US2381983A - Drafting mechanism for textile - Google Patents

Description

Aug. 14, 1945. J. NOGQUERA E 2,381,983

DRAFTING MECHANISM FOR TEXTILE FIBERS Filed Nov. 20, 1942 2 Sheets-Shes: 1

INVENTOR. Jose 4]; .ll oyuera ATTORNEYS 1945- J. NOGUERA DRAFTING MECHANISM FOR TEXTILE FIBERS 2 Sheets-Sheet 2 Filed Nov. 20,1942

l6 INVENTOR.

Jose a ll "a guera Mala/ .&/ /d.

ATTORNEYS Patented Aug. l4, 1945 DRAFTING MECHANISM roe TEXTILE FIBERS Joseph Noguera, Manchester, England, assignor to Casablancas High Draft Company Limited, Manchester, England, a British company Application November'20, 1942, Serial No. 466,31d

In Great Britain October 27, 1941 8 Claims. (Cl. 19-.131)

This invention relates to drafting mechanisms for textile fibers of the type using endless belts engaging and guiding the fiber being drawn.

Two-belt draft mechanisms of this type usually comprise a pair of rollers each carrying an endless belt, between which belts the fiber passes,

and .a pair of front drafting rollers for drawing the fiber from between the belts. Tensor or guide members arranged parallel to the axes of the said first mentioned rollers and located near the nip of the front rollers, are disposed within the loops of the belts to guide the same and cause them to bear on the fiber with a suitable pressure.

The object of the present invention is to provide an improved mechanism of the above type which enables drafting to be carried out under morefavourable conditions than hitherto.

According to the present invention, the endless belts are so arranged with respect to the front drawing rollers that the flattened strand of fibers passes from between the endless belts and is delivered to the front drawing rollers in a plane at right angles to the line of contact of said drawing rollers, while the surfaces of said belts which are gripped between the belt driving rollers are in a plane at right angles to the plane in which the strand passes from between. the belts.

In this manner, the belts can be driven by positively driven rollers disposed lengthwise across the machine and capable of being coupled and driven as a singleroller in the usual way, while at the same time, the flattened strand of fibers is delivered to the front drawing rollers in a plane at right angles to the line of contact of said drawing rollers, whereby the more loosely held fibers at the edgesof the strand are squeezed towards the middle by the drawing rollers.

The invention will now be described with reference to the accompanying drawings in which:

Figures 1, 2 and 3 illustrate the preferred embodiment, Figures 1 and 2 being plan and side elevational views respectively while Figure 3 is a view similar to Figure 2 but showing in addition the front and back drawing rollers,

Figures 4 and 5 are side elevational and plan views respectively of another embodiment.

passes between the belt driving rollers 3 or 4 in a plane at right angles to the plane in which it passes from the back guiding members 6 to the front guiding members 5. Referring to Figure 3, the strand leaves the back drawing rollers l and 8 and is taken by the belts l and 2 in a plane at .right angles to the line of contact of said rollers,

while it is delivered to the front drawing rollers 9 and I0 in a plane at right angles to the line of contact of said drawing rollers.

In the embodiment illustrated in Figures and 5, the endless belts l and 2 are driven by the roll-- ers 3 and 4 which are disposed with their axes at right angles to the axes of the. tensor or guide members 5 whereby the belts are given a gradual to the belt driving rollers, but after leaving the latter they are relatively slack all the way until they reach the front again. Under certain conditions, it may be necessary .or advantageous to increase the grip of the belts on the textile fibers by pressing them together or by deflecting them from their straight path and various ways in which this may be done are illustrated in Figures 6 to 10 as applied to the embodiment described with reference to Figures 1, 2, and 3.

As illustrated in Figure 6, which is a plan vi w,

the back guiding members 6 are replaced by staggered members l3, I3, which have a hip or pincer effect on the belts.

As illustrated in Figure 7,-which is a plan view, three holes A, B and C are formed in the mechanism and so disposed that by; inserting pegs therein the belts may be deflected from their straight path. In the drawings, a peg is shown inserted in the hole A only. {These holes A, B

and C are formed in the flat plate which connects Figures 6 to 10 illustrate various means for in- Y creasing-the grip of the belts on the fibers as applied to the embodiment of Figures 1, 2 and 3.

Referring to Figures 1,' 2-and 3, each belt is in contact with the fibers while passing from the back guiding members 6 to the front guiding members 5, while in passing from the front guiding members 5 to the back guiding members 6, it

the two side plates of the usual cradle in'which the endless belts are mounted in a manner com-'- that the two star wheels mesh correctly. The

their axes parallel to the axes of the front and back drawing rollers.

ing members in one and the same 'plane, while said belts are in contact with said driving rollers while in a plane at right angles to the plane in which they ..pass between said back and front guiding members.

3. Drafting mechanism for textile fibers comprising front drawing rollers, endless belts for engaging and guiding said fibers and feeding 7 them to said front drawing rollers, front guiding trated the belt driving rollerslare disposed with What I claim and desire to secure 'by Letters Patent of the United States is:

l.'Drafting mechanism for textile fibers comprising front drawing rollers, endless belts for engaging and guiding said fibers and feeding them to said front drawing rollers, front guiding members for said endless belts arranged with their longitudinalaxes. a. right angles to. the line of contact of said front drawing rollers, whereby the flattened strand of fibers passes from between the endless belts and is delivered to the front drawing rollers in a plane at right angles to the line of contact of said drawing rollers, and driving rollers for said endless belts arranged withtheir longitudinal axes parallel to the line of contact of said front drawing rollers, whereby the surfaces of said belts which are gripped be tween said belt-driving rollers are in a plan at right angles to said first-mentioned plane.

2. Drafting mechanism for textile fibers comprising front drawing rollers, endlessbelts for engaging and guiding said fibers. and feeding them to said front drawing rollers, front guiding members for said endless belts arranged ,with their longitudinal axes at right angles to the line of contactof said-front drawing rollers, whereby the flattened strand offibers' is delivered to said front drawing rollers in a plane at right angles to the line of contact of saidfront drawing rollers, back guiding members for said endless belts arranged with their longitudinal axes at right angles to the line of contact of said front drawing members for said endless belts arranged with "their longitudinal axes at right angles to the line of contact of said front drawing rollers, whereby the flattened strand of fibers is delivered to the front drawing rollers in a plane at right angles to the lineof contact of said front drawing rollers, and driving rollers for said endless belts rollers, and driving rollers for said endless belts intermediate said front and back guiding members and with their longitudinal axes parallel to the line of contact of said front drawing rollers, whereby said belts-are 'in contactwith the fibers while passing between said back and front guidarranged; with their longitudinal axes parallel to the line of contact of said front drawing rollers, whereby in passing. between. said driving rollers and said front guiding members the belts are turned through 90.

4. Drafting mechanism according to claim 2, in which said back and front guiding members consist of pairs of fixed members, one member of each pair having a portion extending along the belt and pressing it into contact with the strand in a resilient manner.

5. Drafting mechanism according to claim 2, comprising in addition means for diverting the belts from the plane in which said belts pass between said back and front guiding members.

6. Drafting mechanism according to claim 1, comprising in addition means for diverting the belts from their straight path to increase their grip on the strand, saidmeans consisting of one or more pegs or the like which are inserted in holes formed in the machine and so disposed that the belts are deflected from their straight path.

'7. Drafting mechanism according to claim 2, in

' which said back guiding members consist of fixed members which exert a nip or pincer effect on the belts to increase their grip on the strand.

,8. Drafting mechanism according toclaim 1, comprising in addition .means for-diverting the belts from their straight path to increase their grip on the strand,- saidmeans consisting of two star wheels located one within' each belt and-so disposed with respect to each other and to the -belt that they exert a nip or pincer effect on said beltsto increase their gri on the} strand.

- JOSEPH NOGUERA.

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