NL1008645C2 - Heat sealing device for making packaging from synthetic film material - Google Patents

Heat sealing device for making packaging from synthetic film material Download PDF

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Publication number
NL1008645C2
NL1008645C2 NL1008645A NL1008645A NL1008645C2 NL 1008645 C2 NL1008645 C2 NL 1008645C2 NL 1008645 A NL1008645 A NL 1008645A NL 1008645 A NL1008645 A NL 1008645A NL 1008645 C2 NL1008645 C2 NL 1008645C2
Authority
NL
Netherlands
Prior art keywords
heat
sealing
heat transfer
housing
houses
Prior art date
Application number
NL1008645A
Other languages
Dutch (nl)
Inventor
Heronimus Bernardus Mich Dames
Original Assignee
Dameta V O F
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 Dameta V O F filed Critical Dameta V O F
Priority to NL1008645A priority Critical patent/NL1008645C2/en
Application granted granted Critical
Publication of NL1008645C2 publication Critical patent/NL1008645C2/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
    • 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
    • B29C65/02—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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/242—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool the heat transfer being achieved by contact, i.e. a heated tool being brought into contact with the welding tool and afterwards withdrawn from it
    • 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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • B29C65/743—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 the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7437—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 the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a perforating tool
    • 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
    • B29C65/743—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 the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7441—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 the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc for making welds and cuts of other than simple rectilinear form
    • 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
    • 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
    • B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—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 being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83541—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement
    • B29C66/83543—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement cooperating flying jaws
    • 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
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
    • 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
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/54—Cards, coupons, or other inserts or accessories
    • B65D75/56—Handles or other suspension means
    • B65D75/566—Hand holes or suspension apertures

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Package Closures (AREA)

Abstract

The heat transfer surface is provided in a separate casing (6) releasably coupled to the casing (5) for the heater (3). A heat sealing device (1) made from a thermally conductive material is used to weld together a number of layers of film material, and contains a heater (3) housed inside a casing (5) releasably coupled to a heat transfer casing (6) providing a heat transfer surface. Independent claims are also included for: (a) the heater casing, provided with a relief pattern contact surface, (b) the heat transfer casing, provided with a relief pattern contact surface, (c) a heat sealing machine comprising two of these devices, in which the heat transfer surface is releasably coupled to the heater, and (d) packaging sealed using this heat sealing machine.

Description

J JB/MB/Dames1J JB / MB / Ladies 1

SMELTLASWANG VOOR HET SMELTLASSEN VAN EEN AANTAL LAGEN FOLIEMATERIAAL, SMELTLASINRICHTING VOORZIEN VAN EEN SMELTLASBEK UIT TWEE VAN DERGELIJKE SMELTLASWANGEN EN VERPAKKING AFGESLOTEN DOOR DE TUSSENKOMST VAN EEN DERGE-LIJKE SMELTLASINRICHTINGMELT WELDING CRACK FOR MELT WELDING A NUMBER OF LAYERS OF FILM MATERIAL, MELT WELDING APPARATUS INCLUDING A MELT WELDING BEAK FROM TWO OF SUCH MELT WELDING WANDS AND PACKAGING CLOSED BY THE INTERMEDIATE OF A LESELY MELT

De uitvinding heeft betrekking op een smeltlas-wang volgens de aanhef van conclusie 1.The invention relates to a heat-sealing cheek according to the preamble of claim 1.

Een dergelijke smeltlaswang is bekend voor het smeltlassen of het zogenaamde "heatsealen" van foliemate-5 riaal ter verkrijging van een afgesloten verpakking uit bijvoorbeeld een warmtevervormbaar kunststof materiaal. Onder smeltlassen wordt het lassen verstaan terwijl de te verbinden einden van het foliemateriaal tot smeltens toe worden verhit.Such a heat-sealing cheek is known for heat-sealing or the so-called "heat sealing" of film material in order to obtain a sealed package of, for example, a heat-deformable plastic material. Heat sealing is understood to mean welding while the ends of the foil material to be joined are heated to a melting point.

10 Een dergelijke bekende smeltlaswang bestaat uit één geheel, waarbij de warmtebron en het warmteoverdra-gende oppervlak zijn opgenomen in één enkel huis.Such a known heat-sealing cheek consists of one piece, the heat source and the heat transferring surface being contained in a single housing.

Een dergelijke smeltlaswang, in het bijzonder het warmtedragende oppervlak is zeer sterk onderhevig aan 15 slijtage.Such a heat-sealing cheek, in particular the heat-bearing surface, is very subject to wear.

Wanneer een dergelijke bekende smeltlaswang vervangen dient te worden, wordt eerst de smeltlasinrich-ting uitgeschakeld, de smeltlaswang afgekoeld, de smeltlaswang losgekoppeld van de smeltlasinrichting, vervol-20 gens wordt een nieuwe smeltlaswang aangebracht en wordt deze smeltlaswang opgewarmd waarna vervolgens de smeltlasinrichting wordt aangeschakeld. Wanneer telkens een nieuwe smeltlaswang wordt aangebracht, dient deze te worden gekalibreerd daar de juiste positie van een smelt-25 laswang in het bijzonder ten opzichte van de andere overeenkomstige smeltlaswang van de smeltlasbek in een smeltlasinrichting cruciaal is voor zijn goede werking.When such a known heat-sealing cheek has to be replaced, the heat-sealing device is first switched off, the heat-sealing cheek is cooled, the heat-sealing cheek is disconnected from the heat-sealing device, then a new heat-sealing cheek is applied and this heat-sealing cheek is then switched on. Each time a new heat seal cheek is fitted, it must be calibrated since the correct position of a heat seal cheek especially with respect to the other corresponding heat seal jaw of the heat seal jaw in a heat seal device is critical to its proper operation.

Niet alleen is een dergelijke lange onderbreking bij elke vervanging ongewenst en arbeidsintensief, 30 doch ook het vereiste materiaal en de kostprijs voor elke 1008645 2 vervanging van een bekende smeltlaswang stelt een aanzienlijk probleem.Not only is such a long interruption with every replacement undesirable and labor-intensive, but also the required material and the cost price for every replacement of a known heat-sealing cheek poses a considerable problem.

De uitvinding beoogt de hierboven genoemde problemen op te lossen en verschaft daartoe een smeltlas-5 wang volgens conclusie 1.The object of the invention is to solve the above-mentioned problems and for this purpose provides a heat-sealing cheek according to claim 1.

Door het onderling losmaakbaar koppelen van een i warmtebronhuis met een warmteoverdragend huis, dat is voorzien van het warmteoverdragende oppervlak, dient bij slijtage van het warmteoverdragende oppervlak slechts het 10 warmteoverdragende huis te worden vervangen. Wanneer dit warmteoverdragende huis zich reeds op een aangepaste werkingstemperatuur bevindt, dient er enkel een loskoppeling en een bevestiging van het warmteoverdragende huis te gebeuren op het warmtebronhuis. Dit is voordelig qua 15 arbeid en kostprijs en is bovendien materiaalbesparend, daar enkel het voorste deel van een smeltlaswang, namelijk het warmteoverdragende huis, dient te worden vervangen .By mutually releasably coupling a heat source housing to a heat transfer housing, which is provided with the heat transfer surface, only the heat transfer housing has to be replaced when the heat transfer surface is worn. If this heat transfer housing is already at an adjusted operating temperature, only a disconnection and an attachment of the heat transfer housing must be done on the heat source housing. This is advantageous in terms of labor and cost and is moreover material-saving, since only the front part of a heat-sealing cheek, namely the heat-transferring housing, has to be replaced.

Bij voorkeur zijn de beide huizen van een 20 smeltlaswang volgens de uitvinding voorzien van een onderling complementair contactoppervlak voor een innige koppeling van de beide huizen aan elkaar. Hierdoor wordt de warmtegeleiding aanzienlijk verbeterd tussen het warmtebronhuis en het warmteoverdragende huis.The two houses of a heat-sealing cheek according to the invention are preferably provided with a mutually complementary contact surface for an intimate coupling of the two houses to each other. This significantly improves heat conduction between the heat source housing and the heat transfer housing.

25 Proefnemingen hebben uitgewezen dat een vol doende hoge temperatuur aan het warmteoverdragende oppervlak heerst, niettegenstaande de beide huizen losmaakbaar gekoppeld zijn. Het warmteverlies vanaf het warmtebronhuis naar het warmteoverdragende huis is aldus gering.25 Experiments have shown that a sufficiently high temperature prevails on the heat transfer surface, despite the fact that both houses are detachably coupled. The heat loss from the heat source housing to the heat transferring housing is thus small.

30 Eveneens bij voorkeur zijn de huizen van een smeltlaswang volgens de uitvinding onderling losmaakbaar gekoppeld middels verbindingsmiddelen, die zich door ten minste één van de huizen heen uitstrekken. Dergelijke verbindingsmiddelen worden met eenvoudige gereedschappen, 35 zoals inbussleutels of schroevedraaiers beheerst. Dergelijke gereedschappen zijn in het algemeen warmte-geïso-t leerd waardoor er geen afkoeling van het te vervangen j huis dient plaats te vinden.Also preferably, the heat-sealing cheek housings according to the invention are releasably coupled by means of connecting means, which extend through at least one of the houses. Such connecting means are controlled with simple tools, such as Allen keys or screwdrivers. Such tools are generally heat insulated so that there is no need to cool the housing to be replaced.

1008645 31008645 3

Bij voorkeur is de warmtebronhuis van een smeltlaswang volgens de uitvinding voorzien van een snij lichaam in een rechtstreeks warmtegeleidend contact. Door het voorzien van snij lichaam rechtstreeks op het 5 warmtebronhuis zal de temperatuur van het snij lichaam een ietwat hoger zijn dan de temperatuur van het warmteover-dragende huis. Dit is voordelig ter verkrijging van een insnijding in de smeltgelaste verpakking, welke insnijding bijvoorbeeld als een ophanggat kan dienst doen.Preferably, the heat source housing of a heat-sealing cheek according to the invention is provided with a cutting body in a direct heat-conducting contact. By providing the cutting body directly on the heat source housing, the temperature of the cutting body will be somewhat higher than the temperature of the heat transfer housing. This is advantageous in order to obtain an incision in the heat-sealed package, which incision can serve, for example, as a suspension hole.

10 Andere voorkeursuitvoeringsvormen van het warmtebronhuis en het warmteoverdragende huis worden gespecificeerd in de respectievelijke conclusies 4-6 en 7-11.Other preferred embodiments of the heat source housing and the heat transfer housing are specified in claims 4-6 and 7-11, respectively.

De uitvinding heeft eveneens betrekking op een 15 smeltlaswang volgens conclusie 12 en een smeltlasinrich-ting volgens conclusie 13.The invention also relates to a heat-sealing cheek according to claim 12 and a heat-sealing device according to claim 13.

Tevens heeft de uitvinding betrekking op een verpakking die is afgesloten door de tussenkomst van een dergelijke smeltlasinrichting.The invention also relates to a package which is closed by the intervention of such a heat sealing device.

20 De uitvinding zal hieronder nader worden ver duidelijkt aan de hand van de perspectivische tekening waarin een aantal voorkeursuitvoeringsvormen van een smeltlaswang volgens de uitvinding zijn weergegeven. In de tekening toont: 25 figuur 1 een uit elkaar gebrachte smeltlasbek uit twee overeenkomstige smeltlaswangen, figuur 2 een samengevoegde smeltlasbek, en figuur 3 een smeltlasinrichting voorzien van een smeltlasbek volgens figuur 1 of 2.The invention will be explained in more detail below with reference to the perspective drawing in which a number of preferred embodiments of a heat-sealing cheek according to the invention are shown. In the drawing: figure 1 shows a fused welding jaw from two corresponding heat sealing jaws, figure 2 a combined fusion welding jaw, and figure 3 a fusion welding device provided with a fusion welding jaw according to figure 1 or 2.

30 Figuur 1 toont een smeltlasbek 17 die is samen- steld uit twee smeltlaswangen 1. Elke smeltlaswang 1 is op haar beurt samengesteld uit een warmtebronhuis 5 en een warmteoverdragend huis 6. Het warmtebronhuis 5 is voorzien van een warmtebron 3, bijvoorbeeld een elektri-35 sche weerstanddraad. Een warmteoverdragend oppervlak 4 is voorzien op de voorzijde van het warmteoverdragende huis 6. Beide huizen 5, 6 zijn voorzien van een complementair in elkaar passend contactoppervlak 7, 8, waardoor een 1008645 4 innige aansluiting kan worden verkregen tussen de beide huizen waardoor de warmtegeleiding energetisch voordelig verloopt. De beide huizen 5, 6 worden onderling gekoppeld via de verbindingsmiddelen 9 die zich door ten minste één 5 van de huizen 5, 6 heen uitstrekken. Andere verbindingsmiddelen 9' kunnen voorzien zijn ter koppeling van het warmtebronhuis 5 aan de smeltlasinrichting.Figure 1 shows a heat-sealing jaw 17 composed of two heat-sealing cheeks 1. Each heat-sealing cheek 1 is in turn composed of a heat source housing 5 and a heat transfer housing 6. The heat source housing 5 is provided with a heat source 3, for example an electric resistance wire. A heat transfer surface 4 is provided on the front of the heat transfer housing 6. Both houses 5, 6 are provided with a complementary mating contact surface 7, 8, whereby a 1008645 4 intimate connection can be obtained between the two houses, whereby the heat conduction is energetically advantageous. The two houses 5, 6 are mutually coupled via the connecting means 9 which extend through at least one of the houses 5, 6. Other connection means 9 'may be provided for coupling the heat source housing 5 to the heat sealing device.

Voor dit doel kunnen eveneens openingen 10 in het warmteoverdragende huis 6 zijn voorzien. De comple-10 mentaire contactoppervlakken 7, 8 zijn voorzien van een reliëf 7a, 8a waardoor dit oppervlak groter wordt waardoor een nog betere warmteoverdracht tussen de huizen plaatsvindt. Hierdoor kan het warmteverlies.nog meer geminimaliseerd worden. Het reliëf 7a is voorzien van een 15 gleufvormige uitsparing 10 voor de doorgang van een snijmes 11 voor het onderling scheiden van de verkregen verpakking.Openings 10 in the heat transfer housing 6 can also be provided for this purpose. The complementary contact surfaces 7, 8 are provided with a relief 7a, 8a, which increases this surface, so that an even better heat transfer takes place between the houses. This allows the heat loss to be even more minimized. The relief 7a is provided with a slot-shaped recess 10 for the passage of a cutting knife 11 for separating the obtained packaging.

In een innig warmteoverdragend contact is op het contactoppervlak 7 van het warmtebronhuis 5 een 20 snij lichaam 12 voorzien. Een dergelijke rechtstreekse aanbreng van het snij lichaam 12 op het warmtebronhuis 5 is er oorzaak van dat een voldoende hoge temperatuur heerst op de eindrand 28 van het snij lichaam 12, wat zorgt voor een efficiënte doorstanzing. Hierdoor wordt 25 een gat in de sealverbinding verkregen.A cutting body 12 is provided on the contact surface 7 of the heat source housing 5 in an intimate heat transferring contact. Such a direct application of the cutting body 12 to the heat source housing 5 causes a sufficiently high temperature to prevail on the end edge 28 of the cutting body 12, which ensures efficient penetration. This creates a hole in the seal connection.

Voor de doortocht van het snij lichaam 12 is een uitsparing 16 voorzien in het warmteoverdragende huis 4. Zo is het mogelijk (niet in de tekening weergegeven), dat het overeenkomstige tweede warmteoverdragend huis, dat 30 niet voorzien is van een snijlichaam, op de overeenkomstige plaats van het snijlichaam 12 voorzien kan zijn van een stootdeel uit een harder materiaal, dat werkzaam is als een aambeeld voor het snijlichaam 12. Het is eveneens mogelijk twee snij lichamen 12, die overeenkomstig ten 35 opzichte van elkaar gepositioneerd staan op elke wang te voorzien. Het warmteoverdragende oppervlak 4 is voorzien van een ribbelreliëf 13 en een gleufvormige opening 14 voor de doorgang van een snijmes 11.For the passage of the cutting body 12, a recess 16 is provided in the heat-transferring housing 4. It is thus possible (not shown in the drawing) that the corresponding second heat-transferring housing, which is not provided with a cutting body, on the corresponding instead of the cutting body 12 it may be provided with a bump part of a harder material, which acts as an anvil for the cutting body 12. It is also possible to provide two cutting bodies 12, which are positioned correspondingly to each other on each cheek . The heat transfer surface 4 is provided with a rib relief 13 and a slot-shaped opening 14 for the passage of a cutting blade 11.

ij 1 0086 4 5 i 5ij 1 0086 4 5 i 5

Het warmteoverdragende huis 6 kan eveneens voorzien zijn van een temperatuursensor 15 voor het aflezen en de instelling van een geschikt temperatuur voor de smeltlas.The heat transfer housing 6 can also be provided with a temperature sensor 15 for reading and setting a suitable temperature for the heat seal.

5 De schematisch weergegeven smeltlasinrichting 18 bestaat in hoofdzaak uit een frame waarin een beweegbaar gelagerde smeltlasbek 17 volgens de uitvinding is voorzien. Een dergelijke smeltlasbek 17 is opgenomen in een opnameruimte 21 welke horizontaal en verticaal, via 10 de bussen 22 in de richting van de pijlen 26 en 27, gelagerd ligt. Het foliemateriaal 2, dat al dan niet reeds van een overlangse smeltlas is voorzien, wordt in eerste instantie in een bovenpositie aangegrepen door de smeltlasbek 17 en er kan een eerste smeltlas afgedicht 15 worden via een horizontale beweging van de smeltlaswangen 1 naar elkaar toe volgens pijl 26. Tijdens de smeltlasbe-werking wordt het foliemateriaal 2 volgens pijl 27 neerwaarts getrokken waarna deze smeltlas beëindigd is. Deze smeltlas is eveneens voorzien van een ophanggat 25 ver-20 oorzaakt door het snij lichaam 12. Hierna zal de smeltlasbek 27 zich opnieuw in zijn initiële bovenpositie instellen (openen en verticaal opwaarts bewegen) om vervolgens een nieuwe smeltlasverbinding uit te voeren op dezelfde initiële bovenpositie, waarna een volgende 25 cyclus kan aanvangen.The schematically shown heat sealing device 18 mainly consists of a frame in which a movable bearing heat sealing jaw 17 according to the invention is provided. Such a heat-sealing jaw 17 is accommodated in a receiving space 21 which is mounted horizontally and vertically via the bushes 22 in the direction of arrows 26 and 27. The foil material 2, which may or may not already be provided with a longitudinal heat seal, is initially engaged in an upper position by the heat seal jaw 17 and a first heat seal 15 can be sealed via a horizontal movement of the heat seal cheeks 1 towards each other according to arrow 26. During the heat sealing operation, the foil material 2 is drawn down according to arrow 27, after which this heat sealing is finished. This heat seal is also provided with a suspension hole 25 caused by the cutting body 12. After this, the heat seal jaw 27 will return to its initial top position (open and move vertically upward) and then perform a new heat seal connection at the same initial top position. , after which a next 25 cycle can start.

Zoals uit figuur 1 duidelijk blijkt, zijn niet alleen de huizen 5, 6 losmaakbaar gekoppeld, maar eveneens het snij lichaam 12 wat ook deze laatste gemakkelijk uitwisselbaar maakt.As is clear from Figure 1, not only the housings 5, 6 are releasably coupled, but also the cutting body 12, which also makes the latter easily interchangeable.

30 Het is duidelijk dat wanneer het warmteoverdra- gende oppervlak 4 van het warmteoverdragende huis 6, dat door de bewerking aanzienlijk aan slijtage wordt onderworpen, dient te worden vervangen, er slechts een loskoppeling van het warmteoverdragende huis 6 dient te gebeu-35 ren, los van het warmtebronhuis 5, waarna een nieuw warmteoverdragend huis 6 wordt aangebracht op het "oude" warmtebronhuis 5. Wanneer het warmteoverdragende huis 6 reeds voorverwarmd is, gebeurt de uitwisseling met nog 1008645 6 minder tijdverlies. Een vooropwarming van een warmteover-dragend huis 6 kan gebeuren via een afzonderlijk warmte-bronhuis 5 dat naast of in de inrichting als een voorver-warminrichting voor warmteoverdragende huizen werkzaam 5 is. Via de inrichting 18 wordt een verpakking 24 verkregen voorzien van twee naadlasverbindingen 29 en een ophanggat 25.It is clear that when the heat transferring surface 4 of the heat transferring housing 6, which is considerably subjected to wear by the processing, is to be replaced, only a disconnection of the heat transferring housing 6 must be performed, loose from the heat source housing 5, after which a new heat transfer housing 6 is applied to the "old" heat source housing 5. When the heat transfer housing 6 has already been preheated, the exchange takes place with a further 1008645 6 less time loss. Preheating of a heat transfer housing 6 can be effected via a separate heat source housing 5 which acts as a preheater for heat transfer houses next to or in the device. Via the device 18, a package 24 is obtained, provided with two seam-sealing connections 29 and a suspension hole 25.

V 1 008645 iV 1 008645 i

Claims (15)

1. Smeltlaswang uit een warmtegeleidend materiaal, voor het smeltlassen van een aantal lagen foliemate-riaal, voorzien van een warmtebron en een warmteover-dragend oppervlak, met het kenmerk, dat de warmtebron is 5 opgenomen in een warmtebronhuis en het warmteoverdragende oppervlak voorzien is op een warmteoverdragend huis waarbij de huizen onderling losmaakbaar gekoppeld zijn.1. Heat-sealing material of a heat-conducting material, for heat-sealing a number of layers of foil material, provided with a heat source and a heat-transferring surface, characterized in that the heat source is incorporated in a heat-source housing and the heat-transferring surface is provided on a heat transferring house where the houses are detachably coupled. 2. Smeltlaswang volgens conclusie 1, met het kenmerk, dat de huizen elk voorzien zijn van een onder- 10 ling complementair contactoppervlak voor een innige koppeling van de beide huizen aan elkaar.2. Heat-sealing cheek according to claim 1, characterized in that the houses are each provided with a mutually complementary contact surface for an intimate coupling of the two houses to each other. 3. Smeltlaswang volgens conclusie 1 of 2, met het kenmerk, dat de huizen middels verbindingsmiddelen, die zich door ten minste één van de huizen heen uitstrek- 15 ken, onderling gekoppeld zijn.3. Heat-sealing cheek according to claim 1 or 2, characterized in that the houses are mutually coupled by means of connecting means extending through at least one of the houses. 4. Warmtebronhuis kennelijk geschikt voor een smeltlaswang volgens conclusie 1, 2 of 3 voorzien van een warmtebron en een contactoppervlak, met het kenmerk, dat het contactoppervlak voorzien is van een reliëf.Heat source housing apparently suitable for a heat-sealing cheek according to claim 1, 2 or 3 provided with a heat source and a contact surface, characterized in that the contact surface is provided with a relief. 5. Warmtebronhuis volgens conclusie 4, met het kenmerk, dat het reliëf een gleufvormige uitsparing omvat voor de doorgang van een snijmes.Heat source housing according to claim 4, characterized in that the relief comprises a slot-shaped recess for the passage of a cutting blade. 6. Warmtebronhuis volgens conclusie 4 of 5, met het kenmerk, dat een snij lichaam in een warmtegeleidend 25 contact is voorzien op het contactoppervlak.6. Heat source housing according to claim 4 or 5, characterized in that a cutting body is provided with a heat-conducting contact on the contact surface. 7. Warmteoverdragend huis voorzien van een warmteoverdragend oppervlak, een contactoppervlak en kennelijk geschikt voor een smeltlaswang volgens conclusie 1, 2 of 3, met het kenmerk, dat het warmteoverdragen- 30 de huis aan het contactoppervlak voorzien is van een reliëf.7. Heat transfer housing provided with a heat transfer surface, a contact surface and apparently suitable for a heat-sealing cheek according to claim 1, 2 or 3, characterized in that the heat transfer housing is provided with a relief on the contact surface. 8. Warmteoverdragend huis volgens conclusie 7, met het kenmerk, dat het warmteoverdragende oppervlak voorzien is van ribbels en een gleufvormige opening voor 35 de doorgang van een snijmes. 1008645 8 ·8. Heat transfer housing according to claim 7, characterized in that the heat transfer surface is provided with ridges and a slot-shaped opening for the passage of a cutting blade. 1008645 8 9. Warmteoverdragend huis volgens conclusie 7 of 8, met het kenmerk, dat het warmteoverdragende huis I voorzien is van een temperatuursensor.Heat transfer housing according to claim 7 or 8, characterized in that the heat transfer housing I is provided with a temperature sensor. 10. Warmteoverdragend huis volgens conclusie 7, 5 8 of 9, met het kenmerk, dat het warmteoverdragende huis voorzien is van een uitsparing voor de doorgang van een snij lichaam.10. Heat transfer housing according to claim 7, 8 or 9, characterized in that the heat transfer housing is provided with a recess for the passage of a cutting body. 11. Warmteoverdragend huis volgens conclusie 7, 8 of 9, met het kenmerk, dat een deel van het warmteover- 10 dragende oppervlak is gevormd uit een hard materiaal dat als een aambeeld voor het snij lichaam werkzaam is.11. Heat transfer housing according to claim 7, 8 or 9, characterized in that part of the heat transfer surface is formed from a hard material which acts as an anvil for the cutting body. 12. Smeltlaswang voorzien van een warmtebron-huis volgens één der conclusies 4-6, een warmteoverdragend huis volgens één der conclusies 7-11 en verbindings- 15 middelen voor het onderling koppelen van de huizen.12. Heat sealing jaw provided with a heat source housing according to any one of claims 4-6, a heat transferring housing according to any one of claims 7-11 and connecting means for interconnecting the housings. 13. Smeltlasinrichting, die voorzien is van een smeltlasbek uit twee smeltlaswangen waartussen een aantal lagen foliemateriaal kan worden samengelast door een aanvoer en een overdracht van warmte vanaf de smeltlasbek 20 naar het foliemateriaal, waarbij elk van de smeltlaswangen voorzien is van een verwarmingsbron voor de aanvoer van warmte en een warmteoverdragend oppervlak, met het kenmerk, dat het warmteoverdragende oppervlak los-- maakbaar gekoppeld is met de verwarmingsbron.13. Heat sealing device, comprising a heat sealing jaw of two heat sealing jaws between which a number of layers of foil material can be welded together by a feed and a transfer of heat from the heat sealing jaw 20 to the foil material, each of the heat sealing jaws being provided with a heating source for the feed of heat and a heat transferring surface, characterized in that the heat transferring surface is releasably coupled to the heating source. 14. Smeltlasinrichting, die voorzien is van een smeltlasbek uit twee smeltlaswangen volgens één der conclusies 1, 2 of 3.Melt-sealing device, comprising a heat-sealing jaw of two heat-sealing cheeks according to any one of claims 1, 2 or 3. 15. Verpakking afgesloten door de tussenkomst van een smeltlasinrichting volgens conclusie 13 of 14. 30 ;= j ... __ 1 008645Packaging sealed by the intermediary of a heat sealing device according to claim 13 or 14. 30 = 1 ... 008645
NL1008645A 1998-03-19 1998-03-19 Heat sealing device for making packaging from synthetic film material NL1008645C2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1228853A2 (en) * 2001-02-06 2002-08-07 I.L.P.R.A. S.P.A. Apparatus for welding sheet material
EP2565017A1 (en) * 2011-09-05 2013-03-06 Mespack, S.L. Welding unit for an automatic container forming and filling machine
US20140223861A1 (en) * 2010-05-25 2014-08-14 Frito-Lay North America, Inc. Easy open bag
EP2921283A1 (en) * 2014-03-21 2015-09-23 Roland Schierle Seal device
WO2016111691A1 (en) * 2015-01-08 2016-07-14 Colgate-Palmolive Company Devices and methods for making a pouch

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US3484325A (en) * 1966-07-13 1969-12-16 John M Pendleton Apparatus for sealing thermoplastic films
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GB2033296A (en) * 1978-10-18 1980-05-21 Rovema Gmbh Welding die for packaging machines
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DE3018629A1 (en) * 1980-05-16 1981-11-26 Lieder Maschinenbau GmbH & Co KG, 3033 Schwarmstedt Welding lid to container - where appts. used has welding base fixed on guide seated in ball and socket
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US4630429A (en) * 1985-02-01 1986-12-23 Baxter Travenol Laboratories, Inc. Apparatus and method for sealing a web of film in a form, fill, and seal packaging system
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US3484325A (en) * 1966-07-13 1969-12-16 John M Pendleton Apparatus for sealing thermoplastic films
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DE3018629A1 (en) * 1980-05-16 1981-11-26 Lieder Maschinenbau GmbH & Co KG, 3033 Schwarmstedt Welding lid to container - where appts. used has welding base fixed on guide seated in ball and socket
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JPH024608A (en) * 1988-06-13 1990-01-09 Hitachi Battery Hanbai Service Kk Packaging apparatus
US5056295A (en) * 1991-01-22 1991-10-15 Reynolds Metals Company Cutter and sealer for film
US5277745A (en) * 1991-11-27 1994-01-11 Reynolds Metals Company Sever and seal bar having interchangeable inserts and blades

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1228853A2 (en) * 2001-02-06 2002-08-07 I.L.P.R.A. S.P.A. Apparatus for welding sheet material
EP1228853A3 (en) * 2001-02-06 2003-01-15 I.L.P.R.A. S.P.A. Apparatus for welding sheet material
US20140223861A1 (en) * 2010-05-25 2014-08-14 Frito-Lay North America, Inc. Easy open bag
EP2565017A1 (en) * 2011-09-05 2013-03-06 Mespack, S.L. Welding unit for an automatic container forming and filling machine
EP2921283A1 (en) * 2014-03-21 2015-09-23 Roland Schierle Seal device
WO2016111691A1 (en) * 2015-01-08 2016-07-14 Colgate-Palmolive Company Devices and methods for making a pouch

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