US 3528137 A
Description (OCR text may contain errors)
p 15, 1970 G. ROTSAERT 3,528,137
LINING ASSEMBLY FOR CARDING ROLLER Filed Oct. 21, I968 v I 2 Sheets-Sheet 1 United States Patent 3,528,137 LINING ASSEMBLY FOR CARDING ROLLER Georges Rotsaert, 40 Rue de Beaucourt 59, Roubaix, France Filed Oct. 21, 1968, Ser. No. 769,162 Claims priority, application France, Nov. 24, 1967,
rm. or. plu 15/84 US. Cl. 19-114 8 Claims ABSTRACT OF THE DISCLOSURE The unknotting and the straightening of fibres of natural or artificial textile material call upon carding machines which separate the fibres one from the other, straighten them, make them parallel, clean them and eliminate the unevennesses and the knots.
In some carding machines there can be distinguished a cylinder or drum on the one hand and on the other hand the caps of the cards disposed on chain conveyors which make them follow along a path of their trajectory a curve concentric to the cylinder.
At the present time the linings assume the shape of laminated steel wires forming a heel seat and a blade in which are cut teeth.
In rigid linings can be distinguished three three principal types: the normal wire wound side by side, the wire mounted in nets made on the cylinders and finally the wire mounted side by side with self-locking in which the base of one coil covers or partially fits in the base of the preceding coil.
However, these linings have various disadvantages: with the normal wire wound side by side, if one of the coils breaks, either upon mounting or under the carding effort, the whole can unwind and seriously damage the machine and even hurt the persons around the machine; moreover, for fine heels (six tenths of a millimeter for example) this wire lacks stability for lining.
With wires placed in nets, it is difficult to obtain a heel which corresponds exactly to the width of the grooves; also the play which exists causes a laminating of said grooves and thus after two or three linings it is necessary to make new nets which is very expensive.
With respect to the last type of wire of the so called self-locking type, each coil is fixed on a following coil but if during lining the wire breaks or if the last coil comes loose the whole can unwind and severely harass the rest of the members.
Additionally in all these assemblies the heel is very massive which considerably increases the weight and the inertia of the cylinders and requires a considerable lining tension, this tension causing with time deformations of the cylinders unless there is used a special very robust material which is thus very expensive and difficult to transport.
To facilitate the winding of these massive linings, the builder must obtain a relatively soft heel, but on the other hand he requires very hard points which resist impacts and wear. Also there is always a transition zone between the hardened and the non-hardened part. Owing to this fact, in particular for certain carding where there is interest in using fine elongated teeth, the difficulty resides in obtaining a good hardening up to the base of the teeth without burning the extremity of the point while obtaining a heel which is relatively soft.
3,528,137 Patented Sept. 15,, 1970 ice The present invention which has for its purpose to avoid all these drawbacks has for its object a rigid lining for cylinders or drums and caps for cards.
It is characterized in that it is constituted essentially from a judiciously profiled sheet of metal so as to have on the one hand a blade in which are cut teeth and on the other hand a height flexible heel, this heel being able not only to fit laterally inside but to be pinched or snap-fittingly engaged by the inner part of the heel of the contiguous coil, each coil being accordingly fast on the preceding and following coil.
The invention will be better understood with the aid of the following description made by way of non limiting example with respect to the accompanying drawing which shows (on a scale of about one to fifty):
FIG. 1 two coils seen in cross section;
FIG. 2 a lining for mounting with non jointed coils with the aid of cross pieces.
This lining is constituted of a sheet of metal 1 shaped in such a way as to have in addition to a blade 2 in which are cut teeth a height flexible heel. The lateral entrance 3 is curved and has a dimension such as to receive therein with snap-fit or pinching the male part 4, which has a different curvature than the lateral entrance 3, of the heel of the next coil.
An edge 5 wedges in a narrowed section 6 outside the heel.
Nicks can be made in the heel to facilitate winding along a small radius.
In addition to low weights, this embodiment makes possible a complete hardening (teeth and heel), the use of alloyed steels which are difficult to laminate and the possibility of pinching the teeth after hardening owing to the thinness of the blade (about two tenths of a millimeter).
In a modification, the coils are connected by a cross piece or spacing elements 7 having at its entrance a housing able to fit with pinching or a snap-fit on the outside 1f heel 4; and, at the opposite end, a male section 9 which pinches itself within the heel of the following coil. This cross piece can be made of a profiled sheet or of a laminated wire or one obtained by extrusion.
It is evident that the invention is not limited to the example above described and shown from which there can be provided other shapes and other embodiments without thereby departing from the scope of the present invention.
What is claimed is:
1. A lining for carding rollers comprising: a plurality of coils, each having a toothed portion and a resilient heel portion; said toothed portions extending away from said resilient heel portion and having a plurality of teeth thereon; each said resilient heel portion including inner and outer holding means said inner holding means for receiving therein and holding thereto with a snap-fit the outer holding means of an alike and similarly orientated adjacent coil.
2. A lining according to claim 1; wherein said resilient heel portion has a curved cross-section; and wherein said toothed portion and said resilient heel portion are integral with each other.
3. A lining according to claim 1; wherein said resilient heel portion comprises a first curved surface and a second curved surface, said second curved surface having a different curvature than said first curved surface; and wherein said holding means includes said first curved surface and said outer holding means includes said second curved surface.
4. A lining for carding rollers comprising: a plurality of coils, each having a toothed portion and a resilient heel portion; said toothed portions extending away from said resilient heel portions and having a plurality of teeth thereon; each said resilient heel portion having first means insertable into a snap-fit engagement with an alike and similarly orientated coil, and having receiving means for holding thereto with a snap-fit said first means of another alike and similarly orientated coil.
5. A lining according to claim 4; wherein said resilient heel portion has a curved cross-section; and wherein said toothed portion and said resilient heel portion are integral with each other.
*6. A lining according to claim 4; wherein said resilient heel portion comprises a first curved surface and a second curved surface, having a smaller radius of curvature than said first curved surface; and wherein said first curved surface is shaped to receive therein the mating portion of said another alike and similarly orientated coil and said second curved surface is shaped to fit into the mating portion of said alike and similarly orientated coil.
7. A lining assembly for carding rollers comprising; a plurality of alike and similarly orientated separate coils each having a toothed portion and a resilient heel portion; each said toothed portion extending away from said resilient heel portion and having a plurality of teeth thereon; a plurality of spacing elements each having a male portion and a female portion and each positioned between two of said coils; each of said resilient heel portions including an inner holding means for receiving therein and holding thereto with a snap-fit the male portion of one of said spacing elements, and outer holding means for insertion into and in snap-fit engagement therewith the female portion of a different one of said spacing elements; whereby said lining assembly is held together by a plurality of snap-fits.
8. A lining assembly according to claim 7; wherein each of said resilient heel portions has a curved section which includes said inner and outer holding means; and wherein each of said female portions comprises a first curved section and each of said male portions comprises a second curved section, said first curved section having a different curvature than said second curved section.
References Cited FOREIGN PATENTS 720,210 12/1931 France. 854,090 11/1960 Great Britain.
DORSEY NEWTON, Primary Examiner