ITGE20110058A1 - "PACKAGE WELDING DEVICE WITH DOUBLE LEVER DRIVE FOR PACKAGING MACHINES". - Google Patents

"PACKAGE WELDING DEVICE WITH DOUBLE LEVER DRIVE FOR PACKAGING MACHINES". Download PDF

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Publication number
ITGE20110058A1
ITGE20110058A1 IT000058A ITGE20110058A ITGE20110058A1 IT GE20110058 A1 ITGE20110058 A1 IT GE20110058A1 IT 000058 A IT000058 A IT 000058A IT GE20110058 A ITGE20110058 A IT GE20110058A IT GE20110058 A1 ITGE20110058 A1 IT GE20110058A1
Authority
IT
Italy
Prior art keywords
levers
support
bars
welding
rotation
Prior art date
Application number
IT000058A
Other languages
Italian (it)
Inventor
Gianluigi Rossi
Original Assignee
Gianluigi Rossi
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 Gianluigi Rossi filed Critical Gianluigi Rossi
Priority to IT000058A priority Critical patent/ITGE20110058A1/en
Priority to PCT/EP2012/059556 priority patent/WO2012160077A1/en
Publication of ITGE20110058A1 publication Critical patent/ITGE20110058A1/en

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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
    • B29C66/001—Joining in special atmospheres
    • B29C66/0012—Joining in special atmospheres characterised by the type of environment
    • B29C66/0014—Gaseous environments
    • B29C66/00145—Vacuum, e.g. partial vacuum
    • 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
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • 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
    • 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
    • B29C66/8225—Crank mechanisms
    • 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
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B29C66/82263—Follower pin or roller cooperating with a groove
    • 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
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along 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
    • B29C66/849—Packaging machines
    • 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
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/021—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas the containers or wrappers being interconnected
    • 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
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only 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
    • 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
    • B29C65/745—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 using a single unit having both a severing tool and a welding tool
    • B29C65/7451—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 using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • 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
    • B29C66/81421—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 convex or concave
    • B29C66/81422—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 convex or concave being convex
    • 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/2042—Means for altering the cross-section of the tube filling opening prior to transversal sealing, e.g. tube spreading devices

Description

DESCRIZIONE DESCRIPTION

"Dispositivo di saldatura dei pacchi con azionamento a doppia leva per macchine impacchettatrici" "Package sealing device with double lever operation for packaging machines"

TESTO DELLA DESCRIZIONE TEXT OF THE DESCRIPTION

La presente invenzione riguarda un dispositivo di saldatura dei pacchi per macchine impacchettatrici, utilizzabile anche in un processo di confezionamento di pacchi sottovuoto, pertanto anche in macchine provviste di campane o camere per il vuoto. The present invention relates to a pack sealing device for packing machines, which can also be used in a vacuum pack packaging process, therefore also in machines equipped with vacuum bells or chambers.

Come à ̈ noto le macchine impacchettatrici possono essere orizzontali o verticali, di tipo manuale e automatico e vengono utilizzate per ottenere delle confezioni finite di prodotti sfusi. Nelle macchine impacchettatrici automatiche una certa quantità di prodotto sfuso viene introdotto all'interno di un elemento tubolare cavo che fornisce la forma del pacchetto che si vuole ottenere. Attorno a tale elemento tubolare VIene avvolto un film in materiale plastico che viene trascinato verso il basso e viene sottoposto ad una saldatura longitudinale mediante dei meZZI saldatori. Al termine di tale saldatura longitudinale, il film che formerà la confezione di prodotto deve essere saldato in senso trasversale, in modo da chiudere la cima e il fondo delle confezioni. N elle macchine sottovuoto ciascun pacco all'uscita dell' elemento tubolare formatore deve essere introdotto in una campana o camera per il vuoto. As is known, packaging machines can be horizontal or vertical, manual and automatic, and are used to obtain finished packages of bulk products. In automatic packing machines a certain quantity of loose product is introduced inside a hollow tubular element which gives the shape of the package to be obtained. A plastic film is wrapped around this tubular element which is dragged downwards and is subjected to longitudinal sealing by means of welding means. At the end of this longitudinal sealing, the film that will form the product package must be sealed transversely, in order to close the top and bottom of the packages. In vacuum machines each pack at the outlet of the forming tubular element must be introduced into a bell or chamber for the vacuum.

A valle dell' elemento tubolare formatore sono previsti dei dispositivi di saldatura trasversale della cima e del fondo delle confezioni e di separazione delle stesse. Tali dispositivi possono essere di dimensioni molto ingombranti, di scarsa efficienza e necessitano di complicati mezzi attuatori per la movimentazione delle teste di saldatura, anche nel caso di applicazione di tali dispositivi alle macchine sottovuoto, nelle quale à ̈ necessario garantire l' ermeticità della campana o camera per il vuoto. Downstream of the forming tubular element there are transversal sealing devices for the top and bottom of the packages and for separating them. These devices can be very bulky, of poor efficiency and require complicated actuator means for moving the welding heads, even in the case of application of these devices to vacuum machines, in which it is necessary to guarantee the hermetic seal of the bell or vacuum chamber.

