DE2925630C3 - Process for the production of a mat from cellulosic fibers which can be pressed into molded parts - Google Patents
Process for the production of a mat from cellulosic fibers which can be pressed into molded partsInfo
- Publication number
- DE2925630C3 DE2925630C3 DE19792925630 DE2925630A DE2925630C3 DE 2925630 C3 DE2925630 C3 DE 2925630C3 DE 19792925630 DE19792925630 DE 19792925630 DE 2925630 A DE2925630 A DE 2925630A DE 2925630 C3 DE2925630 C3 DE 2925630C3
- Authority
- DE
- Germany
- Prior art keywords
- mat
- starting material
- fiber
- production
- waste
- 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
Links
- 239000000835 fiber Substances 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 8
- 239000011230 binding agent Substances 0.000 claims description 17
- 239000007858 starting material Substances 0.000 claims description 13
- 229920001187 thermosetting polymer Polymers 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 8
- 239000000123 paper Substances 0.000 claims description 7
- 239000005011 phenolic resin Substances 0.000 claims description 7
- 229920001568 phenolic resin Polymers 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000009837 dry grinding Methods 0.000 claims description 3
- 239000004753 textile Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 2
- 241000273930 Brevoortia tyrannus Species 0.000 description 14
- 239000010893 paper waste Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
- D21B1/063—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods using grinding devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
- D21H23/06—Controlling the addition
- D21H23/14—Controlling the addition by selecting point of addition or time of contact between components
- D21H23/16—Addition before or during pulp beating or refining
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H5/00—Special paper or cardboard not otherwise provided for
- D21H5/26—Special paper or cardboard manufactured by dry method; Apparatus or processes for forming webs by dry method from mainly short-fibre or particle material, e.g. paper pulp
- D21H5/2607—Pretreatment and individualisation of the fibres, formation of the mixture fibres-gas and laying the fibres on a forming surface
- D21H5/2628—Formation of a product from several constituents, e.g. blends of various types of fibres, fillers and/or binders or formation from various sources and/or streams or fibres
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer zu Formteilen verpreßbaren, transportfähigen Matte aus zellulosehaltigen, mit Bindemitteln versetzten Fasern, bei dem als Faserausgangsmaterial ausschließlich zellulosehaltige Abfälle und überwiegend solche von Papier, Pappe und/oder Textilien verwendet werden, das Faserausgangsmaterial durch trockenes Mahlen zerfasert u Λ das Bindemittel, das thermoplastische und duroplastische Anteile erhält — soweit es nicht bereits an das Faserausgangsmaterial gebunden ist —, in Pulver- oder Faserform vor dem Mahlen zugegeben, die Mischung zu einem Vlies ausgestreut und dieses zu der Matte verdichtet wird.The invention relates to a process for the production of a transportable mat made of cellulosic fibers mixed with binders, compressible to form parts, in which only cellulosic waste and predominantly that of paper, cardboard and / or textiles are used as the fiber starting material, the fiber starting material is frayed by dry grinding and the like Λ the binder, which contains thermoplastic and thermoset components - if it is not already bound to the fiber starting material - is added in powder or fiber form before grinding, the mixture is spread to form a fleece and this is compacted into the mat.
