JPS6337042A - Sheet feeder for image former - Google Patents

Sheet feeder for image former

Info

Publication number
JPS6337042A
JPS6337042A JP18086586A JP18086586A JPS6337042A JP S6337042 A JPS6337042 A JP S6337042A JP 18086586 A JP18086586 A JP 18086586A JP 18086586 A JP18086586 A JP 18086586A JP S6337042 A JPS6337042 A JP S6337042A
Authority
JP
Japan
Prior art keywords
paper feed
sheet
feed roller
image forming
separate
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.)
Pending
Application number
JP18086586A
Other languages
Japanese (ja)
Inventor
Hiroo Kobayashi
小林 尋夫
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP18086586A priority Critical patent/JPS6337042A/en
Publication of JPS6337042A publication Critical patent/JPS6337042A/en
Pending legal-status Critical Current

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  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

PURPOSE:To eliminate any influence to image formation due to an impact and secure a good image, by setting up an exclusive driving device in a friction rotor and operating it synchronously with the drive of an image forming part. CONSTITUTION:A semicircular paper feed roller 13 is stopped on a sheet feeder 11 during on-standby in a convex state, and separate idle rollers 27 come into contact with a separate auxiliary pad 29 each, while it comes into contact with a sheet S on the intermediate plate 16 pushed upward by an intermediate plate pushing spring 17. The paper feed roller 13 feeds the sheet S to its clearance with a separate pad 25, while it separates and feeds the topmost sheet along by means of a difference in frictional force between the paper feed roller 13 and the sheet S, the separate pad 25 and the sheet S as well as between these sheets S themselves. At this time, the paper feed roller 13 is being driven by an exclusive paper feed motor 33, so that even if a variation in load happens in rotation, this load variation is in no case transmitted to a sensitizer body of an image forming part via a driving system.

Description

【発明の詳細な説明】 (、イ)産業上の利用分野 本発明は、複写機、プリンタ、印刷機等の画像形成装置
のシート給送装置に係9、詳しくは、摩。
DETAILED DESCRIPTION OF THE INVENTION (1) Industrial Application Field The present invention relates to a sheet feeding device for an image forming apparatus such as a copying machine, a printer, or a printing machine.

擦分離によってシートを1枚ごとに分離・給送するシー
ト給送装置に関する。
The present invention relates to a sheet feeding device that separates and feeds sheets one by one by rubbing.

(ロ)従来の技術 従来、複写機等の画像形成装置のシ−ト給送装置1は、
第7図に示すように、給紙軸2に固設された半月状の給
紙ローラ3を有し、また該給紙ローラ3の下方に配置さ
れた分離パッドを備えていて、これら給紙ローラ3及び
分離パッドで給紙カセット等に収納されているシートS
を画像形成部に向けて1枚ごとに分離・給送する。そし
て、該給紙ローラ3は、画像形成部の画像形成作動に対
応して回転・停止するようになっていて、画像形成作動
開始の際に、一回転クラッチ5を介して画像形成装置の
メインモータからの駆動力が接続されて回転し、シート
を画像形成部に向けて給送し、そしてシートを1枚送る
ごとに駆動力が遮断されて回転を停止し、所定位置に待
機する。
(b) Conventional technology Conventionally, a sheet feeding device 1 of an image forming apparatus such as a copying machine is
As shown in FIG. 7, it has a half-moon-shaped paper feed roller 3 fixedly attached to the paper feed shaft 2, and a separation pad arranged below the paper feed roller 3. Sheet S stored in a paper feed cassette etc. with roller 3 and separation pad
The images are separated and fed one by one toward the image forming section. The paper feed roller 3 is configured to rotate and stop in response to the image forming operation of the image forming unit, and when the image forming operation starts, the paper feed roller 3 is connected to the main unit of the image forming apparatus via the one-turn clutch 5. The driving force from the motor is connected to rotate, feed the sheet toward the image forming section, and each time one sheet is fed, the driving force is cut off, the rotation is stopped, and the sheet waits at a predetermined position.

