US20070036976A1 - Cutting filament with improved composition for edge trimmers, scrub cutters, and the like - Google Patents

Cutting filament with improved composition for edge trimmers, scrub cutters, and the like Download PDF

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Publication number
US20070036976A1
US20070036976A1 US11/337,308 US33730806A US2007036976A1 US 20070036976 A1 US20070036976 A1 US 20070036976A1 US 33730806 A US33730806 A US 33730806A US 2007036976 A1 US2007036976 A1 US 2007036976A1
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US
United States
Prior art keywords
filament
cutting
cutting filament
caprolactam
softening agent
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.)
Abandoned
Application number
US11/337,308
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English (en)
Inventor
Emmanuel Legrand
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.)
Speed France SAS
Original Assignee
Speed France SAS
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 Speed France SAS filed Critical Speed France SAS
Assigned to SPEED FRANCE reassignment SPEED FRANCE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEGRAND, EMMANUEL
Publication of US20070036976A1 publication Critical patent/US20070036976A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters
    • A01D34/4168—Constructional details of the flexible lines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core

Definitions

  • the present invention generally relates to devices for cutting vegetation such as scrub cutters, edge trimmers and the like, and is more particularly directed to new cutting filaments for such devices.
  • a cutting filament is generally made by extruding/drawing polyamide, and significant developments of these filaments have been known for a few years: suitable shapes for reducing noise, improving cutting efficiency, etc., strands in several materials in order to improve cutting efficiency, improve biodegradability, to reduce manufacturing costs, etc.
  • Cutting filaments made from two or more components generally by a co-extrusion method from two sources of different materials are thus known.
  • filaments including a main body or polyamide core and a secondary portion, such as a skin totally or partially surrounding the core, in a material different from that of the core, are known.
  • “Different material” means here a material with at least one physical or chemical property different from that of the material of the core; this may in particular be a polyamide or co-polyamide, different from that of the core, or other natural or synthetic materials or mixtures thereof.
  • a satisfactory cutting filament results from a compromise between certain flexibility, in particular allowing the filament not to be broken when it encounters obstacles during work, and certain hardness which in particular allows it to attack the plants with the required energy and not to wear out prematurely.
  • the present invention is directed to proposing a cutting filament with improved properties regarding this compromise.
  • a cutting filament for a plant cutting device such as a scrub cutter or edge trimmer, wherein at least one portion of the filament is made on the basis of polyamide 6-6 enriched with a softening agent.
  • Certain preferred but non-limiting aspects of the filament are the following:
  • FIGS. 1-3 are three sectional perspective views of cutting filaments according to the first, second and third embodiments of the invention, respectively.
  • a cutting filament has been illustrated for a motorized plant-cutting device, such as an edge cutter, a scrub cutter, etc., which comprises a core 10 and a skin 20 .
  • the skin totally surrounds the core.
  • the core has a cross-section with a simple or complex shape. In the case in point, the core has a general rhombic section with beveled edges.
  • the skin 20 may have any desired cross-section.
  • the skin has a contour with an upper convexity and a lower convexity and defines two serrated areas Da and Db for attacking the plants, which protrude sideways on either side of the core 10 .
  • the core is made in polyamide 6-6 added with a certain amount of softening agent.
  • a particularly suitable softening agent is co-monomeric ⁇ -caprolactam (simply designated by caprolactam hereafter), which will be noticed here as being the raw material which polymerizes into polyamide 6.
  • a proportion of caprolactam between about 6 and 15%, preferably between 11 and 14% is used to attain a suitable softening effect for use as a cutting filament.
  • the skin 20 is also made in polyamide 6-6 here, with this time a much smaller or even zero amount of softening agent (again typically caprolactam here). A proportion from 2 to 3% of caprolactam is typically provided.
  • a cutting filament with improved properties is thereby obtained, in the sense that one benefits from the intrinsic strength of polyamide 6-6 without it having the brittle aspect.
  • the filament has satisfactory flexibility while being mechanically stronger than a filament based on polyamide 6.
  • FIG. 2 illustrates another embodiment of the invention, with a central core 10 and two wings 20 a , 20 b independent of each other, further forming here serrated cutting areas Da and Db.
  • the core 10 has a circular cross-section and both cutting areas are isolated from each other here.
  • Polyamide 6-6 enriched with a softening agent such as caprolactam, is further used here, and an unsoftened or substantially less softened polyamide 6-6 is used for both cutting areas.
  • FIG. 3 illustrates another embodiment of a cutting filament according to the invention, consisting of a single material.
  • the cross-section of the filament is a symmetrical rhombus here, it is made with the same material as that for the core of the filaments of FIGS. 1 and 2 , i.e., softened polyamide 6-6 for example with between 11 and 14% of caprolactam.
  • the filaments according to the invention are made by a conventional extrusion/drawing method (co-extrusion in the case of filaments comprising two or more materials).
  • the softened agent is then carefully mixed with the molten polyamide 6-6 upstream from the drawing process.
  • the filament includes serrations or other reliefs or recesses intended to improve some of its properties (cutting efficiency, operating noise level, etc.), these are made either during the extrusion/drawing process or downstream from this process, for example by means of knives, etc., by removing material.
  • a filament according to the invention may include, in addition to a main body in softener-enriched polyamide 6-6 providing the filament with the desired flexibility, any other portion in a material which may either belong or not to the polyamide family, which may either contain or not filler products such as mineral fibers, etc.
  • the invention may be combined by one skilled in the art with many other enhancements generally known in the field of cutting filaments (filaments with a particular shape and/or polymaterials for improving the cutting efficiency, reducing the operating noise, enhancing biodegradability, preventing sticking phenomena, etc.).