Lo scopo della presente invenzione à ̈ pertanto la realizzazione di un dispositivo di saldatura dei pacchi per macchine impacchettatrici che, mediante l'utilizzo di un unico motore di azionamento, permetta di trasformare il moto rotatorio di tale motore in un moto lineare alternativo delle barre di saldatura, In modo da allontanarle ed avvicinarle eventualmente anche a velocità variabile. Tale dispositivo, grazIe a dei meZZI di azionamento a doppia leva, SI rivela particolarmente compatto ed efficiente ed utilizzabile con grandi vantaggi costruttivi anche all'interno delle camere o campane per il vuoto delle macchine impacchettatrici sottovuoto. The purpose of the present invention is therefore the realization of a pack welding device for packaging machines which, through the use of a single drive motor, allows to transform the rotary motion of this motor into a reciprocating linear motion of the bars. welding, in order to move them away and possibly approach them even at variable speed. This device, thanks to the double lever actuation means, is particularly compact and efficient and can be used with great constructive advantages even inside the vacuum chambers or bells of the vacuum packing machines.

Tale scopo viene raggiunto dalla presente invenzione mediante un dispositivo di saldatura dei pacchi per macchine impacchettatrici secondo la rivendicazione 1. This object is achieved by the present invention by means of a pack sealing device for packaging machines according to claim 1.

Altre vantaggiose caratteristiche del presente dispositivo di saldatura dei pacchi per macchine impacchettatrici sono oggetto delle rivendicazioni dipendenti. Other advantageous characteristics of the present package sealing device for packaging machines are the subject of the dependent claims.

Ulteriori caratteristiche e vantaggi della presente invenzione verranno meglio compreSI nel corso della seguente descrizione, considerata a titolo esemplificativo e non limitativo e riferita ai disegni allegati, nei quali: Further characteristics and advantages of the present invention will be better understood in the course of the following description, considered by way of non-limiting example and referring to the attached drawings, in which:

- la fig. 1 illustra una pnma vista In elevazione laterale di una pnma forma esecutiva di un dispositivo di saldatura dei pacchi per macchine impacchettatrici, provvisto, secondo la presente invenzione, di mezzi di azionamento a doppia leva ed in una prima posizione aperta con le barre di saldatura alla massima distanza l'una dall'altra; - fig. 1 illustrates a first side elevation view of a first embodiment of a pack sealing device for packaging machines, provided, according to the present invention, with double lever actuation means and in a first open position with the sealing bars at the maximum distance from each other;

- la fig. 2 illustra una vista dall'alto del presente dispositivo di fig. 1 nella posizione aperta; - fig. 2 shows a top view of the present device of fig. 1 in the open position;

- la fig. 3 illustra una seconda vista in elevazione laterale della pnma forma esecutiva del presente dispositivo in una posizione completamente chiusa e con una distanza o luce minima tra le barre di saldatura; - fig. 3 illustrates a second side elevation view of the first embodiment of the present device in a fully closed position and with a minimum distance or gap between the welding bars;

- la fig. 4 illustra una vista dall'alto del presente dispositivo di fig. 3 nella posizione chiusa; - fig. 4 shows a top view of the present device of fig. 3 in the closed position;

- la fig. 5 illustra una pnma vista dall' alto di una seconda forma esecutiva del presente dispositivo di saldatura provvisto di mezzi di azionamento a doppia leva ed in una prima posizione aperta con le barre di saldatura alla massima distanza l'una dall' altra; - fig. 5 shows a top view of a second embodiment of the present welding device provided with double lever actuation means and in a first open position with the welding bars at the maximum distance from each other;

- la fig. 6 illustra una vista in elevazione laterale dei mezzi di azionamento a doppia leva del presente dispositivo di fig. 1 nella posizione di fig. 5; - fig. 6 shows a side elevation view of the double lever actuation means of the present device of fig. 1 in the position of fig. 5;

- la fig. 7 illustra una seconda vista dall' alto della seconda forma esecutiva del presente dispositivo in una seconda posizione chiusa con le barre di saldatura alla minima distanza l'una dall' altra; e - fig. 7 shows a second top view of the second embodiment of the present device in a second closed position with the welding bars at the minimum distance from each other; And

- la fig. 8 illustra una vista in elevazione laterale dei mezzi di azionamento a doppia leva del presente dispositivo di fig. 7 nella chiusa di fig. 7. - fig. 8 shows a side elevation view of the double lever actuation means of the present device of fig. 7 in the sluice of fig. 7.

