Patent US5162634A successfully refreshed from Google Patents.
US5162634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image fixing apparatus
Assignee: Canon Inc
•
Filing: 1991-12-27
•
Granted: 1992-11-10
•
Expires: 2011-12-27
Abstract
Abstract An image heating apparatus includes a heater having a heating surface; a base member for supporting said heater, said base member having an edge; a holder for supporting said base member; a film movable with a recording material in sliding contact with the heating surface; wherein said holder has a rounded projection for preventing contact of said film with the edge.
Inventors
- 👤 Kensaku Kusaka
- 👤 Yoshihiko Suzuki
- 👤 Shigeo Kimura
- 👤 Atsushi Hosoi
- 👤 Hiroyuki Adachi
- 👤 Masahide Kinoshita
- 👤 Hidekazu Maruta
- 👤 Akira Yamamoto
- 👤 Ikuko Naruse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:16
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G15/2053; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2035; G03G2215/2038
Claims Analysis
Total Claims: 81
Claim 1
Independent Claim
61 words
An image heating apparatus, comprising: a heater having a heating surface; a base member for supporting said heater, said base member having an edge; a holder for supporting said base member; a film movable with a recording material in sliding contact with the heating surface; wherein said holder has a rounded projection for preventing contact of said film with the edge.
Claim 2
Dependent Claim
61 words
An image heating apparatus, comprising: a heater having a heating surface; a base member for supporting said heater, said base member having an edge; a holder for supporting said base member; a film movable with a recording material in sliding contact with the heating surface; wherein said holder has a rounded projection for preventing contact of said film with the edge.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein said base member is of ceramic material
Claim 4
Dependent Claim
42 words
An apparatus according to claim 1, wherein said base member has a high thermal conductivity and is provided on a side thereof opposite from a side supporting said heater with a temperature detecting element for controlling the power supply to said heater.
Claim 5
Dependent Claim
14 words
An apparatus according to claim 1, wherein said holder is of thermally insulating material.
Claim 6
Dependent Claim
31 words
An apparatus according to claim 1, wherein said base member has edges at its ends in a movement direction of said film, and said holder has projections at its opposite ends.
Claim 7
Dependent Claim
16 words
An apparatus according to claim 1, wherein said projection project beyond the edges toward said film.
Claim 8
Dependent Claim
21 words
An apparatus according to claim 1, further comprising an urging member for urging said heater, said film and the recording material.
Claim 9
Dependent Claim
46 words
An apparatus according to claim 1, wherein said image is a powder toner image, and wherein a temperature of toner constituting the toner image at a point where the recording medium is separated from said film is higher than a glass transition point of the toner.
Claim 10
Dependent Claim
17 words
An apparatus according to claim 1, wherein said film has a thickness not more than 100 microns.
Claim 11
Dependent Claim
17 words
An apparatus according to claim 9, wherein said film has a thickness not more than 40 microns.
Claim 12
Dependent Claim
17 words
An apparatus according to claim 1, wherein said film is in the form of an endless belt.
Claim 13
Dependent Claim
15 words
An apparatus according to claim 1, wherein said film is of heat resistive resin material.
Claim 14
Dependent Claim
15 words
An apparatus according to claim 1, wherein said holding member is of molded resin material.
Claim 15
Dependent Claim
16 words
An apparatus according to claim 1, wherein said apparatus heat-fixing the image on the recording material.
Claim 16
Dependent Claim
12 words
An apparatus according to claim 2, wherein the ceramic material is alumina.
Claim 17
Dependent Claim
19 words
An apparatus according to claim 3, wherein said temperature detecting element is between said base member and said holder.
Claim 18
Dependent Claim
55 words
An image heating apparatus, comprising: a heater having a heating surface; a base member for supporting said heater, said base member having an edge; a film movable with a recording material in a sliding contact with the heating surface; projection member mounted on said base member for preventing contact of said film with the edge.
Claim 19
Dependent Claim
55 words
An image heating apparatus, comprising: a heater having a heating surface; a base member for supporting said heater, said base member having an edge; a film movable with a recording material in a sliding contact with the heating surface; projection member mounted on said base member for preventing contact of said film with the edge.
Claim 20
Dependent Claim
35 words
An apparatus according to claim 17 wherein said base member has edges at its ends in a movement direction of said film, and said projection members is provided at opposite sides of said base member.
Claim 21
Dependent Claim
17 words
An apparatus according to claim 17, wherein said projection members project beyond the edges toward said film.
Claim 22
Dependent Claim
21 words
An apparatus according to claim 17, further comprising an urging member for urging said heater, said film and the recording material.
Claim 23
Dependent Claim
46 words
An apparatus according to claim 17, wherein said image is a powder toner image, and wherein a temperature of toner constituting the toner image at a point where the recording medium is separated from said film is higher than a glass transition point of the toner.
Claim 24
Dependent Claim
17 words
An apparatus according to claim 17, wherein said film has a thickness not more than 100 microns.
Claim 25
Dependent Claim
17 words
An apparatus according to claim 17, wherein said film has a thickness not more than 40 microns.
Claim 26
Dependent Claim
17 words
An apparatus according to claim 17, wherein said film is in the form of an endless belt.
Claim 27
Dependent Claim
15 words
An apparatus according to claim 17, wherein said film is of heat resistive resin material.
Claim 28
Dependent Claim
16 words
An apparatus according to claim 17, wherein said apparatus heat-fixing the image on the recording material.
Claim 29
Dependent Claim
14 words
An apparatus according to claim 17, wherein said base member is of ceramic material.
Claim 30
Dependent Claim
12 words
An apparatus according to claim 27, wherein the ceramic material is alumina.
Claim 31
Dependent Claim
82 words
An image heating apparatus, comprising: a heating block including a heat generating resistor for generating heat upon electric power supply thereto, and a base member, having a rectangular cross-section, for supporting said heat generating resistor; a film movable with a recording material in sliding contact with the heating block, said film contacting said heating block at a central portion of said base member and not contacting said heating block at end portions thereof with respect to a movement direction of said film.
Claim 32
Dependent Claim
82 words
An image heating apparatus, comprising: a heating block including a heat generating resistor for generating heat upon electric power supply thereto, and a base member, having a rectangular cross-section, for supporting said heat generating resistor; a film movable with a recording material in sliding contact with the heating block, said film contacting said heating block at a central portion of said base member and not contacting said heating block at end portions thereof with respect to a movement direction of said film.
Claim 33
Dependent Claim
41 words
An apparatus according to claim 29, further comprising a holder for insulatively holding said heating block, said holder having a guiding portion for guiding said film with a gap from said heating block at the end portion of said base member
Claim 34
Dependent Claim
14 words
An apparatus according to claim 30, wherein said holder is of thermally insulating material.
Claim 35
Dependent Claim
15 words
An apparatus according to claim 30, wherein said holding member is of molded resin material.
Claim 36
Dependent Claim
14 words
An apparatus according to claim 29, wherein said base member is of ceramic material.
Claim 37
Dependent Claim
12 words
An apparatus according to claim 33, wherein the ceramic material is alumina.
Claim 38
Dependent Claim
46 words
An apparatus according to claim 29, wherein said base member has a high thermal conductivity and is provided on a side thereof opposite from a side supporting said heat generating resistor with a temperature detecting element for controlling the power supply to said heat generating resistor.
Claim 39
Dependent Claim
21 words
An apparatus according to claim 29, further comprising an urging member for urging said heater, said film and the recording material.
Claim 40
Dependent Claim
46 words
An apparatus according to claim 29, wherein said image is a powder toner image, and wherein a temperature of toner constituting the toner image at a point where the recording medium is separated from said film is higher than a glass transition point of the toner.
Claim 41
Dependent Claim
17 words
An apparatus according to claim 29, wherein said film has a thickness not more than 100 microns.
Claim 42
Dependent Claim
17 words
An apparatus according to claim 38, wherein said film has a thickness not more than 40 microns.
Claim 43
Dependent Claim
17 words
An apparatus according to claim 29, wherein said film is in the form of an endless belt.
Claim 44
Dependent Claim
15 words
An apparatus according to claim 29, wherein said film is of heat resistive resin material.
Claim 45
Dependent Claim
16 words
An apparatus according to claim 29, wherein said apparatus heat-fixing the image on the recording material.
Claim 46
Dependent Claim
62 words
An image heating apparatus, comprising: a heater having a heating surface; a base member for supporting said heater; a film movable with a recording material in sliding contact with the heating surface; a projection portion, beyond said base member toward said film, for guiding movement of said film; wherein said heater, said base member and said projecting portion provide a convex portion.
Claim 47
Dependent Claim
62 words
An image heating apparatus, comprising: a heater having a heating surface; a base member for supporting said heater; a film movable with a recording material in sliding contact with the heating surface; a projection portion, beyond said base member toward said film, for guiding movement of said film; wherein said heater, said base member and said projecting portion provide a convex portion.
Claim 48
Dependent Claim
32 words
An apparatus according to claim 43, wherein said heater, said base member, said projection portion and said film provide a closed region in a cross-section along a movement direction of said film.
Claim 49
Dependent Claim
21 words
An apparatus according to claim 43, further comprising a holder for supporting said base, and said holder having a projection portion.
Claim 50
Dependent Claim
45 words
An apparatus according to claim 43, wherein said projecting portion is provided at each of upstream and downstream sides of said heating surface with respect to a movement direction of said film, and wherein the convex region is also provided at each of the sides.
