USRE20229E

USRE20229E - Spindle

Info

Publication number: USRE20229E
Authority: US
Priority date: 1933-10-26
Publication date: 1937-01-05
Also published as: US1972150A

Description

F. G. KRAFT Jan. 5, 1937.

SPINDLE Original Filed Oct. 26, 1933 2 Sheets-Sheet l A TTORNEY.

Jan. 5, 1937. F. G. KRAFT 20,229

1 SPINDLE Original Filed Oct. '26, 1953 2 Sheets-Sheet 2 I I E- v yjmj/g Mm Reicsued Jan. 5, 1937 PATENT OFFICE SFINDLE' Frederick G. Kraft, Richmond, Va., assignor, by

mesne ten to E. 1. du. Pont. de Nemours a Company, Wilmington, Del., a corpov ration of Delaware.

dated September 4,1934,

Serial No. 695,286, October 26, 1933. Appiicaj l V tionior reissue July 8-Claims.

This invention relates to the fluid treatment of materials. The invention also relates to sealing means. More specifically the invention relates to the treatment 01 thread by liquids under pressure. The invention particularly relates to an appa atus for treating rayon thread wound on bobbins with fluids under pressure and has speoifl'c embodiment in a bobbin and cooperating spindlehaving a sealing means operated by fluid ll-pressure. invention will be described with relation to the fluid treatment used in themanuiacture of rayon,,but it is: to be understoodthat it equal applicability to the fluid treatment of bobbin-carried thread of any kind. mtheimamiiactureof rayon by one, process the newly. coagulated thread is carried -on' bobbins. It'ia considered: desirable to treat these packages Iithoutremoving the thread in order to avoid I ,thethread. This is accomplished by i the thread with fluids under pressure on. bobbin. In the pressure treatment of artificial silk, according to'the method-mentioned in paragraph 2, the silk" is wound on perforated bobbins which are onwashing spindles by clamping or screwing compressible gaskets against the ends the bobbins. Fluids necessary to the treatment are thenforced through the spindle, the perfora tions oi'the bobbins and the thread. Difflculty i sf-experieneedwhen high pressure is used (that is; pressure of. 4050 pounds per squareinch) by neasmrof: leakage around, or blowing out of the mkets; a wasteful amormt of time is required toimeunt tthebobbinson and toremove them from a thespindles; thegeskets are subject to excessive wear and-frequent replacements; and-in cases wherethereis a-leaking, gasket, the washing must be stopped until the gask can be-replaced. Inthe ecpending application of' Paul Marie [.j Bierrttt, Serial No. 533,175, filed April 27, 1931, is disclosedsone apparatus which overcomes many or the difliculties above described. Experience 'has however, that when. water is first turnedon in the rack carrying the bobbins the pressure may beinsufllcientjto expand all of the and'great leakagemay occur around the Meta jnntil pressure has been built up. As a result," during 'thetime in which the pressure is being built up to that requisite to close all the gasketapwater may be sprayed past the gaskets alllover. the room. The tendency of e rubber lasketsto harden with age increases this fault 01' the Pierrat spindle. Furthermore, after the xarnhas been treated, it is sometimes difficult 18,1936, Serial No. 91,435

to remove a particular bobbin because a washer "r remains expanded.

An object of this invention is to provide a method and apparatus for the fluid treatment of thread carried on carriers or bobbins. Another object of the inventlonis to overcome the difliculties inherent in the Pierrat device. Another object of the invention consists in the construction: of a wash spindle which, by fiuidpressure, seals the ends of the bobbins and, by fluid pressure, releases the bobbin when the washing is complete. Astill further object of the invention consists in the manufacture of a new and. improved ty-pe of washing spindle. Other objects of theinvention will be in part apparent and in-part described elsewhere herein. I

The objects of the invention. are accomplished, generally speaking, by the use of a washing apparatushaving means, which are both collapsible and expansible, for. sealing the ends of the bobbin.

In thedrawings Figure l is a view partly. in section ofa washing apparatus made in accordance with the principles of my invention. Figure 2-is-a sectional view similar to Figure. 1. Figure 315:9, plan view of awash rack showing the pres.- sure and vacuum pumps. Figure 4 is a longitudinalsection through the sleeve portion of the apparatus. Figurefi is a cross section of the sleeve portion of the apparatus. Figure 6 are views showing, in section, the sealing ring.

