JP2002274694A - Document feeder - Google Patents

Document feeder

Info

Publication number
JP2002274694A
JP2002274694A JP2001077059A JP2001077059A JP2002274694A JP 2002274694 A JP2002274694 A JP 2002274694A JP 2001077059 A JP2001077059 A JP 2001077059A JP 2001077059 A JP2001077059 A JP 2001077059A JP 2002274694 A JP2002274694 A JP 2002274694A
Authority
JP
Japan
Prior art keywords
adf
platen glass
guide member
document
guide
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.)
Granted
Application number
JP2001077059A
Other languages
Japanese (ja)
Other versions
JP3867504B2 (en
Inventor
Shigetoshi Takamatsu
成年 高松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
Original Assignee
Murata Machinery Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Priority to JP2001077059A priority Critical patent/JP3867504B2/en
Publication of JP2002274694A publication Critical patent/JP2002274694A/en
Application granted granted Critical
Publication of JP3867504B2 publication Critical patent/JP3867504B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Facsimiles In General (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Handling Of Sheets (AREA)

Abstract

PROBLEM TO BE SOLVED: To facilitate the maintenance of an automatic document feeder (ADF) in the ADF automatically incorporating documents and reading their image information. SOLUTION: An inner guide 23 provided on a platen glass 8 and guiding the feeding of the document and an inner guide 22 guiding the documents from the platen glass 8 to a paper discharge tray 4 are attached to separated rotary shafts 35a and 39a respectively, the inner guides 22 and 23 are connected together via connectors 25 and 25, the inner guide 23 is turned by interlocked with the turning of the inner guide 22, and the upper part of the platen glass 8 is released so that the maintenance such as cleaning is performed.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、複写機やファクシ
ミリ等、あるいは、その両機能を有する画像形成装置に
付設される自動原稿搬送装置(ADF)の構造に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an automatic document feeder (ADF) attached to a copier, a facsimile, or an image forming apparatus having both functions.

【0002】[0002]

【従来の技術】従来より、複写機やファクシミリ等、あ
るいは、その両機能を有する画像形成装置の上部には、
自動原稿搬送装置(ADF)が付設されている。このA
DFの取込口にセットされた原稿は、始動操作により自
動的にADF内へ取り込まれ、搬送経路に沿ってUター
ンし、読取位置であるプラテンガラス上を通過して、そ
の画情報が読み取られ、該取込口の下方の排紙口より排
出されていた。
2. Description of the Related Art Conventionally, a copying machine, a facsimile, or the like, or an image forming apparatus having both functions,
An automatic document feeder (ADF) is additionally provided. This A
The document set in the DF inlet is automatically loaded into the ADF by the start operation, makes a U-turn along the transport path, passes over the platen glass at the reading position, and reads the image information. And was discharged from the paper discharge port below the intake port.

【0003】この種のADFは原稿搬送経路に沿った幾
つかのカバーに分割して構成され、原稿ジャム等が発生
した場合、該カバーを開放して、メンテナンスを行う。
これらのカバーは原稿の搬送経路のガイド面を兼ねてお
り、プラテンガラス上に設けられたガイドカバーと、プ
ラテンガラスから排紙口まで原稿を案内する案内カバー
と、給紙口からプラテンガラス付近まで原稿を案内する
上部カバー等から成り、それぞれ別の軸に回動自在に取
り付けられている。また、これらのカバーには原稿を繰
り送る搬送ローラが取り付けられ、該搬送ローラは、各
カバーを閉じた状態で、原稿搬送経路に沿って適宜位置
に配列される。
[0003] This type of ADF is divided into several covers along the document conveying path, and when a document jam or the like occurs, the cover is opened and maintenance is performed.
These covers also serve as guide surfaces for the document transport path.The guide cover provided on the platen glass, the guide cover that guides the document from the platen glass to the paper exit, and It is composed of an upper cover and the like for guiding a document, and is rotatably attached to different shafts. A transport roller for feeding a document is attached to these covers, and the transport rollers are arranged at appropriate positions along the document transport path with each cover closed.

