CN102530602A - Automatic paper feeding device - Google Patents
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- CN102530602A CN102530602A CN2010105974581A CN201010597458A CN102530602A CN 102530602 A CN102530602 A CN 102530602A CN 2010105974581 A CN2010105974581 A CN 2010105974581A CN 201010597458 A CN201010597458 A CN 201010597458A CN 102530602 A CN102530602 A CN 102530602A
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Abstract
The invention provides an automatic paper feeding device, which comprises a paper guiding shell, a photo interrupter, a first sensing device, a second sensing device and a controller. When paper is fed through the paper guiding shell, the two ends of the paper trigger the first sensing device and the second sensing device respectively, so that the controller can calculate the inclination angle of the paper according to the turn-on time of the photo interrupter after the photo interrupter is turned on for a first time T1 or a second time T2. The device can stop feeding paper when the inclination angle of the paper is beyond a calibration range, so that the paper is protected from being damaged or the automatic paper feeding device is protected from being damaged; or the device can continue to feed paper without calibration when the inclination angle of the paper is in a calibration range and close to 0 or the inclination angle is 0, so that the overall efficiency of the automatic paper feeding device is increased.
Description
Technical field
The present invention relates to a kind of automatic paper feeder, relate in particular to a kind of automatic paper feeder with paper sheet askew testing agency.
Background technology
Multifunctional paper feeding machine and scanning device all are important business machines indispensable in the office, for many continuous scannings improving scanning speed, and the multifunctional paper feeding machine of configuration automatic paper feeder and the appearance of scanning device are arranged.
Figure 1A is a kind of known automatic paper feeder, is disclosed by Japanese JPA2008201513 patent application case.The automatic paper feeder 1 of Figure 1A comprises pickup roller group 11, sheet detecting apparatus 12 and paper-feed group 13; Wherein sheet detecting apparatus 12 comprises the first sensing arm 12a, the second sensing arm 12b, cross bar 12c and sense switch 12d, and sense switch 12d links through a connecting piece 12e and cross bar 12c.
Please refer to Figure 1B simultaneously, it triggers the scheme drawing of the second sensing arm 12b for crooked paper.When carrying out scanning operation, pickup roller group 11 is presented paper to be scanned 14 through sheet detecting apparatus 12, then paper-feed group 13 clamping paper 14 and with paper 14 feed-in automatic paper feeders 1 inside.If paper 14 under crooked situation by feed-in automatic paper feeder 1 inside; Then after the front end 14a of paper 14 passes through pickup roller group 11; The first end 14b of paper 14 through the second sensing arm 12b, makes the second sensing arm 12b press the second end 12cb of cross bar 12c earlier.This moment, sense switch 12d was not activated as yet, and paper-feed group 13 is not driven yet, 11 lasting paper feedings 14 of pickup roller group.
Please refer to Fig. 1 C, it triggers the scheme drawing of the first sensing arm 12a and the second sensing arm 12b for crooked paper.When the second end 14c of paper 14 and then through behind the first sensing arm 12a, the first sensing arm 12a presses the first end 12ca of cross bar 12c, makes cross bar 12c compress connecting strap 12e and triggers sense switch 12d.After sense switch 12d was activated, paper-feed group 13 was not temporarily driven, so that automatic paper feeder 1 is moving the paper 14 feed-in automatic paper feeders 1 inner skew corrected of carrying out before.Pickup roller 11 continues paper feedings 14 at this moment; In the process that paper 14 is advanced; The first end 14b of paper 14 contacts with paper-feed group 13 earlier and is kept out and do not move on by paper-feed group 13; So the second end 14c of paper 14 continues before paper-feed group 13 and then makes the front end 14a of paper 14 be tending towards parallel with paper-feed group 13, to reach the purpose of skew corrected.After paper 14 was advanced a fixed range, paper-feed group 13 was actuated to that promptly paper 14 is sent into automatic paper feeder 1 inside and carries out scanning operation.
