DE2759238C2 - Circuit arrangement of a welding device for producing bags from plastic films - Google Patents

Circuit arrangement of a welding device for producing bags from plastic films

Info

Publication number
DE2759238C2
DE2759238C2 DE2759238A DE2759238A DE2759238C2 DE 2759238 C2 DE2759238 C2 DE 2759238C2 DE 2759238 A DE2759238 A DE 2759238A DE 2759238 A DE2759238 A DE 2759238A DE 2759238 C2 DE2759238 C2 DE 2759238C2
Authority
DE
Germany
Prior art keywords
circuit arrangement
welding device
resistance
electrical
plastic films
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE2759238A
Other languages
German (de)
Other versions
DE2759238B1 (en
Inventor
Joachim 5860 Iserlohn Karasch
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 DE2759238A priority Critical patent/DE2759238C2/en
Publication of DE2759238B1 publication Critical patent/DE2759238B1/en
Application granted granted Critical
Publication of DE2759238C2 publication Critical patent/DE2759238C2/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
    • 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
    • B29C66/80—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
    • B29C66/83—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
    • B29C66/851—Bag or container making machines
    • B29C66/8511—Bag making machines
    • 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
    • B29C66/944—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/841—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions
    • B29C66/8416—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions of different thickness
    • 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
    • B29C66/944—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time
    • B29C66/9441—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time the time being controlled or regulated as a function of another parameter
    • 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
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2247/00—Manual operations for making bags or boxes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Push-Button Switches (AREA)

Description

Die Erfindung betriff' eine Schaltungsanordnung eines Schweißgerätes zum Herstellen von Beuteln aus Kunststoffolien, wobei die miteinander zu verbindenden Kunststoffolien an der Verbindungsstelle unter mechanischem Druck mittels eines elektrischen, manuell an eine elektrische Spannung anlegbaren Widerstands-Drahtes oder dergleichen erwärmt werden, der nach einer vorwählbaren Zeit selbsttätig abgeschaltet wird, wozu der zur Erwärmung der Kunststoffolien dienende Widerstands-Draht mit einem Bimetallschalter in Reihe geschaltet ist, dem eine auf diesen wirksame elektrisch,' Heizung zugeordnet ist, welche zum Bimetallschalter parallel geschaltet ist.The invention relates to a circuit arrangement of a welding device for producing bags Plastic sheeting, which is to be connected to one another Plastic films at the connection point under mechanical pressure by means of an electrical, manually an electrical voltage can be applied to the resistance wire or the like, after which a preselectable time is switched off automatically, including the one used to heat the plastic film Resistance wire is connected in series with a bimetal switch, one of which is electrically effective on this, ' Heating is assigned, which is connected in parallel to the bimetal switch.

Schweißgeräte dieser Art sind bekannt Sie arbeiten mit einer gegenüber der Netzspannung erheblich verminderten Betriebsspannung von beispielsweise 14 V. Zur Spannungsminderung ist im Schweißgerät ein Transformator angeordnet, wobei der manuell beiätigbare elektrische Schalter primärseitig und der der Erwärmung der Kunststoffolien auf Schweißtemperatur dienende Widerstandsdraht und der Bimetallschalter sekundärseitig angeschaltet sind.Welding devices of this type are known. They work with a considerably higher voltage than the mains voltage reduced operating voltage of for example 14 V. There is a voltage reduction in the welding device Transformer arranged, with the manually operated electrical switch on the primary side and that of the Heating of the plastic foils to the welding temperature serving resistance wire and the bimetallic switch are switched on on the secondary side.

Um sowohl dünne als auch dicke Kunststoffolien in kürzester Zeit mit dem gleichen Schweißgerät sicher verschweißen zu können, sind auch Schweißgeräte bekannt, bei welchen die Schweißzeit wahlweise geändert werden kann, wobei beispielsweise eine Schweißzeit von 5 bis 12 Sekunden gewählt werden kann, Bei einem bekannten Schweißgerät dieser Art sind hierzu relativ teure elektronische Steuer- und Schaltvorrichtungen vorgesehen.To secure both thin and thick plastic films in the shortest possible time with the same welding machine To be able to weld, welding devices are also known in which the welding time is optional can be changed, for example a welding time of 5 to 12 seconds can be selected can, in a known welding device of this type are this relatively expensive electronic control and Switching devices provided.

