JP2548619B2 - Electrophotographic printer - Google Patents

Electrophotographic printer

Info

Publication number
JP2548619B2
JP2548619B2 JP2093207A JP9320790A JP2548619B2 JP 2548619 B2 JP2548619 B2 JP 2548619B2 JP 2093207 A JP2093207 A JP 2093207A JP 9320790 A JP9320790 A JP 9320790A JP 2548619 B2 JP2548619 B2 JP 2548619B2
Authority
JP
Japan
Prior art keywords
fold
fixing
roller
paper
perforation
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 - Lifetime
Application number
JP2093207A
Other languages
Japanese (ja)
Other versions
JPH03129374A (en
Inventor
孝雄 佐藤
勝美 菅原
宏知 青山
広 佐藤
雅樹 斉藤
哲 熊谷
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.)
Shinko Seisakusho KK
Original Assignee
Shinko Seisakusho KK
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 Shinko Seisakusho KK filed Critical Shinko Seisakusho KK
Publication of JPH03129374A publication Critical patent/JPH03129374A/en
Application granted granted Critical
Publication of JP2548619B2 publication Critical patent/JP2548619B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Control Or Security For Electrophotography (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)
  • Fixing For Electrophotography (AREA)

Description

【発明の詳細な説明】Detailed Description of the Invention 【産業上の利用分野】[Industrial applications]

本発明は、ミシン目等の折り目を有する連続用紙を用
いる電子写真式プリンタ装置、特に、感光ドラムと定着
器との間に備えたトラクタで連続用紙を搬送する電子写
真式プリンタ装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic printer apparatus that uses continuous paper having creases such as perforations, and more particularly to an electrophotographic printer apparatus that conveys continuous paper with a tractor provided between a photosensitive drum and a fixing device.

【従来技術】[Prior art]

一般に、コンピュータ等の出力装置として用いる高速
プリンタでは、用紙の一定の長さごとに横方向にミシン
目等の折り目(以下、ミシン目という)を設けて折り畳
んだ連続用紙が用いられている。 このプリンタが電子写真方式のものである場合は、コ
ンピュータからの出力情報を露光器で感光体に潜像化
し、さらに転写器でそのトナーを連続用紙に転写して文
字や図形等に可視像化した後、定着器で連続用紙上のト
ナーを定着させる。 一般的に、連続用紙を用いるプリンタでは、感光ドラ
ムと定着器との間に常に用紙の送り孔に係合して搬送力
を与えるトラクタが備えられている。 また、従来の定着器を構成する一対のローラは用紙搬
送面を挟んで上下に配置されているが、これらのローラ
は常に圧接状態にあり、従って、印字とともに搬送され
る連続用紙は各頁が連続して加圧加熱される。
Generally, in a high-speed printer used as an output device of a computer or the like, continuous paper is used in which folds such as perforations (hereinafter referred to as perforations) are provided in a lateral direction for each fixed length of paper and folded. If this printer is of the electrophotographic type, the output information from the computer is converted into a latent image on the photoconductor by the exposure device, and then the toner is transferred to continuous paper by the transfer device and visible images such as characters and figures are formed. After solidification, the fixing device fixes the toner on the continuous paper. Generally, a printer using continuous paper is provided with a tractor between a photosensitive drum and a fixing device, which is always engaged with a paper feed hole to apply a conveying force. Further, although a pair of rollers constituting a conventional fixing device are arranged above and below with a sheet conveying surface interposed therebetween, these rollers are always in pressure contact with each other, and therefore continuous paper conveyed with printing has each page It is continuously pressurized and heated.

【解決しようとする技術課題】[Technical problems to be solved]

