US1671878A - Manufacture of artificial threads and the like and apparatus therefor - Google Patents

Manufacture of artificial threads and the like and apparatus therefor Download PDF

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Publication number
US1671878A
US1671878A US209452A US20945227A US1671878A US 1671878 A US1671878 A US 1671878A US 209452 A US209452 A US 209452A US 20945227 A US20945227 A US 20945227A US 1671878 A US1671878 A US 1671878A
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US
United States
Prior art keywords
solution
jet
plunger
barrel
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US209452A
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English (en)
Inventor
Topham Charles Fred
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Akzo Nobel UK PLC
Original Assignee
Courtaulds PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Courtaulds PLC filed Critical Courtaulds PLC
Application granted granted Critical
Publication of US1671878A publication Critical patent/US1671878A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/04—Dry spinning methods

Definitions

  • This invention relates to the manufacture of artificial threads and the like, and reapparatus therefor, and is of particular value in the production of artificial threads by 5 projecting a solution of a thread-forming substance in a volatile solvent into a warm atmosphere.
  • the said increase of pressure may be produced for example by means of an auxiliary plunger moving in a barrel, or alternatively by means of a flexible diaphragm.
  • Figure 1 represents diagrammatically a method of carrying out this invention in which an auxiliary pump comprising a plunger moving in a barrel is used for the purpose of supplying the increased pressure, the figure also indicating the relation and connectioh of the said auxiliary pump with facilitated by applying to the sothe other parts of the apparatus.
  • Figure 2 1llustrates in vertical section, on an enlarged scale, the plunger and the barrel, and Figure 3 illustrates a modification in which the sudden increase ofcpressure is effected by means of a flexible diaphragm.
  • a pipe A conveys the spinning solution from the reservoir to 'a pump B and a supply pipe E conveys the spinning solut1on from the pum B which may be for example of the type escribed in either of the specifications of British Letters Patents Nos. 17876/1907 or 196791, or a toothed-wheel pump or any other suitable fornr of pump may be used which sup lies definite quantities of solution in definite periods of time, to a jet-C containing a plurality of fine holes, the said jet 0 bein situated at the top end of the spinningc amber D.
  • the supply pipe E at a point between the pump B and the jet C is rovided path a branch pipe F leading to a arrel G 1n which slides a plunger H, the said plunger H being actuated by a' lever J. It is preferred to place a tap K in the branch pipe F between the supp y pipe E and the arrel G, so as to prevent the spinning solution from being .forced into the barrel except at such times as it may be desired to make use of the plunger and barrel for starting the production
  • the tap K being open, the lever J is raised slowly, thereby lifting the lunger H, and the face of the jet G is wiped with a cloth moistened with acetone, or other suitable solvent in order to remove any solution from it.
  • the auxiliary plunger and barrel may be of such construction that the plunger fits the barrel from one end to the other end thereof. In this case, however, any cellulose acetate solution which may leak between the plunger andv the barrel will, on reaching the top end of the said plunger, lose more or less of its acetone by evaporation, and a film or layer of hard cellulose. acetate will thereupon be formed, tending to make the plunger diflicult to move.
  • the sudden increase of pressure may alternatively be effected by means of a flexible diaphragm which may be arranged in the supply pipe between the pump and the jet, or in a vessel connected by a branch pipe to the said supply pipe.
  • B represents the pump bev spun is forced through the pipe E leading to the jet.
  • 0 is a flexible diaphragm and by imparting a sudden pressure to a handle or knob 'P. the diaphragm and the solution imm'ediately below are forced downwards and the pressure is transmitted along the pipe E to the jet C.
  • the solution through the holes of the jet should be impeded or hindered means may therefore be provided as for example, a catch, which after the diaphragm has been pressed'downwards, is arranged to hold the handle or knob P securely in that position, until such time as it is desired to start the formation of the thread afresh, when the catch may be released, and the knob P and the diaphragm 0 be allowed to rise, the space below the diaphragm being again filled with spinning solution.
  • the diaphragm may be situated in a vessel, which is separated from the main pipe E by means of a small branch pipe, which branch pipe is furnished with a tap in a manner similar'to that illustrated at K in Figure 1.
  • any motion of the said plunger or of the flexible diaphragm should influence the rate of flow of the cellulose acetate solution through the jet, and for this reason, may be inserted between the supply pipe and the barrel in which the plunger moves, or between the supply pipe and the flexible diaphragm, or the tap may be dispensed with and other means be provided for securifig the plunger or the diaphragm in a fixed position.
  • a perforated jet and means for exerting pressure upon the solution to force it throughsaid jet, in combination with auxiliary means adapted to impart a sudden considerable increase of pressure to the solution passing through said jet.
  • auxiliary means comprising a pump adapted to impart a sudden considerable increase of pressure to the through sai of a thread-forming substance, a jet having a plurality of holes therein, and means for exerting pressure upon the solution to force it through said jet, in combination with an auxiliary pump adapted to impart a sudden increase of gressure to the solution passing jet, said auxiliary pumpcomprisin a plunger and a barrel provided with closab e holes for the introduction of a solvent, substantially as described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Prostheses (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
US209452A 1926-10-11 1927-07-30 Manufacture of artificial threads and the like and apparatus therefor Expired - Lifetime US1671878A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25285/26A GB278881A (en) 1926-10-11 1926-10-11 Improvements in and relating to the manufacture of artificial threads and the like, and apparatus therefor

Publications (1)

Publication Number Publication Date
US1671878A true US1671878A (en) 1928-05-29

Family

ID=10225225

Family Applications (1)

Application Number Title Priority Date Filing Date
US209452A Expired - Lifetime US1671878A (en) 1926-10-11 1927-07-30 Manufacture of artificial threads and the like and apparatus therefor

Country Status (5)

Country Link
US (1) US1671878A (en, 2012)
DE (1) DE458269C (en, 2012)
FR (1) FR639235A (en, 2012)
GB (1) GB278881A (en, 2012)
NL (1) NL20831C (en, 2012)

Also Published As

Publication number Publication date
DE458269C (de) 1928-04-04
NL20831C (en, 2012)
GB278881A (en) 1927-10-20
FR639235A (fr) 1928-06-16

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