EP1156395A2 - Méthode et dispositif pour générer et réguler des valeurs de température sur un rouleau de fixage d'une unité de fixage d'une image de toner - Google Patents

Méthode et dispositif pour générer et réguler des valeurs de température sur un rouleau de fixage d'une unité de fixage d'une image de toner Download PDF

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Publication number
EP1156395A2
EP1156395A2 EP01107860A EP01107860A EP1156395A2 EP 1156395 A2 EP1156395 A2 EP 1156395A2 EP 01107860 A EP01107860 A EP 01107860A EP 01107860 A EP01107860 A EP 01107860A EP 1156395 A2 EP1156395 A2 EP 1156395A2
Authority
EP
European Patent Office
Prior art keywords
fixing
fixing roller
roller
blowing
unit
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.)
Withdrawn
Application number
EP01107860A
Other languages
German (de)
English (en)
Other versions
EP1156395A3 (fr
Inventor
Franz Allmendinger
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
NexPress Solutions LLC
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 Eastman Kodak Co, NexPress Solutions LLC filed Critical Eastman Kodak Co
Publication of EP1156395A2 publication Critical patent/EP1156395A2/fr
Publication of EP1156395A3 publication Critical patent/EP1156395A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • G03G15/205—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 specially for the mode of operation, e.g. standby, warming-up, error
    • 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
    • G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/20—Humidity or temperature control also ozone evacuation; Internal apparatus environment control
    • G03G21/206—Conducting air through the machine, e.g. for cooling, filtering, removing gases like ozone
    • 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
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00666—Heating or drying device

