NORWEGIAN PATENT OFFICE - PATENT NO.133412 - Water permeable, artificial turf for sports arenas

Sep 21, 2026

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NORWEGIAN PATENT OFFICE PATENT NO.133412 discloses a water permeable artificial turf for sports arenas. The turf includes a textile support layer fixed to an underlayer with openings, a nap that forms a grass mat, and a bottom with layered projections. Compared with prior artificial turfs that rely mainly on backcoated projections and limited openings, the invention improves both water permeability and anchoring of the nap under high stress, enabling water on the surface to pass quickly through the covering.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages42

Reading Time1 h 46 min

AccessFree to download

Description

Water permeable artificial turf for sports arenas

Problem with prior art

Technical task and solution

Preferred textile support layer configurations

CcFriedrich,Hans-Joachim. Water permeable,artificial turf,especiallyfor sports arenas.ll p. Patent(Norwegian)No.133412(1976).Filed:TRANSLATION NO.4637. wegian Patent No.133412 ewcastle-on-Tyne,England | anslated from Norwegian by | the Ralph McE1roy | Co., | Custom | Division | | --- | --- | --- | --- | --- | | O. Box 4828,Austin,Texa | s 78765 USA | | | | # NORWEGIAN PATENT OFFICEPATENT NO.133412 Int.c1.2: Application No.: Filed: Open to Public Inspection: Published: Priority: Applicant: Inventor: Representative: Code:360-4856 D 04 H 11/00D 04 B 21/02B 32 B 5/02E 01 C 13/00 3813/71 October 15,1971 April 18,1972 January 19,1976 October 17,1970 Federal Republic of GermanyNo.P 2051103 ADOLFF AKTIENGESELLSCHAFT,J.F.Eugen-Adolff-Strasse D-715 Backnang,Baden-Wurtt,West Germany Hans-Joachim FriedrichBacknang,West Germany Tandbergs Patent Office A.S.Oslo Cited Publications: WATER PERMEABLE,ARTIFICIAL TURE,ESPECIALLY FOR SPORTS ARENAS The present invention concerns a water permeable,artificialturf,especially for sports arenas,with a textile support layerfixed to an underlayer that has openings,a nap that forms agrass mat and a bottom with layered projections. A textile floor covering is known from US Patent 2,434,709which corresponds to the characteristics of the above citedartificial turf.In the known artificial turfs only the projections are provided with a so-called backcoating(Figure 1in US Patent 2,434,709).The projections located on the bottomoE the textile support layer are formed merely by the textilesuoport layer itself without cooperation of the nap.The nap inthe support layer is therefore held in the backcoating.Theopenings in the textile support layer are also fairly small sothat the water permeability is limited.However,it is preciselyin a sports arena that uses artificial turf that the nap formingthe grass mat is subject to high stresses so that high Page 2 British Patent No.1074741D 03 d; West German Patent No.472577,77a-19/02;No.914244,8h-8;West German OffenlegungsschriftNo.1534273,19c-5/00;No.1534384,19c-13/00;US Patents No.2070335,2312200,2434709,161-66, 3227574117-45,3332828161-21;Austrian Patent No.302232,8b-62/04 Digitized by the Internet Archivein 2016 https://archive.org/details/waterpermeablearOOfrie Page 3 requirements are placed on its anchoring in the support layer.In addition,water present on the top of the covering must beable to pass quickly through the covering.The known artificialturfs therefore do not meet the requirements imposed on artificial turfs,especially in sports arenas with respect tostrength and water permeability. The task that forms the basis of the present invention is toimprove artifical turf with respect to water permeability andanchoring of the nap in the textile support layer. This task issolved according to the invention in that the openings in termsof size offer good water permeability and the projections areformed during bonding of the nap and layering of the projectionsis created as a reinforcement of the bond between the nap and thetextile support layer. With such an artifical turf excellentpermeability is achieved with simultaneous anchoring of the nap. In a preferred version of the artificial turf according tothe invention the textile support layer has two fiber systemsthat bond the nap and to produce the openings one fiber system isof much thinner threads than the other fiber system and nap. Inthis manner the nap can be fixed by relatively simple bonding inthe textile support material even if the latter has relativelylarge openings. This principle can also be used on essentiallyall types of textile support layers,for example,also on a wovenfabric.When thceads oE difEerent thickness are used,it is easyto form an embossed projection on the bottom of the textile support layer at the sites where the nap is bonded,since this isalso formed of a relatively thick thread.This i

FAQs

What is the core invention disclosed in Patent No.133412?

A water permeable artificial turf for sports arenas using a textile support layer with openings, a nap forming a grass mat, and a bottom with layered projections that reinforce bonding and anchoring.

What problem with earlier artificial turfs does the patent address?

Earlier turfs provide limited water permeability because the openings in the textile support layer are small, and they do not adequately meet anchoring requirements for the nap under sports use.

How does the invention improve nap anchoring and water permeability?

The openings are sized to allow good water permeability, while the projections are formed during bonding so the bond between the nap and the textile support layer is reinforced, achieving both permeability and anchoring.

Sep 21, 2026

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