New! View global litigation for patent families

US3256569A - Web density control means for web forming apparatus - Google Patents

Web density control means for web forming apparatus Download PDF

Info

Publication number
US3256569A
US3256569A US31108263A US3256569A US 3256569 A US3256569 A US 3256569A US 31108263 A US31108263 A US 31108263A US 3256569 A US3256569 A US 3256569A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
web
cylinder
pressure
air
means
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
Inventor
Robert C Draving
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.)
Proctor and Schwartz Inc
Original Assignee
Proctor and Schwartz Inc
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
Grant date

Links

Images

Classifications

    • DTEXTILES; PAPER
    • D01NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING
    • D01GPRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02Carding machines
    • D01G15/12Details
    • D01G15/46Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D01G15/465Doffing arrangements for removing fibres using, or cooperating with, pneumatic means
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged

Description

June 21, 1966 R. c. DRAVlNG 3,256,569

WEB DENSITY CONTROL MEANS FOR WEB FORMING APPARATUS Filed Sept. 24, 1963 FIGI.

FIGZ.

INVENTOR: D R AV ING ROBERT C.

ATTYS nited States Patent 3,256,569 WEB DENSITY CUNTROL MEANS FOR WEB FORMING APPARATUS Robert C. Draving, Fort Washington, Pa., assignor to Proctor and Schwartz, Inc, Philadelphia, Pa., 21 corporation of Pennsylvania Filed Sept. 24, 1963, Ser. No. 311,082 1 Claim. (Cl. 19-1564) prior to delivery of the fibrous material to a carding machine, nevertheless the density of the batt presented to the feed rolls is not uniform and affects the density of the finished web.

Heretofore control of web density has been largely a sampling procedure with the feed roll speed being manually varied in response to variations in web density to compensate for such variations. Such control operations are time consuming and by nature subject to inaccuracies. In most instances there is a considerable time lag between the deviation of a web from the desired density and the changing of the feed roll speed to correct such deviation.

It is accordingly a primary object of the present iu vention to provide an arrangement for automatically and continuously maintaining a predetermined uniform web density of a fibrous web as it is formed on web forming apparatus. 4

Additional objects and advantages of the invention will be more readily apparent from the following detailed description of embodiments thereof when taken together with the accompanying drawings in which:

FIG. 1 is a schematic side elevational view showing web forming apparatus including an embodiment of the present invention for automatically maintaining a uniform web density;

*FIG. 2 is an enlarged view of the web forming area of FIG. 1 showing additional details of the web forming area; and

FIG. 3 is a view similar to FIG. 2 showing a modified embodiment of the invention.

Referring to the drawings, FIG. 1 shows a web forming machine which in this instance is a combination garnett and air doffer having a feed apron 10 for advancing fibrous material 12 into feed rolls 14 and 16. The feed rolls are driven by motor 18 through variable speed drive means 20.

The fibrous material passes through the feed rolls from which it is picked up by lickerin 22, lumper 24, and the first main cylinder 26. As the material passes around the first main cylinder the fibers are separated, straightened and leveled by workers 28, 30 and 32 and their respective strippers 3 4, 36 and 38. Passing under fancy roll 40 and fancy stripper 42, the material is transferred from the first main cylinder by doifer 44 to the second main cylinder 46 on which it is subjected to worker 48 and stripper 50. As the fibrous material reaches the top of the second main cylinder it is engaged by an air flow passing along air plate 52 and advanced against the perforate condensing cylinder 54. Vacuum box 56 within the condensing cylinder 54 causes the air flow to pass through the perforate cylinder, depositing the fibrous materials as a web 5 8 on the perforate cylinder surface. Sealing roll 66 effects the desired compacting of the web which travels over the condensing cylinder and onto delivery apron 62.

The condensing cylinder is supported and driven by drive wheels 64 and 66 and maintained in position by hold down wheels 68. The vacuum box 56is connected at the ends of the-condensing cylinder with ducts 70 leading into the fan 72. The air from the fan is directed into an air balancer 74, through curved duct 76 and along the air plate 52 into the vacuum box 56 through the perforated condensing cylinder.

By reference to FIG. 2 or 3 the air flow and fiber path in the Web forming area adjacent the condensing cylinder may be more clearly understood. The fibrous material passes from the toothed wire surface 78 of the second main cylinder 46 into the web forming area 80. The material is removed from the main cylinder by the air stream passing along the air plate 52 in conjunction with the dofi'er blade 81 positioned tangentially to the main cylinder between the main cylinder and the condensing cylinder. The fibrous material is directed as shown against the condensing cylinder 54 with the air stream passing through the holes 84 in the cylinder into the vacuum box 56 The above described apparatus of a type known in the art is typical of the type of equipment with which the present invention as described below may be employed.

The embodiment shown in FIGS. 1 and 2 includes pressure sensing means consisting of a conduit 86 opening into the web-forming area by means of threaded fitting 88 secured in the air plate 52. The conduit 86 leads into a pilot controller 90 which in response to variations of pressure in the web forming area varies the speed output of the variable speed drive means 20 by actuation of pneumatic speed varying cylinder 92 through the conduits 94 and 96. The variable speed drive means may for example be a Reeves drive or other suitable speed changing mechanism.

In operation, the embodiment shown in FIGS. 1 and 2 functions in the following manner. Should the density of the web forming on the condensing cylinder become lower than desired, the air flow along the air plate 5 2 increases in velocity due to the decreased resistance presented by the forming web. The increased air velocity along the air plate results in a decreased pressure in the conduit 86 and the pilot controller d0 translates such a pressure change into the requisite speed control for the variable speed drive means 20 so as to increase the speed of the feed rolls 14 and 16 and thus deposit a denser web upon the condensing cylinder. The main cylinders, workers and condensing cylinder are driven independently of the feed rolls and it is thus only the speed of the feed rolls which is altered to change the web density.

If, on the other hand, the density of the web in the web forming area should increase above a predetermined density limit, the air passing along the air plate is decreased in velocity due to the increased resistance of the denser web. As a result, the air pressure in the conduit 86 as sensed by the pilot controller 90 is increased and in response the controller decreases the speed of the feed rolls 14 and 16 to decrease the density of the Web formed on the condensing cylinder.

With webs of substantial width, it is desirable to employ two or more pressure sensing means spaced along the air plate such that an average pressure in the web forming area may be fed into the pressure sensing unit 90. This may be accomplished by joining the several conduits of the pressure sensing means prior to connection with the pilot controller.

In the embodiment shown in FIG. 3, an additional pressure sensing means is provided in the vacuum box 56 for sensing the negative pressure in the box and includes Patented June 21, 1966 conduit 98 connected with the vacuum box by fitting 100. The addition of such pressure sensing means in the vacuum box permits a sensing by the pilot controller 90 of the variations in the pressure differential between the air plate and the vacuum box, which pressure variations would be of a greater magnitude than those obtainable simply by sensing the pressure changes at the air plate. Accordingly, the arrangement shown in FIG. 3 would permit a substantially greater accuracy of control than the embodiment shown in FIGS. 1 and 2. As was suggested with respect to the pressure sensing means on the air plate, it is preferable to include a plurality of spaced pressure sensing means on the vacuum box to permit an averaging of the negative pressure readings.

Although in the embodiments shown a pilot controller is employed to pneumatically vary the speed of the drive means, it is obvious that other pressure sensitive arrangements could be employed such as an electric pressure gauge to activate an electric speed varying device upon deviation of the web density from pre-established density limits.

Manifestly, changes in details of construction can be effected by those skilled in the art without departing from the spirit and the scope of the invention as defined in and limited solely by the appended claims.

I claim:

In a machine for forming a continuous web of fibrous material at a constant rate including feed rolls for advancing fibrous materials into the machine, variable speed drive means for driving the feed rolls, a condensing cylinder, means for driving said condensing cylinder at a constant speed, a main cylinder closely adjacent the condensing cylinder, a restricted web forming area between the main cylinder and the condensing cylinder having a narrow portion adjacent the main cylinder and an enlarged portion adjacent the condensing cylinder, means for passing air under pressure through the restricted webforming area for dofiing fibrous material from the periphery of the main cylinder to the peripheral surface of the condensing cylinder, pressure sensing means for sensing variations in pressure in the narrow portion of the web-forming area, and controller means connected with said pressure sensing means operable for varying the speed of said feed roll drive means in response to variations in density of the fibrous web, the pressure in said web-forming area being proportional to the density of the web, whereby a predetermined uniform web density and a constant web travel rate may be continuously and automatically maintained.

References Cited by the Examiner UNITED STATES PATENTS 974,858 11/1910 Brown 19156.4 2,152,901 4/1939 Manning. 2,648,876 8/1953 Phillips et al. 19106 X 2,703,441 3/1955 Langdon et al. 19156.1 2,952,047 9/1960 Lytton et al. 3,010,161 11/1961 Duvall 19-156 3,037,248 6/1962 Callaghan 19-156.4 3,108,332 10/1963 Moss et a1. 19--204 X FOREIGN PATENTS 880,698 10/1961 Great Britain.