Referring to. the numerals of the drawings, I is a pipe of a wash rack. In practice a number of these pipes. are mountedin vertical alinement. H is. a. vertical pipe forming the end pipe of a washingrack; I2 is a vacuum pump; I3 is a pressure pump; |2| is avalve; I3l is avalve; I22 is a pipe connecting the pumps to. the wash rack; 2.refers in general to a bobbin wound with thread.

When pressure less than atmospheric is wanted in the wash rack, the pump I3 is stopped, the valve l 3l'is closed, valve l2l is opened, and pump l2.ii s started. If it is desired to force a fluid into the rack, the valve l2l is closed, the vacuum pump is stopped, valve I3l is opened, and pump I3 is connected. to the proper fluid and. is started.

2| is a metal bobbin having perforations 22 and imperforate ends. In spinning, as is customary in this art, the thread is wound about the perfor ated part of the bobbin so as to overlap the imperforate ends.

3 is a wash spindle connected, as by a screw thread, to a, pipe I of the wash rack; 3| is a sleeve fitting over the spindle; 32 are annuli near the ends of the sleeve; 33 are holes in the sleeve leading from .the interior of the sleeve'to the annuli;

34 are annular shoulders in the sleeve designed to fit fluid-tight against shoulders 34! of the spindle and 342 of the end piece; 35 are holes through the sleeve to permit the passage of fluid from the interior to the outside of the sleeve; 36 is a rubber band fitting, in an annular depression provided therefor, over the holes 35; 3| l are grooves extending circumferentially of the sleeve; 3|! are grooves extending longitudinally of the sleeve and intersecting grooves 3| I; 31 is an end piece for the spindle having annular shoulder 342 capable of making a fluid-tight flt with shoulder 34 of the sleeve; 38 are flexible, ring-shaped tubes; 38I are tubular projections in the tubes of a size to approximately fit the holes 33 of the sleeve. The flexible annular tubes 38 are of a diameter in their normal condition slightly greater than the interior diameter of the bobbins which are to be treated on the spindle.

The apparatus functions as follows: The wash rack is assembled in a manner which will be understood by those acquainted with the art; the spindles are mounted on the'rack; the sleeves 3| are put into position on the spindles and are held by the end pieces 31; either before or after mounting the sleeves on the spindles the flexible tubes 38 are mounted in the annular depressions at the ends of the sleeves. The spindle is now in condition for operation. When all the spindles have been mounted on the rack, the air is partially exhausted within the system by turning on the suction pump; the rubber bands, which cover the holes 35 in the sleeve, act as a valve preventing the ingress of air; the flexible tubes 38 collapse, as shown in Figure 1, and the bobbins can be easily slid into place.

The vacuum pump is now stopped; the valve l2l is closed; and the valve |3l is opened. The pressure within the wash rack is now equalized and the tubes resume their normal shape. Being slightly larger than the interior diameter of the bobbin, they form a seal which prevents such fluid as may be forced into the spindle by the pump I 3 from lealnng past the ends of the bobbin. The pump I3 is now started and forces fluid, for instance wash water, through the pipe I22, rack ll, pipe I, and into the interior of the spindle. The spindle is provided with holes 33 through which the fluid is forced. The sleeve 3| is somewhat larger in its interior diameter than the portion of the spindle which it covers. As a consequence, the space between the spindle and the sleeve is filled with the fluid, which passes through hole 35, forces its way past the rubber band valve, and on through the holes of the bobbin and through the rayon or other thread which is carried on the bobbin. The fluid between the spindle and the sleeve also enters the holes 33 of the sleeve and fills the interior of the flexible tubes, as shown in Figure 2, forcing them very tightly against the bobbin and forming a pressure seal which continues so long as the fluid is forced through the thread. When the treatment is finished, and the bobbin is to be withdrawn, the pressure pump is cut off from the rack, the vacuum pump is turned on, the fluid within the rack is removed, and the rings are collapsed so that the bobbin can be removed without difllculty.

