CN102402163B - Fixation unit and image processing system - Google Patents
Fixation unit and image processing system Download PDFInfo
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- CN102402163B CN102402163B CN201110078895.7A CN201110078895A CN102402163B CN 102402163 B CN102402163 B CN 102402163B CN 201110078895 A CN201110078895 A CN 201110078895A CN 102402163 B CN102402163 B CN 102402163B
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- fixing member
- fixation
- record medium
- pressure
- image
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- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
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- SCKXCAADGDQQCS-UHFFFAOYSA-N performic acid Chemical compound OOC=O SCKXCAADGDQQCS-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920001721 Polyimide Polymers 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N Tetrafluoroethylene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
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Abstract
The invention provides fixation unit and image processing system, described fixation unit includes: fixing member；Pressure-producing part, it rotates while extruding described fixing member；Fixation part, it is the contact portion between described fixing member and described pressure-producing part and carries out fixing on the recording medium；And samming parts, its along described pressure-producing part direction of rotation the downstream of described fixation part and on the region longer than the axial length of described record medium against described pressure-producing part, the direction of transfer being axially perpendicular to described record medium of described record medium.
Description
Technical field
The present invention relates to fixation unit and image processing system.
Background technology
Existed JP-A-2010-2691, JP-A-2005-128200 and
The known fixation unit disclosed in JP-A-2005-77880.Such as, JP-A-2010-2691 is
Through disclosing such a technology: i.e. so that temperature equalizing roller is formed with backer roll and contacts, and
Temperature based on temperature equalizing roller controls fixing operation.
JP-A-2005-128200 has disclosed such a technology: i.e., to having heating
The temperature of the heating roller in source measures, and result based on the temperature measured controls
Heating source.
JP-A-2005-77880 has disclosed a kind of fixation unit, described fixation unit bag
Include: endless belt；Heating unit, it heats described endless belt；Presser unit, it is to annular
The periphery of band applies pressure to form fixing occlusion portion；And all hot cell, itself and annular
Band forms contact so that the equalizing temperature of width of endless belt.
Summary of the invention
The present invention provides the fixation unit and image shape that the temperature of pressure-producing part can be suppressed to decline
Become device.
First structure of the present invention is a kind of fixation unit, and described fixation unit includes: fixing
Parts；Heating unit, it heats described fixing member；Pressure-producing part, it is described in extruding
Rotate while fixing member；Fixation part, it is described fixing member and described pressurization part
Contact portion between part and carry out fixing on the recording medium；And samming parts, its
Along the direction of rotation of described pressure-producing part in the downstream of described fixation part and than institute
Against described pressure-producing part on the region of the axial length length stating record medium, described record is situated between
The direction of transfer being axially perpendicular to described record medium of matter.Described heating unit is designed to
Different temperature can be set according to the axial location of described fixing member.Described fixing section
The district contacted with described record medium when described record medium is through described fixation part of part
Surface temperature in the axially external part in territory be set than described fixing member in institute
Table in the region contacted with described record medium when stating record medium through described fixation part
Surface temperature is high.
Second structure of the present invention is a kind of fixation unit, and described fixation unit includes: fixing
Parts；Heating unit, it heats described fixing member；Pressure-producing part, it is described in extruding
Rotate while fixing member；Fixation part, it is described fixing member and described pressurization part
Contact portion between part and carry out fixing on the recording medium；And samming parts, its
Direction of rotation along described pressure-producing part adds against described in the downstream of described fixation part
Splenium part, and by heat from the non-contact area of described pressure-producing part Yu described record medium
Axially it is sent to the contact area of described pressure-producing part and described record medium, so that described
Surface temperature homogenization between non-contact area and described contact area.Described heating unit
It designed to be able to the axial location according to described fixing member and set different temperature.Institute
State fixing member described record medium through described fixation part time with described record medium
Surface temperature in the axially external part in the region of contact is set than described fixing section
The district contacted with described record medium when described record medium is through described fixation part of part
Surface temperature in territory is high.