【0004】しかし、上記構成では、回動する各カバー
に搬送ローラが取り付けられているため、ADFの剛性
や、各ローラへの駆動伝達、ローラの位置が一定となら
ない等の問題から、原稿の送りムラが発生しやすい。そ
こで、前記搬送ローラをADF側方の固定フレームで軸
支し、さらにプラテンガラスに対してはガイドカバーを
押し当て、特にプラテンガラス上では送りムラが発生し
ないようにして、改良がなされた。こうして原稿の送り
ムラを減少させて読取精度の向上が図られている。
However, in the above configuration, since the transport roller is attached to each of the rotating covers, there is a problem in that the rigidity of the ADF, the drive transmission to each roller, and the position of the roller are not constant. Feed unevenness is likely to occur. Therefore, the transport roller is supported by a fixed frame on the side of the ADF, and further, a guide cover is pressed against the platen glass so that the feeding unevenness is prevented particularly on the platen glass. In this way, the reading accuracy is improved by reducing the unevenness of the document feeding.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、プラテ
ンガラス付近で紙詰まりが発生した場合等、ADFの上
部カバーを開放し、案内カバーを開放した上で、その奥
のガイドカバーを開放しなければならず、その処理がな
かなか面倒であった。本発明では、この点を鑑み、プラ
テンガラスの清掃等、ADF内のメンテナンスを容易に
することを課題とする。
However, when a paper jam occurs near the platen glass or the like, the upper cover of the ADF must be opened, the guide cover must be opened, and the guide cover behind the ADF must be opened. The process was rather troublesome. In view of this point, an object of the present invention is to facilitate maintenance in the ADF such as cleaning of a platen glass.

【0006】[0006]

【課題を解決するための手段】本発明は以上のような課
題を解決すべく、次のような手段を用いるものである。
すなわち、請求項1記載の如く、プラテンガラス上に設
けられた原稿のガイド部材と、プラテンガラスから排出
トレイまで原稿を案内する案内部材とを、それぞれ別の
軸に回動自在に取り付け、該ガイド部材と該案内部材と
を連結具を介して連結し、案内部材の回動によりガイド
部材を連動して回動させ、該ガイド部材をプラテンガラ
スに接離させる。
The present invention uses the following means in order to solve the above problems.
That is, the guide member for the document provided on the platen glass and the guide member for guiding the document from the platen glass to the discharge tray are rotatably mounted on different shafts, respectively. The member and the guide member are connected via a connector, and the guide member is rotated in conjunction with the rotation of the guide member to move the guide member toward and away from the platen glass.

【0007】また、請求項2記載の如く、前記連結具
を、前記ガイド部材又は前記案内部材の少なくともいず
れか一方に対し係脱自在に取り付ける。
Further, the connecting member is detachably attached to at least one of the guide member and the guide member.

【0008】[0008]

【発明の実施の形態】本発明の実施の形態を、ファクシ
ミリ装置1を参照しながら説明する。図1はファクシミ
リ装置1の斜視図、図2はADF2の斜視図、図3はA
DFカバー21が閉じられた状態でのADF2の側面
図、図4はADFカバー21を開放した状態でのADF
2の側面図、図5ADFカバー21、及びインナーガイ
ド22・23を開放した状態でのADF2の側面図、図
6連結具25の側面図、図7は同じく正面図である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to a facsimile machine 1. 1 is a perspective view of the facsimile machine 1, FIG. 2 is a perspective view of the ADF 2, and FIG.
FIG. 4 is a side view of the ADF 2 with the DF cover 21 closed, and FIG.
2, FIG. 5 is a side view of the ADF 2 with the ADF cover 21 and the inner guides 22 and 23 opened, FIG. 6 is a side view of the coupler 25, and FIG.

