US2721371A - Packaging of yarns and filaments - Google Patents
Packaging of yarns and filaments Download PDFInfo
- Publication number
- US2721371A US2721371A US329702A US32970253A US2721371A US 2721371 A US2721371 A US 2721371A US 329702 A US329702 A US 329702A US 32970253 A US32970253 A US 32970253A US 2721371 A US2721371 A US 2721371A
- Authority
- US
- United States
- Prior art keywords
- container
- yarn
- jets
- tow
- guide
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/76—Depositing materials in cans or receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/76—Depositing materials in cans or receptacles
- B65H54/80—Apparatus in which the depositing device or the receptacle is rotated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
- B65H2701/313—Synthetic polymer threads
- B65H2701/3132—Synthetic polymer threads extruded from spinnerets
Description
Oct. 25, 1955 J. HODKINSON ET AL 2,721,371
PACKAGING OF YARNS AND FILAMENTS Filed Jan. 5, 1955 N VE N TORSI l -i John hodkinsonfy Robe/f Li os m6, Y
5 AT TORNE Y6.
United States Patent PACKAGING OF YARNS AND FILAMENT S John Hodkinson, Cleveleys, near Blackpool, and Robert Lipscomb, Little Eccleston, near Preston, England, assignors to Imperial Chemical Industries Limited, a corporation of Great Britain Application January 5, 1953, Serial No. 329,702 Claims priority, application Great Britain February 1, 1952 7 Claims. (Cl. 2821) This invention relates to an improved process for packing yarns and filaments into containers.
In the manufacture of artificial yarns and filaments, difiiculty is often experienced in packaging, particularly when a heavy yarn or bundle of filaments is fed to the collecting device at high speed, e. g. as it comes from a spinneret. The winding of such yarns for example onto reels involves the use of large and heavy reels which are not easy to handle quickly so that there is considerable waste when dofiing. While it has been found possible to pack the yarn into an open container, difficulty has been experienced in the removal of the yarn from such a container.
We have found that it is possible to pack yarns and bundles of filaments (hereinafter referred to as tows) into containers at high speeds, e. g. by directing the yarn or tow into the container by means of a stream of gas or vapour, speeds greater than 1500 feet per minute can be attained; but if the yarn or tow follows a straight path it is projected into the container with such force that it often penetrates below the top layers already in the container. This causes tangles when the yarn or tows are drawn out of the container.
According to the present invention we provide a process for packaging yarns or tows which comprises projecting the yarn or tow into a container, via a guide, and subjecting the yarn or tow after it leaves the guide to one or more cross currents of gas or vapour which impinge upon the yarn or tow intermittently.
The effect of the intermittent cross currents of gas or vapour is to set up a wave movement in the yarn or tow which causes folding during packing. Such a package can be unwound without difficulty.
Our invention also includes an apparatus for use in the packaging of yarn or tow comprising a guide, a container, at least one gas or vapour jet positioned between the guide and the container, and means for controlling the gas or vapour stream coming from the jet to provide an intermittent flow across the line of travel of the yarn or tow, between the guide and container.
In a preferred embodiment of the invention the guide is a tube through which the yarn or tow is fed, entrained in a stream of gas or vapour.
Any number of jets may be used to supply the cross currents of gas or vapour. When there are more than one they may conveniently be arranged symmetrically around the line of feed of the yarn or filaments. Thus if two jets are used they may be diametrically opposed, three jets set at 120 intervals and 4 jets at 90 intervals.
Intermittent flow may be effected by any known means. For example, a valve may be incorporated in the feed line for the gas or vapour coming to the jets. If only one jet is used, this valve may cut off the flow completely at intervals; if however more than one jet is used, the valve may serve to direct the gas or vapour to each of the jets in turn, according to some pre-arranged cycle.