Con riferimento a tali disegni allegati e con particolare riferimento alle figure 1 e 2 degli stessi, con 15 à ̈ indicata una camera per il vuoto di una macchina impacchettatrice sottovuoto, ad esempio un apparato per il confezionamento di pacchi sottovuoto quale quello descritto nella domanda di brevetto GE20 11A000006 appartenente al titolare della presente domanda. Tale camera 15 per il vuoto, illustrata parzialmente e schematicamente, comprende un contenitore inferiore 16, ad esempio di forma rettangolare, ed un'intelaiatura scatolare superiore 17. Tale intelaiatura 17 à ̈ provvista superiormente di una prima apertura 18, che può essere chiusa ermeticamente da un coperchio scorrevole 19, ed inferiormente di una seconda apertura 20 per il passaggio dei pacchi al contenitore inferiore 16, il quale à ̈ provvisto di mezzi, non illustrati, atti a creare il vuoto all'interno della camera 15 e quindi a rendere sottovuoto ciascun pacco. Ciascuno dei pacchi che arriva alla camera 1 per il vuoto, si veda ad esempio il pacco P illustrato in fig. 2, à ̈ saldato completamente sul fondo, mentre sulla cima à ̈ stato saldato in parte. La saldatura finale della CIma di ciascuno dei pacchi viene effettuata mediante due barre 5 e 5' di saldatura, allineate trasversalmente e contrapposte l'una all'altra. Tali barre sono azionate mediante un dispositivo di trasmissione del moto comprendente una struttura 1 di supporto di due coppIe di guide 2 e 2' orizzontali e parallele. Tale struttura 1 di supporto à ̈ interamente contenuta all' interno della camera 15 per il vuoto. Sulle guide 2 e 2' scorre una coppia di slitte o pattini 3 e 3'. Ciascuno di tali pattini 3 e 3' à ̈ sostanzialmente una piastra rettangolare provvista di quattro fori passanti, si veda ad esempio il foro passante 103, nei quali sono inserite le due coppie di guide 2 e 2'. Il pattino 3 e il pattino 3' posizionati su ciascuna guida 2 e 2' traslano contemporaneamente ed<1ll>direzioni opposte l'uno rispetto all' altro, quindi si allontanano o si avvicinano reciprocamente. Il pattino 3' disposto, guardando le figure, sul lato destro del dispositivo à ̈<1ll>pOSIZIOne speculare, rispetto ad un piano mediano M del dispositivo, al pattino 3 posto sul lato sinistro. Il pattino 3' situato sul lato destro supporta una prima piastra 4' sostanzialmente a "L", posizionata in posizione speculare, rispetto al piano mediano M, ad una seconda piastra 4 sostanzialmente a "L" e portata dal pattino 3 situato su lato sinistro del dispositivo. Ciascuna di tali piastre 4 e 4' supporta rispettivamente una di dette barre 5 e 5' di saldatura che devono essere traslate in un senso o nell'altro. Anche tali barre 5 e 5' sono in posizione speculare rispetto al piano mediano M del dispositivo. Ciascuna delle slitte 3 e 3' à ̈ collegata mediante una piastrina 6 e 6' provvista di relativo perno 7 e 7' ad una prima parte finale di una relativa leva arcuata: il perno 7 à ̈ collegato alla prima parte finale libera 108 di una prima leva arcuata 8, mentre il perno 7' à ̈ collegato ad una prima parte finale libera 108' di una seconda leva arcuata 8'. Tali prime parti finali 108 e 108' delle leve arcuate sono in posizioni diametralmente opposte. Tali leve arcuate 8 e 8' possono avere la forma di un arco di circonferenza, di un arco di ellisse o simili e sono preferibilmente uguali. Ciascuna di tali leve arcuate 8 e 8' comprende una seconda parte finale 208 e 208' vincolata ad una piastra 9 di supporto, in questo caso di forma circolare. La seconda parte finale 208 della leva arcuata 8 à ̈ collegata a tale piastra 9 mediante un perno lO attorno al quale tale leva 8 può ruotare, mentre la seconda parte finale 208' della leva arcuata 8' à ̈ collegata alla piastra 9 mediante un perno lO' attorno al quale tale leva 8' può ruotare. I perni lO e lO' e quindi le parti finali 208 e 208' delle leve 8 e 8' sono collocati in prossimità della periferia di detta piastra 9 ed in posizioni diametralmente opposte rispetto alla stessa. Tale piastra 9 di supporto à ̈ collegata centralmente con l'albero Il di un motore elettrico 12, fissato ad una parete dell' intelaiatura scatolare 17 della camera o campana 15 per il vuoto. Nella situazione di figure 1 e 2 il presente dispositivo à ̈ ill ustrato in posizione aperta, vale a dire con le barre 5 e 5' di saldatura alla massina distanza L l'una dall' altra, pertanto, in tale situazione, il pacco p può passare tranquillamente attraverso lo spazio libero lasciato tra dette barre 5 e 5'. With reference to these attached drawings and with particular reference to figures 1 and 2 of the same, 15 indicates a chamber for the vacuum of a vacuum packing machine, for example an apparatus for packaging vacuum packs such as the one described in the application for GE20 patent 11A000006 belonging to the owner of the present application. This vacuum chamber 15, partially and schematically illustrated, comprises a lower container 16, for example rectangular in shape, and an upper box-like frame 17. This frame 17 is provided at the top with a first opening 18, which can be hermetically closed. by a sliding lid 19, and at the bottom of a second opening 20 for the passage of the packs to the lower container 16, which is provided with means, not illustrated, able to create the vacuum inside the chamber 15 and therefore to make vacuum each pack. Each of the packs that reaches the vacuum chamber 1, see for example the pack P illustrated in fig. 2, it is completely welded on the bottom, while on the top it has been partially welded. The final welding of the IC of each of the packs is carried out by means of two welding bars 5 and 5 ', aligned transversely and opposite each other. These bars are operated by means of a motion transmission device comprising a structure 1 for supporting two pairs of horizontal and parallel guides 2 and 2 '. This support structure 1 is entirely contained inside the vacuum chamber 15. A pair of slides or runners 3 and 3 'slides on the guides 2 and 2'. Each of these shoes 3 and 3 'is substantially a rectangular plate provided with four through holes, see for example the through hole 103, in which the two pairs of guides 2 and 2' are inserted. The shoe 3 and the shoe 3 'positioned on each guide 2 and 2' translate simultaneously and in opposite directions with respect to each other, therefore they move away or approach each other. The runner 3 'arranged, looking at the figures, on the right side of the device is mirrored, with respect to a median plane M of the device, to the runner 3 located on the left side. The shoe 3 'located on the right side supports a first plate 4' substantially "L" shaped, positioned in a mirror position, with respect to the median plane M, to a second plate 4 substantially "L" shaped and carried by the shoe 3 located on the left side of the device. Each of said plates 4 and 4 'respectively supports one of said welding bars 5 and 5' which must be translated in one direction or the other. These bars 5 and 5 'are also in a specular position with respect to the median plane M of the device. Each of the slides 3 and 3 'is connected by means of a plate 6 and 6' provided with relative pin 7 and 7 'to a first final part of a relative arched lever: the pin 7 is connected to the first free final part 108 of a first arched lever 8, while the pin 7 'is connected to a first free final part 108' of a second arched lever 8 '. These first final parts 108 and 108 'of the arcuate levers are in diametrically opposite positions. These arcuate levers 8 and 8 'can have the shape of an arc of circumference, an arc of ellipse or the like and are preferably the same. Each of these arcuate levers 8 and 8 'comprises a second final part 208 and 208' constrained to a support plate 9, in this case of circular shape. The second final part 208 of the arched lever 8 is connected to this plate 9 by means of a pin 10 around which this lever 8 can rotate, while the second final part 208 'of the arched lever 8' is connected to the plate 9 by means of a pin 10 'around which this lever 8' can rotate. The pins 10 and 10 'and therefore the final parts 208 and 208' of the levers 8 and 8 'are located in proximity to the periphery of said plate 9 and in diametrically opposite positions with respect to it. This support plate 9 is centrally connected to the shaft 11 of an electric motor 12, fixed to a wall of the box-like framework 17 of the chamber or bell 15 for the vacuum. In the situation of figures 1 and 2, the present device is illustrated in the open position, that is to say with the welding bars 5 and 5 'at the maximum distance L from each other, therefore, in this situation, the package p it can safely pass through the free space left between said bars 5 and 5 '.