I/→ 発明が解決しようとする問題点ところで、上記
給紙ローラ3を駆動する画像形成装置のメインモータは
、該給紙ローラ3の駆動だけでなく、画像形成部の感光
体或いはシートを搬送する搬送手段の駆動も行っている
。そこで、給紙ローラ3が回転して、分離パッドを押圧
する際の負荷の増大、或いは給紙ローラ3の回転中の負
荷変動等が衝撃としてメインモータの駆動系を伝わり、
画像形成部の感光体の、像露光時、或いはシートへの像
転写時における回転に影響を及ぼし、シートにプリン!
・アウトされる画像の同期ムラ、ブレ等、画像不良の原
因となる。特に、この現象は光源にレーザー光を使用す
るプリンタに著しく発生する。
I/→ Problems to be Solved by the Invention By the way, the main motor of the image forming apparatus that drives the paper feed roller 3 not only drives the paper feed roller 3 but also transports the photoreceptor or sheet of the image forming section. It also drives the transport means. Therefore, an increase in the load when the paper feed roller 3 rotates and presses the separation pad, or a load change while the paper feed roller 3 rotates, is transmitted as an impact through the main motor drive system.
It affects the rotation of the photoreceptor in the image forming section during image exposure or image transfer to the sheet, causing printing on the sheet!
- This may cause image defects such as uneven synchronization and blurring of the output image. In particular, this phenomenon occurs significantly in printers that use laser light as a light source.

(5) 問題を解決するための手段 本発明は上述問題点を解消することを目的とするもので
あって、摩擦回転体に該摩擦回転体を駆動する専用の駆
動手段を配設して、該駆動手段を画像形成部の駆動に同
期して作動するようにしたものである。
(5) Means for solving the problem The present invention aims to solve the above-mentioned problems, and includes providing the friction rotor with a dedicated drive means for driving the friction rotor. The driving means is configured to operate in synchronization with the driving of the image forming section.

(ホ) 作用 上述構成に基づいて、専用の駆動手段で駆動される摩擦
回転体は、回転中の負荷変動等によって衝撃を生じても
、該衝撃を画像形成部等の他の部位へ伝播することなく
、画像形成部の駆動に同期して、シートを画像形成部へ
1枚ごとに分離・給送する。
(E) Effect Based on the above-described configuration, the friction rotating body driven by a dedicated drive means propagates the impact to other parts such as the image forming section even if an impact is generated due to load fluctuations during rotation. The sheets are separated and fed one by one to the image forming section in synchronization with the driving of the image forming section.

(へ)実施例 以下、図面に沿って本発明の実施例について説明する。(f) Example Embodiments of the present invention will be described below along with the drawings.

本実施例のシート給送装置11は、第2図に示すように
、摩擦材で構成され、かつ給紙軸12に固設された半月
状の給紙ローラ13を有すると共に、多数のシートSを
収納する給紙カセット15を備えている。そして、該給
紙カセット15には中板16が設けられ、また中板押上
げばね17が配設されていて、中板16上に積載されて
いるシートSが上方に押し上げられている。更に、上記
給紙ローラ13の下流には上ガイド19及び下ガイド2
0が配置されてお秒、該下ガイド20がその一側端を搬
送ローラ対21の下ローラを支持する支持軸22に揺動
自在に支持されている。そして、該下ガイド20の自由
端には分離パッド支持台23が固設され、更に該分離パ
ッド支持台23に摩擦材で構成された分離パッド25が
固設されていて、下ガイド20の自由端下方に配置され
た分離パッド押上げばね26の付勢力によって該分離パ
ッド25が上記給紙ローラ13に向けて押上げられる。
As shown in FIG. 2, the sheet feeding device 11 of this embodiment has a half-moon-shaped paper feeding roller 13 made of a friction material and fixed to a paper feeding shaft 12, and has a large number of sheets S. It is equipped with a paper feed cassette 15 that stores the paper. The paper feed cassette 15 is provided with an intermediate plate 16, and is also provided with an intermediate plate pushing-up spring 17, so that the sheets S stacked on the intermediate plate 16 are pushed upward. Furthermore, an upper guide 19 and a lower guide 2 are provided downstream of the paper feed roller 13.
The lower guide 20 is swingably supported at one end by a support shaft 22 that supports the lower roller of the pair of transport rollers 21. A separation pad support 23 is fixed to the free end of the lower guide 20, and a separation pad 25 made of a friction material is also fixed to the separation pad support 23. The separation pad 25 is pushed up toward the paper feed roller 13 by the biasing force of a separation pad push-up spring 26 disposed below the end.