3rd structure of the present invention is according to the fixation unit described in the first or second structure, also
Including: spray feed unit, it is to described pressure-producing part spray feed air.
4th structure of the present invention is according to described in any configuration in the first to the 3rd structure
Fixation unit, described fixing member includes: support member, and it is relative with described pressure-producing part
Ground rotates；And endless belt-shaped main body, it stretches between described support member.
5th structure of the present invention is a kind of image processing system, including: image forming portion,
It forms image on the recording medium；And according to any configuration in first to fourth structure
Described fixation unit, will be formed in the institute on described record medium by described fixation unit
State image to be fixed on described record medium.
The first structure according to the present invention, compared with the situation that this structure is not provided, Ke Yiyou
The temperature of effect ground suppression pressure-producing part declines.
The second structure according to the present invention, compared with the situation that this structure is not provided, Ke Yiyou
The temperature of effect ground suppression pressure-producing part declines.
The 3rd structure according to the present invention, when from thin record Medium Replacement, record medium is become thickness
During record medium, the expansion of the water vapour owing to containing in thin record medium can be suppressed to cause
The granulating of image.
The 4th structure according to the present invention, when becoming to have little axial dimension by record Medium Replacement
Record medium time, the uneven glossiness of image can be suppressed.
The 5th structure according to the present invention, it is provided that a kind of temperature that can suppress pressure-producing part
The image processing system that degree declines.
Accompanying drawing explanation
Based on drawings below, explain the exemplary embodiment of the present invention, wherein:
Fig. 1 is the entirety illustrating image processing system according to an exemplary embodiment of the present invention
Schematic diagram；
Fig. 2 is the overall signal illustrating fixation unit according to an exemplary embodiment of the present invention
Figure；
Fig. 3 is the major part illustrating fixation unit according to an exemplary embodiment of the present invention
Sectional view；
Fig. 4 is the master illustrating the fixation unit of modified example according to an exemplary embodiment of the present invention
Want the sectional view of part；And
Fig. 5 is fixation unit whole illustrating modified example according to an exemplary embodiment of the present invention
The schematic diagram of body.
Detailed description of the invention
(1) essential structure of image processing system and operation
As it is shown in figure 1, this image processing system 1 is based on by reading the coloured silk that document is obtained
Color image information or the cromogram sent from the view data input equipment of such as personal computer
As information performs image procossing, and on sheet material P, form colour by xerography
Image.Sheet material P is the example of record medium.The example of record medium includes such as OHP sheet
The resin sheet of material and paper.
Image processing system 1 has the image formation unit of the example as image forming portion
10Y, 10M, 10C and 10K, described image forming portion is used for forming shades of colour, i.e.
Yellow (Y), magenta (M), aeruginous (cyan) (C) and black (K)
Toner image.Image formation unit 10Y, 10M, 10C and 10K are relative to by supporting
The direct of travel of the annular intermediate transfer belt 30 of roller 34 and multiple roller 32 stretching is to be named
Order arranges continuously.It addition, intermediate transfer belt 30 is through as constituting the formation of each image
The photosensitive drums 12 of the image holding body of unit 10Y, 10M, 10C and 10K and and photosensitive drums
Between 12 primary transfer rollers 16 positioned opposite, and backing roll 34 and as with backing roll
Between the secondary transfer roller 36 that the image transfer section of 34 contacts is divided.
Additionally, arrange charger 22, exposing unit 14, development around each photosensitive drums 12
Unit 15 and photoreceptor cleaner 20.The surface of photosensitive drums 12 is carried out uniformly by charger 22
Ground charging.Exposing unit 14 is used as to utilize light to irradiate the surface of photosensitive drums 12 with in photosensitive drums
The exposing unit of electrostatic latent image is formed on the surface of 12.It is quiet that developing cell 15 uses toner to make
Electricity sub-image visualizes to form toner image.Photoreceptor cleaner 20 removes photosensitive drums 12
Surface on transfer residual toner etc..
