JPS59108644A - Double-feed detecting system for sheet rotary press - Google Patents
Double-feed detecting system for sheet rotary pressInfo
- Publication number
- JPS59108644A JPS59108644A JP57214994A JP21499482A JPS59108644A JP S59108644 A JPS59108644 A JP S59108644A JP 57214994 A JP57214994 A JP 57214994A JP 21499482 A JP21499482 A JP 21499482A JP S59108644 A JPS59108644 A JP S59108644A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- value
- light quantity
- transmittable
- sheet
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
- B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation
- B65H7/125—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation sensing the double feed or separation without contacting the articles
Landscapes
- Controlling Sheets Or Webs (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、枚葉輪転印刷機において、2枚以上の用紙が
同時に供給されたことの検出に用いられる2枚差検出方
式に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-sheet difference detection method used in a sheet-fed rotary printing press to detect that two or more sheets are fed simultaneously.
枚葉輪転印刷機においては、2枚以上の用紙が同時に供
給される2枚差を生じた場合、これを検出して印刷機の
運転を停止させるものとなっており、従来は、第1図乃
至第3図に原理を示す手段が一般的に採用されていた。In a sheet-fed rotary printing press, if two or more sheets of paper are fed at the same time and a two-sheet discrepancy occurs, this is detected and the operation of the printing press is stopped. The means whose principles are shown in FIGS. 3 to 3 have generally been adopted.
すなわち、第1図乃至第3図は、用紙の光線透過率αと
透過光の光量りとの関係を示しており、用紙が1枚の場
合は、直線AのとおfiD=αの関係となるのに対し、
用紙が2枚の場合は、曲線BのとおシD=α2の関係と
なるだめ、光量りの変化に着目し、これの値に応じて2
枚差の検出を行なうものとなっている。That is, Figures 1 to 3 show the relationship between the light transmittance α of paper and the amount of transmitted light, and when there is only one sheet of paper, the relationship of fiD = α with straight line A is established. In contrast,
If there are two sheets of paper, the relationship between the direction of curve B and D = α2 will be established. Focusing on the change in the amount of light, 2 will be calculated according to this value.
It is designed to detect the sheet difference.
たソし、第1図においては、用紙の厚さおよび質に応じ
て半固定的に設定される検知レベルLdを基準としてお
シ、これに基づいて2枚差の検出を行なっているため、
検知可能範囲DEがわずかであると共に、用紙の種類を
変更すれば、その都度検知レベルLdを調整しなければ
ならないうえ、経時的な条件変化に対応できない等の欠
点を生じている。However, in Fig. 1, the detection level Ld, which is semi-fixed according to the thickness and quality of the paper, is used as a reference, and the difference between two sheets is detected based on this.
The detectable range DE is small, the detection level Ld must be adjusted each time the type of paper is changed, and it is not possible to respond to changes in conditions over time.
また、第2図においては、前回までの透過光量に対し平
均化等の処理を行ない、これの結果を記憶のうえ検知レ
ベルLdを設定しておシ、第1図と比較すれば検知可能
範囲DEは大であるが、透過率αの100チに近い範囲
および0%に近い範囲に対しては、2枚差の検出が不可
能となる欠点を生じている。In addition, in Fig. 2, processing such as averaging is performed on the amount of transmitted light up to the previous time, and after memorizing the result, the detection level Ld is set. Although the DE is large, it has a drawback that it is impossible to detect the difference between two sheets in a range of transmittance α close to 100 degrees and a range close to 0%.
なお、第3図においては、前述と同様に記憶した値に対
して一定の比率によυ検知レベルLdヲ設定しておシ、
第2図よシも検知可能範囲DEが拡大されてはいるもの
\、なお、透過率αの100チに近い範囲では、2枚差
の検出が不可能となる欠点を生じている。In addition, in FIG. 3, the υ detection level Ld is set at a constant ratio to the stored value in the same way as described above.
Although the detectable range DE is expanded in FIG. 2, there is a drawback that it is impossible to detect the difference between two sheets in a range where the transmittance α is close to 100 degrees.