Die Erfindung gemäß Hauptpatent geht von einem Stand der Technik aus, bei dem durch Zerfaserung im Defibrator von aus Rundholz gewonnenen Hackschnitzeln hergestellte Holzfasern mit thermoplastischen Naturharzderivaten beleimt, mit duroplastischen Bindemitteln, üblicherweise Phenolharzen, gemischt, die Mischung in einem sog. Felter zu einem Vlies gestreut und anschließend zu einer Matte verdichtet wird. Zur Lösung der Aufgabe einer einfachen und kostengünstigen Herstellung der Matte, die sich durch gute Homogenität und in einfacher Weise zu Formteilen hoher Qualität fertigpressen läßt, lehrt das Hauptpatent im wesentlichen, daß als Faserausgangsmaterial Abfallstoffe, überwiegend solche von Papier, Pappe und/oder Textilien verwendet und diese durch trockenes Mahlen zerfasert werden, wobei das Bindemittel in Pulver- oder Faserform vor dem Mahlen zugegeben wird. Dieses Verfahren gemäß Hauptpatent führt zu hervorragenden Ergebnissen. Es läßt sich danach in einfacher und kostengünstiger Weise, insbesondere ohne umfangreichen Wasserhaushalt, eine Matte herstellen, die sich durch hohe Flexibilität und Homogenität auszeichnet und in einem Preßgang zu Formteilen gepreßt werden kann, die sich gleichfalls durch gute Homogenität, hohe Festigkeit und geringe Dichte auszeichnen.The invention according to the main patent is based on a state of the art in which by defibering in Defibrator of wood chips made from round wood with thermoplastic fibers Glued to natural resin derivatives, mixed with thermosetting binders, usually phenolic resins Mixture is scattered in a so-called. Felter to form a fleece and then compacted into a mat. To the Solution to the problem of a simple and inexpensive production of the mat, which is characterized by good The main patent teaches homogeneity and can be pressed into molded parts of high quality in a simple manner essentially that the fiber starting material waste materials, predominantly those of paper, cardboard and / or Textiles are used and these are fiberized by dry grinding, the binder in powder or Fiber form is added before milling. This method according to the main patent leads to excellent Results. It can then be carried out in a simple and inexpensive manner, in particular without extensive Water balance, produce a mat that is characterized by high flexibility and homogeneity and can be pressed into molded parts in one press cycle, which are also characterized by good homogeneity, high Characterized by strength and low density.
In der dem Hauptpatent zugrunde liegenden Anmeldung ist bereits vorgeschlagen worden, Faserausgangsmaterial zu verwenden, in welchem die duroplastischen Bindemittel schon ganz oder teilweise enthalten sind. Der Erfindung ist die Aufgabe gestellt, hierfür und in weiterer Entwicklung der Lehre des Hauptpatents eineIn the application on which the main patent is based, it has already been proposed to use fiber starting material to use, in which the thermosetting binders are already wholly or partially contained. The invention is set the task of this and in further development of the teaching of the main patent a
besonders kostengünstige Lösung anzugeben.Specify a particularly cost-effective solution.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß als Faserausgangsmaterial bei der Herstellung von Industriefiltern anfallende Abfälle von Phenolharz getränktem Filterpapier verwendet werden.According to the invention, this object is achieved in that the fiber starting material used in the production of Phenolic resin impregnated filter paper can be used for industrial filters.
Dieses Verfahren hat den Vorteil, daß die Einarbeitung und Dosierung der duroplastischen Bindemittel vereinfacht wird, da die Phenolharze in den damit getränkten Papierabfällen außerordentlich gleichmäßig und innig verteilt sind, was zu einer erheblichen Festigkeitsverbesserung, insbesondere hinsichtlich Druck- und Biegefestigkeit bei den späteren Formteilen führt Aufgrund dieser Gesichtspunkte kann es sich empfehlen, den gesamten duroplastischen Anteil des Bindemittels in Form von mit Phenolharz behandelten P&pierabfällen zuzugeben, so daß nur noch der thermoplastische Anteil zudosiert werden muß. Im übrigen ergibt sich eine erhebliche Kostenersparnis, da das in reiner Form relativ teure Phenolharz mittels eines billigen Abfallstoffs, der bei der Filterpapier-Herstellung in großer Menge anfällt, zugesetzt wird.This method has the advantage that the incorporation and metering of the thermosetting binder is simplified because the phenolic resins in the paper waste soaked with them are extremely uniform and are intimately distributed, resulting in a considerable improvement in strength, especially with regard to Compressive and flexural strength in the later molded parts leads due to these aspects it can recommend the entire thermosetting portion of the binder in the form of treated with phenolic resin To add paper waste, so that only the thermoplastic portion must be added. In addition, there is a considerable cost saving because the phenolic resin, which is relatively expensive in its pure form, by means of a cheap waste material that is produced in the manufacture of filter paper is obtained in large quantities, is added.
Es fcigt die Beschreibung eines Ausführungsbeispiels der Erfindung anhand der Zeichnung, die eine Anlage zur Durchführung des Verfahrens darstellt.It completes the description of an exemplary embodiment of the invention with reference to the drawing, which shows a system for carrying out the method.
Die Ausgangsstoffe des Verfahrens werden in Bunkern la, lö bis 4 bereitgehalten. Der Bunker la enthält zellulosehaltiges Material in Form von Abfällen von Papier, Pappe usw., die nicht behandelt sind und folglich Bindemittel allenfalls in untergeordneter Menge enthalten. Der Bunker Xb enthält mit duroplastischem Bindemittel behandelte Abfallstoffe, nämlich Abfälle von mit noch aushärtbaren Phenolharzen getränkten Filterpapieren, wie sie bei der Herstellung von Industriefiltern anfallen. Ferner enthalten die Bunker 2The starting materials for the process are kept ready in bunkers la, lo to 4. The bunker la contains cellulosic material in the form of waste paper, cardboard, etc., which have not been treated and consequently contain binders, at most, in a subordinate amount. The bunker Xb contains waste materials treated with a thermosetting binder, namely waste from filter papers soaked with phenolic resins that can still be hardened, such as are produced in the manufacture of industrial filters. The bunkers also contain 2
J5 ein thermoplastisches Bindemittel, z. B. in Form eines trockenen Pulvers von faserartiger Teilchenbeschaffenheit aus Polyäthylen, der Bunker 3 weitere duroplastische Bindemittel, die ggfs. zusätzlich zum Bindemittelanteil der Filterpapier-Abfälle des Bunkers Xb zugegeben werden können, und der Bunker 4 Zusatzstoffe, beispielsweise ein organisches Flammschutzmittel. Das Material aus dem Bunker la wird einer Schneidmühle 5a, die Filterpapierabfälle werden aus dem Bunker Xb einer Schneidmühle 5b zugeführt, wo sie jeweilsJ5 a thermoplastic binder, e.g. B. in the form of a dry powder of fiber-like particle properties made of polyethylene, the bunker 3 more thermosetting binders, which may be added to the binder content of the filter paper waste of the bunker Xb , and the bunker 4 additives, such as an organic flame retardant. The material from the bunker la is fed to a cutting mill 5a, the filter paper waste is fed from the bunker Xb to a cutting mill 5b , where they are each
ή entsprechend in Partikel mit Abmessungen von ca. 5x5 mm zerkleinert werden. An sich könnten die Ausgangsstoffe aus den Bunkern la und Xb auch gemeinsam zerkleinert werden, jedoch lassen die getrennt vorzerkleinerten Komponenten sich genauer dosieren. Aus den Schneidmühlen 5a, 5b gelangen die vorzerkleinerten Ausgangsmaterialien in eine Wirbelstrecke 6, in der sie mit den aus den Bunkern 2, 3, 4 zugeführten Bindemitteln und Zusatzstoffen gemischt werden. Die Förderung aller dieser Komponentenή be comminuted accordingly into particles with dimensions of approx. 5x5 mm. As such, the starting materials from the bunkers la and Xb could also be comminuted together, but the separately pre-comminuted components can be dosed more precisely. The pre-comminuted starting materials pass from the cutting mills 5a, 5b into a vortex section 6, in which they are mixed with the binders and additives supplied from the bunkers 2, 3, 4. Promoting all of these components
erfolgt pneumatisch. Zur Überwachung des Mischungsverhältnisses sind den Bunkern (nicht dargestellte) Dosierwaagen nachgeschaltet. Auf die Wirbelstrecke 6 folgt eine Reibbackenmühle 7, in der die Abfallstoffe trocken gemahlen, dabei zerfasert und zugleich mit dentakes place pneumatically. To monitor the mixing ratio, the bunkers (not shown) Downstream dosing scales. The vortex section 6 is followed by a friction jaw mill 7 in which the waste materials dry ground, frayed and at the same time with the
M) Bindemitteln und Zusatzstoffen gleichmäßig und intensiv gemischt werden, Das Mahlgut gelangt aus der Reibbackenmühle in einen mit Luft arbeitenden Sichter 8, aus dem die grobe Fraktion zum Eingang der Reibbackenmühle 7 zurückgeführt wird. An den Sichter 8 schließt sich ein Mischungsbunker 9 an, in dem die Mischung für die weiteren Arbeitsgänge bereitgehalten wird.M) binders and additives evenly and intensively be mixed, the grist comes out of the Friction mill into an air classifier 8, from which the coarse fraction to the entrance of the Friction mill 7 is returned. The separator 8 is followed by a mixing bunker 9 in which the Mixture is kept ready for further operations.
Die Mischung wird aus dem Mischungsbunker 9The mixture is discharged from the mixing bunker 9
abgezogen und mittels eines Formkopfes 10 mit einem Sieb 11 und einer Bürste 12 auf einen darunter angeordneten Vliesträger 13 aus einem endlosen, umlaufenden Sieb zu einem Vlies 17 gestreut. Das Vlies 17, das durch den Vliesträger 13 in Richtung des Pfeils 15 gefördert wird, wird zunächst in einer Unterdruckkammer 14 verdichtet und verfilzt und anschließend durch eine umlaufende Fräse 16 auf die vorgesehene Dicke abgetragen. Anschließend durchläuft das Vlies 17 eine Heizeinrichtung iti, in der das Vlies 17 von erwärmter Luft durchströmt wird. Dabei wird das Vlies 17 im kontinuierlichen Durchlauf gleichmäßig über seine ganze Dicke auf die Plastifizierungstemperatur des thermoplastischen Kunststoffs erwärmt und dabei ggfs. zugleich auf die vorgesehene Restfeuchte eingestellt. Unmittelbar auf die Heizeinrichtung 18 folgt eine Preßvorrichtung 22, in der das Vlies 17 mittels einer Druckwalze 23 im gleichfalls kontinuierlichen Durchlauf zu einer Matte vorgegebener Dichte verdichtet wird.peeled off and by means of a forming head 10 with a sieve 11 and a brush 12 sprinkled onto a fleece carrier 13 arranged underneath from an endless, revolving sieve to form a fleece 17. The fleece 17, which is conveyed by the fleece carrier 13 in the direction of the arrow 15, is first compressed and felted in a vacuum chamber 14 and then removed to the intended thickness by a rotating milling cutter 16. The fleece 17 then passes through a heating device iti, in which the fleece 17 is flowed through by heated air. The fleece 17 is heated continuously over its entire thickness to the plasticizing temperature of the thermoplastic material and, if necessary, adjusted to the intended residual moisture at the same time. Immediately after the heating device 18 is a pressing device 22, in which the fleece 17 is compacted by means of a pressure roller 23 in a likewise continuous passage to form a mat of predetermined density.
Die Druckwalze 23 kann hinsichtlich des Preßdrucks bzw. ihres Abstandes vom unteren Pressentisch 24 einstellbar sein. An die Preßvorrichtung 22 schließt eine Kühleinrichtung 25 an, in der die Matte wiederum von Luft durchströmt und auf Raumtemperatur gekühltThe pressure roller 23 can with regard to the pressing pressure or its distance from the lower press table 24 be adjustable. To the pressing device 22 includes a cooling device 25, in which the mat in turn of Air flows through and cooled to room temperature
in wird. Anschließend wird die Matte in einer Trennvorrichtung 26 auf vorbestimmte Länge abgelängtin will. The mat is then placed in a separator 26 cut to a predetermined length
Als Ergebnis des vorstehend beschriebenen Verfahrens ergibt sich eine Matte, in der die duroplastischen Bindemittel in noch aktivierbarer Form vorliegen und beim Verpressen zu Formteilen ausgehärtet werden.As a result of the method described above, there is a mat in which the thermosetting Binders are present in a form that can still be activated and are cured during compression to form molded parts.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792925630 DE2925630C3 (en) | 1979-06-26 | 1979-06-26 | Process for the production of a mat from cellulosic fibers which can be pressed into molded parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792925630 DE2925630C3 (en) | 1979-06-26 | 1979-06-26 | Process for the production of a mat from cellulosic fibers which can be pressed into molded parts |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2925630A1 DE2925630A1 (en) | 1981-01-15 |
| DE2925630B2 DE2925630B2 (en) | 1981-10-01 |
| DE2925630C3 true DE2925630C3 (en) | 1982-05-13 |
Family
ID=6074122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19792925630 Expired DE2925630C3 (en) | 1979-06-26 | 1979-06-26 | Process for the production of a mat from cellulosic fibers which can be pressed into molded parts |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2925630C3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3412660A1 (en) * | 1984-04-02 | 1985-10-10 | Günter H. 1000 Berlin Kiss | METHOD FOR THE PRODUCTION OF MOLDED PARTS FROM FIBROUS MATERIAL AND FIBER MAT FOR THE PRODUCTION OF MOLDED PARTS |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4810445A (en) * | 1986-09-26 | 1989-03-07 | Fortifiber Corporation | Process for making pressboard from poly-coated paper |
| DE3641464A1 (en) * | 1986-12-04 | 1988-06-16 | Uwe Welteke | HEAT-INSULATING PANEL CONTAINING NATURAL FIBERS AND METHOD AND DEVICE FOR THEIR PRODUCTION |
| DE3641466C2 (en) * | 1986-12-04 | 1994-06-01 | Uwe Welteke | Device for the production of fiberboard |
| CA2014089C (en) * | 1989-07-21 | 1997-01-14 | Vernon L. Lamb | Apparatus and method for making pressboard from poly-coated paper using relative movement of facing webs |
| DE10066343B4 (en) * | 2000-06-02 | 2013-01-03 | Steico Se | Process for producing a flexible wood-fiber insulating mat and insulating mat produced by this process |
| CN110241660B (en) * | 2019-05-17 | 2021-10-29 | 五河县宜然知识产权服务有限公司 | Processing method for recycling waste packaging paper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2845112C3 (en) * | 1978-10-17 | 1981-11-05 | Casimir Kast Gmbh & Co Kg, 7562 Gernsbach | Process and plant for the production of mats from cellulosic fibers and process for the production of molded parts from these |
-
1979
- 1979-06-26 DE DE19792925630 patent/DE2925630C3/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3412660A1 (en) * | 1984-04-02 | 1985-10-10 | Günter H. 1000 Berlin Kiss | METHOD FOR THE PRODUCTION OF MOLDED PARTS FROM FIBROUS MATERIAL AND FIBER MAT FOR THE PRODUCTION OF MOLDED PARTS |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2925630B2 (en) | 1981-10-01 |
| DE2925630A1 (en) | 1981-01-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAP | Request for examination filed | ||
| OD | Request for examination | ||
| AF | Is addition to no. |
Ref country code: DE Ref document number: 2845112 Format of ref document f/p: P |
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| C3 | Grant after two publication steps (3rd publication) | ||
| 8327 | Change in the person/name/address of the patent owner |
Owner name: SEEBER SYSTEMTECHNIK KG, GERNSBACH, 76593 GERNSBAC |
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| 8327 | Change in the person/name/address of the patent owner |
Owner name: SEEBER KG, 67547 WORMS, DE |
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| 8340 | Patent of addition ceased/non-payment of fee of main patent |