CA1093289A - Felting needle - Google Patents
Felting needleInfo
- Publication number
- CA1093289A CA1093289A CA277,648A CA277648A CA1093289A CA 1093289 A CA1093289 A CA 1093289A CA 277648 A CA277648 A CA 277648A CA 1093289 A CA1093289 A CA 1093289A
- Authority
- CA
- Canada
- Prior art keywords
- needle
- felting
- barb
- operating part
- groove
- 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
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
A felting needle having on its forward operating part a barbed portion with at least one barb, the operating end of the needle having a smooth rear portion which is strengthened by about 10- 20% (preferably 16%) as compared to the forward barbed portion of the operating part of the needle. The barb or barbs have radius rounding of the base surface of the groove, the forward surface of the barb, and the root of the barb.
A felting needle having on its forward operating part a barbed portion with at least one barb, the operating end of the needle having a smooth rear portion which is strengthened by about 10- 20% (preferably 16%) as compared to the forward barbed portion of the operating part of the needle. The barb or barbs have radius rounding of the base surface of the groove, the forward surface of the barb, and the root of the barb.
Description
los32sg The present invention relates to a felting needle, which is used for felting operations, and for proces~ing man-made fibers, floor coverings, artificial leathers, and the like, Felting needles of the prior art, made without streng-thening of the rear portion of the forward operating part thereof and without radius rounding of the surface of the barb or barbs were very often broken during a felting operation. This known construction of the barbs has caused the damaging of the fibers by being cut by the edges of the barbs. The breaking of the needles means that the needles must be changed in the basic disk in which they are mounted, and the breaking of the needle also caused mechanical damage to the surface of the manufactured floor covering being worked upon. These disadvantages of prior art felting needles have caused the slowing down of manufacture of floor coverings, and the resulting floor covering was not of high quality, usually when a needle broke the floor covering had to be designate~ a "second", that is, of lower than ideal quality.
These disadvantages are overcome by the use of felting needles according to the present invention comprising a forward operating part having a forward barbed portion and a smooth rear portion, at least one barb on the forward portion, the barb having a groove and a projection from the body of the needle rearwardly of the groove, the groove and projection forming the barb, the rear portion of the operating part of the needle having a cross-sectional area which is about 10 - 20% greater than that of the forward portion of the operating part of the needle, the base surface of the groove, the front suxface of the barb, and the root of the barb being radius rounded.
As above mentioned, the smooth rear portion of the forward operating part of the felting needle is made stronger than the forward barbed portion of the foward operating part 1~3289 of the needle, which is provided with one or more barbs. The strengthening of the smooth rear portion of the forward operating part is about 10 - 20% (advantageously about 16%) as compared to the barbed forward portion of the operating part is accom-plished by making the rear portion of the operating part with a cross sectional area which is 10 - 20% (preferably about 16%) greater than that of the barbed portion of the forward operating part, and by making the edges of the barbs rounded on a radius.
Thus, the barbs have a radius rounding of the base surface of the groove which leads to the barb proper, and a radius rounding of the front surface of the barb as well as of the root of the barb. Felting needles made in accordance with the invention are especially characterized by their high durability, which results from the strengthening of the rear operating part of the felting needle and from the radius rounding of all surfaces and edge~
of the barbs.
Felting needles in accordance with the invention are much more efficient than previously known felting needles, with the high durability of felting needles according to the inven-tion economies of manufacture result and all products Inade withsuch needles have a higher quality than that of products made by the use of known prior art felting needles.
The invention will be more readily understood by refer-ence to the accompanying drawings in which: -Fig. 1 is a front elevation of a first embodiment ofa felting needle in accordance with the invention, Fig. 2 is a detail of a barb on the needle of Fig. 1, the ~iew being in perspective;
Fig. 2a is a fragmentary view in plan of the barb of Fig. 2;
Fig. 3 i~ a view in transverse section of the radius proper, and of the front surface of the barb on the needle, the section being taken along the line 3 - 3 in Fig. 2a;
Fig. 4 is a view in cross section of the felting needle taken along line 4-4 in Fig. l;
Fig. 5 is a view in ~ross section of the felting needle taken along line 5 - 5 in Fig. l; and Fig. 6 is a complete view of a felting needle in accordance with the invention.
Turning now to the drawing, and particularly Figs. 1 -5 incl., the felting needle A there shown has a forward operatingpart 1, 2, portion 1 being provided with a number of barbs , and a smooth rear portion 2 of appreciably larger cross section.
