US2932183A - Pressure sealing device - Google Patents

Pressure sealing device Download PDF

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Publication number
US2932183A
US2932183A US728461A US72846158A US2932183A US 2932183 A US2932183 A US 2932183A US 728461 A US728461 A US 728461A US 72846158 A US72846158 A US 72846158A US 2932183 A US2932183 A US 2932183A
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US
United States
Prior art keywords
tow
sealing device
sealing
passage
wall
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
US728461A
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English (en)
Inventor
James P Richeson
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.)
Solutia Inc
Original Assignee
Chemstrand Corp
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
Priority to NL238053D priority Critical patent/NL238053A/xx
Application filed by Chemstrand Corp filed Critical Chemstrand Corp
Priority to US728461A priority patent/US2932183A/en
Priority to CH7195059A priority patent/CH379685A/de
Priority to FR792049A priority patent/FR1220554A/fr
Priority to BE577677A priority patent/BE577677A/fr
Application granted granted Critical
Publication of US2932183A publication Critical patent/US2932183A/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
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0436—Supporting filaments or the like during their treatment while in continuous movement
    • D01D10/0472—Supporting filaments or the like during their treatment while in continuous movement the filaments being supported on endless bands
    • 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
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/02—Heat treatment

Definitions

  • This invention relates to a sealing device and more particularly to a sealing device which permits material to be continuously conveyed without leakage between adjacent regions characterized by a pressure differential.
  • the acrylic filaments are prone to fibrillatef or split off into fibrils when subjected to abrasion and in fabric form these ffibrils cause the fabric to assume a light color at the point of, abrasion, giving the illusion of wear.
  • a batch-type operation is employed in which then'iaterial is loaded into autoclaves or similar pressure vessels wherein it is subjected to a pressurized heating medium such as steam for an extended period of time While in a relaxed condition.
  • a pressurized heating medium such as steam
  • Such a batch-type annealing operation is time consuming and is generally expensive both from the standpoint of time and labor expended as well as the initial investment in the bulky apparatus required.
  • filamentary material is generally spun in continuous rope or tow form, it lends itself readily to a continuous type of anhealing operation.
  • a primary object of this invention is to provide a; new and novel device for eliminating leakage from a pressurized region through which'continuously moving material is conveyed,
  • Another object of this invention is to provide a new and novel sealing device for eliminating leakage from a pressurized chamber in the interior of which an annealing operation is to be carried out on a continuously moving tow of synthetic material.
  • a further object of this invention is to provide a new and novel sealing device which permits the movement .of a filamentary tow composed of synthetic material such p orated;
  • 'As generally illustrative of the 2 a s that formedfrom acrylonitrile polymers or the like through a pressurized region with substantially no attendant decrease in its pressure level.
  • invention further contemplates the provision of a new and novel apparatus for continuously moving a filamentary tow through a pressurized chamber with virtually no reduction in chamber pressure due to leakage at the points of entrance and exit.
  • a still further object of this invention is to provide a new and novel pressure sealing device which is simple in construction, inexpensive to manufacture, and which gives uninterrupted service over extended periods of time without the danger of breakdown.
  • a sealing device comprising a pair of sealing members which are arranged to be positioned within a region of high pressure such as the interior of a pressurized chamber, vessel, or the like. Means are provided for positioning portions of the sealing members in overlying relationship to form a passage for a continuously moving strip of material such as a filamentary tow or the like. Means are also provided for supporting the sealing members in their passage forming relationship on the inner surface of a Wall defining the high pressure region or chamber with the passage communicating with a material-admitting opening in the wall wherebya pressure differential is produced'between the passage and the high pressure region.
  • the passage of the sealing members yieldingly opens against the pressure in said high pressure region and intimately engages the tow passing therethrough so that leakage of pressure from the high pressure region "through the passage and wall opening is substantially eliminated.
  • Figure 1 is a side view, partially in section, of material advancing'apparatus with which the invention is incor-
  • Figure 2 is an exploded perspective view of a portion ofthe supporting means incorporated in the invention
  • Figure 3 is an enlarged end view of the invention in its operating position
  • FIG 4 is a plan view of the device of Figure'3.
  • a pressure sealing device constructed in accordance with the invention and designated generally by the numeral 11.
  • this device 11 is readily adaptable for handling material of any desired type, it is particularly adaptable for usewith a filamentary material of synthetic material such as that formed from acrylonitrile polymers or the like.
  • the sealing device 11 is used in conveying tow 12 between a'region of low or atmospheric pressure designated generally by the numeral 13, and a high pressure region designated 7 generally by the numeral 14.
