DE1027587B - Device for closing thermoplastic plastic bags or the like. - Google Patents

Device for closing thermoplastic plastic bags or the like.

Info

Publication number
DE1027587B
DE1027587B DEP16386A DEP0016386A DE1027587B DE 1027587 B DE1027587 B DE 1027587B DE P16386 A DEP16386 A DE P16386A DE P0016386 A DEP0016386 A DE P0016386A DE 1027587 B DE1027587 B DE 1027587B
Authority
DE
Germany
Prior art keywords
jaws
closing
bag
plastic bags
thermoplastic plastic
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.)
Pending
Application number
DEP16386A
Other languages
German (de)
Inventor
Fritz W Post
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEP16386A priority Critical patent/DE1027587B/en
Publication of DE1027587B publication Critical patent/DE1027587B/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8244—Actuating mechanisms magnetically driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8324—Joining or pressing tools pivoting around one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/861—Hand-held tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Package Closures (AREA)

Description

Vorrichtung zum Verschließen von thermoplastischen Kunststoffbeuteln od. dgl. Device for closing thermoplastic plastic bags or the like

Die weitverbreitete, wegen ihrer guten Eigenschaften ständig steigende Verwendung von thermoplastischen Kunststoffen für mannigfache Verpackungszwecke erfordert zur Ausnutzung der guten Schweißbarkeit dieser Materialien und dem wasser-, luft-und aromafesten Verschluß von Beutelm und Hüllen daraus besonders handliche, in der Bedienung tunlichst narrensichere Hilfseinrichtungen und Geräte. The widespread one, which is constantly increasing because of its good properties Use of thermoplastics for various packaging purposes requires to take advantage of the good weldability of these materials and the water, air- and aroma-proof closure of bags and covers made of it, particularly handy, Foolproof auxiliary equipment and devices as far as possible to operate.

Es sind hierfür aus USA.-Patentschriften Einrichtungen bekanntgeworden, welche diesem Zweck dienen sollen. In der Regel sind es elektrische Einrichtungen, deren Schweißbacken unmittelbar aus dem NetzoderüberSpannungswandler aufgeheizt werden. doch ist auch ein Walzengerät bekanntgeworden, das mittels Dampf oder Gas beheizt werden soll. Facilities for this purpose have become known from USA patents, which should serve this purpose. As a rule, it is electrical equipment, whose welding jaws are heated directly from the mains or voltage converter will. but also a roller device has become known, which by means of steam or gas should be heated.

Meist wird das sogenannte Wärmeverfahren verwendet, bei welchem gleichbleibend temperierte Backen intermittierend zur Schweißung mit dem Schweißgut in Berührung gebracht werden. Mostly the so-called heat process is used, in which constant temperature-controlled jaws intermittently for welding in contact with the weld metal to be brought.

Soweit in einem Fall von Impulsschweißung die Rede ist (ThermaI-ImpulseType).werdenvongleichbleibend hoch temperierten Walzen mittelbar Wärmeintervalle zur Schweißung auf das Schweißgut übertragen. Soweit es sich nicht um Walzengeräte für die kontinuierliche Fertigung handelt, werden die Backenn manuell oder elektromagnetisch zusammengebracht. Insofar as pulse welding is used in one case (ThermaI-ImpulseType), they become constant high temperature rollers indirectly heat intervals for welding onto the weld metal transfer. As far as it is not about roller devices for continuous production acts, the jaws are brought together manually or electromagnetically.

Die Bedienung derartiger Geräte erfordert Fingerspitzengefühl und erhebliche Erfahrung, xveil die Temperierung und Einwirkungsdauer kritisch sind. The operation of such devices requires a sure instinct and considerable experience, xveil the temperature control and exposure time are critical.

Für schnell wechselnden Betneb sind derartige Geräte schon wegen der erforderlichen Anheizzeit kaum geeignet.For fast changing Betneb such devices are already because of the required heating time hardly suitable.

Erfindungsgemäß wird daber eine Vorrichtung vorgeschlagen, bei welcher alle Vorgänge selbsttätig ablaufen und die sofort gefahrlos und ohne Fehlleistungen von Laien benutzt werden kann. Bei der Vorrichtung nach der Erfindung sind die Funktionen des Spannungswandlers und des elektromagnetischen Betätigulngs, organs zusammen. gelegt, und es wird das sogenannte Kurzzeit-Wärmeimpulsverfahren an sich bekannter Art angewandt. According to the invention, a device is proposed in which all processes run automatically and are immediately safe and without failures can be used by laypeople. In the device according to the invention, the functions the voltage converter and the electromagnetic actuation organ together. laid, and the so-called short-term heat pulse method is known per se Kind applied.