Comprehensively the above can be known, this automatic paper feeder 1 can be proofreaied and correct paper sheet askew through sheet detecting apparatus 12 in paper feed, carry out smoothly in order to the follow up scan operation.
Problem below known automatic paper feeder 1 exists.As previously mentioned, whether the startup of sheet detecting apparatus 12 through sense switch 12d comes the opportunity of controlling and driving paper-feed group 13 and pickup roller group 11, to reach the purpose of proofreading and correct paper sheet askew.Yet; Aforementioned known automatic paper feeder 1 only can judge that sheet detecting apparatus 12 is all passed through at the two ends of paper 14 after sense switch 12d is activated, can not when paper feed is crooked, accurately learn the paper sheet askew angle; If paper 14 skew angles are excessive; The range difference of the first end 14b and the second end 14c and paper-feed group 13 that is paper 14 is greater than this fixed range, even then paper 14 gets into automatic paper feeder 1 inside through paper-feed group 13 again through corrective actions, still has problem generations such as the crooked or paperboard of scan image; If paper 14 skew angles are very little; Even do not have the generation of paper sheet askew phenomenon, and paper 14 is still carrying out corrective action through sheet detecting apparatus 12 backs through not driven paper-feed group 13, again by paper-feed group 13 feed-in automatic paper feeders 1 inside; Then can prolong production time, influence whole work efficiency.
Therefore the automatic paper feeder that needs a kind of improvement is to overcome the problem of known automatic paper feeder.
Summary of the invention
The object of the present invention is to provide a kind of automatic paper feeder that detects the paper skew angle.
Main purpose of the present invention is to provide a kind of automatic paper feeder, is used for paper feeding, comprising:
One leads the paper housing, inner in order to guide this paper to get into this automatic paper feeder;
One Photo Interrupter is positioned at this and leads the paper housing, comprises a transmitting terminal and a receiving end;
One first sensing device; Be positioned at this and lead the paper housing; Comprise one first contact part, one first cross bar and one first detecting part; This first contact part protrudes from this and leads one first outer end of paper housing, and this first detecting part can freely swing between this transmitting terminal and this receiving end and have one first hole;
One second sensing device; Be positioned at this and lead the paper housing; Comprise one second contact part, one second cross bar and one second detecting part; This second contact part protrudes from this and leads one second outer end of paper housing, and this second detecting part can freely swing between this transmitting terminal and this receiving end and have one second hole;
Wherein, When this paper during by feed-in; The two ends of this paper promote this first contact part and this second contact part respectively, make the rotation of this first cross bar and this second cross bar, to drive this first detecting part and this second detecting part is swung between this transmitting terminal and this receiving end; When the swing of this first detecting part and this second detecting part makes this first hole and this second hole complete when overlapping; This Photo Interrupter is switched on a very first time T1, and when the swing of this first detecting part and this second detecting part made this first hole and this second hole partly overlapping, this Photo Interrupter was switched on one second time T 2; And
One controller in order to calculate the skew angle of this paper, judges when this Photo Interrupter is switched on a very first time T1 that wherein this paper is not crooked, and when this Photo Interrupter was switched on one second time T 2, this controller calculated the skew angle of this paper.
In a preferred embodiment, wherein learn the skew angle of this paper after, if the skew angle of this paper exceeds the recoverable scope, even this automatic paper feeder of this controller stops the concurrent caution that makes mistake of paper feed; If the skew angle of this paper is in the recoverable scope; This controller judges that promptly this automatic paper feeder carries out skew corrected action; But if the skew angle of this paper is in the recoverable scope and convergence or equal 0, then this controller judges that promptly this automatic paper feeder needn't carry out this skew corrected action and continue paper feed.
In a preferred embodiment, comprise that more a paper taking module and a paper separating are arranged at this and lead on the paper housing, wherein this paper taking module is led the paper housing in order to present this paper through this, and this paper separating is positioned at this paper taking module below, in order to separate this paper.