【0009】尚、以下の説明では、図1における矢視F
方向を前方として、各構造体の前後左右位置を説明す
る。また、その他の図面における各構造体の前後左右位
置も図1に準ずるものとする。
In the following description, an arrow F in FIG.
The front, rear, left and right positions of each structure will be described with the direction being the front. In addition, the front, rear, left and right positions of each structure in other drawings are also in accordance with FIG.

【0010】図1及び図3に示すように、ファクシミリ
装置1の上部一端には、原稿を自動的に読取装置へ給送
する自動原稿搬送装置(以下「ADF」)2が付設され
ている。
As shown in FIGS. 1 and 3, at an upper end of the facsimile apparatus 1, an automatic document feeder (hereinafter, "ADF") 2 for automatically feeding a document to a reading apparatus is provided.

【0011】給紙トレイ3に載置された原稿は、一枚ず
つ分離されてADF2内の原稿搬送路9へと取り込ま
れ、プラテンガラス8位置で装置本体側の読取装置によ
り原稿の画情報が読み取られた後に、排紙口2bから排
出されて、排紙トレイ4上に積載される。そして、この
読み取られた画情報は電気信号に変換され、電話線を介
して相手先に送信される。
The originals placed on the paper feed tray 3 are separated one by one and taken into the original transport path 9 in the ADF 2, and the image information of the originals is read by the reading device on the apparatus main body side at the platen glass 8. After being read, the sheet is discharged from the sheet discharge port 2 b and stacked on the sheet discharge tray 4. Then, the read image information is converted into an electric signal and transmitted to a destination via a telephone line.

【0012】図2乃至図5に示すように、前記ADF2
は開放可能に構成され、原稿搬送路9で紙詰まりが発生
した場合等、装置上方からのメンテナンスが可能に構成
されている。
As shown in FIGS. 2 to 5, the ADF 2
Is configured to be openable, so that maintenance can be performed from above the apparatus such as when a paper jam occurs in the document conveyance path 9.

【0013】前記ADF2は図2に示すように、原稿搬
送路9のガイド面を形成するADF本体20、ADFカ
バー21、インナーガイド22・23等の枠体と、該原
稿搬送路9に沿って配置されるローラ30・31・32
・33・34・35・36・37・38・・・等から成
り、該ADFカバー21、及び該インナーガイド22・
23は、ADF本体20に対して上下回動可能に取り付
けられている。
As shown in FIG. 2, the ADF 2 includes a frame body such as an ADF main body 20, an ADF cover 21, and inner guides 22 and 23, which form a guide surface of the document transport path 9, and a frame along the document transport path 9. Rollers 30 31 32 arranged
33, 34, 35, 36, 37, 38, etc., the ADF cover 21 and the inner guide 22.
Reference numeral 23 is attached to the ADF main body 20 so as to be vertically rotatable.

【0014】図3に示すように、ADFカバー21はA
DF本体20後端部の回動支点軸29で軸支され、一方
のインナーガイド22・23はそれぞれその一端部を、
ADF本体20側方のフレームに軸支された前記ローラ
35・・の回転軸35a・39aに係合させて、着脱自
在な構成で取り付けられている。
As shown in FIG. 3, the ADF cover 21
The DF body 20 is pivotally supported by a rotation fulcrum shaft 29 at the rear end, and one of the inner guides 22 and 23 has one end thereof,
The rollers 35 are rotatably supported by a frame on the side of the ADF body 20. The rollers 35 are engaged with rotating shafts 35a and 39a, and are mounted in a detachable configuration.

【0015】また、他のローラ30・31・32・33
・34・36・37・38・・・の回転軸もADF本体
20両側方のフレーム28・28に取り付けられてお
り、これにより各ローラ30・31・32・33・34
・35・36・37・38・・・が一定位置に配置され
て、原稿の送りムラを発生させず、精確に繰り送ること
ができる。
Further, the other rollers 30, 31, 32, 33
Are also attached to the frames 28, 28 on both sides of the ADF body 20, so that the rollers 30, 31, 32, 33, 34 are also provided.
.. Are arranged at fixed positions, so that the document can be fed accurately without causing unevenness in document feeding.