ところが、一般的に、用紙には僅かながら水分が含ま
れている。そして、上記のように、従来の定着器では、
複数頁を連続印字する場合は、それらの全頁が連続して
定着器の上下のローラ間を圧接して送られる。とりわ
け、定着器が加熱定着方式の場合は、連続用紙が上下の
加熱ローラと加圧ローラとの間を120℃程度の高熱で圧
接して送られるため、用紙が展延される事態が発生す
る。 また、定着器のローラは、径に軸方向において多少の
誤差(製作誤差)を有することは、避けられていない。
従って、印刷時の用紙の連続搬送中に、前記トラクタと
定着器との間で連続用紙にスキュー(搬送緩み)が発生
し、結果的に用紙にシワが発生し、定着の加熱加圧によ
りそのシワが固められる。この固くなったシワは、ミシ
ン目に発生した時はそのシワがリブの働きをして、定着
後の用紙折り畳みに支障を来していた。 また、上記スキューが拡大すると、トラクタのピンと
用紙の送り孔とのずれが生じ、送り孔の破損、強いては
用紙のジャムに進展する。 上記のスキュー発生による障害を解消する技術として
次のような技術が既に提案されている。 すなわち、連続用紙の蛇行(スキュー)を検出する
と、ミシン目近傍で定着ローラを離間するとともに、蛇
行修正ローラによってスキューを補正する技術(特開平
2−215643号公報)、スキューの発生時に用紙搬送を停
止して定着ローラを離間させてスキューを補正し、補正
後にローラを閉じて用紙搬送を再開する技術(特開平1
−279279号公報)、及び定着ローラを用紙のミシン目及
び無印字領域に対応する部分で離間してスキュー補正を
行う技術(特開昭62−168183号公報)等が既に提案され
ている。 しかしながら、上記第1の従来技術は、定着ローラの
離間により生じた未定着領域を定着するために上記とは
別の定着ローラを設けるとともに、蛇行修正ローラを設
ける必要があるので、構成が複雑となる欠点がある。 上記第2の従来技術は、構成が単純となる反面、スキ
ュー補正のために用紙搬送を停止するので、処理時間を
要する欠点がある。 上記第3の従来技術は、上記第1及び第2の従来技術
の欠点を解消しているものの、上記第1及び第2の従来
技術と同様に用紙のミシン目(折り目)に対して定着動
作がなされる可能性がある。 すなわち、上記第1〜第3の従来技術は、いずれもミ
シン目に対する定着動作がなされる可能性があり、その
ような定着動作がなされたときには、ミシン目の折り癖
が減衰するので、用紙を強制的に折り畳む折り畳み装置
を設ける必要が生じる。 本発明は、上述した従来技術の欠点を除去するために
なされたものであって、簡素な構成により短い処理時間
で用紙のスキュー補正を行うとともに、用紙の折り畳み
装置を不要とした電子写真式プリンタ装置を提供するこ
とを目的とする。
However, generally, the paper contains a small amount of water. And, as mentioned above, in the conventional fixing device,
When a plurality of pages are continuously printed, all the pages are continuously sent by pressing the upper and lower rollers of the fixing device. In particular, when the fixing device is of the heat fixing type, continuous paper is sent by pressing the upper and lower heating rollers and the pressure roller with high heat of about 120 ° C., so that the paper is spread. . Further, it is inevitable that the rollers of the fixing device have some errors (manufacturing errors) in the diameter in the axial direction.
Therefore, during continuous conveyance of the paper during printing, skew (conveyance slack) occurs in the continuous paper between the tractor and the fixing device, and as a result wrinkles occur in the paper, which is caused by heat and pressure for fixing. Wrinkles are hardened. When the hardened wrinkles occurred on the perforations, the wrinkles acted as ribs, which hindered the folding of the sheet after fixing. Further, when the skew is enlarged, the tractor pin and the sheet feeding hole are displaced from each other, and the feeding hole is damaged and the sheet is jammed. The following techniques have already been proposed as techniques for eliminating the above-mentioned obstacles due to the occurrence of skew. That is, when the meandering (skew) of continuous paper is detected, the fixing roller is separated near the perforation and the skew is corrected by the meandering correction roller (JP-A-2-215643). A technique in which the fixing roller is stopped and the fixing roller is separated to correct the skew, and after the correction, the roller is closed and the sheet conveyance is restarted.
No. 279279), and a technique for performing skew correction by separating the fixing roller at portions corresponding to perforations and non-printing areas of the paper (Japanese Patent Laid-Open No. 62-168183) and the like have already been proposed. However, the first prior art requires a fixing roller other than the above in order to fix an unfixed area caused by the separation of the fixing rollers and a meandering correction roller, which makes the structure complicated. There is a drawback. The second conventional technique has a simple structure, but has a drawback that it requires a processing time because the sheet conveyance is stopped for skew correction. Although the third prior art solves the drawbacks of the first and second prior arts, the fixing operation is performed on the perforation (fold) of the paper as in the first and second prior arts. May be done. That is, in each of the above-described first to third conventional techniques, there is a possibility that the fixing operation is performed on the perforations, and when such a fixing operation is performed, the folding tendency of the perforations is attenuated, so that the paper is It is necessary to provide a folding device for forcibly folding. The present invention has been made in order to eliminate the above-mentioned drawbacks of the prior art, and is an electrophotographic printer that performs skew correction of a sheet with a simple configuration in a short processing time and does not require a sheet folding device. The purpose is to provide a device.

【課題を解決するための手段】[Means for Solving the Problems]

本発明は、感光ドラムと定着器との間にトラクタを備
え、前記トラクタでミシン目等の折り目を有する連続用
紙を搬送する電子写真式プリンタ装置において、搬送さ
れる前記連続用紙の折り目及びその折り目の折れ方向を
検出する検出手段と、前記定着器とローラを圧接させた
り、離間させたりする接離手段と、前記検出手段の検出
動作に基づいて、前記連続用紙の印字領域の位置を検知
するとともに、前記接離手段を駆動する制御手段とを有
し、前記制御手段は、前記検出手段が折り目の山折り及
び谷折りの一方を検出したときに、その折り目の直前の
頁の印字領域のほぼ終端からその折り目まで前記接離手
段により前記定着器のローラを離間させ、かつ、前記検
出手段が折り目の山折り及び谷折りの他方を検出したと
きに、その折り目の直前の頁の印字領域のほぼ終端から
その折り目を越え次頁の印字領域のほぼ始端まで前記接
離手段により前記定着器のローラを離間させることを特
徴としている。
The present invention relates to an electrophotographic printer apparatus which includes a tractor between a photosensitive drum and a fixing device, and conveys continuous paper having creases such as perforations by the tractor, and the folds of the conveyed continuous paper and the folds thereof. Detecting means for detecting the folding direction of the continuous paper, contacting / separating means for pressing or separating the fixing device and the roller, and the position of the print area of the continuous paper based on the detecting operation of the detecting means. Together with the control means for driving the contacting and separating means, the control means, when the detecting means detects one of the fold and the valley fold of the fold, of the print area of the page immediately before the fold. When the roller of the fixing device is separated from the almost end to the fold by the contacting / separating means, and the detecting means detects the other of the mountain fold and the valley fold of the fold, the fold of the fold It is characterized by separating the rollers of the fixing device by the moving means to nearly the beginning of the printing area of the next page over the crease approximately the end of the printing region of the previous page.

【作用】[Action]

検出手段が折り目の山折り及び谷折りの一方を検出し
たときに、その折り目の直前の頁の印字領域のほぼ終端
からその折り目まで接離手段により定着器のローラが離
間される。そして、検出手段が折り目の山折り及び谷折
りの他方を検出したときに、その折り目の直前の頁の印
字領域のほぼ終端からその折り目を越え次頁の印字領域
のほぼ始端まで接離手段により定着器のローラが離間さ
れる。 したがって、連続用紙のスキューは、連続用紙の折り
目の山折り及び谷折りのが定着器を通過することに補正
される。 また、一方の折り目が非定着部と定着部の境界となる
ので、その折り目の折り癖が強化される。
When the detection means detects one of the mountain fold and the valley fold of the fold, the roller of the fixing device is separated by the contacting / separating means from almost the end of the printing area of the page immediately before the fold to the fold. When the detecting means detects the other of the mountain fold and the valley fold of the fold, the contacting / separating means extends from almost the end of the print area of the page immediately before the fold to the start of the print area of the next page beyond the fold. The rollers of the fuser are separated. Therefore, the skew of the continuous paper is corrected such that the folds and the valley folds of the continuous paper pass through the fixing device. In addition, since one fold serves as a boundary between the non-fixing portion and the fixing portion, the crease of the fold is strengthened.