Paper supply unit 41 is arranged in the bottom of image processing system 1.For picking up stacking
The pick-up roller 42 going up most one in sheet material P is arranged in the upper of the left part of paper supply unit 41
Side.In the left side of pick-up roller 42, guide etc. makes transmission path radially bend.Transmit in pairs
Roller 43 is arranged in the downstream being bent upwards part transmitting path.Guides etc. make transmission path
Footpath bends the most to the right, and transfer roller 43 is arranged in the right bending section transmitting path in pairs
The downstream divided.Paired alignment rolls 44 is suspended for making sheet material P and corrects sheet material P's
Heeling condition, and it is arranged in the downstream of paired transfer roller 43.Above-mentioned paired backing roll
34 and secondary transfer roller 36 be arranged in the downstream of paired alignment rolls 44.In paired supporting
Being disposed with fixation unit 60 on the right side of roller 34 and secondary transfer roller 36, conveyer belt 45 is set to
Between paired backing roll 34 and secondary transfer roller 36 and fixation unit 60.Output in pairs
Roller 46 and export orientation part 47 are arranged in the downstream of fixation unit 60.Below will in detail
The structure of fixation unit 60 is described.
It follows that will illustrate typically by the image shape being used for being formed yellow tone agent image
Become the image forming operation performed by unit 10Y.
Surface by the charger 22 photosensitive drums 12 to being arranged in image formation unit 10Y
Charge equably.Then, exposing unit 14 based on view data by beam emissions to sense
To perform the exposure corresponding with yellow image on light drum 12.Therefore, at the table of photosensitive drums 12
The electrostatic latent image corresponding with yellow image is formed on face.
Use the toner being maintained on the developer roll 18 of developing cell 15 in photosensitive drums 12
The electrostatic latent image corresponding with yellow image carries out being developed to yellow tone agent image.Pass through
The pressure of primary transfer roller 16 and the electrostatic of transfer bias being applied on primary transfer roller 16
Yellow tone agent image is transferred on intermediate transfer belt 30 by gravitation.
In this primary transfer, yellow tone agent image is not fully transferred to centre
In transfer belt 30, but it is partially remaining in photosensitive drums 12.It addition, in toner
External additives etc. also adhere on the surface of photosensitive drums 12.Photosensitive drums after primary transfer
12 through the position relative with photoreceptor cleaner 20, to remove the transfer in photosensitive drums 12
Residual toner etc..Hereafter, recharged to the surface of photosensitive drums 12 by charger 22
Circulation is formed for next image.
It addition, in image processing system 1, each coloured image formed unit 10Y,
10M, 10C perform the figure identical with above-mentioned image formation process with in 10K by following timing
As formation process: take into account in this timing image formation unit 10Y, 10M, 10C and
Adjacent image in 10K forms the relative position gap between unit.Therefore, shades of colour Y,
The toner image of M, C and K is sequentially superimposed on the intermediary transfer belt 30, in order in
Between form polychrome toner image in transfer belt 30.
Then, by being applied with the electrostatic attraction of the secondary transfer roller 36 of transfer bias by polychrome
Toner image is together transferred to sheet material P from intermediate transfer belt 30, and described sheet material P is such as
Transmit from paper supply unit 41 via pick-up roller 42 and paired transfer roller 43, and by registrating
The transmission timing that roller 44 determines arrives secondary transfer roller 36.Reclaimed not by band cleaner 33
It is transferred to sheet material P and remains toner etc. on the intermediary transfer belt 30.
Additionally, passed transferred with the sheet material P of polychrome toner image from intermediate transfer belt 30
Delivering to fixation unit 60, described fixation unit 60 is by heating and pressurizes polychrome toner figure
As being fixed on sheet material P.Therefore, sheet material P forms full-colour image.Hereafter, pass through
Export orientation part 47 and paired outlet roller 46 export sheet material P.