Nelle figure 3 e 4 il presente dispositivo à ̈ illustrato in POSIZIone chiusa, vale a dire con le barre 5 e 5' di saldatura alla minima distanza l'uno dall'altra. Tali barre 5 e 5'<1ll>questa situazione, se il presente dispositivo viene applicato ad un apparato per il confezionamento di pacchi sottovuoto quale quello descritto nella domanda di brevetto GE20 IlA000006 appartenente al titolare della presente domanda, completano la saldatura della cima del pacco P delle figure precedenti. Tale pacco, infatti, arriva alla camera 15 per il vuoto con il fondo completamente saldato e con la cima parzialmente saldata e VIene opportunamente posizionato all'interno del contenitore inferiore 16 di detta camera 15. Il coperchio 19, in questa fase, chiude ermeticamente tale camera 15 per il vuoto. In Figures 3 and 4 the present device is shown in closed POSITION, that is to say with the welding bars 5 and 5 'at the minimum distance from each other. These bars 5 and 5 'in this situation, if the present device is applied to an apparatus for the packaging of vacuum packs such as the one described in the patent application GE20 IlA000006 belonging to the owner of the present application, complete the sealing of the top of the pack P of the previous figures. This pack, in fact, reaches the chamber 15 for the vacuum with the bottom completely welded and with the top partially welded and is suitably positioned inside the lower container 16 of said chamber 15. The lid 19, in this phase, hermetically closes this chamber 15 for the vacuum.

Mediante il presente dispositivo di saldatura con azionamento a doppia leva le due barre 5 e 5' di saldatura possono passare con la velocità voluta dalla posizione aperta alla posizione chiusa e viceversa. Per passare ad esempio dalla posizione aperta di figure 1 e 2 alla posizione chiusa di figure 3 e 4, nella quale le barre 5 e 5' di saldatura completano la saldatura della cima del pacco, il motore 12 viene azionato in modo che l'albero Il faccia ruotare di circa 90° la piastra 9 in direzione della freccia R di fig. 1. Contemporaneamente alla rotazione della piastra 9 si ha anche una rotazione sincrona delle leve arcuate 8 e 8' attorno ai rispettivi perm lO e lO' di rotazione, in direzione opposta rispetto alla direzione R della piastra 9 di supporto. By means of the present welding device with double lever actuation, the two welding bars 5 and 5 'can pass with the desired speed from the open position to the closed position and vice versa. To pass, for example, from the open position of Figures 1 and 2 to the closed position of Figures 3 and 4, in which the welding bars 5 and 5 'complete the welding of the top of the pack, the motor 12 is operated so that the shaft The causes the plate 9 to rotate by approximately 90 ° in the direction of the arrow R of fig. 1. Simultaneously with the rotation of the plate 9 there is also a synchronous rotation of the arcuate levers 8 and 8 'around the respective permits 10 and 10' of rotation, in the opposite direction with respect to the direction R of the support plate 9.

Al termine di tale rotazione della piastra 9 le parti terminali 208 e 208' delle leve 8 e 8' avranno ruotato anch'esse di 90° in direzione della freccia R, mentre le parti finali 108 e 108' delle stesse, e quindi le barre 5 e 5' di saldatura, si saranno avvicinate l'una all'altra, si confrontino a tal proposito le figure 1 e 3 e le figure 2 e 4. Nel passaggio dalla posizione aperta alla posizione chiusa, o VIceversa, una delle due leve passa sotto all'altra, in questo caso la leva arcuata 8' passa sotto alla leva 8, pertanto tali leve 8 e 8' sono atte ad incrociarsi senza, naturalmente, alcuna interferenza reciproca. Per passare dalla posizione chiusa alla posizione aperta, quando le barre 5 e 5' avranno terminato la saldatura della cima del pacco, sarà necessario azionare il motore in modo che la piastra 9 compia una rotazione di circa 90° nella direzione della freccia R' di fig. 3 opposta alla direzione della freccia R di fig. 1. Come si può osservare, al termine della rotazione i perni lO e lO' di rotazione delle parti finali 208 e 208' delle rispettive leve arcuate 8 e 8' sono sempre in posizione diametralmente opposta sulla piastra 9. At the end of this rotation of the plate 9, the end parts 208 and 208 'of the levers 8 and 8' will also have rotated by 90 ° in the direction of the arrow R, while the final parts 108 and 108 'of the same, and therefore the bars 5 and 5 'of welding, will have approached each other, compare figures 1 and 3 and figures 2 and 4 in this regard. In the passage from the open position to the closed position, or VIceversa, one of the two levers passes under the other, in this case the arched lever 8 'passes under the lever 8, therefore these levers 8 and 8' are able to cross each other without, of course, any mutual interference. To pass from the closed position to the open position, when the bars 5 and 5 'have finished welding the top of the pack, it will be necessary to operate the motor so that the plate 9 performs a rotation of about 90 ° in the direction of the arrow R' of fig. 3 opposite the direction of the arrow R of fig. 1. As can be seen, at the end of the rotation the rotation pins 10 and 10 'of the final parts 208 and 208' of the respective arcuate levers 8 and 8 'are always in a diametrically opposite position on the plate 9.

In funzione della dimensione e della forma delle leve arcuate, così come della distanza tra le relative parti mobili, l'angolo di rotazione impartito dal motore 12 alla piastra 9 potrà essere diverso da 90°. Depending on the size and shape of the arched levers, as well as on the distance between the relative moving parts, the angle of rotation imparted by the motor 12 to the plate 9 may be different from 90 °.

La velocità di avvicinamento e allontanamento degli delle barre 5 e 5' di saldatura à ̈ variabile, a parità di velocità di rotazione del motore 12 ed in particolare la velocità di avvicinamento iniziale, come quella di allontanamento finale nella fase opposta, di tali due barre 5 e 5' à ̈ elevata, mentre quando le stesse SI trovano ad una distanza sufficientemente breve, SI ha un deciso rallentamento del loro avvicinamento, fino alla situazione di distanza minima di figure 3 e 4. Pertanto tali barre 5 e 5' SI aVVICInanO velocemente ai lembi di pacco da saldare mentre, quando tali barre saranno in prossimità di detti lembi ed entreranno in contatto con gli stessi, subiranno un deciso rallentamento, in modo da avere il tempo adeguato per operare la saldatura. Allo stesso modo, durante il loro allontanamento, tali barre 5 e 5' avranno sostanzialmente una prima fase di distacco dai lembi del pacco relativamente lenta ed una seconda fase di allontanamento reciproco relativamente veloce, In modo da permettere al pacco di passare attraverso le stesse nuovamente in posizione aperta, come nelle figure 1 e 2. The speed of approaching and moving away of the welding bars 5 and 5 'is variable, with the same speed of rotation of the motor 12 and in particular the speed of initial approach, as well as the speed of final removal in the opposite phase, of these two bars 5 and 5 'is high, while when they are at a sufficiently short distance, there is a marked slowdown in their approach, up to the situation of minimum distance of figures 3 and 4. Therefore such bars 5 and 5' quickly to the edges of the pack to be welded while, when these bars are close to said edges and come into contact with them, they will undergo a decisive slowdown, in order to have adequate time to operate the welding. In the same way, during their removal, these bars 5 and 5 'will substantially have a first phase of relatively slow detachment from the edges of the pack and a second phase of relatively fast reciprocal removal, so as to allow the pack to pass through them again. in the open position, as in figures 1 and 2.

