EP0436955B1 - Appareil de fixage d'images dont la température de référence peut être changée - Google Patents

Appareil de fixage d'images dont la température de référence peut être changée Download PDF

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Publication number
EP0436955B1
EP0436955B1 EP90125761A EP90125761A EP0436955B1 EP 0436955 B1 EP0436955 B1 EP 0436955B1 EP 90125761 A EP90125761 A EP 90125761A EP 90125761 A EP90125761 A EP 90125761A EP 0436955 B1 EP0436955 B1 EP 0436955B1
Authority
EP
European Patent Office
Prior art keywords
temperature
film
heater
fixing
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90125761A
Other languages
German (de)
English (en)
Other versions
EP0436955A2 (fr
EP0436955A3 (en
Inventor
Shigeo C/O Canon Kabushiki Kaisha Kimura
Kensaku C/O Canon Kabushiki Kaisha Kusaka
Atsushi C/O Canon Kabushiki Kaisha Hosoi
Akira C/O Canon Kabushiki Kaisha Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of EP0436955A2 publication Critical patent/EP0436955A2/fr
Publication of EP0436955A3 publication Critical patent/EP0436955A3/en
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Publication of EP0436955B1 publication Critical patent/EP0436955B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2039—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/2003—Structural features of the fixing device
    • G03G2215/2016—Heating belt
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/2003—Structural features of the fixing device
    • G03G2215/2016—Heating belt
    • G03G2215/2035—Heating belt the fixing nip having a stationary belt support member opposing a pressure member
    • G03G2215/2038—Heating belt the fixing nip having a stationary belt support member opposing a pressure member the belt further entrained around one or more rotating belt support members