(2) structure of fixation unit
It follows that by the structure referring to figs. 2 and 3 explanation fixation unit 60.At these figures
In, reference 61 is denoted as the fixing roller of support member example.Fixing roller 61 is served as reasons
The cylinder roller that aluminum etc. are formed.Halogen light 61a as heating unit example is arranged on fixing
The inside of roller 61 and extension in the whole length of fixing roller 61.Halogen light 61a is set
It is calculated as to set different temperature according to the axial location of fixing roller 61.By not shown
Drive mechanism make the fixing roller 61 counter clockwise direction along Fig. 2 rotate.
As it is shown on figure 3, the region represented by reference B is contact area as described below:
In this contact area, the sheet material of the A4 size transmitted in the way of long edge direction of transfer
P and fixing roller 61 and backer roll 70 (will be described later) are against (contact).Below
Explanation in, this contact area is referred to as " sheet material pass region B ", and any size
Sheet material P not should with fixing roller 61 and backer roll 70 against region, i.e. sheet material passes
Other region any outside the B of region is referred to as " sheet material is non-through region A ".Halogen light
61a enables to the non-temperature through region A of sheet material of fixing roller 61 higher than sheet material through district
The temperature of territory B, on the contrary or the non-temperature through region A of sheet material is passed less than sheet material
The temperature of region B.
Fixing band 62 as fixing member example is wrapped on fixing roller 61.Fixing band 62
It is wrapped among idler roller 63,64,65,66,67 and 68.Therefore, at fixing band 62
The tension force that upper applying is constant.These idler roller 63 grades are formed by aluminum etc., and each have with
Halogen light 63a and 64a of the function that Halogen light 61a is identical is separately positioned on idler roller 63 He
In 64.
Fixing band 62 is endless belt, and it is by the multilamellar including basic unit, silastic-layer and adherent layer
Structure is constituted.Basic unit is formed by polyimide resin etc..Face side (outer weekly form in basic unit
Side, face) upper strata is pressed with silastic-layer.Silastic-layer is formed adherent layer further and is somebody's turn to do
Adherent layer is formed by tetrafluoroethene perfluorovinyl ether copolymer resins (PFA) etc..
Make the backer roll 70 as pressure-producing part example and be wound with the fixing of fixing band 62
Roller 61 forms extruding contact.In backer roll 70, as it is shown on figure 3, silastic-layer 72 shape
Become on the periphery of the cylindric core 71 formed by aluminum etc., and by PFA make antiseized
Layer 73 is arranged on the periphery of silastic-layer 72.Silastic-layer by fixing roller 61 extruding
72 elastic deformations, to be formed as fixation part between fixing roller 61 and backer roll 70
Occlusion portion N.Backer roll 70 is along with the movement of fixing band 62 and clockwise along Fig. 2
Direction rotates.When sheet material P is placed between fixing band 62 and backer roll 70, pass through
Polychrome toner image is fixed on sheet material P to be formed complete by the heat of fixing band 62 and pressure
Color image.
Contact with the periphery formation of backer roll 70 as the heat pipe 80 of samming examples of components.
Heat pipe 80 is longer than the axial length of backer roll 70.Heat pipe 80 has following function: when
When backer roll 70 has different temperatures in its each several part, this heat pipe 80 can be by heat
It is delivered to low temperature part so that the temperature of these parts is close to uniform state from high-temperature part.
In heat pipe 80, aluminum etc. the cylindrical tube formed is filled with as heat transmission medium
Water 81.Heat pipe 80 is rotatably supported and by not showing on two ends that it is relative
The spring gone out is expressed on backer roll 70.By the rotation of backer roll 70, heat pipe 80 is inverse
Hour hands rotate.In addition to being filled with the heat pipe of the heat transmission medium of such as water, can be by
The pole that the metal of the thermal conductivity (0.94cal/cm DEG C of sec) being not less than copper by thermal conductivity is made
As samming parts.
