EP0589789B1 - Vorrichtung zum Entstapeln von flachen Gegenständen mit Vorrichtung zum Ausrichten der Vorderkante - Google Patents

Vorrichtung zum Entstapeln von flachen Gegenständen mit Vorrichtung zum Ausrichten der Vorderkante Download PDF

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Publication number
EP0589789B1
EP0589789B1 EP93402319A EP93402319A EP0589789B1 EP 0589789 B1 EP0589789 B1 EP 0589789B1 EP 93402319 A EP93402319 A EP 93402319A EP 93402319 A EP93402319 A EP 93402319A EP 0589789 B1 EP0589789 B1 EP 0589789B1
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EP
European Patent Office
Prior art keywords
cycle
control means
sensor
suction
item
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
EP93402319A
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English (en)
French (fr)
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EP0589789A1 (de
Inventor
Louis Sabatier
Franck Walpole
Olivier Roch
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Solystic SAS
Original Assignee
Compagnie Generale dAutomatisme CGA HBS SA
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Publication of EP0589789A1 publication Critical patent/EP0589789A1/de
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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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/12—Suction bands, belts, or tables moving relatively to the pile
    • B65H3/124—Suction bands or belts
    • 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
    • B65H7/16—Controlling air-supply to pneumatic separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B65H2406/322—Suction distributing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/34—Pressure, e.g. fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1916—Envelopes and articles of mail

Definitions

  • the invention relates to a device for unstacking flat articles, such as closed or open mail folds.
  • This type of device is in particular used in automatic mail sorting machines or the like.
  • US Pat. No. 4,357,007 discloses a device for unstacking flat articles including first and second suction nozzles arranged on one side of a jogging edge, a perforated endless band running continuously in front of the nozzles. suction and the free face of the first article of a stack of articles, a passage forming an outlet between the jogging edge and the strip, a first and a second sensor arranged on the other side of the jogging edge.
  • the second suction nozzle is spaced downstream of the first suction nozzle in the direction of travel of the endless belt and the second sensor is spaced downstream of the first sensor in the direction of travel of this belt.
  • the second sensor operates the first or second suction nozzle depending on whether the first sensor is in the condition of detecting or not detecting an article, respectively.
  • This known device makes it possible to single out articles taken from a pile of articles in order to distribute them one by one towards the outlet even when, in a pile of articles on edge abutting against a jogging edge, some of the articles have a defect in 'alignment.
  • a problem encountered in article unstacking devices is that two consecutive articles in a stack of articles to be singled out are not always arranged with their edge leading into contact with the jogging edge, which leads to errors in operation of the unstacking device. Indeed, when for example a first article of the stack has an edge leading back from the jogging edge and beyond the trailing edge of a suction nozzle and a second article has its edge leading into contact with the jogging edge, the second article, and not the first article, is first taken by the suction nozzle when activated and is conveyed to the outlet by the endless belt before the first article. If the first article in the stack is not moved towards the jogging edge, it will never be unstacked.
  • a control means for selectively actuating the suction nozzles in response to the signals supplied by the sensors.
  • the tolerated misalignment between the leading edges of the articles is equal to the distance between the trailing edge of the first suction nozzle and the plane of the jogging edge.
  • the maximum distance between the trailing edge of the first suction nozzle and the first sensor is equal to the size of the smallest item in the stack. Because the sensors and the suction nozzles are disposed respectively on either side of the jogging edge, it follows that the maximum tolerable misalignment is less than the dimension of the smallest article in the stack. Then, in normal operation, that is to say when no item of the stack is cracked back, the control means simultaneously actuates the first then the second suction nozzle.
  • an item with a backward crack will be designated an article which has its edge leading back from the jogging edge beyond the trailing edge of the second suction nozzle.
  • the term re-tapping will mean the action of bringing the leading edge of a tackled article against the tapping edge.
  • the object of the invention is to remedy these drawbacks by proposing in particular an unstacking device which tolerates rear stripping larger than the dimension of the smallest article in a stack of articles.
  • the subject of the invention is a device for unstacking flat articles as defined in claim 1.
  • the maximum tolerable distance between the trailing edge of the second gripping means and the sensor is equal to the dimension of the smallest article in the stack. Furthermore, the maximum tolerable distance between the trailing edge of the first gripping means and the leading edge of the second gripping means is equal to the smallest dimension of an article in the stack.
  • the gripping means and the sensor being arranged on either side of the jogging edge, therefore the maximum tolerable rear impact is equal to the distance between the trailing edge of the first gripping means and the jogging edge. This distance can therefore be greater than the dimension of the smallest item in the stack.
  • the first gripping means is actuated only in the case where a rear tackle is detected by the control means which guarantees, in the absence of tackled articles back in the stack, an optimal unstacking rate.
  • the control means controls a timer which is triggered simultaneously with the actuation of the second gripping means by the control means during the unstacking cycle and which is stopped on detection of the presence of an article by the sensor, and is arranged to initiate the re-tracking cycle if said timer has not been stopped before the expiration of a set time.
  • This timer can be set for more than one set point so that you can detect backstroke items with different characteristics.
  • Such a timer is easy to realize in the form of a program loaded in a microcomputer and the control means can also consist of a program loaded in this microcomputer.
  • the unstacking device comprises a vacuum sensor which monitors the vacuum level prevailing in a vacuum tank connected to the gripping means constituted by suction nozzles.
  • the vacuum sensor provides a rear tackle detection signal to the control means when the detected vacuum level is lower than a set vacuum level.
  • the unstacking device comprises a low vacuum chamber disposed between the two gripping means whose function is to attract the first article of the stack close to the endless belt which allows to increase the rate of unstacking items from the stack.
  • FIG. 1A schematically represents a top view of the unstacking device.
  • FIG. 1B is a block diagram of the control circuit of the device.
  • Figure 2 is a flow diagram illustrating a depilation cycle.
  • FIG. 3 is a flow diagram illustrating a pickling detection cycle.
  • Figure 4 is a flowchart illustrating a re-tapping cycle.
  • the device includes an input stage 1 for receiving a stack of folds 2 on edge abutting against a jogging edge 3.
  • the stack is brought against the jogging edge 3 by a path d substantially horizontal or inclined feed formed by conveyor belts 4.
  • three folds are shown such as L1, L2, L3.
  • the fold L1 is tacked back, its leading edge not being in contact with the jogging edge 3.
  • This stage comprises an endless strip 6 perforated continuously scrolling in front of the free face of the first ply of the stack in the direction designated by the arrow D. This strip is guided and driven by pulleys and defines with the jogging edge 3 an outlet for folds.
  • the unstacking stage also includes a first suction nozzle 7 and a second suction nozzle 8 mounted along the endless strip facing the top of the stack, the endless strip running between the nozzles suction and the folds of the stack 2.
  • the suction nozzles 7,8 have their outputs connected to a vacuum tank 9 via solenoid valves not shown.
  • the vacuum tank is connected to a depressor not shown which maintains a permanent vacuum in the tank of the order of 300mbars below atmospheric pressure.
  • the suction nozzles are actuated selectively by means of their respective solenoid valves by a microcomputer 10 to take an article from the pile and hold it against the endless strip and therefore to separate it from the pile of plies to be singled out.
  • the unstacking stage 5 also includes a low vacuum chamber 11 disposed between the two suction nozzles and acting permanently to keep the first fold of the stack close to or in contact with the endless belt.
  • the endless belt 6 has a path which frees up a space between the two nozzles 7,8 to allow the vacuum chamber to act directly on the folds of the stack.
  • a vacuum sensor 12 is provided inside the vacuum tank 9 to provide the microcomputer 10 with a signal when it detects that the vacuum prevailing inside the vacuum tank is lower or greater than a set value equal for example to 250mbars below atmospheric pressure.
  • the unstacking device also includes a distribution stage 13 disposed on the side of the plane of the jogging edge opposite the support plane of the stack of plies.
  • This stage comprises a suction nozzle 14 connected to the vacuum reservoir 9 which acts on the rear face of a depilated ply presenting itself at the outlet, a singularized ply transfer member constituted by two endless bands 15, 16 guided and driven by pulleys and acting by pinching singularized folds.
  • the role of the nozzle 14 is to prevent double sockets.
  • Sensors 17, 18, 19 are provided in the distribution stage to supply the microcomputer 10 with signals for detecting the presence or absence of a fold at the exit from the unstacking stage. These sensors are conventionally constituted by light diodes and photosensitive cells.
  • the sensor 17 is placed immediately at the exit of the unstacking stage between the strip 6 and the strip 16 and downstream of the jogging edge 3.
  • the sensor 18 is placed downstream of the sensor 17 in the direction of travel of the strip (arrow referenced D) but preferably upstream of the pinch point P.
  • the sensor 19 is placed downstream of the sensor 18 near the pinch point of the bands 15, 16.
  • the cycle begins with an initialization phase 50 in which the nozzles 7,8,14 are deactivated, the strip 6 and the rollers 20 driven and the low vacuum chamber 11 put into action.
  • the microcomputer 10 actuates the nozzle 8 (V1) at 51 to unstack a fold of the stack.
  • the sensor 18 (C1) detects the presence of the fold at 52, it sends a signal to the microcomputer 10 which actuates the nozzle 14 (V2) at 53 after a time delay allowing the fold to reach the pinch point.
  • the maximum distance between the trailing edge of the nozzle V1 and the sensor C2 is equal to the dimension of the smallest fold to be treated by the destacker.
  • This cycle begins from the actuation of the nozzle V1 in step 51.
  • Two alternative detection steps are implemented which begin with the setting of a timer (microcomputer clock) for two delays T1 and T2 , the delay T1 being for example equal to 50 ms and the delay T2 being equal for example to 150ms.
  • the cycle can consist in controlling the time between the instant when the nozzle V1 is actuated and the instant of detection by the sensor C1 of a fold during unstacking. In fact, if a fold such as L1 is cracked, it more or less closes the chamber with permanent low vacuum 11 and prevents the second fold L2 of the stack from pressing against the strip 6.
  • the sensor C1 detects at 61 the presence of the fold, there is no untagged fold and the microcomputer continues the detection cycle with the unstacking cycle at 53.
  • the microcomputer increments a counter at 65.
  • the cycle continues at 53 as long as the value of the counter has not reached at 66 a predetermined count value, for example equal to 3. If the counter has reached this count value in 66, the cycle continues with a re-tapping cycle R.
  • This detection step is intended for thin, folded folds and / or which partially obstruct the chamber 11.
  • This detection step is intended for thick stapled folds and / or which completely obstruct the chamber 11.
  • the pickling detection cycle can also consist in monitoring the vacuum level in the vacuum tank during the actuation of the nozzle V1.
  • the vacuum sensor 12 detects at 63 that the vacuum in the vacuum tank is less than a set vacuum
  • the pickling detection cycle continues with a cycle R, the cycle continues at 61.
  • the vacuum tank fills with air until the ply L1 is pressed against the strip 6. This short time results in a temporary decrease in vacuum in the vacuum tank. If a thick fold is cracked back, it disturbs the operation of the nozzle V1 enough to bring down the vacuum level in the vacuum tank which is detected by the sensor 12.
  • the control of the vacuum level has the advantage of rapid detection of a rear tackle and maintains the order of unstacking the folds.
  • the jogging cycle begins with the deactivation of the nozzle V1 at 70.
  • the microcomputer actuates the nozzle V0 in 72 and triggers in 73 the timer for a TRMAX delay equal for example to 100 ms.
  • the microcomputer 10 then deactivates the nozzle V0 and simultaneously activates the nozzle V1 at 77 if the sensor C0 detects the presence of a fold at 74, or if the depression sensor 12 detects a drop in depression at 75 or if the delay TRMAX has elapsed in 76.
  • the microcomputer triggers the timer again for a TRMAX delay equal for example to 150 ms.
  • the microcomputer continues the unstacking cycle in 53. If the sensor C1 does not detect the presence of a fold in 79 before the expiration of the TRMAX delay or if the sensor 12 detects a drop in vacuum at 80, then the microcomputer deactivates the nozzle V1 and simultaneously actuates the nozzle V0 at 82 then triggers the timer at 83 for a new time TRMAX by example equal to 300ms. At the end of the TRMAX delay in 84, the microcomputer continues the cycle in 77 as before.
  • the microcomputer starts the timer at 83 for a TRMAX delay of 500 ms and then continues the cycle at 77 as before. If again the sensor C1 does not detect a fold at 79, the microcomputer starts the timer at 83 for a TRMAX delay of 500 ms and then continues the cycle at 77 as before. If finally the sensor C1 does not yet detect a fold at 79, the destacker is stopped.
  • the microcomputer checks the value of the counter at 85. If the value of the counter is equal to the predetermined count value (in this case 3), the microcomputer initializes the counter at 86, then continues the cycle with a cycle of unstacking starting at 51 and ending at 57. If at the end of the unstacking cycle, the C0 sensor detects the presence of a fold in 87, the unstacking cycle is resumed from 51 to 57. As soon as the C0 sensor detects the absence of a fold in 87, the re-tracking cycle continues in 72.
  • the predetermined count value in this case 3
  • the microcomputer actuates the nozzle V0 at 88 and triggers the timer in 89 for a TRMAX delay equal for example to 150 ms. If the sensor C1 detects the presence of a fold in 90 or if the sensor 12 detects a drop in depression in 91 or if the TRMAX delay has expired in 92, the microcomputer deactivates the nozzle V0 and actuates the nozzle V1 in 93 The re-tracking cycle then continues with a destacking cycle at 52.
  • the distance between the trailing edge of the nozzle V0 and the sensor C0 can be greater than the dimension of the smallest fold to be treated. But the maximum distance between the trailing edge of the nozzle V0 and the leading edge of the nozzle V1 is equal to the dimension of the smallest fold to be treated. As a result, the maximum tolerable rear stopping is equal to the distance between the leading edge of the nozzle V0 and the jogging edge. This tolerable rear coating may be more or less important depending on whether the leading edge of the nozzle V1 is far from the jogging edge.
  • the destacker according to the invention is particularly suitable for mail folds having dimensions and a weight varying in a wide spectrum.
  • the rear stripping tolerated by the destacker can go up to 150mm for a dimension of the smallest fold equal to 125mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Controlling Sheets Or Webs (AREA)

Claims (13)

  1. Vorrichtung zur Vereinzelung flacher Gegenstände, insbesondere Poststücke, mit einer Richtfläche (3), die eine Anschlagebene bildet, an der ein Stapel von auf der Kante stehenden flachen Gegenständen (L1, L2, L3) anliegt, mit einem Endlosband (6), das kontinuierlich vor der freien Seite des ersten Gegenstands des Stapels umläuft, um die Gegenstände des Stapels zu einem Ausgang zu befördern, mit einem ersten Greifmittel (7), das auf der Seite der Anlage-Ebene der Richtfläche liegt, um Gegenstände des Stapels zu ergreifen und an das Endlosband zu drücken, wenn dieses Mittel aktiv ist, mit einem zweiten Greifmittel (8), das zwischen dem ersten Greifmittel und der Ausrichtebene liegt, um die Gegenstände des Stapels zu ergreifen und gegen das Endlosband zu drücken, wenn dieses Mittel aktiv ist, mit mindestens einer Sonde (18), die auf derjenigen Seite der Ebene der Richtfläche liegt, die der Anlage-Ebene für den Stapel entgegengerichtet ist, um ein Signal bei Erfassung des Vorliegens oder Nichtvorliegens eines Gegenstands am Ausgang zu liefern, mit einem Steuermittel (10), um selektiv das zweite Greifmittel aufgrund des von der Sonde (18) gelieferten Signals zu betätigen und um einen Vereinzelungszyklus durchzuführen, dadurch gekennzeichnet, daß das Steuermittel so ausgebildet ist, daß es feststellt, ob der erste Gegenstand des Stapels hinter das zweite Greifmittel zurückversetzt ist, indem der Betrieb des zweiten Greifmittels (8) während des Vereinzelungszyklus kontrolliert wird, und weiterhin so, daß als Antwort nur auf die Erfassung eines Ausrichtfehlers ein Nachausrichtzyklus unternommen wird, während dem sowohl selektiv und nacheinander das erste Greifmittel (7) und das zweite Greifmittel (8) betätigt werden.
  2. Vorrichtung nach Anspruch 1, in der das Steuermittel eine Stoppuhr kontrolliert, die gleichzeitig mit der Betätigung des zweiten Greifmittels (8) während des Vereinzelungszyklus gestartet wird und bei Erfassung eines Gegenstands durch die Sonde angehalten wird, und in der das Steuermittel so ausgebildet ist, daß es einen Nachausrichtzyklus durchführt, wenn die Stoppuhr nicht vor Ablauf einer Sollverzögerung angehalten wurde.
  3. Vorrichtung nach Anspruch 2, bei der das Steuermittel so ausgebildet ist, daß es einen Zyklus der Erfassung eines Ausrichtfehlers durchführt, der in einem Zeitpunkt t = 0 beginnt, welcher als Zeitpunkt definiert ist, von dem an das Steuermittel (10) das zweite Greifmittel (8) für einen Vereinzelungszyklus betätigt, während die Sonde (18) keinen Gegenstand erfaßt, wobei der Zyklus der Erfassung eines Ausrichtfehlers die folgenden alternativen Schritte enthält:
    a) wenn nach einer ersten Zeitverzögerung T1, die kleiner als eine zweite Zeitverzögerung T2 ist, die Sonde einen Gegenstand erfaßt, zählt das Steuermittel einen Zähler weiter und setzt den Vereinzelungszyklus fort, und wenn der Zähler einen vorbestimmten Zählwert nach mehreren aufeinanderfolgenden Vereinzelungszyklen erreicht, startet das Steuermittel einen Nachausrichtzyklus,
    b) oder wenn nach der zweiten Zeitverzögerung T2 die Sonde keinen Gegenstand erfaßt hat, startet das Steuermittel einen Nachausrichtzyklus.
  4. Vorrichtung nach Anspruch 2, mit einer ersten Sonde (17), die auf der Seite der Ebene der Richtfläche liegt, die der Stützfläche für den Stapel gegenüberliegt, und mit einer zweiten, in Transportrichtung des Endlosbands hinter der ersten Sonde liegenden zweiten Sonde (18), die Signale bei Vorliegen oder Nichtvorliegen eines Gegenstands am Ausgang liefert, wobei das Steuermittel (10) so ausgebildet ist, daß es einen Nachausrichtzyklus durchführt, der im Zeitpunkt t' = 0 beginnt, an dem das Steuermittel das zweite Greifmittel abschaltet, wobei der Nachausrichtzyklus die folgenden alternativen Schritte enthält:
    a) wenn die erste Sonde (17) keinen Gegenstand feststellt, betätigt das Steuermittel (10) das erste Greifmittel (7), um mindestens einen Gegenstand des Stapels zu ergreifen und gegen das Endlosband zu drücken, bis
    - die erste Sonde (17) einen Gegenstand erfaßt,
    - oder eine Warteverzögerung TRMAX abgelaufen ist,
       worauf das Steuermittel (10) das erste Greifmittel (7) abschaltet und zugleich das zweite Greifmittel (8) einschaltet,
    b) oder wenn die erste Sonde (17) einen Gegenstand erfaßt, betätigt das Steuermittel (10) das erste Greifmittel (7), bis
    - die zweite Sonde (18) einen Gegenstand erfaßt,
    - oder eine Warteverzögerung TRMAX abgelaufen ist,
       worauf das Steuermittel (10) das erste Greifmittel (7) abschaltet und zugleich das zweite Greifmittel (8) einschaltet.
  5. Vorrichtung nach Anspruch 4, bei der das Steuermittel so ausgebildet ist, daß es den Schritt a) des Nachausrichtzyklus durch einen Vereinzelungszyklus fortsetzt, wenn die zweite Sonde einen Gegenstand vor Ablauf einer Warteverzögerung TRMAX erfaßt, die in dem Zeitpunkt beginnt, in dem das Steuermittel das zweite Greifmittel aktiviert, während ansonsten ein neuer Nachausrichtzyklus folgt.
  6. Vorrichtung nach Anspruch 4, bei der das Steuermittel so ausgebildet ist, daß es einen Vereinzelungszyklus bei Erfassung eines Gegenstands durch die erste Sonde und bei Erreichen des bestimmten Zählwerts durch den Zähler unternimmt, solange die erste Sonde einen Gegenstand erfaßt, um anschließend einen Nachausrichtzyklus durchzuführen.
  7. Vorrichtung nach Anspruch 4, bei der das Steuermittel so ausgebildet ist, daß es den Schritt b) des Nachausrichtzyklus durch einen Vereinzelungszyklus fortsetzt.
  8. Vorrichtung nach Anspruch 3, bei der die Greifmittel eine erste Saugdüse (7) und eine zweite Saugdüse (8) aufweisen, die im Abstand hinter der ersten Düse in Förderrichtung des Endlosbands liegt, wobei diese Saugdüsen an einen Unterdruckbehälter (9) angeschlossen sind und selektiv durch das Steuermittel (10) betätigt werden, um die Gegenstände vom Stapel zu ergreifen und gegen das Endlosband zu drücken, wobei weiter eine Unterdruckmeßsonde (12) in dem Unterdruckbehälter vorgesehen ist, die ein Signal liefert, wenn der in dem Behälter herrschende Unterdruck kleiner oder größer als ein Sollunterdruck ist, und wobei der Zyklus der Erfassung eines Ausrichtfehlers außerdem einen alternativen Schritt c) enthält, bei dem das Steuermittel so ausgebildet ist, daß es einen Nachausrichtzyklus durchführt, wenn die Unterdruckmeßsonde (12) feststellt, daß der in dem Behälter herrschende Unterdruck geringer als der Sollwert ist.
  9. Vorrichtung nach einem der Ansprüche 4 und 8, bei der im Schritt a) des Nachausrichtzyklus das Steuermittel die erste Saugdüse betätigt, um mindestens einen Gegenstand des Stapels zu ergreifen und gegen das Endlosband zu drücken, bis die Unterdruckmeßsonde feststellt, daß der Unterdruck im Unterdruckbehälter geringer als der Sollunterdruck ist.
  10. Vorrichtung nach einem der Ansprüche 4 und 8, bei der im Schritt b) des Nachausrichtzyklus das Steuermittel die erste Saugdüse betätigt, um mindestens einen Gegenstand des Stapels zu ergreifen und gegen das Endlosband zu drücken, bis die Unterdruckmeßsonde feststellt, daß der Unterdruck im Unterdruckbehälter geringer als der Sollunterdruck ist.
  11. Vorrichtung nach einem der Ansprüche 3 bis 10, bei der die erste Verzögerung T1 50 ms und die zweite Verzögerung T2 150 ms beträgt.
  12. Vorrichtung nach einem der Ansprüche 3 bis 11, bei der die Warteverzögerung TRMAX zwischen 100 und 500 ms variiert.
  13. Vorrichtung nach Anspruch 8, die außerdem eine Kammer (11) enthält, in der ein geringer Unterdruck herrscht und die zwischen den beiden Saugdüsen liegt.
EP93402319A 1992-09-25 1993-09-22 Vorrichtung zum Entstapeln von flachen Gegenständen mit Vorrichtung zum Ausrichten der Vorderkante Expired - Lifetime EP0589789B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9211468A FR2696163B1 (fr) 1992-09-25 1992-09-25 Dépileur d'articles plats incluant un dispositif de retaquage.
FR9211468 1992-09-25

Publications (2)

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EP0589789A1 EP0589789A1 (de) 1994-03-30
EP0589789B1 true EP0589789B1 (de) 1997-05-28

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EP93402319A Expired - Lifetime EP0589789B1 (de) 1992-09-25 1993-09-22 Vorrichtung zum Entstapeln von flachen Gegenständen mit Vorrichtung zum Ausrichten der Vorderkante

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US (1) US5391051A (de)
EP (1) EP0589789B1 (de)
CA (1) CA2106906C (de)
DE (1) DE69311042T2 (de)
FR (1) FR2696163B1 (de)

Cited By (1)

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US7815184B2 (en) 2006-05-11 2010-10-19 Kabushiki Kaisha Toshiba Paper sheet separating and take-out device

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Publication number Priority date Publication date Assignee Title
FR2710624B1 (fr) * 1993-09-27 1995-11-10 Cga Hbs Préhenseur d'objets plats et dispositif de dépilage équipé de ce préhenseur.
CH689802A5 (de) * 1995-01-16 1999-11-30 Grapha Holding Ag Einrichtung zur Vereinzelung von stapelweise zugeführten flachen Gegenständen.
US5807065A (en) * 1997-01-21 1998-09-15 Kuhl; Jeffrey B. Apparatus for automatically unstacking horizontal lid members from a vertically extending stack thereof
US5791867A (en) * 1997-01-21 1998-08-11 Kuhl; Jeffrey B. Apparatus for automatically unstacking of trays from a vertically extending interlocking stack thereof
JP2990185B1 (ja) * 1998-10-02 1999-12-13 日本電気株式会社 紙葉類の供給装置
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CA2106906A1 (fr) 1994-03-26
CA2106906C (fr) 2004-04-06
DE69311042D1 (de) 1997-07-03
FR2696163B1 (fr) 1994-11-04
US5391051A (en) 1995-02-21
DE69311042T2 (de) 1997-09-04
FR2696163A1 (fr) 1994-04-01
EP0589789A1 (de) 1994-03-30

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