US1922718A

US1922718A - Manufacture of artificial filaments, threads, and the like

Info

Publication number: US1922718A
Application number: US476304A
Authority: US
Inventors: Tidmus Allan Hinds; Reeson Frank Alfred
Original assignee: Celanese Corp
Current assignee: Celanese Corp
Priority date: 1929-09-05
Filing date: 1930-08-19
Publication date: 1933-08-15
Anticipated expiration: 1950-08-15
Also published as: FR700712A

Description

1933- A. H. TIDMUS ET AL 1,922,718

MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, AND THE LIKE Filed Aug. 19, 1930 ALLAN H. TIBMUS FRANK A- REESDN INYENTOH f ow-M ATTOHNEW Patented Aug. 15, 1933 OFFICE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, AND THE LIKE Allan Hinds Tidmus and Frank Alfred Reason, Spcndon, near Derby, England, assignors to Celanese Corporation of America, a Corporation of Delaware Application August 19, 1930, Serial No. 476,304, and in Great Britain September 5, 1929 8 Claims.

This invention relates to apparatus for the manufacture of artificial silk and other artificial filaments, threads, ribbons, straw, or the like,

. (hereafter referred to as filaments), and is especially applicable to apparatus for the manufacture of such materials by the dry or evaporative method of spinning.

The object of the invention is to enable two jets or nozzles to be used in series on a single pipe or member for supplying spinning solution to the jets r nozzles.

Broadly, the invention comprises means by which one jet or nozzle can be secured to or removed from the supply pipe or member for the spinning solution without interfering with the attachment of the jet or nozzle to which the solution is fed directly from the supply pipe or member. The invention further comprises an entire jet or nozzle fitting consisting of a jet or nozzle fed directly by the supply pipe or member 2 and means for removably connecting a further jet or nozzle to the supply pipe or member in series with the first jet or nozzle.

The jet or nozzle (hereafterreferred to as the first jet) to which spinning solution is fed directly by the supply pipe or member may be formed integrally with or detachably or otherwise attached to the supply pipe or member. Conveniently it takes the form of a perforated metal 0 disc or cup which may be attached by a union or like engaging with the supply pipe or member or with a member attached thereto, or it may be soldered or brazed thereto.

The jet or nozzle (hereafter referred to as the second jet) in series with the first jet may be of any convenient form, as for instance a perforated metal disc or cup, and may be attached to the supply pipe or member in any convenient manner which permits of its being connected 0 without interfering with the first jet. For instance, the second jet may be attached to the supply pipe in front of the first jet by means of a union or like attachement which engages with the supply pipe or member (or with a member attached thereto), or with a union or like attachment holding the first jet. In cases where the first jet is attached by a screwed union or the like, it is preferred to employ one of the unions with a lefthand thread and the other with a right-hand 0 thread in order to facilitate removal of the second jet without removing the first jet. This form of attachment may be arranged to. be clamped over the securing means for the first jet.

The means for attaching the second jet to the supply pipe or member may be so arranged as to permit of the attachment without requiring any modification of the means usually employed for securing the first jet to the supply pipe or member; or the supply pipe or member, or the means for securing the first jet thereto, may be modified to receive the means for attaching the second jet. The second jet is preferably arranged to fit closely to the first jet, and the filtering of the spinning solution is preferably effected before the solution arrives at the first jet.

The mounting of a second jet in series with the first in such a manner that it can be'removed and replaced without interfering with the first jet enables the second jet to be removed without loss of pressure, wastage of spinning solution, or other inconveniences usually attendant upon removing the spinning jet. The first jet serves as a pressure retaining member after removal of the second jet and is formed with one or more holes of sufiicient total area to enable the second jet to receive an adequate supply of spinning solution. The total area of said hole or holes is preferably such that the pressure in the supply pipe or member remains approximately the same after removal of the second jet as when it is in use. For example, the first jet may be provided with a single hole of slightly greater area than the total area of the orifice or orifices of the second jet. The first jet may, however, serve as an additional filtering means for the spinning solution, in which case it may be provided with a number of holes not substantially greater than, and preferably considerably smaller than, the orifices in the second jet.

The apparatus may, moreover, be employed as a single means for changing the character of the product spun, either as regards the number of filaments extruded or their denier, or both, by allowing the first jet to be used as a spinning jet through which one or more relatively large filaments or a plurality of fine or very fine filaments are extruded, and then attaching a second jet to serve as a spinning jet for the extrusion of oneor more relatively large filaments or a plurality of fine or very fine filaments of different denier and/or number from those extruded through the first jet. Thus, the first jet may be arranged to spin a thread consisting of a number of fine or very fine filaments and by attaching a second jet, having a suitable number of spinning orifices which may be round, slitshaped or otherwise formed, the output may be changed to relatively few filaments of fairly high denier, or even to a single high denier filament.

Various forms of jet fittings and attachments according to the invention are illustrated in the accompanying drawing, but it is to be understood that these, together with the following description, are given by way of example only and are in no way limitative.

Fig. 1 is an elevation in half section of one form of jet fitting according to the invention, and Fig. 2 is a perspective view of part of the attachment by which the second. jet is secured to the first; and

Fig. 3 is a view similar to Fig. 1 of a second form of jet fitting.