【実施例】【Example】

次に、本発明の実施例について図面に基づいて説明す
る。 第1図は、電子写真式プリンタ装置の概略構成を示す
断面図である。同図において、1は連続用紙であり、従
来のこの種のプリンタにおけるのと同様に、図示されて
いない搬送制御部により第一のトラクタ2及び第二のト
ラクタ3を駆動して搬送ガイド4を介して矢印A方向に
搬送される。 搬送制御部は、用紙装填当初、用紙消耗に伴う排出
時、改頁時等における送紙指令スイッチの操作に基づく
場合と、コンピュータからの出力に基づいて印刷を行う
場合とに、それぞれ前記トラクタ2,3を駆動させる。 また、第1図におけるKは、コンピュータの出力情報
を電子写真方式により連続用紙1に可視像化する転写部
であり、中心の感光ドラム20の周囲に帯電器21、露光器
22、現像器23、転写器24、及びクリーニング器25を有し
ている。転写部Kの後方には、連続用紙に転写されたト
ナーを定着させる定着器Tが設けられている。 定着器Tは、用紙搬送面の上下に配置されたローラ5,
6を有する。定着器Tが加熱定着方式のものである場合
は、上側のローラ5が加熱ローラであり、下側のローラ
6が加圧ローラである。また、定着器Tが加圧定着方式
のものである場合は、上下のローラ5,6が加圧ローラで
ある。 転写部Kにおける転写工程の制御、転写工程に対応す
る連続用紙1の転写一への搬送制御、及び感光ドラム周
面への接触による損傷の防止のための、用紙ガイド手段
による用紙の感光ドラムに対する離間動作や接触動作の
制御は、従来と同様に行われる。 本発明の電子写真式プリンタ装置においては、前記定
着器Tに、上下のローラ5,6を離間又は圧接させるため
の接離手段Sが並設されている。この接離手段Sは、レ
バー7をその一端部において軸8を支点として回動自在
に支持し、そのレバー7の他端部側に前記ローラ6を支
持するとともに、レバー7の中間部にローラ9を回転自
在に設けて、このローラ9の周面に対応するカム10を用
紙搬送面の上側に設け、ばね11でレバー7を常時上方に
付勢され、前記カム10の回転軸に、図示されていない駆
動源を連結して構成されていある。 駆動源は、例えば、通電時に180゜回転するロータリ
ーソレノイド又はモータと、駆動信号が一回入力するた
びに前記カム10が180゜回転されるまで前記モータを回
転させるモータ制御回路とで構成することができる。 そして、カム10は、通常は、第2図に示すように、カ
ム10の低部位がローラ9に接触する状態で保持されてお
り、従って、ローラ6がローラ5に圧接しているが、後
記制御手段Cにより前記駆動源が駆動されると、カム10
が180゜回転されてその高部位がローラ9と接触するた
め、ローラ6が第3図に示すように、ローラ5から離間
される。 図において、Mは、搬送される連続用紙のミシン目を
検出するための検出手段であり、光電素子12等で構成し
てあり、プリンタ装置が用紙自動装填機能を備えている
場合は、転写部Kの前方に設けてある連続用紙の先端検
出部を検出手段に兼用している。しかし、検出手段Mの
設置位置は、とくに制限されない。 Cは、前記検出手段Mの検知出力に基づいて、前記接
離手段Sの駆動源を動作させる制御手段である。この制
御手段Cは、第4図に示すように、CPU、ROM及びRAMを
有するマイクロコンピュータにより構成されている。CP
Uは、インターフェース(I/O)を介して前記検出手段
M、搬送手段T及び接離手段Sに接続されている。 ミシン目の検知出力に基づいてどの様なタイミングで
駆動源を制御するかは、検出手段Mの設置位置、連続用
紙のミシン目間距離、非定着領域の設定範囲及び用紙の
搬送ステップ管理により決定される。 使用する連続用紙のミシン目間距離は、予め用紙製造
規格により定められている。また、検出手段Mの取付け
位置からローラ5,6の圧接点までの距離は、予め定めら
れている。したがって、搬送される連続用紙のミシン目
(先端部)が検出手段Mにより検出されてから、そのミ
シン目が定着器のローラ圧接点に到達するタイミング
は、用紙搬送のステップ管理により、容易に計測でき
る。上記ステップ管理は、搬送手段の駆動部であるステ
ッピングモータに用紙搬送のために与えられるパルスの
計数管理のことをいう。 制御手段Cは、検出手段Mからの検出信号の入力に基
づきミシン目が定着部の圧接点近傍に到達するタイミン
グを計測して、そのタイミングに前記接離手段Sに制御
信号を与えてその駆動源を所定時間駆動させて、ローラ
6をローラ5から離間させるようになっている。 上記構成により、今、連続用紙の先端部を第一のトラ
クタ2にセットし、送紙指令スイッチ(図示せず)をON
すると、制御手段Cが搬送手段Tの駆動部を駆動させる
ことにより、連続用紙が第1図の矢印A方向に搬送さ
れ、検出手段Mからの検出信号に基づいて、その用紙の
印字領域の始端部が印刷開始位置に対応する位置まで搬
送された時点で、コンピュータが転写部Kに印刷情報を
出力できる態勢にある場合は、その出力情報に基く印刷
が開始されて、用紙の搬送が継続される。しかし、コン
ピュータが転写部Kに印刷情報を出力できる態勢にない
場合は、搬送を停止して、コンピュータからの印刷要求
を待機する。 転写部Kによる転写の工程を完了した連続用紙は、第
一のトラクタ2と同期して回転されている第二のトラク
タ3によりさらに搬送され、次工程の定着部に搬送さ
れ、この定着部において上下の圧接するローラ5,6より
熱と圧力を加えられて、連続用紙上のトナーが定着され
る。 そして、上記印刷に伴う連続用紙の搬送により、検出
手段Mが先のミシン目を検出した時に出力した検出信
号、又は次のミシン目を検出したときに出力した検出信
号に基き、制御手段Cは、ミシン目が定着部のローラ5,
6の圧接点近傍に達した時に、すなわち、当該頁の印字
領域の終端から次頁の印字領域の始端の間において、接
離手段Sの駆動源に駆動信号を与えてこれを駆動させる
ので、カム10が回転し、そのカムの高部位がローラ9に
対向したときにレバー7が軸8を中心として第3図にお
いて反時計方向に回動する。したがって、このレバー7
に支持されているローラ6がローラ5から離間されるた
め、第5図に示すように、ミシン目slの前後の定着領域
(印字領域)FAの間に非定着領域NFAが形成される。 1頁の定着ごとに定着器のローラが離間されるので、
その間に用紙搬送スキューが補正される。 また、加熱定着方式の場合は、レバー7の先端部にこ
れと直角方向に屈曲された用紙押さえ片13を設けておけ
ば、ローラ5,6の離間と同時に、その用紙押さえ片13が
連続用紙1を熱ローラ5から離間させるので、ミシン目
に熱が伝達することもない。したがって、用紙のミシン
目が熱により硬化して折れ癖が減衰されることがないと
ともに、用紙のこげつき、加熱ローラや加圧ローラの変
形が防止される。 ミシン目が検出手段Mを通過した後は、制御手段Cが
接離手段の駆動を終止さえるので、カム10が再び所定量
だけ回転され、そのカムの低部位がローラ9に対向し
て、ローラ5,6再び圧接する状態に戻るから、コンピュ
ータから出力情報が続く限り、用紙の搬送に伴い、検出
手段Mと制御手段Cと接離手段Sとにより各ミシン目ご
とに、上記の定着器の一時開閉が繰り返される。 上記の実施例では、用紙先端検出部を検出手段Mに兼
用したので、接離手段Sの駆動制御を、検出手段Mから
の検出信号に基く搬送ステップ管理に基いて行うように
したが、検出手段を定着器至近に設けた場合は、その検
出手段の検出信号に基いて直接に接離手段を制御するこ
ともできる。また、接離手段Sは、レバー7をカム10で
移動させるようにしたが、ローラ6をローラ5から離間
させる手段は、これに制限されるものではなく、他の周
知の技術を使用できる。 しかしながら、上記のように、各ミシン目ごとに直前
頁の印字領域の終端から直後頁の印字領域の始端までを
非定着領域とするときは、スキュー補正効果を確実に得
られるが、この非定着領域は定着領域に比し、水分をま
だ含んでいて腰が弱いため、用紙の品質によっては定着
器を通過して連続用紙集積位置まで搬送落下されるまで
の間に、第6図に示すように、各非定着領域NFAにミシ
ン目の前後両側を架橋するようなシワSHRが多数発生し
やすい。このようなシワは、リブの作用をして折り畳み
に支障を来す場合がある。 本発明者らは、スキューが補正されるとともに、ミシ
ン目の折り癖の減衰が生じないような、定着器のローラ
離間タイミングについて、種々研究した。 第7図(a)は第一比較例の第1案を示す斜視図、第
7図(b)は第2案を説明する要部斜視図である。第一
比較例では、制御手段Cを搬送ステップ管理により連続
用紙1の印字領域終端が定着器のローラ圧接点に到達し
た時点からミシン目直前が圧接点に到達する時点までの
間、各圧ローラ6を加熱ローラ5から離間させるように
構成してある。 第2案では、搬送される連続用紙1のミシン目がロー
ラ圧接点を通過した時点から次頁の転写領域前端が圧接
点に到達するまでの間、加圧ローラ6を加熱ローラ5か
ら離間させるように制御手段Cを構成してある。 上記範囲を非定着領域NFAとする場合は、用紙搬送速
度が速いのに比し、離間時間はごく短いため、スキュー
が充分に補正されない。 上記の第一比較例の場合は、ミシン目から転写領域ま
での間の距離を必要とするから、転写領域とミシン目の
間の距離が小さい場合は採用困難である。換言すれば、
非定着領域を確保すると印字領域が制約される虞があ
る。 第二比較例は、非定着領域を取らずにスキュー補正が
でき、かつ、シワ発生が防止され、しかも、印字領域の
拡大も可能となるようにしたものである。 このような機能を実現するため、第二比較例では、制
御手段Cを次のように構成した。すなわち、第8図
(a)に示すように、第1案では、搬送ステップ管理と
接離手段の制御により、用紙のミシン目がローラ圧接点
を通過するまで熱定着F1を行い、圧接点を通過した時点
で加圧ローラを離間して定着を停止し、次に搬送手段を
逆転して連続用紙を上記停止位置からミシン目を越えな
い位置まで所定量逆搬送させた後、再び加圧ローラを圧
接して用紙を正方向に搬送して熱定着F2を行う。これに
より、第8図(a)の記号Wで示した領域は前後の頁の
熱定着F1,F2がオーバーラップする。したがって、ミシ
ン目部分が熱定着されるから、シワの発生が防止され、
また、ミシン目を越えた位置で加圧ローラが一時離間さ
れるため、スキューが補正される。 さらに、ミシン目付近まで逆搬送されてから次の頁の
印字領域に対する定着が開始されるから、印字領域が制
約されることがない。 第8図(b)の第2案及び(c)の第3案では、
(a)と同様にミシン目まで熱定着するとともに、ミシ
ン目を避けた位置で定着領域をオーバーラップさせるよ
うにしたものであるが、(b)はミシン目直前まで定着
(F1)を行い、用紙を一旦所定量逆搬送した後、再び正
方向に搬送すると同時に定着(F2)を行うようにしたも
のであり、(c)はミシン目の上まで定着(F1)を行
い、一旦、所定量逆搬送して再び正方向に搬送すると同
時に定着(F2)を行うようにしたものである。いずれの
場合にも、ミシン目におけるシワ発生が防止され、か
つ、転写領域の狭隘化が防止され、又は転写領域の拡大
が可能となる。 しかし、連続印字の場合の処理速度が低下する。 本発明者らは、定着器のローラを連続用紙のミシン目
の近傍で離間させるという上記の基本的思想の中で、ス
キュー補正が充分に行われ、特に山折り部の折り畳み性
能が改善され、さらに、連続印字の処理速度の低下をき
たさないような最善の制御態様を探求して各種の実験を
行った結果、上記検出手段M及び制御手段Cは、次のよ
うに構成することが最適であることを見出だした。 すなわち、第4図における検出手段Mには、連続用紙
のミシン目を検出する機能と、そのミシン目が山折りか
谷折りかを検出する機能を有するものを用いる。このよ
うな連続用紙のミシン目折り方向検出手段は、本件出願
人により特開平2−13558号公報で開示したものを用い
ることができる。しかし、山折りと谷折りの検出方法に
は、機械電気的に検出するものに限らず、光電的に検出
することも可能である。 そして、同じく第4図における制御手段Cは、第8図
に示すように、前記検出手段Mからの山折り検出信号の
入力に基いて、当該山折りのミシン目slmが定着器の圧
接点近傍に到達した時点からそのミシン目が圧接点に到
達した時点又はその直前まで、より正確には当該山折り
のミシン目の直前の頁の印字領域PAの終端から当該ミシ
ン目slmまで、接離手段Sを駆動させてローラを離間さ
せ、また、検出手段Mからの山折り検出信号の入力に基
いて、当該山折りのミシン目slmが定着器の圧接点近傍
に到着した時点からのミシン目が圧接点に到達した時点
からそのミシン目が圧接点に到達した時点又はその直前
まで、より正確には、当該山折りのミシン目の直前の頁
の印字領域PAの終端から当該ミシン目slmまで、接離手
段Sを駆動させてローラを離間させ、また、検出手段M
から谷折り検出信号を入力したことに基いて、当該谷折
りのミシン目slvが定着器の圧接点近傍に到達した時点
からそのミシン目を越えて次頁の印字領域PAの始端ま
で、接離手段Sを駆動してローラを離間させるようにし
てある。 このように、山折りにおいては、そのミシン目の直前
頁の印字領域の終端からそのミシン目まで非定着領域NF
A1とし、谷折りにおいてはそのミシン目の直前頁の印字
領域の終端からそのミシン目の直後の印字領域の始端ま
でを非定着領域NFA2とすることにより、各ミシン目にお
いてミシン目の折り癖が減衰されないばかりでなく、山
折り部においてはミシン目直後の部分が定着により水分
除去と紙質硬化をするため、印字終了後に落下する連続
用紙の自重によりそのミシン目が山折り方向の力を受け
た際に容易に折り畳まれる特性を備えるに至る。すなわ
ち、山折りにおいては、ミシン目の折り癖が強化され
る。 また、谷折りにおいては、ミシン目の前後の頁の印字
領域の終端から始端まで比較的大きい幅の非定着領域NF
A2が確保されるから、高速プリンタの用紙搬送速度が速
くとも、各頁における連続搬送により生じうるスキュー
が充分補正される。そして、この谷折りにおいても、折