In a preferred and simple method of operation, con- 2,721,371 Patented Oct. 25, 1955 trol of the air jets is effected by a shutter which passes intermittently between the jet and the yarn or filaments. This method of control is preferred because it provides an instantaneous cut-off. The shutter may be in the form of a rotating cylinder surrounding the yarn or filaments, and having slots in the cylinder wall. As the cylinder rotates, the blank spaces between the slots cut off a stream of gas or vapour directed across the line of travel of the yarn or filaments. The rotary shutter can be designed to operate with any number of jets. For example, using two jets each operating continually and diametrically opposed, the yarn or filaments can be subjected to alternating blasts in opposite directions by using a cylinder which has an odd number of symmetrically positioned slots.
Methods by which the rotary shutter may be driven are many and various. A drive may be taken from any convenient moving part of the machinery or a small individual electric motor may be used. As a stream of gas or vapour is already available near the apparatus, a system of vanes on which a blast of gas or vapour impinges provides a cheap and simple method of rotation. These vanes may be so designed as to allow one stream of gas or vapour to provide the cross currents and to cause rotation.
In another modification of the present invention the direction from which the intermittent currents of air are directed may be varied by mounting the jets so that they can move round the line of travel of the yarn or filaments. Such a modification. permits of a great degree of variety in the manner in which the yarn or filaments are laid in the container.
The gas or vapour used in this invention will usually be air since supplies of air under pressure are easily and cheaply obtained.
The attached drawings illustrate but do not limit the scope of our invention.
Figure 1 is a diagrammatic sketch showing the general idea of the invention.
Figure 2 is a similar drawing showing the preferred embodiment wherein the yarn or tow is fed down a tube.
Figure 3 is a drawing of a preferred method of obtaining intermittent transverse jets of gas or vapour.
In Fig. 1 the tow 1 passes through a guide 2 and is then subjected to an intermittent air blast from the jet 3 causing it to follow a sinuous path 4 before it enters the collecting can 5.
In Fig. 2 the tow 1 passes down the tube 6 in a stream of air entering at 7. The jets 3 are fed with air from the inlet tube 8 via a two-way cock 9. The cock 9 is turned by a driven pulley 10 to provide alternate streams of gas to the jets 3. After passing through the jets the tow follows a sinuous path 4 into the can 5.
Fig. 3 shows in more detail a tow leaving a feed tube 6 in sinuous form as a result of traverse cross currents of air issuing alternatively from the jets 3 and 3 fed by the inlet pipe 8. The jets are made to impinge upon the tow alternatively by means of the cylindrical shutter 11 rotated by means of vanes 12 against which a stream of air is blown down the pipe 13. The slots in the shutter are so arranged that the jets of 3 are blocked while the jet 3 is open and vice versa. The shutter 11 rotates on a bearing mounted on the tube 6, not shown in the drawing.
It will be appreciated that the shutter may be rotated by means other than that illustrated. For example a small electric motor may be used.
In the packing of a yarn or tow into a container it is usual to cause guiding means bringing the yarn or tow to the container to follow a simple repetitive pattern, such as a clover leaf, to prevent uneven build up in the container. The present invention may be operated successfully in conjunction with such a movement. For example when the yarn or tow is fed in an air stream down a moving tube the apparatus of this invention may be easily mounted on the end of the tube so that it moves with the tube. One simple means of moving the tube is a pantograph mechanism. Alternatively the container itself may be moved during filling to prevent build up and also, if desired, vibrated to assist the settling of the yarn or tow.
The present invention is particularly applicable to the packaging of heavy tows made up of filament forming material, for example, nylon or highly polymeric polymethylene terephthalates such as polyethylene terephalate. Tows of these materials are used in the manufacture of staple fibre. Prior to this invention the packaging of these heavy tows, sometimes of 100,000 denier, has provided great difiiculty.
What we claim is:
1. Apparatus for packing elongated yarn-like material comprising a container, a guide for said material directed toward said container, a jet disposed between said guide and said container and directed across the material path, means for conducting pressure gas to said jet, and a shutter arranged to pass intermittently between said jet and the material path.
2. Apparatus according to claim 1, wherein said shutter is a slotted cylinder rotatably mounted with its axis coincident with the material path.
3. Apparatus according to claim 2, including air blast means for etfecting rotation of said shutter.
4. Apparatus according to claim 1, wherein said material guide is tubular, and said shutter is rotatably mounted on said tubular guide.
5. Apparatus according to claim 1, wherein said material guide is tubular and includes means for entraining the material passing therethrough in a gas stream.
6. Apparatus for packing elongated yarn-like material comprising a container, a guide for said material directed toward said container, a plurality of angularly spaced jets disposed between said guide and said container and directed across the material path, means for conducting pressure gas to said jets, and a shutter arranged to pass intermittently between said jets and the material path.
7. Apparatus for packing elongated yarn-like material comprising a container, a guide for said material directed toward said container, a plurality of symmetrically arranged jets disposed between said guide and said container and directed across the material path, means for conducting pressure gas to said jets, and a shutter arranged to pass intermittently between said jets and the material path.
References Cited inthe file of this patent UNITED STATES PATENTS 1,353,613 Renton Sept. 21, 1920 1,653,311 Rice et al Dec. 20, 1927 1,710,817 Fliedner Apr. 30, 1929 1,858,945 Thierfelder May 17, 1932 1,915,451 Schur June 27, 1933 2,115,423 Korver Apr. 26, 1938 2,190,597 Dritz Feb. 13, 1940 2,242,988 Averns May 20, 1941 2,304,260 Keller Dec. 8, 1942 2,333,267 Modigiliani Nov. 2, 1943 2,347,046 Geiger Apr. 18, 1944 2,393,243 Franz Jan. 22, 1946 2,447,982 Koster Aug. 24, 1948 FOREIGN PATENTS 525,283 Great Britain Aug. 26, 1940 830,773 France May 23, 1938
Claims (1)
1. APPARATUS FOR PACKINIG ELONGATED YARN-LIKE MATERIAL COMPRISING A CONTAINER, A GUIDE FOR SAID MATERIAL DIRECTED TOWARD SAID CONTAINER, A JET DISPOSED BETWEEN SAID GUIDE AND SAID CONTAINER AND DIRECTED ACROSS THE MATERIAL PATH, MEANS FOR CONDUCTING PRESSURE GAS TO SAID JET, AND A SHUTTER ARANGED TO PASS INTERMITTENTLY BETWEEN SAID JET AND THE MATERIAL PATH.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2721371X | 1952-02-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2721371A true US2721371A (en) | 1955-10-25 |
Family
ID=10914096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US329702A Expired - Lifetime US2721371A (en) | 1952-02-01 | 1953-01-05 | Packaging of yarns and filaments |
Country Status (2)
Country | Link |
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US (1) | US2721371A (en) |
DE (1) | DE1087751B (en) |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2854731A (en) * | 1954-03-19 | 1958-10-07 | Owens Corning Fiberglass Corp | Method and means for packaging a continuous strand |
US2863208A (en) * | 1953-12-29 | 1958-12-09 | Owens Corning Fiberglass Corp | Method for packaging a continuous strand |
US2936508A (en) * | 1957-02-16 | 1960-05-17 | Buddecke Heinrich | Yarn packaging apparatus |
US2983025A (en) * | 1958-08-26 | 1961-05-09 | Owens Corning Fiberglass Corp | Strand packaging apparatus |
US3000691A (en) * | 1955-10-05 | 1961-09-19 | American Cyanamid Co | Fluid treatment of rectangularly piled polyacrylonitrile tow |
