US2204944A

US2204944A - Combing machine

Info

Publication number: US2204944A
Application number: US245635A
Authority: US
Inventors: Nasmith John William
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-01-05
Filing date: 1938-12-14
Publication date: 1940-06-18
Anticipated expiration: 1957-06-18

Description

June 18, 1940. w NASMlTH 2,204,944

CQMBING MACHINE Filed Dec. 14, 1938 1 22 V622 for:-

BJ lids fif/brnefff- Patented June 18, 1940 iCE chester,

England Application December 14, 1938, Serial No. 245,635 in Great Britain January 5, 1%8

4 Claims.

The invention relates to combing machines for textile fibres, such machines being of the rectilinear type.

In the specification of Letters Patent of the United States numbered 1,892,317 and 2,145,491- the references herein given are common to boththere are described and shown a pair of piecing rollers P and P, and a detaching roller D coacting with a usual combing cylinder segment, which in practice is covered with leather, to form a nip to detach a tuft of combed fibres and pass the same to an end of fleece returned by the piecing rollers for piecing.

In dealing with certain classes of fibre, and particularly oiled wool, the fibre tips tend by their nature to cling to the surface of the leather-covered segment of the combing cylinder, and thus to be carried round thereby until the fibre tips meet an end of fleece returned for the piecing operation, and such end does not always sweep all of them upwardly from the segment surface in piecing; but even when it does, the piecing is not so clean and neat as would be the case if the fleece were not depended upon for this func tion.

This will be appreciated from the sectional view shown in Figure l of the annexed drawing, which figure is inserted merely for the purpose of illustrating this explanation. Piecing rollers are shown at P, P; the detaching roller at D; the a usual top comb at C, with machine nipper jaws l, 2 which grip the fibre tuft N to be combed by the combing cylinder Y part of which consists of the leather covered segment S. Detaching roller D makes intermittent contact with the surface of this segment to co-act therewith for the drawing of the fibre tuft N through the top comb C the cylinder combing being finished and the nipper having opened to be pieced upon the end of already combed fleece T, returned by rollers P, P for the purpose. The best course for the fibre tuft towards the rollers P, P is that shown in broken lines; the course it tends to take in the circumstances mentioned, is that in which the tuft is shown in full lines upon the surface of the cylinder segment and this does not give the best piecing even if the fibres round the roller P succeed in lifting all the fibre tips from the leather covered segment S.

The object of this present invention is the provision of means whereby the lifting of all the fibre tips of the combed tuft from the cylinder segment will be assured, and to this end the invention consists in a resilient member which forms part of the combing cylinder segment which member is depressed by the descending detaching roller as the latter descends to grip the fibre tips of the tuft on commencement of detaching, such resilient member being released and rising with the fibre tips upon it, as the continuing rotation of the combing cylinder frees it from the pressure of the detaching roller.

The invention as carried out with simple and practical mechanical details will now be fully described for a full understanding of the same, reference being had to Figures 2, 3 and 4 of the drawing hereto annexed-Figure 1 being as stated merely illustrative and explanatory. Figure 2 is a sectional view of the device according to the invention at the point where detaching commences; Figure 3 is a similar view at a point just after commencement of such detaching operation, and Figure 4 illustrates a modified form of the resilient member of the previous figures.

Referring first to Figure 2, the piecing rollers v P and P are shown, as also the detaching roller D which is lowered on to the leather covering L of the combing cylinder segment S to form a detaching nip, for the tips of the fibre tuft N at the point shown, the combing cylinder rotating continuously in the direction of the arrow thereon. The forward edge of the usual cylinder segment is indicated by S and in the construction being described according to this invention the surface of the leather covering L of this cylinder segment S is prolonged by a fiap F of leather which is secured upon the block or support B extending across the whole width of the said segment. Leather is the most suitable material for the flap, as, a flat piece of the same being used to constitute such flap, by securing it at the forward end of the block or support at F and leaving the rear edge F free, a natural resiliency is imparted to such rear edge when depressed, round the arc of block B the flap being forced into the curved position shown in the fig- 40 ure. The roller D, being lowered, comes upon and depresses the edge F of the leather fiap F, a continuous leather surface being thus presented at commencement of detaching, as shown in the figure; The continuing rotation of the combing cylinder brings the rear edge F of the flap away from the nip of the roller D and the said edge, no longer depressed and constrained, rises, as seen in Figure 3, ensuring a positive lift to all the fibre tips of the tuft towards the piecing rollers and ensuring that no fibres shall be left adhering to the leather covering L to be picked up by the returned end of the fleece T. It is then immaterial whether the tips follow the dotted path shown in Figure 1 or pass direct to rollers P, P as shown by the arrow in Figure 3. On the next stroke or nip of the combing machine the still raised edge F of the flap F is again depressed by the detaching roller D, the movements being repeated.

Only a very small extent of lift of the edge F of the flap F is necessary, it being sufficient to allow for a lift of from one-sixteenth to oneeighth of an inch, to break the continuity of the leather surface constituted by the flap and the leather cover L of the cylinder segment S.

As stated, the leather fiap F is of sufficient resiliency to cause its edge F to rise when undepressed. To compensate for any loss of resiliency due to continuous working, however, it may have combined therewith in recesses at intervals along its length blades B of so-called doctor steel. The provision of these blades ensures prompt and certain lifting movement at the right instant.

In Figure 4, which is a fragmentary showing, the leather cover L of the cylinder segment S is as before, as also the leather F upon the block or support B. In this modification however the leather flap F is secured as a cover to the surface of the block or support B and compression springs B are provided along the width of the latter, which is pivoted at B the descent of the detaching roller D as described with reference to Figures 2 and 3 depressing B and causing the leather F, as before, to form a continuation of the leather cover L of the cylinder segment S.

I claim:

1. In a combing machine for textile fibres, such machines having a rotating combing cylinder and a segment, upon such cylinder, a detaching roller which makes intermittent contact with such segment to form a detaching nip for a tuft of fibres, a movable member forming part of such segment and providing a continuation of the surface of the same at commencement of the detaching of a tuft of fibres, and means for causing the rise of such movable member immediately after the detaching has commenced, with resultant lifting of the tips of the fibres from the arcuate plane of the cylinder segment, for the purpose set forth.

2. In a combing machine for textile fibres, such machine having a rotating combing cylinder and a leather-covered segment upon such cylinder, a detaching roller which makes intermittent contact with such segment to form a detaching nip for a tuft of fibres, and a resilient member forming part of such segment which resilient member is constrainable by the detaching roller at coinmencement of a detaching to form a continuation of the cylinder segment surface, and when freed from constraint by the rotation of the combing cylinder rises to break such continuity of surface.

3. In a combining machine for textile fibres, such machine having a rotating combing cylinder and a leather-covered segment upon such cylinder, a detaching roller which makes intermittent contact with such segment to form a detaching nip for a tuft of fibres, and a resilient leather fiap forming part of the cylinder segment which resilient leather flap is constrainable by the detaching roller at commencement of a detaching to form a continuation of the cylinder segment surface, and when freed from constraint by the rotation of the combing cylinder rises to break such continuity of surface.

4. In a combing machine for textile fibres, such machine having a rotating combing cylinder and a leather-covered segment upon such cylinder, a detaching roller which makes intermittent contact with such segment to form a detaching nip for a tuft of fibres, a pivoted resilient leathercovered member forming part of the cylinder segment, which pivoted resilient leather-covered member is constrainable by the detaching roller at commencement of a detaching to form a continuation of the cylinder segment surface, and

when freed from constraint by the rotation of the combing cylinder rises to break such continuity of surface.

JOHN WILLIAM NASMITH.