Referring to Figs. 1 and 2, a pipe 11 for the supply of spinning solution to the jets is fitted with a hexagonal nut 12 having an enlarged externally threaded lower part 13, on to which a nut 14 is screwed to hold in place the first jet 15 against the under side of the nut 12. A split nut comprising two halves 1'7. 18 embraces the

nuts

12, 14, being shaped hexagonally inside at 19 to fit closely round the nut 12, having a depending skirt 20 to fit over the nut 14. The parts 1'7, 18 are shown apart in Fig. 2, which shows pins 21 on the opposed faces of the

parts

17, 18 arranged to fit into corresponding holes 22 to ensure that the

parts

17, 18 fit together correctly over the

nuts

12, 14. The skirt 20 is screw cut outside with a left-hand thread 23 and on to this skirt is screwed a further nut 24, having an annular horizontal bearing surface 25 inside, which clamps the

nut

17, 18 about the

nuts

12, 14 and holds a second jet 26 against the underface of the nut 19. The second jet 26 can be readily removed without interference withthe connection of the first jet 15, the nut l'7, 18 and the nut 24 being fittedtogether with a left-hand screw thread so that when the nut 24 is removed, there is no tendency for either of the

nuts

12, 14 to unscrew. The form of attachment for the jet 26 comprising the

nuts

17, 18 and 24 as just described enables the second jet 26 to be attached in series with the jet 15 without modification of the means employed to secure the jet 15 to the pipe 11.

In Fig. 3 a fitting is shown in which the jet 15 is held in position against the nut 12 by means of a nut 30, similar in function to the nut 14 but modified by having the lower part 31 of its exterior of reduced diameter, and provided with a left-hand screwed thread. On to this part 31 is screwed the nut 24, which holds the second jet 26 against the face of the nut 30. The nut 24 forming the attachment for the jet 26 has a lefthanded thread, so that its removal tends to tighten the nut 30 on to the member 13.

In both modifications shown-

suitable packing rings

16, 40 are used to make tight joints between the

jets

15, 26 and the body of the jet fittings or attachments.

Various forms of

jets

15, 26 are shown in the several forms of jet fitting illustrated in the drawing. In Fig. 1,, the second jet 26 has a large number of orifices 2'7 while the jet 15 has a single orifice 28 and serves as a pressure-retaining member during the replacement of the jet 28,

the area of the orifice 28 being slightly greater.

than the totalarea of the orifices 2'7. While the jet 26 is removed, the jet l5 continues to spin a single filament of comparatively large cross-section. In Fig. 3, both

jets

15, 26 have a number of

orifices

29, 33. i

It will be seen that any one of the jet fittings illustrated enables the jet 26 to be secured to or removed from the pipe 11 without disturbing the jet 15; and also that the output of the jet, either as regards number or size of the filaments spun can be readily varied, either by using

jets

15 and 26 having a different number and size of orifices and allowing the jet 15 to serve as the spinning jet while the jet 26 is absent, or by using the jet 15 as a pressure retaining member to reduce wastage during thechanging of one jet 26 for another having a different number and size of orifices.

What we claim and desire to secure by Letters Patent is?- 1. Apparatus for the manufacture of artificial filaments, comprising two communicating spaced spinning jets in series and means for securing said jets in series on a single source of supply of spinning solution, said securing means being adapted to facilitate the removal or replacement of the second of said jets without interfering with the attachment of the first.

2. Apparatus for the manufacture of artificial filaments, comprising two communicating spaced spinning jets in series, means for securing one of said jets to a source of supply of spinning solution, and an attachment adapted to be secured to said securing means and to secure the second jet'in series with the first.

Apparatus for the manufacture of artificial filaments, comprising two communicating spaced spinning jets in series, means for securing one of said jets to 'a source of supply of spinning solution, and an attachment adapted to be clamped to said securing means and to secure the second jet in series with the first.

4. Apparatus for the manufacture of artificial filaments, comprising two communicating spaced v spinning jets in series, means for securing one of said jets to a-source of supply of spinning solution, and an attachment adapted to be screwed to said securing means and to secure the second jet in series with the first.

5. Apparatus for the manufacture of artificial filaments, comprising two communicating spaced spinning jets in series, means for securing one of said jets by a screw thread to a source of supply of spinning solution, and an attachment adapted to be screwed to said securing means and to secure the second jet in series with the first, the

screw thread in said attachment being cut in reverse direction to the screw thread of the first jet securing means.

6. Attachment for application to a spinning jet, comprising a second spinning jet adapted to be fitted over the spinning jet to which it is applied and to leave a communicating space between the two jets, and means for securing said second jet to the first without interfering with the connection of the first to a source of supply of spinning solution. a

7. Attachment for application to a spinning jet, comprising a second spinning jet-adapted to be fitted over the spinning jet to which it is applied and to leave a communicating space between the two jets, and means for clamping said second jet to the first without interfering with the connection of the first to a source of supply of spinning solution.

8. Attachment for application to a spinning jet, comprising a second spinning jet adapted to be fitted over the spinning jet to which it is applied and to leave a communicating space between the two jets, and means for screwing said second jet to the first without interfering with the connection of the first to a source of supply of spinning solution.

ALLAN HINDS TIDMUS. FRANK ALFRED REESON.