本発明は、従来のか\る欠点を根本的に排除する目的を
有し、1枚の用紙を透過した透過光の光量と2枚の用紙
を透過した透過光の光量とのほぼ中間の値を示す基準値
を定めたうえ、この基準値と1枚の用紙を透過した透過
光の光量との差を示す減算値を定め、この減算値を用紙
を透過した透過光の光量から減算して実際の基準値を求
めてから、この基準値と現在の用紙を透過した透過光の
光量とを比較し、この結果に基づいて用紙の2枚差を検
出するものとした極めて効果的な、枚葉輪転印刷機の2
枚差検出方式を提供するものである。The present invention has the purpose of fundamentally eliminating the drawbacks of the conventional methods, and aims to reduce the amount of transmitted light that passes through one sheet of paper to a value that is approximately intermediate between the amount of transmitted light that passes through two sheets of paper. In addition to determining a reference value to indicate the amount of light transmitted through one sheet of paper, a subtraction value is determined to indicate the difference between this reference value and the amount of transmitted light transmitted through one sheet of paper, and this subtraction value is subtracted from the amount of transmitted light transmitted through the paper to calculate the actual value. This extremely effective sheet-feed system calculates the reference value of Rotary printing press 2
This provides a sheet difference detection method.
以下、実施例を示す図によって本発明の詳細な説明する
が、壕ず、本発明の詳細な説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to figures showing embodiments, but the present invention will be described in detail without further ado.
第4図は、第1図乃至第3図と同様の図であるが、1枚
の用紙を透過した透過光の光iI〕を示す直線Aと、2
枚の用紙を透過した透過光の光量りを示す曲線Bとの中
間の値、D−α−トで−を示す曲線上に基準値Mnを定
めたうえ、直線Aの値と基準値Mnとの差を示す減算値
しnを定めており、実際の用紙を透過した透過光の光量
Dnから減算値Lnを減算して実際の基準値Mnを求め
、これを検知レベルLdとして用いるものとなっている
。Fig. 4 is a diagram similar to Figs.
The reference value Mn is set on the curve showing D-α-t, which is an intermediate value between the curve B showing the amount of transmitted light transmitted through a sheet of paper, and the value of the straight line A and the reference value Mn are A subtraction value n is determined that indicates the difference between ing.
しだがって、光MDに応じて減算値Lnを設定しておき
、Dn−Ln−=Mnの演算によシ、逐次基準値Mnを
求め、これと現在の用紙を透過した透過光の光量Dn+
1とを比較し、Mr+≧Dn→1 の条件となったこと
を判断すれば検知可能範囲DEが透過率αのほぼO%〜
100チまで拡大される。Therefore, the subtraction value Ln is set according to the light MD, and the reference value Mn is successively determined by calculating Dn-Ln-=Mn, and this and the amount of light transmitted through the current paper are calculated. Dn+
1, and if it is determined that the condition Mr+≧Dn→1 has been met, the detectable range DE is approximately 0% of the transmittance α.
Expanded to 100 inches.
たソし、点線によp示すとおり、透過率αの範囲に応じ
て基準値Mnを直線によシ近似するものとしてもほぼ同
様の結果が得られる。However, as shown by the dotted line p, almost the same result can be obtained even if the reference value Mn is approximated by a straight line depending on the range of the transmittance α.
また、第5図に透過率αの低い範囲を拡大して示すとお
り、透過率αの低い用紙では、2枚差の場合、用紙相互
間の間隙における光線反射により、理論値による曲線B
よシも実測値による曲線Brが低い値を示すため、透過
率αの低い用紙では、基準値MnをMnrへ変更し、こ
れに応じて減算値Lnを定めることが好ましい。In addition, as shown in Fig. 5, which shows an enlarged range of low transmittance α, for paper with low transmittance α, when there is a difference between two sheets, the curve B based on the theoretical value is
Since the curve Br based on the actually measured values shows a low value, it is preferable to change the reference value Mn to Mnr and set the subtraction value Ln accordingly for paper with a low transmittance α.
なお、同図において、Ad 、 Mnd 、 Bd等は
、ディジタル変換により量子化した場合の変化状況を示
している。In addition, in the figure, Ad, Mnd, Bd, etc. indicate changes when quantized by digital conversion.
第6図以降は、以上の原理に基づ〈実施例を示し、第6
図仁1、機械的構成図であり、給紙台1から送出された
用紙2は差板3上へ給送され、スイング爪4により頭部
が捕捉されてゴム胴5と圧胴6との間へ供給されたうえ
、版胴7からゴム胴5へ転写された絵柄の印刷を受ける
ものとなっているが、差板3の先端部近傍には透孔3a
が穿設されており、差板3の下面側に設けた投光器LG
の発光が用紙2を透過し、受光器LRにより受光され、
電気信号へ変換されるものとなっている。From FIG. 6 onwards, examples will be shown based on the above principle.