  • the region 14 is preferably the interior of a pressure chamber or vessel (not shown) having a wall, a portion of which has been designated by the numeral 16.
  • This chamber is of a type which may be conveniently used to carry out an annealing operation on synthetic filamentary material such as wet spun acrylic tow in a manner to be explained hereinafter.
  • An example of an annealing chamber with which the sealing device of the instant invention may be satisfactorily employed is disclosed and claimed in the copending joint patent application of the present inventor and Robert C. Jackson, Serial No. 728,460, filed April 14, 1958.
  • the sealing device 11 comprises a pair of sealing members 17 which, in the preferred embodiment, are composed of a resilient or deformable material such as neoprene rubber or the like.
  • the sealing members 17 are preferably identical in construction and are of substantially planar shape in their natural or unstressed condition.
  • the positioning means include a pair of support frames, designated generally by the numeral 19, one of which is shown in Figure 2. It will be understood that the pair of support frames 19 are substantially identical in construction as are the sealing members 17 and for the purpose of clarity only one of such frames and sealing members will be described hereinafter.
  • the support frame 19, which is preferably rectangular in shape to define an open central space 21, comprises a pair of substantially parallel spacers 22, 23, at each of the corresponding ends of which are fixed an end bracket designated generally by the numeral 24.
  • spacer 23 is preferably of reduced height relative to spacer 22 in order to simplify the construction of the sealing device 11.
  • Each of the end brackets 24 comprises a bottom plate 26 and an upstanding, centrally arranged plate 27 which is suitably secured by means such as welding or the like to the ends of the spacers 22, 23.
  • the sealing members 17 are arranged in the overlying relationship of Figure 3 to form passage 18 and each of the members 17 are oppositely folded around the outer surfaces of the spacers 22, 23 on their associated support frame 19.
  • the sealing members 17 are maintained in the relationship of Figure 3 by suitably clamping the opposed bottom plates 26 of the end brackets 24 together by means such as bolts 28 or the like '( Figure 4).
  • the spacers 22, 23, or the end brackets bottom plates 26 are grooved or slotted in any suitable manner at their junction point so that a longitudinally extending clearance 29 is provided between the lower edge of spacers'22, 23, and the underside of the bottom plates 26.
  • the sealing member portions 17a are positioned adjacent the open space 21 of the support frames 19 in a relatively unrestrained condition so that they can flex freely being restrained only by the gripping action of the end brackets bottom plates 26 on the marginal portions of the sealing members.
  • the wall 16 which defines the interior 14 of the pressurized chamber, is provided with. a plurality of wall openings 30, three of such openings being employed in the embodiment illustrated, which are suitably dimensioned so as to accommodate the filamentary tow 12, and means have been provided for supporting the frames 19, together with the sealing members 17, on the inner .moves subsequently into surface of wall 16 with the passage 18 in communication with the wall opening 30 as shown in Figures 1, 3.
  • each of the spacer plates 22 is provided with a plurality of openings 31 for accommodating mounting bolts 32 which are inserted through openings 33 in the sealing members 17 and into suitably threaded recesses 34 in the wall 16 in order to secure the support frames 19 and one end of the sealing members 17 in the position of Figure 4.
  • mounting bolts 32 which are inserted through openings 33 in the sealing members 17 and into suitably threaded recesses 34 in the wall 16 in order to secure the support frames 19 and one end of the sealing members 17 in the position of Figure 4.
  • the opposite end portion of the sealing members is initially loose and, therefore, means have also been provided for securing this sealing member end portion on the outer surface of spacer plate 23.
  • openings 36 are provided in spacer plate 23 for accommodating bolts 37 which are inserted through openings 38 into longitudinally extending reinforcing bars 39 so that the sealing member end portion is sandwiched and fixedly held between the spacer plate 23 and the reinforcing bar 39.
  • any suitable seal such as an elastomeric plug or the like (not shown) is preferably positioned within each end of the V-shaped lateral opening 41 shown in Figure 3 formed by the sealing members 17 and the inner surface of wall 16 so as to prevent leakage of pressure from the chamber interior 14, past the sealing device 11 and through the wall opening 30.
  • the filamentary tow 12 may be continuously conveyed through wall opening 30 and the normally closed passage 18 of the sealing members 17 by any suitable means.
  • the tow l2 alone may be pulled or advanced through the sealing device 11 by any conventional tow advancing means and, in the specific embodiment, the tow advancing means includes a pair of continuous belts 42, 43, which are preferably formed of relatively thin material such as sheet steel or the like, and are sufficiently wide to be snugly accommodated within the passage 18 as shown in Figure 3.
  • the belts may be approximately 6 inches wide and are preferably between 0.005 and 0.030 inch in thickness so as to flex freely.
  • each belt is associated with a pair of rolls or pulleys which are positioned on opposite sides of the wall 16. More specifically, belt 42 is positioned on rolls 44, 46 rotatably mounted on shafts 47, 48, and belt 43 is positioned on rolls 49, 51, rotatably mounted on shafts 52, 53, respectively. Both of the rolls associated with each belt may be driven, if desired, but preferably only one is driven by any suitable means (not shown) and the driven rolls in each belt are suitably connected for simultaneous rotation so that the belts 42, 43 will travel at the same speed.
