EP0839671B1 - Device for binding sheets by heating - Google Patents

Device for binding sheets by heating Download PDF

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Publication number
EP0839671B1
EP0839671B1 EP96810673A EP96810673A EP0839671B1 EP 0839671 B1 EP0839671 B1 EP 0839671B1 EP 96810673 A EP96810673 A EP 96810673A EP 96810673 A EP96810673 A EP 96810673A EP 0839671 B1 EP0839671 B1 EP 0839671B1
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EP
European Patent Office
Prior art keywords
heating
switch
switched
comparator
temperature
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP96810673A
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German (de)
French (fr)
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EP0839671A1 (en
Inventor
Wolfgang Weiffenbach
Kurt Leute
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Ibico Trading GmbH
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Ibico Trading GmbH
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Publication date
Application filed by Ibico Trading GmbH filed Critical Ibico Trading GmbH
Priority to EP96810673A priority Critical patent/EP0839671B1/en
Priority to DE59608325T priority patent/DE59608325D1/en
Priority to US08/944,285 priority patent/US5910263A/en
Publication of EP0839671A1 publication Critical patent/EP0839671A1/en
Application granted granted Critical
Publication of EP0839671B1 publication Critical patent/EP0839671B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42CBOOKBINDING
    • B42C9/00Applying glue or adhesive peculiar to bookbinding
    • B42C9/0056Applying glue or adhesive peculiar to bookbinding applying tape or covers precoated with adhesive to a stack of sheets