Ferner ist es hierzu aus der betrieblichen Praxis bekannt, die Längenänderung des Widerstandsdrlihtes infolge Erwärmung zum Ausschalten auszunutzen, wobei die Längenänderung über mechanische StellgliedIt is also known for this from operational practice, the change in length of the resistance wire due to heating to be used to switch off, with the change in length via mechanical actuator

der auf einen elektrischen Ausschalter übertragen wird.which is transmitted to an electrical switch.

Aber auch derartige Maßnahmen zur wahlweisen Veränderung der Schweißzeit sind relativ umständlich und teuer.However, such measures for optionally changing the welding time are also relatively cumbersome and expensive.

Aufgabe der Erfindung ist es nun, bei einer Schaltungsanordnung eines Schweißgerätes eingangs beschriebener Gattung mit wesentlich einfacheren und billigeren Mitteln als bislang die Schweißzeit wahlweise variieren zu können.The object of the invention is now to provide a circuit arrangement of a welding device described type with much simpler and cheaper means than previously the welding time optional to be able to vary.

Die Lösung dieser Aufgabe kennzeichnet sich erfindungsgemäß dadurch, daß in Reihe zur Bimetallschalter-Heizung ein verstellbarer ohmscher Widerstand geschaltet istThe solution to this problem is characterized according to the invention in that heating in series with the bimetal switch an adjustable ohmic resistor is connected

Mit dieser verblüffend einfachen Maßnahme kann der Widerstand der auf den Bimetallschalter wirksamen Heizung und somit die Einschaltdauer des Bimetallschalters wahlweise verändert und den jeweiligen Bedürfnissen exakt angepaßt werden. Dabei ist eine derartige Schaltungsanordnung mehr als um die Hälfte billiger als bekannte hierzu erforderliche Steuer- und Schaltvorrichtungen.With this amazingly simple measure, the resistance of the bimetal switch can be effective Heating and thus the duty cycle of the bimetal switch optionally changed and the respective Needs to be adapted exactly. Such a circuit arrangement is more than half that cheaper than known control and switching devices required for this.

Eine vorteilhafte und erfinderische Weiterbildung des vorbeschriebenen Gegenstandes besteht darin, daß zum verstellbaren ohmschen Widerstand ein zweiter verstellbarer ohmscher Widerstand parallel geschaltet istAn advantageous and inventive development of the above-described subject is that for adjustable ohmic resistance, a second adjustable ohmic resistance is connected in parallel

Hierdurch kann der Verstellbereich der Schaltelemente zur Veränderung der Einschaltdauer des Bimetallschalters, welcher durch Henuellungstoleranzen bei den Schaltelementen bedingt sehr unterschiedlieh sein kann, ohne Manipulationen auf bestimmbare Werte justiert werden.This allows the adjustment range of the switching elements to change the duty cycle of the Bimetal switch, which is due to Henuellungstoleranzen with the switching elements conditionally very different can be adjusted to definable values without manipulation.

Dabei ist es vorteilhaft, wenn der zweite verstellbare ohmsche Widerstand einen kleineren elektrischen Widerstand als der erste ohmsche Widerstand aufweist Em Ausführungsbeispiel der Erfindur.g ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.It is advantageous if the second adjustable ohmic resistance has a smaller electrical resistance Embodiment of embodiment of the invention is shown in FIG Drawing shown and is described in more detail below.

Es zeigtIt shows

F i g. 1 ein Schweißgerät zum Herstellen von Beuteln aus Kunststoffolien in der Parallslperspektive,F i g. 1 a welding machine for making bags from plastic foils in the parallel perspective,

F i g. 2 ein elektrisches Schaltbild der in obiges Schweißgerät eingefügten elektrischen Schaltelemente, F i g. 3 eine Variante.F i g. 2 an electrical circuit diagram of the electrical switching elements inserted in the above welding device, F i g. 3 a variant.

Dieses Schweißgerät besteht im wesentlichen aus einem Gehäuse 1, einem an letzteres angelenkten Deckel 2, einem elektrischen erwärmbaren Widerstandsdraht 3 und aus im Inneren des Gehäuses 1 angeordneten elektrischen Schaltelementen sowie einer nicht dargestellten elektrischen Zuleitung mit Netzstekker. This welding device consists essentially of a housing 1, one hinged to the latter Cover 2, an electrically heatable resistance wire 3 and from inside the housing 1 arranged electrical switching elements as well as an electrical supply line (not shown) with mains plug.

Die Betriebsspannung dieses Gerätes beträgt 14 V. Zur Spannnungsminderung ist ein Transformator 4 vorgesehen, der mittels eines Schalters 5 an die Netzspannung angelegt werden kann.
Dieser Schalter 5 ist im Gehäuse 1 unter einem Fenster 6 angeordnet. Er ist als Taster ausgebildet und wird beim Schließen des Deckels 2 mittels eines von letzterem abstrebenden Fingers 7 geschlossen.The operating voltage of this device is 14 V. To reduce the voltage, a transformer 4 is provided, which can be connected to the mains voltage by means of a switch 5.
This switch 5 is arranged in the housing 1 under a window 6. It is designed as a button and is closed when the cover 2 is closed by means of a finger 7 striving from the latter.

Am Deckel 2 befindet sich noch eine bei geschlossenem Deckel 2 auf dem Widerstandsdraht 3 sich abstutzende Leiste 2' aus nachgiebigem Werkstoff zum Zusammendrücken der miteinander zu verbindenden Kunststoffolien.On the cover 2 there is another one when it is closed Cover 2 on the resistance wire 3 supporting bar 2 'made of flexible material for Compression of the plastic films to be joined together.

Außerdem ist im Gehäuse 1 eine oben offene Kammer 8 zur Aufnahme einer gefalteten und gerollten Kunststoffolie vorgesehen,In addition, in the housing 1 is an open top chamber 8 for receiving a folded and rolled Plastic film provided,

An der Sekundärseite des Transformators 4 ist ein Bimetallschalter 9 und in Reihe zu diesem derOn the secondary side of the transformer 4 is a bimetal switch 9 and in series with this

Widerstsndsdraht 3 geschaltet. Parallel zum Bimetallschalter 9 ist eine letzteren erwärmbare elektrische Heizung 10 angeschaltet. Weiterhin ist in Reihe zu letzterer ein verstellbarer ohmscher Widerstand 11 geschaltet.Resistance wire 3 switched. Parallel to the bimetal switch 9, a latter heatable electric heater 10 is switched on. Furthermore is in series too the latter an adjustable ohmic resistor 11 is connected.

Parallel zum Widerstandsdraht 3 ist noch eine Kontrollampe 12 geschaltet, die durch ein Fenster 13 im Gehäuse 1 sichtbar ist. Der verstellbare Widerstand 11 ist mittels eines Stellorgans 14 von außen betätigbar.In parallel with the resistance wire 3, a control lamp 12 is also connected, which is through a window 13 in the Housing 1 is visible. The adjustable resistance 11 can be actuated from the outside by means of an actuator 14.

In F i g. 3 ist zusätzlich ein verstellbarer ohmscher Widerstand 15 vorgesehen, der zum Widerstand 11 parallel geschaltet ist. Der Widerstand 15 ist irn Gehäuse J von außen nicht betätigbar angeordnetIn Fig. 3, an adjustable ohmic resistor 15 is additionally provided, which is connected to the resistor 11 is connected in parallel. The resistor 15 is arranged in the housing J so that it cannot be operated from the outside

Die Widerstände 11 + 15 sind in einem so großen Abstand vom Bimetallschalter 9 angeordnet, daß sie letzteren nicht thermisch beeinflussen können.The resistors 11 + 15 are arranged at such a large distance from the bimetal switch 9 that they can not thermally influence the latter.

Alle neuen in der Beschreibung und/oder der Zeichnung offenbarten Einzel- und Kombinationsmerkmale werden als erfindungswesentlich angesehen.All new individual and combination features disclosed in the description and / or the drawing are considered essential to the invention.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (3)

Patentansprüche:Patent claims: 1. Schaltungsanordnung eines Schweißgerätes zum Herstellen von Beuteln aus Kunstoffolien, wobei die miteinander zu verbindenden Kunststoffolien an der Verbindungsstelle unter mechanischem Druck mittels eines elektrischen, manuell an eine elektrische Spannung anlegbaren Widerstands-Drahtes oder dergleichen erwärmt werden, der nach einer vorwählbaren Zeit selbsttätig abgeschaltet wird, wozu der zur Erwärmung der Kunststoffolien dienende Widerstands-Draht mit einem Bimetallschalter in Reihe geschaltet ist, dem eine auf diesen wirksame elektrische Heizung zugeordnet ist, welche zum Bimetallschalter parallel geschaltet ist, dadurch gekennzeichnet, daß in Reihe zur Bimetallschalter-Heizung (10) ein verstellbarer ohmscher Widerstand (ti) geschaltet ist1. Circuit arrangement of a welding device for the production of bags from plastic foils, the plastic films to be connected to one another at the connection point under mechanical action Pressure by means of an electrical resistance wire that can be manually applied to an electrical voltage or the like are heated, which switches off automatically after a preselectable time for which purpose the resistance wire used to heat the plastic film with a bimetallic switch is connected in series, to which an electrical heater effective on this is assigned, which is connected in parallel to the bimetal switch, characterized in that in series with Bimetal switch heating (10) an adjustable ohmic resistor (ti) is connected 2. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß zum verstellbaren ohmschen Widerstand (11) ein zweiter verstellbarer ohmscher Widerstand (i5) paraüei geschaltet ist.2. Circuit arrangement according to claim 1, characterized in that the adjustable ohmic Resistance (11) a second adjustable ohmic Resistor (i5) is switched on. 3. Schaltungsanordnung nach einem oder beiden vorhergehenden Ansprüchen, dadurch gekennzeichnet, daß der zweite verstellbare ohmsche Widerstand (15) einen kleineren elektrischen Widerstand als der erste ohmsche Widerstc-nd (11) aufweist.3. Circuit arrangement according to one or both of the preceding claims, characterized in that that the second adjustable ohmic resistor (15) has a smaller electrical resistance than the first ohmic resistance (11).
DE2759238A 1977-12-31 1977-12-31 Circuit arrangement of a welding device for producing bags from plastic films Expired DE2759238C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2759238A DE2759238C2 (en) 1977-12-31 1977-12-31 Circuit arrangement of a welding device for producing bags from plastic films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2759238A DE2759238C2 (en) 1977-12-31 1977-12-31 Circuit arrangement of a welding device for producing bags from plastic films

Publications (2)

Publication Number Publication Date
DE2759238B1 DE2759238B1 (en) 1978-08-17
DE2759238C2 true DE2759238C2 (en) 1979-04-19

Family

ID=6027925

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2759238A Expired DE2759238C2 (en) 1977-12-31 1977-12-31 Circuit arrangement of a welding device for producing bags from plastic films

Country Status (1)

Country Link
DE (1) DE2759238C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129505B1 (en) * 1983-06-15 1987-03-11 Geberit AG Control circuit for switching off the heating current of a current-heated plastics welding sleeve

Also Published As

Publication number Publication date
DE2759238B1 (en) 1978-08-17

Similar Documents

Publication Publication Date Title
DE2532394C2 (en) Circuit arrangement for operating a high-pressure mercury vapor discharge lamp used in a home sun
DE2759238C2 (en) Circuit arrangement of a welding device for producing bags from plastic films
DE3036366C2 (en)
DE2841691C2 (en) Control device for household heating appliances, in particular for electric hotplates
DE3522546C2 (en)
DE2017422C3 (en) Automatic safety circuit for monitoring the power switching element of an electrical power consumer
DE2805527A1 (en) DEVICE FOR SETTING AND DISPLAYING THE POWER OUTPUT OF AN ELECTRIC HEAT GENERATOR
DE2205353C2 (en) Heating flange for an electric kettle
DE1274260B (en) Device for adjusting the power supply to electric hotplates
DE3630604A1 (en) Starting control circuit
DE2124333C3 (en) Circuit arrangement for controlling a two-hand operated safety switch
DE1465032C (en) Thermostatically controlled, electrically heated large cooker
DE4315488A1 (en) Method and circuit arrangement for controlling the temperature of AC-operated heating devices
DE2128161A1 (en) Method for attenuating high current peaks and switches for performing this method
EP0828270A2 (en) Electrical switch gear
DE1159109B (en) Equipment for electric hotplates
DE2751701A1 (en) Bidet unit with water and air heater - has hot and cold water connections and soap and perfume containers incorporated in housing
DE2419984B2 (en) Display device for a hair dryer
AT328399B (en) Pressing
DE1465031C (en) Thermostatically controlled, electrically heated cooking pot
DE1463073C (en) Circuit arrangement for position-dependent switching on and off a loading device on a rotating machine
DE2446325C3 (en)
DE1161366B (en) Circuit for electrical heaters
DE2108631C3 (en) Self-timer for photographic cameras
DE1597264C (en) Electric shutter with an electromagnet and a photoresistor for a camera

Legal Events

Date Code Title Description
EHJ Ceased/non-payment of the annual fee