DONALD W. PARKER, Primary Examiner.

D. NEWTON, Assistant Examiner.

US3256569A 1963-09-24 1963-09-24 Web density control means for web forming apparatus Expired - Lifetime US3256569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3256569A US3256569A (en) 1963-09-24 1963-09-24 Web density control means for web forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3256569A US3256569A (en) 1963-09-24 1963-09-24 Web density control means for web forming apparatus

Publications (1)

Publication Number Publication Date
US3256569A true US3256569A (en) 1966-06-21

Family

ID=23205317

Family Applications (1)

Application Number Title Priority Date Filing Date
US3256569A Expired - Lifetime US3256569A (en) 1963-09-24 1963-09-24 Web density control means for web forming apparatus

Country Status (1)

Country Link
US (1) US3256569A (en)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526023A (en) * 1967-08-18 1970-09-01 Algemene Kunstzijde Unie Nv Apparatus for box crimping synthetic yarns
US3641628A (en) * 1969-02-07 1972-02-15 Ernst Fehrer Apparatus for manufacturing webs from fiber material
US3787930A (en) * 1971-08-12 1974-01-29 Kendall & Co Process for randomizing card webs
US3903570A (en) * 1972-10-20 1975-09-09 Iii Daniel G Rowe Apparatus for forming a lap of textile fiber
US3962753A (en) * 1974-05-06 1976-06-15 Owens-Corning Fiberglas Corporation Method of making glass fiber mats and controlling pressure drop across web by varying perforated plate beneath web
US4064600A (en) * 1976-08-17 1977-12-27 Scott Paper Company Method for forming fibrous structures
US4068351A (en) * 1976-07-12 1978-01-17 Rsm Co. Method of increasing the capacity of a carding machine
US4075739A (en) * 1974-11-01 1978-02-28 Rieter Machine Works, Ltd. Method and apparatus for controlling a card
US4153977A (en) * 1977-03-18 1979-05-15 Rieter Machine Works Ltd., Switzerland Method of forming a continuous fiber layer of constant weight per unit length and apparatus for implementing the method
DE2912558A1 (en) * 1978-04-26 1979-10-31 Zellweger Uster Ag An apparatus for obtaining a density of the fibrous web on the tambour of a card resting corresponding control signal
US4199843A (en) * 1977-02-02 1980-04-29 Trutzschler Gmbh & Co. Kg Apparatus for producing a uniform continuous card sliver
US4274178A (en) * 1979-03-28 1981-06-23 Kabushiki Kaisha Kyowa Kikai Seisakusho Device for stripping a fibrous web from a doffer in a carding machine
US4279060A (en) * 1978-07-11 1981-07-21 Hergeth Kg Maschinenfabrik Und Apparatebau Method of and apparatus for the production of open non-woven fabric from fibrous material
US4475272A (en) * 1983-02-07 1984-10-09 Rando Machine Company Sliver forming condenser
US4475271A (en) * 1982-04-29 1984-10-09 Chicopee Process and apparatus for producing uniform fibrous web at high rate of speed
DE3346327A1 (en) * 1983-12-22 1985-07-18 Hollingsworth Gmbh A method and apparatus for making a random fiber web of spun material
US4543690A (en) * 1983-04-20 1985-10-01 Isover Saint-Gobain Apparatus for forming fiber felts
US4599766A (en) * 1983-12-22 1986-07-15 Hergeth Hollingsworth Gmbh Method and apparatus for forming a more even web from staple fibers
US4666647A (en) * 1985-12-10 1987-05-19 Kimberly-Clark Corporation Apparatus and process for forming a laid fibrous web
US4858277A (en) * 1987-10-09 1989-08-22 Hergeth Hollingsworth Gmbh Process and apparatus for cleaning and opening loose fiber stock, e.g. cotton
US5303455A (en) * 1990-11-13 1994-04-19 Trutzschler Gmbh & Co. Kg Apparatus for making a fiber lap
US5537718A (en) * 1992-03-27 1996-07-23 Agency Of Industrial Science & Technology, Ministry Of International Trade & Industry Method for production of material for composite article
FR2736365A1 (en) * 1995-07-07 1997-01-10 Fehrer Ernst A division in longitudinal sections of a web of fibers
US5839166A (en) * 1994-08-27 1998-11-24 Spinnbau Gmbh Carding machine and process for producing an aerodynamic card web
US5930871A (en) * 1998-07-09 1999-08-03 John D. Hollingsworth On Wheels, Inc. Air doffing system for a textile processing machine
US6061876A (en) * 1997-06-11 2000-05-16 John D. Hollingsworth On Wheels, Inc. Textile recycling machine
US20030061686A1 (en) * 2001-10-03 2003-04-03 Thibeau Method and installation for the production of a condensed nonwoven and condenser device
US20080054231A1 (en) * 2004-05-07 2008-03-06 Wenstrup David E Heat and flame shield