In a preferred embodiment, wherein this first contact part and this second contact site are in the downstream part of this paper separating.
In a preferred embodiment, wherein this first detecting part and this second detecting part are parallel to each other.
In a preferred embodiment, wherein this first detecting part and this second detecting part are fanning strip, and this first hole and this second hole are positioned near the peripheral of this fanning strip and have the circular arc profile.
In a preferred embodiment; Wherein this first contact part and this first detecting part lay respectively at the two ends of this first cross bar and vertical with this first cross bar; This second contact part and this second detecting part lay respectively at the two ends of this second cross bar and vertical with this second cross bar, and this first cross bar and this second cross bar are positioned on the same horizon.
In a preferred embodiment, more comprise an electronic printing circuit board assembly (PCBA), be sent to this controller in order to this very first time T1 that this Photo Interrupter is switched on or this second time T 2 that is switched on.
In a preferred embodiment, wherein should very first time T1 greater than this second time T 2.
In a preferred embodiment, wherein this paper sheet askew angle is calculated according to following formula:
ΔT＝T1-T2，
ΔL＝V×ΔT，
θ＝tan(ΔL/S)
Wherein: the speed that V is fed for this paper, Δ L is that the miles of relative movement at two ends of this paper is poor, and S is the length summation of this first cross bar and this second cross bar, and θ is the paper sheet askew angle.
The present invention can stop paper feed when the paper sheet askew angle exceeds the recoverable scope; Automatic paper feeder is destroyed to avoid paper to come to harm perhaps; Also can be in the recoverable scope and level off to 0 in the paper sheet askew angle; When perhaps not having crooked phenomenon, do not carry out skew corrected and continue paper feed, to increase the whole efficiency of automatic paper feeder.
Description of drawings
Figure 1A is for showing a kind of block diagram of known automatic paper feeder.
Figure 1B is for showing the scheme drawing of known automatic paper feeder when crooked paper triggers the second sensing arm.
Fig. 1 C is for showing the scheme drawing of known automatic paper feeder when crooked paper triggers the first sensing arm and the second sensing arm.
Fig. 2 A is the exploded view of the automatic paper feeder of demonstration the present invention one preferred embodiment.
Fig. 2 B is the block diagram of the automatic paper feeder of demonstration the present invention one preferred embodiment.
Fig. 2 C is the exploded view of first sensing device, second sensing device and Photo Interrupter that shows separately the automatic paper feeder of the present invention's one preferred embodiment.
Fig. 3 A is for showing the scheme drawing of automatic paper feeder when paper feed is not crooked of the present invention's one preferred embodiment.
Fig. 3 B is the section-drawing of automatic paper feeder first sensing device, second sensing device and Photo Interrupter when paper feed is not crooked of demonstration the present invention one preferred embodiment.
The scheme drawing of the Photo Interrupter signal that Fig. 3 C produces when paper is not crooked for the Photo Interrupter of the automatic paper feeder that shows the present invention's one preferred embodiment.
Fig. 4 A is for showing the scheme drawing of automatic paper feeder when paper feed is crooked of the present invention's one preferred embodiment.
Fig. 4 B is the section-drawing of automatic paper feeder first sensing device, second sensing device and Photo Interrupter when paper feed is crooked of demonstration the present invention one preferred embodiment.
The scheme drawing of the Photo Interrupter signal that Fig. 4 C produces when paper sheet askew for the Photo Interrupter of the automatic paper feeder that shows the present invention's one preferred embodiment.
Fig. 5 transmits diagram of block for the signal of the automatic paper feeder of demonstration the present invention one preferred embodiment.