Heat pipe 80 in following position against backer roll 70: i.e., from fixing roller 61 with add
The occlusion portion N between pressure roller 70 center in the direction of rotation of backer roll 70 around
The position of center of rotation anglec of rotation θ of backer roll 70.It is to say, heat pipe 80
Center O3 is positioned at the center O2's from the center O1 with backer roll 70 connecting fixing roller 61
Line segment is along the position of the direction of rotation transfer angle, θ of backer roll 70.
(3) operation of fixation unit
Secondary transfer printing has the sheet material P of polychrome toner image left side from Fig. 2 to enter
In occlusion portion N between fixing band 62 and backer roll 70.Heat by fixing band 62
With pressure, polychrome toner image is fixed on sheet material P.Therefore, sheet material P is formed
Full-colour image.Now, the Halogen light 61a etc. of fixing roller 61 fixing band 62 is heated.Separately
Outward, the conduction of heat from fixing band 62 backer roll 70 is heated.
Here it is preferred that when image is formed, the glossiness of image is low.Can pass through
The temperature reducing fixing band 62 reduces glossiness.But, when the temperature of fixing band 62 drops
Time low, probably can occur fixing bad.On the other hand, it is set when the temperature of backer roll 70
When obtaining high, the heat of backer roll 70 is delivered to the toner being secondary transferred from sheet material P, with
The part being positioned at sheet material P side enabling toner is melted fully, thus ties securely
It is combined on sheet material P.Otherwise, the portion being positioned at fixing band 62 side of the toner being secondary transferred
Dividing is affected little by the heating of backer roll 70 such that it is able to make glossiness reduce.Therefore,
The temperature of fixing band 62 is not increased by the temperature of backer roll 70 is set to height, it is possible to
The glossiness of image is reduced while guaranteeing fixing performance.
But, when carrying out image in thick sheet P continuously and being formed, sheet material P is from pressurization
Roller 70 absorbs major part heat.In view of this, heat pipe is made in the present example embodiment
80 contact with the periphery formation of backer roll 70.Result, although the sheet material of backer roll 70 passes
The heat of region B is absorbed by sheet material P, but the non-heat through region A of sheet material can be by
Heat pipe 80 is delivered to sheet material through region B so that the non-temperature through region A of sheet material and
Sheet material passes the temperature of region B close to uniform state.Therefore, even if in thick sheet P
In the case of carrying out image formation continuously, it is also possible to the sheet material of suppression backer roll 70 is through district
The temperature of territory B declines, thus reduces the glossiness of image while guaranteeing fixing performance.
Incidentally, in the present example embodiment, " thick sheet " refers to not be thinner than 82g/m2
Sheet material.
In the present example embodiment, heat pipe 80 from fixing roller 61 and backer roll 70 it
Between the position of occlusion portion N center anglec of rotation θ in the direction of rotation of backer roll 70
Put place against backer roll 70, and heat pipe 80 be arranged in occlusion portion N downstream and
Near occlusion portion N.The moment backer roll 70 after occlusion portion N has been passed at sheet material S
Surface in, sheet material through region B temperature decline, and sheet material through region B with
Sheet material is non-exists big temperature difference through the A of region.As a result, heat pipe 80 makes heat
Transmit efficiently through the A of region through region B and sheet material are non-at sheet material, so that sheet material
Temperature and the non-temperature through region A of sheet material through region B can be close to more uniform
State.Therefore, it is desirable to heat pipe 80 is arranged to be positioned as close to occlusion portion N.
Preferably, angle, θ is set to no more than 90 ° or no more than 60 °.
Here, when heat pipe 80 in being not provided with such as this exemplary embodiment, permissible
It is used as suppressing backer roll in considering the heating unit of such as Halogen light is arranged on backer roll 70
The unit that the temperature of 70 declines.But, backer roll 70 is provided with silicon on the periphery of core 71
Rubber layer 72.The thermal conductivity of silastic-layer 72 is low.Accordingly, it is difficult to increase backer roll rapidly
The surface temperature of 70, the structure simultaneously making backer roll 70 is complicated.Therefore, also it is from manufacture
From the point of view of cost, realizability is low.On the other hand, when for increasing backer roll 70
When the heating unit of surface temperature is arranged on backer roll 70 outside, manufacturing cost may be relatively
Ground increases so that realizability is low.When the temperature of fixing band 62 is set sufficiently high with suppression
When the temperature of backer roll 70 declines, the glossiness of image may be improved.