US3039169A (en) * | 1955-10-12 | 1962-06-19 | Owens Corning Fiberglass Corp | Method and apparatus for forming cloth-like mats of oriented continuous strands |
US3039170A (en) * | 1958-11-05 | 1962-06-19 | Kendall & Co | Apparatus for making reinforced fabrics and the like |
US3059308A (en) * | 1960-01-22 | 1962-10-23 | Fleissner Gmbh | Method and means for packing ropes in folded from into cartons, crates or like containers |
US3094292A (en) * | 1960-04-25 | 1963-06-18 | Owens Corning Fiberglass Corp | Method and apparatus for traverse of strand material |
US3107411A (en) * | 1958-08-26 | 1963-10-22 | Owens Corning Fiberglass Corp | Strand package method |
US3123269A (en) * | 1959-05-25 | 1964-03-03 | Handler for folding tape | |
US3293718A (en) * | 1963-07-01 | 1966-12-27 | Du Pont | Apparatus for forming non-woven web structures |
US3396443A (en) * | 1966-02-08 | 1968-08-13 | Techniservice Corp | Strand treatment process and apparatus |
DE1280205B (en) * | 1962-07-18 | 1968-10-17 | Artos Meier Windhorst Kg | Abtafler |
DE1283071B (en) * | 1964-08-10 | 1968-11-14 | Eastman Kodak Co | Device for depositing a multi-strand strand |
US3487421A (en) * | 1968-04-02 | 1969-12-30 | Goodrich Co B F | Packaging apparatus |
US3660867A (en) * | 1966-07-29 | 1972-05-09 | Celanese Corp | Method for production of cross-lapped structures |
US3759010A (en) * | 1971-01-18 | 1973-09-18 | Allied Chem | Screw jet pack for textile fibers |
US3953019A (en) * | 1972-11-15 | 1976-04-27 | Fitzwilton Limited | Film folding machine |
US4005505A (en) * | 1975-05-27 | 1977-02-01 | Owens-Corning Fiberglas Corporation | Method of producing a sliver-like fibrous element |
EP0046226A1 (en) * | 1980-08-19 | 1982-02-24 | Siemens Aktiengesellschaft | Device for laying a continuous pre-folded paper web in a paper stacker |
US4411562A (en) * | 1975-07-16 | 1983-10-25 | Riter Machine Works, Ltd. | Apparatus and method for separating opened end flocks from a transporting air stream |
EP0875477A2 (en) * | 1997-05-01 | 1998-11-04 | Hoechst Celanese Corporation | Method and apparatus of collecting a textile tow in a container |
WO1999006314A1 (en) * | 1997-07-31 | 1999-02-11 | E.I. Du Pont De Nemours And Company | Air jet piddling |
US6131785A (en) * | 1998-08-27 | 2000-10-17 | E. I. Du Pont De Nemours And Company | Air jet piddling |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19544662A1 (en) * | 1995-11-30 | 1997-06-05 | Rieter Automatik Gmbh | Melt spinning spinneret - has structured blower jet outlet directed at extruded filaments and induction heating at the spinneret packet |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1353613A (en) * | 1919-04-23 | 1920-09-21 | James H Renton | Cop-making apparatus |
US1653311A (en) * | 1922-04-17 | 1927-12-20 | Int Harvester Co | Piling machine |
US1710817A (en) * | 1926-01-02 | 1929-04-30 | American Mfg Co | Method and apparatus for piling fibrous material |
US1858945A (en) * | 1930-06-05 | 1932-05-17 | Mackie & Sons Ltd J | Device for packing sliver into cans |
US1915451A (en) * | 1930-12-22 | 1933-06-27 | Brown Co | Method of and means for directing and accumulating strand material |
US2115423A (en) * | 1934-05-18 | 1938-04-26 | Philips Nv | Method and device for transporting wires |
FR830773A (en) * | 1937-12-13 | 1938-08-09 | Wire winding improvements | |
US2190597A (en) * | 1938-10-19 | 1940-02-13 | Dritz Traum Company Inc | Measuring device |
GB525283A (en) * | 1939-02-16 | 1940-08-26 | Mackie & Sons Ltd J | Improvements in and relating to the coiling and packing of sliver into cans |
US2242988A (en) * | 1939-05-10 | 1941-05-20 | Courtaulds Ltd | Method for the manufacture and production of curled monfil |
US2304260A (en) * | 1938-11-17 | 1942-12-08 | Ernest G Keller | Apparatus for packing containers with yarn |
US2333267A (en) * | 1939-03-03 | 1943-11-02 | Owens Corning Fiberglass Corp | Apparatus for the production of glass yarns |
US2347046A (en) * | 1941-01-14 | 1944-04-18 | Gen Electric | Method and apparatus for loading flash lamps |
US2393243A (en) * | 1943-10-06 | 1946-01-22 | Western Electric Co | Strand handling apparatus and a method of handling strands |
US2447982A (en) * | 1945-04-17 | 1948-08-24 | American Viscose Corp | Method and apparatus for handling continuous yarns and the like |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE452666C (en) * | 1927-11-19 | Charles Sandoz | Thread guide for rayon spinning machines | |
DE663026C (en) * | 1933-03-09 | 1938-07-27 | I G Farbenindustrie Akt Ges | Method and device for the production of artificial threads u. like |
FR798033A (en) * | 1934-11-30 | 1936-05-08 | Anonima Minerva Soc | Improvements in methods and devices for the continuous treatment of bands or ribbons of artificial silk schappe |
BE505629A (en) * | 1950-11-16 |
-
1953
- 1953-01-05 US US329702A patent/US2721371A/en not_active Expired - Lifetime
- 1953-02-02 DE DEI6865A patent/DE1087751B/en active Pending
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1353613A (en) * | 1919-04-23 | 1920-09-21 | James H Renton | Cop-making apparatus |
US1653311A (en) * | 1922-04-17 | 1927-12-20 | Int Harvester Co | Piling machine |
US1710817A (en) * | 1926-01-02 | 1929-04-30 | American Mfg Co | Method and apparatus for piling fibrous material |
US1858945A (en) * | 1930-06-05 | 1932-05-17 | Mackie & Sons Ltd J | Device for packing sliver into cans |
US1915451A (en) * | 1930-12-22 | 1933-06-27 | Brown Co | Method of and means for directing and accumulating strand material |
US2115423A (en) * | 1934-05-18 | 1938-04-26 | Philips Nv | Method and device for transporting wires |
FR830773A (en) * | 1937-12-13 | 1938-08-09 | Wire winding improvements | |
US2190597A (en) * | 1938-10-19 | 1940-02-13 | Dritz Traum Company Inc | Measuring device |
US2304260A (en) * | 1938-11-17 | 1942-12-08 | Ernest G Keller | Apparatus for packing containers with yarn |
GB525283A (en) * | 1939-02-16 | 1940-08-26 | Mackie & Sons Ltd J | Improvements in and relating to the coiling and packing of sliver into cans |
US2333267A (en) * | 1939-03-03 | 1943-11-02 | Owens Corning Fiberglass Corp | Apparatus for the production of glass yarns |
US2242988A (en) * | 1939-05-10 | 1941-05-20 | Courtaulds Ltd | Method for the manufacture and production of curled monfil |
US2347046A (en) * | 1941-01-14 | 1944-04-18 | Gen Electric | Method and apparatus for loading flash lamps |
US2393243A (en) * | 1943-10-06 | 1946-01-22 | Western Electric Co | Strand handling apparatus and a method of handling strands |
US2447982A (en) * | 1945-04-17 | 1948-08-24 | American Viscose Corp | Method and apparatus for handling continuous yarns and the like |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2863208A (en) * | 1953-12-29 | 1958-12-09 | Owens Corning Fiberglass Corp | Method for packaging a continuous strand |
US2854731A (en) * | 1954-03-19 | 1958-10-07 | Owens Corning Fiberglass Corp | Method and means for packaging a continuous strand |
