EP0243852B1 - Sheet feeder table with blast nozzles - Google Patents

Sheet feeder table with blast nozzles Download PDF

Info

Publication number
EP0243852B1
EP0243852B1 EP87105845A EP87105845A EP0243852B1 EP 0243852 B1 EP0243852 B1 EP 0243852B1 EP 87105845 A EP87105845 A EP 87105845A EP 87105845 A EP87105845 A EP 87105845A EP 0243852 B1 EP0243852 B1 EP 0243852B1
Authority
EP
European Patent Office
Prior art keywords
sheet feeder
sheet
stack
sheets
rails
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
Application number
EP87105845A
Other languages
German (de)
French (fr)
Other versions
EP0243852A1 (en
Inventor
Manfred Fuss
Joachim Kurtz
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.)
Bauerle Mathias GmbH
Original Assignee
Bauerle Mathias GmbH
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 Bauerle Mathias GmbH filed Critical Bauerle Mathias GmbH
Priority to AT87105845T priority Critical patent/ATE44710T1/en
Publication of EP0243852A1 publication Critical patent/EP0243852A1/en
Application granted granted Critical
Publication of EP0243852B1 publication Critical patent/EP0243852B1/en
Expired legal-status Critical Current

Links

Images

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
    • B65H3/10—Suction rollers
    • 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
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/48—Air blast acting on edges of, or under, articles
    • 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

Definitions

  • the invention relates to a sheet feed table with two parallel, relative to each other adjustable sheet feed rails, which on their mutually facing sides directly above the table level each have a plurality of blowing nozzles, which are connected or can be connected to a common compressed air source, and with a separating device through which the bottom one Sheet from a stack of sheets that can be refilled from above is removed.
  • a separating device through which the bottom one Sheet from a stack of sheets that can be refilled from above is removed.
  • the separating devices of such sheet feed tables mostly consist of a suction roller, which has a plurality of radial suction holes and is provided with a sector-like vacuum chamber which is connected to a suction fan.
  • rollers consisting of rollers or rollers, which are driven synchronously with the suction roller and which pick up and transport the individual sheets.
  • Such sheet feed tables are e.g. used to feed single sheets from a stack of the same paper sheets at certain, preselectable time intervals to packaging machines, printing machines, labeling machines or the like.
  • the blowing nozzles arranged in the sheet guide rails By means of the blowing nozzles arranged in the sheet guide rails, compressed air is blown from both sides between the bottom sheets of a stack of sheets placed on top, which results in at least a thin air cushion formation between the individual sheets and thereby makes sheet separation easier and safer.
  • the suction roller With the help of the suction roller, the front end section of the bottom sheet is sucked in and passed under a stop edge which is fixed per se, but which can be adjusted to different thicknesses, of a vertical stop arranged above the suction roller and transported to the transport means arranged behind it, which thereafter the further transport of the isolated bow.
  • the formation of air cushions between the bottom sheet of the stack of sheets is necessary to relieve the bottom sheet of the weight of the stack. Accordingly, the size or the weight that can be placed on a stack depends on the load-bearing capacity of the air cushion or on the quality of the air cushion formation in the area of the lowest sheet.
  • the invention has for its object to improve a sheet feed table of the generic type with the simplest possible means with regard to the formation of air cushions in such a way that as little blowing air as possible can escape at the edge zones of the sheet stack lying on the sheet algae and thus as large a portion as possible from the blowing nozzles in the area the bottom sheet of the stack of sheets compressed air contributes to air cushion formation, so that the formed air cushion is able to carry larger stacks of sheets.
  • the at least approximately airtight arching rails on the mutually facing inner wall surfaces at the level of the blowing nozzles are each provided with a groove-like or fold-like extension which extends at least approximately over the entire contact length.
  • a further improvement in air cushion formation is achieved by the embodiment of the invention according to claim 2. With these additional measures, a further increase in the stackable height can be achieved.
  • the sheet feed table shown in the drawing consists of a rectangular, horizontal table top 1, on which two sheet feed rails 3 and 4 are arranged parallel to one another and adjustable transversely to one another.
  • This bow attachment rails 3, 4 are fixed by means of screws (not shown) to the table top 1 and by means of releasable clamping devices to a cross rail 5, which in turn is fastened in laterally raised tabs 6 and 7 of the table top 1.
  • a suction roller 8 is rotatably mounted in a recess in the front table top section below the cross rail 5 and parallel to it.
  • This suction roll 8 is designed in a known manner as a hollow cylinder and is provided with a plurality of radial suction holes 9 arranged in rows.
  • a sector-like vacuum chamber Inside the suction roll 8 there is a sector-like vacuum chamber, not shown in the drawing, which is connected to a suction pump.
  • the arrangement of the suction roller 8 is such that the upper table surface of the table top 1 extends at least approximately tangentially to the peripheral surface of the suction roller 8.
  • a vertical stop plate 10 is arranged above the suction roller 8, the lower stop edge 11 of which has a distance from the circumference of the suction roller 8 which corresponds approximately to the thickness of the sheets to be separated.
  • transport means are arranged at a short distance from the suction roller, which consist of several transport rollers 13 and two pressure rollers 14 fastened on a shaft 12, which are rotatably mounted in bearing housings 15 and 16. The task of these transport means is to continue to transport the bottom sheet taken individually from the stack by the suction roller 8.
  • the two sheet contact rails 3 and 4 seated on the table top 1 are arranged and formed in mirror image to one another. As can be seen from Fig. 2, they each consist of a rectangular tube 17 whose cavity 18 is sealed at the front and rear ends. In the bottom wall 19 of the rectangular tube 17, individually closable compressed air valves 20 are arranged over the entire length at regular intervals, which may be smaller in the front section than in the rest of the curved guide rails. These compressed air valves 20 each consist of a valve seat sleeve 21 and a valve closing plate 22 which is fastened to an adjusting button 24 by means of a shaft 23. In the closed position shown in FIG.
  • the valve closing plate 22 is pressed onto the valve seat sleeve 21 in a sealing manner by means of a compression spring 25 surrounding the stem 23.
  • the compressed air valve 20 is thus closed.
  • the adjusting knob 24 has a disk 26 with two diametrically opposed cams 27 which can drop into corresponding recesses 28 of an annular collar 29 when the relevant compressed air valve 20 is to be closed.
  • the adjusting knob is rotated relative to the collar 29 in such a way that the two cams 27 come to rest on the upper end edge 30 of the collar 29 and the valve closing plate 22 is lifted off the valve seat sleeve 21.
  • connection nipple 32 for a compressed air line, through which compressed air can be pressed into the cavity 18 by a compressed air source, not shown.
  • the lower bottom surface 33 of the rectangular tube 17 is glued with an elastic material, e.g. made of foam rubber, existing sealing tape 34, which has tunnel-shaped recesses 35 (see FIG. 7) at the points where a compressed air valve 20 is located.
  • This sealing tape 34 has at least approximately the width of the rectangular tube 17 and extends over its entire length, and it is used to produce an airtight seat between the table top 1 and the sheet contact rail 3 or 4, which prevents the unwanted escape of compressed air.
  • the inner side wall 36 of the rectangular tube 17 is provided with an upwardly extended guide wall 37, the height of which corresponds approximately to three times the height of the rectangular tube 17.
  • the entire inner surface of the inner side wall 36 and the guide wall 37 adjoining it at the top is clad with a smooth, flat sheet metal plate 38 which, up to the height of the bottom surface 33 of the rectangular tube 17, has a closed, flat, exactly perpendicular guide surface or Alignment surface for the sheet or sheet stack 53 (FIGS. 8 and 9) seated between the two positioning rails 3 and 4 on the table top 1.
  • Below the bottom surface 33 there is a groove-like or rabbet-like extension 39. This groove-like or rabbet-like extension 39 can either be formed by the sheet metal plate 38, as shown in FIGS.
  • the sheet metal plate 38 in between the bottom surface 33 of the rectangular tube 17 and the upper table surface 1 'of the table top 1 area by approximately the plate thickness d of, for example 0.5 mm is offset to the outside or that a sheet metal plate 38 'ending in the level of the bottom surface 33 of the rectangular tube 17 is deposited with an angle rail 40, the vertical leg 41 of which lies in a fold 42 of the side wall 36 of the rectangular tube 17 corresponding to its thickness and height, and whose horizontal leg 43 rests on the table surface 1 'of the table top, as shown in FIGS. 4 and 5.
  • the sheet metal plate 38 also has an integrally formed leg 44 which is angled into the horizontal.
  • the horizontal legs 43 and 44 each project into the stacking space delimited laterally by the two contact rails 3 and 4. Characterized in that the leg 43 is integrally formed on the leg 41 of the angle rail 40 or the horizontal leg 44 is integrally connected to the sheet metal plate 38, it is ensured that between the table surface 1 'of the table plate 1 and the wall section 45 laterally delimiting the extension 39 or 46 there can be no gap opening in which an arc of the stack could jam.
  • the lower end edge of the wall section 45 forming the extension 39 sits directly on the table surface 1 'of the table top without being provided with a horizontal leg 44.
  • the aforementioned risk that gap-like gaps form in the unevenness of the table surface 1 ', in which the lateral edge edges of a sheet can get caught, is not excluded.
  • the wall sections 45 and 46 which laterally delimit the groove-like extensions 39, are provided with openings 47 which form the blow nozzles and which are each separated separately with one of the openings 34 by the sealing tape 34 Compressed air valves 20 are connected. It is also advantageous if the longitudinal edge sections 35 'of the sealing tape lying between the individual recesses 35 lie as close as possible to the wall sections 45 and 46, respectively.
  • the openings 45 have an essentially rectangular shape with a height of approximately 2 mm and a length of 8-10 mm.
  • Screws are provided, with which the sheet contact rails 3 and 4 or their sealing strips 34 can be pressed firmly onto the table top 1, but which can be detached for laterally displacing the sheet contact rails 3 and 4.
  • a sealing strip 48 made of relatively soft rubber (for example 35 ° Shore hardness) or a rubber-like material, which extends from the inner surface to the inner surface of the bow contact rails 3 and 4, is provided, which has a flat, band-like cross section with two open on the underside, in Has continuous, groove-like cavities 49 and 50 in the longitudinal direction.
  • One of these groove-like cavities 50 is provided with an angular connecting piece 51, through which it can be connected to a suction pump by means of a hose 52. With the help of the vacuum created in the cavity 50, the sealing strip 48 is pressed airtight onto the surface of the table top 1. It is possible to either like the sealing strip.
  • Fig. 8 immediately behind the sheet stack 53 or to arrange as shown in FIG.
  • the leakage of compressed air at the trailing edge of the sheet stack can be reduced so much by the sealing strip 48, the length of which is to be coordinated in each case with the distance between the two sheet contact rails 3 and 4, that the air cushion formation thereby improved further increases the sheet stack height or the sheet stack weight allowed and that the paper separation can still be carried out without errors both at large stack heights and at the lowest stack heights up to the last sheet or sheet.
  • sealing strips 48 of different lengths are also required for sheets or sheets 53 of different widths.
  • the lengths of the sealing strips should be chosen to be about 3 to 5 mm larger than the spacing of the two arch contact rails 3 and 4, which is matched to the stack width, so that the ends of the sealing strip 48 are as directly as possible also on the inside of the arch contact rails 3, 4 or in their Extensions 39 are.