About this point, according to this exemplary embodiment, the temperature of backer roll 70 declines can be by
Suppression, and without new heating unit and temperature that fixing band 62 will not be increased.
It addition, according to this exemplary embodiment, the condition of heating fixing band 62 is according to sheet material P
Size or thickness and change.Such as, when sheet material P is A3 size, all of Halogen light
61a, 63a and 64a are opened, and Halogen light 61a, 63a when sheet material P is B5 size
It is closed with any one in 64a.Chi based on the sheet material P accommodated in paper supply unit 41
Very little carry out this control.
It addition, or not by fixing band 62 at fixing roller 61 but be directly forced into and add
In structure on pressure roller 70, to the be energized size according to sheet material P or the thickness of Halogen light 61a
And change.When the size of sheet material P in such configuration becomes small size from large scale, i.e.
Make to change to the energising of Halogen light 61a, fixing roller under conditions of for large scale sheet material P
The Temperature Distribution of 61 will keep a little meeting.As a result, due at fixing roller 61 for small-size slice
Temperature difference in the appropriate section of material P, is likely to occur uneven light in the image formed
Pool degree.
About this point, according to above-mentioned exemplary embodiment, by the fixing band 62 that thermal capacity is little
Carry out fixing.Therefore, the temperature difference between the position of fixing band 62 can promptly close to
Uniform state such that it is able to suppress the generation of uneven glossiness.
(4) modified example of exemplary embodiment
In the foregoing example embodiment, the temperature in Halogen light 61a, 63a and 64a it is set in
Degree can change according to axial location, in order to by non-for the sheet material of fixing band 62 through region A
Temperature be set higher than sheet material through the temperature of region B.Even if sheet material is non-through region A
The temperature of middle fixing band 62 raises, due to non-through region A from sheet material by heat pipe 80
It is delivered to the sheet material heat increase through region B, will not affect that the glossiness of image, and
The temperature that can effectively suppress sheet material to pass backer roll 70 in the B of region declines.
On the contrary, the non-temperature through region A of the sheet material of fixing band 62 can be set
The temperature of region B is passed less than sheet material.When being continuously formed image on thin paper P, by
In a small amount of heat absorbed from backer roll 70, the temperature of backer roll 70 may excessively raise.
In this case, due to the expansion of the water vapour from the sheet material P being fixed, figure
As being granulated.In order to solve this problem, set fixing band 62 as mentioned above
Temperature.Therefore, it is possible to prevent the excessive temperature of backer roll 70 from raising.In this exemplary enforcement
In example, " thin paper " refers to compare 82g/m2Thin sheet material.
It follows that when forming image on ground paper P, it is contemplated that by absorbed by sheet material P
Heat, the temperature of backer roll 70 is set higher than when forming image on thin paper P.As
Fruit is when for being formed on backer roll 70 when the sheet material of image becomes thin paper P from ground paper P
Temperature is kept as height, due to from water vapour swollen just carrying out fixing sheet material P on it
Swollen, image will be granulated.In order to solve this problem, as it is shown in figure 5, can arrange
As the fan 95 by the example of the spray feed unit on air spray feed to backer roll 70.Fan
The whole axial region of 95 cooling backer rolls 70.Spray feed unit is not limited to fan 95.Optional
Select ground, pipeline can be connected to the insufflation unit being arranged on outside fixation unit, and make pipe
The end in road is towards backer roll 70.