In fig. 5 e fig. 6 à ̈ illustrata una seconda forma esecutiva del presente dispositivo applicato a macchine impacchettatrici automatiche per il confezionamento di pacchi non sottovuoto e comprendente una struttura 21 di supporto nella quale sono ricavate le due guide 2 e 2' orizzontali e parallele. In tale macchina impacchettatrice ciascun pacco P proveniente da un elemento tubolare formatore, non illustrato, deve essere saldato trasversalmente sulla cima e sul fondo ed inoltre i pacchi in sequenza devono essere separati l'uno dall'altro. La struttura 21 di supporto à ̈ naturalmente provvista di un' apertura centrale 23 per il passaggio di ciascun pacco P. Le piastre 4 e 4' supportano in questo caso delle doppie barre 22 e 22' di saldatura. La barra 22 comprende una testa superiore 122 ed una testa inferiore 222 di saldatura tra le quali à ̈ ricavata una sede 322 di alloggiamento di un utensile, non illustrato, di taglio e separaZIOne di un pacco dall' altro nel processo di impacchettamento. Tale utensile di taglio sarà provvisto di relativi attuatori che gli consentono alternativamente di uscire da detta sede 322 e di rientrare nella stessa. La barra 22' comprende anch' essa due teste 122' e 222' di saldatura, allineate trasversalmente alle teste 122 e 222 della barra 22. Tra tali teste à ̈ ricavata una sede 322' nella quale à ̈ alloggiata una controlama, non illustrata, atta a cooperare con l'utensile di taglio fuoriuscente dalla sede 322 della barra 22. I mezzi di azionamento a doppia leva di tali barre 22 e 22' sono del tutto simili a quanto descritto per la prima forma esecutiva del dispositivo, pertanto a numeri uguali corrispondono uguali elementi rispetto a quanto descritto nelle figure 1-4. A ciascuna delle piastre 4 e 4' à ̈ anche collegato un elemento 24 e 24' di supporto di un apparato piegatore dei lembi di film in materiale plastico di due lati opposti della cima o del fondo del pacco, preferibilmente i due lati corti del pacco. Tale apparato piegatore comprende due piastre 25 e 25' di piegatura atte ad avvicinarsi ed allontanarsi reciprocamente in direzione longitudinale, cioà ̈ in direzione ortogonale rispetto alla direzione trasversale di scorrimento alternato delle barre 22 e 22' lungo le guide 2 e 2'. Ciascuna delle due piastre 25 e 25' à ̈ provvista di un'estremità opportunamente appuntita per piegare i lembi della cima o del fondo del pacco P e su di esse à ̈ posizionato un perno 26 e 26'. Tale perno 26 e 26' à ̈ alloggiato all'interno di una pista 27 e 27' a camma collegata al rispettivo elemento 24 e 24' di supporto. In fig. 5 and fig. 6 illustrates a second embodiment of the present device applied to automatic packing machines for packaging non-vacuum packs and comprising a support structure 21 in which the two horizontal and parallel guides 2 and 2 'are formed. In this packing machine each pack P coming from a tubular forming element, not shown, must be welded transversely on the top and bottom and furthermore the packs in sequence must be separated from each other. The support structure 21 is naturally provided with a central opening 23 for the passage of each pack P. In this case, the plates 4 and 4 'support double welding bars 22 and 22'. The bar 22 comprises an upper head 122 and a lower welding head 222 between which a seat 322 is obtained for housing a tool, not shown, for cutting and separating one pack from the other in the packaging process. Said cutting tool will be provided with relative actuators which allow it alternatively to exit from said seat 322 and to re-enter it. The bar 22 'also includes two welding heads 122' and 222 ', aligned transversely to the heads 122 and 222 of the bar 22. Between these heads there is a seat 322' in which a counter blade is housed, not shown, adapted to cooperate with the cutting tool protruding from the seat 322 of the bar 22. The double lever actuation means of these bars 22 and 22 'are entirely similar to what is described for the first embodiment of the device, therefore with equal numbers the same elements correspond to those described in figures 1-4. To each of the plates 4 and 4 'there is also connected an element 24 and 24' for supporting a folding apparatus for the edges of plastic film of two opposite sides of the top or bottom of the pack, preferably the two short sides of the pack . This bending apparatus comprises two bending plates 25 and 25 'adapted to approach and move away from each other in the longitudinal direction, that is, in the orthogonal direction with respect to the transverse direction of alternating sliding of the bars 22 and 22' along the guides 2 and 2 '. Each of the two plates 25 and 25 'is provided with a suitably pointed end to fold the edges of the top or bottom of the pack P and a pin 26 and 26' is positioned on them. Said pin 26 and 26 'is housed inside a cam track 27 and 27' connected to the respective support element 24 and 24 '.

Per passare dalla posizione aperta di figure 5 e 6 alla pOSIZIOne chiusa di figure 7 e 8, nella quale le barre 22 e 22' di saldatura effettuano la saldatura della cima di un determinato pacco, la saldatura del fondo del pacco successivo e la separazione di tali pacchi, il motore 12 viene azionato in modo che l'albero Il faccia ruotare di circa 90° la piastra 9, analogamente a quanto visto in fig. 1. Contemporanà ̈amente alla rotazione della piastra 9 si ha la rotazione sincrona delle leve arcuate 8 e 8' attorno ai rispetti vi pernI lO e lO' di rotazione, In direzione opposta rispetto alla direzione di rotazione della piastra 9 di supporto. Al termine di tale rotazione della piastra 9 le parti terminali 208 e 208' delle leve 8 e 8' avranno ruotato anch' esse di 90°, mentre le parti finali 108 e 108' delle stesse, e quindi le barre 22 e 22' di saldatura, si saranno avvicinate l'una all'altra. In sostanza, mediante un'unica rotazione del motore 12 in un verso e per un angolo limitato, si ha la contemporanea traslazione trasversale in avvicinamento delle barre 22 e 22' di saldatura in direzione delle frecce B e B' di fig. 5 e, simultaneamente, la contemporanea traslazione longitudinale In avvicinamento delle due piastre 25 e 25' di piegatura dei lembi del lati corti del pacco in direzione delle frecce A e A' di fig. 5. Per passare dalla posizione chiusa alla posizione aperta, quando le barre 22 e 22' avranno terminato la saldatura della cima di un pacco, la saldatura del fondo di un pacco successivo e la separazione degli stessi, sarà necessario azionare il motore in modo che la piastra 9 compIa una rotazione di circa 90° nella direzione opposta a quanto descritto sopra. To pass from the open position of figures 5 and 6 to the closed position of figures 7 and 8, in which the welding bars 22 and 22 'carry out the welding of the top of a given package, the welding of the bottom of the next package and the separation of these packs, the motor 12 is operated so that the shaft 11 causes the plate 9 to rotate by about 90 °, similarly to what is seen in fig. 1. Simultaneously with the rotation of the plate 9 there is the synchronous rotation of the arcuate levers 8 and 8 'around the respective pins 10 and 10' of rotation, in the opposite direction with respect to the direction of rotation of the support plate 9. At the end of this rotation of the plate 9, the end parts 208 and 208 'of the levers 8 and 8' will also have rotated by 90 °, while the end parts 108 and 108 'of the same, and therefore the bars 22 and 22' of welding, they will have come close to each other. Basically, by means of a single rotation of the motor 12 in one direction and for a limited angle, the welding bars 22 and 22 'are simultaneously transversely approached in the direction of the arrows B and B' of fig. 5 and, simultaneously, the simultaneous longitudinal translation Approaching the two plates 25 and 25 'for folding the flaps of the short sides of the pack in the direction of the arrows A and A' of fig. 5. To pass from the closed position to the open position, when the bars 22 and 22 'have finished the welding of the top of a pack, the welding of the bottom of a subsequent pack and the separation of the same, it will be necessary to operate the motor so that the plate 9 performs a rotation of about 90 ° in the opposite direction to that described above.