Landscapes

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

Abstract

In a sheet feed bench with two parallel sheet feed rails that are adjustable relative to one another and with each having blowing jets on their surfaces facing one another directly above the level of the bench, connected to a common source of compressed air, the sheet feed rails resting on the bench surface are provided with groove-like or notch-like enlargements at the level of the blowing jets. Each of these extend over the entire length of the sheet feeder rails. These enlargements make it possible to position the inner surfaces of the sheet feeder rails so closely and tightly against the longitudinal edges of the stack of sheets that only small amounts of compressed air can escape upward. The formation of an air cushion is improved by this in such a way that the stack height can be more than double without adversely affecting the single-sheet separation.

Description

Die Erfindung betrifft einen Bogenanlegetisch mit zwei parallelen, relativ zueinander verstellbaren Bogenanlegeschienen, welchen auf ihren einander zugekehrten Seiten unmittelbar über der Tischebene jeweils mehrere Blasdüsen aufweisen, die an eine gemeinsame Druckluftquelle angeschlossen bzw. anschließbar sind, und mit einer Vereinzelungsvorrichtung, durch welche der jeweils unterste Bogen eines von oben nachfüllbaren Bogenstapels entnommen wird. Eine derartige Vorrichtung ist durch die US-A 4 579 330 bekannt geworden.The invention relates to a sheet feed table with two parallel, relative to each other adjustable sheet feed rails, which on their mutually facing sides directly above the table level each have a plurality of blowing nozzles, which are connected or can be connected to a common compressed air source, and with a separating device through which the bottom one Sheet from a stack of sheets that can be refilled from above is removed. Such a device is known from US-A 4,579,330.