Hierbei werden die zunächst kalten Backen in sehr kurzer Zeit auf Schweißtemperatur aufgeheizt, um nach der Schweißung wieder zu erkalten. Der hierfür erforderliche Stromimpuls wird dabei von einem einstellbaren Kurzzeit-Impulsschalter bekannter Art begrenzt. The initially cold cheeks are opened in a very short time Welding temperature heated up to cool down again after welding. The one for this The required current pulse is provided by an adjustable short-term pulse switch known type limited.

Die Vorrichtung zum Verschließen von thermoplastischen KunststoNbeuteIn oder-hüllen durch Wärmeeinwirkung mittels zweier beheizter, zueinander beweglicher Backenn wird gemäß der Erfindung so ausgestaltet, daß die Backen in je einem beweglichen und feststehenden Magnetpol eines Magnetjochs eingefiigt sind und die Wicklung eines Magnetpols sowohl bei Erregung durch Gleichstrom zur Erzeugung einer magnetischen Schließkraft für die Backen als auch bei zusätzlicher Erregung durch Wechselstrom zusammen mit entsprechenden Wicklungen auf den Magnetpolen als Transformator für den Heizstrom dient. The device for closing thermoplastic plastic bags or sheaths through the action of heat by means of two heated, mutually movable Backenn is designed according to the invention so that the jaws in one movable and fixed magnetic pole of a magnetic yoke are inserted and the winding of a Magnetic pole both when excited by direct current to generate a magnetic Closing force for the jaws as well as with additional excitation by alternating current together with corresponding windings on the magnetic poles as a transformer for the heating current is used.

In Berücksichtigung zu erwartender Verwendung von Briefhüllen aus Plastik ist die Vorrichtung nach der Erfindung ergänzt durch eine elektromagnetisch mitbetätigte Abschneidvorrichtung zum schnellen Öff. nan derartiger Briefhüllen und Beutel, z. B, im Bürobetriel). In consideration of the expected use of envelopes Plastic, the device according to the invention is supplemented by an electromagnetic one also operated cutting device for quick opening. nan such envelopes and bags, e.g. B, in the office).

Für die Verwendung im Büro und zum Verschließen von Plastikbriefhülten können in an sich bekannter Weise mittels auswechselbarer Matrizen Datums-, Absender- oder sonstige Angaben in die Schweißnaht mit eingeprägt werden. For use in the office and for sealing plastic letter sleeves date, sender and or other information is also embossed into the weld seam.

Die Abbildungen zeigen ein Ausführungsl) eispiel einer Vorrichtung nach der Erfindung. The figures show an exemplary embodiment of a device according to the invention.

In das handliche Gehäuse 15 ist die Einrichtung ohne nach außen führende mechanisch bewegte Teile eingebaut. In the handy housing 15, the device is without leading to the outside mechanically moving parts built in.

Schmale Schlitze 1 und 13 dienen der Einführung der zu bearbeitenden Beutel-oder Hüllenränder, während Abschnitte vom Orfnen durch die Offnung 14 herausfallen. Narrow slots 1 and 13 are used to introduce the to be machined Bag or envelope edges, while portions of the opening fall out through the opening 14.

Die eigentliche Einrichtung besteht aus den l) eiden Backen 2 und 3, die jeweils in die einander gegenüberliegenden Magnetpole eines feststehenden und eines beweglichen Teiles des Magnetjochs 5 und 4 eingefügt sind. The actual device consists of the l) two jaws 2 and 3, each in the opposing magnetic poles of a fixed and a movable part of the yoke 5 and 4 are inserted.

Auf dem feststehenden vie auf dem beweglichen Teil dieses Magnetjochs ist jeweils eine Spute 7 und 6 angeordnet. Die gemeinsam auf dem beweglichen Teil bzw. in dem Magnetpol dieses Teiles angeordnete Backs 2 und Spule 6 sind elektrisch starr miteinander verbunden. Die Zugfeder 9 hält den beweglichen Teil des Magnetjochs in der Ruhelage in der dargestellten Stellung. An den beweglichen Teil 4 des Magnetiochs ist ferner die Stange 8 und am diese wiederum der einarmige Hebel 10 angelenkt. Bewegungen des Magnetjochteiles 4 werden dadurch auf Hebel 10 und das an seinem Ende angebrachte Messer 11 übertragen, das mit dem feststehenden Messer 12 zusammenwi, -kend als Abschneider für Beutel-oder Hüllenränder dient. Die neben den Backen 2 und 3 liegenden Polteile o-o bleiben kalt und halten die Beutelränder vor, während und bis kurz nach der Schweißung fest. Die elastischen Füße 16 geben der Vorrichtung einen guten, rutschfesten Stand. On the fixed vie on the moving part of this magnetic yoke a spute 7 and 6 is arranged in each case. The common on the moving part or backs 2 and coil 6 arranged in the magnetic pole of this part are electrical rigidly connected to each other. The tension spring 9 holds the moving part of the magnet yoke in the rest position in the illustrated Position. On the moving ones Part 4 of the magnet hole is also the rod 8 and on this in turn the one-armed Lever 10 articulated. Movements of the magnetic yoke part 4 are thereby switched to lever 10 and the knife 11 attached to its end transferred that with the fixed Knife 12 together wi, -kend serves as a cutter for bag or envelope edges. The pole pieces o-o lying next to the jaws 2 and 3 remain cold and hold the Bag edges firm before, during and until shortly after welding. The elastic Feet 16 give the device a good, non-slip stand.

Abb. 2 zeigt ein Schaltungsbeispiel einer Vorrichtung nach der Erfindung. Wird ein Beutelrand eingeführt und der Fußkontakt 21 betätigt, so fließt zunächst ein Gleichstrom vom Gleichrichter 19 über die Drossel 17 durch die Primärspule 7p und zurück ins Netz. Der Gleichstrom magnetisiert das Magnetjoch, und dessen beweglicher Tei'l 4 wird entgegen dem Federzug von Feder 9 gegen den feststehenden Teil 5 des Magnetjochs gepreßt. Die Backen 2 und 3 werden also, den Beutelrand zwischen sich, fest gegeneinandergepreßt. Fig. 2 shows a circuit example of a device according to the invention. If a bag edge is inserted and the foot contact 21 is actuated, then initially flows a direct current from the rectifier 19 via the reactor 17 through the primary coil 7p and back to the network. The direct current magnetizes the magnet yoke and its movable Part 4 is against the spring tension of spring 9 against the fixed part 5 of the Magnet yoke pressed. Jaws 2 and 3 are so, with the edge of the bag between them, firmly pressed against each other.

Durch den nunmehr geschlossenen Eisenweg des Magnetjochs ändert sich die Selbstinduktion der Spu, 9p erheblich, was eine entsprechende Anderung des Stromflusses durch Drossel 17 bewirkt. Diese Strom-Spannungs-Anderung an der Drossel 17 wird zur Auslösung des Kurzzeit-Impulsschalters 20 ausgenutzt. The now closed iron path of the magnet yoke changes the self-induction of the Spu, 9p considerably, resulting in a corresponding change in the current flow caused by throttle 17. This current-voltage change at the choke 17 is used to trigger the short-term pulse switch 20.

Impulsschalter 20 schickt einen zeitlich begrenzten We. chselstromimpuls einstellbarer Dauer zusätzlich durch die Spu, le 7p. Pulse switch 20 sends a time-limited We. current pulse adjustable duration additionally through the coil 7p.

Im Gegensatz zu dem Betätigungsgleichstrom wird der Wechselstromimpuls auf die Sekundärwicklungen 6 und 7 induziert und erzeugt in ihnen entsprechende Spannungen zur schnellen Aufheizung der Backen 2 und 3. Durch diesen schnellen Wärmeimpuls werden die Beutelränder verschweißt. In contrast to the direct current operating current, the alternating current pulse becomes induced on the secondary windings 6 and 7 and generated in them corresponding Tensions for rapid heating of jaws 2 and 3. This rapid heat pulse the bag edges are welded.

Mit der Beendigung des Schweißimpulses löst der Impulsschalter 20 auch den Fußschalter 21 in Freiauslösung bekannter Art aus, d. h., die Auslösung erfolgt auch dann, wenn der Bedienende den Fußschalter noch gedrückt hält. With the termination of the welding pulse, the pulse switch 20 triggers also the foot switch 21 in free release of a known type, d. i.e., the release takes place even if the operator is still holding down the foot switch.

Die Auslösung des Schalters 21 macht die Einrichtung stromlos, und nach einiger Verzögerung kehrt das Magnetjochteil 4 entsprechend dem Federzug von 9 in die Ruhelage zurück. Dadurch werden die Ränder des verschlossenen Beutels freigegeben. The triggering of the switch 21 makes the device de-energized, and after some delay, the yoke part 4 returns according to the spring tension of 9 back to the rest position. This will release the edges of the sealed pouch.

Der Grad der Verzögerung kann in bekannter Weise, z. B. durch entsprechende Bemessung des Konden- sators 18, bestimmt werden. Zur Betätigung der Abschneidvorrichtung wird nun der gleichstromseitige Teil der Einrichtung benutzt, wobei Hilfseinrichtungen bekannter Art eine Impulseinleitung verhindern, solange kein Beutelrand zwischen den Backen 2 und 3 liegt.The degree of delay can be in a known manner, e.g. B. by appropriate Dimensioning of the condensate sators 18, can be determined. To operate the cutting device the DC-side part of the device is now used, with auxiliary devices known type prevent impulse initiation as long as there is no edge of the bag between jaws 2 and 3.

PATENTANSPROCHE : 1. VorrichtungzumVerschließenvon thermoplastischen Kunststoffbeuteln oder-hüllen durch Wärmeeinwirkung mittels zweier beheizter, zueinander beweglicher Backen, dadurch gekennzeichnet, daß die Backen (2 und 3) in je einem beweglichen (4) und feststehenden (5) Magnetpol eines Magnetjochs eingefügt sind und die Wicklung (7p) eines Magnetpols sowohl bei Erregung durch Gleichstrom zur Erzeugung einer magnetischen n Schließkraft für die Backen als auch bei zusätzlicher Erregung durch Wechselstrom zusammen mit entsprechenden Wicklungen (6 und 7) auf den Magnetpolen als Transformator für den Heizstrom dient. PATENT CLAIM: 1. Device for closing thermoplastics Plastic bags or envelopes due to the action of heat by means of two heated one to the other movable jaws, characterized in that the jaws (2 and 3) each in one movable (4) and fixed (5) magnetic pole of a magnetic yoke are inserted and the winding (7p) of a magnetic pole both when energized by direct current to the Generation of a magnetic closing force for the jaws as well as for additional Excitation by alternating current together with corresponding windings (6 and 7) the magnetic poles serves as a transformer for the heating current.

Claims (1)

2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Backen (2 und 3), wie an sich bekannt, nach dem Wärmeimpulsverfahren beheizbar sind. 2. Apparatus according to claim 1, characterized in that the jaws (2 and 3), as is known per se, can be heated by the heat pulse method. 3. Vorrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß der Wärmeimpuls zum Verschließen erst nach dem Zusammenpressen der Backen (2 und 3) automatisch ausgelöst und durch einen einstellbaren Impulskurzzeitschalter (20) bekannter Art beendet wird. 3. Apparatus according to claim 1 and 2, characterized in that the heat impulse for closing only after the jaws have been pressed together (2 and 3) automatically triggered and triggered by an adjustable pulse short-time switch (20) known type is terminated. 4. Vorrichtung nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß den Backen (2 und 3) kalt bleibende Teile (o-o) zugeordnet sind, die die Beutelfolienteile während des Verschließens festhalten. 4. Apparatus according to claim 1 to 3, characterized in that the jaws (2 and 3) remaining cold parts (o-o) are assigned, which are the bag film parts hold on tight while closing. 5. Vorrichtung nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß sie von einem Gehäuse (15) derart umkleidet ist, daß jeweils nur ein schmaler Einfiihrungsschilitz (1 und 13) für das zu behandelnde Beutelende vorhanden ist. 5. Apparatus according to claim 1 to 4, characterized in that it is encased in a housing (15) in such a way that only one narrow insertion slot at a time (1 and 13) is available for the end of the bag to be treated. 6. Vorrichtung nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß an dem beweglichen Magnetpol (4) ein Abschneidemesser (10, 11) angelenkt ist, das mit einem im Gehäuse (15) ortsfesten Messer (12) zusammenarbeitet. 6. Apparatus according to claim 1 to 5, characterized in that a cutting knife (10, 11) is articulated on the movable magnetic pole (4), which cooperates with a fixed knife (12) in the housing (15). In Betracht gezogene Druckschriften : USA.-Patentschriften Nr. 2 248 248, 2 305 010, 2 369 362, 2 685 911, 2 730 161. References Considered: U.S. Patents No. 2 248 248, 2 305 010, 2 369 362, 2 685 911, 2 730 161.
DEP16386A 1956-06-05 1956-06-05 Device for closing thermoplastic plastic bags or the like. Pending DE1027587B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2844303A1 (en) * 1977-10-11 1979-04-12 Eng & Res Ass DESKTOP UNIT FOR SEALING HOSES
DE2911605A1 (en) * 1979-03-24 1980-10-02 Siegfried Schraivogel Plastic foil welding appliance - with two-hinged power operated heated jaws and separate clamping strips
DE3210566A1 (en) * 1982-03-23 1983-10-06 Aldo Artusi METHOD FOR MOVING A BODY FIXED TO A CARRIER
EP0274641A2 (en) * 1986-12-17 1988-07-20 International Paper Company Improved sealing method and apparatus for high capacity aseptic form, fill, and seal machines
FR2628704A1 (en) * 1988-03-16 1989-09-22 Dauvers Claude Sealing device for plastic sack - has heated jaw fusing surfaces of l plastic material together with electronic control of temp.
USRE33467E (en) 1985-01-30 1990-12-04 International Paper Company Induction sealing of paperboard
DE4117706A1 (en) * 1991-05-30 1992-12-03 Alois Hoeft Plastic bottle closer compressing heated portion of neck - forms tight seal by bringing together electrically-heated jaws of clamp around neck at its m.pt.
FR2835806A1 (en) * 2002-02-12 2003-08-15 Noel Beche MACHINE FOR CLOSING THERMOSCELLARIZED VARIOUS CONTAINERS

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248248A (en) * 1938-08-24 1941-07-08 Edwin J Mcilvried Bag sealing machine
US2305010A (en) * 1939-12-20 1942-12-15 Walter E Kenney Electric cellophane bag sealer
US2369362A (en) * 1942-06-05 1945-02-13 Frank Evans Bowker Pressure applicator
US2685911A (en) * 1951-06-06 1954-08-10 Ivers Lee Co Package having cover crimp-sealed thereto and method of and apparatus for making it
US2730161A (en) * 1951-11-10 1956-01-10 Langer Nicholas Heat sealing machine of the thermal impulse type and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248248A (en) * 1938-08-24 1941-07-08 Edwin J Mcilvried Bag sealing machine
US2305010A (en) * 1939-12-20 1942-12-15 Walter E Kenney Electric cellophane bag sealer
US2369362A (en) * 1942-06-05 1945-02-13 Frank Evans Bowker Pressure applicator
US2685911A (en) * 1951-06-06 1954-08-10 Ivers Lee Co Package having cover crimp-sealed thereto and method of and apparatus for making it
US2730161A (en) * 1951-11-10 1956-01-10 Langer Nicholas Heat sealing machine of the thermal impulse type and method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2844303A1 (en) * 1977-10-11 1979-04-12 Eng & Res Ass DESKTOP UNIT FOR SEALING HOSES
DE2911605A1 (en) * 1979-03-24 1980-10-02 Siegfried Schraivogel Plastic foil welding appliance - with two-hinged power operated heated jaws and separate clamping strips
DE3210566A1 (en) * 1982-03-23 1983-10-06 Aldo Artusi METHOD FOR MOVING A BODY FIXED TO A CARRIER
USRE33467E (en) 1985-01-30 1990-12-04 International Paper Company Induction sealing of paperboard
EP0274641A2 (en) * 1986-12-17 1988-07-20 International Paper Company Improved sealing method and apparatus for high capacity aseptic form, fill, and seal machines
EP0274641A3 (en) * 1986-12-17 1989-03-29 International Paper Company Improved sealing method and apparatus for high capacity aseptic form, fill, and seal machines
FR2628704A1 (en) * 1988-03-16 1989-09-22 Dauvers Claude Sealing device for plastic sack - has heated jaw fusing surfaces of l plastic material together with electronic control of temp.
DE4117706A1 (en) * 1991-05-30 1992-12-03 Alois Hoeft Plastic bottle closer compressing heated portion of neck - forms tight seal by bringing together electrically-heated jaws of clamp around neck at its m.pt.
FR2835806A1 (en) * 2002-02-12 2003-08-15 Noel Beche MACHINE FOR CLOSING THERMOSCELLARIZED VARIOUS CONTAINERS
WO2003068601A1 (en) * 2002-02-12 2003-08-21 Beche Noel Machine that is used to heat seal different containers

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