Patents Assigned to AB LUDVIG SVENSSON
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Patent number: 11723319Abstract: A greenhouse screen strips of film material that are interconnected by a yarn system of transverse threads and longitudinal threads by means of knitting, warp-knitting or weaving process to form a continuous product, wherein at least some of the strips comprise a film material in the form of a single- or multilayer polyester film is disclosed. The film material has a transparency of at least 93.5% and is provided with at least a first anti-reflective coating or layer on a first side of the film material.Type: GrantFiled: May 30, 2017Date of Patent: August 15, 2023Assignee: AB LUDVIG SVENSSONInventors: Per Holgerson, Daniel Asplund
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Patent number: 11596112Abstract: A greenhouse screen comprising strips of film material that are interconnected by a yarn system of transverse threads and longitudinal threads by means of knitting, warp-knitting or weaving process to form a continuous product. The film material comprises a highly transparent, biaxially oriented, UV and flame-stable polyester film which is provided on at least one side with a coating which reduces the reflection of visible light. The greenhouse screen is particularly suited for the cultivation of plants with high light requirements.Type: GrantFiled: January 16, 2020Date of Patent: March 7, 2023Assignee: AB Ludvig SvenssonInventors: Sara Widén, Daniel Asplund
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Patent number: 11395463Abstract: A greenhouse screen comprising strips of film material that are interconnected by a yarn system of transverse threads and longitudinal threads by means of knitting, warp-knitting or weaving process to form a continuous product is disclosed. At least some of the strips comprise a film material in the form of a single- or multilayer polyester film wherein the film contains at least 1.0 wt.-% SiO2 and a maximum of 2.5 wt.-% SiO2, and has a spreading factor of at least 2 and not more than 8. The greenhouse screen as disclosed herein has a reduced flammability and light scattering properties particularly suited for greenhouse applications.Type: GrantFiled: January 20, 2017Date of Patent: July 26, 2022Assignee: AB Ludvig SvenssonInventors: Per Holgerson, Daniel Asplund
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Patent number: 9167754Abstract: The invention refers to a greenhouse screen comprising strips of film material that are interconnected by a yarn framework of transverse threads and longitudinal threads to form a continuous product, wherein the yarn framework is thermally bonded to at least one side of the strips of film material, wherein also those parts of the yarn framework that is thermally bonded to the strips have liquid-transporting capacity by capillary action. The amount of yarn in the yarn framework interconnecting and holding the strips can herewith be reduced.Type: GrantFiled: September 18, 2012Date of Patent: October 27, 2015Assignee: AB Ludvig SvenssonInventors: Hans Andersson, Per Holgerson
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Patent number: 9003698Abstract: The invention refers to a greenhouse screen comprising strips of film material that are interconnected by a yarn system by means of hosiery, knitting, warp-knitting or weaving process to form a continuous product. At least some of the strips comprise a film material in the form of a multilayer polyester film having a thickness less than 60 ?m and comprising at least two layers, wherein at least one layer is white and at least one layer is black, the at least one white layer comprises polyester and a white pigment in an amount between 5 and 50 weight-% based on the total weight of the white layer, and the at least one black layer comprises polyester and a black opacifying agent.Type: GrantFiled: February 4, 2011Date of Patent: April 14, 2015Assignee: AB Ludvig SvenssonInventors: Hans Andersson, Per Holgerson
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Publication number: 20130008082Abstract: The invention refers to a greenhouse screen comprising strips of film material that are interconnected by a yarn system by means of hosiery, knitting, warp-knitting or weaving process to form a continuous product. At least some of the strips comprise a film material in the form of a multilayer polyester film having a thickness less than 60 ?m and comprising at least two layers, wherein at least one layer is white and at least one layer is black, said at least one white layer comprises polyester and a white pigment in an amount between 5 and 50 weight-% based on the total weight of said white layer, and said at least one black layer comprises polyester and a black opacifying agent.Type: ApplicationFiled: February 4, 2011Publication date: January 10, 2013Applicant: AB LUDVIG SVENSSONInventors: Hans Andersson, Per Holgerson