CN101630130B - Paper feed apparatus - Google Patents
Paper feed apparatus Download PDFInfo
- Publication number
- CN101630130B CN101630130B CN2009101403013A CN200910140301A CN101630130B CN 101630130 B CN101630130 B CN 101630130B CN 2009101403013 A CN2009101403013 A CN 2009101403013A CN 200910140301 A CN200910140301 A CN 200910140301A CN 101630130 B CN101630130 B CN 101630130B
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- CN
- China
- Prior art keywords
- paper
- half cycle
- quarter moon
- forming roll
- superiors
- 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 - Fee Related
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- 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
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6502—Supplying of sheet copy material; Cassettes therefor
- G03G15/6511—Feeding devices for picking up or separation of copy sheets
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
In one embodiment of the invention, in a paper feed apparatus having a half-moon roller disposed above a plurality of sheets of paper stored in a stacked manner, and an auxiliary roller provided along one end of a half-circumferential face of the half-moon roller, the half-moon roller being rotated in a state in which a topmost sheet of paper has been put in contact with a height regulating member due to the sheets of paper being biased upward, so that the auxiliary roller and the half-circumferential face of the half-moon roller are successively pushed against the topmost sheet of paper, and while the sheets of paper are pushed down by the auxiliary roller or the half-circumferential face of the half-moon roller, the topmost sheet of paper is pulled out by the half-circumferential face of the half-moon roller: the one end of the half-circumferential face of the half-moon roller is separated from the auxiliary roller, and a curvature of the one end of the half-circumferential face is gradually increased closer to the auxiliary roller.
Description
This application is according to the 29 first item of Patent Law, require based on July 16th, 2008 spy in japanese publication be willing to the right of priority of 2008-185078.Thus, its full content is introduced the application.
Technical field
The present invention relates to a kind of paper feed that paper used for recording etc. is supplied with that is applicable to image processing systems such as duplicating machine, printer, facsimile unit for example.
Background technology
As this existing paper feed, on the books in japanese kokai publication sho 62-191337 communique., take in many base plates with paper to the top application of force here to piling up, make the superiors with paper and limitation in height parts state of contact under take in and respectively use paper.Then, make to be configured in each first quarter moon forming roll rotation, make the half cycle face of first quarter moon forming roll push the paper of using of the superiors, utilize the half cycle face of first quarter moon forming roll to extract the paper of using of the superiors out with the top of paper.
In addition, in japanese kokai publication hei 5-286585 communique, help roll is set in the interpolation of the half cycle face end of first quarter moon forming roll; Make the rotation of first quarter moon forming roll; Make the half cycle face of first quarter moon forming roll push the paper of using of the superiors, utilize the half cycle face of first quarter moon forming roll to extract the paper of using of the superiors out, the half cycle face of first quarter moon forming roll leave the superiors use paper the time; Make the help roll that rotates with this first quarter moon forming roll push the paper of using of the superiors, with each with under the letterweight.
In addition, existing apparatus shown in Figure 7 is arranged.In this device, near the half cycle face end 201a of first quarter moon forming roll 201, be provided with help roll 202.And; As shown in Figure 8, make first quarter moon forming roll 201 rotation, make the half cycle face of help roll 202 and first quarter moon forming roll 201 push successively the superiors with paper 204; Utilize the half cycle face of help roll 202 or first quarter moon forming roll 201 to depress each and use paper; What make the superiors leaves limitation in height parts 203 downwards with paper 204, simultaneously, utilize the half cycle face of first quarter moon forming roll 201 extract out the superiors with paper 204.
Like this, provide use that the various existing apparatus of first quarter moon forming roll are arranged.
; In the existing apparatus of Fig. 7 and Fig. 8; Owing to be formed with the angle of 90 degree at the half cycle face end 201a of first quarter moon forming roll 201, and half cycle face end 201a descends sharply, therefore; The half cycle face of help roll 202 and first quarter moon forming roll 201 push successively the superiors with paper 204 time; The half cycle face of help roll 202 and first quarter moon forming roll 201 is lacked with the time compole that contact with paper 204 of the superiors simultaneously, with help roll 202 leave the superiors with paper 204 while roughly, the angle of the half cycle face end 201a of first quarter moon forming roll 201 and 204 usefulness letterweights of the superiors connect.At this moment, the superiors with paper 204 transfixions because the angle of the half cycle face end 201a of first quarter moon forming roll 201, the superiors are pushed by the part with paper 204, the superiors become very big with paper 204 and the stiction with between paper under it.Therefore, when the half cycle face that utilizes first quarter moon forming roll 201 extract out the superiors with paper 204 time, the many supplies (multi-feeding) with paper that also are drawn out of simultaneously and so on paper under it can take place.