  • the belts 42, 43 are arranged to travel in the direction of arrow H and move together into the pressurized chamber interior 14 through the centermost wall opening 30. Each belt subsequently moves out of the chamber interior 14 through one of the remote wall openings 30 spaced along the wall 16 from the centermost opening.
  • a pressure sealing device 11 is also supported on wall 16 adjacent each of the remote openings 30, each of which accommodates one of the belts 42, 43 during its movement from the chamberinterior 14.
  • the tow .12 is fed to the nip of rolls 44, 49 so that it sandwiched relationship with belts 4g, 43 in a three-ply assembly.
  • This three-ply assembly is conveyed in the direction of arrow H into the chamber interior 14 through the normally closed passage 18 of the sealing device 11 which yieldingly opens as a result of the flexing action of the unrestrained sealing members portions 17a into the space 21.
  • the tow subsequently emerges from the belts as they separate adjacent the nip of the rolls 46, 51, and each belt returns to the exterior 13 through a similar sealing device 11 positioned adjacent each of the remote openings 30 as shown in Figure 1.
  • the apparatus of Figure 1 When the apparatus of Figure 1 is employed in the annealing of a filamentary tow composed of wet spun" acrylic filaments, it is desirable to subject this tow to steam under pressure (preferably steam at a temperature of between 135 to 155 C. and at a pressure of between 35 to 50 pounds per square inch) and the sealing device 11 is particularly adaptable for facilitating the conveying of such a tow into the chamber interior 14 which is supplied with pressurized steam in any suitable manner.
  • the tow is generally maintained in a relaxed or tension-free condition while in the region 14 by any suitable means in order to obtain the desired annealing action in which the molecular strains in the tow filaments are relieved.
  • the passage of the three-ply assembly consisting of the two belts 42, 43, and the tow 12 through the passage 18 of the centermost sealing device 11, forces the passage 18 to yieldingly open as shown in Figure 3;
  • the opposed surfaces of the relatively thin flexible belts 42, 43 move in close, confining relationship with the filaments in tow 12 with a minimum of free space there'- between and the yielding inner wall of passage 18 closely surrounds the outer surface of the belts.
  • the belt material and thickness is selected so as to permit the belts to flex sufliciently and fill any voids or valleys which might be present in the tow between the filaments.
  • the sealing device which enables material to be continuously conveyed between regions of high and low pressure while maintaining the high pressure region in a sealed condition.
  • the sealing device provided is of simple and inexpensive construction and is readily adaptable to not only many types of material conveying means such as belts, tubes, sheaths and the like, but also may be used for conveying the material alone through the high pressure region without affecting the efficient sealing action of the device.
  • the sealing device of the invention is particularly useful in the annealing or stream treatment of filamentary tow formed from a synthetic composition such as acrylonitrile polymers or the like, any suitable pressurized fluid may be satisfactorily handled by material conveying apparatus employing the sealing device of the invention.
  • the pressure regions 13, 14 may be at any pressure level as long as the region 14 in which the scaling device 11 is located is at a higher level than region 13. For instance, a vacuum might be imposed on region 13 with region 14 at atmospheric pressure.
  • a sealing device for passing a continuous length of elongated material between a high and a low pressure region having a wall therebetween comprising, in combination, an opening in said wall for admitting said material therethrough, a pair of substantially identical sheets of resilient material, a pair of substantially rectangular support frames defining a central space,'a pair of end brackets on each of said support frames, means on said end brackets for rigidly clamping said support frames in assembled relationship with said pair of sheets sandwiched therebetween whereby overlying portions of said sandwiched sheets are maintained in a relatively unrestrained contacting condition adjacent said central space and form a normally closed passage for said material, means for fixedly mounting said clamped support frames and said sandwiched sheets on said wall with said normally closed passage communicating with said wall opening whereby a pressure differential is produced between References Cited in the file of this patent UNITED STATES PATENTS Wilson Aug. 18, 1931 Tait Sept. 12, 1950 Blau Feb. 28, 1956 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTI
  • line 68 d of continuous filaments spread tow 12 which may be compose of synthetic material such as Signed and sealed this 11th day of October 1960.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Treatment Of Fiber Materials (AREA)
US728461A 1958-04-14 1958-04-14 Pressure sealing device Expired - Lifetime US2932183A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL238053D NL238053A (fr) 1958-04-14
US728461A US2932183A (en) 1958-04-14 1958-04-14 Pressure sealing device
CH7195059A CH379685A (de) 1958-04-14 1959-04-13 Abdichtungsvorrichtung zum kontinuierlichen Durchlass von Material durch eine Trennwand zwischen einer Hoch- und einer Niederdruckzone
FR792049A FR1220554A (fr) 1958-04-14 1959-04-14 Dispositif assurant l'étanchéité, entre deux zones à pressions différentes, au passage d'un objet de l'une dans l'autre
BE577677A BE577677A (fr) 1958-04-14 1959-04-14 Dispositif de fermeture étanche à la pression.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US728461A US2932183A (en) 1958-04-14 1958-04-14 Pressure sealing device