Claims (12)

RIVENDICAZIONI 1. Dispositivo di saldatura dei pacchi per macchine impacchettatrici, caratterizzato dal fatto che comprende almeno una coppia di barre (5, 5', 22, 22') di saldatura affacciate l'una verso l'altra e collegate ciascuna ad una relativa leva (8, 8') di azionamento opportunamente sagomata, essendo ciascuna di dette leve (8, 8') collegata da una parte ed in modo ruotabile ad un supporto (9) atto ad essere posto in rotazione mediante opportuni mezzi (11, 12) di azionamento e, dall' altra parte, collegata ad una relativa barra (5, 5', 22, 22') di saldatura atta a muoversi in un senso o nell'altro su opportune guide (2, 2') di scorrimento, essendo il moto rotatorio del supporto (9) trasformato in moto rotatorio sincrono di ciascuna di dette leve (8, 8') e quindi in moto lineare alternativo di dette barre (5,5',22,22') di saldatura. CLAIMS 1. Package sealing device for packaging machines, characterized in that it comprises at least one pair of sealing bars (5, 5 ', 22, 22') facing each other and each connected to a relative lever ( 8, 8 ') of suitably shaped actuation, being each of said levers (8, 8') connected on one side and in a rotatable way to a support (9) able to be rotated by means of suitable means (11, 12) for actuation and, on the other hand, connected to a relative welding bar (5, 5 ', 22, 22') able to move in one direction or the other on suitable sliding guides (2, 2 '), being the rotary motion of the support (9) transformed into synchronous rotary motion of each of said levers (8, 8 ') and then into reciprocating linear motion of said welding bars (5,5', 22,22 '). 2. Dispositivo secondo la rivendicazione 1, caratterizzato dal fatto che a detto supporto (9) à ̈ collegata, mediante un primo perno (lO) di rotazione, una parte finale (208) di una prima leva (8) di detta coppia di leve (8, 8') e, mediante un secondo perno (10') di rotazione, una parte finale (208') di una seconda leva (8') di detta coppia di leve (8, 8'), essendo l'altra parte finale (108, 108') di ciascuna di dette leve (8, 8') collegata a dei mezzi (3, 3', 4, 4',6,6',7,7') di supporto e traslazione di ciascuno dette barre (5, 5',22, 22') di saldatura. 2. Device according to claim 1, characterized in that a final part (208) of a first lever (8) of said pair of levers is connected to said support (9) by means of a first rotation pin (10) (8, 8 ') and, by means of a second rotation pin (10'), a final part (208 ') of a second lever (8') of said pair of levers (8, 8 '), the other being final part (108, 108 ') of each of said levers (8, 8') connected to means (3, 3 ', 4, 4', 6,6 ', 7,7') for supporting and translating each said welding bars (5, 5 ', 22, 22'). 3. Dispositivo secondo la rivendicazione 1, caratterizzato dal fatto che comprende almeno una coppia di elementi piegatori (25, 25') di due lati opposti di ciascun pacco, essendo detti elementi piegatori (25, 25') collegati a detti mezzi (3, 3', 4, 4', 6, 6', 7, 7') di supporto e traslazione di ciascuno dette barre (5, 5', 22, 22') di saldatura in modo da muoversi in contemporanea con detti mezzi (3, 3', 4, 4', 6, 6', 7, 7') di supporto e traslazione. 3. Device according to claim 1, characterized in that it comprises at least one pair of folding elements (25, 25 ') of two opposite sides of each pack, said folding elements (25, 25') being connected to said means (3, 3 ', 4, 4', 6, 6 ', 7, 7') supporting and translating each of said welding bars (5, 5 ', 22, 22') so as to move simultaneously with said means (3 , 3 ', 4, 4', 6, 6 ', 7, 7') of support and translation. 4. Dispositivo secondo la rivendicazione 1, caratterizzato dal fatto che dette leve (8, 8') sono di forma arcuata. 4. Device according to claim 1, characterized in that said levers (8, 8 ') have an arched shape. 5. Dispositivo secondo la rivendicazione 1, caratterizzato dal fatto che durante detta rotazione in un senso o nell' altro del supporto (9), dette leve (8, 8') si incrociano senza alcuna interferenza l'una con l'altra. 5. Device according to claim 1, characterized in that during said rotation in one direction or the other of the support (9), said levers (8, 8 ') cross each other without any interference. 6. Dispositivo secondo la rivendicazione 3, caratterizzato dal fatto che ciascuno di detti elementi piegatori (25, 25') à ̈ provvisto di un almeno un perno (26, 26') alloggiato in una pista (27, 27') a camma collegata a detti mezzi (3, 3', 4, 4', 6, 6', 7, 7') di supporto e traslazione di ciascuno dette barre (5, 5', 22, 22'). 6. Device according to claim 3, characterized in that each of said folding elements (25, 25 ') is provided with at least one pin (26, 26') housed in a track (27, 27 ') with connected cam to said means (3, 3 ', 4, 4', 6, 6 ', 7, 7') for supporting and translating each of said bars (5, 5 ', 22, 22'). 7. Dispositivo secondo la rivendicazione 3, caratterizzato dal fatto che detti elementi piegatori (25, 25') si muovono contemporaneamente in direzione opposta e sostanzialmente ortogonale alla direzione di moto di dette barre (22, 22') di saldatura, le quali SI muovono contemporaneamente ed in direzione opposta lungo dette guide (2, 2 '). 7. Device according to claim 3, characterized in that said folding elements (25, 25 ') move simultaneously in the opposite direction and substantially orthogonal to the direction of motion of said welding bars (22, 22'), which move simultaneously and in the opposite direction along said guides (2, 2 '). 8. Dispositivo secondo la rivendicazione 2, caratterizzato dal fatto che detti primo e secondo perni (10, lO') di rotazione sono posizionati in prossimità della periferia di detto supporto (9). 8. Device according to claim 2, characterized in that said first and second rotation pins (10, 10 ') are positioned in proximity to the periphery of said support (9). 9. Dispositivo secondo la rivendicazione 2, caratterizzato dal fatto che detti primi e secondo perni (10, lO') e quindi dette parti finali (208, 208') delle leve (8, 8') sono collocati su detta piastra (9) in posizioni diametralmente opposte. 9. Device according to claim 2, characterized in that said first and second pins (10, 10 ') and therefore said final parts (208, 208') of the levers (8, 8 ') are placed on said plate (9) in diametrically opposite positions. lO. Dispositivo secondo la rivendicazione 2, caratterizzato dal fatto che dette altre parti finali (108, 108') delle leve (8, 8') sono collegate mediante almeno un perno (7, 7') a delle piastre (4, 4') di supporto di detti organi operativi (5, 5'), essendo dette piastre (4, 4') di supporto montate su pattini o slitte (3,3') scorrevoli lungo dette guide (2, 2'). the. Device according to claim 2, characterized in that said other end parts (108, 108 ') of the levers (8, 8') are connected by at least one pin (7, 7 ') to plates (4, 4') of support of said operating members (5, 5 '), said support plates (4, 4') being mounted on runners or slides (3,3 ') sliding along said guides (2, 2'). 11. Dispositivo secondo la rivendicazione 2, caratterizzato dal fatto che quando il supporto (9) à ̈ posto in rotazione in una determinata direzione (R, R') dette leve (8, 8') ruotano contemporaneamente attorno a detti primo e secondo perni (10, lO') in direzione opposta rispetto a detta determinata direzione (R, R'). 11. Device according to claim 2, characterized in that when the support (9) is rotated in a given direction (R, R '), said levers (8, 8') rotate simultaneously around said first and second pins (10, 10 ') in the opposite direction with respect to said determined direction (R, R'). 12. Dispositivo secondo la rivendicazione 1, caratterizzato dal fatto che detti mezzi (11, 12) azionamento di detto supporto, dette leve (8, 8') e dette barre (5, 5') di saldatura con relative guide (2, 2') di scorrimento sono alloggiati all'interno di una camera (15) per il confezionamento12. Device according to claim 1, characterized in that said means (11, 12) actuate said support, said levers (8, 8 ') and said welding bars (5, 5') with relative guides (2, 2 ') are housed inside a chamber (15) for packaging
IT000058A 2011-05-26 2011-05-26 "PACKAGE WELDING DEVICE WITH DOUBLE LEVER DRIVE FOR PACKAGING MACHINES". ITGE20110058A1 (en)

