(19)
(11) EP 0 343 001 B1

(12) EUROPEAN PATENT SPECIFICATION

(45) Mention of the grant of the patent:
12.01.1994 Bulletin 1994/02

(21) Application number: 89305087.2

(22) Date of filing: 19.05.1989
(51) International Patent Classification (IPC)5B65H 3/04, B65H 1/06, B65H 7/14

(54)

Multiple stage dispenser

Mehrfachausgabegerät für Karten

Distributeur multiple pour des cartes


(84) Designated Contracting States:
DE FR GB

(30) Priority: 20.05.1988 US 196477

(43) Date of publication of application:
23.11.1989 Bulletin 1989/47

(73) Proprietor: Long, John Albert
Scarborough Ontario, M1S 1A8 (CA)

(72) Inventor:
  • Long, John Albert
    Scarborough Ontario, M1S 1A8 (CA)

(74) Representative: Curtis, Philip Anthony 
Eric Potter & Clarkson St. Mary's Court St. Mary's Gate
Nottingham NG1 1LE
Nottingham NG1 1LE (GB)


(56) References cited: : 
DE-A- 2 309 756
DE-A- 3 214 350
DE-A- 2 719 358
US-A- 4 651 983
   
       
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] This invention relates to the high speed feeding of cards or like paper material from a stack of such cards to a dispensing station.

    [0002] In my United States Patent No. 3,908,983 issued September 30, 1975, I described a device for feeding single blank cards at high speed into a machine for scoring, folding, stacking or otherwise handling such cards. In the operation of that device a stack of cards is placed between a guide bar and a retainer plate which hold the stack sloping downwardly in a forward direction with the lower cards of the stack being fanned forwardly above an endless belt. As the belt moves, the lowest card of the stack is drawn through the gap between the belt and a friction wheel which rotates slowly to allow the cards to move singly through the gap. The belt and friction wheel are driven by the same motor with suitable gear reduction.

    [0003] In my later United States Patent No. 4,651,983 issued March 24, 1987 I describe a device for controlling the rate of issuance of the cards in my US Patent No. 3,908,983.

    [0004] In operation the above-mentioned devices will misfeed on occasion, i.e. a gap will appear between two sequentially fed cards.

    [0005] DE-A-2309756 discloses a top stack feeder operable to deliver sheets to a dispensing position. The stack feeder is disposed upstream of two independently actuatable conveyors, which are operable to stop at regular intervals, even under continuous demand conditions. Each conveyor is designed to accommodate one sheet per belt and hence a gap appears between two sequentially fed sheets.

    [0006] It is an object of the present invention to provide a method and device whereby the incidence of misfeeding of cards in a card feeding machine is reduced.

    [0007] Essentially the invention, which is defined in the appended claims, consists of a method and apparatus for delivering cards or like paper stock fed singly from a stack feeder of the cards to a demand location for dispensing in sequence, in which each card fed from the stack is advanced through a plurality of stages of a conveyor, each stage being independently operable, each stage and all preceding stages and the stack feeder being actuable when no card is present at that stage, the leading stage being also operable to deliver a card on demand, the cards being fed through the stages at a higher rate than the dispensing rate.

    [0008] An example embodiment of the invention is shown in the accompanying drawings in which:

    Figure 1 is a perspective view of a dispenser;

    Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1;

    Figure 3 is a diagrammatic side elevational view of the device of Figure 1 in operation; and

    Figure 4 is a view similar to Figure 3 showing the operation of the device with a misfeed.



    [0009] The example embodiment shown in the drawings consists of a dispenser 10 which comprises a feeder 12 and a movable platform or conveyor 14, both mounted on a fixed frame 16.

    [0010] Feeder 12 is described in my aforementioned United States patent No. 3,908,983. Conveyor 14 consists of three stages 18A, 18B and 18C; stage 18A serving as a demand location for dispensing cards to a subsequent system not shown. Each stage 18 consists of an upper endless belt unit 20 carried by a pair of rollers 22 and a lower endless belt unit 24 carried by a pair of rollers 26, the belts being spaced one from the other to form a gap 28. In the example embodiment belt unit 24 has a plurality of parallel bands 29 but other means much as a vacuum belt could be used. As seen in Figure 2, rollers 22 and 26 are mounted on shafts 30 and 32 respectively which are rotatable on frame 16 and are interconnected by axle proximity adjustment screws 32, shaft 30 being movable radially at each end in slots 34 in frame 16 to adjust the width of gap 28. Belts 20 and 24 of stage 18A are chain driven by a drive motor 36A and belts 20 and 24 of stage 18B are chain driven in the same manner by a drive motor 36B. Belts 20 and 24 of stage 18C are driven through a gear train 38 from a chain drive 36C which operates an endless movable feeder platform 40 of feeder 12. Each stage 18 has a photoelectric unit 42 bridging gap 28 between belts 20 and 24 adjacent the forward end of the stage and each photocell unit is electrically connected independently to its associated drive motor 36 of the same stage as seen in Figure 4 of the drawings. Drive motors 36A, 36B and 36C are electrically interconnected whereby drive motors 36B and 36C are slaves to drive motor 36A and drive motor 36C is also slave to drive motor 36B.

