US1980468A

US1980468A - Process and apparatus for the manufacture of artificial filaments

Info

Publication number: US1980468A
Application number: US604250A
Authority: US
Inventors: Brauer Erich
Original assignee: North American Rayon Corp
Current assignee: North American Rayon Corp
Priority date: 1931-04-25
Filing date: 1932-04-09
Publication date: 1934-11-13
Anticipated expiration: 1951-11-13

Description

Nov. 13, 1934.

E. BRAUER 1,980,468 PROCESS AND APPARATUS FOR THE MANUFACTURE OF ARTIFICIAL FILAMENTS [rick Braver Filed April 9, 1932 Patented Nov. 13, 1934 PATENT OFFICE UNITED STATES PROCESS AND APPARATUS FOR THE MANU- FACTURE OF ARTIFICIAL FILAMENTS I Application April 9, 1932, Serial No. 604,250

, In Germany April 25, 1931 5 Claims.

In the manufacture of artificial filaments by the so-called spooling or rolling processes, it has been found that uneven shrinkage results when the wet filaments are wound directly upon the 5 ordinary spools. For example, the innermost filaments of. the thread body built up upon the spools do not have sufiicient room within which to shrink, and thus do not obtain such an even shrinkage as the outer layers. Various expedients concerning collapsible spools, etc., have been resorted to, but some unevenness has remained in the shrinkage of the filaments.

It is in order to overcome this fault in the known methods that I have developed the present invention. I

One object of the present invention, therefore, is to provide a means whereby unevenness in the shrinkage of wound filaments is practically eliminated.

Another object of this invention is to provide a means whereby the shrinkage may take place unhampered from the time of the beginning of the winding.

Other objects will become apparent from a study of the following specification and of the accompanying drawing, in which:

Figure 1 is an end cross-sectional view through my new spool taken on the line 1-1 of Figure 2 part being shown in elevation and Figure 2 is a side elevational view, partly broken away, of the same.

In the collapsible spools so far devised, the spool or roller surfaces are fixed in circumference, and this is only altered after the filaments have been wound thereupon. In my new device, however, shrinkage is possible since the circumference is changeable from the moment that the winding starts. In other words, the circumference of my new spool is adapted to decrease in size from the time the winding starts.

Referring now to the drawing, the surface of the perforated spinning spool 1 is provided with a series (here four) of

uniform slots

2, 3, 4 and 5 rurming in a direction longitudinal to the spool, and extending from within the rim 6 to within the rim '7, of the spool 1. T-shaped supporting

bars

8, 9, 10 and 11 are adapted to project through these slots. They'enlarge the normal circumference of the spool and are elastically or springingly supported by the inner portion of the spool in such a way that the springing action is efiected at any time that any filaments, wound thereon, shrink. Therefore, the giving of the surface occurs also during the spinning of the filaments.

55 The spool shell 1 with the T-shaped supports surrounds the spool holder 12. This spool holder 12 is grooved at 15 and 16, and rubber supporting rings 17 and 18 are placed therein. As these

grooves

15 and 16 and the rubber supporting rings 17 and 13 run circumferentially of the holder, the T-shaped bars are yieldingly supported thereon, at the

positions

19, 20. 21 and 22.

In order that the springing effect may be effectuated properly I provide the grooves 15 and.

16 so that clearances below the rubber rings are 35 provided. These clearances are formed by

grooves

23, 24, 25 and 26 which-run longitudinally on the spool holder 12. These grooves also act as positioning and guiding means for the T-

shaped bars

8, 9, 10 and 11. At 27 are indicated bores which facilitate the handling of the spool holder during the process of manufacture.

After the elastic support of the bars in this manner has been made during the winding of the filaments, the spool is slid off of the spool holder for the washing and other after-treatment of the filaments. The T-bars may, if it is desirable, be removed from the spool for further use. The yarn then rests very loosely upon the perforated spools, and may be washed, after-treated, and, 30 if desired, dried while thereon. Because considerable shrinkage occurs during the winding, as stated above, and the removal of the T-shaped bars provides an appreciable loosening of the cira plurality of T-shaped bars adapted to fit within and extend through said slots and means for resiliently holding said barsextending through said slots, said means comprising a spool holder grooved circumferentially at a plurality of positions to a depth exceeding that required in order to hold a resilient ring, and resilient rings within said grooves. I

2. In a spool, in combination, a perforated cylindrical portion provided with a plurality of slots, said slots running longitudinally of the cylinder, a plurality of T-shaped bars adapted to fit within and extend through said slots, and means for resiliently holding said bars extending through said slots, said means comprising a. spool holder grooved circumferentially at a plurality of positions to a depth exceeding that required in order to hold ,a resilient ring, resilient rings adapted to be held within said grooves.

3. In a spool, in combination, a perforated cylindrical portion provided with a plurality of slots, said slots running longitudinally of the cylinder, a plurality of T-shaped bars adapted tofit within and extend through said slots, and means for resiliently holding said bars extending through said slots,'said means comprising a spool holder grooved circumferentially at a plurality of positions to a depth exceeding that required in order to hold a resilient ring, resilient rings adapted to be held within said grooves so that the said rings press against the'said T-shaped bars. a

' 4. In a spool, in combination, a perforated cylindrical portion provided with a plurality of slots,

said slots running longitudinally of the cylinder,

a plurality of T-shaped bars adapted to fit within and extend through said slots, and means for resiliently holding said bars extending through said slots, said means comprising a spool holder grooved circumferentiallyat a plurality of positions to a depth exceeding that required in order to hold a resilient ring, resilient rings adapted to be held within said grooves so that the said rings press against the said T-shaped bars to hold them in position through said first mentioned longitudinal slots in said spools.

5. In a spool, in combination, a perforated cylindrical portion provided with a plurality of slots, said slots running longitudinally of the cylinder, a plurality of T-shaped bars adapted to fit within and extend through said slots, and means comprising a spool holder for resiliently holding said bars in position in said slots, said spool holder being grooved circumferentially at a plurality of positions, and having resilient rings within said grooves.

ERICH BRAUER.