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Application Number Priority Date Filing Date Title
IT000058A ITGE20110058A1 (en) 2011-05-26 2011-05-26 "PACKAGE WELDING DEVICE WITH DOUBLE LEVER DRIVE FOR PACKAGING MACHINES".
PCT/EP2012/059556 WO2012160077A1 (en) 2011-05-26 2012-05-23 Device with double-lever actuation for welding of packages, for packaging machines

Applications Claiming Priority (1)

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IT000058A ITGE20110058A1 (en) 2011-05-26 2011-05-26 "PACKAGE WELDING DEVICE WITH DOUBLE LEVER DRIVE FOR PACKAGING MACHINES".

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US9840346B2 (en) * 2013-11-01 2017-12-12 Frito-Lay North America, Inc. Method and apparatus for making a structurally resilient package
US9969143B2 (en) * 2015-11-10 2018-05-15 Khs Gmbh Bag forming apparatus
IT201600129829A1 (en) * 2016-12-22 2018-06-22 Altopack Spa Apparatus for forming the head of food bags.
EP3953154B1 (en) * 2019-04-12 2024-03-27 Closac Ag Welding unit

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US4079662A (en) * 1976-11-30 1978-03-21 Triangle Package Machinery Company Bag making machine
EP0380868A2 (en) * 1989-01-31 1990-08-08 Kliklok Corporation Sealing apparatus and method for bags
EP2319766A1 (en) * 2008-08-08 2011-05-11 Ulma Packaging Technological Center, S.Coop. Vertical packaging system and method

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US4079662A (en) * 1976-11-30 1978-03-21 Triangle Package Machinery Company Bag making machine
EP0380868A2 (en) * 1989-01-31 1990-08-08 Kliklok Corporation Sealing apparatus and method for bags
EP2319766A1 (en) * 2008-08-08 2011-05-11 Ulma Packaging Technological Center, S.Coop. Vertical packaging system and method

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