US3000691A (en) * | 1955-10-05 | 1961-09-19 | American Cyanamid Co | Fluid treatment of rectangularly piled polyacrylonitrile tow |
US3039169A (en) * | 1955-10-12 | 1962-06-19 | Owens Corning Fiberglass Corp | Method and apparatus for forming cloth-like mats of oriented continuous strands |
US2936508A (en) * | 1957-02-16 | 1960-05-17 | Buddecke Heinrich | Yarn packaging apparatus |
US2983025A (en) * | 1958-08-26 | 1961-05-09 | Owens Corning Fiberglass Corp | Strand packaging apparatus |
US3107411A (en) * | 1958-08-26 | 1963-10-22 | Owens Corning Fiberglass Corp | Strand package method |
US3039170A (en) * | 1958-11-05 | 1962-06-19 | Kendall & Co | Apparatus for making reinforced fabrics and the like |
US3123269A (en) * | 1959-05-25 | 1964-03-03 | Handler for folding tape | |
DE1233816B (en) * | 1960-01-22 | 1967-02-09 | Fleissner G M B H | Device for the folded insertion of textile fiber cables in cardboard boxes, boxes or similar containers |
US3059308A (en) * | 1960-01-22 | 1962-10-23 | Fleissner Gmbh | Method and means for packing ropes in folded from into cartons, crates or like containers |
US3094292A (en) * | 1960-04-25 | 1963-06-18 | Owens Corning Fiberglass Corp | Method and apparatus for traverse of strand material |
DE1280205B (en) * | 1962-07-18 | 1968-10-17 | Artos Meier Windhorst Kg | Abtafler |
US3293718A (en) * | 1963-07-01 | 1966-12-27 | Du Pont | Apparatus for forming non-woven web structures |
DE1283071B (en) * | 1964-08-10 | 1968-11-14 | Eastman Kodak Co | Device for depositing a multi-strand strand |
US3396443A (en) * | 1966-02-08 | 1968-08-13 | Techniservice Corp | Strand treatment process and apparatus |
US3660867A (en) * | 1966-07-29 | 1972-05-09 | Celanese Corp | Method for production of cross-lapped structures |
US3487421A (en) * | 1968-04-02 | 1969-12-30 | Goodrich Co B F | Packaging apparatus |
US3759010A (en) * | 1971-01-18 | 1973-09-18 | Allied Chem | Screw jet pack for textile fibers |
US3953019A (en) * | 1972-11-15 | 1976-04-27 | Fitzwilton Limited | Film folding machine |
US4085881A (en) * | 1975-05-27 | 1978-04-25 | Owens-Corning Fiberglas Corporation | Apparatus for advancing a linear fibrous element |
US4005505A (en) * | 1975-05-27 | 1977-02-01 | Owens-Corning Fiberglas Corporation | Method of producing a sliver-like fibrous element |
US4411562A (en) * | 1975-07-16 | 1983-10-25 | Riter Machine Works, Ltd. | Apparatus and method for separating opened end flocks from a transporting air stream |
EP0046226A1 (en) * | 1980-08-19 | 1982-02-24 | Siemens Aktiengesellschaft | Device for laying a continuous pre-folded paper web in a paper stacker |
EP0875477A2 (en) * | 1997-05-01 | 1998-11-04 | Hoechst Celanese Corporation | Method and apparatus of collecting a textile tow in a container |
EP0875477A3 (en) * | 1997-05-01 | 1999-01-07 | Hoechst Celanese Corporation | Method and apparatus of collecting a textile tow in a container |
WO1999006314A1 (en) * | 1997-07-31 | 1999-02-11 | E.I. Du Pont De Nemours And Company | Air jet piddling |
US6032844A (en) * | 1997-07-31 | 2000-03-07 | E. I. Du Pont De Nemours And Company | Air jet piddling |
US6131785A (en) * | 1998-08-27 | 2000-10-17 | E. I. Du Pont De Nemours And Company | Air jet piddling |
Also Published As
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DE1087751B (en) | 1960-08-25 |
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