Summary of the invention
Therefore, the present invention accomplishes in view of the above problems, and its objective is provides a kind of half cycle face end at the first quarter moon forming roll to be provided with help roll and the paper feed with many supplies of paper can not take place.
In order to address the above problem; Paper feed of the present invention possesses to be configured in and is stacked many of accommodating with the first quarter moon forming roll of the top of paper and the help roll that is provided with along half cycle face one end of this first quarter moon forming roll, to each with principal direction above the application of force, make under the state with paper and limitation in height parts butt of the superiors; Make the rotation of first quarter moon forming roll; Make the half cycle face of help roll and first quarter moon forming roll push the paper of using of the superiors successively, utilize the half cycle face of help roll or first quarter moon forming roll to depress each and use paper, simultaneously; Utilize the half cycle face of first quarter moon forming roll to extract the paper of using of the superiors out; Half cycle face one end of above-mentioned first quarter moon forming roll is left from above-mentioned help roll, and an end of this half cycle face is the closer to this help roll, and then the curvature of an end of this half cycle face becomes big more gradually.In addition, in the paper feed of said structure, constitute, at above-mentioned help roll before the leaving of the superiors with the paper surface, an end of the big curvature of the half cycle face of above-mentioned first quarter moon forming roll and the superiors with paper surface crimping.Further, in the paper feed of said structure, the half cycle face of above-mentioned first quarter moon forming roll is made up of rubbing surface.Further; In the paper feed of said structure; Above-mentioned first quarter moon forming roll is made up of framework on the axle that is fixed on the rotation center that becomes this first quarter moon forming roll and friction rubber on the half cycle face that is superimposed upon this framework; And above-mentioned help roll is can free rotation mode being connected with an end of above-mentioned framework, and the half cycle face of above-mentioned first quarter moon forming roll is the outer surface of friction rubber, and half cycle face one end of above-mentioned first quarter moon forming roll is the part of friction rubber.
The present invention according to such structure; When help roll was left in half cycle face one end of first quarter moon forming roll, near this help roll, the curvature of this half cycle face one end became big more gradually; Therefore; Leave from help roll the superiors with before the paper, the half cycle face end of first quarter moon forming roll begins to push gradually the paper of using of the superiors, the time that contacts with paper of the half cycle face end while of help roll and first quarter moon forming roll and the superiors is elongated.Therefore, disperseed in the half cycle face end of help roll and first quarter moon forming roll to accept to each application of force to the top that applies with paper, the superiors diminish with paper and the stiction with between paper under it.In this state, utilize the half cycle face end of first quarter moon forming roll, the superiors begin to be drawn out of with paper, and promptly being extracted out with paper of these the superiors only, are difficult for taking place the many supplies with paper.
Description of drawings
Fig. 1 is the sectional view that the image processing system of the embodiment that paper feed of the present invention is arranged is used in expression.
Fig. 2 is the sectional view of the paper feed of this embodiment of expression.
Fig. 3 is the sectional view that amplifies the first quarter moon forming roll periphery in the paper feed of presentation graphs 2.
Fig. 4 is that first quarter moon forming roll in the paper feed of presentation graphs 2 is around the sectional view that counterclockwise rotates the state after about 90 °.
Fig. 5 further amplifies an end of expression first quarter moon forming roll and the sectional view of help roll periphery.
Fig. 6 be the expression the superiors with the figure of paper surface with respect to the displacement process of first quarter moon forming roll and help roll.
Fig. 7 is the sectional view that amplifies the first quarter moon forming roll periphery of the existing paper feed of expression.
Fig. 8 is that first quarter moon forming roll in the paper feed of presentation graphs 7 is around the sectional view that counterclockwise rotates the state after about 90 °.
Embodiment
Below, with reference to accompanying drawing an embodiment of the invention are elaborated.
Fig. 1 is the skeleton diagram of image processing system that an embodiment of paper feed of the present invention has been used in expression.This image processing system is obtained the view data that reads from original copy; Or obtain from the view data of outside reception; To be formed on by the black white image of this pictorial data representation with on the paper; If the structure of this image processing system is roughly divided, then this image processing system is by original copy delivery section (ADF) 101, original document reading apparatus 102, printing portion 103, constitute with paper delivery section 104 and paper feed 105.
