US3792512A - Fork needle - Google Patents

Fork needle Download PDF

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Publication number
US3792512A
US3792512A US00239437A US3792512DA US3792512A US 3792512 A US3792512 A US 3792512A US 00239437 A US00239437 A US 00239437A US 3792512D A US3792512D A US 3792512DA US 3792512 A US3792512 A US 3792512A
Authority
US
United States
Prior art keywords
tines
needle
fork needle
fork
crotch
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 - Lifetime
Application number
US00239437A
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English (en)
Inventor
J Zocher
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.)
SINGER SPEZIALNADELFABRIK A CORP OF WEST GERMANY GmbH
SSMC Inc
Original Assignee
Singer Co
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 Singer Co filed Critical Singer Co
Application granted granted Critical
Publication of US3792512A publication Critical patent/US3792512A/en
Assigned to SINGER SPEZIALNADELFABRIK GMBH, A CORP OF WEST GERMANY reassignment SINGER SPEZIALNADELFABRIK GMBH, A CORP OF WEST GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SINGER COMPANY, THE, A CORP OF NJ
Assigned to SSMC INC., A CORP. OF DE reassignment SSMC INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SINGER COMPANY, THE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/02—Needling machines with needles

Definitions

  • ABSTRACT A fork needle for punching out fibres from a precompacted fibre web to form a tufted loop pile structure on one surface of the web.
  • the needle includes at least a pair of spaced tines having the cross section of the crotch therebetween arcuately curved, andpreferably circular, across the entire width of each tine.
  • a fork needle having one tine substantially longer than the other tine.
  • a fork needle in which the length of the tines are substan-- tially greater than the spacingbetween the tines.
  • This invention relates to needles and more particularly to a needle for producing non-woven fabrics having a tufted loop pile structure on one of its surfaces.
  • a relatively recent process for forming non-woven fabrics is that of driving the fibres of a pre-compacted web through the web itself to cause them to protrude as loops from one of the faces of the web.
  • This process which for example is shown in US. Pat. No. 3,579,763, produces a product approaching the qualities of tufted fabrics, but at a substantially reduced cost.
  • the needles used during this process have at least two terminal points separated by a recess or crotch.
  • These needles, which are known in the art as fork needles are presently of a design in which the basic shape of the fork represents the blade half of the eye of a sewing machine needle.
  • the present invention overcomes these deficiencies of the prior art needles by providing a fork needle in which the conventional grooves have been eliminated and in which the cross section -of the crotch between the fork tines has beenarcuately curved.
  • the arcuately curved cross section of the crotch is an are 0 a circle.
  • a further object is to provide a fork needle having increased strength at the crotch between the tines and which is therefore less likely to break at that location.
  • Another object of this invention is to provide a fork needle which reduces the fibre distortion and which re-' cutes needle breakage by distributing the forces over different portions of the needle during the penetration and loop forming stages.
  • FIG. 3 is a view of the needle shown in FIG. 2 but turned substantially at right angles thereto, and partially broken away and cross sectioned along line 3-3 of FIG. 2;
  • FIG. 4 is an elevational view of a portion of a needle illustrating a second aspect of the invention.
  • FIG. 5 is a cross sectional view of the needle shown in FIG. 4 taken along line 55 of FIG. 4;
  • FIG. 6 is an elevational view of a portion of a needle illustrating a third aspect of the invention.
  • FIG. 7 is a cross sectional view of the needle shown in FIG. 6 taken along line 7-7.
  • FIG. 1 illustrates a typical prior art fork needle of thetype used in the aforesaid US. Pat. No. 3,579,763 to draw fibres out of a precompacted fibre web by needle punching to form a loop pile structure on the undersurface thereof.
  • the fork of the needle is formed by a pair of tines, of which 12 is illustrative.
  • the crotch 14 between the tines of the prior art needles is substantially flat.
  • distortion of the fibres occurs as the loops are formed during the process.
  • the prior art needles include grooves 16 and 18 extending from the crotch between the tines on opposite sides thereof for a small distance down the blade 20 of the needle. These grooves in effect reduce the cross sectional area of the needle and increase the tendency to break during penetration of a needle into the web.
  • the present invention as embodied in the needle shown in FIGS. 2 and 3 and designated generally as 100, includes at the pointed end 110 a pair of spaced tines 112 and 113.
  • the tines are joined at a crotch 114 which as seen in FIG. 3 is arcuate in cross sectional configuration.
  • this cross sectional configuration is circular and extends entirely across the maximum width of the tines from 115 to 116.
  • the crotch preferably smoothly merges with the tines in the direction of the tip, as shown by the circular shape of the crotch 114 in FIG. 2.
  • a fork needle having this cross sectional configuration of the crotch, smoothly rather than abruptly forces the fibres through the web to form loops.
  • FIGS. 2 and 3 are conventional and includes a blade portion 117 extending to a shank 118 and a crank portion 120 which is conventionally mounted in a needle board.
  • the needles shown inFIGS. 2 and 3 may be manufactured easily by a die pressing process.
  • the needle shown in FIGS. 4 and 5 disclose a further aspect of the present invention in that tines 212 and 213 are of a different lengths. This reduces the shock on the needle as the tines separately penetrate the web as compared to the shock when tines of equal length are together driven through the web.
  • an initial penetration force occurs when the tine 212 penetrates the web and a second penetration force occurs when the tines 213 penetrates the web. Since each of these penetration forces is smaller than the simultaneous force occurring on the needle of FIGS. 2 and 3, the overall impact forces on the needle is reduced.
  • FIGS. 6 and 7 A third aspect of the present invention is disclosed in FIGS. 6 and 7 wherein the tines 312 and 313 are greatly elongated.
  • the initial shock of impact of the points of the tines 312 and 313 into the web is greatly dissipated relative to a short tine needle by the time the crotch 314 acts on the fibres to force them through the web.
  • the tines 312 and 313 may be longitudinally tapered toward each other in this embodiment to reduce further the initial penetration force.
  • This long tine configuration also features the possibility of manually opening or closing the space between the tines to allow capture of more or less fibres, thereby to extend the range of use of a given needle.
  • the cross sectional configuration of this needle at the crotch is of course the same as that of the other needles of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Sewing Machines And Sewing (AREA)
US00239437A 1972-03-30 1972-03-30 Fork needle Expired - Lifetime US3792512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23943772A 1972-03-30 1972-03-30

Publications (1)

Publication Number Publication Date
US3792512A true US3792512A (en) 1974-02-19

Family

ID=22902122

Family Applications (1)

Application Number Title Priority Date Filing Date
US00239437A Expired - Lifetime US3792512A (en) 1972-03-30 1972-03-30 Fork needle

Country Status (7)

Country Link
US (1) US3792512A (de)
JP (1) JPS5257262Y2 (de)
BE (1) BE794830A (de)
DE (1) DE7306932U (de)
FR (1) FR2178568A5 (de)
GB (1) GB1407214A (de)
IT (1) IT967845B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972096A (en) * 1974-10-16 1976-08-03 The Torrington Company Felting needle
US4110875A (en) * 1977-05-23 1978-09-05 Foster Needle Company Swaged needle
US4309800A (en) * 1979-08-02 1982-01-12 Foster Needle Co. Felting needle
US20050251978A1 (en) * 2004-05-13 2005-11-17 Groz-Beckert Kg Structuring needle for trating fiber webs
US10596633B1 (en) * 2017-01-19 2020-03-24 Consolidated Nuclear Security, LLC Shaped cutting tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022813A (en) * 1957-07-25 1962-02-27 Glover Benjamin Marshall Method of making bonded non-woven fabric from textile fibers
US3579763A (en) * 1966-04-27 1971-05-25 Sommer Sa Method of nonwoven cloth manufacture
US3727276A (en) * 1971-04-06 1973-04-17 E Foster Felting needle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022813A (en) * 1957-07-25 1962-02-27 Glover Benjamin Marshall Method of making bonded non-woven fabric from textile fibers
US3579763A (en) * 1966-04-27 1971-05-25 Sommer Sa Method of nonwoven cloth manufacture
US3727276A (en) * 1971-04-06 1973-04-17 E Foster Felting needle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972096A (en) * 1974-10-16 1976-08-03 The Torrington Company Felting needle
US4110875A (en) * 1977-05-23 1978-09-05 Foster Needle Company Swaged needle
US4309800A (en) * 1979-08-02 1982-01-12 Foster Needle Co. Felting needle
US20050251978A1 (en) * 2004-05-13 2005-11-17 Groz-Beckert Kg Structuring needle for trating fiber webs
US7761964B2 (en) 2004-05-13 2010-07-27 Groz-Beckert Kg Structuring needle for treating fiber webs
US10596633B1 (en) * 2017-01-19 2020-03-24 Consolidated Nuclear Security, LLC Shaped cutting tool

Also Published As

Publication number Publication date
BE794830A (fr) 1973-05-16
DE7306932U (de) 1973-06-20
GB1407214A (en) 1975-09-24
FR2178568A5 (de) 1973-11-09
JPS4922288U (de) 1974-02-25
IT967845B (it) 1974-03-11
JPS5257262Y2 (de) 1977-12-24

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SINGER SPEZIALNADELFABRIK GMBH, BAHNHOFSTR. 41-79,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SINGER COMPANY, THE, A CORP OF NJ;REEL/FRAME:004647/0795

Effective date: 19861217

AS Assignment

Owner name: SSMC INC., A CORP. OF DE, CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SINGER COMPANY, THE;REEL/FRAME:005041/0077

Effective date: 19881202