Definitions

  • the invention relates to a method and a device for generating and controlling Temperature values on a fuser roller arranged in a duplicator and fixing unit that can be switched to different operating states for fixing on Transferring toner images.
  • fixing units with a device and a method of the aforementioned Kind known that are used in copiers, the rotatable fuser roller together with a pressure roller that can be placed parallel to its outer circumferential surface a fixing nip for passing the toner image bearing recording materials forms; the fixing roller by means of a connected to a control unit Heating means heatable and for generating and regulating the predetermined temperature values is switchable and its heating output is adjustable; the temperature values on the Outer peripheral surface of the fixing roller by means of at least one temperature sensor are detectable; and the fixing roller on its outer peripheral surface by one of one Controllable cooling unit supplied blown air flow is coolable.
  • US-A-5,787,321 discloses an apparatus for generating and controlling an operating / Fixing temperature values on the outer circumference of heatable, rotatable Fixing rollers of a fixing unit, the fixing rollers as a pair of rollers parallel to the axis are arranged, which has a heating roller and a pressure roller.
  • Several Temperature sensors and associated blower fans are axially along both Fuser rollers, axially spaced apart, upstream of the fuser rollers arranged, the axial section width of a blower or its Ventilation area that corresponds to the minimum width of a toner image-bearing sheet.
  • the disadvantage of this disclosed embodiment is that by means of the blow fans shown With a large blowing opening, targeted, uniform and intensive cooling via the entire axial length of the fixing rollers is only unsatisfactory. Furthermore is through the arrangement of the temperature sensors in the blower air flow of the blower fan an exact It is difficult to measure the temperature values on the outer peripheral surfaces of the fixing rollers. In addition, with regard to the rapid generation, regulation and change of temperature values, especially the fixing temperature, as well as in relation to a quick switchover to different operating states the heating output regulation / control used disadvantageous due to its sluggishness.
  • DE-25 07 559-A1 discloses an apparatus and a method for generating a Operating / fixing temperature values on the outer circumference of a heatable, in rotation operable fixing / heating roller of a fixing unit, the heating roller together with a pressure roller forms a pair of fixing rollers.
  • An air suction device is located above the pressure roller arranged to cool both roller surfaces.
  • the Suction device has a center to the sheet transport path or axially center to the Pressure roller lying on the air duct on the one hand with a single switching valve a vacuum generator unit is connected and on the other hand on both sides of the Air duct several narrow, parallel to each other, opening into the air duct has air channels / tubes extending axially towards the ends of the pressure roller.
  • the Air tubes that are radially spaced from the surface of the pressure roller are along the Outer circumference, in the direction of rotation of the pressure roller at an angular distance of about Arranged 5-10 degrees in a row.
  • the tracheae each have in their tube wall several air nozzles lined up along the axial extension of the tubes, the are aligned with the pressure roller in such a way that only the end areas or over the Blade width protruding ends of the pairs of rollers to avoid overheating be cooled.
  • the generation and control of the temperature values, in particular the Fixing temperature, as well as switching to different operating states takes place in the essentially through a heating power control.
  • the disadvantage of this disclosed embodiment is that by means of the air suction device shown, which are arranged in the area of the pressure roller and their cooling in essentially only affects the axial end areas of the rollers, a targeted, uniform and intensive cooling of the fusing rollers over their entire axial length not possible.
  • Another disadvantage is that the air tubes for varying the Cooling cannot be controlled individually.
  • Control and change of temperature values in particular the fixing temperature, as well as in with regard to a quick switchover to different operating states Heating power regulation / control disadvantageous due to its inertia.
  • the invention is therefore based on the object of a method and an apparatus to create the type mentioned, which does not have these disadvantages, but which is a fast, accurate and easy operation of a fuser, especially a quick and accurate generation and control of predetermined temperature values a fixing roller in various operating states for acceleration and Improvement of a fixing process in an automated environment guaranteed.
  • the object is achieved with a method according to claim 1 in that that the generation and control of the predetermined temperature values on Outer peripheral surface of the fixing roller essentially by means of a controllable and controllable blowing air flow of the cooling unit is carried out; and controlling and regulating of the blown air flow as a function of a determined core temperature Fuser roller is done.
  • the method is also advantageously characterized in that a first predetermined temperature value of the fixing roller by means of the constant maximum Heating power operated heating means and from reaching the predetermined first Temperature value by means of the with small to medium (0 to 50%) air performance Blown air flow of the cooling unit in a first and second operating state Fuser is generated and regulated; that a second predetermined, lower Temperature value of the fusing roller while the maximum heating power remains constant using the with maximum (100%) to average (approx.
  • the cooling unit at least one substantially tubular, with a Compressed air source connected blowing agent, which is parallel to the axis of the fixing roller and is arranged radially spaced from the outer circumferential surface, by means of a directed and concentrated blow air flow to generate a cooling strip on the Outer peripheral surface of the fixing roller can be generated, and its air power by means of the control unit that acts on the compressed air source can be controlled and regulated.
  • the blowing agent of the cooling unit is advantageously based on a conveying direction the toner image bearing recording medium, substantially upstream of the Fixing nip and in an area of the fixing roller spaced from this fixing nip arranged; the blowing agent has in its tube wall at least one along its axial Extension extending slot-shaped air nozzle or more along its axial Expansion air jets to generate the concentrated and directional Blown air flow, by means of which on the outer circumferential surface of the fixing roller entire axial length of the fixing roller extending cooling strip with a predetermined Width can be generated; and is one through the individual cooling strips of the blowing agent itself resulting width of a total cooling strip substantially equal to or less than one quarter of the outer circumference of the fuser roller.
  • FIGS. 1 to 4 relates to a preferred one Embodiment of the device according to the invention and the method for generating and regulating temperature values on a rotating fuser roller one in one Duplicating device arranged fixing unit for fixing on Recording media transferred toner images.
  • the device is known in a fixing unit of a duplicating device kind, such as copier arranged.
  • the inventive device for generating shown schematically in FIGS. 1 and 2 and regulating temperature values Ts; T1; T2; T3 is on a fixing roller FR in Different operating states W; A; F switchable fixing unit for fixing on Recording materials P transferred toner images arranged in a conventional, Copier, not shown, is attached.
  • the usual, not shown Hollow fixing roller FR which can rotate, forms within the fixing unit together with a rotatable, axially parallel on its outer peripheral surface FS Press roller PR a fixing gap N for passing through the toner image bearing Recording materials, in the transport direction X shown, the Recording materials, for example in the form of sheets of paper or sheets of film could be.
  • the fixing roller FR is centered in its hollow interior in the axis of rotation arranged and via a semiconductor relay RS with an output circuit O one Microprocessor unit CP having control unit CU electrical connected / coupled heating means H1, such as heating lamp heatable.
  • the Heating means H1 is used to generate and regulate the predetermined ones Temperature values Ts; T1; T2; T3 by means of the control unit CU and the semiconductor relay RS switchable and adjustable in heating power Ph.
  • the rotatable pressure roller PR is also axially centered for heating arranged in its hollow interior, a heating medium H2 in the form of a heating lamp H2, the Heating power is kept constant at a predetermined value.
  • the fixing roller FR is also on its outer peripheral surface FS by means of one Cooling unit CO controllable from the control unit CU Blow air flow AJ coolable.
  • the cooling unit CO has an essentially tubular one with a compressed air source BL connected blowing agent AT, the axis parallel to the fixing roller FR and radial spaced from its outer circumferential surface FS is arranged in a stationary manner by means of the Directed and concentrated blow air flow AJ to produce a cooling strip CA.
  • the outer peripheral surface of the fixing roller can be generated, and its air power Pc by means of the control unit CU acting on the compressed air source BL is controllable and is adjustable.
  • Forming the directed and concentrated or delimited Blown air flow or cooling strip is here by means of a first, on the blowing agent attached sheet-shaped air guide element AG1 and one above the fixing roller attached second sheet-shaped air guide AG2 supported.
  • the blowing agent AT of the cooling unit CO is, based on the conveying direction X of the toner image-bearing recording medium or paper sheet P, essentially upstream of the fixing gap N and in a spaced apart from this fixing gap Area of the fixing roller FR arranged.
  • the temperature values Ts; T1; T2; T3 are on the outer peripheral surface FS of the fixing roller FR by means of an input circuit I with the control unit CU electrically connected / coupled temperature sensor ST can be detected.
  • the Temperature sensor ST is used to detect the temperature values TS; T1, T2, T3 Outer peripheral surface FS of the rotating fixing roller FR, based on the Conveying direction X of the recording medium P carrying the toner image, downstream arranged between the blowing agent AT and the fixing gap N and stands with the Outer peripheral surface FS of the fixing roller FR in contact.
  • Temperature sensor / s ST radially spaced from the outer peripheral surface and become the Temperature values of the fuser roller recorded without contact.
  • the blowing agent AT is in the form of a cylindrical tube with im formed essentially circular cross-sectional profile, the first axial end sealed airtight and the second of which is connected to the compressed air source BL.
  • the Blowing agent AT has at least one along its axial extent in its tube wall extending slot-shaped air nozzle D for generating the concentrated and directed air flow AJ, by means of the on the outer peripheral surface FS Fixing roller FR a extending over the entire axial length of the fixing roller Cooling strip CA can be generated with a predetermined width.
  • the air nozzle D of the blowing agent AT points along the axial extent of the fixing roller FR predetermined different diameters, shapes or different distances each other (not shown) such that uneven heating of the fuser roller along its axial extent by a predetermined, equalizing cooling is avoidable, for example, if the sheet width is less than the axial extension of the Fuser roller is.
  • a width resulting from the blowing air flow of the blowing agent AT of the cooling unit CO the cooling strip CA is substantially equal to or less than a quarter of the Outer circumference FS of the fixing roller FR.
  • the compressed air source of the cooling unit is CO as one motor-driven fan blower BL formed; is the blowing agent AT over one Air duct AP connected to the fan blower; and is the blowing air flow AJ of the Blowing agent through, by means of the control unit CU and one at its output circuit O connected motor speed control unit RC, speed change on Fan blower BL controllable and adjustable.
  • the cooling unit CO points to its Blowing agent AT a blowing air flow AJ with an air pressure of less than 1.5 bar and an air performance Pc of less than 16 liters / sec.
  • the cooling unit CO has three in a row in the direction of rotation of the fixing roller FR arranged blowing agent AT1, AT2, AT3, which are parallel to one another and concentric to Fuser roller are arranged; and are the three blowing agents AT1, AT2AT3 in Direction of rotation at such an angular distance from each other that the through whose blow air flows AJ1, AJ2, AJ3 on the outer peripheral surface FS of the fixing roller FR generated cooling strips CA1, CA2, CA3 are spaced apart or touching.
  • the blowing agents AT1; AT2; AT3 have several along their axial wall in their tube wall Expansion air nozzles D1; D2; D3 for generating concentrated and directed blow air flows (not shown), by means of those on the Outer peripheral surface FS of the fixing roller FR over the entire axial length of the Fixing roller extending cooling strips CA1; CA2; CA3 with a predetermined width can be generated.
  • One by the three individual cooling strips CA1; CA2; CA3 Blowing agent AT1; AT2; AT3 resulting width of a total cooling strip is substantially equal to or less than a quarter of the outer circumference FS of the fixing roller FR.
  • the compressed air source of the cooling unit CO is as one in this alternative embodiment Commercially available air compressor AS, not shown.
  • blowing agents AT1; AT2; AT3 are controllable air valves PV with the compressed air compressor AS connected and individually or by means of the control unit CU together for the control and regulation of the blown air flow AJ1; AJ2; AJ3 the Blowing agent AT1; AT2; AT3 controllable.
  • the first predetermined Temperature value T1 of the fixing roller FR by means of the constant maximum heating power Ph operated heating means H1 (step 51) and from reaching the predetermined first Temperature value T1, this temperature value T 1 by means of the small to medium (0 to 50%) air power Pc operated blowing air flow AJ of the cooling unit CO generated and regulated (step 53).
  • the generation and regulation of the predetermined temperature values T1; T2; T3 am The outer peripheral surface FS of the fixing roller FR is essentially by means of the controllable and adjustable blowing air flow AJ; AJ1-3 of the cooling unit CO carried out; the control and regulation of the blown air flow AJ; AJ1-3 also depending on the determined core temperature Tc of the fixing roller FR.
  • the application / starting of the pressure roller PR takes place here together with an oil / cleaning roller at a time t3 (FIG. 5), which depends on the determined time period / delay time ts for switching over to the operating state
  • F "Fixing" is at which the core temperature Tc of the fixing roller FR is approximately 90% and a front end of a first sheet-shaped toner image bearing Recording material P is fed into the fixing gap N; being starting the Through the sheet-shaped toner image bearing recording materials P.
  • the fixing gap N is dependent on the determined time period / delay time ts or is determined.
  • the core temperature Tc of the fixing roller FR is during the operating states A and F, "Requesting a fixing job” and “fixing”, by the operating time t and Heating power Ph of the heating medium H1, by specific values of the fixing roller, such as Thermal capacity and thermal conductivity, as well as by the core temperature Tc 1 (Fig. 5) Fixing roller FR essentially determined before requesting a fixing job A and determined.
  • the two gradients (controlled variables according to steps 52 and 57 (FIG. 4a) are) in Dependence on the determined core temperatures Tc (FIG. 5) of the fixing roller FR formed so that the regulation of the blown air flow AJ; AJ1-3 depending on Temperature deviations on the outer peripheral surface FS of the fixing roller FR below Inclusion of the determined core temperature Tc is made possible.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
EP01107860A 2000-05-18 2001-04-10 Méthode et dispositif pour générer et réguler des valeurs de température sur un rouleau de fixage d'une unité de fixage d'une image de toner Withdrawn EP1156395A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10024134A DE10024134A1 (de) 2000-05-18 2000-05-18 Vorrichtung zum An- und Abstellen einer Anrückwalze einer drucktechnischen Maschine
DE10024134 2000-05-18

Publications (2)

Publication Number Publication Date
EP1156395A2 true EP1156395A2 (fr) 2001-11-21
EP1156395A3 EP1156395A3 (fr) 2005-01-12

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Application Number Title Priority Date Filing Date
EP01107860A Withdrawn EP1156395A3 (fr) 2000-05-18 2001-04-10 Méthode et dispositif pour générer et réguler des valeurs de température sur un rouleau de fixage d'une unité de fixage d'une image de toner

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US (1) US6532348B2 (fr)
EP (1) EP1156395A3 (fr)
JP (1) JP2002031984A (fr)
DE (1) DE10024134A1 (fr)

Families Citing this family (14)

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Publication number Priority date Publication date Assignee Title
JP2002304088A (ja) * 2001-04-09 2002-10-18 Ricoh Co Ltd 画像形成装置
US7054572B2 (en) * 2003-03-31 2006-05-30 Eastman Kodak Company Method and apparatus for selective fuser rolling cooling
JP4701050B2 (ja) * 2005-09-13 2011-06-15 キヤノン株式会社 画像形成装置
JP4939018B2 (ja) * 2005-09-13 2012-05-23 キヤノン株式会社 画像形成装置
JP4714902B2 (ja) * 2006-02-23 2011-07-06 コニカミノルタビジネステクノロジーズ株式会社 画像形成装置
JP4714903B2 (ja) * 2006-03-09 2011-07-06 コニカミノルタビジネステクノロジーズ株式会社 画像形成装置
JP4821541B2 (ja) * 2006-09-28 2011-11-24 コニカミノルタビジネステクノロジーズ株式会社 画像形成装置
US7764892B2 (en) * 2007-11-14 2010-07-27 Xerox Corporation Uniform gloss control apparatus and method
JP5344615B2 (ja) * 2009-10-14 2013-11-20 キヤノン株式会社 画像形成装置、その制御方法及びプログラム
JP5359781B2 (ja) * 2009-10-27 2013-12-04 コニカミノルタ株式会社 定着装置及び画像形成装置
US8457513B2 (en) * 2010-02-09 2013-06-04 Eastman Kodak Company Selective cooling of a fuser
US8265505B2 (en) * 2010-02-09 2012-09-11 Eastman Kodak Company Selective cooling of a fuser heater roller
US10114307B2 (en) 2012-09-27 2018-10-30 Electronics For Imaging, Inc. Method and apparatus for variable gloss reduction
JP6080624B2 (ja) * 2013-03-12 2017-02-15 キヤノン株式会社 画像加熱装置および画像形成装置

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Also Published As

Publication number Publication date
US6532348B2 (en) 2003-03-11
DE10024134A1 (de) 2001-11-22
EP1156395A3 (fr) 2005-01-12
JP2002031984A (ja) 2002-01-31
US20020076229A1 (en) 2002-06-20

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