Die Vereinzelungsvorrichtungen solcher Bogenanlegetische bestehen meistens aus einer Saugwalze, die eine Vielzahl radialer Sauglöcher aufweist und mit einer sektorartigen Vakuumkammer versehen ist, die an ein Sauggebläse angschlossen ist. Hinter der Saugwalze sind in der Regel achsparallel dazu aus Walzen oder Rollen bestehende, synchron mit der Saugwalze angetriebene Transportmittel angeordnet, welche die vereinzelten Bogen aufnehmen und weitertransportieren. Derartige Bogenanlegetische werden z.B. dazu benutzt, von einem Stapel gleicher Papierbogen in bestimmten, vorwählbaren zeitlichen Abständen Einzelbogen an Verpackungsmaschinen, Druckmaschinen, Etikettiermaschinen od. dgl. zuzuführen. Mittels der in den Bogenanlegeschienen angeordneten Blasdüsen wird von beiden Seiten zwischen die jeweils untersten Bogen eines aufgelegten Bogenstapels Druckluft geblasen, die eine zumindest dünne Luftkissenbildung zwischen den einzelnen Bogen zur Folge hat und dadurch die Blattvereinzelung leich:er und sicherer macht. Mit Hilfe der Saugwalze wird jeweils der vordere Endabschnitt des untersten Bogens angesaugt und unter einer an sich feststehenden, jedoch auf unterschiedliche Dicken in der Höhe einstellbaren Anschlagkante eines vertikalen über der Saugwalze angeordneten Anschlages hindurchgeführt und zu den dahinter angeordneten Transportmitteln transportiert, welche danach den weiteren Transport des vereinzelten Bogens übernehmen. Die Luftkissenbildung zwischen den untersten Bogen des Bogenstapels ist erforderlich, um den jeweils untersten Bogen vom Gewicht des Stapels zu entlasten. Demzufolge ist die Größe bzw. das auflegbare Gewicht eines Stapels von der Tragfähigkeit des Luftkissens bzw. von der Qualität der Luftkissenbildung im Bereich der untersten Bogen abhängig.The separating devices of such sheet feed tables mostly consist of a suction roller, which has a plurality of radial suction holes and is provided with a sector-like vacuum chamber which is connected to a suction fan. As a rule, behind the suction roller, axially parallel to it, rollers, consisting of rollers or rollers, are arranged, which are driven synchronously with the suction roller and which pick up and transport the individual sheets. Such sheet feed tables are e.g. used to feed single sheets from a stack of the same paper sheets at certain, preselectable time intervals to packaging machines, printing machines, labeling machines or the like. By means of the blowing nozzles arranged in the sheet guide rails, compressed air is blown from both sides between the bottom sheets of a stack of sheets placed on top, which results in at least a thin air cushion formation between the individual sheets and thereby makes sheet separation easier and safer. With the help of the suction roller, the front end section of the bottom sheet is sucked in and passed under a stop edge which is fixed per se, but which can be adjusted to different thicknesses, of a vertical stop arranged above the suction roller and transported to the transport means arranged behind it, which thereafter the further transport of the isolated bow. The formation of air cushions between the bottom sheet of the stack of sheets is necessary to relieve the bottom sheet of the weight of the stack. Accordingly, the size or the weight that can be placed on a stack depends on the load-bearing capacity of the air cushion or on the quality of the air cushion formation in the area of the lowest sheet.

Es ist bereits versucht worden, die Qualität der Luftkissenbildung durch die Erhöhung der Blasleistung, d.h. durch Erhöhung der Druckluftzufuhr zu verbessern. Dabei hat sich jedoch gezeigt, daß mit dieser Maßnahme allein eine merkliche Verbesserung der Luftkissenbildung nicht erzielbar ist, weil von den Rändern des Blattstapels zu viel Druckluft entweichen kann, die der Luftkissenbildung verlorengeht.Attempts have already been made to improve the quality of air cushion formation by increasing the blowing power, i.e. improve by increasing the compressed air supply. However, it has been shown that this measure alone does not achieve a noticeable improvement in air cushion formation, because too much compressed air can escape from the edges of the sheet stack and the air cushion formation is lost.

Der Erfindung liegt die Aufgabe zugrunde, einen Bogenanlegetisch der gattungsgemäßen Art mit möglichst einfachen Mitteln bezüglich der Luftkissenbildung derart zu verbessern, daß an den Randzonen des auf dem Bogenalegetisch aufliegenden Blattstapels möglichst wenig Blasluft entweichen kann und somit ein möglichst großer Anteil der aus den Blasdüsen im Bereich der untersten Bogen des Blattstapels auströmenden Druckluft zur Luftkissenbildung beiträgt, sodaß das gebildete Luftkissen in der Lage ist, größere Blattstapel zu tragen.The invention has for its object to improve a sheet feed table of the generic type with the simplest possible means with regard to the formation of air cushions in such a way that as little blowing air as possible can escape at the edge zones of the sheet stack lying on the sheet algae and thus as large a portion as possible from the blowing nozzles in the area the bottom sheet of the stack of sheets compressed air contributes to air cushion formation, so that the formed air cushion is able to carry larger stacks of sheets.

Gelöst wird diese Aufgabe erfindungsgemäß dadurch, daß die zumindest annähernd luftdicht auf der Tischfläche aufsitzenden Bogenanlegeschienen an ihren einander zugekehrten Innenwandflächen in Höhe der Blasdüsen jeweils mit einer nutartigen oder falzartigen Erweiterung versehen sind, die sich zumindest annähernd über die gesamte Anlegelänge erstreckt.This object is achieved according to the invention in that the at least approximately airtight arching rails on the mutually facing inner wall surfaces at the level of the blowing nozzles are each provided with a groove-like or fold-like extension which extends at least approximately over the entire contact length.

Durch das Vorhandensein der nut- oder falzartigen Erweiterungen im Bereich der Blasdüsen ist es möglich, die Innenflächen der Bogenanlegeschienen so eng und dicht an die Längsseiten des Blatt- oder Bogenstapels anzulegen, daß nur sehr geringe Luftmengen der Druckluft nach oben entweichen können. Schon dadurch wird die Luftkissenbildung bei gleicher Druckluftzufuhr derart verbessert, daß die Stapelhöhe um mehr als das Doppelte vergrößert werden kann, ohne daß die Funktion der Blattvereinzelung bzw. der Entnahme des jeweils untersten Bogens beeinträchtigt wird. Dabei trägt auch das dichte Aufsitzen der beiden Bogenanlegeschienen auf der Tischfläche merklich zur Verminderung des Druckluftverlustes und somit zur Verbesserung der Luftkissenbildung bei.Due to the presence of the groove-like or rabbet-like extensions in the area of the blowing nozzles, it is possible to place the inner surfaces of the sheet guide rails so closely and tightly on the long sides of the sheet or sheet stack that only very small amounts of air can escape from the compressed air. This alone improves the air cushion formation with the same compressed air supply in such a way that the stack height can be increased by more than twice without impairing the function of sheet separation or the removal of the bottom sheet in each case. The tight seating of the two sheet guide rails on the table surface also significantly reduces the loss of compressed air and thus improves the air cushion formation.

Eine weitere Verbesserung der Luftkissenbildung wird durch die Ausgestaltung der Erfindung nach Anspruch 2 erzielt. Mit diesen zusätzlichen Maßnahmen kann eine weitere Steigerung der auflegbaren Stapelhöhe erzielt werden.A further improvement in air cushion formation is achieved by the embodiment of the invention according to claim 2. With these additional measures, a further increase in the stackable height can be achieved.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Ansprüche 3 bis 11. Deren Vorteile werden in der nachfolgenden Beispielsbeschreibung näher erläutert. Es zeigt:

  • Fig. 1 einen Bogenanlegetisch in perspektivischer Seitenansicht;
  • Fig. 2 einen Vertikalschnitt durch eine Bogenanlegeschiene;
  • Fig. 3 eine Einzelheit 111 aus Fig. 2 in vergrößertem Maßstab;
  • Fig. 4 eine konstruktiv andere Ausführungsform der Einzelheit 111 aus Fig. 2;
  • Fig. 5 eine zwischen zwei Blasdüsen liegende Schnittansicht der Einzelheit 111 aus Fig. 2;
  • Fig. 6 eine weitere Ausführungsform der Einzelheit 111 aus Fig. 2;
  • Fig. 7 ein Dichtungsband als Einzelteil;
  • Fig. 8 eine Dichtungsleiste im Querschnitt mit Anschlußstutzen;
  • Fig. 9 die Dichtungsleiste im Querschnitt in anderer Anordnung bezüglich der hinteren Bogenstapelkante.
Further advantageous embodiments of the invention are the subject of claims 3 to 11. Their advantages are explained in more detail in the following description of examples. It shows:
  • 1 shows a sheet feed table in a perspective side view;
  • Figure 2 is a vertical section through a sheet feed rail.
  • 3 shows a detail 111 from FIG. 2 on an enlarged scale;
  • FIG. 4 shows a constructively different embodiment of the detail 111 from FIG. 2;
  • 5 shows a sectional view of the detail 111 from FIG. 2 lying between two blowing nozzles;
  • FIG. 6 shows a further embodiment of the detail 111 from FIG. 2;
  • 7 shows a sealing tape as an individual part;
  • 8 shows a sealing strip in cross section with a connecting piece;
  • Fig. 9 shows the sealing strip in cross section in a different arrangement with respect to the rear sheet stacking edge.

Wie am besten aus Fig. 1 erkennbar ist, besteht der in der Zeichnung dargestellte Bogenanlegetisch aus einer rechteckförmigen, horizontalen Tischplatte 1, auf welcher zwei Bogenanlegeschienen 3 und 4 parallel zueinander verlaufend und quer zueinander verstellbar angeordnet sind. Diese Bogenanlegeschienen 3, 4 sind mittels nicht dargestellter Schrauben an der Tischplatte 1 und mittels lösbarer Klemmeinrichtungen an einer Querschiene 5 fixiert, die ihrerseits in seitlich hochstehenden Laschen 6 und 7 der Tischplatte 1 befestigt ist. In einer Ausnehmung des vorderen Tischplattenabschnittes ist unterhalb der Querschiene 5 und parallel zu dieser verlaufend eine Saugwalze 8 drehbar gelagert. Diese Saugwalze 8 ist in bekannter Weise als Hohlzylinder ausgebildet und mit einer Vielzahl von reihenweise angeordneten, radialen Sauglöchern 9 versehen. Im Innern der Saugwalze 8 befindet sich eine in der Zeichnung nicht dargestellte, sektorartig ausgebildete Vakuumkammer, die mit einer Saugpumpe verbunden ist. Die Anordnung der Saugwalze 8 ist so getroffen, daß die obere Tischfläche der Tischplatte 1 zumindest annähernd tangential zur Umfangsfläche der Saugwalze 8 verläuft. Oberhalb der Saugwalze 8 ist eine vertikale Anschlagplatte 10 angeordnet, deren untere Anschlagkante 11 einen etwa der Dicke der zu vereinzelnden Bogen entsprechenden Abstand vom Umfang der Saugwalze 8 aufweist. In Transportrichtung sind in geringem Abstand von der Saugwalze 8 Transportmittel angeordnet, die aus mehreren, auf einer Welle 12 befestigten Transportrollen 13 und zwei Andruckrollen 14 bestehen, welche in Lagergehäusen 15 und 16 drehbar gelagert sind. Aufgabe dieser Transportmittel ist es, jeweils das von der Saugwalze 8 einzeln vom Stapel entnommene unterste Blatt weiterzutransportieren.As can best be seen from FIG. 1, the sheet feed table shown in the drawing consists of a rectangular, horizontal table top 1, on which two sheet feed rails 3 and 4 are arranged parallel to one another and adjustable transversely to one another. This bow attachment rails 3, 4 are fixed by means of screws (not shown) to the table top 1 and by means of releasable clamping devices to a cross rail 5, which in turn is fastened in laterally raised tabs 6 and 7 of the table top 1. A suction roller 8 is rotatably mounted in a recess in the front table top section below the cross rail 5 and parallel to it. This suction roll 8 is designed in a known manner as a hollow cylinder and is provided with a plurality of radial suction holes 9 arranged in rows. Inside the suction roll 8 there is a sector-like vacuum chamber, not shown in the drawing, which is connected to a suction pump. The arrangement of the suction roller 8 is such that the upper table surface of the table top 1 extends at least approximately tangentially to the peripheral surface of the suction roller 8. A vertical stop plate 10 is arranged above the suction roller 8, the lower stop edge 11 of which has a distance from the circumference of the suction roller 8 which corresponds approximately to the thickness of the sheets to be separated. In the transport direction 8 transport means are arranged at a short distance from the suction roller, which consist of several transport rollers 13 and two pressure rollers 14 fastened on a shaft 12, which are rotatably mounted in bearing housings 15 and 16. The task of these transport means is to continue to transport the bottom sheet taken individually from the stack by the suction roller 8.

Die beiden auf der Tischplatte 1 aufsitzenden Bogenanlegeschienen 3 und 4 sind spiegelbildlich zueinander angeordnet und ausgebildet. Wie aus Fig. 2 ersichtlich ist, bestehen sie jeweils aus einem Rechteckrohr 17 dessen Hohlraum 18 am vorderen und hinteren Ende jeweils dicht verschlossen ist. In der Bodenwand 19 des Rechteckrohres 17 sind über die ganze Länge verteilt in regelmäßigen Abständen, die im vorderen Abschnitt kleiner sein können als im übrigen Teil der Bogenanlegeschienen, individuell verschließbare Druckluftventile 20 angeordnet sind. Diese Druckluftventile 20 bestehen jeweils aus einer Ventilsitzhülse 21 und einem Ventilschließteller 22, der mittels eines Schaftes 23 an einem Stellknopf 24 befestigt ist. In der in Fig. 2 dargestellten Schließlage wird der Ventilschließteller 22 mittels einer den Schaft 23 umschließenden Druckfeder 25 dichtend auf die Ventilsitzhülse 21 gepreßt. Das Druckluftventil 20 ist somit geschlossen. Der Stellknopf 24 besitzt eine Scheibe 26 mit zwei sich diametral gegenüberliegend angeordneten Nocken 27, die in entsprechende Ausnehmungen 28 eines Ringbundes 29 einfallen können, wenn das betreffende Druckluftventil 20 geschlossen werden soll. Um das Druckluftventil 20 zu öffnen, wird der Stellknopf relativ zum Ringbund 29 derart gedreht, daß die beiden Nocken 27 auf den oberen Stirnrand 30 des Ringbundes 29 zu liegen kommen und der Ventilschließteller 22 von der Ventilsitzhülse 21 abgehoben wird. In der äußeren Seitenwand 31 des Rechteckrohres 17 befindet sich ein Anschlußnippel 32 für eine Druckluftleitung, durch welche von einer nicht dargestellten Druckluftquelle Druckluft in den Hohlraum 18 gepreßt werden kann. Die untere Bodenfläche 33 des Rechteckrohres 17 ist mit einem angeklebten, aus elastischem Material, z.B. aus Schaumgummi, bestehenden Dichtungsband 34 versehen, welches jeweils an den Stellen, wo sich ein Druckluftventil 20 befindet tunnelförmige (siehe Fig. 7) Ausnehmungen 35 aufweist. Dieses Dichtungsband 34 hat zumindest annähernd die Breite des Rechteckrohres 17 und erstreckt sich über dessen ganze Länge, und es dient dazu, zwischen der Tischplatte 1 und der Bogenanlegeschiene 3 bzw. 4 einen luftdichten Sitz zu erzeugen, der das ungewollte Entweichen von Druckluft verhindert. Die innere Seitenwand 36 des Rechteckrohres 17 ist mit einer nach oben verlängerten Leitwand 37 versehen, deren Höhe etwa der dreifachen Höhe des Rechteckrohres 17 entspricht. Die ganze Innenfläche der inneren Seitenwand 36 und der sich daran nach oben anschließenden Leitwand 37 ist mit einer glatten ebenen Blechplatte 38 verkleidet, die bis zur Höhe der Bodenfläche 33 des Rechteckrohres 17 eine geschlossene, ebene, exakt lotrecht auf der Tischplatte 1 stehende Leitfläche bzw. Ausrichtfiäche für den zwischen den beiden Anlegeschienen 3 und 4 auf der Tischplatte 1 sitzenden Bogen- oder Blattstapel 53 (Fig. 8 und 9) bildet. Unterhalb der Bodenfläche 33 befindet sich eine nutartige oder falzartige Erweiterung 39. Diese nut- oder falzartige Erweiterung 39 kann entweder dadurch gebildet sein, daß die Blechplatte 38, wie in Fig. 3 und 6 dargestellt, in dem zwischen der Bodenfläche 33 des Rechteckrohres 17 und der oberen Tischfläche 1' der Tischplatte 1 liegenden Bereich um etwa die Blechplattendicke d von z.B. 0,5 mm nach außen versetzt ist oder daß einer in Höhe der Bodenfläche 33 des Rechteckrohres 17 endenden Blechplatte 38' eine Winkelschiene 40 hinterlegt ist, deren vertikaler Schenkel 41 in einem seiner Dicke und Höhe entsprechenden Falz 42 der Seitenwand 36 des Rechteckrohres 17 liegt und dessen horizontaler Schenkel 43 auf der Tischfläche 1' der Tischplatte aufliegt, wie das in den Fig. 4 und 5 dargestellt ist. Wie aus Fig. 3 erkennbar ist, besitzt auch die Blechplatte 38 einen einstückig angeformten in die Horizontale abgewinkelten Schenkel 44. Die horizontalen Schenkel 43 und 44 ragen jeweils in den von den beiden Anlegeschienen 3 und 4 seitlich begrenzten Stapelraum hinein. Dadurch, daß der Schenkel 43 einstückig am Schenkel 41 der Winkelschiene 40 angeformt ist bzw. der horizontale Schenkel 44 einstückig mit der Blechplatte 38 verbunden ist, ist sichergestellt, daß zwischen der Tischfläche 1' der Tischplatte 1 und dem die Erweiterung 39 seitlich begrenzenden Wandabschnitt 45 bzw. 46 keine Spaltöffnung vorhanden sein kann, in welcher sich ein Bogen des Stapels verklemmen könnte. In Fig. 6 sitzt die untere Stirnkante des die Erweiterung 39 bildenden Wandabschnittes 45, ohne mit einem horizontalen Schenkel 44 versehen zu sein, direkt auf der Tischfläche 1' der Tischplatte auf. Die vorerwähnte Gefahr, daß sich durch Unebenheiten der Tischfläche 1' spaltartige Zwischenräume bilden, in denen sich die seitlichen Randkanten eines Bogens verfangen können, ist nicht ausgeschlossen.The two sheet contact rails 3 and 4 seated on the table top 1 are arranged and formed in mirror image to one another. As can be seen from Fig. 2, they each consist of a rectangular tube 17 whose cavity 18 is sealed at the front and rear ends. In the bottom wall 19 of the rectangular tube 17, individually closable compressed air valves 20 are arranged over the entire length at regular intervals, which may be smaller in the front section than in the rest of the curved guide rails. These compressed air valves 20 each consist of a valve seat sleeve 21 and a valve closing plate 22 which is fastened to an adjusting button 24 by means of a shaft 23. In the closed position shown in FIG. 2, the valve closing plate 22 is pressed onto the valve seat sleeve 21 in a sealing manner by means of a compression spring 25 surrounding the stem 23. The compressed air valve 20 is thus closed. The adjusting knob 24 has a disk 26 with two diametrically opposed cams 27 which can drop into corresponding recesses 28 of an annular collar 29 when the relevant compressed air valve 20 is to be closed. In order to open the compressed air valve 20, the adjusting knob is rotated relative to the collar 29 in such a way that the two cams 27 come to rest on the upper end edge 30 of the collar 29 and the valve closing plate 22 is lifted off the valve seat sleeve 21. In the outer side wall 31 of the rectangular tube 17 there is a connection nipple 32 for a compressed air line, through which compressed air can be pressed into the cavity 18 by a compressed air source, not shown. The lower bottom surface 33 of the rectangular tube 17 is glued with an elastic material, e.g. made of foam rubber, existing sealing tape 34, which has tunnel-shaped recesses 35 (see FIG. 7) at the points where a compressed air valve 20 is located. This sealing tape 34 has at least approximately the width of the rectangular tube 17 and extends over its entire length, and it is used to produce an airtight seat between the table top 1 and the sheet contact rail 3 or 4, which prevents the unwanted escape of compressed air. The inner side wall 36 of the rectangular tube 17 is provided with an upwardly extended guide wall 37, the height of which corresponds approximately to three times the height of the rectangular tube 17. The entire inner surface of the inner side wall 36 and the guide wall 37 adjoining it at the top is clad with a smooth, flat sheet metal plate 38 which, up to the height of the bottom surface 33 of the rectangular tube 17, has a closed, flat, exactly perpendicular guide surface or Alignment surface for the sheet or sheet stack 53 (FIGS. 8 and 9) seated between the two positioning rails 3 and 4 on the table top 1. Below the bottom surface 33 there is a groove-like or rabbet-like extension 39. This groove-like or rabbet-like extension 39 can either be formed by the sheet metal plate 38, as shown in FIGS. 3 and 6, in between the bottom surface 33 of the rectangular tube 17 and the upper table surface 1 'of the table top 1 area by approximately the plate thickness d of, for example 0.5 mm is offset to the outside or that a sheet metal plate 38 'ending in the level of the bottom surface 33 of the rectangular tube 17 is deposited with an angle rail 40, the vertical leg 41 of which lies in a fold 42 of the side wall 36 of the rectangular tube 17 corresponding to its thickness and height, and whose horizontal leg 43 rests on the table surface 1 'of the table top, as shown in FIGS. 4 and 5. As can be seen from FIG. 3, the sheet metal plate 38 also has an integrally formed leg 44 which is angled into the horizontal. The horizontal legs 43 and 44 each project into the stacking space delimited laterally by the two contact rails 3 and 4. Characterized in that the leg 43 is integrally formed on the leg 41 of the angle rail 40 or the horizontal leg 44 is integrally connected to the sheet metal plate 38, it is ensured that between the table surface 1 'of the table plate 1 and the wall section 45 laterally delimiting the extension 39 or 46 there can be no gap opening in which an arc of the stack could jam. In FIG. 6, the lower end edge of the wall section 45 forming the extension 39 sits directly on the table surface 1 'of the table top without being provided with a horizontal leg 44. The aforementioned risk that gap-like gaps form in the unevenness of the table surface 1 ', in which the lateral edge edges of a sheet can get caught, is not excluded.

Ein weiterer Vorteil dieser Horizontalschenkel besteht darin, daß weil sie nicht luftdicht auf der Tischfläche 1' aufliegen Blasluft unter ihnen hindurch unter das jeweils unterste Blatt des Blattstapels 53 geleitet wird um dort das gewünschte Luftkissen zu bilden.Another advantage of these horizontal legs is that because they do not lie airtight on the table surface 1 ', blown air is passed below them under the bottom sheet of the sheet stack 53 in order to form the desired air cushion there.

Wie aus den Fig. 3 und 4 ersichtlich ist, sind die Wandabschnitte 45 bzw. 46, die seitlich die nutenartigen Erweiterungen 39 begrenzen, mit Durchbrüchen 47 versehen, welche die Blasdüsen bilden und welche durch die Ausnehmungen 35 des Dichtungsbandes 34 jeweils separat mit einem der Druckluftventile 20 in Verbindung stehen. Vorteilhaft ist dabei auch, wenn die zwischen den einzelnen Ausnehmungen 35 liegenden Längskantenabschnitte 35' des Dichtungsbandes möglichst dicht an den Wandabschnitten 45 bzw. 46 anliegen.As can be seen from FIGS. 3 and 4, the wall sections 45 and 46, which laterally delimit the groove-like extensions 39, are provided with openings 47 which form the blow nozzles and which are each separated separately with one of the openings 34 by the sealing tape 34 Compressed air valves 20 are connected. It is also advantageous if the longitudinal edge sections 35 'of the sealing tape lying between the individual recesses 35 lie as close as possible to the wall sections 45 and 46, respectively.

Die Durchbrüche 45 haben eine im wesentlichen rechteckige Form mit einer Höhe von ca. 2 mm und einer Länge von 8 - 10 mm. Durch die Erweiterungen 39, die in beiden Bogenanlegeschienen 3 und 4 in gleicher Weise spiegelbildlich zueinander vorhanden sind, ist es möglich, die beiden Bogenanlegeschienen 3 und 4 jeweils so auf die Breite des zwischen ihnen liegenden Bogenstapels einzustellen, daß zwischen den Innenflächen der Blechplatten 38 und den Längsseiten des Bogenstapels keine Zwischenräume vorhanden sind, durch welche die durch die Blasdüsen 47 zugeführte Druckluft nach oben entweichen kann, daß aber die jeweils untersten Blätter des Blattstapels in Höhe der Erweiterungen 39 jeweils ausreichendes seitliches Spiel haben, um unbehindert von der Saugwalze 8 abgezogen zu werden. Indem das Entweichen der Blasluft entlang der Innenflächen der Blechplatten 38 zumindest weitestgehend verhindert wird, entsteht eine wesentlich effektvollere Luftkissenbildung im unteren Bereich des Blattstapels, d.h. zwischen der Tischplatte und den sich im Bereich der Erweiterung 39 liegenden Bogen bzw. Blätter des Blatt- oder Bogenstapels 53, die einem wesentlich größeren Stapelgewicht standhalten kann, als dies bei den herkömmlichen Anordnung zur Luftkissenbildung möglich war.The openings 45 have an essentially rectangular shape with a height of approximately 2 mm and a length of 8-10 mm. Through the extensions 39, which are present in the same way in mirror image to each other in the two sheet feed rails 3 and 4, it is possible to adjust the two sheet feed rails 3 and 4 to the width of the sheet stack between them in such a way that between the inner surfaces of the sheet metal plates 38 and the longitudinal sides of the sheet stack there are no gaps through which the compressed air supplied through the blowing nozzles 47 can escape upwards, but that the bottom sheets of the sheet stack at the level of the extensions 39 each have sufficient lateral play to be pulled freely from the suction roller 8 will. By at least largely preventing the blowing air from escaping along the inner surfaces of the sheet metal plates 38, a significantly more effective air cushion formation occurs in the lower region of the sheet stack, i.e. between the table top and the sheets or sheets of the sheet or sheet stack 53 lying in the area of the extension 39, which can withstand a much greater stack weight than was possible with the conventional arrangement for forming air cushions.

Damit die Dichungsbänder 34 luftdicht auf der Oberfläche 1' der Tischplatte aufliegen und die durch die Druckluftventile 20 und die die Verbindungskanäle bildenden Ausnehmungen 35 der Dichtungsbänder den einzelnen die Blasdüsen bildenden Durchbrüchen 47 zugeführte Druckluft zwischen den Bogenanlegeschienen 3 und 4 und der Tischplatte 1 nicht entweichen kann, sind nicht dargestellte Verschraubungen vorgesehen, mit denen die Bogenanlegeschienen 3 und 4 bzw. deren Dichtungsbänder 34 fest auf die Tischplatte 1 gepreßt werden können, die jedoch zum seitlichen Verschieben der Bogenanlegeschienen 3 und 4 lösbar sind.So that the sealing tapes 34 lie airtight on the surface 1 'of the table top and the compressed air supplied through the compressed air valves 20 and the recesses 35 of the sealing tapes forming the connecting channels to the individual openings 47 forming the blowing nozzles cannot escape between the sheet contact rails 3 and 4 and the table top 1 , Screws, not shown, are provided, with which the sheet contact rails 3 and 4 or their sealing strips 34 can be pressed firmly onto the table top 1, but which can be detached for laterally displacing the sheet contact rails 3 and 4.

Obwohl bereits durch die luftdichte Auflage der Bogenanlegeschienen 3 und 4 auf der Tischplatte 1 einerseits und durch die im Bereich der Blasdüsen 47 vorgesehenen Erweiterungen 39 bzw. durch die dadurch ermöglichte spielfreie Anlage der Leitwände 37 an den Längsseiten des Bogenstapels eine so starke Verbesserung der Luftkissenbildung erreicht wird, daß gegenüber den herkömmlichen Anordnungen die doppelte bis dreifache Stapelhöhe aufgelegt werden kann, ohne daß die Blattvereinzelung dadurch beeinträchtigt würde, läßt sich eine zusätzliche Verbesserung der Luftkissenbildung im Bereich der unteren Bogen bzw. Blätter des Bogenstapels noch dadurch erzielen, daß auch der hintere Querrand des Blatt- oder Bogenstapels 53 im Bereich seiner untersten Blätter oder Bogen abgedichtet wird. Zu diesem Zweck ist eine sich von Innenfläche zu Innenfläche der Bogenanlegeschienen 3 und 4 erstreckende Dichtungsleiste 48 aus relativ weichem Gummi (z.B. 35° Shore-Härte) oder einem gummiähnlichen Material vorgesehen, die einen flachen, bandartigen Querschnitt mit zwei auf der Unterseite offenen, in Längsrichtung durchgehenden, nutenartigen Hohlräumen 49 und 50 aufweist. Einer dieser nutenartigen Hohlräume 50 ist mit einem winkelförmigen Anschlußstutzen 51 versehen, durch welchen er mittels eines Schlauches 52 an eine Saugpumpe anschließbar ist. Mit Hilfe des im Hohlraum 50 entstehenden Vakuums wird die Dichtungsleiste 48 luftdicht auf die Oberfläche der Tischplatte 1 gepreßt. Dabei besteht die Möglichkeit, die Dichtungsleiste entweder gern. Fig. 8 unmittelbar hinter den Bogenstapel 53 zu setzen oder aber gemäß Fig. 9 so anzuordnen, daß das hintere Ende des Bogenstapels 53 etwa um 1 bis 2 cm auf der Dichungsleiste 48 aufsitzt. Ob die Anordnung gemäß Fig. 8 oder gemäß Fig. 9 getroffen wird, hängt im wesentlichen von der Papierqualität ab. Bei sehr dünnem und elastischem Papier ist es von Vorteil, die Anordnung so zu treffen, wie sie in Fig. 8 angedeutet ist. Bei relativ dickem und steifem Papier kann auch die Anordnung gemäß Fig. 9 gewählt werden. In beiden Fällen ist durch die Dichtungsleiste 48, die in ihrer Länge jeweils auf den Abstand der beiden Bogenanlegeschienen 3 und 4 abzustimmen ist, das Entweichen von Druckluft an der Hinterkante des Bogenstapels so stark vermindert werden, daß die dadurch verbesserte Luftkissenbildung eine weitere Erhöhung der Bogenstapelhöhe bzw. des Bogenstapelgewichtes erlaubt und daß trotzdem die Papiervereinzelung ohne Störung sowohl bei großer Stapelhöhe als auch bei geringster Stapelhöhe bis zum letzten Blatt bzw. Bogen fehlerfrei von statten gehen kann.Although the airtight support of the sheet guide rails 3 and 4 on the table top 1 on the one hand and the extensions 39 provided in the area of the blowing nozzles 47 and the play-free arrangement of the guide walls 37 on the long sides of the sheet stack, which is achieved thereby, achieve such a strong improvement in the formation of air cushions is that compared to the conventional arrangements can be placed twice to three times the stack height without affecting the sheet separation, an additional improvement in air cushion formation in the area of the lower sheets or sheets of the sheet stack can be achieved in that the rear transverse edge the sheet or sheet stack 53 is sealed in the area of its lowermost sheets or sheets. For this purpose, a sealing strip 48 made of relatively soft rubber (for example 35 ° Shore hardness) or a rubber-like material, which extends from the inner surface to the inner surface of the bow contact rails 3 and 4, is provided, which has a flat, band-like cross section with two open on the underside, in Has continuous, groove-like cavities 49 and 50 in the longitudinal direction. One of these groove-like cavities 50 is provided with an angular connecting piece 51, through which it can be connected to a suction pump by means of a hose 52. With the help of the vacuum created in the cavity 50, the sealing strip 48 is pressed airtight onto the surface of the table top 1. It is possible to either like the sealing strip. Fig. 8 immediately behind the sheet stack 53 or to arrange as shown in FIG. 9 so that the rear end of the sheet stack 53 sits about 1 to 2 cm on the sealing strip 48. Whether the arrangement according to FIG. 8 or according to FIG. 9 is made depends essentially on the paper quality. In the case of very thin and elastic paper, it is advantageous to make the arrangement as indicated in FIG. 8. In the case of relatively thick and stiff paper, the arrangement according to FIG. 9 can also be selected. In both cases, the leakage of compressed air at the trailing edge of the sheet stack can be reduced so much by the sealing strip 48, the length of which is to be coordinated in each case with the distance between the two sheet contact rails 3 and 4, that the air cushion formation thereby improved further increases the sheet stack height or the sheet stack weight allowed and that the paper separation can still be carried out without errors both at large stack heights and at the lowest stack heights up to the last sheet or sheet.

Es versteht sich, daß für unterschiedlich breite Bogen- oder Blattstapel 53 auch unterschiedlich lange Dichtungsleisten 48 erforderlich sind. Dabei sollten die Längen der Dichtungsleisten etwa 3 bis 5 mm größer gewählt werden als der jeweils auf die Stapelbreite abgestimmte Abstand der beiden Bogenanlegeschienen 3 und 4, damit die Enden der Dichtungsleiste 48 möglichst direkt auch an den Innenseiten der Bogenanlegeschienen 3, 4 bzw. in deren Erweiterungen 39 liegen.It goes without saying that sealing strips 48 of different lengths are also required for sheets or sheets 53 of different widths. The lengths of the sealing strips should be chosen to be about 3 to 5 mm larger than the spacing of the two arch contact rails 3 and 4, which is matched to the stack width, so that the ends of the sealing strip 48 are as directly as possible also on the inside of the arch contact rails 3, 4 or in their Extensions 39 are.

Claims (11)

1. Sheet feeder table having two parallel sheet feeder bars (3, 4) adjustable in respect of each other and which have on their mutually facing sides and above the table surface (1') a plurality of blower jets (47) which are connected to a common source of compressed air and comprising a singling-out device (8) by which the extreme bottom sheet of a stack of sheets at any given time is withdrawn from the stack which can be topped up from above, characterised in that the sheet feeder rails (3, 4) which are seated at least approximately airtightly on the table surface (1') are, on their mutually facing inner wall surfaces, at the level of the blower jets (47), each provided with a groove-like or rebate-like widened out portion (39) which extends at least approximately over the entire length of the feeder.
2. Sheet feeder table according to Claim 1, characterised in that for sealing the rear transverse edge of the stack of sheets, a sealing strip (48) is provided which extends from the inside face of one sheet feeder rail to the inside face of another (3, 4) and which directly defines the rear edge of the stack of sheets or which is so disposed that the rear end of the stack of sheets is seated on it.
3. Sheet feeder table according to Claim 1 or 2, characterised in that the two sheet feeder rails (3, 4) consist in each case of rectangular tubes (17) which on their flat bottom surfaces (33) are provided with a resilient sealing strip (34) of rubber, foam rubber or the like, which rests on the table surface (11).
4. Sheet feeder table according to one of Claims 1 to 3, characterised in that the blower jets are in each case constituted by apertures (47) which are disposed in the region of the sealing strip (34) in a portion (45, 46) of wall which projects downwardly beyond the bottom face (33) of the sheet feeder rail (3, 4), the wall portion (45, 46) being at the same time the boundary face of the groove-like or rebate-like widened portion (39), portions (35) of the sealing strip (34) which are disposed behind the individual apertures (47) in the wall portion (45, 46) forming connecting ducts to compressed air valves (20) disposed in the bottom (19) of the sheet feeder rail (3, 4).
5. Sheet feeder table according to Claim 4, characterised in that the apertures (47) which form the blower jets have in each case an elongated form with a height of 1 to 3 mm and a length of 8 to 10 mm.
6. Sheet feeder according to one of Claims 1 to 5, characterised in that the portion of wall (45, 46) which contains the blower jets (47) is provided with an integrally moulded-on thin-walled angular leg (43, 44) which rests flat on the table surface (1'), projecting inwardly.
7. Sheet feeder according to Claim 3, characterised in that the sheet feeder rails (3, 4) are in each case provided with vertical guide walls (37) which are at least twice the height of a rectangular tube (17), their mutually facing inside surfaces carrying smooth and plane sheet metal plates (38).
8. Sheet feeder table according to Claim 6 or 7, characterised in that the wall portion (45) containing the blower jets (47) and the horizontal angular leg (44) are in each case moulded in one piece on the sheet metal plate (38).
9. Sheet feeder table according to Claim 6 or 7, characterised in that the wall portion (46) which contains the blower jets (47) is a constituent part of an angled rail (40), the vertical member (41) of which lies in a rebate (42) of the sheet feeder rail (3, 4) which corresponds to its thickness and of which the horizontal member (43) rests on the table surface (1') and in that the straight horizontal bottom edge of the sheet metal plate (38') forms the upper edge of the groove-like widened part (39).
10. Sheet feeder according to Claim 9, characterised in that the widened part (39) corresponds to the thickness of the sheet metal plate (38') of about 0.5 mm.
11. Sheet feeder according to Claim 2, characterised in that the sealing strip (47) has the cross-sectional form of a flat rectangle with, open on the underside, at least one longitudinally continuous groove-like cavity (49, 50) which can be connected to a vacuum pump.
EP87105845A 1986-04-30 1987-04-21 Sheet feeder table with blast nozzles Expired EP0243852B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87105845T ATE44710T1 (en) 1986-04-30 1987-04-21 FEED TABLE WITH BLOW NOZZLES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3614623 1986-04-30
DE3614623A DE3614623C1 (en) 1986-04-30 1986-04-30 Bow feed table with blow nozzles

Publications (2)

Publication Number Publication Date
EP0243852A1 EP0243852A1 (en) 1987-11-04
EP0243852B1 true EP0243852B1 (en) 1989-07-19

Family

ID=6299855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105845A Expired EP0243852B1 (en) 1986-04-30 1987-04-21 Sheet feeder table with blast nozzles

Country Status (5)

Country Link
US (1) US4787619A (en)
EP (1) EP0243852B1 (en)
JP (1) JPS62259930A (en)
AT (1) ATE44710T1 (en)
DE (1) DE3614623C1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6095513A (en) * 1998-12-16 2000-08-01 Pitney Bowes Inc. Hi-speed sheet feeder
US6189883B1 (en) 1998-12-16 2001-02-20 Pitney Bowes Inc. Hi-speed pneumatic sheet feeder
US6244584B1 (en) 1998-12-16 2001-06-12 Pitney Bowes Inc. High speed pneumatic document input system
US6305680B1 (en) 1999-05-12 2001-10-23 Pitney Bowes Inc. System and method for providing document accumulation sets to an inserter system
US6773006B2 (en) 2001-10-24 2004-08-10 Pitney Bowes Inc. Pneumatic apparatus with removable vacuum shoe
EP3932839A1 (en) * 2020-07-02 2022-01-05 Canon Production Printing Holding B.V. Paper input module for a printing apparatus

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19294C (en) * JOS. NEPP in Prenzlau Innovations in retort furnaces for bone charcoal
US2806696A (en) * 1955-05-17 1957-09-17 Deritend Eng Co Mechanism for feeding cardboard or the like from a pile or stack
US3099442A (en) * 1961-04-11 1963-07-30 American Can Co Method and apparatus for feeding sheet material
NL295216A (en) * 1962-07-12 1900-01-01
SE355554B (en) * 1971-08-24 1973-04-30 Galco Dux Ab
US3934869A (en) * 1973-12-20 1976-01-27 Xerox Corporation Sheet separating and feeding apparatus
US4014537A (en) * 1975-11-28 1977-03-29 Xerox Corporation Air floatation bottom feeder
GB2135976A (en) * 1983-02-07 1984-09-12 Coban Design Ass A loading table for a bottom feed conveyor of sheet manipulating apparatus
DE3447331A1 (en) * 1984-12-24 1986-06-26 Mathias Bäuerle GmbH, 7742 ST. Georgen PNEUMATIC BOW FEEDER

Also Published As

Publication number Publication date
ATE44710T1 (en) 1989-08-15
EP0243852A1 (en) 1987-11-04
JPS62259930A (en) 1987-11-12
DE3614623C1 (en) 1987-10-22
US4787619A (en) 1988-11-29

Similar Documents

Publication Publication Date Title
DE4416286C2 (en) Device for adjusting the negative pressure in a suction belt feed table of a sheet feeder
DE2544566C3 (en) Sheet delivery for sheet-fed printing machines
EP0454011A2 (en) Device for conveying a stream, especially a scaled stream of sheets
DE3710994A1 (en) SUCTION HEAD WITH VACUUM CLEANERS
DE2065252B2 (en) Device for separating sheets from a stack of sheets
EP0243852B1 (en) Sheet feeder table with blast nozzles
DE3143762A1 (en) "PAPER FEEDING DEVICE FOR A ROTARY PRESS PRESS"
DE69114761T2 (en) Sheet feeder.
DE1139513B (en) Device for separating stacked blanks made of cardboard or the like.
DE102005016783B4 (en) sheet brake
DE102017210247B4 (en) Sheet feeder for a printing press
EP0386470B1 (en) Device for requesting sheet length in a sheet-processing machine, particularly in a printing machine sheet rotary
DE4105966C1 (en)
EP0265418B1 (en) Paper web guide for a printer
DE2326929B2 (en) Device for feeding cardboard boxes and the like
DE4220396A1 (en) Sheet guide device for sheet delivery unit with leading edge separator - has suction belt with lateral guide plates placed between spaced suction members for smooth handling of flimsy sheets
EP1475326B1 (en) Sheet alignment apparatus provided with an air blast hold down apparatus
DE19729088B4 (en) Sheet conveying device in off or investors of printing presses
DE102017210248B4 (en) Sheet feeder for a printing press
AT500399B1 (en) CONVEYING TABLE, ESPECIALLY A SAUCE TABLE TO TRANSMIT ARC-PRINTED PRINT
DE8714640U1 (en) Sheet sorter
DE524643C (en) Folding machine
DE628025C (en) Folding machine for folding sheets of paper
DE102017208091B4 (en) Sheet feeding device for a printing press
DE29502103U1 (en) Device for the individual removal of sheets or the like. from a stack

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19871210

17Q First examination report despatched

Effective date: 19880929

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 44710

Country of ref document: AT

Date of ref document: 19890815

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO TORTA SOCIETA' SEMPLICE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930415

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930416

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930426

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19930429

Year of fee payment: 7

Ref country code: BE

Payment date: 19930429

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930430

Year of fee payment: 7

Ref country code: FR

Payment date: 19930430

Year of fee payment: 7

Ref country code: AT

Payment date: 19930430

Year of fee payment: 7

EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940421

Ref country code: GB

Effective date: 19940421

Ref country code: AT

Effective date: 19940421

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940422

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940430

Ref country code: CH

Effective date: 19940430

Ref country code: BE

Effective date: 19940430

BERE Be: lapsed

Owner name: MATHIAS BAUERLE G.M.B.H.

Effective date: 19940430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19941101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940421

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19941229

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 87105845.9

Effective date: 19941110

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050421