Publications (1)

Publication Number Publication Date
US2932183A true US2932183A (en) 1960-04-12

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Application Number Title Priority Date Filing Date
US728461A Expired - Lifetime US2932183A (en) 1958-04-14 1958-04-14 Pressure sealing device

Country Status (5)

Country Link
US (1) US2932183A (fr)
BE (1) BE577677A (fr)
CH (1) CH379685A (fr)
FR (1) FR1220554A (fr)
NL (1) NL238053A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302432A (en) * 1963-05-31 1967-02-07 Mather & Platt Ltd Seals for pressure vessels or the like
WO1981000221A1 (fr) * 1979-07-20 1981-02-05 American Cyanamid Co Procede pour creer une etancheite a la pression
US4787641A (en) * 1987-02-11 1988-11-29 Oy Tampella Ab Arrangement for sealing a chamber containing pressure medium
US5604995A (en) * 1993-02-01 1997-02-25 Valmet-Tampella Oy Wire seal for a drying space in a drying apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11155884B1 (en) 2020-10-16 2021-10-26 Klemm & Sohn Gmbh & Co. Kg Double-flowering dwarf Calibrachoa

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1819051A (en) * 1931-08-18 Geoege william sheaeee
US2522071A (en) * 1943-04-06 1950-09-12 Tait William Henry Valve structure for passage of strip material through the wall of liquid treatment baths
US2736632A (en) * 1954-02-09 1956-02-28 Blau Mfg Company Inc M Dry cleaning process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1819051A (en) * 1931-08-18 Geoege william sheaeee
US2522071A (en) * 1943-04-06 1950-09-12 Tait William Henry Valve structure for passage of strip material through the wall of liquid treatment baths
US2736632A (en) * 1954-02-09 1956-02-28 Blau Mfg Company Inc M Dry cleaning process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302432A (en) * 1963-05-31 1967-02-07 Mather & Platt Ltd Seals for pressure vessels or the like
US4296059A (en) * 1978-08-30 1981-10-20 American Cyanamid Company Pressure sealing process
WO1981000221A1 (fr) * 1979-07-20 1981-02-05 American Cyanamid Co Procede pour creer une etancheite a la pression
US4787641A (en) * 1987-02-11 1988-11-29 Oy Tampella Ab Arrangement for sealing a chamber containing pressure medium
US5604995A (en) * 1993-02-01 1997-02-25 Valmet-Tampella Oy Wire seal for a drying space in a drying apparatus

Also Published As

Publication number Publication date
FR1220554A (fr) 1960-05-25
BE577677A (fr) 1959-07-31
CH379685A (de) 1964-07-15
NL238053A (fr)

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