Fig. 1 is a mechanical configuration diagram, in which the paper 2 sent out from the paper feed table 1 is fed onto the difference plate 3, the head is captured by the swing claw 4, and the paper is moved between the blanket cylinder 5 and the impression cylinder 6. In addition to being supplied to the blanket cylinder 5, the plate cylinder 7 receives the printing of the image transferred from the plate cylinder 7 to the blanket cylinder 5.
is perforated, and a floodlight LG is provided on the bottom side of the difference plate 3.
The emitted light passes through the paper 2 and is received by the light receiver LR,
It is converted into an electrical signal.
また、圧胴6には図上省略した突起等の駆動体が設けて
あり、これと対設した近接スイッチ等の検出器TDによ
シ圧胴6の回転を検出し、印刷機の回転と同期したパル
ス信号を得ている。Further, the impression cylinder 6 is provided with a driving body such as a protrusion not shown in the figure, and the rotation of the impression cylinder 6 is detected by a detector TD such as a proximity switch installed opposite to this, and the rotation of the printing press is detected. A synchronized pulse signal is obtained.
第7図は、電気的構成を示すブロック図であシ、光源用
電源LPSによシ投光器LGt点灯する一方、受光器L
Rの出力は処理部PR8へ与えられており、透過光の光
量を示すディジタル信号へ変換されたうえ、デコーダ等
を用いた選択器SEL、比較器cp、減算器等を用いた
演算器OP、および、メモリ等を用いた減算値発生器S
NGへ与えられる。Fig. 7 is a block diagram showing the electrical configuration.
The output of R is given to a processing unit PR8, where it is converted into a digital signal indicating the amount of transmitted light, and is also processed by a selector SEL using a decoder etc., a comparator CP, an arithmetic unit OP using a subtracter etc. And a subtraction value generator S using memory etc.
Given to NG.
1だ、演算器OPは、処理部PR8の出力から減算値発
生器SNGの出力を減算し、減算結果をラッチ回路等の
記憶器MMへ与えておシ、これの記憶出力は比較器CP
へ与えられ、処理部PR8の出力と比較されたうえ、比
較出力がANDゲート等の出力回路OCを介し、2枚差
の検出出力Doとして送出されるものとなっている。1, the arithmetic unit OP subtracts the output of the subtraction value generator SNG from the output of the processing unit PR8, and gives the subtraction result to a memory unit MM such as a latch circuit, and the memory output of this is sent to the comparator CP.
It is compared with the output of the processing unit PR8, and the comparison output is sent out as the detection output Do of the difference between the two sheets via an output circuit OC such as an AND gate.
なお、選択器SELは、処理部PR8の出力が所定範囲
外となったときに出力を生じ、これがORゲート等の記
憶制御器MCを介して記憶器MMへ与えられ、記憶器M
Mによる演算器opの出力の記憶動作を阻止すると共に
、比較器cpの比較出力も記憶制御器MCを介して記憶
器MMへ与えられ、同様に記憶動作を阻止するものとな
っている。Note that the selector SEL generates an output when the output of the processing unit PR8 is outside a predetermined range, and this output is given to the memory unit MM via a memory controller MC such as an OR gate.
In addition to blocking the storage operation of the output of the arithmetic unit OP by M, the comparison output of the comparator cp is also given to the storage device MM via the storage controller MC, thereby preventing the storage operation in the same way.
一方、シュミット・トリガ回路等を用いた紙検出回路P
Dにも受光器LRの出力が与えられており、この出力が
所定レベル以下となったときに紙検出回路PDが出力を
生じ、これを出力回路OCへ与えると共に、検出器TD
の出力と同期してタイミング信号発生器TSGが発生し
たタイミング信号も出力回路OCへ与えられており、両
者の一致により出力回路OCがオンとなり、比較器cp
の比較出力を送出するものとなっている。On the other hand, a paper detection circuit P using a Schmitt trigger circuit etc.
The output of the light receiver LR is also given to D, and when this output becomes below a predetermined level, the paper detection circuit PD generates an output, which is given to the output circuit OC, and the output is sent to the detector TD.
The timing signal generated by the timing signal generator TSG in synchronization with the output of cp is also given to the output circuit OC, and when the two match, the output circuit OC is turned on, and the comparator cp
The comparison output is sent out.
ただし、タイミング信号発生器TSGは、各種のり・イ
ミング信号を発生し、これらを処理部PR8、減算値発
生器SNG、記憶器MM等にも与えておシ、これによっ
て各部の動作タイミングを規正しているO
このほか、用紙2の種類に応じて操作される切替スイッ
チSWが設けてあシ、光源囲電源LPSを制御し、光源
LGの発光光度を可変すると共に、選択器SELおよび
減算値発生器SNGを制御し、選択器SELによシ監視
される処理部PR8の出力における所定範囲、および、
減算値発生器SNGの出力により示される減算値Lnの
範囲を可変している。However, the timing signal generator TSG generates various glue/timing signals and supplies these to the processing unit PR8, the subtraction value generator SNG, the memory MM, etc., and thereby regulates the operation timing of each part. In addition, a changeover switch SW is provided that is operated according to the type of paper 2, and controls the light source surrounding power supply LPS to vary the luminous intensity of the light source LG, as well as a selector SEL and a subtraction value generator. a predetermined range in the output of the processing unit PR8, which controls the selector SNG and is monitored by the selector SEL;
The range of the subtraction value Ln indicated by the output of the subtraction value generator SNG is varied.
第8図は、処理部PR8の詳細を示すブロック図であり
、受光器LRの出力は、戸波器FILにょシ雑音成分が
除去されてから、増幅器AMPにょυ所定レベルまで増
幅され、積分回路等を用いた平均化回路AVRによシ平
均化されたうえ、アナログ・ディジタル変換器(以下、
ADC)A/Dに」:9、タイミング信号発生器rsG
>)・らのタイミング信号に応じてディジタル信号へ変
換されるものとなっている。FIG. 8 is a block diagram showing the details of the processing unit PR8, in which the output of the photoreceiver LR is amplified to a predetermined level by the amplifier AMP after noise components are removed by the transducer FIL, and the output from the receiver LR is amplified to a predetermined level by the amplifier AMP. It is averaged by an averaging circuit AVR using an analog-to-digital converter (hereinafter referred to as
ADC) A/D": 9, timing signal generator rsG
>) and are converted into digital signals in accordance with the timing signals.
第9図は、ADC−A/Dの動作と減算値発生器SNG
のルb作との関係を示すタイミングチャートであシ、タ
イミング信号(alがn回目およびn+1回目と与えら
れるのに応じ、ADO−A/D の変換動作(b)が反
復して行なわれ、これと対応して減算値LnおよびLn
+1の発生(e)が反復して行なわれる。Figure 9 shows the operation of ADC-A/D and the subtraction value generator SNG.
This is a timing chart showing the relationship between the ADO-A/D conversion operation (b) and the timing signal (al) being applied for the nth and (n+1)th time. Correspondingly, the subtraction values Ln and Ln
The generation of +1 (e) is repeated.
なお、減算値の発生は、メモリの各アドレスへ光量りに
応じた減算値を格納しておき、切替スイッチSWにより
アドレス番号の上位ビットを指定して減算値の範囲を定
めると共に、ADC−A/Dの出力によりアドレス番号
の下位ビットを指定して格納内容を読み出す等の手段に
より行なわれる。To generate the subtraction value, store the subtraction value corresponding to the light intensity in each address of the memory, specify the high-order bit of the address number with the changeover switch SW to determine the range of the subtraction value, and then use the ADC-A. This is done by specifying the lower bits of the address number by outputting /D and reading out the stored contents.
第10図は、第7図の動作状況を示すフローチャートで
あシ、紙検出回路PDによる“紙布シ?“の判断、およ
び、タイミング信号によシ示されるゞ検出タイミゾグア
“の判断がY(YES)となれば、′出力回路ON’
が行なわれたうえ、″’ADC動作′に動作用紙2を透
過した透過光の光量pnが処理部PR8から送出され、
用紙2がゝ1枚目?′のYであれば、減算値発生器SN
Gから1減算値発生“がなされ、演算器opへ光量Dn
と減算値Lnとが与えられるため、ここにおいてDn−
Lnの1演算“が行なわれると共に、選択器SELによ
り光量Dnが所定範囲か否かの判断が行なわれ、所定範
囲内であれば1記憶可?′がYとなシ、演算器OPの出
力によって示される基準値Mnが記憶器MMによシゞ記
憶“される。FIG. 10 is a flowchart showing the operating status of FIG. YES), 'output circuit ON'
is carried out, and the amount pn of the transmitted light transmitted through the operation paper 2 is sent out from the processing unit PR8 for "ADC operation".
Is paper 2 the first sheet? ', then the subtraction value generator SN
1 subtraction value is generated from G, and the light amount Dn is sent to the arithmetic unit OP.
and the subtraction value Ln are given, so here Dn-
1 calculation of Ln is performed, and the selector SEL determines whether the light amount Dn is within a predetermined range. The reference value Mn indicated by is stored in the memory MM.
また、用紙2が2枚目以降であれば、′1枚目?“がN
(No)となシ、前述と同様に2減算値発生“がなされ
、このときには、演算器OPへ光量Dn−) 1と減算
値Ln+1とが与えられるだめ、演算器opからは基準
値Mn+1を示す出力が生じ、ゞMn≧Dn+1“、’
Do送出“およびゞ記憶可?“のYを経た後のゞ記憶
“により、記憶器MMの内容が更新されたうえ記憶され
る。Also, if paper 2 is the second or subsequent sheet, is it '1st sheet? " is N
If (No), a 2-subtraction value is generated in the same way as described above, and at this time, since the light amount Dn-) 1 and the subtraction value Ln+1 are given to the arithmetic unit OP, the reference value Mn+1 is given from the arithmetic unit OP. The output shown is generated, ゞMn≧Dn+1'','
The contents of the memory device MM are updated and stored by "Storage" after passing through "Do sending" and "Y of "Storage possible?".
たゾし、これに先立ち、光量1)n+1と記憶器MMの
内容により示される基準値Mnとが比較器CPへ与えら
れるため、ゞMn≧pn+1“ の比較がなされ、これ
の結果がYであれば、オン状態の出力回路OCを介し、
検出出力″DO送出′ を行なう。However, prior to this, the light amount 1)n+1 and the reference value Mn indicated by the contents of the memory MM are given to the comparator CP, so a comparison is made that ゞMn≧pn+1'', and the result of this is Y. If so, through the output circuit OC in the on state,
Detection output ``DO transmission'' is performed.
なお、′記憶可?” の判断には、比較器CPの比較出
力も関与(〜でおり、’Mn≧Dn+1“ の条件が成
立して比較出力が生ずhは、′記憶用?“がNとなる。Furthermore, can you remember? The comparison output of the comparator CP is also involved in the determination of ``.
丑ブζ−15紙有り?“およびゞ検出タイミング?“の
Nで(ζ」1、ゞ出力回路OFF“が行なわれ、不要な
信号の送出が阻止されるものとなっている。Ushibu ζ-15 paper available? At N of "and detection timing?", (ζ) is 1, "output circuit OFF" is performed, and transmission of unnecessary signals is prevented.
Lまたがって、以上の動作を反復することにより、用紙
2をdiMI〜た透過光の光(iDに応じ、て自動的に
炸次最適な基準値Mnが定められ、これに基づいて現在
の光セ1)が2枚差を示すか否かの判断が行なわ′tす
るものとなり、第4図に示す結果が実現する。By repeating the above operation across L, the optimal reference value Mn is automatically determined according to the light transmitted through the paper 2 from diMI to iD, and the current light is determined based on this. A judgment is made as to whether or not 1) indicates a two-sheet difference, and the result shown in FIG. 4 is realized.
たマl〜、検出器TDとしてロー タリエンコーダ等を
用いてもよく、第7図の減算値発生器SNG。Alternatively, a rotary encoder or the like may be used as the detector TD, and the subtraction value generator SNG in FIG.
演算器op、記憶器MM、比較器cp、マシ択器SEL
、記憶制御器へ4C等し12、マイクロプロセッサおよ
びメモリ等−\↑N換してもよく、アナログ回路により
第7図と同等の機能を実現することも任意であり、本発
明は神々の変形が自在である。Arithmetic unit op, memory unit MM, comparator cp, selector SEL
, 4C equal to 12, microprocessor, memory, etc. to the storage controller -\↑N may be replaced, and it is also optional to realize the function equivalent to that in Fig. 7 with an analog circuit, and the present invention is a divine modification. is free.
以上の説明により明らかなとおり本発明によれば、自動
的に最適な基準値が定められるため、用紙の光線透過率
変化によるhl、および、経時的な諸条件の変化による
彰磨が排除され、常に確実な2枚差の検出が行なわれる
ものとなり、各種の枚葉輪転印刷機において顕著な効果
が得られる。As is clear from the above explanation, according to the present invention, the optimal reference value is automatically determined, so that hl due to changes in light transmittance of paper and change due to changes in various conditions over time are eliminated. The difference between two sheets can always be detected reliably, and a remarkable effect can be obtained in various sheet-fed rotary printing presses.
第1図乃至第3図は従来例の原理を示す図、第4図およ
び第5図は本発明の原理を示す図、第6図以降は本発明
の実施例を示し、第6図は機械的構成図、第7図は電気
的構成を示すブロック図、第8図は処理部の詳細を示す
ブロック図、第9図はADCの動作と減算値発生器の動
作との関係を示すタイミングチャー ト、第1o図は第
7図の動作状況を示すフローチャートである。
2・・・・用紙、3a・・・・透孔、LG・・・°投光
器、LR・・・・受光器、PR8・・・・処理部、SN
G・・・・減算値発生器、op ・・・・演算器、M
M・・・・記憶器、cp・・。
・比較器、A/D・・・・ADC(アプゴゴグ・ディジ
タル変換器)。
第1図
□べI%J
第2図
→O/[%]
第3図
→べ〔%J
第412′1Figures 1 to 3 are diagrams showing the principle of the conventional example, Figures 4 and 5 are diagrams showing the principle of the present invention, Figures 6 and after show examples of the present invention, and Figure 6 is a machine 7 is a block diagram showing the electrical configuration, FIG. 8 is a block diagram showing details of the processing section, and FIG. 9 is a timing chart showing the relationship between the operation of the ADC and the operation of the subtraction value generator. FIG. 1o is a flowchart showing the operating status of FIG. 2...Paper, 3a...Through hole, LG...° Emitter, LR...Receiver, PR8...Processing unit, SN
G: Subtraction value generator, op: Arithmetic unit, M
M...Memory device, CP...・Comparator, A/D...ADC (appogog digital converter). Figure 1 □ Be I%J Figure 2 → O/[%] Figure 3 → Be [%J 412'1
Claims (1)
した透過光の光量とのはソウ間の値を示す基準値と前記
1枚の用紙を透過した透過光の光量との差を示す減算値
を定め、該減算値を前記用紙を透過した透過光の光量か
ら減算して実際の基準値を求め、誘基準値と現在の用紙
を透過した透過光の光量とを比較して前記用紙の2枚差
を検出することを特徴とした枚葉輪転印刷機の2枚差検
出方式。The amount of transmitted light transmitted through one sheet of paper and the amount of transmitted light transmitted through two sheets of paper are the difference between the reference value indicating the value between the values and the amount of transmitted light transmitted through one sheet of paper. Determine a subtraction value that indicates the value, subtract the subtraction value from the amount of transmitted light that has passed through the paper to obtain the actual reference value, and compare the induced reference value with the current amount of transmitted light that has passed through the paper. A two-sheet difference detection method for a sheet-fed rotary printing press, characterized in that a difference between two sheets of paper is detected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57214994A JPS59108644A (en) | 1982-12-08 | 1982-12-08 | Double-feed detecting system for sheet rotary press |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57214994A JPS59108644A (en) | 1982-12-08 | 1982-12-08 | Double-feed detecting system for sheet rotary press |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59108644A true JPS59108644A (en) | 1984-06-23 |
JPH022773B2 JPH022773B2 (en) | 1990-01-19 |
Family
ID=16664936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57214994A Granted JPS59108644A (en) | 1982-12-08 | 1982-12-08 | Double-feed detecting system for sheet rotary press |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59108644A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62156958A (en) * | 1985-12-28 | 1987-07-11 | Hamada Insatsuki Seizosho:Kk | Two-piece insertion detector for printer |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5842091A (en) * | 1981-09-07 | 1983-03-11 | 株式会社三陽電機製作所 | Display in vehicle |
-
1982
- 1982-12-08 JP JP57214994A patent/JPS59108644A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5842091A (en) * | 1981-09-07 | 1983-03-11 | 株式会社三陽電機製作所 | Display in vehicle |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62156958A (en) * | 1985-12-28 | 1987-07-11 | Hamada Insatsuki Seizosho:Kk | Two-piece insertion detector for printer |
Also Published As
Publication number | Publication date |
---|---|
JPH022773B2 (en) | 1990-01-19 |
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