    [0011] Feeder 12 consists of movable feeder platform 40 and a rotatable friction wheel 44 mounted on frame 16 above the platform with a gap 46 therebetween. A guide bar 48, mounted on a forwardly projecting plate 50, is located above platform 40 and tangential to friction wheel 44 and an adjustable retainer bracket 52, spaced behind guide bar 48, is also mounted on frame 16.

    [0012] In the operation of the device, a stack 60 of cards is placed between guide bar 48 and retainer bracket 52 to rest on platform 40. As platform 40 is moved, the bottom or first card 62 in stack 60 advances through gap 46 and into gap 28 of stage 18C of conveyor 14, followed at a uniformly predetermined distance by the second and subsequent cards in the stack, as seen in Figure 3 of the drawings.

    [0013] When card 62 reaches the position in stage 18A in the path of photocell unit 42A and the demand location is satisfied, i.e. when conveyor 14 is capable of delivering a card on demand then a signal from the photocell stops drive motor 36A. However, drive motor 36B continues to operate until a card 62 reaches photocell unit 42B to stop drive motor 36B. Notwithstanding the mode of stages 18A and 18B (moving or stationary), drive motor 36C continues to drive feeder 12 and stage 18C until stopped by the interposition of a card 62 in the path of photocell unit 42C. Also the feed rate of cards from drive feeder 12 and through the stages 18C,18B and 18A, when actuated, exceeds the output expected from demand location 18A.

    [0014] From this manner of operation it will be seen that the dispensing of cards in timed sequence from a demand location is enhanced because it allows cards to advance and fill gaps in the feed sequence while the leading card is temporarily resting at the demand location.

    [0015] In the example embodiment shown in the drawings an additional card 62 is shown between photocell units 42A and 42B and also between units 42B and 42C but this has no effect on the operation of the device, merely providing additional cards for the demand location.

    [0016] The term "card" used herein includes any flat paper stock or like products.


    Claims

    1. Method of delivering cards (62) or like paper stock to a demand location (18A) for dispensing in timed sequence therefrom, comprising the steps of:
       feeding cards singly from a stack feeder (12) through a plurality of conveyor stages (18B,18C) to a final stage (18A) constituting a demand location;
       for each stage (18A, 18B, 18C) of the conveyor, actuating the stage when no card (62) is present at a predetermined position in that stage, and for the final stage (18A) of the conveyor, also actuating the final stage to dispense cards (62) therefrom in timed sequence,
       characterised in that:
       the method is carried out by an apparatus comprising a bottom stack feeder (12) which is operated together with the first stage (18C) of the conveyor, and the feed rate of cards from the feeder (12) is higher than the rate of dispensing cards from the final stage (18A), and
       in that the method includes the further step of:
       when no card (62) is present at said predetermined position in a given stage (18A,18B,18C), simultaneously activating each preceding stage.
     
    2. A method as claimed in claim 1, wherein the step of, for each stage (18B,18C) of the conveyor, actuating the stage when no card (62) is present at a predetermined position comprises actuating the stage when a photoelectric sensor (42A,42B,42C) does not sense the presence of a card at the stage.
     
    3. An apparatus for delivering cards (62) or like paper stock to a demand location (18A) for dispensing in timed sequence therefrom, comprising:
       a stack feeder (12):
       a conveying means (14) having an input end to receive cards (62) fed from the stack feeder (12) and an output end constituting a demand location (18A), the conveyor means comprising a plurality of sequential stages (18A,18B,18C) each having independently operable drive means (36A,36B,36C), and
       means (42A,42B,42C) to sense the presence of a card at a predetermined position in each stage (18A,18B,18C) characterised in that:
       the stack feeder is a bottom stack feeder (12) which is operable, with the first stage (18C) of the conveyor means, to feed the cards (62) at a higher rate than the rate of dispensing the cards from the demand location (18A), and in that:
       the apparatus further comprises means operable, when a card is not present at said predetermined position, simultaneously to actuate the drive means (36A,36B,36C) of all preceding stages, together with the stack feeder (12).
     
    4. Apparatus as claimed in claim 3 in which the means to sense the presence of a card (62) at each stage (18A,18B,18C) comprises photoelectric means (42A,42B,42C).
     
    5. Apparatus as claimed in claim 4 in which the drive means comprises an independent electric drive motor (36A,36B,36C) associated with each stage (18A,18B,18C) and with the stack feeder (12), the photoelectric means (42A,42B,42C) at each stage being electrically connected to the drive motor at said stage, to the drive motors of each preceding stage, and to the stack feeder (12).
     


    Ansprüche

    1. Verfahren zur Übergabe von Karten (62) oder ähnlichem Papiermaterial an eine Abgabestation (18A) zur zeitlich gesteuerten Abfolge der Abgabe von dieser aus, mit den Verfahrensschritten
       des Zuführens von Karten einzeln von einer Schacht-Speiseeinrichtung (12) ausgehend über eine Vielzahl von Transportband-Stationen (18B, 18C) zu einer End-Station (18A), die die Abgabestation bildet,
       bei allen Stationen (18A, 18B, 18C) des Transportbandes, des Einschaltens jeder Station wenn keine Karte (62) an einer vorbestimmten Stelle der jeweiligen besagten Station vorhanden ist, und für die End-Station (18A) des Transportbandes, des Einschaltens der End-Station (18A), um von dieser Karten (62) in einer zeitlich gesteuerten Abfolge abzugeben,
    dadurch gekennzeichnet,
       daß das Verfahren mit einer Vorrichtung durchführbar ist, die eine Unterzug-Speiseeinrichtung (12) aufweist, die mit der ersten Station (18C) des Transportbandes zusammenwirkt, und daß die Zuführrate der Karten aus der Schacht-Speiseeinrichtung (12) größer als die Abgaberate der Karten aus der End-Station (18A) ist, und
       daß das Verfahren den weiteren Verfahrensschritt umfaßt
       daß, wenn keine Karte (62) an der besagten vorbestimmten Stelle in einer vorgegebenen Station (18A, 18B, 18C) vorhanden ist gleichzeitig jede vorangehende Station eingeschaltet wird.
     
    2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Verfahrensschritt, daß für jede Station (18B, 18C) des Transportbandes, wenn keine Karte (62) an einer vorbestimmten Stelle vorhanden ist, diese Station eingeschaltet wird, das Einschalten dieser Station umfaßt, wenn ein photo-elektrischer Sensor (42A, 42B, 42C) kein Vorhandensein einer Karte an der Station erfaßt.
     
    3. Vorrichtung zur Übergabe von Karten (62) oder ähnlichem Papiermaterial an eine Abgabestation (18A) zur zeitlich gesteuerten Abfolge der Abgabe von dieser aus:
       mit einer Schacht-Speiseeinrichtung (12),
       mit Transportband-Mitteln (14) mit einem Eingabeende zur Aufnahme von Karten (62), die von der Schacht-Speiseeinrichtung (12) angeliefert werden, und mit einem Ausgabeende, welches eine Abgabestation (18A) bildet, wobei die Transportbandmittel eine Vielzahl von sequentiell angeordneten Stationen (18A, 18B, 18C) umfassen, die jeweils getrennt steuerbare Antriebe (36A, 36B, 36C) aufweisen, und
       mit Mitteln (42A, 42B, 42C), um das Vorhandensein einer Karte an einer vorbestimmten Stelle in jeder Station (18A, 18B, 18C) festzustellen, dadurch gekennzeichnet,
       daß die Schacht-Speiseeinrichtung eine Unterzug-Speiseeinrichtung (12) ist, die zusammen mit der ersten Station (18C) des Transportbandes betätigbar ist, um Karten in eine schnelleren Abfolge einzuspeisen, als die Abgabe der Karten von der End-Station (18A) aus erfolgt, und
       daß die Vorrichtung weiterhin Mittel umfaßt, die, wenn eine Karte nicht an der besagten vorbestimmten Stelle vorhanden ist, gleichzeitig die Antriebsmittel (36A, 36B, 36C) alle vorangehenden Stationen zusammen mit der Schacht-Speiseeinrichtung (12) einschaltet.
     
    4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Mittel zur Erfassung des Vorhandenseins einer Karte (62) an jeder Station (18A, 18B, 18C) photo-elektrische Mittel (42A, 42B, 42C) umfaßt.
     
    5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Antriebsmittel einen unabhängigen elektrisch angetriebenen Motor (36A, 36B, 36C) umfassen, der jeder Station (18A, 18B, 18C) und der Schacht-Speiseeinrichtung (12) zugeordnet ist, und daß die photo-elektrischen Mittel (42A, 42B, 42C) an jeder Station elektrisch mit dem Antriebsmotor an dieser Station, mit den Antriebsmotoren an allen vorangehenden Stationen und mit der Schacht-Speiseeinrichtung (12) verbunden sind.
     


    Revendications

    1. Procédé de délivrance de cartes (62), ou d'un matériau en papier analogue, à un emplacement de demande (18A) pour les distribuer en séquence cadencée depuis ce dernier, comprenant les étapes :
       d' amenée une par une des cartes depuis un chargeur à empilement (12), en passant par une pluralité de postes de transport (18B, 18C) , vers un poste final (18A) constituant un emplacement de demande,
       dans chaque poste (18A, 18B, 18C) de transport actionnement du poste lorsqu'aucune carte (62) n'y est présente dans une position prédeterminée et pour le poste final (18A), d' actionnement également de ce poste final pour distribuer les cartes (62) en séquence cadencée depuis ce dernier,
       caractérisé en ce qu'il est
       est mis en oeuvre au moyen d'un appareil comprenant un chargeur à empilement inférieur (12), qui est actionné conjointement avec le premier poste (18C) de transport , la cadence d'amenée des cartes depuis ce chargeur (12) étant supérieure à la cadence de distribution depuis le poste final (18A),
       et en ce qu'il comprend l'étape supplémentaire
       d' actionnement simultané de chaque poste précédent, produit lorsqu'aucune carte (62) n'est présente dans ladite position prédéterminée, dans un des postes (18A, 18B, 18C).
     
    2. Procédé selon la revendication 1 dans lequel, pour chaque poste (18B, 18C) de transport, l'étape d'actionnement du poste lorsqu'aucune carte (62) n'est présente dans une position prédéterminée, comprend l'actionnement de ce poste lorsqu'un capteur photoélectrique (42A; 42B, 42C) ne détecte pas la présence d'une carte dans celui-ci.
     
    3. Appareil pour distribuer des cartes (62) ou un matériau en papier analogue vers un emplacement de demande (18A) pour les distribuer en séquence cadencée depuis ce dernier, comprenant :
       un chargeur à empilement (12),
       un moyen de transport (14), présentant une extrémité d'entrée pour recevoir des cartes (62) amenées depuis le chargeur à empilement (12) et une extrémité de sortie constituant un emplacement de demande (18A), le moyen de transport comprenant une pluralité de postes en succession (18A, 18B, 18C), présentant chacun un moyen d'entraînement (36A, 36B, 36C) susceptible d'être actionné de façon séparée et
       des moyens (42A, 42B, 42C) pour détecter la présence d'une carte dans une position prédéterminée dans chaque poste (18A, 18B, 18C), caractérisé en ce que :
       le chargeur à empilement est un chargeur débitant pas le bas (12), qui peut être actionné avec le premier poste (18C) du moyen de transport, pour amener les cartes (62) à une cadence supérieure à la cadence de distribution des cartes depuis l'emplacement de demande (18A),
       en ce qu'il comprend en outre des moyens pouvant être actionnés lorsqu'aucune carte n'est présente dans ladite position prédéterminée, pour actionner simultanément le moyen d'entraînement (36A, 36B, 36C) de tous les postes précédents, conjointement avec le chargeur à empilement (12).
     
    4. Appareil selon la revendication 3, dans lequel le moyen pour détecter la présence d'une carte (62) sur le poste (18A, 18B, 18C) comprend un moyen photoélectrique (42A, 42B, 42C).
     
    5. Appareil selon la revendication 4, dans lequel le moyen d'entraînement comprend un moteur électrique (36A, 36B, 36C) indépendant, associé à chaque poste (18A, 18B, 18C) et au chargeur à empilement (12), le moyen photoélectrique (42A, 42B, 42C) de chaque poste étant relié électriquement au moteur d'entraînement dudit poste, aux moteurs d'entraînement de chaque poste précédent et au chargeur à empilement (12).
     




    Drawing