US2901778A - Comb for textile machine - Google Patents

Description

Sept. 1, 1959 J. M. J. SAUVAGE COMB FOR TEXTILE MACHINE 2 SheetS -Sheet 1 Filed July 20, 1953 Fig.2.

Sept. 1, 1959 Filed July 2o,' 1953 2 Sheets-Sheet 2 Fig.4.

United States Patent COMB FOR TEXTILE MACHINE Joseph Marie Julien Sauvage, Herstal, near Liege, Belgium Application July 20, 1953, Serial No. 369,185

Claims priority, application Belgium August 2, 1952 1 Claim. (Cl. 19--129) In textile machines for the preparation of fibers, there are utilized toothed bars or combs, also known as gills, consisting of plates provided with pins or needles which serve to parallelize or disentangle the fibers under treatment.

The invention has for its main object to provide improved combs of this kind having all the difierent qualities needed, viz. lightness, maximum resistance to corrosion, resistance to wear and cost of manufacture.

According to the invention, the plate or body of the comb is made in part of plastic material, for example a vinylic product, nylon, hard rubber, Bakelite, ebonite or galalith, or again a mixture or agglomerate of two or more of these materials.

In the conventional method of manufacture, the ends of the comb plates had to be treated by hardening, casehardening or the like, in order to reduce the wear in operation. Because of this hardening, the fragility of the ends of the combs was proportionally increased. The invention suppresses that disadvantage because the wear, already reduced by the light-weight construction, can be made good by the supply of plastic material cast over the ends of the comb plates. The forces necessary for movement of the combs being considerably reduced by reason of the load being of light plastic material, there will result automatically a reduction of the wear on the cams in intermittent contact with the ends of the combs, as well as on the worms and other driving gear.

From the foregoing, it will be seen that the invention is applicable to the manufacture and reconditioning of metallic combs and of combs damaged by wear at their ends, by applying plastic material only upon the ends of metallic comb plates or bodies. When it is desired to provide the ends or the worn extremities of a metallic comb plate with the plastic material in the form of a coating, these ends or extremities of the plate are first subjected to suitable machining or other preparation. This machining has for its purpose to provide metallic projections secured to the metallic comb plate or body, such projections being sunk and embedded in the plastic material thereafter applied to the plate.

In accordance with the present invention, it is proposed to remove the bar or comb ends completely, and only to use the bodies thereof, which will be completed by the addition of a small metallic plate of treated steel, which will be made fast with the framework of the body of the comb, by means of the process to which the present application relates.

The two elements of the comb (metallic body and ends) will be made fast to each other by means of notches of appropriate shapes, provided at determined points, both on the body of the comb and on the metallic parts of the added ends; this will be maintained by the casting of the plastic material, which will cover the metallic parts previously united by means of the notches.

The uniting of the metallic parts is efiected in the cold state by precise machining of the various parts in conice tact; this cold machining renders it possible for the added metallic plate to retain all its technical characteristics, the said plate being cut from strips of spring steel. This material has been chosen judiciously for resistance to shocks and warping to which the ends of bars are subjected, their various translational movements being effected with the aid of endless screws, in which the extremities of the combs engage when placed in the operative position.

When the machining is effected, the casting of the plastic material takes place, and the slight temperature necessary for the casting of the plastic material under pressure, intended to impart the appropriate shape to the comb ends, will in no wise impair the various technical qualities required of the ends of the combs.

It is apparent that the initial anchoring of the ends and bodies of the bars could be efiected by any known means of electrical or other welding, or by bezeltype arrangements, riveting, etc.

In order to explain the invention more clearly, the accompanying drawings represent by Way of example and not of limitation some embodiments of the said invention; in these drawings- Fig. 1 shows one end of a metallic comb plate having the extremity coated with cast material.

Fig. 2 shows partly in vertical section, one end of a metallic comb plate having recesses and metallic projections, the recesses serving to receive the plastic material and the projections becoming embedded in the plastic material.

Fig. 3 is a part sectional View, analogous with Fig. 2, of another embodiment of the invention.

Fig. 4 represents in perspective, one end of a metallic comb plate.

Fig. 5 represents in perspective, a metallic plate made fast with the metallic frame work of the body of the comb.

Fig. 6 represents in perspective the completed comb, the plastic material ensuring the desired external form.

In Fig. 1, numeral 14 represents a portion of a metal comb plate, one end 15 of which is machined to a desired shape, to define anchoring means comprising for example a hole 17 and notches 18, the end 15 so shaped being embedded in a body or mass 16 formed by a coating of plastic material, during the casting of the latter.

In Fig. 2, the end 15a of a metallic comb plate 14a, also having anchoring means comprising notches 18a and a hole drilled at 17a, is provided with metallic projections in the form of screw heads 19, the screw shanks being engaged in the comb plate. The assembled metallic parts are then embedded in the plastic mass 16a during the casting of the latter in a mold.

Fig. 3 represents a modification of Fig. 2, in which the end 15b of the metallic comb plate 14b, is provided with anchoring means in the form of pegs or pins 20, besides the holes 17b and the screw heads 19. All these projecting metallic anchoring parts, including the pegs 20, will be embedded in the mass of plastic material 16b used for the casting.

In accordance with the invention, and when the object is to re-cover the ends of a metal comb, only the body of the comb, provided with needles or pins 3, is retained, the ends are removed flush with the profile member, which may or may not be immersed in the plastic material.

In Fig. 5, the ends of the body 14c are then worked so as to provide them with small notches 21 which will render possible the engagement of the new metal comb end plate 22, which is also provided with notches 22a and 22b, inside the profile member of the body of the comb.

When the body of the comb 14c and the added end 3 plates 22' have been connected, the plastic material 160 will be cast all around the assembly, and will cover the assembled parts; this plastic material 16c will then keep the two metallic parts 22 and 140 in permanent contact,

and as a result of the casting under pressure, it will bring 5 about the desired outer configuration, while retaining the desired. and necessary elasticity of the end of the comb.

Figure 6 shows the completed comb, the plastic material 16c ensuring the desired external form, which it would have been impossible to impart to a metallic addition while maintaining in it the elasticity ensuring the longevity of the renovated comb.

Many difierent embodiments of this metal-plastic combination can be obtained with a view to reinforcing the extremities of the plates or bars forming the comb bodies; it is evident that these combinations are likewise within the spirit of the invention, as defined by the appended claim.

What I claim is:

A comb for textile machines comprising a needle-bearing metallic body having opposite extremities, end metal- 4 lic plates rigidly connected with said body at the extremities thereof, and a plastic coating at said extremities covering at least said end plates and of a predetermined configuration adapted for the mounting of the comb, said plastic coating being adapted to absorb shock and eliminate lubrication requirements.

References Cited in the file of this patent UNITED STATES PATENTS 297,794 Hall 1 Apr. 29,1884 1,582,110 Winter Apr. 27, 1926 1,654,105 Uzmann Dec. 27, 1927 2,577,466 Jones Dec. 4, 1951 2,648,874 Longstreet Aug. 18, 1953 FOREIGN PATENTS 509,443 Belgium Mar. 15, 1952 509,988 Belgium Mar. 31, 1952 565,796 Great Britain Nov. 28, 1944 695,985 Germany Sept. 7, 1940

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