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US974858A (en) * 1909-08-09 1910-11-08 Union Fibre Company Apparatus for manufacturing heat-insulating linings or coverings.
US2152901A (en) * 1936-09-05 1939-04-04 F W Manning Company Ltd Method of making filter fabric
US2648876A (en) * 1947-11-18 1953-08-18 West Point Mfg Co Method and machine for producing unwoven fabrics
US2703441A (en) * 1951-02-02 1955-03-08 Curlator Corp Machine for forming composite fiber webs
US2952047A (en) * 1958-06-25 1960-09-13 Fiber Controls Corp Picker evener
GB880698A (en) * 1958-12-03 1961-10-25 Tmm Research Ltd Improvements in apparatus for use in processing textile fibres
US3010161A (en) * 1954-02-16 1961-11-28 Wood Conversion Co Method and means for producing mixed fiber suspensions in air and felts therefrom
US3037248A (en) * 1959-08-10 1962-06-05 Birfield Eng Ltd Apparatus for forming fibrous materials into a web
US3108332A (en) * 1961-05-23 1963-10-29 Botany Ind Inc Automatic control system for producing a bat of uniform thickness in lint cleaners

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US974858A (en) * 1909-08-09 1910-11-08 Union Fibre Company Apparatus for manufacturing heat-insulating linings or coverings.
US2152901A (en) * 1936-09-05 1939-04-04 F W Manning Company Ltd Method of making filter fabric
US2648876A (en) * 1947-11-18 1953-08-18 West Point Mfg Co Method and machine for producing unwoven fabrics
US2703441A (en) * 1951-02-02 1955-03-08 Curlator Corp Machine for forming composite fiber webs
US3010161A (en) * 1954-02-16 1961-11-28 Wood Conversion Co Method and means for producing mixed fiber suspensions in air and felts therefrom
US2952047A (en) * 1958-06-25 1960-09-13 Fiber Controls Corp Picker evener
GB880698A (en) * 1958-12-03 1961-10-25 Tmm Research Ltd Improvements in apparatus for use in processing textile fibres
US3037248A (en) * 1959-08-10 1962-06-05 Birfield Eng Ltd Apparatus for forming fibrous materials into a web
US3108332A (en) * 1961-05-23 1963-10-29 Botany Ind Inc Automatic control system for producing a bat of uniform thickness in lint cleaners