Definitions

  • the present invention relates to an image heat-fixing apparatus wherein a recording material bearing a visualized image is urged through a film toward the heater, by which the image is fixed.
  • a heat-roller type image fixing system is widely used.
  • this system involves a problem in that the waiting period is long until the surface of the heating roller reaches a predetermined temperature.
  • Image fixing apparatus are also known from EP-A-0 295 901 and DE-A-2 653 486.
  • the inventors have made thermal analysis on the relationship between the surface temperature of the fixing film immediately before the nip (the temperature on that surface of the fixing film which is contactable to the toner image of the recording material) in other words, the initial surface temperature and the temperature increase with time after entering the nip.
  • Figures 9A and 9B The results are shown in Figures 9A and 9B, wherein Figure 9A relates to the fixing film having a thickness of 40 microns, and Figure 9B relates to the fixing film having a thickness of 80 microns.
  • a curve (1) represents the film surface temperature at which the image fixing operation is possible (fixable temperature which is approximately 200 °C in this Example);
  • a curve (2) represents the surface temperature of the fixing film when the initial surface temperature is 130 °C;
  • a curve (3) represents the fixing film surface temperature when the initial temperature is 20 °C.
  • the temperature of the heater is increased in an apparatus wherein the recording sheet is separated from the film when the temperature of the toner is higher than the glass transition point, a high temperature toner offset can occur due to the overfusing of the toner if the continuous fixing operation is carried out.
  • Figure 1 is a sectional view of an image fixing apparatus according to an embodiment of the present invention.
  • Figure 2 is a sectional view of an image fixing apparatus according to another embodiment of the present invention.
  • Figure 3 is an enlarged sectional view of a temperature detecting unit for detecting a fixing film temperature.
  • Figure 4 is a graph of a fixing film temperature immediately before the fixing nip, a heater temperature, a high temperature offset temperature and a minimum fixable temperature.
  • Figure 5 is a graph of a fixing film temperature and a follower roller temperature during the fixing operation and during non-operation.
  • Figure 6 shows a part of the fixing apparatus, illustrating a temperature detecting element for the follower roller.
  • Figure 7 is a graph of relations among an image fixing film temperature, a heater temperature, a high temperature offset temperature and a minimum fixable temperature.
  • Figure 8 is a sectional view of an example of an image forming apparatus.
  • Figures 9A and 9B are graphs of a relation between a time period in which the fixing film is in the nip and a fixing film surface temperature, when the thickness of the fixing film is 40 microns and 80 microns.
  • the image forming apparatus is an image transfer type electrophotographic apparatus which comprises a reciprocable original supporting carriage and a rotatable drum.
  • the apparatus comprises a casing 100, a reciprocable original supporting carriage 1 made of transparent material such as glass or the like disposed above the top plate 100a of the casing 100.
  • the original carriage 1 reciprocates above the plate 100a in the left and right directions (a-a′).
  • An original G is placed face down on the original carriage 1 in alignment with the reference position. Then, the original is covered with an original cover 1a.
  • a slit opening 100b is formed in the top plate 100a, extending in a direction perpendicular to the reciprocal movement direction of the original carriage 1 (perpendicular to the sheet of the drawing). Through the slit 100b the original is illuminated.
  • the surface of the original image of the original G placed on the original carriage 1 is passed by the slit opening 100b from the right side to the left side during the forward movement ( a ) of the original carriage 1.
  • the original image receives the light L through the slit 100b through the transparent original carriage 1, so that the original is scanned.
  • the light reflected by the original is imaged on the surface of the photosensitive drum 4 through an array of imaging elements 2 having short focus and small diameter.
  • the photosensitive drum 4 has a photosensitive layer such as a zinc oxide photosensitive layer or an organic photosensitive layer, and is rotatable in a direction indicated by an arrow b at a predetermined peripheral speed about the central axis 4a. During the rotation, the photosensitive member is uniformly charged to a positive or negative polarity. The surface thereof thus charged is exposed to the image light from the original through a slit, so that an electrostatic latent image is formed on the photosensitive drum 4.
  • a photosensitive layer such as a zinc oxide photosensitive layer or an organic photosensitive layer
  • the electrostatic latent image is visualized sequentially by a developing device 6 with toner made of heat-softenable or -fusible resin material or the like. Then, the toner image (visualized image) is conveyed to an image transfer station having a transfer discharger 9.
  • a cassette S accommodates transfer sheet materials (recording material). From the cassette S, a sheet is singled out by rotation of a pick-up roller, and is fed to the photosensitive drum 4 by registration rollers 8 in such a timed relation that when the leading edge of the toner image reaches the transfer charger 9 position, the leading edge of the transfer sheet P reaches the position between the transfer discharger 9 and the photosensitive drum 4. To the surface of the thus fed transfer sheet, the toner image is sequentially transferred from the photosensitive drum 4 by the transfer discharger 9.
  • the transfer sheet having received the transferred image is separated from the surface of the photosensitive drum 4 by an unshown separating means, and is conveyed by a conveying device 10 to an image fixing apparatus 11 where it is subjected to an image fixing operation by heat so that the unfixed toner image Ta is fixed. Finally, it is discharged along a guide 43 and discharging rollers 44 to a discharge tray 12 outside the apparatus as a print (copy).
  • the surface of the photosensitive drum 4 after the image transfer is subjected to a cleaning operation by a cleaning device 13, by which the residual toner or contamination is removed, so that it is prepared for a repeated image forming operation.
  • FIG. 1 is a sectional view of the fixing apparatus 11.
  • a fixing film 25 in the form of an endless belt is stretched around four parallel members, namely, a left driving roller 26, a right follower roller 27, a low thermal capacity linear heater 20 fixed below a position between the rollers 26 and 27 and a guiding roller 26a disposed below the driving roller 26.
  • the follower roller 27 functions also as a tension roller for the film 25.
  • the fixing film 25 is rotated without crease, snaking movement or delay in the clockwise direction by the rotation of the driving roller 26 in the clockwise direction, at a peripheral speed which is the same as the conveying speed of the transfer sheet P (recording material) having the unfixed toner image Ta conveyed from the image forming station 9.
  • a pressing member 28 in the form of a pressing roller has a rubber elastic layer made of silicone rubber or the like having a good parting property. It presses the bottom travel of the fixing film 25 to the bottom surface of the heater 20 by urging means with a total pressure of 4 - 7 kg, for example. It rotates codirectionally with the transfer sheet P conveyance, that is, in the counterclockwise direction.
  • the fixing film 25 in the form of an endless belt is repeatedly used for heating and fixing the toner image, it has a sufficient heat-durability, parting property and durability.
  • the total thickness thereof is not more than 100 microns, and preferably not more than 40 microns.
  • It may be a single layer film of a heat resistive resin such as PI (polyimide), PEI (polyether imide) or PFA (copolymer of tetrafluoroethylene-perfluoroalkyl-vinylether), or it may be a multi-layer film including a thicker film of 20 microns coated with a parting layer of 10 microns at least on the side contactable to the image, the coating being made of PTFE resin (tetrafluoroethylene resin) added by electrically conductive material.
  • PI polyimide
  • PEI polyether imide
  • PFA copolymer of tetrafluoroethylene-perfluoroalkyl-vinylether
  • the heater 20 comprises a heater support 21 extended in a lateral direction (perpendicular to the fixing film 25 moving direction) and having a high rigidity, heat-durability and insulating property.
  • a heater substrate 22 of good heat conductive material is mounted on the bottom side of the support along the length of the support 21.
  • a heat generating resistor 23 is mounted on the film side of the heater substrate 22, and the heat generating resistor 23 instantaneously generates heat upon electric power supply thereto.
  • a temperature detecting element 24 is provided at the opposite side of the heater substrate 22 to detect the temperature of the heater substrate 22.
  • the heater support 21 provides the entire mechanical strength of the heater and is made of a heat-durable resin material such as PPS (polyphenylene sulfide), PAI (polyamide imide), PI (polyimide), PEEK (polyether etherketone) or a liquid crystal polymer material or a compound material of such a resin material and a ceramic, metal, glass or the like material.
  • a heat-durable resin material such as PPS (polyphenylene sulfide), PAI (polyamide imide), PI (polyimide), PEEK (polyether etherketone) or a liquid crystal polymer material or a compound material of such a resin material and a ceramic, metal, glass or the like material.
  • An example of the heater substrate 22 has a thickness of 1.0 mm, a width of 10 mm and a length of 240 mm, made of alumina.
  • heat generating element is in the form of an electric resistor material such as Ag/Pt, RuO2, Ta2N or the like applied on the bottom surface of the substrate 22 along a substantial center line of the substrate 22 with a width of 1.0 mm, by screen printing or the like.
  • the heat generating element 23 is a linear or stripe element having a low thermal capacity and activatable by electric power.
  • a temperature detecting element 24 is in the form of a temperature sensor having a low thermal capacity in the form of a Pt film or thermister. It is applied on the top surface of the substrate 22 along a substantially central longitudinal line of the top surface (opposite from the heat generating element 23 side). In this embodiment, the temperature of the substrate 22 having the good thermal conductivity is detected by the temperature sensor 24 as the temperature of the heater 20.
  • the heat generating element 23 is connected to a power source at the opposite longitudinal ends to generate the heat along the entire length of the heat generating element 23.
  • the heat generating element is supplied with electric power on the basis of an output of a fixing film temperature detecting unit 31 which will be described hereinafter and a set (target) temperature so as to compensate the energy emission.
  • the fixing film 25 is not limited to the form of the endless belt. It may be as shown in Figure 2, in the form of a film rolled on a feeding shaft 41 and a take-up shaft 42 and stretched therebetween and between the heater 20 and the pressing roller 28 below a guide roller 26a.
  • the fixing film 23 in this case is advanced from the feeding shaft 41 to the take-up shaft 27 at the same speed as the speed of the transfer sheet P.
  • the heater 20 has a protection layer made of Ta2O5 or the like at the side contactable to the fixing film 25.
  • an unshown copy button is depressed, and when an image forming signal is produced, the power supply is effected to reach the set temperature of the heater determined in the manner which will be described hereinafter. After the set temperature is reached, the power supply is controlled to maintain the set temperature.
  • the transfer sheet P is conveyed to the fixing apparatus 11 from the transfer station 9 by the image forming operation responsive to the image formation start, and is conveyed into the nip N (fixing nip) formed between the fixing film 25 and a pressing roller 28 and by the heater 20 and the pressing roller 28, the heater 20 being temperature-controlled.
  • the sheet P having the unfixed toner image is passed through the fixing film N between the heater 20 and the pressing roller 28 together with the fixing film 20 in close contact with the bottom surface of the fixing film 25 moving at the same speed as the moving speed of the sheet P, without surface deviation and without crease. During this, the sheet P is pressed.
  • the heat generating element 23 at the bottom of the heater has a width w.
  • the heat generating element 23 is within the width of the fixing nip N, that is, the contact region between the bottom surface of the heater 20 and the top surface of the pressing roller 28 through the fixing film 25.
  • the toner image bearing surface of the sheet P receives heat through the fixing film 25 from the heat generating element 23, while it is passed through the fixing nip N with pressure-contact therebetween.
  • the toner image is fused by the high temperature and is softened and adhered on the surface of the sheet P (Tb).
  • the separation between the sheet P and the fixing film 25 occurs at the point of time when the sheet P has passed through the fixing nip N.
  • the temperature of the toner Tb is still higher than the glass transition point of the toner, and therefore, the adherence (bonding force) between the sheet P and the fixing film 25 is small. Therefore, the sheet P is smoothly separated substantially without toner offset to the fixing film 25 surface and substantially without wrapping of the sheet P on the film 25 surface due to improper separation.
  • the toner Tb having the temperature higher than the glass transition point has moderate rubber properties, the toner image surface at the time of separation does not completely follow the surface property of the fixing film so that it has proper roughness. With the surface property maintained, the toner image is cooled and solidified, and therefore, the toner image surface after the image fixing is not too glossy, and therefore, the quality thereof is high.
  • the sheet P After the sheet P is separated from the fixing film 25, it is guided along a guide 43 to the discharging roller couple 44. During this, the temperature of the toner Tb increases from the temperature above the glass transition point decreases by spontaneous cooling down to a point lower than the glass transition point, and therefore, it is solidified into a toner image Tc. The sheet P having the fixed image is discharged onto the tray.
  • the temperature control of the heater will be described.
  • FIGS 1 and 2 there is shown a temperature detecting unit 31 disposed in contact with an inside surface of the fixing film 25 upstream of the fixing nip N with respect to the movement direction of the fixing film.
  • the unit 31 comprises a silicone sponge 32, a temperature detecting element 33 embedded therein and a PTFE tape 34 thereon having a good sliding property.
  • the unit 31 is in contact with the fixing film to detect the temperature of the inside of the fixing film of that portion thereof which is immediately before the fixing nip N, before the heater is energized with electric power.
  • the information of the detected temperature is fed back to a microcomputer M of a heater control system as a controlling factor.
  • the inventors' experiments using a commercially available toner for a Canon FC copying machine have shown that if the fixing film has a temperature of 20 °C immediately before the nip, the sufficient image fixing operation is not possible unless the temperature of the heater 20 is maintained above 190 °C (minimum fixable temperature); and that if the temperature is not lower than 210 °C, the toner is fused too much with the result of toner offset. As shown in Figure 5, the respective temperatures are different depending on the temperature of the fixing film immediately before the nip.
  • the set temperature of the heater control system is changed using a microcomputer, in accordance with the temperature of the fixing film detected by the temperature detecting unit 31 in accordance with the table 1 which is determined on the basis of the results shown in Figure 5.
  • the set temperature is selected to maintain 200 °C during the fixing operation.
  • the temperature of the fixing film is increased, and it becomes 31 - 60 °C, the temperature of 195 °C is selected, and further when the temperature becomes 61 - 100 °C, the temperature is selected to be 190 °C.
  • the control temperature is lowered to 185 °C.
  • the good fixed images can be produced without improper image fixing attributable to the low temperature of the fixing film and without the high temperature toner offset attributable to the too high temperature of the fixing film during a long continuous fixing operation.
  • the temperature of the fixing film is directly detected.
  • the thickness of the fixing film is very small, not more than 20 microns, for example, the fixing film may be damaged by the sliding with the temperature detecting unit 31.
  • a constant clearance 0.3 mm, for example
  • this embodiment is intended to particularly note that the temperature of the follower roller, the temperature of the pressing roller or another member other than the fixing film 25 changes in the similar manner as the fixing film temperature. Then, the temperature of the member other than the fixing film 25 is detected to switch the control temperature for the heater is switched.
  • FIG 5 shows the temperature change of the fixing film 25 and the follower roller 27 when the fixing apparatus is stopped after it is operated for 10 min.
  • the temperature changes have a similarity.
  • the temperature detecting element 41 is used to detect the follower roller 27 temperature. When it detects a temperature not higher than 60 °C, the heater 20 is controlled to be 193 °C; and when it is higher than 60 °C, the heater 20 is controlled to be 188 °C.
  • the system in which the temperature of the fixing film is controlled on the basis of the detected temperature of the part other than the fixing film 25 is advantageous in that the contact of the temperature detecting element to the fixing film 25 is not required and that the durability of the fixing film 25 is increased.
  • the temperature of the follower roller 27 is detected, but it is a possible alternative that the temperature in the neighborhood of the fixing film 25, such as the temperature of the driving roller 25 or the pressing roller 28 is detected.
  • a non-contact type temperature sensor is effectively usable.
  • the temperature detecting element 24 for the heater 20 is used to detect the temperature of the heater prior to the start of the image fixing operation, and on the basis of the detection, the set temperature during the fixing operation is changed.
  • the power supply is such that the temperature of the heater 20 is 190 °C.
  • the heater 20 is controlled to be 185 °C from the first copy. By doing so, the sufficient image fixing power without toner offset can be provided.
  • the temperature of the fixing film increases by approximately 60 °C by the power supply for one minute (which corresponds to 5 sheets processing), until the temperature of the fixing film reaches approximately 140 °C.
  • the continuous energy supply period is counted from the start of the operation by the microcomputer, during the continuous operation, on the basis of which the temperature of the film can be predicted.
  • the control temperature for the heater 20 is switched to 185 °C.
  • the high temperature offset does not occur even if the control temperature is controlled on the basis of the temperature of the heater 20 before the start of the fixing operation and even if the fixing operation is carried out continuously.
  • the temperature of the fixing film 25 is predicted on the basis of the continuous power supply period, but it may be effected on the basis of the number of continuously processed sheets.
  • the setting temperature of the control system is changed in the foregoing embodiment, but it is a possible alternative to change the power supply to provide the same effects on the basis of the detection of the film temperature or the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Claims (10)

  1. Appareil (11) de fixage d'images, comportant :
    a) un élément chauffant (20) maintenu à une température régulée ; et
    b) un film (25) mobile avec la surface d'un support (P) d'enregistrement qui porte une image non fixée, caractérisé en ce que
    c) ledit film (25) et ledit support (P) d'enregistrement sont séparés l'un de l'autre dans une position en aval d'une position de chauffage dudit élément chauffant (20) par rapport au sens du mouvement dudit film (25), tandis que la température d'un toner est supérieure au point de transition vitreuse dudit toner ;
    d) un élément (31 ; 41 ; 24) de détection de température est prévu pour détecter la température dudit film (25) ou d'un élément (27) en contact avec ledit film ; et en ce que
    e) des moyens (M) de commande sont prévus pour modifier le niveau de ladite température régulée ou d'une énergie électrique fournie audit élément chauffant (20) sur la base d'un signal de sortie dudit élément (31 ; 41 ; 24) de détection de température avant le commencement d'une opération de fixage d'images effectuée par ledit appareil de fixage d'images.
  2. Appareil selon la revendication 1, caractérisé en ce que ledit élément (24) de détection de température détecte la température dudit élément chauffant (20), dans lequel, pendant l'opération de fixage, lesdits moyens (M) de commande commandent l'énergie fournie audit élément chauffant (20) pour établir ledit niveau de ladite température régulée dudit élément chauffant (20).
  3. Appareil selon la revendication 1 ou 2, caractérisé en ce que ladite température régulée est déterminée par lesdits moyens (M) de commande avant le commencement de la fourniture d'énergie audit élément chauffant.
  4. Appareil selon la revendication 1 ou 3, caractérisé en ce que ledit élément (31) de détection de température détecte la température d'un côté dudit film (25) pouvant entrer en contact avec ladite image non fixée.
  5. Appareil selon la revendication 1 ou 3, caractérisé en ce que ledit élément (41) de détection de température détecte la température dudit élément (27) en contact avec un côté dudit film (25) opposé à un autre côté dudit film (25) pouvant entrer en contact avec ladite image non fixée.
  6. Appareil selon l'une quelconque des revendications 1 à 5, caractérisé en ce que ledit élément chauffant (20) est fixé pendant l'opération de fixage, et ledit film (25) est en contact de glissement avec ledit élément chauffant (20).
  7. Appareil selon l'une quelconque des revendications 1 à 6, caractérisé en ce que ledit élément chauffant comporte une plaque de base (22) et une couche (23) à résistance de génération de chaleur sur un côté tourné vers le film de ladite plaque de base (22), générant de la chaleur lorsqu'elle est alimentée en énergie électrique, et en ce que la chaleur provenant de ladite couche (23) à résistance de génération de chaleur est transférée à ladite image non fixée sans couche d'air entre elles.
  8. Appareil selon l'une quelconque des revendications 1 à 7, caractérisé en ce que ledit film (25) se présente sous la forme d'une bande sans fin.
  9. Appareil selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'épaisseur dudit film (25) n'est pas supérieure à 100 micromètres.
  10. Appareil selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'épaisseur dudit film (25) n'est pas supérieure à 40 micromètres.
EP90125761A 1990-01-09 1990-12-28 Appareil de fixage d'images dont la température de référence peut être changée Expired - Lifetime EP0436955B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002317A JP2833088B2 (ja) 1990-01-09 1990-01-09 定着装置
JP2317/90 1990-01-09

Publications (3)

Publication Number Publication Date
EP0436955A2 EP0436955A2 (fr) 1991-07-17
EP0436955A3 EP0436955A3 (en) 1992-07-01
EP0436955B1 true EP0436955B1 (fr) 1995-05-10

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EP (1) EP0436955B1 (fr)
JP (1) JP2833088B2 (fr)
KR (1) KR940010610B1 (fr)
DE (1) DE69019331T2 (fr)

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JP2727899B2 (ja) * 1992-11-13 1998-03-18 キヤノン株式会社 像加熱装置及び画像形成装置
JP3244838B2 (ja) * 1993-02-16 2002-01-07 キヤノン株式会社 定着装置
JP3634395B2 (ja) * 1994-02-21 2005-03-30 キヤノン株式会社 画像形成装置
US6968137B2 (en) 2002-02-28 2005-11-22 Matsushita Electric Industrial Co., Ltd. Image heating device, image forming apparatus, image copying machine, and method for controlling temperature
US6934483B2 (en) 2002-02-28 2005-08-23 Matsushita Electric Industrial Co., Ltd. Image heating device, image forming apparatus, image copying machine, and method for controlling temperature
JP4078235B2 (ja) 2003-03-26 2008-04-23 キヤノン株式会社 加熱装置
JP5317682B2 (ja) * 2008-12-24 2013-10-16 キヤノン株式会社 画像加熱装置
JP6119893B1 (ja) * 2016-03-04 2017-04-26 富士ゼロックス株式会社 記録材加熱装置および画像形成装置

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Publication number Priority date Publication date Assignee Title
DE2653486A1 (de) * 1976-11-25 1978-06-01 Reinhold H Dr Epping Verfahren und vorrichtung zur fixierung elektrophotografisch erzeugter bilder auf einer unterlage
US4672177A (en) * 1985-11-12 1987-06-09 International Business Machines Corporation Environmental sensor control of a heated fuser
EP0295901B1 (fr) * 1987-06-16 1995-12-20 Canon Kabushiki Kaisha Appareil de fixage d'images

Also Published As

Publication number Publication date
EP0436955A2 (fr) 1991-07-17
EP0436955A3 (en) 1992-07-01
DE69019331D1 (de) 1995-06-14
JP2833088B2 (ja) 1998-12-09
JPH03208076A (ja) 1991-09-11
KR910014775A (ko) 1991-08-31
DE69019331T2 (de) 1995-10-05
KR940010610B1 (ko) 1994-10-24

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