り癖が減衰されないので、折り畳みが容易にできる。 用紙の厚さによっては、非定着領域の幅と用紙の折り
方向との関係を、上記の例の逆にしてもよい。
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a schematic configuration of an electrophotographic printer device. In the figure, reference numeral 1 is a continuous paper, and like the conventional printer of this type, the first tractor 2 and the second tractor 3 are driven by a not-shown conveyance control unit to move the conveyance guide 4. It is conveyed in the direction of arrow A via. The transport control unit is configured to operate the tractor 2 when the paper is loaded, when the paper is exhausted due to consumption of the paper, when the paper feed command switch is operated at the time of a page break, and when printing is performed based on the output from the computer. , 3 is driven. Further, K in FIG. 1 is a transfer unit that visualizes the output information of the computer on the continuous paper 1 by the electrophotographic method, and the charger 21 and the exposure unit are provided around the central photosensitive drum 20.
22, a developing device 23, a transfer device 24, and a cleaning device 25. Behind the transfer section K, a fixing device T for fixing the toner transferred onto the continuous paper is provided. The fixing device T includes rollers 5, which are arranged above and below the paper transport surface.
With 6. When the fixing device T is of a heat fixing type, the upper roller 5 is a heating roller and the lower roller 6 is a pressure roller. When the fixing device T is of the pressure fixing type, the upper and lower rollers 5 and 6 are pressure rollers. For controlling the transfer process in the transfer unit K, controlling the transfer of the continuous paper 1 to the transfer unit corresponding to the transfer process, and preventing damage due to contact with the peripheral surface of the photosensitive drum, the paper guide unit is used to transfer the paper to the photosensitive drum. The control of the separation operation and the contact operation is performed in the same manner as the conventional one. In the electrophotographic printer apparatus of the present invention, the fixing device T is provided with contacting / separating means S for separating or pressing the upper and lower rollers 5 and 6 in parallel. The contacting / separating means S rotatably supports the lever 7 at one end thereof with the shaft 8 as a fulcrum, supports the roller 6 at the other end of the lever 7, and supports the roller at the intermediate part of the lever 7. 9 is rotatably provided, and a cam 10 corresponding to the peripheral surface of the roller 9 is provided on the upper side of the sheet conveying surface. A lever 11 is constantly urged upward by a spring 11 so that the rotary shaft of the cam 10 is shown in the drawing. It is configured by connecting drive sources which are not provided. The drive source includes, for example, a rotary solenoid or a motor that rotates 180 ° when energized, and a motor control circuit that rotates the motor until the cam 10 rotates 180 ° each time a drive signal is input. You can As shown in FIG. 2, the cam 10 is normally held in a state in which the lower portion of the cam 10 contacts the roller 9, and therefore the roller 6 is in pressure contact with the roller 5, which will be described later. When the drive source is driven by the control means C, the cam 10
Is rotated 180 ° and its high portion comes into contact with the roller 9, so that the roller 6 is separated from the roller 5 as shown in FIG. In the figure, M is a detection unit for detecting perforations of the conveyed continuous paper, which is composed of a photoelectric element 12 and the like, and is a transfer unit when the printer apparatus has a paper automatic loading function. The leading edge detecting portion of the continuous paper provided in front of K also serves as the detecting means. However, the installation position of the detection means M is not particularly limited. C is a control means for operating the drive source of the contacting / separating means S based on the detection output of the detecting means M. As shown in FIG. 4, the control means C is composed of a microcomputer having a CPU, ROM and RAM. CP
U is connected to the detection means M, the transport means T, and the contact / separation means S via an interface (I / O). At what timing the drive source is controlled based on the perforation detection output is determined by the installation position of the detection means M, the perforation distance of continuous paper, the setting range of the non-fixing area, and the paper conveyance step management. To be done. The distance between the perforations of the continuous paper to be used is predetermined by the paper manufacturing standard. Further, the distance from the mounting position of the detecting means M to the pressure contacts of the rollers 5 and 6 is predetermined. Therefore, the timing at which the perforation reaches the roller pressure contact of the fixing device after the perforation (tip portion) of the conveyed continuous paper is detected by the detecting means M can be easily measured by the step control of the paper conveyance. it can. The step management refers to the management of counting the pulses given to the stepping motor, which is the drive unit of the transporting means, for transporting the sheet. The control means C measures the timing at which the perforations reach the vicinity of the pressure contact of the fixing portion based on the input of the detection signal from the detection means M, and gives a control signal to the contacting / separating means S at that timing to drive it. The source is driven for a predetermined time to separate the roller 6 from the roller 5. With the above configuration, the leading edge of the continuous paper is now set on the first tractor 2 and the paper feed command switch (not shown) is turned on.