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
US11/337,308 2005-01-24 2006-01-23 Cutting filament with improved composition for edge trimmers, scrub cutters, and the like Abandoned US20070036976A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0500702 2005-01-24
FR0500702A FR2881022B1 (fr) 2005-01-24 2005-01-24 Filament de coupe de composition amelioree pour coupe-bordures, debroussailleuses, etc.

Publications (1)

Publication Number Publication Date
US20070036976A1 true US20070036976A1 (en) 2007-02-15

Family

ID=34954177

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/337,308 Abandoned US20070036976A1 (en) 2005-01-24 2006-01-23 Cutting filament with improved composition for edge trimmers, scrub cutters, and the like

Country Status (4)

Country Link
US (1) US20070036976A1 (de)
EP (1) EP1683406B1 (de)
DE (1) DE602006001522D1 (de)
FR (1) FR2881022B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10100182B2 (en) 2008-04-11 2018-10-16 Speed France Sas Cutting filament with improved composition for edge trimmers, scrub cutters and the like
ITTO20110927A1 (it) * 2011-10-17 2013-04-18 Colplast S R L Filo per tagliaerba comprendente un materiale polimerico biodegradabile e relativo materiale polimerico biodegradabile
ES2774681T3 (es) * 2017-07-28 2020-07-22 Speed France S A S Filamento de corte para una máquina de corte de vegetación