Description of reference numerals in the above-mentioned accompanying drawing is following:
1 automatic paper feeder 23b, second end
11 pickup roller groups 24 are led the paper housing
12 sheet detecting apparatus, 25 first sensing device
The 12a first sensing arm 25a first contact part
The 12b second sensing arm 25b first cross bar
The 12ca first end 25ca first blocking portion
The 12cb second end 25cb first hole
The 12d sense switch 25cc second blocking portion
13 paper-feed group 26a, second contact part
14 paper 26b, second cross bar
The 14b first end 26ca first blocking portion
The 14c second end 26cb second hole
2 automatic paper feeder 26cc, the second blocking portion
21 paper taking modules, 27 Photo Interrupters
22 paper separating 27a transmitting terminals
23 paper 27b receiving ends
23a first end 28 electronic printing circuit board assemblies (PCBA)
29 controllers
The T1 very first time
Second time of T2
V speed
Δ L miles of relative movement is poor
S length summation
The θ skew angle
S1 Photo Interrupter signal
S2 Photo Interrupter signal
The specific embodiment
According to a specific embodiment of the present invention a kind of automatic paper feeder is provided, can be applicable to multifunctional paper feeding machine or autoamtic paper feeding scanning device.
Fig. 2 A is the exploded view of the automatic paper feeder of demonstration the present invention one preferred embodiment.Automatic paper feeder 2 of the present invention is in order to paper feeding 23.Automatic paper feeder 2 includes paper taking module 21, paper separating 22, leads paper housing 24, first sensing device, 25, the second sensing device 26 and Photo Interrupter 27.Wherein first sensing device 25 comprises the first contact part 25a, the first cross bar 25b and the first detecting part 25c.Second sensing device 26 comprises the second contact part 26a, the second cross bar 26b and the second detecting part 26c.Photo Interrupter 27 comprises transmitting terminal 27a and receiving end 27b.
Paper separating 22 is arranged at leads paper housing 24 tops, and 21 of paper taking modules are arranged at paper separating 22 tops.First sensing device 25, second sensing device 26 and Photo Interrupter 27 all are arranged at leads paper housing 24 belows.The transmitting terminal 27a and the receiving end 27b of Photo Interrupter 27 face one another and keep a distance.Please refer to Fig. 2 B simultaneously, Fig. 2 B is the block diagram of the automatic paper feeder of demonstration the present invention one preferred embodiment.The first contact part 25a of first sensing device 25 protrudes from an end of leading outside the paper housing 24, and the second contact part 26a of second sensing device 26 then protrudes from the other end of leading outside the paper housing 24, and all is positioned at the downstream part of paper separating 22.Paper 23 is fed through after between paper taking module 21 and the paper separating 22, leads paper the housing 24 outer first contact part 25a and the second contact part 26a through protruding from, and then gets into automatic paper feeder 2 inside.
Please refer to Fig. 2 C, Fig. 2 C shows the exploded view of the present invention's first sensing device 25, second sensing device 26 and Photo Interrupter 27 separately.The first contact part 25a of first sensing device 25 is vertical with the first cross bar 25b with the first detecting part 25c, and the first detecting part 25c and can therebetween freely swing between the transmitting terminal 27a and receiving end 27b of Photo Interrupter 27.The first detecting part 25c is a fanning strip, comprises first 25ca of blocking portion and second 25cc of blocking portion that the first hole 25cb with circular arc profile is positioned at its periphery and lays respectively at the first hole 25cb two ends.Second cross bar 26b of second sensing device 26 and the first cross bar 25b of first sensing device 25 are positioned on the same horizon; The second contact part 26a is vertical with the second cross bar 26b with the second detecting part 26c; The second detecting part 26c and can therebetween freely swing also between the transmitting terminal 27a of Photo Interrupter 27 and receiving end 27b and parallel with the first detecting part 25c.The second detecting part 26c is a fanning strip, comprises first 26ca of blocking portion and second 26cc of blocking portion that the second hole 26cb with circular arc profile is positioned at its periphery and lays respectively at the second hole 26cb two ends.