Then, the control means C drives the drive part of the transport means T to transport the continuous paper in the direction of arrow A in FIG. 1, and based on the detection signal from the detection means M, the start end of the print area of the paper. When the computer is ready to output the print information to the transfer unit K at the time when the copy is conveyed to the position corresponding to the print start position, the printing is started based on the output information and the conveyance of the paper is continued. It However, when the computer is not ready to output the print information to the transfer section K, the conveyance is stopped and the print request from the computer is waited. The continuous paper that has completed the transfer process by the transfer unit K is further transported by the second tractor 3 which is rotated in synchronization with the first tractor 2, and is transported to the fixing unit in the next process. Heat and pressure are applied from the upper and lower pressure-contacting rollers 5, 6 to fix the toner on the continuous paper. Then, based on the detection of the detection signal output when the detection unit M detects the previous perforation or the detection signal output when the next perforation is detected, the control unit C determines , Roller 5 where the perforation is the fixing section,
When the vicinity of the pressure contact of 6 is reached, that is, between the end of the print area of the page and the start of the print area of the next page, a drive signal is applied to the drive source of the contact / separation unit S to drive it. When the cam 10 rotates and the high portion of the cam faces the roller 9, the lever 7 rotates about the shaft 8 in the counterclockwise direction in FIG. Therefore, this lever 7
Since the roller 6 supported by the roller 6 is separated from the roller 5, a non-fixing area NFA is formed between the fixing areas (printing areas) FA before and after the perforations sl as shown in FIG. Since the rollers of the fixing device are separated for each fixing of one page,
During that time, the sheet conveyance skew is corrected. Further, in the case of the heat fixing method, if a paper pressing piece 13 bent in a direction perpendicular to the lever 7 is provided at the tip of the lever 7, the paper pressing piece 13 will be separated from the continuous paper when the rollers 5 and 6 are separated. Since 1 is separated from the heat roller 5, heat is not transferred to the perforations. Therefore, the perforation of the paper is not hardened by heat and the crease is not attenuated, and the paper is prevented from sticking and deformation of the heating roller and the pressure roller is prevented. After the perforation passes through the detecting means M, the control means C stops the driving of the contacting / separating means, so that the cam 10 is rotated again by a predetermined amount, and the lower portion of the cam faces the roller 9 to move the roller. As the output information from the computer continues, the detection means M, the control means C, and the contacting / separating means S are used for each perforation line of the fixing device as the paper is conveyed. The temporary opening and closing is repeated. In the above-described embodiment, since the sheet leading edge detecting section is also used as the detecting means M, the drive control of the contacting / separating means S is performed based on the conveyance step management based on the detection signal from the detecting means M. When the means is provided near the fixing device, the contacting / separating means can be directly controlled based on the detection signal of the detecting means. Further, the contacting / separating means S is configured to move the lever 7 by the cam 10, but the means for separating the roller 6 from the roller 5 is not limited to this, and other well-known techniques can be used. However, as described above, when the area from the end of the print area of the immediately preceding page to the start of the print area of the immediately following page is set as the non-fixing area for each perforation, the skew correction effect can be surely obtained. Compared to the fixing area, the area is still moist and weak, so depending on the quality of the paper, it may pass through the fixing device and be transported to the continuous paper stacking position, as shown in FIG. In addition, many wrinkle SHRs that cross the front and rear sides of the perforation are likely to occur in each non-fixed area NFA. Such wrinkles may act as ribs and hinder folding. The present inventors have conducted various studies on the roller separation timing of the fixing device so that the skew is corrected and the perforation creases are not attenuated. FIG. 7 (a) is a perspective view showing the first proposal of the first comparative example, and FIG. 7 (b) is a perspective view showing the essential parts of the second proposal. In the first comparative example, each pressure roller is controlled from the time point when the end of the printing area of the continuous paper 1 reaches the roller pressure contact point of the fixing device to the time point immediately before the perforation reaches the pressure contact point by the control means C by carrying step management. 6 is separated from the heating roller 5. In the second alternative, the pressure roller 6 is separated from the heating roller 5 from the time when the perforation of the conveyed continuous paper 1 passes through the roller pressure contact to the time when the front end of the transfer area of the next page reaches the pressure contact. Thus, the control means C is configured. When the above range is set as the non-fixing area NFA, the sheet conveyance speed is high, but the separation time is very short, so that the skew is not sufficiently corrected. In the case of the above-mentioned first comparative example, a distance between the perforation and the transfer area is required, so that it is difficult to adopt when the distance between the transfer area and the perforation is small. In other words,
If the non-fixing area is secured, the printing area may be restricted. In the second comparative example, skew correction can be performed without taking the non-fixing area, wrinkles can be prevented, and the printing area can be enlarged. In order to realize such a function, in the second comparative example, the control means C is configured as follows. That is, as shown in FIG. 8 (a), in the first plan, thermal fixing F1 is performed until the perforation of the paper passes through the roller pressure contact by controlling the conveyance step and the contact / separation means, and the pressure contact is made. When it passes, the pressure roller is separated to stop the fixing, and then the conveying means is reversed to reversely convey the continuous paper from the stop position to a position that does not exceed the perforations, and then the pressure roller is again conveyed. Is pressed to convey the paper in the forward direction and perform thermal fixing F2. As a result, the area indicated by the symbol W in FIG. 8A overlaps the heat fixing F1 and F2 on the preceding and following pages. Therefore, since the perforated portion is heat-fixed, the occurrence of wrinkles is prevented,
Further, since the pressure roller is temporarily separated at the position beyond the perforation, the skew is corrected. Furthermore, since the fixing to the print area of the next page is started after the sheet is conveyed backward to the vicinity of the perforations, the print area is not restricted. In the second plan of FIG. 8 (b) and the third plan of (c),
Similar to (a), the fixing area is heat-fixed to the perforation, and the fixing area is overlapped at a position avoiding the perforation, but (b) is fixing (F1) until just before the perforation, After the paper is conveyed by a predetermined amount in the reverse direction, it is conveyed in the forward direction again and at the same time, the fixing (F2) is performed, and (c) shows the fixing (F1) up to the perforation and then the predetermined amount. It is configured such that fixing (F2) is performed at the same time when the sheet is conveyed in the reverse direction and then conveyed in the forward direction again. In any case, it is possible to prevent the occurrence of wrinkles in the perforations, prevent the transfer area from being narrowed, or enlarge the transfer area. However, the processing speed in the case of continuous printing decreases. In the above basic idea of separating the rollers of the fixing device in the vicinity of the perforations of the continuous paper, the present inventors performed sufficient skew correction, and particularly improved the folding performance of the mountain fold portion, Furthermore, as a result of conducting various experiments in search of the best control mode that does not reduce the processing speed of continuous printing, it is optimal that the detection means M and the control means C are configured as follows. I found something. That is, as the detecting means M in FIG. 4, one having a function of detecting perforations of continuous paper and a function of detecting whether the perforations are mountain folds or valley folds are used. As the perforation folding direction detecting means for such continuous paper, the one disclosed in Japanese Patent Laid-Open No. 2-13558 by the present applicant can be used. However, the method of detecting a mountain fold and a valley fold is not limited to the method of mechanically and electrically detecting, and it is also possible to detect photoelectrically. Similarly, as shown in FIG. 8, the control means C in FIG. 4 determines that the perforation slm of the mountain fold is near the pressure contact of the fixing device based on the input of the mountain fold detection signal from the detecting means M. From the end of the print area PA of the page immediately before the perforation of the mountain fold to the perforation slm, more precisely, from the time when the perforation reaches the pressure contact or immediately before that. S is driven to separate the rollers, and based on the input of the mountain fold detection signal from the detection means M, the perforation slm of the mountain fold is determined from the time when the perforation slm arrives near the pressure contact of the fixing device. From the time of reaching the pressure contact to the time of the perforation reaching the pressure contact or immediately before that, more accurately, from the end of the print area PA of the page immediately before the perforation of the mountain fold to the perforation slm, The contacting / separating means S is driven to separate the rollers. And the detecting means M
Based on the input of the valley fold detection signal from, the contact and separation from the time when the perforation slv of the valley fold reaches the vicinity of the pressure contact of the fixing device and beyond the perforation to the beginning of the printing area PA on the next page. The means S is driven to separate the rollers. As described above, in mountain folding, the non-fixing area NF extends from the end of the print area on the page immediately preceding the perforation to the perforation.
In the valley fold, by setting the non-fixing area NFA2 from the end of the print area on the page immediately preceding the perforation to the start of the print area immediately after the perforation, the perforation crease at each perforation is Not only is it not attenuated, but in the mountain folding part, the part immediately after the perforation removes moisture and hardens the paper due to fixing, so the perforation received force in the mountain folding direction due to the weight of the continuous paper falling after printing. When it comes to the property of being easily folded. That is, in mountain folding, the folding habit of the perforations is strengthened. In the valley fold, a non-fixing area NF having a relatively large width from the end to the start of the print area of the pages before and after the perforation.
Since A2 is ensured, even if the paper conveyance speed of the high-speed printer is high, the skew that may occur due to continuous conveyance on each page is sufficiently corrected. Further, even in this valley fold, the folding tendency is not attenuated, so that the folding can be facilitated. Depending on the thickness of the paper, the relationship between the width of the non-fixing area and the folding direction of the paper may be reversed from the above example.