In original copy delivery section 101; When at least one original copy is placed in the original copy placement pallet 11; Original copy is placed pallet 11 from original copy to be extracted out one by one and carries; This original copy is guided on first sheet glass 14 of original document reading apparatus 102 and make it, this original copy is discharged to discharge tray 12 from passing through.
In original document reading apparatus 102; Below first sheet glass 14, dispose the optical module that constitutes by first scanner section 15 and second scanner section 16; When original copy passes through from first sheet glass 14; Utilize the light source of first scanner section 15 to be made public in the original copy surface; Utilize the catoptron of first and second scanner sections 15,16 to guide to imaging len 17, utilize imaging len 17 that the image on original copy surface is formed images on CCD (charge coupleddevice: the electric charge lotus root is closed element) 18 from the reflected light on original copy surface.CCD18 reads the image on original copy surface repeatedly on main scanning direction, and the view data of the image on output expression original copy surface.
In addition; Be placed at original copy under the situation on second sheet glass 19 of original document reading apparatus 102 upper surfaces; First and second scanner sections 15,16 are moved on sub scanning direction, simultaneously, utilize the original copy surface on 15 pairs second sheet glass 19 of first scanner section to make public; Utilize first and second scanner sections 15,16 further to reflect and guide to imaging len 17, on CCD18, form images through the image of imaging len 17 with the original copy surface from the reflected light on original copy surface.At this moment; The length velocity relation that makes first and second scanner sections 15,16 keep regulation each other moves; Always keep the position relation of first and second scanner sections 15,16; So that original copy surperficial → length of the such catoptrical light path of first and second scanner sections 15,16 → imaging len, 17 → CCD18 is constant, makes the focus of always correctly keeping the original image on the CCD18 thus.
Exported from printing portion 103 after implementing various Flame Image Process from the view data of CCD18 output by the control circuit of microcomputer etc.
Therefore; In the original document reading apparatus 102 of this embodiment; Dual-purpose original copy be placed on second sheet glass 19 and two kinds of original copy fixed forms that optical module (first and second scanner sections 15,16) moves at the original copy mode of movement that is transferred on first sheet glass 14 and original copy.
In printing portion 103, dispose photosensitive drums 4 in its substantial middle, dispose charged assembly 5, photoscanning assembly 6, developing device 7, transfer printing assembly 8 and cleaning assemblies 9 around it.
Charged assembly 5 makes photosensitive drums 4 surperficial uniform chargeds.Photoscanning assembly 6 input image datas, in the intensity according to the view data modulated beam of light, scanning light beam on the photosensitive drums 4 of uniform charged writes electrostatic latent image.Developing device 7 utilizes developer to make the latent electrostatic image developing on the photosensitive drums 4, on photosensitive drums 4, forms the developer picture.Transfer printing assembly 8 will use folder between itself and photosensitive drums 4 and carry and use paper, with the developer on the photosensitive drums 4 as transfer printing on paper.The developer that cleaning assemblies 9 will remain on the photosensitive drums 4 is removed, and makes it possible on photosensitive drums 4, form new developer picture.
Dispose fixing device 20 on the top of printing portion 103.Fixing device 20 receive transfer printings have image with paper and also will use folder between fixing roller and backer roll, make transfer printing with the developed image photographic fixing on the paper.
This is carried to the top through conveying roller with paper, and is discharged to discharge tray 22 from exit roller 21.
In addition; Form under the situation of image on two sides, carried to counter-rotating in the other direction by exit roller 21, further be transported to counter-rotating transport path 23 with paper with paper; After its surface and back side counter-rotating, carry to printing portion 103 once more, developer looks like to be transferred at its back side and by photographic fixing.Then, be discharged to discharge tray 22 with paper from exit roller 21.
Then, with reference to Fig. 2, the structure of the paper feed 105 of this embodiment is elaborated.In this paper feed 105, paper feeding cassette 24 is supported in the front side of image processing system main body with the mode that can slide, and side in front of paper feeding cassette 24 is drawn to is packed into to take on the inboard base plate 31 of paper feeding cassette 24 and used the paper group.In Fig. 2; Be provided with the rear end limiting part 32 that can be supported movably to the left and right in the bottom of paper feeding cassette 24; On the base plate 31 with the front end of paper group and the internal face 24a butt of paper feeding cassette 24; Move rear end limiting part 32 until the rear end of running on the base plate 31, being sandwiched between internal face 24a and the rear end limiting part 32 and being positioned on the base plate 31 with the paper group with the paper group.In addition, be clipped between a pair of guiding parts (not shown) that can move freely with the both sides of paper group and be positioned, this a pair of guiding parts is arranged on the bottom of paper feeding cassette 24.