【0016】そして、インナーガイド22・23とは、
その両端で連結具25・25により連結され、インナー
ガイド22を回動させると、連動してインナーガイド2
3も回動する構成である。
The inner guides 22 and 23 are
When the inner guide 22 is rotated by the connecting tools 25 at both ends thereof, the inner guide 2
3 also rotates.

【0017】図6及び図7に示すように、前記連結具2
5は、略釣り針状のプレートで、フック部25aと胴部
25bとから成り、該胴部25bの内側面には孔部25
cが形成されている。
As shown in FIG. 6 and FIG.
Reference numeral 5 denotes a substantially hook-shaped plate, which comprises a hook portion 25a and a body portion 25b, and a hole 25 on the inner surface of the body portion 25b.
c is formed.

【0018】また一方、図3に示すように、インナーガ
イド22の一側面の後端部には凸起部22aが凸設さ
れ、また、インナーガイド23の両側面の前端部には凸
起部23aが形成されている。図示は省略するが、イン
ナーガイド22・23の他側の側面においても同様に、
凸起部22a・23aがそれぞれ形成されている。
On the other hand, as shown in FIG. 3, a protruding portion 22a is provided at the rear end of one side surface of the inner guide 22, and a protruding portion is formed at the front end portion of both side surfaces of the inner guide 23. 23a are formed. Although illustration is omitted, the other side surface of the inner guides 22 and 23 is also similarly illustrated.
Protrusions 22a and 23a are formed respectively.

【0019】このような構成で、連結具25の胴部25
bの孔部25cをインナーガイド23の凸起部23aに
嵌め込み、そのフック部25aをインナーガイド22の
凸起部22aに引っ掛ける。こうして連結具25・25
をインナーガイド22・23に容易に取り付けることが
できる。また、フック部25aを凸起部22aから外す
ことで、連結具25を簡単に取り外すことができる構成
にもなっている。
With such a configuration, the trunk 25 of the connecting member 25
The hole 25c of b is fitted into the protrusion 23a of the inner guide 23, and the hook 25a is hooked on the protrusion 22a of the inner guide 22. Thus, the connecting tools 25
Can be easily attached to the inner guides 22 and 23. Also, by removing the hook portion 25a from the protruding portion 22a, the connecting member 25 can be easily removed.

【0020】以上のようにADF2を構成し、該ADF
2内のメンテナンスをするときには、まず、図4に示す
ように、ADFカバー21を開放し、そして、図5に示
すように、インナーガイド22を上方へ回動する。この
とき、インナーガイド22の凸起部22aと係合する連
結具25が引き上げられ、これにより該連結具25と嵌
合するインナーガイド23の凸起部23aも引き上げら
れ、インナーガイド23が上方回動される。こうして、
簡単にプラテンガラス8の上方付近が開放されて、装置
上方からインナーガイド22・23の背面(下面)、並
びにプラテンガラス8の上面を覗き込むことができ、ジ
ャム処理や清掃等が容易に行え、メンテナンス性の向上
を図ることができる。
The ADF 2 is constructed as described above,
When performing the maintenance in 2, the ADF cover 21 is first opened as shown in FIG. 4, and the inner guide 22 is rotated upward as shown in FIG. At this time, the connector 25 engaging with the protrusion 22a of the inner guide 22 is pulled up, whereby the protrusion 23a of the inner guide 23 fitted with the connector 25 is also pulled up, and the inner guide 23 is turned upward. Be moved. Thus,
The upper area of the platen glass 8 is easily opened, and the rear surfaces (lower surfaces) of the inner guides 22 and 23 and the upper surface of the platen glass 8 can be seen from above the apparatus. The maintainability can be improved.