As shown in Figs. 4 and 5, both of portions 1 and 2 are of generally triangular cross section. A barb generally designated 3 is shown in detail in Figs. 2 and 2a. A groove having a rounded base surface 4 is cut into the surface along an apex of the triangular cross section of the needle. Such groove is inclined rearwardly and toward the axis of the needle at an angle 7 (Fig. 2). The base surface 4 of the groove, the front surface of the barb proper 5, and the root 6 of the barb are all curved on a radius as shown, that is, the surfaces of the barbs are rounded in transverse section. The shape of the rounding is well shown in Fig. 3.
The strengthening oonstruction of the rear portion 2 of the forward operating part 1, 2 of the felting needle prevents the bending of the needle, and thus it is insured that the tip at the forward end of the felting needle passes through the openings in the disk and so the felting needles of the inven-tion are not often broken. Although sometimes the felting needles of the invention are broken, they are always broken in the area between the weaker barbed portion 1 and the thicker, stronger smooth rear portion 2, that is, in the area ~ between the forward barbed portion 1 and the rear portion 2 of the forward operating part 1, 2. Area 8 is of generally frusto-pyramidal shape as shown.
The purpose of the radius rounding of the surfaces 4 and 6 and the rounded edges of the barb proper 5 is to prevent damaging the fibers by cutting them, and also results in a higher productivity of the felting machines. With this construction of the surfaces and edges of the barb, the barbs last longer.
Because of that, the depth of the barb and the ease of punching the material being felted by the needle do not change appreciably over very substantial periods of use of the felting needle.
As shwon in Fig. 6 the felting needle has a shank portion 9, 10, 11 rearwardly of the forward operating part 1,2.
Parts 10 and 11 of the shank are of circular cross-section, part 11 being bent at 90 with respect to part 10. Part 9 is generally of frusto-conical shape, serving as a zone of transition from the triangular cross-section of portion 2 and the larger, circular section of part 10 of the shank. However this shank portion is known in the art and does not form part of the present invention.
With the described construction of the barb of the felting needle of the invention there result a higher durability of the needles, an increase of about 60 - 80% in useful life, and a better working-out of the fibers. As above stated, the higher efficiency of the felting needle of the invention results from its strengthening in the rear operating part 2 thereof and by using rounded surfaces and edges at the barb on the forward part 1 thereof.
The felting needle of the invention has been extensi-vely tested and used by Czechoslovak national enterprises inthe production of floor coverings, felting pads of the plastics industry, and for further felting products in gen~ral.
10~3289 Thus, RETEX, narodni podnik, of Ivandice, Czechoslova-kia has tested felting needles in accordance with Figs. 1 - 5 incls., on most difficult work, the joining the reverse side and the face of material weighing substantially about 960 -1000 g/~
During the test work were also used prior art needles made by a well-known company. One half of the tested material was worked with the prior art felting needles and the second half of the test~d material was worked with felting needles A of the present invention.
In the test, which was done by the Research Institute VUV of Brno, the samples were tested according to the norm for these methods.
Since felting machines when using felting needles A
were quiet, it was therefore possible to increase the speed of production of these felting machines about 6 - 7 percent. Even after increasin~ the speed, the goods were of high quality.
8reaking of felting needles A is lower, and conse-quently the consumption of such felting needles was lower. The technological limit of consumption of the prior art felting needles was 0.86 felting needle /1 m , whereas the consumption of needles A was 0.42 felting needle / 1 m2.
The new shape of the barbs with rounded surfaces, causes less damage to felting needles A and better interlacing of the felting fibers. This effect is in consequence with high production speed and it gives good results in regard to abrasion and piling effects.
The invention can be used in all kinds of felting needles, which are used for different kinds and thicknesses of working materials. It is understood that felting needles in accordance with the invention will differ as to length, the size of their cross section, and the number of the barbs on each .- 5 --needle depending upon the material being worked upon.
Although the invention is illustrated and described with reference to two preferred embodiments thereof, it is to be expressly understood that it is in no way limited to the disclosure of such preferred embodiments, but it is capable Or numerous modifications within the scope of the appended claims.
~: '`'''
These disadvantages are overcome by the use of felting needles according to the present invention comprising a forward operating part having a forward barbed portion and a smooth rear portion, at least one barb on the forward portion, the barb having a groove and a projection from the body of the needle rearwardly of the groove, the groove and projection forming the barb, the rear portion of the operating part of the needle having a cross-sectional area which is about 10 - 20% greater than that of the forward portion of the operating part of the needle, the base surface of the groove, the front suxface of the barb, and the root of the barb being radius rounded.
