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 PDFInfo
- 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
- Authority
- 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
Links
Images
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)
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)
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)
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 |
-
2005
- 2005-01-24 FR FR0500702A patent/FR2881022B1/fr not_active Expired - Fee Related
-
2006
- 2006-01-23 US US11/337,308 patent/US20070036976A1/en not_active Abandoned
- 2006-01-23 DE DE602006001522T patent/DE602006001522D1/de active Active
- 2006-01-23 EP EP06100728A patent/EP1683406B1/de active Active
Patent Citations (35)
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 |