Many modifications of this invention are possible. For instance, the tube may be of rubber or of any other suitable flexible material. The fluid forced through the system may be any gas or any liquid. The material treated may be thread or any other pervious material which can be held on the surface of a bobbin when there is pressure within. The method of filling and exhausting the rack is shown for illustrative purposes only. Many other systems could be substituted for it.

An advantage of the invention is that a washing apparatus is provided which seals the ends of the thread carrier before pressure is turned on from within, preventing the escape of fluid past the sealing rings. Another advantage of the invention is that the apparatus can be easily dismantled and cleaned. Another advantage of the invention is in the saving of large quantities of treating fluids, compared to the Pierrat invention heretofore disclosed. Other advantages of the invention will be in part apparent and in part elsewhere herein described.

As many apparently widely different embodiments of this invention may be made without departing from the spirit and scope thereof, it is to be understood that I do not limit myself to the specific embodiments thereof except as defined in the appended claims.

I claim: r

1. In an apparatus for the fluid treatment of thread, a hollow perforated thread holder, a. hollow perforated spindle to carry the thread holder, means for reducing the pressure within the spindle to be below the pressure outside thespindle, means for forcing liquid under pressure through the thread holder, and means for sealing the ends of the thread holder comprising flexible tubes of slightly greater diameter than the interiordiameter of the thread holder encircling the spindle at points adjacent the thread holder ends, means connecting the interior of the tubes with the interior of the spindle whereby the tubes may be collapsed or put under interior pressure according to the pressure existing within the spindle, and a flexible rubber band covering the said perforations in the spindle to permit fluid to be forced through the thread holder but closing'the perforations of the spindle when the interior of the spindle is under reduced pressure.

2. In an apparatus for the fluid treatment of thread, a hollow perforated thread holder, a hollow perforated spindle to carry the thread holder, means for reducing the pressure within the spindle below the pressure outside the spindle, means for forcing liquid under pressure through the spindle and means for sealing the ends of the thread holder comprising flexible tubes of slightly greater diameter than the interior diameter of the thread holder encircling the spindle at points adjacent the thread holder ends, means connecting the interior of the tubes with the interior of the spindle whereby the interior pressure of the spindle will tend to change the size of the tube, and flexible means covering the said perforations in the spindle.

3. In an apparatus for the fluid treatment of thread, a hollow perforated thread holder, to

carry the thread holder a hollow spindle having perforations closed by a one-way valve which can be opened outwardly by pressure within the spindle, means for reducing the pressure within the spindle below the pressure outside the spindle,

4. In an apparatus for the fluid treatment of f thread on a perforated bobbin in which fluid is simultaneously passed through a fluid pressure expansible means for sealing the ends of said bobbin and to a conduit leading to the internal surface of said bobbin, means associated with said conduit for preventing the e of fluidexpansible means for sealing the ends of said bobbin and to a conduit leading to the internalsurface of said bobbin, yieldable means associated with said conduit for preventing the passage of fluid through said conduit until the said expansible means has been actuated.

6. In an apparatus for thefluid treatment of thread on a perforated bobbin in which fluid is simultaneously passed through a fluid-pressure expansible means for sealing the ends of said bobbin and to a conduit leading to the internal surface of said bobbin, a yieldable band associated with said conduit for preventing the passage of fluid through said conduit until thesaid expansible means has been actuated.

'7. In an apparatus for the fluid treatment of thread on a perforated bobbin in which fluid is simultaneously passed through a fluid pressure expansible means for sealing the ends of said bobbin and to a conduit leading to the internal surface of said bobbin, a rubber band associated with said conduit for preventing the passage of fluid through said conduit until the said expansible means has been actuated.

8. In an apparatus for the fluid treatment of thread, a hollow perforated thread holder, a hollow perforated spindle to carry the thread holder, means for forcing liquid under pressure through the thread holder, and means for sealing the ends of the thread holder comprising flexible tubes of slightly greater diameter than the interior diameter of the thread holder encircling the spindle at points adjacent the thread holder ends, means connecting the interior of the tubes with the interior of the spindle whereby the tubes may be put under interior pressure according to the pressure existing within the spindle, and a flexible rubber band covering the said perforations in the spindle to permit fluid to be forced through the thread holder but closing the perforations of the spindle when the interior of the spindle is under reduced pressure.

FREDERICK G. KRAF'I.