It addition, heat pipe 80 is not limited to the heat pipe in above-mentioned exemplary embodiment, but can
To carry out various modification.Such as, structure can be made as shown in Figure 4, so that in endless belt 92
While being forced on backer roll 70, this endless belt 92 can be around two rotatable heat pipes 90
It is wound around with 91.In this state, due to multiple heat pipe 90 and 91 and endless belt 92
Contact with the surface between backer roll 70, it is possible to effectively carry out in backer roll 70 from sheet material
Non-through region A to sheet material through the heat transfer of region B.
Fixation unit according to the present invention can be applicable to such as printer, photocopier, printer,
Facsimile machine and with the image processing systems such as these devices compounding machine with identical function.
Provide before the exemplary embodiment of the present invention with descriptive purpose for explaining
Explanation.It is not intended to exhaustive or limits the invention to exact form disclosed.Obviously, right
Many amendments and modification can be carried out in those skilled in the art.Select and this is described
Exemplary embodiment is to preferably explain the principle of the present invention and actual application thereof, therefore
Make the art other people can understand the present invention and various for realizing various embodiment
It is suitable for the amendment of conceived application-specific.Purpose be by claims and
Equivalents limits the scope of the present invention.
Claims (5)
1. a fixation unit, including:
Fixing member；
Heating unit, it heats described fixing member；
Pressure-producing part, it rotates while extruding described fixing member；
Fixation part, it is the contact portion between described fixing member and described pressure-producing part
And carry out fixing on the recording medium；And
Samming parts, its along the direction of rotation of described pressure-producing part at described fixation part
Downstream and on the region longer than the axial length of described record medium against described pressurization
Parts, the direction of transfer being axially perpendicular to described record medium of described record medium,
Wherein, described heating unit designed to be able to the axial position according to described fixing member
Put and set different temperature, and
Described fixing member described record medium through described fixation part time with described note
It is described that surface temperature in the axially external part in the region of recording medium contact is set ratio
Connecing with described record medium when described record medium is through described fixation part of fixing member
Surface temperature in the region touched is high.
2. a fixation unit, including:
Fixing member；
Heating unit, it heats described fixing member；
Pressure-producing part, it rotates while extruding described fixing member；
Fixation part, it is the contact portion between described fixing member and described pressure-producing part
And carry out fixing on the recording medium；And
Samming parts, its along the direction of rotation of described pressure-producing part at described fixation part
Downstream is against described pressure-producing part, and by heat from described pressure-producing part and described record
The non-contact area of medium is axially sent to connecing of described pressure-producing part and described record medium
Touch region, so that the surface temperature between described non-contact area and described contact area is uniform
Change,
Wherein, described heating unit designed to be able to the axial position according to described fixing member
Put and set different temperature, and
Described fixing member described record medium through described fixation part time with described note
It is described that surface temperature in the axially external part in the region of recording medium contact is set ratio
Connecing with described record medium when described record medium is through described fixation part of fixing member
Surface temperature in the region touched is high.
Fixation unit the most according to claim 1 and 2, also includes: spray feed unit,
It is to described pressure-producing part spray feed air.
Fixation unit the most according to claim 1 and 2, wherein, described fixing member
Including: support member, it relatively rotates with described pressure-producing part；And endless belt-shaped master
Body, it stretches between described support member.
5. an image processing system, including:
Image forming portion, it forms image on the recording medium；And
Fixation unit according to claim 1 and 2, by described fixation unit by shape
The described image on described record medium is become to be fixed on described record medium.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-208112 | 2010-09-16 | ||
| JP2010208112A JP5743052B2 (en) | 2010-09-16 | 2010-09-16 | Fixing apparatus and image forming apparatus |
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| CN102402163A CN102402163A (en) | 2012-04-04 |
| CN102402163B true CN102402163B (en) | 2016-12-14 |
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| CN1867873A (en) * | 2003-10-17 | 2006-11-22 | 松下电器产业株式会社 | Fixing device and temperature control method |
| JP2010164860A (en) * | 2009-01-16 | 2010-07-29 | Canon Inc | Image forming apparatus |
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| CN1867873A (en) * | 2003-10-17 | 2006-11-22 | 松下电器产业株式会社 | Fixing device and temperature control method |
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