DE3641755A1 - Process for treating polystyrene moulded articles - Google Patents
Process for treating polystyrene moulded articlesInfo
- Publication number
- DE3641755A1 DE3641755A1 DE19863641755 DE3641755A DE3641755A1 DE 3641755 A1 DE3641755 A1 DE 3641755A1 DE 19863641755 DE19863641755 DE 19863641755 DE 3641755 A DE3641755 A DE 3641755A DE 3641755 A1 DE3641755 A1 DE 3641755A1
- Authority
- DE
- Germany
- Prior art keywords
- heat treatment
- moulded articles
- production
- foamed
- plates
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 13
- 239000004793 Polystyrene Substances 0.000 title abstract description 9
- 229920002223 polystyrene Polymers 0.000 title abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000000465 moulding Methods 0.000 claims description 5
- 229920006248 expandable polystyrene Polymers 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 238000010924 continuous production Methods 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- -1 Polyethylene Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/16—Surface shaping of articles, e.g. embossing; Apparatus therefor by wave energy or particle radiation, e.g. infrared heating
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/56—After-treatment of articles, e.g. for altering the shape
-
- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Behandlung von Formkörpern, insbesondere Platten aus aufgeschäumtem Polystyrol.The invention relates to a method for the treatment of Shaped bodies, in particular sheets made of foamed Polystyrene.
Formkörper aus Polystyrol, insbesondere in Form von Platten werden im Bauwesen vielfach für Zwecke des Wärme- und Schallschutzes verwendet. Die Herstellung solcher Platten erfolgt entweder derart, daß in Blöcken aufgeschäumtes Material nachträglich zu Platten geschnitten wird oder daß die Platten in entsprechenden Formen unmittelbar aus vorgeschäumtem Material aufgeschäumt werden.Molded articles made of polystyrene, in particular in the form of plates are widely used in construction for the purposes of heating and Noise protection used. The manufacture of such plates takes place either in such a way that foamed in blocks Material is subsequently cut into plates or that the plates in appropriate forms immediately pre-foamed material.
Ein bevorzugtes Anwendungsgebiet von Platten aus Polystyrol sind Montageplatten für die Rohre von Warmwasser- Fußbodenheizungen, sogenannte Heizrohrträgerplatten. Dabei handelt es sich um Platten einer Dicke von 20 bis 100 mm, die auf ihrer Oberseite ein Raster von nach oben ragenden Vorsprüngen besitzen. Diese Vorsprünge sind in solchen Abständen voneinander angeordnet und besitzen solche Durchmesser, daß Heizrohre aus Kunststoff, z.B. aus Polyäthylen zwischen ihnen verlegt und durch sie in der Verlegeebene klemmend gehalten werden. Diese Platten, die oft an ihren Rändern mit Hakenfalzverbindungen zum dichten Anschluß aneinander versehen sind, bilden zugleich eine Wärme- und Trittschalldämmung. Nach dem Verlegen der Rohre wird ein Estrich aufgebracht, der die Heizrohre umgibt und die Unterkonstruktion für den Bodenbelag bildet.A preferred area of application for polystyrene sheets are mounting plates for the pipes of hot water Underfloor heating, so-called heating tube support plates. Here the plates are 20 to 100 mm thick, that have a grid of upwards on their top Have protrusions. These protrusions are in such Spaced from each other and have such Diameter that heating pipes made of plastic, e.g. out Polyethylene laid between them and through them in the Laying level are held clamped. These plates that often at their edges with hook fold connections for sealing Connected to each other, also form one Thermal and impact sound insulation. After laying the pipes a screed is applied that surrounds the heating pipes and forms the substructure for the floor covering.
Derartige Platten aus Polystyrol haben, auch wenn es sich um in der Form ausgeschäumte Platten mit weitgehend glatter, geschlossener Oberfläche handelt, den Nachteil, daß sie mehr oder weniger wasserdurchlässig sind. So nehmen sie aus dem darüber aufgebrachten frischen Estrich Wasser auf, das diesem dann beim Abbinden fehlt, was zu Festigkeitseinbußen führt.Such sheets made of polystyrene, even if it is to largely in the form of foamed panels smooth, closed surface, the disadvantage that they are more or less permeable to water. So take them from the fresh screed water applied above on that this is missing when tying, what to Loss of strength leads.
Um diese Platten zumindest an der Oberseite, mit der sie mit dem Estrich in Berührung kommen, gegen eindringende Feuchtigkeit zu schützen, ist es bekannt, auf die Platten beispielsweise im Tiefziehverfahren eine Folie aufzuziehen (DE-GM 84 29 708). Abgesehen davon, daß hierfür zusätzliche Arbeitsvorgänge erforderlich sind, die große und kostenaufwendige Vorrichtungen bedingen, besteht der Nachteil der Verletzungsgefahr der Folien, vor allem beim Begehen der Platten. Besonders leicht sind Verletzungen dort möglich, wo die Folie um die Kanten der Vorsprünge herumgeführt ist und - durch den Tiefziehvorgang bedingt - ausgedünnt wird. Gerade an derartigen Kanten ist beim Begehen der verlegten Platten zum Verlegen der Heizrohre eine Beschädigung am leichtesten möglich.To make these plates at least on the top with which they come into contact with the screed against penetrating To protect moisture, it is known on the panels for example, drawing a film using the deep-drawing process (DE-GM 84 29 708). Apart from the fact that this is additional Operations that are large and large are required require expensive devices, there is Disadvantage of the risk of injury to the foils, especially when Walk on the plates. Injuries are particularly easy possible where the film around the edges of the protrusions is led around and - due to the deep-drawing process - is thinned out. At such edges in particular Walk on the laid panels for laying the heating pipes damage is most easily possible.
Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Möglichkeit zu schaffen, um Formkörper aus Polystyrol, insbesondere in Form von Platten, z.B. Montageplatten der angegebenen Art auf möglichst einfache und wirtschaftliche Weise zuverlässig gegen eindringende Feuchtigkeit schützen zu können.The invention is therefore based on the object Possibility to create molded articles made of polystyrene, especially in the form of plates, e.g. Mounting plates of the specified in the simplest and most economical way possible Protect way reliably against the ingress of moisture to be able to.
Nach der Erfindung wird diese Aufgabe durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst.According to the invention, this object is achieved by the features of the characterizing part of claim 1 solved.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.Advantageous further developments result from the Subclaims.
Durch die kurzzeitige Wärmebehandlung der Formkörper wird ein Anschmelzen der Oberfläche erreicht, das nach dem Abkühlen zu einer krustenartigen, dichten geschlossenen Oberfläche führt, durch die Wasser nicht mehr einzudringen vermag. Wesentlich für die Erfindung ist, daß die Wärmebehandlung mit einer Temperatur erfolgt, die zum oberflächlichen Schmelzen des Polystyrolmaterials führt, daß sie aber nur über einen sehr kurzen Zeitraum erfolgen darf, um ein vollständiges Schmelzen des Formkörpers, das insbesondere bei Platten verhältnismäßig rasch erfolgt, verhindert wird.Due to the short-term heat treatment of the molded body a melting of the surface achieved after the Cool to a crusty, dense closed Surface leads through which water can no longer penetrate can It is essential for the invention that Heat treatment is carried out at a temperature that leads to superficial melting of the polystyrene material, that they only take place over a very short period of time is allowed to completely melt the molded body, the takes place relatively quickly, especially with disks, is prevented.
Von besonderem Vorteil ist dabei, wenn die Formkörper zur Wärmebehandlung noch eine von der Herstellung herrührende Restfeuchte haben. Polystyrolgranulat, das in Formen unter der Einwirkung von Sattdampf aufgeschäumt wird, hat nämlich unmittelbar nach der Herstellung noch eine vergleichsweise große Restfeuchte, die erst langsam während der Lagerung der Formkörper durch Dampfdiffusion nach außen abgebaut wird. Diese Restfeuchte verhindert bei der erfindungsgemäßen Wärmebehandlung ein zu schnelles Eindringen der von außen zugeführten Wärme in den Formkörper; sie erweitert die Grenzen der Temperatur und zeitlichen Dauer der Wärmebehandlung und erleichtert die Bildung der Kruste.It is particularly advantageous if the shaped body for Another heat treatment originating from the manufacture Have residual moisture. Polystyrene granules that come in molds below the effect of saturated steam is foamed, namely a comparative immediately after production large residual moisture that only slowly during storage the molded body is broken down by vapor diffusion to the outside becomes. This residual moisture prevents heat treatment according to the invention too fast Penetration of the heat supplied from outside into the Molded body; it extends the limits of temperature and duration of the heat treatment and facilitates the Formation of the crust.
Dabei hat sich weiterhin gezeigt, daß diese Wärmebehandlung zu einem rascheren Austrocknen der Formkörper führt, so daß die bislang erforderliche Lagerzeit ganz wesentlich verkürzt werden kann.It has also been shown that this heat treatment leads to a faster drying of the moldings, so that the storage time previously required is very important can be shortened.