Definitions

  • the present invention relates to a device for binding Scroll by heating according to the preamble of the claim 1.
  • a device of this type is, for example, from EP-B1-0 508 945 known.
  • This device includes an elongated electrical heater, the length of the length of an elongated opening of the Device corresponds and a switching device to an electrical Activate circuit at the moment of inclusion is placed on the heater.
  • the heating device itself comprises PTC thermistor elements and is therefore self-regulating.
  • a computer is provided with which the Width of the inserted in the opening between the support members Envelopes can be scanned and with which depending on it the switch-on time of the timer for the heating element can be set is.
  • Such devices can be manufactured in an excellent manner of book covers, brochures and the like or the like Works are used in that the back of a Loose-leaf stacks using a thermoplastic acting adhesive while heating against the back of a Folder is glued, the sheets of paper, cardboard, Plastic and / or the like can be. Such devices are of course also suitable to stick two or several sheets under and / or with the back of a pencil case to enable.
  • the device shown in Figures 1 and 2 has a base body 1 with an octagonal cross-section.
  • a cable connection 2 At the front of the Base body 1 are a cable connection 2, a switch 3 and a Control panel 4 available.
  • the base body 1 points to the upper one Side an elongated slot 5, the width at least corresponds approximately to the width of a heating device 6, which is a heat-conducting rail 7, preferably made of aluminum, includes.
  • the base body is at least two supports fixed at a distance for an elongated laterally pivotable flap 10 and a Switch 11 arranged, the via a movable pin 12 at Swiveling the flap 10 is actuated.
  • a spring 13 By a spring 13 is the flap 10 is held in an elevated position, in which the Switch 11 is not turned on.
  • the heating device 20 comprises one elongated metal rail 21, preferably made of aluminum, with a approximately U-shaped cross section, as shown in Figure 4.
  • a ceramic support 22 arranged, preferably over a relatively thin Layer-forming thermal adhesive 23 with the flat side the rail 21 is glued.
  • the ceramic carrier 22 preferably carries two via a fuse 26 resistors 24, 25 connected in series. Resistors 24, 25 have two connections A1, A2 for the heating current. On the resistance 24 is a temperature sensor or sensor 27 with two connections B1, B2 arranged, preferably at a distance from one end of the rail, which is approximately equal to 1/3 of the length is the rail 21, which has two legs 28, 29, the Leg 28 is shorter than the other. The leaves to be bound are inserted vertically in the area between the legs 28 and 29. The resistance masses are through a glass insulation 30 protected.
  • the switch 11 (Fig. 2) and the heater 20 is shown with the sensor 26.
  • the Switch 11 is via the series connection of the heating device 20 and a switch 31 connected to earth.
  • One at the switch 11 connected rectifier 32 supplies the current for two Comparators 33, 34 and for a lamp 35, preferably a Illuminated field or a red LED lamp, which over another Switch 36 is connected to earth.
  • the electronics include one OR link 37, the input side with one output each Comparators 33, 34 is connected, and their output signal for Control of the switch 36 is used. Comparators 33 and 34 are acted upon by the output signal of the sensor 26.
  • the Reference voltage input of the comparator 33 is connected to the Output of the rectifier 32 connected reference voltage circuit 38, which is preferably a voltage divider, connected.
  • the reference voltage input of the comparator 34 is on the output of the rectifier 32 connected locking circuit or latch 39 connected to the output of the comparator 34 is fed back.
  • the rising temperature curve depends on the constant mass of the rail and the mass of the inserted leaves, which can fluctuate.
  • the glue begins to become liquid; this corresponds to time T3 (signal b).
  • T3 signal b
  • T min a time at which a time T2 is a predetermined T min .
  • the comparator 33 becomes active and emits a signal "1", which is of no importance per se for the heating process.
  • the reference voltage of the comparator 34 is predetermined such that its output signal "0" and the switch 31 (signal h) are switched off at a sensor temperature T max . This corresponds to time T4 in FIG. 6. The temperature drops as the device cools naturally. As long as T> T min , the comparator 33 outputs an output signal "1" and the switch 36 remains closed, that is to say the lamp 35 burns until T ⁇ T min . Then, that is to say at time T5 (FIG. 6), it goes out.
  • the switch 31 remains open, even if T ⁇ T max , so that the heating effect only lasts from time T1 to time T4. During this time, the energy consumption (curve e, Fig. 6) is greatest.
  • the device remains switched on as long as sheets are inserted in the device remain that over the depressed flap 10 (course k, Fig. 6) keep the main switch 11 closed. After removal of the bound leaves the stream is interrupted Latch circuit loses its effect, for example by discharging a capacitor, and the process can start from Start at the beginning, with the immediately following binding the Process time or binding time becomes shorter because of the heating device is still a little warm.
  • the temperature gradient becomes correspondingly smaller due to the inertia of the system (FIG. 13), that is to say the time T5-T3 becomes longer, and the heating device 20 remains switched on longer, which is desirable given the large folder thickness; this automatically results in the necessary duration of the heating process depending on the folder thickness. Since the process is controlled via T max and T min , the binding time is automatically adjusted.
  • the energy consumption is zero during the waiting times.
  • the folder can be removed as soon as the lamp 35 is no longer burns because then the process is complete.
  • the folder may however, continue to stay in the device, for example if you use them forgets because the heating is switched off and therefore the folder cannot be damaged by overheating.
  • a narrow pivoting wall or flap 70 is provided as a cover for the elongated opening 5.
  • the flap 70 actuates a switch 71 via a lever 72.
  • a spring 73 holds the flap 70 in one closed position at the opening of the housing.
  • On the end areas an elongated base plate 74 are each a holder 75, 76, preferably attached made of plastic, with a Shoulder 77 and 78 are provided, on which the ends of the Support rail 21.
  • the Switch 71 housed with its resilient lever 72.
  • the flap 70 which is laterally pivotable between the brackets 75 and 76 is mounted, has a rounded extension 81 on, when rotating the lever 72 down presses to turn on switch 71.
  • FIGS. 8 and 9 show the relative position of the rail 21 with respect to the switch 71.
  • Figure 8 shows schematically the beginning the pivoting movement of the flap 70 when the extension 81 begins to exert pressure on the lever 72.
  • Figure 9 shows switch 71 in a closed position.
  • the flap 70 has slanted slots 82 which are provided to facilitate the passage of warm air.
  • the flap 70 is in the central region in cross section slightly arched and relatively strongly curved on the outer edge.
  • the outer surface of the extension 81 and the curved Part of the flap 70 also forms an arc in cross section Center in the pivot axis 83 of the flap 70, which is approximately located above the shorter U-leg 28 of the rail 21.
  • Another advantage of the device according to the invention is that the Input switch 3 (Fig. 1) can be omitted because of the inventive Electronics of the switch 11 or 71 are enough to to control the desired heat cycle.
  • the temperature sensor 26 does not necessarily have to be very precise. It For example, sensors known per se can be used. which have a PTC or an NTC resistor.
  • the Switch 31 is preferably a TRIAC switch.
  • Figures 10 and 11 show examples of housings with a round or square cross-section.

Description

Die vorliegende Erfindung betrifft ein Gerät zum Binden von Blättern durch Erwärmen gemäss dem Oberbegriff des Patentanspruchs 1.The present invention relates to a device for binding Scroll by heating according to the preamble of the claim 1.

Ein Gerät dieser Art ist beispielsweise aus der EP-B1-0 508 945 bekannt. Dieses Gerät umfasst eine längliche elektrische Heizvorrichtung, deren Länge der Länge einer länglichen Öffnung des Gerätes entspricht und eine Einschaltvorrichtung, um eine elektrische Schaltung zu aktivieren im Moment, in dem die Einbindung auf die Heizvorrichtung gestellt wird.A device of this type is, for example, from EP-B1-0 508 945 known. This device includes an elongated electrical heater, the length of the length of an elongated opening of the Device corresponds and a switching device to an electrical Activate circuit at the moment of inclusion is placed on the heater.

Dieses Gerät funktioniert in der Weise, dass während der Zeit, die es nach dem Einschalten braucht, bis sich die Heizvorrichtung erwärmt hat, ein akustisches oder optisches Alarmzeichen abgegeben wird. Die Heizvorrichtung selbst umfasst jedoch Kaltleiterelemente und ist daher selbstregelnd.This device works in such a way that during the time which it takes after switching on until the heater has warmed, an acoustic or visual alarm signal is delivered. However, the heating device itself comprises PTC thermistor elements and is therefore self-regulating.

Bei einem anderen Gerät dieser Art gemäss der DE-C2-38 05 996 ist ein Rechner vorgesehen, mit welchem über einen Fühler die Breite der in die Öffnung zwischen den Stützorganen eingelegten Umschläge abtastbar ist und mit welchem in Abhängigkeit hiervon die Einschaltzeit des Zeitzählers für das Heizelement festlegbar ist. In another device of this type according to DE-C2-38 05 996 a computer is provided with which the Width of the inserted in the opening between the support members Envelopes can be scanned and with which depending on it the switch-on time of the timer for the heating element can be set is.

Derartige Geräte können in vorzüglicherweise Weise zur Herstellung von Bucheinbänden, Broschüren und dergleichen oder bei ähnlichen Arbeiten eingesetzt werden, dadurch, dass der Rücken eines Loseblatt-Stapels unter Verwendung eines thermoplastisch wirkenden Klebstoffes unter Erwärmung gegen den Rücken einer Mappe verklebt wird, wobei die Blätter aus Papier, Karton, Kunststoff und/oder dergleichen sein können. Solche Geräte sind selbstverständlich auch geeignet, um das Kleben von zwei oder mehreren Blättern unter sich und/oder mit dem Rücken eines Mäppchens zu ermöglichen.Such devices can be manufactured in an excellent manner of book covers, brochures and the like or the like Works are used in that the back of a Loose-leaf stacks using a thermoplastic acting adhesive while heating against the back of a Folder is glued, the sheets of paper, cardboard, Plastic and / or the like can be. Such devices are of course also suitable to stick two or several sheets under and / or with the back of a pencil case to enable.

Die bekannten Geräte dieser Art sind jedoch ziemlich aufwendig, und es ist daher Aufgabe der vorliegenden Erfindung, ein solches Gerät zu verbessern.However, the known devices of this type are quite complex, and it is therefore an object of the present invention to provide such Improve device.

Diese Aufgabe wird erfindungsgemäss durch ein Gerät mit den im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmalen gelöst.This object is achieved according to the invention by a device with the characterizing part of claim 1 specified features.

Weitere vorteilhafte Ausführungen der Erfindung sind in den abhängigen Ansprüchen angegeben. Nachfolgend wird die Erfindung beispielsweise anhand einer Zeichnung näher erläutert. Dabei zeigt:

Figur 1
eine perspektivische Darstellung des Gehäuses eines Gerätes nach der Erfindung,
Figur 2
einen Querschnitt einer ersten Ausführung eines solchen Gerätes,
Figur 3
eine schematische Darstellung der Heizvorrichtung eines solchen Gerätes,
Figur 4
eine schematische Querschnittdarstellung dieser Heizvorrichtung,
Figur 5
ein Blockschaltbild der Elektronik eines solchen Gerätes,
Figur 6
ein Diagramm zur Erläuterung der Arbeitsweise eines solchen Gerätes,
Figur 7
eine schematische Darstellung einer weiteren Ausführung eines Gerätes nach der Erfindung,
Figur 8
eine schematische Darstellung zur Erläuterung der Arbeitsweise der Klappe nach Figur 7 am Anfang ihrer Bewegung,
Figur 9
eine schematische Darstellung dieser Klappe bei geschlossenem Schalter,
Figur 10
eine schematische Darstellung eines Gehäuses mit einem runden Querschnitt,
Figur 11
eine schematische Darstellung eines Gehäuses mit einem viereckigen Querschnitt.
Figur 12
ein Blockschaltbild einer anderen Ausführung der Elektronik für ein solches Gerät, und
Figur 13
eine schematische Darstellung zur Erläuterung der automatischen Anpassung der Bindezeit.
Further advantageous embodiments of the invention are specified in the dependent claims. The invention is explained in more detail below, for example with reference to a drawing. It shows:
Figure 1
a perspective view of the housing of a device according to the invention,
Figure 2
3 shows a cross section of a first embodiment of such a device,
Figure 3
1 shows a schematic representation of the heating device of such a device,
Figure 4
2 shows a schematic cross-sectional representation of this heating device,
Figure 5
a block diagram of the electronics of such a device,
Figure 6
a diagram to explain the operation of such a device,
Figure 7
1 shows a schematic representation of a further embodiment of a device according to the invention,
Figure 8
7 shows a schematic illustration to explain the mode of operation of the flap according to FIG. 7 at the beginning of its movement,
Figure 9
a schematic representation of this flap with the switch closed,
Figure 10
1 shows a schematic illustration of a housing with a round cross section,
Figure 11
is a schematic representation of a housing with a square cross section.
Figure 12
a block diagram of another version of the electronics for such a device, and
Figure 13
a schematic representation to explain the automatic adjustment of the binding time.

Das in den Figuren 1 und 2 dargestellte Gerät weist einen Grundkörper 1 mit oktogonalem Querschnitt auf. An der Stirnseite des Grundkörpers 1 sind ein Kabelanschluss 2, ein Schalter 3 und ein Bedienungsfeld 4 vorhanden. Der Grundkörper 1 weist auf der oberen Seite einen länglichen Schlitz 5 auf, dessen Breite zumindest angenähert der Breite einer Heizvorrichtung 6 entspricht, die eine wärmeleitende Schiene 7, vorzugsweise aus Aluminium, umfasst. An der inneren Seite (Fig. 2) einer Seitenwand 1' des Grundkörpers sind mindestens zwei in einem Abstand fixierte Träger für eine längliche seitlich schwenkbare Klappe 10 und ein Schalter 11 angeordnet, der über einen beweglichen Stift 12 beim Schwenken der Klappe 10 betätigt wird. Durch eine Feder 13 wird die Klappe 10 in einer erhöhten Lage gehalten, bei der der Schalter 11 nicht eingeschaltet ist.The device shown in Figures 1 and 2 has a base body 1 with an octagonal cross-section. At the front of the Base body 1 are a cable connection 2, a switch 3 and a Control panel 4 available. The base body 1 points to the upper one Side an elongated slot 5, the width at least corresponds approximately to the width of a heating device 6, which is a heat-conducting rail 7, preferably made of aluminum, includes. On the inner side (Fig. 2) of a side wall 1 'of The base body is at least two supports fixed at a distance for an elongated laterally pivotable flap 10 and a Switch 11 arranged, the via a movable pin 12 at Swiveling the flap 10 is actuated. By a spring 13 is the flap 10 is held in an elevated position, in which the Switch 11 is not turned on.

Die Heizvorrichtung 20 nach den Figuren 3 und 4 umfasst eine längliche Metallschiene 21, vorzugsweise aus Aluminium, mit einem angenähert U-förmigen Querschnitt, wie in Figur 4 dargestellt. Auf der unteren Seite der Schiene 21 ist ein Keramikträger 22 angeordnet, der vorzugsweise über einen eine relativ dünne Schicht bildenden Wärmeleitkleber 23 mit der flachen Seite der Schiene 21 geklebt ist.The heating device 20 according to FIGS. 3 and 4 comprises one elongated metal rail 21, preferably made of aluminum, with a approximately U-shaped cross section, as shown in Figure 4. On the lower side of the rail 21 is a ceramic support 22 arranged, preferably over a relatively thin Layer-forming thermal adhesive 23 with the flat side the rail 21 is glued.

Der Keramikträger 22 trägt vorzugsweise zwei über eine Sicherung 26 in Reihe geschaltete Widerstände 24, 25. Die Widerstände 24, 25 haben zwei Anschlüsse A1, A2 für den Heizstrom. Auf dem Widerstand 24 ist ein Temperaturfühler oder Sensor 27 mit zwei Anschlüssen B1, B2 angeordnet, und zwar vorzugsweise in einem Abstand von einem Ende der Schiene, der etwa gleich 1/3 der Länge der Schiene 21 ist, die zwei Schenkel 28, 29 aufweist, wobei der Schenkel 28 kürzer als der andere ist. Die zu bindenden Blätter werden vertikal im Bereich zwischen den Schenkeln 28 und 29 eingelegt. Die Widerstandsmassen sind durch eine Glasisolation 30 geschützt.The ceramic carrier 22 preferably carries two via a fuse 26 resistors 24, 25 connected in series. Resistors 24, 25 have two connections A1, A2 for the heating current. On the resistance 24 is a temperature sensor or sensor 27 with two connections B1, B2 arranged, preferably at a distance from one end of the rail, which is approximately equal to 1/3 of the length is the rail 21, which has two legs 28, 29, the Leg 28 is shorter than the other. The leaves to be bound are inserted vertically in the area between the legs 28 and 29. The resistance masses are through a glass insulation 30 protected.

Im Blockschaltbild nach Figur 5 sind der Schalter 11 (Fig. 2) und die Heizvorrichtung 20 mit dem Sensor 26 dargestellt. Der Schalter 11 ist über die Reihenschaltung der Heizvorrichtung 20 und eines Schalters 31 mit Erde verbunden. Ein an den Schalter 11 angeschlossener Gleichrichter 32 liefert den Strom für zwei Komparatoren 33, 34 und für eine Lampe 35, vorzugsweise ein Leuchtfeld oder eine rote LED-Lampe, welche über einen weiteren Schalter 36 mit Erde verbunden ist. Die Elektronik umfasst eine ODER-Verknüpfung 37, die eingangsseitig mit je einem Ausgang der Komparatoren 33, 34 verbunden ist, und deren Ausgangssignal zur Steuerung des Schalters 36 dient. Die Komparatoren 33 und 34 werden mit dem Ausgangssignal des Fühlers 26 beaufschlagt. Der Referenzspannungseingang des Komparators 33 ist mit einer an den Ausgang des Gleichrichters 32 angeschlossenen Referenzspannungsschaltung 38, die vorzugsweise ein Spannungsteiler ist, verbunden.In the block diagram of Figure 5, the switch 11 (Fig. 2) and the heater 20 is shown with the sensor 26. The Switch 11 is via the series connection of the heating device 20 and a switch 31 connected to earth. One at the switch 11 connected rectifier 32 supplies the current for two Comparators 33, 34 and for a lamp 35, preferably a Illuminated field or a red LED lamp, which over another Switch 36 is connected to earth. The electronics include one OR link 37, the input side with one output each Comparators 33, 34 is connected, and their output signal for Control of the switch 36 is used. Comparators 33 and 34 are acted upon by the output signal of the sensor 26. The Reference voltage input of the comparator 33 is connected to the Output of the rectifier 32 connected reference voltage circuit 38, which is preferably a voltage divider, connected.

Der Referenzspannungseingang des Komparators 34 ist mit einer an den Ausgang des Gleichrichters 32 angeschlossenen Verriegelungsschaltung oder Latch 39 verbunden, die mit dem Ausgang des Komparators 34 rückgekoppelt ist.The reference voltage input of the comparator 34 is on the output of the rectifier 32 connected locking circuit or latch 39 connected to the output of the comparator 34 is fed back.

Das Gerät nach den Figuren 1 bis 5 funktioniert folgendermassen:The device according to Figures 1 to 5 works as follows:

Beim Einführen von zu bindenden Blättern durch die Öffnung 5 wird der Hauptschalter 11 betätigt, das Ausgangssignal des Komparators 34 ist "1", der Schalter 31 ist geschlossen (Signal h in Fig. 6) und ein Heizstrom fliesst durch die Heizvorrichtung 20; dies entspricht dem Zustand im Zeitpunkt T1 nach Figur 6, wobei in diesem Moment wegen der ODER-Verknüpfung 37 ebenfalls ein Signal "1" (Signal a) am Eingang des Schalters 36 vorliegt, so dass die Anzeige oder Lampe 35 aktiviert ist bzw. brennt.When inserting sheets to be bound through the opening 5 the main switch 11 is actuated, the output signal of the comparator 34 is "1", switch 31 is closed (signal h 6) and a heating current flows through the heating device 20; this corresponds to the state at time T1 according to FIG. 6, at this moment also because of the OR operation 37 a signal "1" (signal a) is present at the input of switch 36, so that the indicator or lamp 35 is activated or burns.

Der ansteigende Temperaturverlauf ist abhängig von der konstanten Masse der Schiene und der Masse der eingesteckten Blätter, die schwanken kann. Bei einer Prozesstemperatur von etwa 140°C beginnt der Leim flüssig zu werden; dies entspricht dem Zeitpunkt T3 (Signal b). Etwas früher in einem Zeitpunkt T2, der einer im voraus bestimmten Tmin entspricht, wird der Komparator 33 aktiv und gibt ein Signal "1" ab, das für den Heizvorgang an sich ohne Bedeutung ist.The rising temperature curve depends on the constant mass of the rail and the mass of the inserted leaves, which can fluctuate. At a process temperature of around 140 ° C, the glue begins to become liquid; this corresponds to time T3 (signal b). A little earlier at a time T2, which corresponds to a predetermined T min , the comparator 33 becomes active and emits a signal "1", which is of no importance per se for the heating process.

Die Referenzspannung des Komparators 34 ist derart vorbestimmt, dass bei einer Sensortemperatur Tmax sein Ausgangssignal "0" und der Schalter 31 (Signal h) ausgeschaltet wird. Dies entspricht dem Zeitpunkt T4 in Figur 6. Durch die natürliche Abkühlung des Geräts sinkt die Temperatur. Solange T>Tmin ist, gibt der Komparator 33 ein Ausgangssignal "1" ab und der Schalter 36 bleibt geschlossen, das heisst die Lampe 35 brennt so lange bis T<Tmin geworden ist. Dann, das heisst im Zeitpunkt T5 (Fig. 6), erlischt sie. The reference voltage of the comparator 34 is predetermined such that its output signal "0" and the switch 31 (signal h) are switched off at a sensor temperature T max . This corresponds to time T4 in FIG. 6. The temperature drops as the device cools naturally. As long as T> T min , the comparator 33 outputs an output signal "1" and the switch 36 remains closed, that is to say the lamp 35 burns until T <T min . Then, that is to say at time T5 (FIG. 6), it goes out.

Wegen der Rückkopplung des Komparators 34 bleibt der Schalter 31 offen, auch wenn T<Tmax geworden ist, so dass die Heizwirkung nur ab Zeitpunkt T1 bis zum Zeitpunkt T4 dauert. In dieser Zeit ist der Energieverbrauch (Verlauf e, Fig. 6) am grössten.Because of the feedback of the comparator 34, the switch 31 remains open, even if T <T max , so that the heating effect only lasts from time T1 to time T4. During this time, the energy consumption (curve e, Fig. 6) is greatest.

Das Gerät bleibt eingeschaltet solange Blätter im Gerät eingesteckt bleiben, die über die niedergedrückte Klappe 10 (Verlauf k, Fig. 6) den Hauptschalter 11 geschlossen halten. Nach Herausnahme der gebundenen Blätter wird der Strom unterbrochen, die Verriegelungsschaltung verliert ihre Wirkung, beispielsweise durch Entladung eines Kondensators, und der Prozess kann von vorne beginnen, wobei bei einer sofort nachfolgenden Bindung die Prozesszeit bzw. Bindezeit kleiner wird, weil die Heizvorrichtung noch etwas warm ist.The device remains switched on as long as sheets are inserted in the device remain that over the depressed flap 10 (course k, Fig. 6) keep the main switch 11 closed. After removal of the bound leaves the stream is interrupted Latch circuit loses its effect, for example by discharging a capacitor, and the process can start from Start at the beginning, with the immediately following binding the Process time or binding time becomes shorter because of the heating device is still a little warm.

Dieses Verfahren ergibt von selbst eine gute Anpassung der Wärmeleistung an die Mappendicke, ohne spezielle Regelkreise und auch ohne Zeitmessungen und ermöglicht ein schnelles Aufheizen ohne Vorwärmphase. Die Heizung wirkt im Zeitraum von T3 bis T5 (Fig. 6).This procedure automatically adjusts the heat output well to the portfolio thickness, without special control loops and even without time measurements and enables rapid heating without preheating phase. The heating works from T3 to T5 (Fig. 6).

Bei einer grossen Mappendicke wird wegen der Trägheit des Systems (Fig. 13) der Temperaturgradient entsprechend kleiner, das heisst, die Zeit T5 - T3 wird grösser, und die Heizvorrichtung 20 bleibt länger eingeschaltet, was bei der grossen Mappendicke erwünscht ist; dadurch ergibt sich von selbst die notwendige Dauer des Heizvorgangs in Abhängigkeit von der Mappendicke. Da der Prozess über Tmax und Tmin geregelt wird, erfolgt eine automatische Anpassung der Bindezeit.In the case of a large folder thickness, the temperature gradient becomes correspondingly smaller due to the inertia of the system (FIG. 13), that is to say the time T5-T3 becomes longer, and the heating device 20 remains switched on longer, which is desirable given the large folder thickness; this automatically results in the necessary duration of the heating process depending on the folder thickness. Since the process is controlled via T max and T min , the binding time is automatically adjusted.

Zudem ist in den Wartezeiten der Energieverbrauch gleich null. Die Mappe kann entnommen werden, sobald die Lampe 35 nicht mehr brennt, weil dann der Prozess abgeschlossen ist. Die Mappe darf jedoch weiterhin im Gerät bleiben, zum Beispiel wenn man sie vergisst, weil die Heizung ausgeschaltet ist und daher die Mappe nicht durch Überhitzung beschädigt werden kann. In addition, the energy consumption is zero during the waiting times. The folder can be removed as soon as the lamp 35 is no longer burns because then the process is complete. The folder may however, continue to stay in the device, for example if you use them forgets because the heating is switched off and therefore the folder cannot be damaged by overheating.

In der Ausführung nach Figur 7 ist eine schmale schwenkbare Wand oder Klappe 70 als Abdeckung für die längliche Öffnung 5 vorgesehen. Beim Schwenken betätigt die Klappe 70 einen Schalter 71 über einen Hebel 72. Eine Feder 73 hält die Klappe 70 in einer an der Öffnung des Gehäuses geschlossenen Lage. Auf den Endbereichen einer länglichen Basisplatte 74 sind je eine Halterung 75, 76, vorzugsweise aus Kunststoff befestigt, die mit einer Schulter 77 bzw. 78 versehen sind, auf die sich die Enden der Schiene 21 stützen. In einem Hohlraum der Halterung 76 ist der Schalter 71 mit seinem federnden Hebel 72 untergebracht. An der Halterung 75 ist vertikal eine gedruckte Schaltung 79 befestigt, die die in Figur 7 nicht dargestellte Elektronik sowie eine obere Anzeigelampe 80 und/oder ein akustisches Anzeigeelement hält. Die Klappe 70, die in Längsrichtung seitlich schwenkbar zwischen den Halterungen 75 und 76 gelagert ist, weist eine rundliche Erweiterung 81 auf, die beim Rotieren den Hebel 72 nach unten drückt, um den Schalter 71 einzuschalten.In the embodiment according to FIG. 7 there is a narrow pivoting wall or flap 70 is provided as a cover for the elongated opening 5. When pivoting, the flap 70 actuates a switch 71 via a lever 72. A spring 73 holds the flap 70 in one closed position at the opening of the housing. On the end areas an elongated base plate 74 are each a holder 75, 76, preferably attached made of plastic, with a Shoulder 77 and 78 are provided, on which the ends of the Support rail 21. In a cavity of the holder 76 is the Switch 71 housed with its resilient lever 72. At the Bracket 75 is vertically attached to a printed circuit 79, the electronics not shown in Figure 7 and an upper Indicator lamp 80 and / or an acoustic indicator element holds. The flap 70 which is laterally pivotable between the brackets 75 and 76 is mounted, has a rounded extension 81 on, when rotating the lever 72 down presses to turn on switch 71.

Die Figuren 8 und 9 zeigen die relative Position der Schiene 21 in Bezug auf den Schalter 71. Figur 8 zeigt schematisch den Anfang der Schwenkbewegung der Klappe 70, wenn die Erweiterung 81 beginnt, einen Druck auf den Hebel 72 auszuüben. Figur 9 zeigt den Schalter 71 in einer geschlossenen Lage.FIGS. 8 and 9 show the relative position of the rail 21 with respect to the switch 71. Figure 8 shows schematically the beginning the pivoting movement of the flap 70 when the extension 81 begins to exert pressure on the lever 72. Figure 9 shows switch 71 in a closed position.

Vorzugsweise weist die Klappe 70 schräge Schlitze 82 auf, die vorgesehen sind, um den Durchgang der warmen Luft zu erleichtern. Die Klappe 70 ist im Querschnitt im mittleren Bereich leicht gewölbt und an dem äusseren Rand relativ stark gekrümmt. Die äussere Mantelfläche der Erweiterung 81 und des gekrümmten Teils der Klappe 70 bilden im Querschnitt einen Kreisbogen mit Zentrum in der Schwenkachse 83 der Klappe 70, die sich etwa oberhalb des kürzeren U-Schenkels 28 der Schiene 21 befindet.Preferably, the flap 70 has slanted slots 82 which are provided to facilitate the passage of warm air. The flap 70 is in the central region in cross section slightly arched and relatively strongly curved on the outer edge. The outer surface of the extension 81 and the curved Part of the flap 70 also forms an arc in cross section Center in the pivot axis 83 of the flap 70, which is approximately located above the shorter U-leg 28 of the rail 21.

Ein weiterer Vorteil des erfindungsgemässen Geräts ist, dass der Eingangsschalter 3 (Fig. 1) entfallen kann, weil durch die erfindungsgemässe Elektronik der Schalter 11 oder 71 genügen, um den gewünschten Wärmezyklus zu steuern. Another advantage of the device according to the invention is that the Input switch 3 (Fig. 1) can be omitted because of the inventive Electronics of the switch 11 or 71 are enough to to control the desired heat cycle.

Der Temperaturfühler 26 muss nicht unbedingt sehr genau sein. Es können beispielsweise an sich bekannte Sensoren eingesetzt werden, die einen PTC oder einen NTC-Widerstand aufweisen. Der Schalter 31 ist vorzugsweise ein TRIAC-Schalter.The temperature sensor 26 does not necessarily have to be very precise. It For example, sensors known per se can be used. which have a PTC or an NTC resistor. The Switch 31 is preferably a TRIAC switch.

Die Figuren 10 und 11 zeigen Beispiele von Gehäusen mit einem runden bzw. viereckigen Querschnitt.Figures 10 and 11 show examples of housings with a round or square cross-section.

Claims (10)

  1. Device for binding sheets by heating, of which at least one sheet is provided with adhesive at the edge to be bound, having an elongate electrical heating device whose length corresponds to the length of an elongate opening in the device, and having a switching device in order to activate an electrical circuit at the instant at which the binding is placed on the heating device, characterized in that the heating device (20) is connected in series with a switch (11) belonging to the switching device (11, 12) and a heating current switch (31), in that there are means to keep this heating current switch (31) switched on when the switching device (11, 12) is switched on, and in that the device comprises a comparator (34) whose input is connected to a temperature sensor (26) that measures the temperature of the heating device and which, when a predetermined upper temperature threshold (Tmax) is reached, switches the heating current switch (31) off.
  2. Device according to Claim 1, characterized in that there are means to keep the heating current switch (31) switched off, after it has been switched off, until the switching device (11, 12) is switched off.
  3. Device according to Claim 1 or 2, characterized in that there is a further comparator (33) whose input is connected to the temperature sensor (26) and which, when the temperature falls below a predetermined lower threshold (Tmin), supplies a control signal for a further switch (36), which actuates an indicating element (35) that is connected to the switching device (11, 12) via a rectifier circuit (32).
  4. Device according to Claim 3, characterized in that the outputs of the two comparators (33, 34) are connected to the control input of the further switch (36) via an OR logic element (37).
  5. Device according to one of Claims 1 to 4, characterized in that the output of the comparator (34) which discriminates the upper temperature threshold is fed back to its reference signal input via an interlock circuit (39).
  6. Device according to one of Claims 3 to 5, characterized in that the comparators (33, 34) and the interlock circuit (39), and also a reference signal circuit (38) for the further comparator (33) that discriminates the lower temperature threshold, are connected, in terms of their feed voltage, to the rectifier circuit (32).
  7. Device according to one of Claims 1 to 6, characterized in that the heating device (20) comprises an elongate metal rail (21), on one side of which a ceramic carrier (22) with at least one resistor (24, 25) is arranged, and in that the temperature sensor (27) is located in an insulated manner on the said resistor or one of these resistors (24, 25) and preferably two resistors (24, 25) being connected in series with a temperature safeguard (protective device) (26).
  8. Device according to one of Claims 1 to 7, characterized in that the temperature sensor is located at a distance from one end of the heating device which is greater than 1/4 of the overall length of the latter.
  9. Device according to one of Claims 1 to 8, characterized in that the heating device comprises a rail whose cross section is of U shape, the limbs (28, 29) of the U being located on the side not occupied by a resistor (24, 25), and one of the limbs (28) preferably being shorter than the other.
  10. Device according to Claim 9, characterized in that in the elongate opening there is an elongate (narrow) flap (70) which can be pivoted sideways, serves as a covering for the opening and, at the same time, comprises means for actuating a switch (71).
EP96810673A 1996-10-07 1996-10-07 Device for binding sheets by heating Expired - Lifetime EP0839671B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP96810673A EP0839671B1 (en) 1996-10-07 1996-10-07 Device for binding sheets by heating
DE59608325T DE59608325D1 (en) 1996-10-07 1996-10-07 Device for binding sheets by heating
US08/944,285 US5910263A (en) 1996-10-07 1997-10-06 Device for binding sheets by heating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96810673A EP0839671B1 (en) 1996-10-07 1996-10-07 Device for binding sheets by heating

Publications (2)

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EP0839671A1 EP0839671A1 (en) 1998-05-06
EP0839671B1 true EP0839671B1 (en) 2001-11-28

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DE10019510A1 (en) * 2000-04-18 2001-10-31 Copy Lein Gmbh Thermal binding device
US6452793B1 (en) 2001-01-26 2002-09-17 Micron Technology, Inc. Apparatuses and methods for preventing disengagement of electrical connectors in the assembly of computers
US7332696B2 (en) * 2005-02-28 2008-02-19 Hickey Charles P Food warming or cooling package thermometer assembly
CN111137043A (en) * 2020-01-14 2020-05-12 河北科技大学 Hot rivet head structure of binding machine and binding machine

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JPS60117518A (en) * 1983-11-28 1985-06-25 オムロン株式会社 Relay unit
US4678386A (en) * 1985-07-05 1987-07-07 Bind-O-Matic Ab Thermal sheet binding apparatus and a method for binding of loose sheets in a folder
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Publication number Publication date
DE59608325D1 (en) 2002-01-10
EP0839671A1 (en) 1998-05-06
US5910263A (en) 1999-06-08

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