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526023A (en) * 1967-08-18 1970-09-01 Algemene Kunstzijde Unie Nv Apparatus for box crimping synthetic yarns
US3641628A (en) * 1969-02-07 1972-02-15 Ernst Fehrer Apparatus for manufacturing webs from fiber material
US3787930A (en) * 1971-08-12 1974-01-29 Kendall & Co Process for randomizing card webs
US3903570A (en) * 1972-10-20 1975-09-09 Iii Daniel G Rowe Apparatus for forming a lap of textile fiber
US3962753A (en) * 1974-05-06 1976-06-15 Owens-Corning Fiberglas Corporation Method of making glass fiber mats and controlling pressure drop across web by varying perforated plate beneath web
US4075739A (en) * 1974-11-01 1978-02-28 Rieter Machine Works, Ltd. Method and apparatus for controlling a card
US4068351A (en) * 1976-07-12 1978-01-17 Rsm Co. Method of increasing the capacity of a carding machine
US4064600A (en) * 1976-08-17 1977-12-27 Scott Paper Company Method for forming fibrous structures
US4199843A (en) * 1977-02-02 1980-04-29 Trutzschler Gmbh & Co. Kg Apparatus for producing a uniform continuous card sliver
US4153977A (en) * 1977-03-18 1979-05-15 Rieter Machine Works Ltd., Switzerland Method of forming a continuous fiber layer of constant weight per unit length and apparatus for implementing the method
DE2912558A1 (en) * 1978-04-26 1979-10-31 Zellweger Uster Ag An apparatus for obtaining a density of the fibrous web on the tambour of a card resting corresponding control signal
US4279060A (en) * 1978-07-11 1981-07-21 Hergeth Kg Maschinenfabrik Und Apparatebau Method of and apparatus for the production of open non-woven fabric from fibrous material
US4274178A (en) * 1979-03-28 1981-06-23 Kabushiki Kaisha Kyowa Kikai Seisakusho Device for stripping a fibrous web from a doffer in a carding machine
US4475271A (en) * 1982-04-29 1984-10-09 Chicopee Process and apparatus for producing uniform fibrous web at high rate of speed
US4475272A (en) * 1983-02-07 1984-10-09 Rando Machine Company Sliver forming condenser
US4543690A (en) * 1983-04-20 1985-10-01 Isover Saint-Gobain Apparatus for forming fiber felts
US4599766A (en) * 1983-12-22 1986-07-15 Hergeth Hollingsworth Gmbh Method and apparatus for forming a more even web from staple fibers
US4615080A (en) * 1983-12-22 1986-10-07 Hergeth Hollingsworth Gmbh Method and apparatus for making a web from staple fibers
DE3346327A1 (en) * 1983-12-22 1985-07-18 Hollingsworth Gmbh A method and apparatus for making a random fiber web of spun material
US4666647A (en) * 1985-12-10 1987-05-19 Kimberly-Clark Corporation Apparatus and process for forming a laid fibrous web
US4858277A (en) * 1987-10-09 1989-08-22 Hergeth Hollingsworth Gmbh Process and apparatus for cleaning and opening loose fiber stock, e.g. cotton
US5303455A (en) * 1990-11-13 1994-04-19 Trutzschler Gmbh & Co. Kg Apparatus for making a fiber lap
US5537718A (en) * 1992-03-27 1996-07-23 Agency Of Industrial Science & Technology, Ministry Of International Trade & Industry Method for production of material for composite article
US5839166A (en) * 1994-08-27 1998-11-24 Spinnbau Gmbh Carding machine and process for producing an aerodynamic card web
FR2736365A1 (en) * 1995-07-07 1997-01-10 Fehrer Ernst A division in longitudinal sections of a web of fibers
BE1010562A3 (en) * 1995-07-07 1998-10-06 Fehrer Ernst Device division in longitudinal sections of a mattress carde.
US6061876A (en) * 1997-06-11 2000-05-16 John D. Hollingsworth On Wheels, Inc. Textile recycling machine
US5930871A (en) * 1998-07-09 1999-08-03 John D. Hollingsworth On Wheels, Inc. Air doffing system for a textile processing machine
US20030061686A1 (en) * 2001-10-03 2003-04-03 Thibeau Method and installation for the production of a condensed nonwoven and condenser device
US6732412B2 (en) 2001-10-03 2004-05-11 Thibeau Method and installation for the production of a condensed nonwoven and condenser device
US20080054231A1 (en) * 2004-05-07 2008-03-06 Wenstrup David E Heat and flame shield
US7454817B2 (en) * 2004-05-07 2008-11-25 Milliken & Company Heat and flame shield

Similar Documents

Publication Publication Date Title
US3284857A (en) Apparatus for producing apertured non-woven fabrics
US4064605A (en) Method for producing non-woven webs
US2467291A (en) Process for forming felted fibrous insulating material
US2451915A (en) Machine and method for forming fiber webs
US4264289A (en) Apparatus for dry fiber forming
US3089252A (en) Web moisture profile control for paper machine
US4154889A (en) Nonwoven fabric, method and apparatus for it's manufacture
US4592213A (en) Pneumatic fiber recovery and redistribution system for sliver high pile fabric knitting machines
US3740797A (en) Method of forming webs and apparatus therefor
US3016582A (en) Batt or mat forming apparatus
US5791489A (en) Apparatus for separating foreign bodies from a fiber tuft stream
US3963392A (en) Apparatus for preparing air-laid nonwoven webs from combined streams
US2689196A (en) Web drier
US2336745A (en) Method and apparatus for making unwoven and composite fabrics
US4153488A (en) Manufacture of fibrous web structures
US3717905A (en) Air laying apparatus
US5018246A (en) Passage width adjusting device for a sliver trumpet
US4016319A (en) Biaxially oriented nonwoven fabric having long and short fibers
US2569765A (en) Method and apparatus for making an absorption control element
US2940133A (en) Continuous deposition of dry felted structures
US4004323A (en) Method of forming a nonwoven fibrous web
US4083913A (en) Stabilization of mixed-fiber webs
US20020124354A1 (en) Apparatus for regulating fiber tuft quantities supplied to a carding machine
US3812553A (en) Reorientation of fibers in a fluid stream
US4820317A (en) Method and apparatus for controlling the suction pressure in a dust collecting duct