Ein weiterer vorteilhafter Aspekt des erfindungsgemäßen Verfahrens besteht darin, daß die Wärmeeinwirkung gerade an vorstehenden Stellen der Formkörper, z.B. an den Kanten der Vorsprünge von Heizrohrträgerplatten am stärksten ist; daraus folgt, daß die durch die Wärmebehandlung ohnehin eintretende Oberflächenverfestigung gerade an diesen extremen Stellen besonders groß ist. Dadurch wird nicht nur die Gefahr der Beschädigung der Platten beim Begehen herabgesetzt, sondern es ist durch diese Oberflächenverfestigung auch möglich, für solche Platten leichteres Material zu verarbeiten, das oft billiger ist und eine bessere Wärmedämmung ermöglicht.Another advantageous aspect of the invention The procedure is that the heat is on protruding points of the shaped bodies, e.g. on the edges of the Protrusions of heating tube support plates are strongest; it follows that the heat treatment anyway occurring surface hardening just at these extreme places is particularly large. This will not only the risk of damage to the panels when walking on them degraded but it's through this Surface hardening also possible for such plates lighter material to process, which is often cheaper and enables better thermal insulation.
Während die Temperatur für die Wärmebehandlung im wesentlichen von dem Schmelzpunkt des betreffenden Polystyrolmaterials abhängt, ist die Zeitdauer der Behandlung von den Abmessungen der Formkörper abhängig. Bei Heizrohrträgerplatten der beschriebenen Art hat bei frischen, also unmittelbar zuvor ausgeschäumten Platten eine Temperatur von 165 Grad Celsius und eine Behandlungsdauer von 6 Sekunden zu guten Ergebnissen geführt. Zweckmäßig wird die erfindungsgemäße Wärmebehandlung deshalb dem Herstellungsvorgang der Platten unmittelbar nachgeschaltet.While the temperature for the heat treatment in the essentially from the melting point of the subject Polystyrene material depends on the length of time Treatment depends on the dimensions of the moldings. At Heizrohrträgerplatten of the type described has fresh, i.e. foamed plates immediately before a temperature of 165 degrees Celsius and a Treatment time of 6 seconds for good results guided. The invention is expedient Heat treatment therefore the manufacturing process of the panels immediately downstream.
Als Vorrichtung zur Durchführung des Verfahrens ist ein Wärmetunnel geeignet, in dem Wärme durch Warmluft und/oder Strahlung erzeugt wird und durch den die Platten mittels geeigneter Transportvorrichtungen hindurchgeführt werden. Um eine einwandfreie Behandlung der Platten über ihre gesamte Oberfläche zu erreichen, werden sie auf Nadeln aufgelegt, die aus Transportbändern aufragen. Der Kanal ist an den Enden in an sich bekannter Weise durch Wärmeschleusen abgeschlossen.As a device for performing the method is a Heat tunnel suitable, in which warmth through warm air and / or Radiation is generated and by means of which the plates suitable transport devices are passed. To ensure proper treatment of the plates on their to reach entire surface, they are on needles placed on the conveyor belts. The channel is at the ends in a manner known per se Heat locks completed.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863641755 DE3641755A1 (en) | 1986-12-06 | 1986-12-06 | Process for treating polystyrene moulded articles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863641755 DE3641755A1 (en) | 1986-12-06 | 1986-12-06 | Process for treating polystyrene moulded articles |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3641755A1 true DE3641755A1 (en) | 1988-06-16 |
DE3641755C2 DE3641755C2 (en) | 1991-10-10 |
Family
ID=6315630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19863641755 Granted DE3641755A1 (en) | 1986-12-06 | 1986-12-06 | Process for treating polystyrene moulded articles |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3641755A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3735680A1 (en) * | 1986-12-05 | 1988-07-14 | Projekt Wasserwirtschaft Veb | Floating granular carrier material prodn. - for bio:technological processes by heating foamed polystyrene flakes at below the carbonisation temp. |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE946085C (en) * | 1951-04-19 | 1956-07-26 | Basf Ag | Process for the production of porous moldings from thermoplastics with a closed pore-free surface |
DE1504263A1 (en) * | 1964-12-12 | 1969-09-25 | Bayer Ag | Process for densifying the surface of thermoplastic foams |
GB1175835A (en) * | 1966-04-16 | 1969-12-23 | Dunlop Co Ltd | Surface Treatment of Cellular Materials |
DE1943437A1 (en) * | 1969-08-27 | 1971-03-04 | Licentia Gmbh | Foamed polyethylene for tube sealing - elements used in the deep-freezing |
DE2236771B2 (en) * | 1971-08-13 | 1979-03-15 | Bucher-Guyer Ag Maschinenfabrik, Niederweningen, Zuerich (Schweiz) | Method and device for producing a molded part from foamed polystyrene |
-
1986
- 1986-12-06 DE DE19863641755 patent/DE3641755A1/en active Granted
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE946085C (en) * | 1951-04-19 | 1956-07-26 | Basf Ag | Process for the production of porous moldings from thermoplastics with a closed pore-free surface |
DE1504263A1 (en) * | 1964-12-12 | 1969-09-25 | Bayer Ag | Process for densifying the surface of thermoplastic foams |
GB1175835A (en) * | 1966-04-16 | 1969-12-23 | Dunlop Co Ltd | Surface Treatment of Cellular Materials |
DE1943437A1 (en) * | 1969-08-27 | 1971-03-04 | Licentia Gmbh | Foamed polyethylene for tube sealing - elements used in the deep-freezing |
DE2236771B2 (en) * | 1971-08-13 | 1979-03-15 | Bucher-Guyer Ag Maschinenfabrik, Niederweningen, Zuerich (Schweiz) | Method and device for producing a molded part from foamed polystyrene |
Non-Patent Citations (1)
Title |
---|
DE-Z: Hochmolekularbericht, 1982, H 14568/82 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3735680A1 (en) * | 1986-12-05 | 1988-07-14 | Projekt Wasserwirtschaft Veb | Floating granular carrier material prodn. - for bio:technological processes by heating foamed polystyrene flakes at below the carbonisation temp. |
Also Published As
Publication number | Publication date |
---|---|
DE3641755C2 (en) | 1991-10-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2835665C2 (en) | Method of manufacturing a lining from a composite laminated panel | |
DE2715266A1 (en) | METHOD FOR MANUFACTURING SOUND INSULATING ELEMENTS | |
CH686785A5 (en) | Odour Armer, sound and waermedaemmender Formkoerper and method for its manufacture. | |
DE2516945A1 (en) | MOLDABLE ORTHOPEDIC DEVICE | |
DE2633900A1 (en) | PROCESS AND SHELL FOR MANUFACTURING PRECAST CONCRETE ELEMENTS | |
DE3136521A1 (en) | INSULATION PANELS AND METHOD FOR THE PRODUCTION THEREOF | |
DD141031A5 (en) | METHOD FOR PRODUCING PARTS FROM WATER-HAZARDOUS MATERIAL | |
DE2818615C2 (en) | Process for the production of asbestos-cement laminate panels | |
DE2937399A1 (en) | EQUIPMENT FOR VEHICLES AND METHOD FOR THE PRODUCTION THEREOF | |
DE3641755A1 (en) | Process for treating polystyrene moulded articles | |
DE3643041C1 (en) | Bituminous roofing membrane and process for producing the same | |
CH462024A (en) | Method and device for the production of self-supporting heat and sound insulating moldings | |
EP2995870A1 (en) | Surface tempering system and its manufacturing method | |
DE2736992B2 (en) | Flat roof covering | |
DE3033819C2 (en) | Device for the production of wall elements | |
DE3504873C2 (en) | ||
DE19742223C2 (en) | Pipe insulation made of polyester fibers and admixture fibers | |
DE102004002560B4 (en) | moldings | |
DE1804471C3 (en) | Process for preventing the formation of longitudinal waves and longitudinal corrugations in the production of oriented, heat-stabilized, thermoplastic plastic films and apparatus for carrying out the process | |
DE1778516A1 (en) | Process for the production of molded articles from foam-shaped olefin polymers | |
DE1781555U (en) | COVERING PLATE, E.G. FOR INSULATING ROOFS, FLOORS, WALLS OR. DGL. | |
DE2431019A1 (en) | METHOD AND DEVICE FOR THERMAL AND ACOUSTIC INSULATION | |
DE2210475A1 (en) | Synthetic foam covering tiles - sheathed on all sides in thermoplastic film fitting tightly to foam | |
EP1002895B1 (en) | Ironing support, board and table | |
CH620487A5 (en) | Process and device for producing hollow building blocks |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: WEBER, WILLI, 6730 NEUSTADT, DE |
|
8381 | Inventor (new situation) |
Free format text: WEBER, WOLFGANG, 7500 KARLSRUHE, DE |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: ROLLTEC HEIZSYSTEME GMBH, 4430 STEINFURT, DE |
|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: ROLLTEC HEIZSYSTEME GMBH, 48282 EMSDETTEN, DE |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: ROLLTEC-HEIZSYSTEME VERTRIEBSGESELLSCHAFT MBH, 482 |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: ROLLTEC-HEIZSYSTEME PRODUKTIONS- UND VERTRIEBSGESE |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: SST-ROLLTEC GMBH & CO. KG, 48282 EMSDETTEN, DE |
|
8339 | Ceased/non-payment of the annual fee |