なお、上記給紙ローラ13とシートS1分離パッド25
とシートS1及びシートS同志の*振力をそれぞれF、
G、Hとすれば、その大きさはF>G>Hとなっている
Note that the paper feed roller 13 and the sheet S1 separation pad 25
and the *vibration forces of sheet S1 and sheet S, respectively, are F,
Assuming G and H, their sizes are F>G>H.

また、上記給紙ローラ13の両側には、第3図に詳示す
るように、分離アイドラコロ27.27がそれぞれ給紙
軸12に回転自在に支持されており、これら分離アイド
ラコロ27.27は上記給紙ローラ13の外径よりわず
かに小さい外径にて構成されている。そして、これら分
離アイドラコロ27.27にそれぞれ対向して、上記分
離パッド25の両側に分離補助パッド29.29が形成
されており、これら分離補助パッド29.29は上記分
離パッド25よりも*擦係数が高くなるように構成され
ている。
Further, on both sides of the paper feed roller 13, as shown in detail in FIG. It has an outer diameter slightly smaller than the outer diameter of the paper feed roller 13. Separation auxiliary pads 29 and 29 are formed on both sides of the separation pad 25 to face the separation idler rollers 27 and 27, respectively, and these separation auxiliary pads 29 and 29 have a coefficient of friction higher than that of the separation pad 25. It is configured so that the

一方、上記給紙軸12には、第1図に示すように、一回
転クラッチ30及び該クラッチ30に係合する給紙ギヤ
31が配設されており、また該−回転クラッチ30に臨
んで給紙ソレノイド32が配置されている。そして、該
−回転クラッチ30に隣接してシート給送装置11専用
の給紙モータ33が配置されており、また該モータ33
の出力軸33aにはモータギヤ35が固設されていて、
該モータ33の駆動力がモータギヤ35を介して給紙ギ
ヤ31に伝達される。また、一回転クラッチ30には爪
部30aが形成されており、該爪部30aに給紙ソレノ
イド32に設けられた爪32aが係合している際には、
モータギヤ35を介して給紙ギヤ31に伝達された給紙
モータ33からの駆動力が給紙軸12に伝達されずに遮
断され。
On the other hand, as shown in FIG. 1, the paper feed shaft 12 is provided with a one-rotation clutch 30 and a paper feed gear 31 that engages with the clutch 30. A paper feed solenoid 32 is arranged. A paper feed motor 33 dedicated to the sheet feeding device 11 is arranged adjacent to the rotary clutch 30, and the motor 33
A motor gear 35 is fixed to the output shaft 33a of the
The driving force of the motor 33 is transmitted to the paper feed gear 31 via a motor gear 35. Further, the one-turn clutch 30 is formed with a pawl portion 30a, and when the pawl portion 30a is engaged with the pawl 32a provided on the paper feed solenoid 32,
The driving force from the paper feed motor 33 transmitted to the paper feed gear 31 via the motor gear 35 is not transmitted to the paper feed shaft 12 and is cut off.

該給紙軸12に固設されている半月状の給紙ローラ13
は所定の位置に停止・待機する。また、給紙ソレノイド
32が作動して、一回転クラッチ30の爪部30aと給
紙ソレノイド32の爪32aとの係合が解除されると、
給紙モータ30からの駆動力が給紙軸12に伝達されて
、給紙ローラ13が回転する。更に、該−回転クラッチ
30には突起部30bが設けられており、また該−回転
クラッチ30に隣接してフォトセンサ36が配置されて
いて、半月状の給紙ローラ13がその切欠き部13aを
分離パッド25に対向しく第2図参照)、上に凸の状態
で停止する待機位置(ホームポジション)にある際には
、該突起部3Gbは該フォトセンサ36の検出部を遮る
位置にある。
A half-moon-shaped paper feed roller 13 is fixed to the paper feed shaft 12.
stops and waits at a predetermined position. Further, when the paper feed solenoid 32 is activated and the engagement between the claw portion 30a of the one-turn clutch 30 and the claw 32a of the paper feed solenoid 32 is released,
The driving force from the paper feed motor 30 is transmitted to the paper feed shaft 12, and the paper feed roller 13 rotates. Further, the rotary clutch 30 is provided with a protrusion 30b, a photosensor 36 is disposed adjacent to the rotary clutch 30, and the half-moon-shaped paper feed roller 13 is inserted into the notch 13a. (see FIG. 2) facing the separation pad 25), and is in the standby position (home position) where it stops in an upwardly convex state, the protrusion 3Gb is in a position to block the detection part of the photosensor 36. .

本実施例は以上のような構成よりなるので、待機中のシ
ート給送装置11は半月状の給紙ローラ13が上に凸の
状態で停止しており (第2図参照)、また分離アイド
ラコロ27.27が分離補助パッド29.29にそれぞ
れ接触していると共に、中板押上げばね17によって上
方に押上げられた中板16上のシートSに接触している
。そして、スタートキーが押されると、給紙モータ33
が回転し、モータギヤ35を介して給紙ギヤ31が回転
する。この際、一回転クラッチ30の爪部30aが給紙
ソレノイド32の爪32aに係合していて、給紙軸12
には給紙モータ33からの回転は伝達されず給紙ギヤ3
1が空転する。そして、所定時間経過後給紙ソレノイド
32が作動して、該ソレノイド32の爪32aと一回転
クラッチ30の爪部30aとの係合が解除されると、給
紙モータ33からの回転が給紙軸12に伝達されて、該
給紙軸12に固設された給紙ローラ13が回転し、該給
紙ローラ13の外周が、第4rgJに示すように、シー
トSに接触し、かつ該シートSを介して分離パッド25
を押圧する。そして、該給紙ローラ13はシートSを分
離パラl525との間に送り込むと共に、給紙ローラ1
3とシートS1分離パッド25とシートSル−トS相互
の摩擦力の差によって最上位のシートSのみを分離・給
送する。この際、給紙ローラ131よ専用の給紙モータ
33で駆動されており、例え回転中に負荷の変動を生じ
ても、該負荷の変動が駆動系を介して画像形成部の感光
体に伝わることがない。そして、給紙ローラ13が1回
転して、シートSを所定量搬送すると、一回転クラッチ
30の爪部30aが給紙ソレノイド32の爪32aに当
接して給紙ローラ13への駆動力が遮断され、給紙ロー
ラ13が停止する。なお、該給紙ローラ13の1回転に
よるシート搬送距離が給紙ローラ13と搬送ローラ対2
1との間の距離より長°く設定されているので、停止し
ている搬送ローラ対21に当接したシート5Sはループ
を形成して停止する。この際、分離パッド25及び分離
補助パッド29.29が分離パッド押上げばね26に押
し上げられているので、分離補助パッド29.29は分
離アイドラコロ17゜17に押圧されてシートSを挾持
するので、シー1− Sのループが維持される。ついで
、搬送ローラ対21が回転すると、シートSは、第6図
に示すように、該搬送ローラ対21に挾持・搬送される
Since this embodiment has the above-described configuration, the sheet feeding device 11 on standby is stopped with the half-moon-shaped paper feeding roller 13 convex upward (see Fig. 2), and the separation idler roller 27 and 27 are in contact with the separation auxiliary pads 29 and 29, respectively, and are also in contact with the sheet S on the middle plate 16 pushed upward by the middle plate push-up spring 17. Then, when the start key is pressed, the paper feed motor 33
rotates, and the paper feed gear 31 rotates via the motor gear 35. At this time, the claw portion 30a of the one-turn clutch 30 is engaged with the claw 32a of the paper feed solenoid 32, and the paper feed shaft 12 is engaged with the claw 32a of the paper feed solenoid 32.
The rotation from the paper feed motor 33 is not transmitted to the paper feed gear 3.
1 idles. Then, after a predetermined period of time has elapsed, the paper feed solenoid 32 is activated and the engagement between the pawl 32a of the solenoid 32 and the pawl portion 30a of the one-turn clutch 30 is released, and the rotation from the paper feed motor 33 is activated to feed the paper. The information is transmitted to the shaft 12, and the paper feed roller 13 fixed to the paper feed shaft 12 rotates, and the outer periphery of the paper feed roller 13 contacts the sheet S as shown in the fourth rgJ, and the paper feed roller 13 is rotated. Separation pad 25 through S
Press. Then, the paper feed roller 13 feeds the sheet S between it and the separation parallax 1525, and also feeds the sheet S between the paper feed roller 1
Only the uppermost sheet S is separated and fed by the difference in frictional force between the separating pad 25 and the sheet S route S. At this time, the paper feed roller 131 is driven by a dedicated paper feed motor 33, and even if load changes occur during rotation, the load changes are transmitted to the photoreceptor of the image forming unit via the drive system. Never. Then, when the paper feed roller 13 rotates once and conveys the sheet S by a predetermined amount, the claw portion 30a of the one-turn clutch 30 comes into contact with the claw 32a of the paper feed solenoid 32, and the driving force to the paper feed roller 13 is cut off. Then, the paper feed roller 13 stops. Note that the sheet transport distance by one rotation of the paper feed roller 13 is the distance between the paper feed roller 13 and the transport roller pair 2.
1, the sheet 5S that comes into contact with the stopped pair of transport rollers 21 forms a loop and stops. At this time, since the separation pad 25 and the separation auxiliary pad 29.29 are pushed up by the separation pad push-up spring 26, the separation auxiliary pad 29.29 is pressed by the separation idler roller 17°17 and clamps the sheet S. The Sea 1-S loop is maintained. Then, when the transport roller pair 21 rotates, the sheet S is held and transported by the transport roller pair 21, as shown in FIG.

また、該シートSを分離補助パッド29.29との間で
挾持する分離アイドラコロ27,27は該シートSの搬
送に影響することなく連れ回る。そして、該シートSの
搬送終了後、再び給紙ローラ13が回転を開始して、上
述同様にシー1− Sの分離・給送を繰り返す。
Further, the separation idler rollers 27, 27 which sandwich the sheet S with the separation auxiliary pads 29 and 29 rotate together without affecting the conveyance of the sheet S. After the conveyance of the sheet S is completed, the paper feed roller 13 starts rotating again, and the separation and feeding of the sheet 1-S is repeated in the same manner as described above.

なお、給紙モータ33は、一回転クラッチ30の突起部
30bが1回転してフォトセンサ36の検出部を遮る位
置に戻ってから所定時間後に停止される。
Note that the paper feed motor 33 is stopped a predetermined time after the protrusion 30b of the one-turn clutch 30 makes one revolution and returns to the position where it blocks the detection part of the photosensor 36.

更に、本実施例においては、一回転クラッチ30の突起
部30bをフォトセンサ33にて検知し、これによって
給紙ローラ13のホームポジションを検知するようにし
ているので、例えば給紙作動中に画像形成装置本体のメ
インスイッチが切られるような異常作動によって、給紙
ローラ13が回転途中で停止するようなことがあっても
、再びメインスイッチが投入された際に給紙モータ33
を回転させて給紙ローラ13をホームポジションに復帰
させることができる。
Furthermore, in this embodiment, the protrusion 30b of the one-turn clutch 30 is detected by the photosensor 33, and the home position of the paper feed roller 13 is thereby detected. Even if the paper feed roller 13 stops mid-rotation due to an abnormal operation such as the main switch of the forming device being turned off, the paper feed motor 33 will stop when the main switch is turned on again.
can be rotated to return the paper feed roller 13 to the home position.

(ト)発明の詳細 な説明したように、本発明によると、摩擦回転体を駆動
する専用のaS手段を設けて、画像形成部等の他の部位
の駆動と分離して、回転中の摩擦回転体に負荷変動等に
よって衝撃を生じても、該11j撃を画像形成部へ伝播
することなく、シートを1枚ごとに分離・給送するよう
にしたので、上記衝撃による画像形成部における1iu
i像形成への影響が排除され、良好な画像を得ることが
できろ。
(g) As described in detail, according to the present invention, a dedicated aS means for driving the friction rotor is provided, and is separated from the drive of other parts such as the image forming section, so that friction during rotation is Even if an impact is generated on the rotating body due to load fluctuations, etc., the sheets are separated and fed one by one without propagating the 11j impact to the image forming unit.
It is possible to eliminate the influence on image formation and obtain a good image.

また、gI擦回転体に専用の駆動手段を配設したので、
摩擦回転体の駆動系のギヤ等の数が削減され、*t*回
転体駆動の精度が向上して、より良好な画像を得ること
ができる。
In addition, since a dedicated drive means is provided for the gI rubbing rotor,
The number of gears and the like in the drive system of the friction rotor is reduced, the accuracy of *t* rotor drive is improved, and better images can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の実施例に係るシート給送装置の斜視図
、第2図はその側面図、第3図はその給紙ローラ近傍各
部の詳細を示す斜視図、第4図ないし第6図はそのシー
ト給送作動を示す図、第7図は従来のシート給送装置の
斜視図である。 11・・・画像形成装置のシート給送装置!(シート給
送装置) 、 13・・・摩擦回転体(給紙ローラ) 
、  33・・駆動手段(給紙モータ) 。
FIG. 1 is a perspective view of a sheet feeding device according to an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a perspective view showing details of various parts near the paper feeding roller, and FIGS. 4 to 6 The figure shows the sheet feeding operation, and FIG. 7 is a perspective view of the conventional sheet feeding device. 11...Sheet feeding device of image forming apparatus! (sheet feeding device), 13... friction rotating body (sheet feeding roller)
, 33... Drive means (paper feed motor).

Claims (1)

【特許請求の範囲】[Claims] (1)画像形成部にシートを1枚ごとに分離・給送する
摩擦回転体を備えてなる画像形成装置のシート給送装置
において、 前記摩擦回転体に該摩擦回転体を駆動する専用の駆動手
段を配設して、該駆動手段を前記画像形成部の駆動に同
期して作動するようにした画像形成装置のシート給送装
置。
(1) In a sheet feeding device of an image forming apparatus including a frictional rotary body that separates and feeds sheets one by one to an image forming section, the frictional rotary body is provided with a dedicated drive for driving the frictional rotary body. A sheet feeding device for an image forming apparatus, wherein a driving means is provided to operate in synchronization with driving of the image forming section.
JP18086586A 1986-07-31 1986-07-31 Sheet feeder for image former Pending JPS6337042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18086586A JPS6337042A (en) 1986-07-31 1986-07-31 Sheet feeder for image former

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18086586A JPS6337042A (en) 1986-07-31 1986-07-31 Sheet feeder for image former

Publications (1)

Publication Number Publication Date
JPS6337042A true JPS6337042A (en) 1988-02-17

Family

ID=16090704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18086586A Pending JPS6337042A (en) 1986-07-31 1986-07-31 Sheet feeder for image former

Country Status (1)

Country Link
JP (1) JPS6337042A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318287A (en) * 1991-09-11 1994-06-07 Konica Corporation Bypass sheet feeding device
US5564688A (en) * 1994-10-14 1996-10-15 Hewlett-Packard Company Stripper roller manufacturing method
US5738452A (en) * 1993-12-29 1998-04-14 Canon Kabushiki Kaisha Sheet separation device in a supplying apparatus
US7515865B2 (en) * 2004-03-31 2009-04-07 Brother Kogyo Kabushiki Kaisha Recording medium feeding device and image forming apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318287A (en) * 1991-09-11 1994-06-07 Konica Corporation Bypass sheet feeding device
US5738452A (en) * 1993-12-29 1998-04-14 Canon Kabushiki Kaisha Sheet separation device in a supplying apparatus
US5564688A (en) * 1994-10-14 1996-10-15 Hewlett-Packard Company Stripper roller manufacturing method
US7515865B2 (en) * 2004-03-31 2009-04-07 Brother Kogyo Kabushiki Kaisha Recording medium feeding device and image forming apparatus

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