Citations (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066366A (en) * 1960-12-08 1962-12-04 American Viscose Corp Binding device
US3720055A (en) * 1970-03-20 1973-03-13 Sobico Inc Synthetic material textile filaments
US4126990A (en) * 1976-08-18 1978-11-28 Roper Corporation Cutter disc assembly for rotary lawn mower
US4185381A (en) * 1978-07-17 1980-01-29 Palmieri John P Rotary nylon line vegetation cutter
US4186239A (en) * 1976-12-06 1980-01-29 Berkley & Company, Inc. Monofilament weed cutters
US4367587A (en) * 1978-11-07 1983-01-11 Kilmer Lauren G Filament vegetation trimmer
US5220774A (en) * 1990-02-24 1993-06-22 Andreas Stihl Cutting filament for a vegetation cutter
USD358535S (en) * 1992-09-30 1995-05-23 Shakespeare Company Cutting line for a rotating line trimmer
US5463815A (en) * 1994-09-12 1995-11-07 Robert L. Phillips Ribbed flexible cutting line
US5524350A (en) * 1994-07-15 1996-06-11 Glassmaster Company Cutting line filled with inorganic grit material
USD376078S (en) * 1995-08-18 1996-12-03 Shakespeare Company Cutting line for a rotating line trimmer
USD376739S (en) * 1995-09-12 1996-12-24 Shakespeare Company Cutting line for a rotating line trimmer
US5687482A (en) * 1994-08-11 1997-11-18 Dolmar Gmbh Rotating trimming line for brush cutters
US5709942A (en) * 1991-05-20 1998-01-20 Alliedsignal Inc. Product and process improvement of coated polymeric monofilament
US5761816A (en) * 1996-05-31 1998-06-09 Morabit; Vincent D. Aerodynamic cutting string
US5987756A (en) * 1997-07-23 1999-11-23 Mcculloch Corporation Head and head assembly for a string trimmer
US5996233A (en) * 1996-05-31 1999-12-07 Morabit; Vincent D. String and string trimmer operation
US6045911A (en) * 1996-04-03 2000-04-04 Husqvarna Ab Cutting filament
US6061914A (en) * 1997-07-23 2000-05-16 Speed France Cutting line with improved degradability for brush cutters and edge trimmers
US6094823A (en) * 1997-07-23 2000-08-01 Jenn Feng Industrial Company, Ltd. Method and apparatus for anchoring flails on a string trimmer
US6119350A (en) * 1997-05-23 2000-09-19 Trim-A-Lawn Corporation Rotary cutting member for lawn trimmers
US6124034A (en) * 1997-09-23 2000-09-26 Proulx Manufacturing, Inc. Process for forming double-strand edged monofilament line for use in line trimmers
US6171697B1 (en) * 1999-02-03 2001-01-09 Speed France Cutting line or fishing line made of synthetic material
US6560878B2 (en) * 2000-04-12 2003-05-13 Shakespeare Company, Llc Multi-component, extruded vegetation cutting line
US6630226B1 (en) * 1997-03-14 2003-10-07 Speed France Composite cutting line for brush cutters and edge trimmers
US20050028390A1 (en) * 2001-09-03 2005-02-10 Emmanuel Legrand Cutting wire for brush cutters and edge trimmers
US6874235B1 (en) * 1999-05-20 2005-04-05 Speed France Noise reducing cutting wire for bush cutter and hedge-trimmer
US20050081389A1 (en) * 2002-06-07 2005-04-21 Emmanuel Legrand Cutting unit and cutting filament for a plant cutting device
US6910277B2 (en) * 2001-08-29 2005-06-28 Proulx Manufacturing, Inc. Noise attenuating flexible cutting line for use in rotary vegetation trimmers and method of manufacture
US7000324B2 (en) * 2000-12-15 2006-02-21 Robert L. Phillips Top loading fixed line trimmer head
US20070123092A1 (en) * 2003-05-14 2007-05-31 Emmanuel Legrand Novel cutting wire for devices such as edge trimmers or brush cutters
US7257898B2 (en) * 2004-04-16 2007-08-21 Kwik Products, Inc. Cutting head for string trimmer