【発明の効果】【The invention's effect】

以上詳述したように、本発明によれば、検出手段が折
り目の山折り及び谷折りの一方を検出したときに、その
折り目の直前の頁の印字領域のほぼ終端からその折り目
まで接離手段により定着器のローラが離間される。そし
て、検出手段が折り目の山折り及び谷折りの他方を検出
したときに、その折り目の直前の頁の印字領域のほぼ終
端からその折り目を越え次頁の印字領域のほぼ始端まで
接離手段により定着器のローラが離間される。 したがって、連続用紙のスキューを、連続用紙の折り
目の山折り及び谷折りのが定着器を通過するごとに補正
するので、従来装置に比較して、簡素な構成により短い
処理時間で用紙のスキュー補正を行うできる。 また、連続用紙の一方の折り目が非定着部と定着部の
境界となるので、その折り目の折り癖が強化されるた
め、用紙を容易に折り畳むことができ、従来装置と違っ
て用紙を強制的に折り畳む装置が不要となる。
As described above in detail, according to the present invention, when the detecting means detects one of the mountain fold and the valley fold of the fold, the contacting / separating means extends from almost the end of the print area of the page immediately before the fold to the fold. This separates the rollers of the fixing device. When the detecting means detects the other of the mountain fold and the valley fold of the fold, the contacting / separating means extends from almost the end of the print area of the page immediately before the fold to the start of the print area of the next page beyond the fold. The rollers of the fuser are separated. Therefore, since the skew of the continuous paper is corrected every time the folds and valleys of the folds of the continuous paper pass through the fixing device, the skew correction of the paper can be performed in a shorter processing time with a simpler configuration than the conventional device. Can be done. In addition, since one fold of continuous paper serves as a boundary between the non-fixing portion and the fixing portion, the crease of the fold is strengthened, so that the paper can be easily folded and the paper is forced to be forced unlike the conventional device. No need for a folding device.