In addition, base plate 31 is by axle 31a axle supporting, through not shown spring around axle 31a along counterclockwise by the application of force, on the base plate 31 with the paper group be picked up the superiors on base plate 31 with paper 25 and limitation in height parts 33 butts.
First quarter moon forming roll 34 is configured in the front top and the supporting of quilt axle of base plate 31, around axle 35, is driven in rotation along counter clockwise direction.End at the half cycle face of first quarter moon forming roll 34 is provided with help roll 36.
When first quarter moon forming roll 34 is driven in rotation along counter clockwise direction; At first; The superiors on help roll 36 and the base plate 31 with paper 25 crimping; Help roll 36 rolls on paper 25 in the superiors, the acting force of antagonistic spring and press downwards and use the paper group on the press 31 simultaneously, and the superiors leave limitation in height parts 33 downwards with paper 25.Then, the half cycle face of first quarter moon forming roll 34 and the superiors with paper 25 crimping, the half cycle face that utilizes first quarter moon forming roll 34 is extracted out with paper 25 the superiors.
Later on same, first quarter moon forming roll 34 around every rotation counterclockwise once, the superiors are just pushed open from limitation in height parts 33 by help roll 36 with paper 25, the half cycle face that utilizes first quarter moon forming roll 34 with the superiors with paper 25 extractions.
Fig. 3 is the sectional view that amplifies expression first quarter moon forming roll 34 peripheries.In addition, Fig. 4 is the sectional view of the state of expression first quarter moon forming roll 34 after counterclockwise rotating about 90 degree.In addition, Fig. 5 further amplifies an end of expression first quarter moon forming roll 34 and the sectional view of help roll 36 peripheries.
Like Fig. 3～shown in Figure 5; First quarter moon forming roll 34 is made up of framework 41 and friction rubber 42, and framework 41 is fixed on the axle 35, in addition; Friction rubber 42 is superimposed upon on the half cycle face of framework 41, and the engaging recessed part 41a separately that the two ends 42a of friction rubber 42 hangs over framework 41 both sides goes up and is fixed.The outer surface of friction rubber 42 becomes the half cycle face 34a of first quarter moon forming roll 34, and in addition, the part of friction rubber 42 becomes the end 34b of half cycle face 34a.
At an end 41b of framework 41, linking through not shown connecting structure has the help roll 36 that can rotate freely, help roll 36 to leave an end 34b of first quarter moon forming roll 34 and disposes.
In Fig. 5, the half cycle face 34a of first quarter moon forming roll 34 is except that the end 34b of this half cycle face 34a, and becoming with axle 35 (like Fig. 3 and shown in Figure 4) is the circular arc at center.In addition, the most peripheral position 36p of help roll 36 be positioned at axle 35 be the swing-around trajectory S of half cycle face 34a of the first quarter moon forming roll 34 of center rotation go up or swing-around trajectory S near.
If make the end 34b (part of friction rubber 42) of half cycle face 34a be the right portions of position 34p; Then to be positioned at the left side of position 34p and to become with axle 35 be the circular arc at center to half cycle face 34a; In addition; The end 34b of half cycle face 34a is positioned at the right side of position 34p, and big more the closer to help roll 36 its curvature R, forms with the mode that is involved in to the inside.
When such first quarter moon forming roll 34 is driven in rotation along counter clockwise direction with help roll 36; As stated; Help roll 36 and the superiors with the surperficial 25a crimping of paper; Help roll 36 the superiors with paper surface 25a on roll, simultaneously, the acting force of antagonistic spring and press downwards and use the paper group on the press 31.
At this moment and since the superiors with paper by to the top application of force, and always with first quarter moon forming roll 34 or help roll 36 crimping, therefore as shown in Figure 6, first quarter moon forming roll 34 and help roll 36 being subjected to displacement with respect to the superiors with paper 25a.In Fig. 6; Solid line is represented the state with paper 25a crimping of help roll only 36 and the superiors; Dotted line is represented the state with the surperficial 25a crimping of paper of an end 34b and help roll 36 and the superiors of the half cycle face 34a of first quarter moon forming roll 34; In addition, only the half cycle face 34a of first quarter moon forming roll 34 and the state with paper 25a crimping of the superiors are represented in double dot dash line.
Obviously can know from this Fig. 6, help roll 36 leave the superiors with paper surface 25a before, the end 34b of the big curvature R of half cycle face 34a and the superiors with the surperficial 25a crimping of paper.
Then; First quarter moon forming roll 34 is further rotated; The half cycle face 34a that is positioned at position 34p left side and the superiors with the surperficial 25a crimping of paper; Until help roll 36 till the leaving of the superiors with paper surface 25a during, the end 34b of the big curvature R of half cycle face 34a continue with the superiors with the surperficial 25a crimping of paper.
Therefore, help roll 36 leave the superiors with the specified time limit before the 25a of paper surface, the end 34b that the curvature R of half cycle face 34a is big continue with the superiors with the surperficial 25a crimping of paper.
The big curvature R of this half cycle face 34a one end 34b and the superiors continue with paper surface crimping during; Help roll 36 also with the superiors with the crimping of paper surface; Therefore; Half cycle face 34a and help roll 36 become big with respect to the crimping area with paper surface of the superiors, and the application of force with the spring of paper group of electing on the base plate 31 is disperseed, and the end 34b of half cycle face 34a diminishes with the surperficial crimp force of paper to the superiors.Therefore, the superiors diminish with paper and the stiction with between paper under it, an end 34b that can easily utilize half cycle face 34a with the superiors with paper taking out out under it with paper, can begin the conveying with paper of the superiors apace.And, after carrying beginning, only the superiors with paper and it under with paper between the littler friction force of generation, therefore, can be reliably continuously the half cycle face 34a extraction the superiors through first quarter moon forming roll 34 use paper.As a result, only the many supplies with paper can not take place in being drawn out of with paper of the superiors.
More than, with reference to accompanying drawing preferred implementation of the present invention is illustrated, but the present invention is not limited to above-mentioned example certainly.If the practitioner of the industry clearly can expect various variation and revise example that these also belong to technical scope of the present invention certainly in the scope that claim is put down in writing.
For example, also can suitably change the big degree of curvature R change of an end 34b of first quarter moon forming roll 34.In addition, not only can apply the present invention to pile up the paper supply tray of taking in printing, also can apply the present invention to pile up and take in the original copy pallet of original copy with paper.
And, only otherwise break away from purport of the present invention or principal character, also can be with other variety of way embodiment of the present invention.Therefore, above-mentioned embodiment is an illustration in all respects, can not carry out limited explanation.Scope of the present invention is represented that by the scope of claim instructions this paper has no constraint to it.Further, belong to the distortion and the change of the scope that the scope with claim is equal to, all within the scope of the invention.
Claims (4)
1. paper feed; It possesses to be configured in and is stacked many of accommodating with the first quarter moon forming roll of the top of paper and the help roll that is provided with along half cycle face one end of this first quarter moon forming roll, to each with principal direction above the application of force, make under the state with paper and limitation in height parts butt of the superiors; Make the rotation of first quarter moon forming roll; Make the half cycle face of help roll and first quarter moon forming roll push the paper of using of the superiors successively, utilize the half cycle face of help roll or first quarter moon forming roll to depress each and use paper, simultaneously; Utilize the half cycle face of first quarter moon forming roll to extract the paper of using of the superiors out, this paper feed is characterised in that:
Half cycle face one end and the said help roll of said first quarter moon forming roll separate, and the curvature of this half cycle face one end becomes big more gradually the closer to this help roll,
The most peripheral position of said help roll is positioned at the axle be on the swing-around trajectory of half cycle face of said first quarter moon forming roll of center rotation or this swing-around trajectory near,
Said help roll leave the superiors with the specified time limit before the paper surface, the end that the curvature of said half cycle face is big continue with the said the superiors with the surperficial crimping of paper.
2. paper feed as claimed in claim 1 is characterized in that:
Constitute, at said help roll before the leaving of the superiors with the paper surface, an end of the big curvature of the half cycle face of said first quarter moon forming roll and the superiors with paper surface crimping.
3. paper feed as claimed in claim 1 is characterized in that:
The half cycle face of said first quarter moon forming roll is made up of rubbing surface.
4. paper feed as claimed in claim 1 is characterized in that:
Said first quarter moon forming roll is made up of framework on the axle that is fixed on the rotation center that becomes this first quarter moon forming roll and friction rubber on the half cycle face that is superimposed upon this framework, and said help roll to be can free rotation mode being connected with an end of said framework,
The half cycle face of said first quarter moon forming roll is the outer surface of friction rubber, and half cycle face one end of said first quarter moon forming roll is the part of friction rubber.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-185078 | 2008-07-16 | ||
| JP2008185078A JP2010023956A (en) | 2008-07-16 | 2008-07-16 | Paper feed apparatus |
| JP2008185078 | 2008-07-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101630130A CN101630130A (en) | 2010-01-20 |
| CN101630130B true CN101630130B (en) | 2012-06-27 |
Family
ID=41529601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101403013A Expired - Fee Related CN101630130B (en) | 2008-07-16 | 2009-07-15 | Paper feed apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20100013144A1 (en) |
| JP (1) | JP2010023956A (en) |
| CN (1) | CN101630130B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5818574B2 (en) * | 2011-08-22 | 2015-11-18 | キヤノン株式会社 | Sheet feeding apparatus and image forming apparatus |
| US9114942B1 (en) * | 2014-06-27 | 2015-08-25 | Digital Check Corporation | Automatic document alignment |
| US9302866B1 (en) * | 2015-02-24 | 2016-04-05 | Lexmark International, Inc. | Pick mechanism pick roll tire having multiple tread widths |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5954328A (en) * | 1996-07-09 | 1999-09-21 | Mita Industrial Co., Ltd. | Paper feed mechanism |
| JP2005194093A (en) * | 2004-01-09 | 2005-07-21 | Sharp Corp | Paper feeding device and image forming device |
| DE202006002248U1 (en) * | 2006-02-10 | 2006-08-03 | Bdt Ag | Feed roller, roller parts group and paper handling system; roller has body with curved and chordal parts forming semi-cylindrical shaped positioning part on which is distancing roller extending along roller body |
| CN1923647A (en) * | 2005-08-31 | 2007-03-07 | 三星电子株式会社 | Printing media supply device for image forming apparatus |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE790506A (en) * | 1971-10-30 | 1973-04-25 | Agfa Gevaert Nv | SEPARATOR DEVICE PARTICULARLY FOR ELECTROSTATIC COPIER |
| JPS5942867B2 (en) * | 1978-08-29 | 1984-10-18 | キヤノン株式会社 | Sheet feeding device |
| JPS5554249U (en) * | 1978-10-09 | 1980-04-12 | ||
| JPS5623134A (en) * | 1979-07-31 | 1981-03-04 | Canon Inc | Sheet feeder |
| US5326184A (en) * | 1992-10-26 | 1994-07-05 | Hewlett-Packard Company | Apparatus and method for picking paper from a stack |
| JPH115641A (en) * | 1997-06-16 | 1999-01-12 | Canon Inc | Drive transmitting device, feeder and image forming device |
| US6055407A (en) * | 1998-03-10 | 2000-04-25 | Canon Kabushiki Kaisha | Sheet feeding device and image forming apparatus having the sheet feeding device |
| JP3323802B2 (en) * | 1998-03-11 | 2002-09-09 | キヤノン株式会社 | Paper feeder and image forming apparatus having the same |
| JPH11334903A (en) * | 1998-05-22 | 1999-12-07 | Canon Inc | Sheet feeding device and image forming device therewith |
| JP2001026327A (en) * | 1999-07-16 | 2001-01-30 | Ricoh Co Ltd | Paper feeder |
| JP4312697B2 (en) * | 2004-10-28 | 2009-08-12 | 株式会社リコー | Paper feeding device and image forming apparatus |
-
2008
- 2008-07-16 JP JP2008185078A patent/JP2010023956A/en active Pending
-
2009
- 2009-07-02 US US12/496,774 patent/US20100013144A1/en not_active Abandoned
- 2009-07-15 CN CN2009101403013A patent/CN101630130B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5954328A (en) * | 1996-07-09 | 1999-09-21 | Mita Industrial Co., Ltd. | Paper feed mechanism |
| JP2005194093A (en) * | 2004-01-09 | 2005-07-21 | Sharp Corp | Paper feeding device and image forming device |
| CN1923647A (en) * | 2005-08-31 | 2007-03-07 | 三星电子株式会社 | Printing media supply device for image forming apparatus |
| DE202006002248U1 (en) * | 2006-02-10 | 2006-08-03 | Bdt Ag | Feed roller, roller parts group and paper handling system; roller has body with curved and chordal parts forming semi-cylindrical shaped positioning part on which is distancing roller extending along roller body |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100013144A1 (en) | 2010-01-21 |
| JP2010023956A (en) | 2010-02-04 |
| CN101630130A (en) | 2010-01-20 |
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