【0021】さらに、連結具25・25をインナーガイ
ド22・23から取り外せば、該インナーガイド22・
23をそれぞれの回転軸35a・39aから取り外すこ
とができ、これによりプラテンガラス8の上方付近がよ
り広く開放されて、さらにメンテナンスがし易くなる。
Further, if the connecting members 25 are removed from the inner guides 22, 23, the inner guides 22.
23 can be detached from each of the rotating shafts 35a and 39a, whereby the upper part of the platen glass 8 is more widely opened and maintenance becomes easier.

【0022】[0022]

【発明の効果】本発明は以上の如く構成したので、以下
のような効果を奏ずるものである。すなわち、請求項1
のように、プラテンガラス上に設けられた原稿のガイド
部材と、プラテンガラスから排出トレイまで原稿を案内
する案内部材とを、それぞれ別の軸に回動自在に取り付
け、該ガイド部材と該案内部材とを連結具を介して連結
し、案内部材の回動によりガイド部材を連動して回動さ
せ、該ガイド部材をプラテンガラスに接離させること
で、簡単にプラテンガラスの上方付近が開放され、装置
上方からガイド部材、案内部材の背面(下面)、並びに
プラテンガラスの上面を覗き込むことができ、ジャム処
理や清掃等が容易に行え、メンテナンス性の向上を図る
ことができる。
As described above, the present invention has the following advantages. That is, claim 1
A guide member for guiding a document provided on the platen glass and a guide member for guiding the document from the platen glass to the discharge tray are rotatably mounted on different shafts, respectively. Is connected via a connecting tool, the guide member is rotated in conjunction with the rotation of the guide member, and the guide member is brought into contact with and separated from the platen glass, so that the upper portion of the platen glass is easily opened, The guide member, the back surface (lower surface) of the guide member, and the upper surface of the platen glass can be viewed from above the apparatus, so that the jam clearance and cleaning can be easily performed, and the maintenance performance can be improved.

【0023】また、請求項2のように、前記連結具を、
前記ガイド部材又は前記案内部材の少なくともいずれか
一方に対し係脱自在に取り付けたので、該連結具を、該
ガイド部材、又は該案内部材から容易に取り外すことが
でき、必要に応じて、該ガイド部材、又は該案内部材を
取り外して、プラテンガラス上方付近をより広く開放す
ることができ、ジャム処理や清掃等のメンテナンスをさ
らに容易に行うことができる。
Further, as in claim 2, the connecting member is
Since the connecting member is detachably attached to at least one of the guide member and the guide member, the connecting member can be easily removed from the guide member or the guide member. By removing the member or the guide member, it is possible to open the area above the platen glass more widely, and it is possible to more easily perform maintenance such as jam clearance and cleaning.

【図面の簡単な説明】[Brief description of the drawings]

【図1】ファクシミリ装置1の斜視図。FIG. 1 is a perspective view of a facsimile machine 1;

【図2】ADF2の斜視図。FIG. 2 is a perspective view of ADF2.

【図3】ADFカバー21が閉じられた状態でのADF
2の側面図。
FIG. 3 shows the ADF with the ADF cover 21 closed.
2 is a side view.

【図4】ADFカバー21を開放した状態でのADF2
の側面図。
FIG. 4 shows the ADF 2 with the ADF cover 21 opened.
Side view.

【図5】ADFカバー21、及びインナーガイド22・
23を開放した状態でのADF2の側面図。
FIG. 5: ADF cover 21, inner guide 22
The side view of ADF2 in the state which opened 23.

【図6】連結具25の側面図。FIG. 6 is a side view of the connector 25;

【図7】同じく正面図。FIG. 7 is a front view of the same.

【符号の説明】[Explanation of symbols]

1 ファクシミリ装置 2 ADF 8 プラテンガラス 21 ADFカバー 22 インナーガイド 22a 凸起部 23 インナーガイド 23a 孔部 25 連結具 25a フック部 25b 胴部 25c 凸起部 35a 回転軸 39a 回転軸 DESCRIPTION OF SYMBOLS 1 Facsimile apparatus 2 ADF 8 Platen glass 21 ADF cover 22 Inner guide 22a Projection part 23 Inner guide 23a Hole part 25 Connector 25a Hook part 25b Body part 25c Projection part 35a Rotation axis 39a Rotation axis

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 2C058 AB06 AD03 AE09 AF04 AF15 DA04 DA11 DA21 DA34 2H076 AA58 BA02 BA10 BA24 BA36 BA39 BA47 3F101 FA01 FB17 FD02 FE02 FE08 FE15 LA02 LA05 LB02 5C062 AA02 AA05 AB17 AB29 AD02 AD06 BA00 5C072 AA01 BA02 BA20 FB08 NA01 XA01  ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C058 AB06 AD03 AE09 AF04 AF15 DA04 DA11 DA21 DA34 2H076 AA58 BA02 BA10 BA24 BA36 BA39 BA47 3F101 FA01 FB17 FD02 FE02 FE08 FE15 LA02 LA05 LB02 5C062 AA02 AA05 AD17 AD12 BA02 BA20 FB08 NA01 XA01

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 プラテンガラス上に設けられた原稿のガ
イド部材と、プラテンガラスから排出トレイまで原稿を
案内する案内部材とを、それぞれ別の軸に回動自在に取
り付け、該ガイド部材と該案内部材とを連結具を介して
連結し、案内部材の回動によりガイド部材を連動して回
動させ、該ガイド部材をプラテンガラスに接離させるこ
とを特徴とする原稿搬送装置。
A guide member for a document provided on a platen glass and a guide member for guiding a document from a platen glass to a discharge tray are rotatably mounted on different shafts, respectively. A document conveying device, wherein the guide member is connected to the member via a connecting member, and the guide member is rotated in conjunction with the rotation of the guide member to move the guide member toward and away from the platen glass.
【請求項2】 前記連結具を、前記ガイド部材又は前記
案内部材の少なくともいずれか一方に対し係脱自在に取
り付けたことを特徴とする請求項1記載の原稿搬送装
置。
2. The document feeder according to claim 1, wherein the connecting member is detachably attached to at least one of the guide member and the guide member.
JP2001077059A 2001-03-16 2001-03-16 Document feeder Expired - Fee Related JP3867504B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001077059A JP3867504B2 (en) 2001-03-16 2001-03-16 Document feeder

Publications (2)

Publication Number Publication Date
JP2002274694A true JP2002274694A (en) 2002-09-25
JP3867504B2 JP3867504B2 (en) 2007-01-10

Family

ID=18933871

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3867504B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006333282A (en) * 2005-05-30 2006-12-07 Kyocera Mita Corp Automatic document feeder, and image forming apparatus including the same
JP2008254892A (en) * 2007-04-05 2008-10-23 Nisca Corp Automatic document feeder
JP2010041561A (en) * 2008-08-07 2010-02-18 Murata Machinery Ltd Automatic document feeder and draft reading device equipped with the same
US20150015927A1 (en) * 2012-02-03 2015-01-15 Brother Kogyo Kabushiki Kaisha Document Reader

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006333282A (en) * 2005-05-30 2006-12-07 Kyocera Mita Corp Automatic document feeder, and image forming apparatus including the same
US7702276B2 (en) 2005-05-30 2010-04-20 Kyocera Mita Corporation Automatic document feeder and image forming apparatus equipped with the same
JP4562186B2 (en) * 2005-05-30 2010-10-13 京セラミタ株式会社 Automatic document feeder and image forming apparatus having the same
JP2008254892A (en) * 2007-04-05 2008-10-23 Nisca Corp Automatic document feeder
JP2010041561A (en) * 2008-08-07 2010-02-18 Murata Machinery Ltd Automatic document feeder and draft reading device equipped with the same
US20150015927A1 (en) * 2012-02-03 2015-01-15 Brother Kogyo Kabushiki Kaisha Document Reader
US9247086B2 (en) 2012-02-03 2016-01-26 Brother Kogyo Kabushiki Kaisha Document reader

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