As above mentioned, the smooth rear portion of the forward operating part of the felting needle is made stronger than the forward barbed portion of the foward operating part 1~3289 of the needle, which is provided with one or more barbs. The strengthening of the smooth rear portion of the forward operating part is about 10 - 20% (advantageously about 16%) as compared to the barbed forward portion of the operating part is accom-plished by making the rear portion of the operating part with a cross sectional area which is 10 - 20% (preferably about 16%) greater than that of the barbed portion of the forward operating part, and by making the edges of the barbs rounded on a radius.
Thus, the barbs have a radius rounding of the base surface of the groove which leads to the barb proper, and a radius rounding of the front surface of the barb as well as of the root of the barb. Felting needles made in accordance with the invention are especially characterized by their high durability, which results from the strengthening of the rear operating part of the felting needle and from the radius rounding of all surfaces and edge~
of the barbs.
Felting needles in accordance with the invention are much more efficient than previously known felting needles, with the high durability of felting needles according to the inven-tion economies of manufacture result and all products Inade withsuch needles have a higher quality than that of products made by the use of known prior art felting needles.
The invention will be more readily understood by refer-ence to the accompanying drawings in which: -Fig. 1 is a front elevation of a first embodiment ofa felting needle in accordance with the invention, Fig. 2 is a detail of a barb on the needle of Fig. 1, the ~iew being in perspective;
Fig. 2a is a fragmentary view in plan of the barb of Fig. 2;
Fig. 3 i~ a view in transverse section of the radius proper, and of the front surface of the barb on the needle, the section being taken along the line 3 - 3 in Fig. 2a;
Fig. 4 is a view in cross section of the felting needle taken along line 4-4 in Fig. l;
Fig. 5 is a view in ~ross section of the felting needle taken along line 5 - 5 in Fig. l; and Fig. 6 is a complete view of a felting needle in accordance with the invention.
Turning now to the drawing, and particularly Figs. 1 -5 incl., the felting needle A there shown has a forward operatingpart 1, 2, portion 1 being provided with a number of barbs , and a smooth rear portion 2 of appreciably larger cross section.
As shown in Figs. 4 and 5, both of portions 1 and 2 are of generally triangular cross section. A barb generally designated 3 is shown in detail in Figs. 2 and 2a. A groove having a rounded base surface 4 is cut into the surface along an apex of the triangular cross section of the needle. Such groove is inclined rearwardly and toward the axis of the needle at an angle 7 (Fig. 2). The base surface 4 of the groove, the front surface of the barb proper 5, and the root 6 of the barb are all curved on a radius as shown, that is, the surfaces of the barbs are rounded in transverse section. The shape of the rounding is well shown in Fig. 3.
The strengthening oonstruction of the rear portion 2 of the forward operating part 1, 2 of the felting needle prevents the bending of the needle, and thus it is insured that the tip at the forward end of the felting needle passes through the openings in the disk and so the felting needles of the inven-tion are not often broken. Although sometimes the felting needles of the invention are broken, they are always broken in the area between the weaker barbed portion 1 and the thicker, stronger smooth rear portion 2, that is, in the area ~ between the forward barbed portion 1 and the rear portion 2 of the forward operating part 1, 2. Area 8 is of generally frusto-pyramidal shape as shown.
The purpose of the radius rounding of the surfaces 4 and 6 and the rounded edges of the barb proper 5 is to prevent damaging the fibers by cutting them, and also results in a higher productivity of the felting machines. With this construction of the surfaces and edges of the barb, the barbs last longer.
Because of that, the depth of the barb and the ease of punching the material being felted by the needle do not change appreciably over very substantial periods of use of the felting needle.
As shwon in Fig. 6 the felting needle has a shank portion 9, 10, 11 rearwardly of the forward operating part 1,2.
Parts 10 and 11 of the shank are of circular cross-section, part 11 being bent at 90 with respect to part 10. Part 9 is generally of frusto-conical shape, serving as a zone of transition from the triangular cross-section of portion 2 and the larger, circular section of part 10 of the shank. However this shank portion is known in the art and does not form part of the present invention.
With the described construction of the barb of the felting needle of the invention there result a higher durability of the needles, an increase of about 60 - 80% in useful life, and a better working-out of the fibers. As above stated, the higher efficiency of the felting needle of the invention results from its strengthening in the rear operating part 2 thereof and by using rounded surfaces and edges at the barb on the forward part 1 thereof.
The felting needle of the invention has been extensi-vely tested and used by Czechoslovak national enterprises inthe production of floor coverings, felting pads of the plastics industry, and for further felting products in gen~ral.
10~3289 Thus, RETEX, narodni podnik, of Ivandice, Czechoslova-kia has tested felting needles in accordance with Figs. 1 - 5 incls., on most difficult work, the joining the reverse side and the face of material weighing substantially about 960 -1000 g/~
During the test work were also used prior art needles made by a well-known company. One half of the tested material was worked with the prior art felting needles and the second half of the test~d material was worked with felting needles A of the present invention.
In the test, which was done by the Research Institute VUV of Brno, the samples were tested according to the norm for these methods.
Since felting machines when using felting needles A
were quiet, it was therefore possible to increase the speed of production of these felting machines about 6 - 7 percent. Even after increasin~ the speed, the goods were of high quality.
8reaking of felting needles A is lower, and conse-quently the consumption of such felting needles was lower. The technological limit of consumption of the prior art felting needles was 0.86 felting needle /1 m , whereas the consumption of needles A was 0.42 felting needle / 1 m2.
The new shape of the barbs with rounded surfaces, causes less damage to felting needles A and better interlacing of the felting fibers. This effect is in consequence with high production speed and it gives good results in regard to abrasion and piling effects.
The invention can be used in all kinds of felting needles, which are used for different kinds and thicknesses of working materials. It is understood that felting needles in accordance with the invention will differ as to length, the size of their cross section, and the number of the barbs on each .- 5 --needle depending upon the material being worked upon.
Although the invention is illustrated and described with reference to two preferred embodiments thereof, it is to be expressly understood that it is in no way limited to the disclosure of such preferred embodiments, but it is capable Or numerous modifications within the scope of the appended claims.
~: '`'''
Claims (4)
1. A felting needle comprising a forward operating part having a forward barbed portion and a smooth rear portion, at least one barb on the forward portion, the barb having a groove and a projection from the body of the needle rearwardly of the groove, the groove and projection forming the barb, the rear portion of the operating part of the needle having a cross-sectional area which is about 10- 20% greater than that of the forward portion of the operating part of the needle, the base surface of the groove, the front surface of the barb, and the root of the barb being radius rounded.
2. A felting needle according to claim 1, wherein the rear portion of the forward operating part of the needle has a cross-sectional area which is about 16% greater than that of the forward, barbed portion of the operating part of the needle.
3. A felting needle according to claim 1, wherein the forward and rear portions of the operating part of the needle are joined by a rearwardly diverging frustum area which merges smoothly at its respective ends with the forward and rear portions of the operating part of the needle.
4. A felting needle according to claim 1, wherein the forward barbed portion and the smooth rear portion are both of triangular cross-section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS298976A CS185428B1 (en) | 1976-05-05 | 1976-05-05 | Punching needle |
| CSPV2989-76 | 1976-05-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1093289A true CA1093289A (en) | 1981-01-13 |
Family
ID=5368667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA277,648A Expired CA1093289A (en) | 1976-05-05 | 1977-05-04 | Felting needle |
Country Status (7)
| Country | Link |
|---|---|
| CA (1) | CA1093289A (en) |
| CS (1) | CS185428B1 (en) |
| DD (1) | DD129457A1 (en) |
| DE (1) | DE2717044A1 (en) |
| HU (1) | HU174589B (en) |
| PL (1) | PL104104B1 (en) |
| SE (1) | SE7704349L (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011016755B3 (en) * | 2011-04-12 | 2012-10-04 | CU4motion GmbH | Arrangement and method for mounting and / or disassembling and maintaining a needle board |
-
1976
- 1976-05-05 CS CS298976A patent/CS185428B1/en unknown
-
1977
- 1977-04-15 SE SE7704349A patent/SE7704349L/en not_active Application Discontinuation
- 1977-04-18 DE DE19772717044 patent/DE2717044A1/en not_active Withdrawn
- 1977-04-28 DD DD19863977A patent/DD129457A1/en unknown
- 1977-04-29 HU HU77IA784A patent/HU174589B/en not_active IP Right Cessation
- 1977-05-04 PL PL19786677A patent/PL104104B1/en unknown
- 1977-05-04 CA CA277,648A patent/CA1093289A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE7704349L (en) | 1977-11-06 |
| HU174589B (en) | 1980-02-28 |
| CS185428B1 (en) | 1978-09-15 |
| PL104104B1 (en) | 1979-07-31 |
| DD129457A1 (en) | 1978-01-18 |
| DE2717044A1 (en) | 1977-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |