Intermittently bulked yarn

#The present invention relates to bulk yarn and the method and apparatus for manufacturing bulk yarn, and more particularly to an apparatus which utilizes opposed jets of air for bulking strands of multi-filament yarn.

#Heretofore, yarns have been curled or bulked by the use of mechanical apparatus which engages the yarn for bulking the yarn. It has also been known that jets of gas, such as air, may be utilized for imparting a bulking or curled effect to the yarn. These bulk yarns may be woven into fabrics and used for many different applications, such as in drapes.

#One example of a device for bulking yarn is disclosed in U.S. Pat. No. 3,823,541, granted to M. Buzano on July 16, 1964. This device discloses an apparatus for bulking yarn wherein a jet of air engages yarn passing through a passage for imparting bulk sections within the yarn. As disclosed in column 3 of the patent the process generally involves yarn speeds greater than 100 meters per minute preferably greater than 200 meters per minute.

#FIG. 1 is a perspective view illustrating an apparatus into which strands of multi-filament yarn are fed for producing a composite bulked yarn,

#FIG. 2 is a sectional view taken along line 2--2 of FIG. 1,

#FIG. 3 is a sectional view taken along line 3--3 of FIG. 1,

#Referring in more detail to FIG. 1 of the drawings there is illustrated a box defined by opposed side walls 10 and 12 which are joined by an end wall 14. Only one-half of the box is illustrated and the other half, not shown, is constructed in the same manner. A hinged top is provided for the box and has a compartment defined by walls 16 and 18 that are joined by end walls 20 and 22. Carried within a compartment defined by the walls of the top is sponge rubber 24 which absorbs noise. A handle 26 is provided on the front of the top for opening and closing such. As can be seen, the top is connected by a hinge 28 to a top wall 30 of the box. The top can be latched closed on the bottom of the box by means of any suitable latch, such as illustrated at 32 which cooperates with a fastener carried on the top portion (not shown).

#Positioned within the right hand end of the box as shown in FIG. 1, there are two elongated housings 34 and 36 through which strands 38a through 38d pass to be combined to produce a continuous bulk yarn. The strands may be of any type of material, and in one particular instance they are fiberglass and it is 75 denier with 816 filaments within each strand.

#The strands 38a through 38d pass through eyelets 40a through 40d carried within the side wall 12 and are fed into the housings 34 and 36. Only the operation of one of the housings will be described since both of the housings 34 and 36 are constructed in the identical manner. The housing 34 can be constructed of any suitable material, such as aluminum or stainless steel. The housing has an elongated longitudinal bore 42 extending therethrough. See FIG. 3. Positioned within this elongated bore is a sleeve 44 which has a large diameter bore 48 and a reduced diameter bore 46 therein. At the junction of the large diameter portion 48 and the reduced diameter portion 46 there is a tapered portion 50. A ceramic eyelet 52 is press-fitted within the entrance of the large diameter portion 48 for guiding the strands of multifilament yarn along the longitudinal axis of the bore. Another ceramic eyelet 54 is provided at the exit end of the elongated bore 56.