Patent Citations (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066366A (en) * 1960-12-08 1962-12-04 American Viscose Corp Binding device
US3720055A (en) * 1970-03-20 1973-03-13 Sobico Inc Synthetic material textile filaments
US4126990A (en) * 1976-08-18 1978-11-28 Roper Corporation Cutter disc assembly for rotary lawn mower
US4186239A (en) * 1976-12-06 1980-01-29 Berkley & Company, Inc. Monofilament weed cutters
US4185381A (en) * 1978-07-17 1980-01-29 Palmieri John P Rotary nylon line vegetation cutter
US4367587A (en) * 1978-11-07 1983-01-11 Kilmer Lauren G Filament vegetation trimmer
US5220774A (en) * 1990-02-24 1993-06-22 Andreas Stihl Cutting filament for a vegetation cutter
US5709942A (en) * 1991-05-20 1998-01-20 Alliedsignal Inc. Product and process improvement of coated polymeric monofilament
USD358535S (en) * 1992-09-30 1995-05-23 Shakespeare Company Cutting line for a rotating line trimmer
US5524350A (en) * 1994-07-15 1996-06-11 Glassmaster Company Cutting line filled with inorganic grit material
US5687482A (en) * 1994-08-11 1997-11-18 Dolmar Gmbh Rotating trimming line for brush cutters
US5463815A (en) * 1994-09-12 1995-11-07 Robert L. Phillips Ribbed flexible cutting line
USRE36940E (en) * 1994-09-12 2000-11-07 Robert L. Phillips Ribbed flexible cutting line
USD376078S (en) * 1995-08-18 1996-12-03 Shakespeare Company Cutting line for a rotating line trimmer
USD376739S (en) * 1995-09-12 1996-12-24 Shakespeare Company Cutting line for a rotating line trimmer
US6045911A (en) * 1996-04-03 2000-04-04 Husqvarna Ab Cutting filament
US5996233A (en) * 1996-05-31 1999-12-07 Morabit; Vincent D. String and string trimmer operation
US5761816A (en) * 1996-05-31 1998-06-09 Morabit; Vincent D. Aerodynamic cutting string
US6161292A (en) * 1996-05-31 2000-12-19 Morabit; Vincent D. String and string trimmer operation
US6630226B1 (en) * 1997-03-14 2003-10-07 Speed France Composite cutting line for brush cutters and edge trimmers
US6119350A (en) * 1997-05-23 2000-09-19 Trim-A-Lawn Corporation Rotary cutting member for lawn trimmers
US6061914A (en) * 1997-07-23 2000-05-16 Speed France Cutting line with improved degradability for brush cutters and edge trimmers
US6094823A (en) * 1997-07-23 2000-08-01 Jenn Feng Industrial Company, Ltd. Method and apparatus for anchoring flails on a string trimmer
US5987756A (en) * 1997-07-23 1999-11-23 Mcculloch Corporation Head and head assembly for a string trimmer
US6124034A (en) * 1997-09-23 2000-09-26 Proulx Manufacturing, Inc. Process for forming double-strand edged monofilament line for use in line trimmers
US6171697B1 (en) * 1999-02-03 2001-01-09 Speed France Cutting line or fishing line made of synthetic material
US6874235B1 (en) * 1999-05-20 2005-04-05 Speed France Noise reducing cutting wire for bush cutter and hedge-trimmer
US6560878B2 (en) * 2000-04-12 2003-05-13 Shakespeare Company, Llc Multi-component, extruded vegetation cutting line
US7000324B2 (en) * 2000-12-15 2006-02-21 Robert L. Phillips Top loading fixed line trimmer head
US6910277B2 (en) * 2001-08-29 2005-06-28 Proulx Manufacturing, Inc. Noise attenuating flexible cutting line for use in rotary vegetation trimmers and method of manufacture
US20050028390A1 (en) * 2001-09-03 2005-02-10 Emmanuel Legrand Cutting wire for brush cutters and edge trimmers
US20050081389A1 (en) * 2002-06-07 2005-04-21 Emmanuel Legrand Cutting unit and cutting filament for a plant cutting device
US20050188547A1 (en) * 2002-06-07 2005-09-01 Emmanuel Legrand Cutting string for plant cutting appliance
US20070123092A1 (en) * 2003-05-14 2007-05-31 Emmanuel Legrand Novel cutting wire for devices such as edge trimmers or brush cutters
US7257898B2 (en) * 2004-04-16 2007-08-21 Kwik Products, Inc. Cutting head for string trimmer

Also Published As

Publication number Publication date
FR2881022A1 (fr) 2006-07-28
EP1683406A1 (de) 2006-07-26
EP1683406B1 (de) 2008-06-25
DE602006001522D1 (de) 2008-08-07
FR2881022B1 (fr) 2007-04-06

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SPEED FRANCE, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEGRAND, EMMANUEL;REEL/FRAME:017622/0546

Effective date: 20060404

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION