DE2640582C3 - Manufacture of an air cushion sheet from thermoplastics - Google Patents

Manufacture of an air cushion sheet from thermoplastics

Info

Publication number
DE2640582C3
DE2640582C3 DE2640582A DE2640582A DE2640582C3 DE 2640582 C3 DE2640582 C3 DE 2640582C3 DE 2640582 A DE2640582 A DE 2640582A DE 2640582 A DE2640582 A DE 2640582A DE 2640582 C3 DE2640582 C3 DE 2640582C3
Authority
DE
Germany
Prior art keywords
air cushion
cushion sheet
thermoplastics
manufacture
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE2640582A
Other languages
German (de)
Other versions
DE2640582B2 (en
DE2640582A1 (en
Inventor
Tetsuo 4000 Duesseldorf Kawasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE2640582A priority Critical patent/DE2640582C3/en
Publication of DE2640582A1 publication Critical patent/DE2640582A1/en
Publication of DE2640582B2 publication Critical patent/DE2640582B2/en
Application granted granted Critical
Publication of DE2640582C3 publication Critical patent/DE2640582C3/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/144—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/30—Making multilayered or multicoloured articles
    • B29C43/305—Making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/18—Thermoforming apparatus
    • B29C51/20—Thermoforming apparatus having movable moulds or mould parts
    • B29C51/22—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis
    • B29C51/225—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis mounted on a vacuum drum
    • 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/0608—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
    • B29C61/0616—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms layered or partially layered preforms, e.g. preforms with layers of adhesive or sealing compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B65D65/403—Applications of laminates for particular packaging purposes with at least one corrugated layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0028—Stretching, elongating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • B32B2307/736—Shrinkable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • B32B2553/02—Shock absorbing
    • B32B2553/026—Bubble films

Landscapes

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

Description

Die Erfindung betrifft das Herstellen einer Luftpolsterbahn aus thermoplastischen Kunststoffen, bei dem in eine Bahn für eine Grundschicht kontinuierlich eine Vielzahl von napfförmigen Vertiefungen geformt wird und bei dem danach gleichzeitig eine Bahn für eine die Vertiefungen abschließende Deckschicht sowie eine Bahn für eine auf der Deckschicht angeordnete Oberflächenschicht aufgebracht und mit der jeweils vorhergehenden Schicht verbunden werden.The invention relates to the production of an air cushion sheet made of thermoplastics, in which continuous one in a web for a base coat Plurality of cup-shaped depressions is formed and then at the same time a path for one of the Cover layer terminating depressions and a path for one arranged on the cover layer Surface layer applied and connected to the previous layer.

Ein derartiges Herstellen einer Luftpolsterbahn ist bekannt (DE-OS 21 61 054). Luftpolsterbahnen werden zum Schützen von Gegenständen während des Transportes vor StöLicn oder ähnlichen Beschädigungen verwendet. Bei Verwendung von L/ftpolsterbahnen ist eine zusätzliche Befestigung oder Umhüllung notwendig, um den zu schützenden Gef-instand dicht zu umgeben.Such a production of an air cushion sheet is known (DE-OS 21 61 054). Bubble sheets will be to protect objects from collisions or similar damage during transport used. When using L / ft upholstery sheets, additional fastening or wrapping is necessary. in order to tightly surround the vessel to be protected.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Luftpolsterbahn zu schaffen, die bei Wärmezufuhr den zu schützenden Gegenstand eng umhüllt und ihn somit gleichzeitig gegen äußere mechanische Einwirkungen wie gegen Feuchtigkeit und Temperaturschwankungen schützt.The invention is therefore based on the object of a To create air cushion webs which, when heat is supplied, envelops the object to be protected tightly and thus surrounds it at the same time against external mechanical influences such as moisture and temperature fluctuations protects.

Die Aufgabe wird gemäß der Erfindung durch die Verwendung einer Schrumpffolie als Oberflächenschicht gelöst.The object is achieved according to the invention through the use of a shrink film as the surface layer solved.

Die Schrumpffolie verbindet sich während der Herstellung der Luftpolstcrbahn mit der Deckschicht in einem Wärmebereich, in welchem cjer Kunststoff der Deckschicht noch nicht erkaltet und daher noch klebrig ist, in welchem aber der vorgespannte Zustand der Schrumpffolie noch nicht aufgehoben wird. Die auf diese Weise hergestellte Luftpolsterbahn besitzt andererseits die Eigenschaft einer Schrumpffolie, weil sie infolge ihrer leichten Verformbarkeit dem Schrumpfvorgang nachgeben kann und andererseits die Eigenschaften einer Isolierfolie. Damit ist es möglich, mit einer derartigen Luftpolsterbahn den zu schützenden Gegenstand eng zu umhüllen und ihn dabei gleichzeitig gegen äußere Einwirkungen zu schützen.The shrink film is bonded to the top layer during the manufacture of the air-cushioned sheet a warm area in which the plastic of the top layer has not yet cooled down and is therefore still sticky is, in which, however, the pre-tensioned state of the shrink film is not yet canceled. The on On the other hand, the air cushion sheet produced in this way has the property of a shrink film because it can give in to the shrinking process due to their easy deformability and, on the other hand, the properties an insulating film. This makes it possible to use such an air cushion sheet to protect the To enclose the object tightly and at the same time to protect it against external influences.

In der Zeichnung sind in Fig. 1 bzw. Fig.2 zwei Ausführungsbeispiele des erfindungsgemäßen Herstellens einer Luftpolsterbahn schematisch dargestellt.In the drawing, two are shown in FIG. 1 and FIG Embodiments of the production according to the invention an air cushion sheet shown schematically.

Durch Wärmezufuhr in den flüssigen Zustand gebrachtes Kunststoffgranulat wird durch eine Düse 2 in Form einer Bahn 3 extrudiert und gelangt auf eine beheizte, unter Vakuum stehende und sich drehende Formwalze 1, wo die Bahn 3 durch Anwendung von Unterdruck sich der Form der Oberfläche der Formwalze 1 (Fig. 1) anpaßt. Die Düse 2 besitzt eine Länge, die der Breite der erzeugten Bahn 3 entspricht. In gleicher Weise wird von einer Düse 4 verflüssigtes Kunststoffgranulat zu einer Bahn S extrudiert, die als ebene Deckfolie sich mit der auf der Formwalze 1 aufgebrachten Bahn 3 verbindet Der Verbindungsstelle der beiden Bahnen 3 und 5 ist eine Druckwalze 6 zugeordnet, die durch eine Feder 7 elastisch abgestützt ist. Eine Schrumpffolie 8 wird nun der Druckwalze 6 im kalten Zustand zugeführt. An der unter dem Druck der Druckwalze 6 stehenden Verbindungsstelle verbindet sich die kalte Schrumpffolie 8 mit der noch eine Temperatur von etwa 1500C aufweisenden Bahn 5 ohne zu schrumpfen.Plastic granulate brought into the liquid state by the supply of heat is extruded through a nozzle 2 in the form of a web 3 and arrives at a heated, rotating mold roll 1 under vacuum, where the web 3 follows the shape of the surface of the mold roll 1 by the application of negative pressure (Fig. 1) adapts. The nozzle 2 has a length which corresponds to the width of the web 3 produced. In the same way, liquefied plastic granulate is extruded from a nozzle 4 to form a web S, which connects as a flat cover film with the web 3 applied to the forming roller 1. The connection point of the two webs 3 and 5 is assigned a pressure roller 6, which is supported by a spring 7 is elastically supported. A shrink film 8 is now fed to the printing roller 6 in the cold state. At the connection point under the pressure of the pressure roller 6, the cold shrink film 8 connects to the web 5, which is still at a temperature of about 150 ° C., without shrinking.

Bei dem zweiten Ausführungsbeispiel nach Fig.2 wird die Schrumpffolie 8 im Gegensatz zum Ausführungsbeispiel nach Fi g. 1 nicht mit der Bahn 5 sondern mit der genoppten Bahn 3 verbunden. Hierzu werden die von der Formwalze 1 ablaufenden miteinander verbundenen Bahnen 3 und 5 über eine feststehende erwärmte Walze 10 geführt, denen an der Ablaufstelle sowohl eine weitere von einer Düse 11 erzeugte Bahn 12 als auch die Schrumpffolie 8 tangential gemeinsam an der gleichen Stelle zugeführt werden. Auch hierbei wird mittels der elastisch abgestützten Druckwalze 6 der Klebcvorgang unterstützt.In the second embodiment according to FIG the shrink film 8, in contrast to the embodiment according to Fi g. 1 not with the train 5 but connected to the knobbed panel 3. For this purpose, those running down from the forming roller 1 are joined together connected webs 3 and 5 guided over a fixed heated roller 10, which at the drainage point both a further path 12 produced by a nozzle 11 and the shrink film 8 are fed together tangentially at the same point. Here too will the gluing process is supported by means of the elastically supported pressure roller 6.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (1)

Patentanspruch;Claim; Verwendung einer Schrumpffolie als Oberflächenschicht für das Herstellen einer Luftpolsterbahn aus thermoplastischen Kunststoffen, bei dem in eine Bahn für eine Grundschicht kontinuierlich eine Vielzahl von napfförmigen Vertiefungen geformt wird und bei dem danach gleichzeitig eine Bahn für eine die Vertiefungen abschließende Deckschicht sowie eine Bahn für eine auf der Deckschicht angeordnete Oberflächenschicht aufgebracht und mit der jeweils vorhergehenden Schicht verbunden werden.Use of a shrink film as the surface layer for the production of an air cushion sheet from thermoplastics, in which in a A sheet for a base layer is continuously formed with a plurality of cup-shaped depressions is and then at the same time a track for a cover layer closing the wells and a web for a surface layer arranged on the cover layer is applied and connected to the previous layer. ISIS
DE2640582A 1976-09-09 1976-09-09 Manufacture of an air cushion sheet from thermoplastics Expired DE2640582C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2640582A DE2640582C3 (en) 1976-09-09 1976-09-09 Manufacture of an air cushion sheet from thermoplastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2640582A DE2640582C3 (en) 1976-09-09 1976-09-09 Manufacture of an air cushion sheet from thermoplastics

Publications (3)

Publication Number Publication Date
DE2640582A1 DE2640582A1 (en) 1978-03-23
DE2640582B2 DE2640582B2 (en) 1979-11-15
DE2640582C3 true DE2640582C3 (en) 1980-07-24

Family

ID=5987528

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2640582A Expired DE2640582C3 (en) 1976-09-09 1976-09-09 Manufacture of an air cushion sheet from thermoplastics

Country Status (1)

Country Link
DE (1) DE2640582C3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3769930B1 (en) * 2019-07-22 2022-02-09 BG Plast Impianti S.r.l. Method and plant for the production of three-layer panels in thermoplastic material

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2064501T3 (en) * 1989-03-03 1995-02-01 Rxs Schrumpftech Garnituren HOT CONTRACTION WRAP.
CA2023627A1 (en) * 1989-09-01 1991-03-02 Walter B. Mueller Shrinkable bubble laminate
IS1570B (en) * 1990-05-14 1995-02-28 Nihon Dimple Carton Co., Ltd. Heat insulating corrugated board and its method of manufacture
US7481958B2 (en) * 2002-08-29 2009-01-27 Kawakami Sangyo Co., Ltd. Process and apparatus for forming a plastic sheet having recessed and protruded parts and double wall sheet having the plastic sheet
DE102013101752A1 (en) * 2013-02-22 2014-09-11 Karlsruher Institut für Technologie Non-planar shaped body, process for its preparation, its use, process for the preparation of a microstructure and its use

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3769930B1 (en) * 2019-07-22 2022-02-09 BG Plast Impianti S.r.l. Method and plant for the production of three-layer panels in thermoplastic material

Also Published As

Publication number Publication date
DE2640582B2 (en) 1979-11-15
DE2640582A1 (en) 1978-03-23

Similar Documents

Publication Publication Date Title
EP0344765A1 (en) Method and arrangement for glueing flat parts
DE2640582C3 (en) Manufacture of an air cushion sheet from thermoplastics
DE2044696C2 (en) Device for the continuous production of a flat composite web
DE1561499B1 (en) Apparatus for making corrugated cardboard
DE2611361C3 (en) Method and device for the production of composite panels
DE1952983C3 (en) Process for producing hollow objects from two thermoplastic films
DE2234008B2 (en) Process for the production of laminates
DE3126948C2 (en) Process for the production of panels with a continuously corrugated middle layer and flat top layers
DE1753840C3 (en) Device for the continuous production of composite panels, in particular building panels
DE1504292B2 (en) INSULATING MATERIAL
EP0848855B1 (en) Method of treating resilient materials provided with silicic acid intercalations
EP0764521A2 (en) Method for producing a laminate made of a nonwoven web coated on one face with plastic film
DE2658201A1 (en) Coating a flat web or section with a laminate - using a printed two-ply laminate to provide protection and firm adhesion
DE3005272C2 (en) Method and device for conditioning corrugated cardboard
DE3334670A1 (en) Process for heating a film web of a thermoplastic having a distinct crystalline melting point
DE29518428U1 (en) Heat-insulating cover for thermotechnical devices
DE2714571C3 (en) Method and system for pressing pressed material mats in the production of chipboard, fiberboard and the like
DE2125438C3 (en) Winding capacitor
DE7721455U1 (en) AIR CUSHION FILM
DE6803360U (en) DEVICE FOR THE TREATMENT OF ORIENTED, HEAT-STABILIZED, THERMOPLASTIC PLASTIC FILMS
DE1561499C (en) Device for the production of corrugated cardboard
AT312261B (en) Method and device for producing an at least two-layer layer material from thermoplastic material
DE2509252C3 (en) Process for the production of laminated expanded polystyrene sheets and device for carrying out the process
DE2136815A1 (en) Molten plastic coating - of continuous sheet material
AT324686B (en) METHOD AND DEVICE FOR APPLYING CONNECTING LAYERS MADE OF PLASTIC TO A FILM MADE OF THERMOPLASTIC PLASTIC

Legal Events

Date Code Title Description
OAM Search report available
OAP Request for examination filed
OC Search report available
OD Request for examination
C3 Grant after two publication steps (3rd publication)
8339 Ceased/non-payment of the annual fee