The operation of following instruction diagram 2A to Fig. 2 C embodiment.When scanning operation carries out; Paper taking module 21 is presented paper to be scanned 23; And paper 23 being separated with the below paper through paper separating 22, first sensing device 25 and second sensing device 26 of paper 23 through leading paper housing 24 tops then is after the tail end of paper 23 passes through; Paper taking module 21 just continues to present next paper, till accomplishing scanning operation.
And paper 23 is through first sensing device 25 and second sensing device 26 time, the time detecting paper sheet askew angle that promptly is switched on through Photo Interrupter 27.Please refer to Fig. 3 A and Fig. 3 B; Fig. 3 A is for showing the scheme drawing of automatic paper feeder when paper feed is not crooked of the present invention's one preferred embodiment, and Fig. 3 B is the section-drawing that is shown in paper feed first sensing device 25, second sensing device 26 and Photo Interrupter 27 when not crooked.Paper 23 is not during by feed-in, and Photo Interrupter 27 is interdicted by first 26ca of blocking portion of first 25ca of blocking portion of the first detecting part 25c and the second detecting part 26c fully.If having situation such as crooked during by feed-in, paper 23 do not take place; Then the first end 23a of paper 23 and the second end 23b promote the first contact part 25a and the second contact part 26a simultaneously; Make the first cross bar 25b and second cross bar 26b rotation; Swing between the transmitting terminal 27a of Photo Interrupter 27 and receiving end 27b to drive the first detecting part 25c and the second detecting part 26c; Because the first detecting part 25c and the second detecting part 26c swing simultaneously, so the light of the transmitting terminal 27a of Photo Interrupter 27 emission is simultaneously through the first hole 25cb and the second hole 26cb.Please refer to Fig. 3 C simultaneously, Fig. 3 C is the scheme drawing of the Photo Interrupter signal S1 that when paper is not crooked, produces of display light interceptor 27.Continue in the traveling process at paper; The receiving end 27b of Photo Interrupter 27 continues to receive the light from transmitting terminal 27a; Be rocked to vertex simultaneously to the first detecting part 25c and the second detecting part 26c; Till the light that makes transmitting terminal 27a emission is interdicted by second 25cc of blocking portion and 26cc fully, so Photo Interrupter 27 is switched on very first time T1.
Please refer to Fig. 5 earlier; The signal that this moment, Photo Interrupter 27 was switched on very first time T1 is sent to the electronic printing circuit board assembly 28 of automatic paper feeder 2 earlier; Then be sent to controller 29, controller 29 promptly judges that through signal S1 paper is not crooked, so paper taking module 21 continues paper feed.
Next please refer to Fig. 4 A to Fig. 4 B.Fig. 4 A is for showing the scheme drawing of automatic paper feeder when paper feed is crooked of the present invention's one preferred embodiment, and Fig. 4 B is for being shown in paper feed when crooked, the section-drawing of first sensing device 25, second sensing device 26 and Photo Interrupter 27.If paper 23 is in askew during by feed-in, then the first end 23a of paper 23 promotes the first contact part 25a earlier, makes first cross bar 25b rotation, swings between transmitting terminal 27a and receiving end 27b to drive the first detecting part 25c.Because the second detecting part 25c is not driven as yet during first detecting part 25c swing; So the light of transmitting terminal 27a emission is stopped and can't be sent to receiving end 27b by first 26ca of blocking portion of the second detecting part 26c after through the first hole 25cb, so Photo Interrupter 27 is not switched on as yet.Before the first detecting part 25c is not rocked to vertex; The second contact part 26a is promoted by the second end 23b of paper 23 and the second detecting part 26c is swung; So the light of transmitting terminal 27a emission continues to be sent to receiving end 27b through the first hole 25cb and the second hole 26cb, to the first detecting part 25c be rocked to vertex and the light that makes transmitting terminal 27a emission by second 25cc of blocking portion of first detecting part 25c blocking-up till.Please refer to Fig. 4 C simultaneously, Fig. 4 C is the scheme drawing of the Photo Interrupter signal S2 that when paper sheet askew, produces of Photo Interrupter 27.Shown in Fig. 4 C, Photo Interrupter 27 is switched on second time T 2, because till time of being switched on of Photo Interrupter 27 only is rocked to the first detecting part 25c and is rocked to vertex since the second detecting part 26c, so second time T 2 is less than very first time T1.
Please refer again to Fig. 5; The signal that this moment, Photo Interrupter 27 was switched on second time T 2 is sent to the electronic printing circuit board assembly 28 of automatic paper feeder 2 earlier; Then be sent to controller 29; Controller 29 promptly judges that through this signal paper 23 is crooked, and calculates the skew angle of paper 23 through following formula:
ΔT＝T1-T2，
ΔL＝V×ΔT，
θ＝tan(ΔL/S)
Above-mentioned formula is explained as follows: the time difference Δ T that calculates the very first time T1 and second time T 2; Then, the speed V that is fed of passage period difference Δ T and paper 23 calculates first end 23a of paper 23 and the miles of relative movement difference Δ L of the second end 23b again, and wherein the speed V that is fed of paper 23 is by 29 controls of controller; Can calculate by the length summation S of miles of relative movement difference Δ L and the first cross bar 25b and the second cross bar 26b at last skew angle θ.
After obtaining the skew angle θ of paper 23, controller 29 is judged skew angle θ whether in a recoverable scope immediately, and in the present embodiment, the recoverable scope be ± 5 to spend.If the skew angle θ of paper 23 is in the recoverable scope, then paper taking module 21 lets paper 23 move on and through the roller set of paper 23 travel path downstream parts paper 23 is carried out skew corrected.If paper 23 skew angle θ are excessive, exceed the recoverable scope, then paper taking module 21 stops the concurrent caution that makes mistake of paper feed.If paper 23 skew angle θ are between correctable scope and level off to 0, perhaps paper 23 is not crooked, and then paper taking module 21 continues paper feed and paper 23 do not carried out skew corrected, lets paper 23 directly pass through, to improve processing speed.
Can know that by above preferred embodiment the present invention makes automatic paper feeder 2 when the paper feeding 23 through first sensing device 25, second sensing device 26 and Photo Interrupter 27, can detect paper 23 skew angle θ simultaneously.And after learning paper 23 skew angle θ; Can, paper 23 skew angle θ stop paper feed when exceeding the recoverable scope; Avoid paper 23 to come to harm or automatic paper feeder 2 is destroyed, also can be in the recoverable scope and level off to 0 at paper 23 skew angle θ, when perhaps not having crooked phenomenon; Do not carry out skew corrected and continue paper feed, to increase the whole efficiency of automatic paper feeder 2.
Above-described embodiment is merely explanation technological thought of the present invention and characteristics; Its purpose makes those skilled in the art can understand content of the present invention and is implementing according to this; When can not with qualification claim of the present invention; The equalization of promptly doing according to disclosed spirit generally changes or modifies, and must be encompassed in the claim of the present invention.
Claims (10)
1. an automatic paper feeder is used for paper feeding, comprising:
One leads the paper housing, inner in order to guide this paper to get into this automatic paper feeder;
One Photo Interrupter is positioned at this and leads the paper housing, comprises a transmitting terminal and a receiving end;
One first sensing device; Be positioned at this and lead the paper housing; Comprise one first contact part, one first cross bar and one first detecting part; This first contact part protrudes from this and leads one first outer end of paper housing, and this first detecting part can freely swing between this transmitting terminal and this receiving end and have one first hole;
One second sensing device; Be positioned at this and lead the paper housing; Comprise one second contact part, one second cross bar and one second detecting part; This second contact part protrudes from this and leads one second outer end of paper housing, and this second detecting part can freely swing between this transmitting terminal and this receiving end and have one second hole;
Wherein, When this paper during by feed-in; The two ends of this paper promote this first contact part and this second contact part respectively, make the rotation of this first cross bar and this second cross bar, to drive this first detecting part and this second detecting part is swung between this transmitting terminal and this receiving end; When the swing of this first detecting part and this second detecting part makes this first hole and this second hole complete when overlapping; This Photo Interrupter is switched on a very first time, and when the swing of this first detecting part and this second detecting part made this first hole and this second hole partly overlapping, this Photo Interrupter was switched on for one second time; And
One controller in order to calculate the skew angle of this paper, judges when this Photo Interrupter is switched on a very first time that wherein this paper is not crooked, and when this Photo Interrupter was switched on for one second time, this controller calculated the skew angle of this paper.
2. automatic paper feeder as claimed in claim 1, wherein learn the skew angle of this paper after, if the skew angle of this paper exceeds the recoverable scope, even this automatic paper feeder of this controller stops the concurrent caution that makes mistake of paper feed; If the skew angle of this paper is in the recoverable scope; This controller judges that promptly this automatic paper feeder carries out skew corrected action; But if the skew angle of this paper is in the recoverable scope and convergence or equal 0, then this controller judges that promptly this automatic paper feeder needn't carry out this skew corrected action and continue paper feed.
3. automatic paper feeder as claimed in claim 1; More comprise a paper taking module and a paper separating, be arranged at this and lead on the paper housing that wherein this paper taking module is led the paper housing in order to present this paper through this; And this paper separating is positioned at this paper taking module below, in order to separate this paper.
4. automatic paper feeder as claimed in claim 2, wherein this first contact part and this second contact site are in the downstream part of this paper separating.
5. automatic paper feeder as claimed in claim 1, wherein this first detecting part and this second detecting part are parallel to each other.
6. automatic paper feeder as claimed in claim 4, wherein this first detecting part and this second detecting part are fanning strip, and this first hole and this second hole are positioned near the peripheral of this fanning strip and have the circular arc profile.
7. automatic paper feeder as claimed in claim 5; Wherein, This first contact part and this first detecting part lay respectively at the two ends of this first cross bar and vertical with this first cross bar; This second contact part and this second detecting part lay respectively at the two ends of this second cross bar and vertical with this second cross bar, and this first cross bar and this second cross bar are positioned on the same horizon.
8. automatic paper feeder as claimed in claim 1 more comprises an electronic printing circuit board assembly, is sent to this controller in order to this very first time that this Photo Interrupter is switched on or this second time that is switched on.
9. automatic paper feeder as claimed in claim 1, wherein should the very first time greater than this second time.
10. automatic paper feeder as claimed in claim 8, wherein this paper sheet askew angle is calculated according to following formula:
ΔT＝T1-T2，
ΔL＝V×ΔT，
θ＝tan(ΔL/S)
Wherein: T1 is this very first time, and T2 is this second time, the speed that V is fed for this paper, and Δ L is that the miles of relative movement at two ends of this paper is poor, and S is the length summation of this first cross bar and this second cross bar, and θ is the paper sheet askew angle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105974581A CN102530602A (en) | 2010-12-16 | 2010-12-16 | Automatic paper feeding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105974581A CN102530602A (en) | 2010-12-16 | 2010-12-16 | Automatic paper feeding device |
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| CN102530602A true CN102530602A (en) | 2012-07-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015062361A1 (en) * | 2013-11-04 | 2015-05-07 | 山东新北洋信息技术股份有限公司 | Dielectric detection mechanism and dielectric processing device using same |
| CN105599463A (en) * | 2014-11-13 | 2016-05-25 | 精工爱普生株式会社 | Transportation apparatus and recording apparatus |
| CN107799625A (en) * | 2016-08-30 | 2018-03-13 | 佳能株式会社 | Light breaker unit, sheet carrying device and imaging device |
| CN113120314A (en) * | 2021-04-29 | 2021-07-16 | 金华华东环保设备有限公司 | Bag body conveying equipment |
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Application publication date: 20120704 |