Claim 51
Dependent Claim
14 words
An apparatus according to claim 45, wherein said holder is of thermally insulating material.
Claim 52
Dependent Claim
15 words
An apparatus according to claim 45, wherein said holding member is of molded resin material.
Claim 53
Dependent Claim
14 words
An apparatus according to claim 43, wherein said base member is of ceramic material.
Claim 54
Dependent Claim
12 words
An apparatus according to claim 49, wherein the ceramic material is alumina.
Claim 55
Dependent Claim
42 words
An apparatus according to claim 43, wherein said base member has a high thermal conductivity and is provided on a side thereof opposite from a side supporting said heater with a temperature detecting element for controlling the power supply to said heater.
Claim 56
Dependent Claim
21 words
An apparatus according to claim 43, further comprising an urging member for urging said heater, said film and the recording material.
Claim 57
Dependent Claim
46 words
An apparatus according to claim 43, wherein said image is a powder toner image, and wherein a temperature of toner constituting the toner image at a point where the recording medium is separated from said film is higher than a glass transition point of the toner.
Claim 58
Dependent Claim
17 words
An apparatus according to claim 43, wherein said film has a thickness not more than 100 microns.
Claim 59
Dependent Claim
17 words
An apparatus according to claim 54, wherein said film has a thickness not more than 40 microns.
Claim 60
Dependent Claim
17 words
An apparatus according to claim 43, wherein said film is in the form of an endless belt.
Claim 61
Dependent Claim
15 words
An apparatus according to claim 43, wherein said film is of heat resistive resin material.
Claim 62
Dependent Claim
16 words
An apparatus according to claim 43, wherein said apparatus heat-fixing the image on the recording material.
Claim 63
Dependent Claim
53 words
An image heating apparatus, comprising: a heater having a heating surface; a base member for supporting said heater; a heat-insulative holder for supporting said base member; a film movable with a recording material in sliding contact with the heating surface; wherein said holder has a channel-like portion, where said base member is supported.
Claim 64
Dependent Claim
53 words
An image heating apparatus, comprising: a heater having a heating surface; a base member for supporting said heater; a heat-insulative holder for supporting said base member; a film movable with a recording material in sliding contact with the heating surface; wherein said holder has a channel-like portion, where said base member is supported.
Claim 65
Dependent Claim
23 words
An apparatus according to claim 59, wherein said channel-like portion has a depth which is larger than a thickness of said base member.
Claim 66
Dependent Claim
14 words
An apparatus according to claim 60, wherein said base member has a rectangular cross-section.
Claim 67
Dependent Claim
33 words
An apparatus according to claim 59, wherein said temperature detecting element is mounted on said base member to detect a temperature of said base member, wherein said holder covers said temperature detecting element.
Claim 68
Dependent Claim
28 words
An apparatus according to claim 59, wherein said film is of resin material, and said heater and said base member are enclosed by said film and said holder.
Claim 69
Dependent Claim
32 words
An apparatus according to claim 62, wherein said film is of resin material, and said heater, said base member and said temperature detecting element are enclosed by said film and said holder.
Claim 70
Dependent Claim
13 words
An apparatus according to claim 59, wherein said base member is thermally conductive.
Claim 71
Dependent Claim
38 words
An apparatus according to claim 65, wherein a temperature detecting element for detecting a temperature of said base member to control power supply to said heater is mounted on aside of said base member remote from said heater.
Claim 72
Dependent Claim
14 words
An apparatus according to claim 59, wherein said base member is of ceramic material.
Claim 73
Dependent Claim
12 words
An apparatus according to claim 67, wherein the ceramic material is alumina.
Claim 74
Dependent Claim
21 words
An apparatus according to claim 59, further comprising an urging member for urging said heater, said film and the recording material.
Claim 75
Dependent Claim
46 words
An apparatus according to claim 59, wherein said image is a powder toner image, and wherein a temperature of toner constituting the toner image at a point where the recording medium is separated from said film is higher than a glass transition point of the toner.
Claim 76
Dependent Claim
17 words
An apparatus according to claim 59, wherein said film has a thickness not more than 100 microns.
Claim 77
Dependent Claim
17 words
An apparatus according to claim 71, wherein said film has a thickness not more than 40 microns.
Claim 78
Dependent Claim
17 words
An apparatus according to claim 59, wherein said film is in the form of an endless belt.
Claim 79
Dependent Claim
15 words
An apparatus according to claim 59, wherein said holding member is of molded resin material.
Claim 80
Dependent Claim
16 words
An apparatus according to claim 59, wherein said apparatus heat-fixing the image on the recording material.
Claim 81
Dependent Claim
12 words
An apparatus according to claim 17, wherein said projection member is rotatable.
References Cited (Backward Citations)
US3811828A
Cited
US3810735A
Cited
US4034189A
Cited
US4566779A
Cited
US4575619A
Cited
US4780742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |