EP0347437B1 - Envelope feeder with adjustable constant overlap - Google Patents

Envelope feeder with adjustable constant overlap Download PDF

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Publication number
EP0347437B1
EP0347437B1 EP88908653A EP88908653A EP0347437B1 EP 0347437 B1 EP0347437 B1 EP 0347437B1 EP 88908653 A EP88908653 A EP 88908653A EP 88908653 A EP88908653 A EP 88908653A EP 0347437 B1 EP0347437 B1 EP 0347437B1
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EP
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Prior art keywords
stack
envelope
conveying belt
envelopes
feed
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EP88908653A
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German (de)
French (fr)
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EP0347437A1 (en
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Reinhard Stenz
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STENZ Reinhard
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/66—Advancing articles in overlapping streams
    • B65H29/6654—Advancing articles in overlapping streams changing the overlapping figure
    • 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
    • B65H3/126—Suction bands or belts separating from the bottom of pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/24—Feeding articles in overlapping streams, i.e. by separation of articles from a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/423—Depiling; Separating articles from a pile
    • B65H2301/4232—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles
    • B65H2301/42322—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles from bottom of the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance

Definitions

  • the present invention relates to an envelope feeder for printing presses, in which the envelopes are fed continuously from a refill envelope stack to a storage stack in the form of a forced clutch, a transport arrangement having a first conveyor belt, which together with a second conveyor belt, is arranged around a stack between the refill stack and the storage stack Deflection pulley is guided around in order to turn over the enveloped transported envelopes onto the second conveyor belt, which transports the envelopes under the storage stack, with an adjustable scraper above the first conveyor belt holding back the refill stack.
  • the US-A-4,369,959 already describes an envelope feeder for printing presses, in which the envelopes are fed in the form of a forced clutch from a refill envelope stack to a storage stack, with a transport arrangement with a first conveyor belt, which together with a second one, is located between the refill stack and the storage stack Conveyor belt is guided around a deflection roller in order to transfer the enveloped transported envelopes to the second conveyor belt, with a scraper over the holds the refill stack on the first conveyor belt.
  • the object of the present invention is therefore to create an envelope feeder of the aforementioned type, in which the envelopes are reliably transported with a very small overlap distance, the overlap distance having only small scatter values.
  • the second conveyor belt transports the envelopes under the storage stack and in that the first conveyor belt has an air-permeable perforation, under which conveyor belt in the area of the refill stack there is a vacuum chamber which generates a suction flow onto the bottom envelope of the refill stack to produce a temporary one Driving connection between the conveyor belt and the bottom envelope for transporting it under the scraper is arranged, the scraper to change the overlap of the Envelopes are adjustable in the transport direction relative to the vacuum chamber and height-adjustable relative to the air-permeable conveyor belt, and the overlap corresponds to the distance between the rear edge of the vacuum chamber in the transport direction and the rear edge of the lowermost envelope in the refill stack located behind this edge of the vacuum chamber.
  • an air squeezing element is arranged above the second conveyor belt in front of the storage stack, in which case the air squeezing element is a rotatable hold-down roller.
  • a device for example a light barrier for monitoring the height of the storage stack, and a device for controlling the speed of the air-permeable conveyor belt depending on the height of the storage stack be provided and further a device, for example a light barrier for monitoring the height of the refill stack and emitting a signal when this height drops below a predetermined value.
  • Fig. 1d it is shown how the envelopes come to rest nicely on one another, if, as in Fig. 1c), only one small scaling distance was chosen.
  • Fig. 2 it is clearly shown how the scaling distance 5 can be set very easily, because it also corresponds to the distance between the left edge of the vacuum chamber and the left edge of the envelope 1. This scaling distance can now be deliberately and specifically varied by moving the envelope beige to the left or right.
  • this can be accomplished very easily with the displaceable barrier and the simultaneous stripper 6, because this barrier or stripper 6 can be displaced to the left and right and can then be fixed in any position.
  • the wiper 6 can also be shifted in height and can be fixed again in any position.
  • the task of the envelope feeder is now to form a storage stack 8 (FIG. 3), of which the scale feeder of the printing press can print the envelopes at any time can take away.
  • This storage stack 8 is achieved in that, in the case of a stack, further envelopes are continuously pushed in at the bottom and the stack thus becomes ever larger if the envelopes are not continuously removed again from the scale feeder of the printing press. So that this storage stack cannot get too big, it is provided with a light barrier so that the envelope feed can be electronically controlled in this way.
  • a photocell can also be installed in the refill stack 11, which emits a signal as soon as you have to refill.
  • a hold-down roller 7 directly in front of the storage stack 8, which ensures that any air that may be present is pressed out of the envelopes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Handling Of Sheets (AREA)
  • Mechanical Operated Clutches (AREA)
  • Food-Manufacturing Devices (AREA)
  • Making Paper Articles (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)

Abstract

PCT No. PCT/CH88/00196 Sec. 371 Date Jul. 10, 1989 Sec. 102(e) Date Jul. 10, 1989 PCT Filed Jun. 13, 1989 PCT Pub. No. WO89/04805 PCT Pub. Date Jun. 1, 1989.An envelope feeder which can be used on virtually all existing printing machines without the need to synchronize the latter comprises a low-pressure chamber (3), a perforated conveyor belt (4) and an adjustable barrier (6). An overlap with a very small overlap length (5) is thereby achieved. The envelope feeder can therefore be used not only for small envelopes (1), but also for those with very narrow flaps (2).

Description

Die vorliegende Erfindung betrifft einen Couvertanleger für Druckmaschinen, bei dem die Couverts in Form einer Zwangsschuppung von einem Nachfüll-Couvertstapel einem Speicherstapel kontinuierlich zugeführt werden, wobei sich zwischen Nachfüllstapel und Speicherstapel eine Transportanordnung befindet mit einem ersten Transportband, welches zusammen mit einem zweiten Transportband um eine Umlenkrolle herumgeführt ist, um die aufgeschuppt transportierten Couverts umgedreht auf das zweite Transportband zu übergeben, welches die Couverts unter den Speicherstapel transportiert, wobei ein verstellbarer Abstreifer über dem ersten Transportband den Nachfüllstapel zurückhält.The present invention relates to an envelope feeder for printing presses, in which the envelopes are fed continuously from a refill envelope stack to a storage stack in the form of a forced clutch, a transport arrangement having a first conveyor belt, which together with a second conveyor belt, is arranged around a stack between the refill stack and the storage stack Deflection pulley is guided around in order to turn over the enveloped transported envelopes onto the second conveyor belt, which transports the envelopes under the storage stack, with an adjustable scraper above the first conveyor belt holding back the refill stack.

Die US-A-4,369,959 beschreibt bereits einen Couvertanleger für Druckmaschinen, bei dem die Couverts in Form einer Zwangsschuppung von einem Nachfüll-Couvertstapel einem Speicherstapel zugeführt werden, wobei sich zwischen Nachfüllstapel und Speicherstapel eine Transportanordnung befindet mit einem ersten Transportband, welches zusammen mit einem zweiten Transportband um eine Umlenkrolle geführt ist, um die aufgeschuppt transportierten Couverts auf das zweite Transportband zu übergeben, wobei ein Abstreifer über dem ersten Transportband den Nachfüllstapel zurückhält.The US-A-4,369,959 already describes an envelope feeder for printing presses, in which the envelopes are fed in the form of a forced clutch from a refill envelope stack to a storage stack, with a transport arrangement with a first conveyor belt, which together with a second one, is located between the refill stack and the storage stack Conveyor belt is guided around a deflection roller in order to transfer the enveloped transported envelopes to the second conveyor belt, with a scraper over the holds the refill stack on the first conveyor belt.

Bei einer solchen Anordnung ist aber der Reibungswiderstand zwischen Papier und Band im Andruckbereich der Walze als Mitnahmeverbindung Ursache grosser Unregelmässigkeiten in der Schuppung der Couverts, was dazu zwingt, die Couverts in deren Längsrichtung mit seitlich liegenden Couvertdeckeln zu fördern.With such an arrangement, however, the frictional resistance between paper and tape in the pressure area of the roller as a driving connection is the cause of large irregularities in the scaling of the envelopes, which forces the envelopes to be conveyed in the longitudinal direction with the envelope covers lying on the side.

Aufgabe der vorliegenden Erfindung ist deshalb die Schaffung eines Couvertanlegers der vorgenannten Art, bei welchem die Couverts bei sehr kleiner Schuppungsdistanz zuverlässig transportiert werden, wobei die Schuppungsdistanz nur geringe Streuwerte aufweist.The object of the present invention is therefore to create an envelope feeder of the aforementioned type, in which the envelopes are reliably transported with a very small overlap distance, the overlap distance having only small scatter values.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass das zweite Transportband die Couverts unter den Speicherstapel transportiert und dass das erste Transportband eine luftdurchlässige Perforation aufweist, unter welchem Transportband im Bereich des Nachfüllstapels eine, einen Saugstrom auf das unterste Couvert des Nachfüllstapels erzeugende Unterdruckkammer zur Herstellung einer temporären Mitnahmeverbindung zwischen Transportband und unterstem Couvert zu dessen Transport unter dem Abstreifer hindurch, angeordnet ist, wobei der Abstreifer-zur Veränderung der Ueberlappung der Couverts-in Transportrichtung relativ zur Unterdruckkammer verstellbar sowie höhenverstellbar relativ zum luftdurchlässigen Transportband ist, und wobei die Ueberlappung dem Abstand zwischen dem in Transportrichtung hinteren Rand der Unterdruckkammer und dem in Transportrichtung hinteren, hinter diesem Rand der Unterdruckkammer liegenden Rand des untersten Couverts im Nachfüllstapel entspricht.This object is achieved according to the invention in that the second conveyor belt transports the envelopes under the storage stack and in that the first conveyor belt has an air-permeable perforation, under which conveyor belt in the area of the refill stack there is a vacuum chamber which generates a suction flow onto the bottom envelope of the refill stack to produce a temporary one Driving connection between the conveyor belt and the bottom envelope for transporting it under the scraper is arranged, the scraper to change the overlap of the Envelopes are adjustable in the transport direction relative to the vacuum chamber and height-adjustable relative to the air-permeable conveyor belt, and the overlap corresponds to the distance between the rear edge of the vacuum chamber in the transport direction and the rear edge of the lowermost envelope in the refill stack located behind this edge of the vacuum chamber.

Diese Massnahmen bewirken zunächst eine Vereinfachung des Transportes der Couverts insofern, als diese durch das zweite Transportband zum Speicherstapel transportiert werden, ohne dass diese einem weiteren Transportband übergeben werden müssten. Zudem wird nun eine genau einstellbare präzise Zwangsschuppung erzielt und werden Unregelmässigkeiten in der Schuppung vermieden, so dass es ermöglicht wird, die Couverts mit quer liegenden Couvertsdeckel zu transportieren.These measures initially simplify the transport of the envelopes insofar as they are transported to the storage stack by the second conveyor belt, without these having to be handed over to another conveyor belt. In addition, a precisely adjustable precise overlap is now achieved and irregularities in the overlap are avoided, so that it is possible to transport the envelopes with the envelope cover lying transversely.

Vorteilhafte Ausgestaltungen können dann darin gesehen werden, dass über dem zweiten Transportband vor dem Speicherstapel ein Luftauspresselement angeordnet ist, wobei dann das Luftauspresselement eine drehbare Niederhaltewalze ist. Weiter kann eine Vorrichtung, z.B. Lichtschranke zum Ueberwachen der Höhe des Speicherstapels und eine Vorrichtung zum Steuern der Geschwindigkeit des luftdurchlässigen Transportbandes in Abhängigkeit der Höhe des Speicherstapels vorgesehen sein und weiter eine Vorrichtung, z.B. Lichtschranke zum Ueberwachen der Höhe des Nachfüllstapels und Abgeben eines Signals, wenn diese Höhe unter einen vorbestimmten Wert sinkt.Advantageous configurations can then be seen in the fact that an air squeezing element is arranged above the second conveyor belt in front of the storage stack, in which case the air squeezing element is a rotatable hold-down roller. Furthermore, a device, for example a light barrier for monitoring the height of the storage stack, and a device for controlling the speed of the air-permeable conveyor belt depending on the height of the storage stack be provided and further a device, for example a light barrier for monitoring the height of the refill stack and emitting a signal when this height drops below a predetermined value.

Um überhaupt die Couverts mit der breiten Seite und somit mit dem Deckel voraus transportieren zu können, ohne dass die folgenden Couverts beim Zusammenschieben einander unter den Deckel rutschen, musste zunächst das Problem gelöst werden, einen Couvertanleger zu konstruieren, welcher bei einer sehr kleinen Schuppungsdistanz von beispielsweise weniger als 2 cm sehr zuverlässig arbeitet und nur geringe Streuwerte aufweist.In order to be able to transport the envelopes with the wide side and thus with the lid ahead without the following envelopes sliding under the lid when pushed together, the problem of designing an envelope feeder that had a very small shingling distance of For example, less than 2 cm works very reliably and has only low scatter values.

Wie Fig. 1 zeigt, ist dies vor allem für Selbstklebe-Couverts 1 notwendig, welche nur einen sehr schmalen Deckelstreifen 2 von ca. 2 cm aufweisen.As shown in FIG. 1, this is necessary above all for self-adhesive envelopes 1 which have only a very narrow cover strip 2 of approximately 2 cm.

Aus Fig. 1b) ist ersichtlich, was passiert, wenn die Schuppungsdistanz, wie in Fig. 1a) gezeigt, zu gross war. Hier werden dann die nachfolgenden Couverts 1 bei der Bildung des Speicherstapels 8 fälschlicherweise unter den Deckel 2 des vorangegangenen Couverts geschoben.From Fig. 1b) it can be seen what happens if the scaling distance, as shown in Fig. 1a), was too large. Here the subsequent envelopes 1 are erroneously pushed under the cover 2 of the previous envelope when the storage stack 8 is formed.

In Fig. 1d) ist gezeigt, wie die Couverts wieder schön aufeinander zu liegen kommen, wenn, wie in Fig. 1c), nur eine kleine Schuppungsdistanz gewählt wurde.In Fig. 1d) it is shown how the envelopes come to rest nicely on one another, if, as in Fig. 1c), only one small scaling distance was chosen.

Versuche haben gezeigt, dass so kleine Schuppungsdistanzen mit ganz minimen Abweichungen nur dann erreicht werden können, wenn man mit Hilfe einer Unterdruckkammer 3 (Fig. 2), einem gelochten Transportband 4 und einer verstellbaren Barriere 6 die geforderte Präzision und Zuverlässigkeit erreicht.Tests have shown that such small shingling distances can be achieved with very minimal deviations only if the required precision and reliability can be achieved with the aid of a vacuum chamber 3 (FIG. 2), a perforated conveyor belt 4 and an adjustable barrier 6.

In Fig. 2a) ist dargestellt, wie das unterste Couvert von der Unterdruckkammer 3 angesogen wird. Dies hat zur Folge, dass es auf dem Transportband 4 haften bleibt und von ihm weggezogen wird. Sobald die hinterste Kante des Couverts genügend nach rechts gewandert ist, kann die Sogwirkung auch auf das zweitunterste Couvert ausgeübt werden.2a) shows how the lowermost envelope is drawn in by the vacuum chamber 3. The result of this is that it sticks to the conveyor belt 4 and is pulled away from it. As soon as the rear edge of the envelope has moved to the right enough, the suction effect can also be exerted on the second bottom envelope.

In Fig. 2b) wird genau diese Grenzsituation gezeigt und in
Fig. 2c) ist das zweitunterste Couvert bereits schon von dieser Sogwirkung ergriffen worden und wandert ebenfalls mit dem untersten Couvert nach rechts, wobei das zweite Couvert um die Schuppungsdistanz 5 dem ersten Couvert gegenüber nach rechts versetzt ist. Bei der Einstellung des Unterdruckes ist es daher auch wichtig, dass dieser in der Stärke richtig dosiert wird. So werden bei zu hohem Unterdruck (z.B. 50 mbar) gleich zwei Couverts gleichzeitig weggezogen, während bei weniger als der Hälfte dieses Wertes ein einwandfreies Funktionieren gewährleistet ist.This limit situation is shown in FIG. 2b) and in
2c), the second lowest envelope has already been gripped by this suction effect and likewise moves to the right with the lowest envelope, the second envelope being offset to the right by the scaling distance 5 from the first envelope. When setting the vacuum, it is therefore important that the strength is dosed correctly. So if the vacuum is too high (eg 50 mbar) two envelopes pulled away at the same time, while less than half of this value guarantees perfect functioning.

In Fig. 2 wird anschaulich gezeigt, wie die Schuppungsdistanz 5 sehr einfach eingestellt werden kann, weil sie gleichzeitig auch dem Abstand zwischen dem linken Rand der Unterdruckkammer und dem linken Rand des Couverts 1 entspricht. Diese Schuppungsdistanz lässt sich nun bewusst und gezielt variieren, indem die Couvertbeige nach links oder nach rechts verschoben wird.In Fig. 2 it is clearly shown how the scaling distance 5 can be set very easily, because it also corresponds to the distance between the left edge of the vacuum chamber and the left edge of the envelope 1. This scaling distance can now be deliberately and specifically varied by moving the envelope beige to the left or right.

Gemäss Fig. 3 kann dies mit der verschiebbaren Barriere und dem gleichzeitigen Abstreifer 6 sehr einfach bewerkstelligt werden, denn diese Barriere oder Abstreifer 6 ist nach links und rechts verschiebbar und anschliessend in jeder Position fixierbar.According to FIG. 3, this can be accomplished very easily with the displaceable barrier and the simultaneous stripper 6, because this barrier or stripper 6 can be displaced to the left and right and can then be fixed in any position.

Um eine gewisse Sicherheit dafür zu gewährleisten, dass nicht zu viele Couverts gleichzeitig mit nach rechts gezogen werden, kann der Abstreifer 6 auch in der Höhe verschoben und auch hier in jeder Position wieder fixiert werden. Aufgabe des Couvertanlegers ist es nun, einen Speicherstapel 8 (Fig. 3) zu bilden, von dem der Schuppenanleger der Druckmaschine jederzeit zu bedruckende Couverts oben wegnehmen kann. Dieser Speicherstapel 8 wird dadurch erreicht, dass bei einem Stapel kontinuierlich weitere Couverts unten hineingeschoben werden und so der Stapel immer grösser wird, falls die Couverts nicht andauernd vom Schuppenanleger der Druckmaschine wieder oben entfernt werden. Damit dieser Speicherstapel aber trotzdem nicht zu gross werden kann, wird diese mit einer Lichtschranke versehen, damit die Couvertzufuhr auf diesem Weg elektronisch gesteuert werden kann. Zusätzlich kann eine Photozelle auch beim Nachfüllstapel 11 installiert werden, welche ein Signal ertönen lässt, sobald man wieder nachfüllen muss.In order to ensure a certain degree of certainty that too many envelopes are not being pulled to the right at the same time, the wiper 6 can also be shifted in height and can be fixed again in any position. The task of the envelope feeder is now to form a storage stack 8 (FIG. 3), of which the scale feeder of the printing press can print the envelopes at any time can take away. This storage stack 8 is achieved in that, in the case of a stack, further envelopes are continuously pushed in at the bottom and the stack thus becomes ever larger if the envelopes are not continuously removed again from the scale feeder of the printing press. So that this storage stack cannot get too big, it is provided with a light barrier so that the envelope feed can be electronically controlled in this way. In addition, a photocell can also be installed in the refill stack 11, which emits a signal as soon as you have to refill.

Vorteilhaft ist ferner eine Niederhaltewalze 7 unmittelbar vor dem Speicherstapel 8, welche dafür sorgt, dass eventuell vorhandene Luft aus den Couverts gepresst wird.Also advantageous is a hold-down roller 7 directly in front of the storage stack 8, which ensures that any air that may be present is pressed out of the envelopes.

Mit diesem Zusatz kann nun ein altes Uebel beseitigt werden, welches bis anhin bei den bisherigen Maschinen bestand. Sobald nämlich beim Bedrucken der Couverts die überschüssige Luft herausgepresst wurde, entstand ein Flattern des Papiers und dadurch eine verschwommene und verwischte Bedruckung. Mit der genannten Niederhaltewalze 7 wird zum vornherein dafür gesorgt, dass während dem Druckprozess keine Luft mehr vorhanden ist und dadurch wird schon beim ersten Durchlauf eine hohe Druckpräzision erreicht.This addition can now be used to remove an old evil that previously existed on previous machines. As soon as the excess air was squeezed out when printing on the envelopes, the paper fluttered and the result was blurred and blurred printing. With the hold-down roller 7 mentioned, it is ensured from the outset that there is no more air during the printing process, and as a result a high printing precision is achieved during the first pass.

Damit die Couverts überhaupt unten in den Speicherstapel 8 geschoben werden können, ist es notwendig, dafür zu sorgen, dass bei der Schuppung das nachfolgende Couvert nicht über, sondern unter dem vorangehenden liegt, damit die nachfolgenden Couverts auch wirklich zuunterst in den Speicherstapel geschoben werden. Dies erreicht man, indem die geschuppten Couverts auf die gleiche Art und Weise gewendet werden, wie dies schon bei den bereits bekannten Couvertanleger-Maschinen gemacht wird. Man lässt nämlich unter dem ersten Transportband 4 ein zweites Transportband 10 mit der genau gleichen Geschwindigkeit laufen. Die Couverts kommen so nach der ersten Umlenkrolle des ersten Transportbandes 4 auf das zweite darunterliegende Transportband 10 zu liegen.So that the envelopes can be pushed into the storage stack 8 at the bottom, it is necessary to ensure that the subsequent envelope is not above, but below the preceding one, so that the subsequent envelopes are really pushed to the bottom of the storage stack. This is achieved by turning the scaled envelopes in the same way as is already done with the already known envelope feeder machines. Namely, a second conveyor belt 10 is run under the first conveyor belt 4 at exactly the same speed. After the first deflection roller of the first conveyor belt 4, the envelopes come to lie on the second conveyor belt 10 underneath.

Durch diese Massnahmen ist es nunmehr möglich, den Couvertanleger für praktisch alle Druckmaschinen einzusetzen, ohne dass dabei eine Synchronisation mit der Druckmaschine notwendig ist und da es dank einer genau einstellbaren präzisen Zwangsschuppung möglich ist, die Couverts auch mit der Breitseite voraus auf dem Transportband zu transportieren.Thanks to these measures, it is now possible to use the envelope feeder for practically all printing presses without the need to synchronize with the printing press and since it is possible to transport the envelopes on the conveyor belt with the broad side ahead thanks to precisely adjustable precise clutch .

Claims (5)

  1. An envelope feed for printers, in which the envelopes (1) are supplied continuously in the form of a forced stream from an envelope feed stack (11) to a storage stack (8), a conveying arrangement being located between feed stack (11) and storage stack (8), which conveying arrangement has a first conveying belt (4) which is guided together with a second conveying belt (10) around a deflecting roll in order to transfer the stream-conveyed envelopes rotated onto the second conveying belt, an adjustable stripper (6) above the first conveying belt holding back the feed stack, characterized in that the second conveying belt (1) conveys the envelopes (1) under the storage stack (8) and in that the first conveying belt (4) comprises an air-permeable perforation, under which conveying belt in the area of the feed stack (11) there is arranged a vacuum chamber (3) generating a suction stream onto the lowest envelope of the feed stack, to produce a temporary entraining connection between conveying belt and lowest envelope for the conveying thereof through under the stripper (6), the stripper being adjustable - to alter the overlap (5) of the envelopes - in the conveying direction relative to the vacuum chamber as well as height-adjustable relative to the air-permeable conveying belt, and the overlap (5) corresponding to the distance between the edge, to the rear in the conveying direction, of the vacuum chamber (3) and the edge, to the rear in the conveying direction and lying behind said edge of the vacuum chamber, of the lowest envelope in the feed stack (11).
  2. An envelope feed according to claim 1, characterized in that an air ejection member (7) is arranged above the second conveying belt (10) in front of the storage stack (8).
  3. An envelope feed according to claim 2, characterized in that the air ejection member is a rotatable pressure roller.
  4. An envelope feed according to claim 1, characterized by a device, e.g. a light barrier (28), to monitor the height of the storage stack (8) and a device to control the speed of the air-permeable conveying belt in dependence on the height of the storage stack.
  5. An envelope feed according to claim 1, characterized by a device, e.g. a light barrier (18), to monitor the height of the feed stack (11) and deliver a signal if this height drops below a predetermined value.
EP88908653A 1987-11-27 1988-10-19 Envelope feeder with adjustable constant overlap Expired - Lifetime EP0347437B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH4619/87A CH672773A5 (en) 1987-11-27 1987-11-27
CH4619/87 1987-11-27
PCT/CH1988/000196 WO1989004805A1 (en) 1987-11-27 1988-10-19 Envelope feeder with adjustable constant overlap

Publications (2)

Publication Number Publication Date
EP0347437A1 EP0347437A1 (en) 1989-12-27
EP0347437B1 true EP0347437B1 (en) 1994-06-15

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Family Applications (1)

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EP88908653A Expired - Lifetime EP0347437B1 (en) 1987-11-27 1988-10-19 Envelope feeder with adjustable constant overlap

Country Status (9)

Country Link
US (1) US5149076A (en)
EP (1) EP0347437B1 (en)
JP (1) JPH0780575B2 (en)
AT (1) ATE107262T1 (en)
CH (1) CH672773A5 (en)
CS (1) CS274685B2 (en)
DD (1) DD276074A5 (en)
DE (1) DE3850251D1 (en)
WO (1) WO1989004805A1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN108996279A (en) * 2018-06-04 2018-12-14 青岛科力特包装机械有限公司 A kind of tractor feeder with the mobile air suction mechanism of baffle at cardboard discharge

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Publication number Priority date Publication date Assignee Title
WO1990011953A1 (en) * 1989-04-03 1990-10-18 Reinhard Stenz Envelope feeder with a vacuum-operated suction drum
DE4122214A1 (en) 1991-07-04 1993-01-14 Bell & Howell Co DEVICE FOR TURNING A SHEET UNDER SIMULTANEOUSLY CHANGING THE CONVEYOR
US5678160A (en) * 1996-01-16 1997-10-14 Lexmark International, Inc. Envelope printing
US6179280B1 (en) 1999-06-11 2001-01-30 Andrew F. Coppolo Envelope processing apparatus
US6730870B1 (en) * 2002-09-16 2004-05-04 Todd C. Werner Flat bed sorter
US8596629B2 (en) * 2011-11-03 2013-12-03 Pitney Bowes Inc. Adaptive registration/binding apparatus for preparing collations
EP3050831B1 (en) * 2015-01-28 2017-09-20 Neopost Technologies Improved mix mail feeder

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108996279A (en) * 2018-06-04 2018-12-14 青岛科力特包装机械有限公司 A kind of tractor feeder with the mobile air suction mechanism of baffle at cardboard discharge
CN108996279B (en) * 2018-06-04 2020-02-11 青岛科力特包装机械有限公司 Paper conveying equipment with air suction mechanism moving along with baffle at paper board discharge position

Also Published As

Publication number Publication date
CS778088A2 (en) 1990-12-13
ATE107262T1 (en) 1994-07-15
JPH02502368A (en) 1990-08-02
US5149076A (en) 1992-09-22
WO1989004805A1 (en) 1989-06-01
CS274685B2 (en) 1991-09-15
DE3850251D1 (en) 1994-07-21
CH672773A5 (en) 1989-12-29
DD276074A5 (en) 1990-02-14
JPH0780575B2 (en) 1995-08-30
EP0347437A1 (en) 1989-12-27

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