
125 words
An image forming apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element having a linear heat generating portion, and said heat generating portion being fixed in use; and a rotatable member for press-contacting the image carrying member to said sheet member and press-contacting said sheet member to said heat generating element; wherein said heat generating portion is within a width of contact area between said rotatable member and the image carrying member.
Claim 34
Dependent Claim
125 words
An image forming apparatus for fixing an unfixed image formed by toner on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon; a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element having a linear heat generating portion, and said heat generating portion being fixed in use; and a rotatable member for press-contacting the image carrying member to said sheet member and press-contacting said sheet member to said heat generating element; wherein said heat generating portion is within a width of contact area between said rotatable member and the image carrying member.
Claim 35
Dependent Claim
28 words
An apparatus according to Claim 27, wherein said heat generating portion is disposed within the width nearer to an image carrying member inlet side of the contact area.
Claim 36
Dependent Claim
42 words
An apparatus according to Claim 27, wherein the width of the contact area is larger at ends of said rotatable member in a direction of rotational axis thereof than at a middle position, whereas said heat generating member has a uniform width.
Claim 37
Dependent Claim
24 words
An apparatus according to Claim 29, wherein a width of the heat generating portion is smaller than a minimum width of the contact area.
Claim 38
Dependent Claim
103 words
3I. An image fixing apparatus for fixing an unfixed image formed on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon, said sheet member being movable along an endless path; a pair of rotatable members for moving said sheet member along the endless path; and a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element being disposed between said rotatable members and within an area defined by the endless path.
Claim 39
Dependent Claim
103 words
3I. An image fixing apparatus for fixing an unfixed image formed on an image carrying member, comprising: a sheet member movable together with the image carrying member in contact with the unfixed image carried thereon, said sheet member being movable along an endless path; a pair of rotatable members for moving said sheet member along the endless path; and a heat generating element contacted to such a side of said sheet member as is opposite to a side thereof contactable to the unfixed image, said heat generating element being disposed between said rotatable members and within an area defined by the endless path.
Claim 40
Independent Claim
21 words
An apparatus according to any of claims 14 to 23 and 31, wherein said heat generating element is fixed in use.
Claim 41
Dependent Claim
31 words
An apparatus according to Claim 31 or 32, wherein said heat generating element is disposed upstream of a center between said rotatable members with respect to movement of said sheet member.
Claim 42
Dependent Claim
35 words
An apparatus according to Claim 33, wherein a heat generating portion of said heat generating element is disposed upstream of a center between said rotatable members with respect to movement detection of said sheet member.
Claim 43
Independent Claim
44 words
An apparatus according to any of claims 1 to 23 and 31 to 34, wherein said sheet member includes a heat resistive base layer and a parting layer provided at least on the side of said sheet member remote from said heat generating element.
Claim 44
Dependent Claim
14 words
An apparatus according to Claim 35, wherein said parting layer is of fluorine resin.
References Cited (Backward Citations)
No citation records indexed.
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