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

第1図はこの発明の一実施例の概略断面図、第2図は接
離手段の構成の一例を示す側面図、第3図は同接離手段
の動作状態を示す側面図、第4図は制御手段の電気的構
成を示すブロック図、第5図は連続用紙に非定着領域を
設けた例を示す斜視図、第6図は非定着領域にシワが発
生した例を示す斜視図、第7図は定着領域と非定着領域
との位置関係を示す斜視図であり、(a),(b)はそ
れぞれ非定着領域を設ける位置を変えた例を示す。第8
図は定着領域とミシン目との位置関係を示す斜視図、第
9図は連続用紙に非定着領域を設けた例を示す斜視図で
ある。 1……連続用紙 2……第一のトラクタ 3……第二のトラクタ 4……ガイド部材 K……転写部 T……定着器 5,6……ローラ M……検出手段 C……制御手段 S……接離手段 7……レバー 8……軸 9……ローラ 10……カム 11……ばね sl……ミシン目 FA1,FA2,F1,F2……定着領域 NFA……非定着領域
FIG. 1 is a schematic sectional view of an embodiment of the present invention, FIG. 2 is a side view showing an example of the structure of the contacting / separating means, FIG. 3 is a side view showing the operating state of the contacting / separating means, and FIG. Is a block diagram showing the electrical configuration of the control means, FIG. 5 is a perspective view showing an example in which a non-fixing area is provided on continuous paper, and FIG. 6 is a perspective view showing an example in which wrinkles have occurred in the non-fixing area. FIG. 7 is a perspective view showing the positional relationship between the fixing area and the non-fixing area, and FIGS. 7A and 7B show examples in which the positions of the non-fixing areas are changed. 8th
FIG. 9 is a perspective view showing a positional relationship between a fixing area and perforations, and FIG. 9 is a perspective view showing an example in which a non-fixing area is provided on continuous paper. 1 ... Continuous paper 2 ... First tractor 3 ... Second tractor 4 ... Guide member K ... Transfer section T ... Fixer 5,6 ... Roller M ... Detecting means C ... Control means S ... Contact / separation means 7 ... Lever 8 ... Shaft 9 ... Roller 10 ... Cam 11 ... Spring sl ... Perforations FA1, FA2, F1, F2 ... Fixing area NFA ... Non-fixing area

───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 広 岩手県花巻市城内4番3号 株式会社新 興製作所内 (72)発明者 斉藤 雅樹 岩手県花巻市城内4番3号 株式会社新 興製作所内 (72)発明者 熊谷 哲 岩手県花巻市城内4番3号 株式会社新 興製作所内 (56)参考文献 特開 昭62−123487(JP,A) 特開 昭62−168183(JP,A) 特開 昭63−249157(JP,A) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Sato 4-3 Castle, Hanai, Hanamaki, Iwate Prefecture Shinko Manufacturing Co., Ltd. (72) Inventor Masaki Saito, 4-3 Castle, Hanamaki, Iwate Shinko Manufacturing Co., Ltd. (72) Inventor Satoshi Kumagai 4-3 Jonai, Hanamaki-shi, Iwate Inside Shinko Seisakusho Co., Ltd. (56) References JP-A-62-123487 (JP, A) JP-A-62-168183 (JP, A) JP 63-249157 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】感光ドラムと定着器との間にトラクタを備
え、前記トラクタでミシン目等の折り目を有する連続用
紙を搬送する電子写真式プリンタ装置において、 搬送される前記連続用紙の折り目及びその折り目の折れ
方向を検出する検出手段と、 前記定着器のローラを圧接させたり、離間させたりする
接離手段と、 前記検出手段の検出動作に基づいて、前記連続用紙の印
字領域の位置を検知するとともに、前記接離手段を駆動
する制御手段とを有し、 前記制御手段は、前記検出手段が折り目の山折り及び谷
折りの一方を検出したときに、その折り目の直前の頁の
印字領域のほぼ終端からその折り目まで前記接離手段に
より前記定着器のローラを離間させ、かつ、前記検出手
段が折り目の山折り及び谷折りの他方を検出したとき
に、その折り目の直前の頁の印字領域のほぼ終端からそ
の折り目を越え次頁の印字領域のほぼ始端まで前記接離
手段により前記定着器のローラを離間させること、 を特徴とする電子写真式プリンタ装置。
1. An electrophotographic printer apparatus, comprising: a tractor between a photosensitive drum and a fixing device, wherein a tractor is used to convey continuous paper having folds such as perforations. Detecting means for detecting the folding direction of the fold, contacting / separating means for pressing or separating the roller of the fixing device, and detecting the position of the print area of the continuous paper based on the detecting operation of the detecting means. And a control means for driving the contacting / separating means, the control means, when the detecting means detects one of the fold and the valley fold of the fold, the print area of the page immediately before the fold When the roller of the fixing device is separated by the contacting / separating means from almost the end to the fold and the detecting means detects the other of the mountain fold and the valley fold, the fold An electrophotographic printer device, characterized in that the roller of the fixing device is separated by the contacting / separating means from substantially the end of the print area of the page immediately before the eye to the beginning of the print area of the next page beyond the fold.
JP2093207A 1989-07-18 1990-04-10 Electrophotographic printer Expired - Lifetime JP2548619B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP18627689 1989-07-18
JP1-186276 1989-07-18

Publications (2)

Publication Number Publication Date
JPH03129374A JPH03129374A (en) 1991-06-03
JP2548619B2 true JP2548619B2 (en) 1996-10-30

Family

ID=16185464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2093207A Expired - Lifetime JP2548619B2 (en) 1989-07-18 1990-04-10 Electrophotographic printer

Country Status (1)

Country Link
JP (1) JP2548619B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004029943B4 (en) 2004-06-21 2006-04-27 OCé PRINTING SYSTEMS GMBH Printer or copier for printing on an endless carrier material with transverse folds and method for controlling such a printer or copier
KR20120089680A (en) 2009-10-19 2012-08-13 테이진 카세이 가부시키가이샤 Aromatic polycarbonate resin composition
CA2911006C (en) 2010-07-16 2018-08-14 Roger R. Adams Wearable device
JP5741645B2 (en) * 2013-08-09 2015-07-01 富士ゼロックス株式会社 Image processing apparatus, image forming apparatus, and image processing program

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62168183A (en) * 1986-01-20 1987-07-24 Fujitsu Ltd Print fixing mechanism
JPH01279279A (en) * 1988-05-02 1989-11-09 Shinko Seisakusho Co Ltd Heat-roller fixing device
JPH02215643A (en) * 1989-02-15 1990-08-28 Nec Corp Fixing apparatus of continuous paper electrophotography device

Also Published As

Publication number Publication date
JPH03129374A (en) 1991-06-03

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