All-steel clothing for a carding machine

Abstract

An all-steel clothing for a flat card or roller card for processing textile fibers includes a sawtooth wire having teeth arranged one after another in a wire running direction. The tooth contour of the teeth is defined, starting from a tooth base, as at least transitioning into a tooth back, further transitioning into a tooth tip portion, further transitioning into a tooth face and again transitioning into a subsequent tooth base. The tooth tip portion has a predetermined tooth tip length (L) in the wire running direction and a tooth prominence on top of a part of the tooth tip portion. The tooth prominence has a tooth prominence length (l) which is less than the tooth tip length (L).

Claims

1. An all-steel clothing for a flat card or roller card for processing textile fibres, comprising: a sawtooth wire having teeth formed one after another in a wire running direction, the teeth having a tooth contour defined, starting from a tooth base, as at least transitioning into a tooth back, further transitioning into a tooth tip portion, further transitioning into a tooth face and again transitioning into a subsequent tooth base, wherein the tooth tip portion has a predetermined tooth tip length (L) in the wire running direction, and a tooth prominence is set on top of a part of the tooth tip portion, the tooth prominence having a tooth prominence length (l) which is less than the tooth tip length (L) and corresponds to 10% to 20% of the length of the tooth pitch from tooth tip to tooth tip.

2. The all-steel clothing according to claim 1, wherein the tooth prominence length (l) is from 10% to 50% of the tooth tip length (L).

3. The all-steel clothing according to claim 1, wherein the tooth prominence is formed on the tooth tip portion adjacent to the tooth face so that the tooth contour in a transition from the tooth prominence to the tooth face forms a tooth tip.

4. The all-steel clothing according to claim 1, wherein the tooth prominence has a prominence top of planar construction.

5. The all-steel clothing according to claim 4, wherein the tooth prominence has a prominence back behind the prominence top that is part of the tooth contour approximately parallel to that portion of the tooth face which is located at a same height.

6. The all-steel clothing according to claim 4, wherein the prominence top is one of parallel to the wire running direction or has a slope of up to 3 relative to the wire running direction of the sawtooth wire, in which case the prominence top drops down in a direction of the prominence back as a result of the slope.

7. The all-steel clothing according to claim 1, wherein a face angle (a) between the tooth face and a perpendicular to the wire running direction has a value of from 50 to 60.

8. The all-steel clothing according to claim 1, wherein the tooth prominence length (l) is from 15% to 25% of the tooth tip length (L).

9. The all-steel clothing according claim 1, wherein a face angle () between the tooth face and a perpendicular to the wire running direction has a value of 50 to 60.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further measures which improve the invention are described in greater detail hereinbelow together with the description of a preferred example of an embodiment of the invention, referring to the Figures, wherein:

(2) FIG. 1 shows a side view of a portion of the sawtooth wire having a tooth contour which has a tooth prominence on a tooth tip portion according to the invention,

(3) FIG. 2 shows a sectional view through the sawtooth wire, and

(4) FIG. 3 shows a detailed view of a tooth of the sawtooth wire having the features according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

(5) FIG. 1 shows a portion of a sawtooth wire 10 of an all-steel clothing for a flat card or roller card for processing textile fibres. The sawtooth wire 10 has a wire running direction 11, which is defined by the course of the bottom side 21 of the sawtooth wire 10. In the portion of sawtooth wire 10 there are shown two teeth 12; the teeth 12 have tooth tips 18, which point in the wire running direction 11.

(6) The tooth contour of the teeth 12 is defined by several portions; the tooth contour starts with a tooth base 13, which transitions into a tooth back 14; the tooth back 14 is located on that side of the tooth 12 which is opposite the wire running direction 11. Making a transition from the tooth back 14 there follows a tooth tip portion 15, which can extend parallel to the wire running direction 11 or the tooth tip portion 15 has a slope in the direction of the tooth back 14. The tooth tip portion 15 further transitions into a tooth prominence 17 according to the invention; and the tooth prominence 17 transitions into a tooth face 16 in the course of which it forms the tooth tip 18, the tooth face 16 facing in the direction of the wire running direction 11 and being extended by the height of the tooth prominence 17. Finally, the tooth face 16 again transitions into the subsequent tooth base 13.

(7) FIG. 2 shows a side view of the sawtooth wire 10; the base portion 22 of the sawtooth wire 10 is of wider construction than the width of the tooth 12, which is adjacent to the top of the base portion 22. The cross-section, which is indicated in FIG. 1, lies between two teeth 12 and is delimited at the top by the tooth base 13.

(8) Finally, FIG. 3 shows a detailed view of a tooth 12 of the sawtooth wire 10, the tooth contour of the tooth 12 being shown in detail with the individual portions. Starting from the tooth base 13, the tooth back 14, which delimits the tooth 12 opposite to the wire running direction 11, follows on first. The tooth back 14 transitions into the tooth tip portion 15, which has a length L. At the front end of the tooth tip portion 15, which transitions into the tooth face 16, there is formed, on top of the tooth tip portion 15, a tooth prominence 17, and the tooth prominence 17 has the tooth prominence length l. The contour there transitions from the rear of the tooth tip portion 15 into a prominence back 20 and the prominence back 20 transitions into a prominence top 19. At the front of the tooth prominence 17, the contour of the tooth face 16 transitions into the prominence top 19, forming the tooth tip 18. The face angle can be measured there between the tooth face 16 and the perpendicular to the wire running direction 11.

(9) The view shows, approximately, the size relationships of the tooth prominence 17 to the tooth 12 and the view especially shows the tooth prominence length l, which is smaller than the tooth tip length L. For example, the tooth prominence length l can be from 10% to 50% and preferably from 15% to 25% of the tooth tip length L, the example showing that the tooth prominence length l is approximately 20% of the tooth tip length L.

(10) If the sawtooth wire 10 is re-ground, re-grinding is carried out on the prominence top 19 of the tooth prominence 17. The sawtooth wire 10 herein can be repeatedly re-ground until the tooth prominence 17 on the tooth tip portion 15 has almost disappeared and the tooth tip portion 15 extends as far as the tooth tip 18 which has moved down into the region of the interrupted line, as shown in the Figure.

(11) The invention is not limited in its execution to the preferred example of an embodiment described hereinbefore. Rather, many variants are feasible, which make use of the described solution even in the case of embodiments of fundamentally different form. All features and/or advantages, including structural details and spatial arrangements, arising out of the claims, description or drawings can be essential to the invention both on their own and also in the widest variety of combinations.

REFERENCE NUMERALS AND LETTERS

(12) 10 sawtooth wire

(13) 11 wire running direction

(14) 12 tooth

(15) 13 tooth base

(16) 14 tooth back

(17) 15 tooth tip portion

(18) 16 tooth face

(19) 17 tooth prominence

(20) 18 tooth tip

(21) 19 prominence top

(22) 20 prominence back

(23) 21 bottom side

(24) 22 base portion

(25) face angle

(26) L tooth tip length

(27) l tooth prominence length