US3225391A - Fiber transfer controlling apparatus and method for main cylinder of a card - Google Patents

Fiber transfer controlling apparatus and method for main cylinder of a card Download PDF

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Publication number
US3225391A
US3225391A US211241A US21124162A US3225391A US 3225391 A US3225391 A US 3225391A US 211241 A US211241 A US 211241A US 21124162 A US21124162 A US 21124162A US 3225391 A US3225391 A US 3225391A
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cylinder
main cylinder
main
doffer
fibers
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US211241A
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Joe R Whitehurst
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Barber Colman Co
Ideal Industries Inc
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Ideal Industries Inc
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Assigned to BARBER-COLMAN COMPANY reassignment BARBER-COLMAN COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WARNER & SWASEY TEXTILE MACHINE COMPANY A CORP OF PA.
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions

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  • the present invention relates to carding machines, and more particularly to an apparatus and method for preventing the accumulation or build-up of fibers on the doifer cylinder of such carding machine when the same is not rotating.
  • a rotatable large main cylinder having clothing comprising many thousand closely spaced wires extending outwardly from the outer surface of the main cylinder.
  • a lap of textile fibers is fed by a pair of lap feed rolls to a licker-in which opens the lap to some extent into clumps of fibers. These clumps of fibers are transferred from the licker-in to the main cylinder.
  • the clothing on the main cylinder carries the clumps of fibers forwardly as the main cylinder rotates and cooperates to further open the clumps of fibers with similar clothing carried by a plurality of revolving flats which move in close proximity to the surface of the main cylinder and in the same direction, but at a slower speed.
  • a doffer cylinder is disposed on the opposite side of the main cylinder from the licker-in and is positioned closely adjacent thereto.
  • the dofifer cylinder has clothing thereon similar to the main cylinder which passes in close proximity to the clothing of the main cylinder. At the point of closest proximity the clothing on the dolfer cylinder travels in the same linear direction as the clothing on the main cylinder but at a slower speed.
  • the fibers are therefore further opened into a thin web and the majority of the textile fibers are removed from the clothing of the main cylinder by the doffer clothing to eifect transference of the fibers.
  • the fibers are subsequently removed from the doifer cylinder in the form of a web which is normally condensed into sliver form which in turn is normally coiled in a suitable receptacle.
  • the present invention contemplates controlling the transfer of fibers from the main cylinder to the dotfer cylinder in such a manner to maintain substantially the same amount of fibers on the doffer cylinder during the period when normal operation thereof is interrupted as the amount of fibers thereon during normal operation thereof.
  • the present invention contemplates reducing the amount of fibers transferred onto the doffer cylinder in direct proportion to the deceleration thereof during the period of such deceleration, preventing the transfer of fibers thereto during the period when the doffer cylinder is not rotating, and increasing the transfer of fibers in direct proportion to the acceleration of the dotier cylinder during the period of such acceleration.
  • a further object of the present invention is to provide an apparatus and method for a carding machine Wherein the transfer of fibers from the rotating main cylinder to the doffer cylinder is reduced in direct proportion to deceleration of the dotfer cylinder when the normal operation thereof is interrupted.
  • a more specific object of the present invention is to provide an apparatus and method of the character last described wherein transfer of fibers from the main cylinder to the dolfer cylinder is prevented when the doffer cylinder is not rotating, and wherein the transfer of fibers from the main cylinder to the doffer cylinder is increased in direct proportion to acceleration of the doifer cylinder when the same is started rotating again.
  • a still more specific object of the present invention is to provide means disposed adjacent to the point of tangency of the main and doffer cylinders and which is operable when the dolfer cylinder is stopped to direct a stream of air into the surface of the main cylinder for substantially the full width thereof and in a direction to exert a centripetal force on the textile fibers carried thereby having at least a component directed inwardly toward the axis of the main cylinder to retain the fibers on the main cylinder so that the same will pass by the doffer cylinder without being cast thereon.
  • a further more specific object of the present invention is to provide means of the character last described which main cylinder 21 (FIGURES 3 and is adjustable to vary the retaining force exerted on the fibers on the main cylinder for maintaining these fibers on the main cylinder and thus to prevent transfer thereof onto the doffer cylinder.
  • a still further more specific object of the present invention is to provide a chamber disposed forwardly of the point of tangency of the main and dolfer cylinders with respect to the direction of rotation thereof and communicating with the surface of the main cylinder through at least one elongate restricted opening for directing a stream of air onto the surface of the main cylinder in a direction to force the fibers carried thereby deeper into the card clothing thereon so that the fibers are retained on the main cylinder as they are carried past the doffer cylinder, the walls defining the opening extending inwardly toward the main cylinder at a downward acute angle relative to the horizontal or in the general direction of the point of tangency of said main and doifer cylinders to prevent fibers from being cast off the main cylinder and through the opening into the chamber when air is not being directed therethrough.
  • Another object of the present invention is to provide a method of preventing build-up or accumulations of textile fibers on the doffer cylinder of a carding machine when the doifer cylinder is not rotating and the main cylinder thereof is still rotating wherein air currents are directed against the main cylinder adjacent the point of tangency of said main and dofier cylinders to cause the fibers carried by said main cylinder to be forced into the clothing of the main cylinder until the fibers have been carried past the doifer cylinder.
  • FIGURE 1 is a perspective view of a carding machine embodying the apparatus of the present invention
  • FIGURE 2 is an enlarged fragmentary vertical section of the medial portion of the apparatus shown in FIGURE 1 and showing portions of the main cylinder and doffer cylinder of the carding machine with the apparatus of the present invention associated therewith;
  • FIGURE 3 is an isometric view with portions broken away of the apparatus of the present invention shown in FIGURE 2;
  • FIGURE 4 is an enlarged fragmentary section taken substantially along line 4-4 in FIGURE 3;
  • FIGURE 5 is a fragmentary section similar to FIG- URE 2 showing another embodiment of the apparatus of the present invention.
  • FIGURE 6 is an isometric view similar to FIGURE 3 of the apparatus shown in FIGURE 5;
  • FIGURE 7 is an enlarged fragmentary section taken substantially along line 7--7 in FIGURE 6;
  • FIGURE 8 is an end elevation of a portion of the main cylinder of a carding machine with still another embodiment of the apparatus of the present invention associated therewith;
  • FIGURE 9 is an enlarged vertical section of the apparatus shown in FIGURE 8.
  • FIGURE 10 is an isometric view of one end portion of the apparatus shown in FIGURE 8 with portions broken away;
  • FIGURE 11 is a schematic View of the apparatus of the present invention showing the mechanism for controlling the same.
  • FIGURE 1 there is shown a carding machine generally indicated at which includes a norm-ally rotating Main cylinder 21 has clothing 22 (FIGURES 3 and 5) thereon Which comprises many thousand closely spaced Wires upstanding from and substantially covering the outer surface of the main cylinder.
  • a licker-in 23 (FIGURE 1) is disposed adjacent main cylinder 21 at the reaward side thereof and a pair of feed rolls (not shown) is disposed adjacent licker-in 23 to feed a lap L of textile fibers to licker-in 23 which opens the lap into clumps and feeds these clumps to main cylinder 21.
  • Main cylinder 21 cooperates with a plurality of revolving flats 24 which are positioned over main cylinder 21 and in close proximity thereto.
  • Revolving flats 24 likewise have clothing thereon (not shown) which moves in the same direction as clothing 22 but at a slower speed so that the clothing on flats 24 cooperates with clothing 22 on main cylinder 21 to further open the clumps of textile fibers to clean the textile fibers as is well known in this type of machine.
  • a doifer cylinder 25 (FIGURES 3 and 5) is disposed closely adjacent to main cylinder 21 at the forward side thereof and has clothing 26 thereon.
  • Main cylinder 21 and doifer cylinder 25 cooperate to define a point of tangency where clothing 26 on doffer cylinder 25 passes in close proximity to clothing '22 on main cylinder 21.
  • Doffer cylinder 25 rotates at a slower speed than main cylinder 21 and in the opposite angular direction so that clothing 26 is traveling in the same linear direction as but at a slower speed than clothing 22.
  • Clothing 22 and 26 cooperate to further open the textile fibers and doifer cylinder 25 removes the textile fibers from main cylinder 21 and carries the same around therebeneath to a point at the forward side thereof where the same are removed by a doffer comb 27 (FIGURE 1) of conventional construction.
  • the web W removed by comb 27 is directed through a trumpet (not shown) which condenses the web into a sliver S.
  • a pair of calender rolls 30 are positioned on the opposite side of the trumpet from comb 27 and receive the sliver there-between. Calender rolls 30 serve to draw the web of textile fibers through the trumpet and to deliver the sliver S to a coiler head 31.
  • Coile-r head 31 coils the sliver S within a suitable receptacleor sliver can 32. It is noted that coiler head 31 preferably includes a conventional stop motion (not shown) which will serve to stop the carding machine 20 when the sliver S or the web W breaks.
  • the operating elements of a carding machine are conventionally driven in several different manners and the following description is of a typical drive for a carding machine of this type.
  • the main cylinder 21 is driven from an overhead line shaft (not shown) by a belt (also not shown) which is supported at its lower end by fast and loose pulleys 33, 34, respectively, (FIGURE 1).
  • Fast pulley 33 is drivingly mounted on shaft 35 of main cylinder 21 and loose pulley 34 is mounted on shaft 35 for free rotation relative thereto.
  • the drive belt is shiftable between fast pulley 33 and loose pulley 34 to control the rotation of main cylinder 21.
  • Licker-in 23 is driven from shaft 35 of main cylinder 21 by a belt and pulley arrangement (not shown).
  • a :drive pulley 36 is mounted on the shaft of licker-in 23 for rotation therewith and drivingly supports one end of a belt 37.
  • the other end of belt 37 is supported by a pulley 40 mounted on a stub shaft 41.
  • Stub shaft 41 is ournaled for rotation on a control lever 42 which is mounted for pivotal movement about a pivot pin 43.
  • a pinion gear 44 (FIGURE 11), is mounted on shaft 41 for rotation therewith and is movable into driving engagement with a gear 45.
  • Pivot pin 43 is adjustably mounted on the frame of carding machine 26 to vary the distance which gear 44 must move to mesh with gear 45.
  • Gear 45 1 s drivingly mounted on shaft 46 of doflFer cylinder 25 and also serves to drive a first intermediate gear 47 mounted in meshing relationship therewith.
  • a second intermediate gear 48 is disposed in meshing relationship with first intermediate gear 47 and with a gear 59 mounted on shaft 51 of lower calender roll 30.
  • upper calender roll 30 is an idler roll mounted for free rotation and is driven by frictional contact with lower calender roll 30.
  • the coiler head 31 is driven from shaft 51 of lower calender roll 30 and comb 27 is driven from main cylinder 21 in a manner not shown.
  • the lap feed rolls are driven from shaft 46 of doffer cylinder 25 in a manner also not shown, but in a manner which is conventional.
  • An operating handle 52 is pivotally mounted at the front of carding machine 29 and includes a cam portion 53 which is disposed beneath the forward end of control lever 42 such that when operating handle 52 is moved clockwise about its pivot, cam portion 53 will raise control lever 42 in a counterclockwise direction around pivot 43. This will move gear 44 into meshing relation with gear and will thereby cause dotfer cylinder 25, the lap feed rolls, calender rolls 30, comb 27 and coiler head 31 to be operated.
  • Front plate 54 is formed in three sections, i.e., upper, middle, and lower sections 54a, 54b and 540, respectively.
  • the upper section 54a is adjustable relative to the surface of main cylinder 21 to control the amount of waste removed by revolving flats 24.
  • the middle section 54b of front plate 54 comprises a door which allows access to the surface of main cylinder 21 for stripping and grinding purposes.
  • the lower section 54c is also referred to as the make-up piece and is adjustable relative to the surface of main cylinder 21 for controlling the air currents generated by rotation of main cylinder 21.
  • the upper surface of doffer cylinder 25 is enclosed by a casing 55 which engages lower section or make-up piece 54c at a point spaced from the point of tangency of the main and doffer cylinders, and thereby protects the dofier cylinder and prevents harmful air currents and the like from damaging any textile fibers thereon which have not been removed by comb 27.
  • a preferably cylindrical pipe is mounted on make-up piece 54c and extends for substantially the full length thereof and therefore for the full width of main cylinder 21.
  • Pipe 60 has a portion of the wall thereof cut away along the chord of the are formed by this portion of the pipe. The thusly formed out edges are disposed in engagement with make-up piece 540 and pipe 60 is mounted on make-up piece 540 by any suitable means such as welding 61 to form an air tight seal.
  • An elongate opening 62 is formed in the portion of make-up piece 54c between the cut edges of pipe 66 and communicates with the surface of main cylinder 21. It is noted that opening 62 is formed through make-up piece 540 at a downwardly extending angle relative to the horizontal, so that textile fibers will not be east through opening 62 into pipe 69.
  • opening 62 is of a length substantially the same as the Width of clothing 22 on main cylinder 21 and that pipe 60 serves to reinforce make-up piece 54c which has been weakened somewhat by the formation of opening 62 therethrough.
  • a pair of fluid supply lines 63 are connected at one end to each of pipe 69 and communicate with the interior thereof. Opposite ends of fluid supply lines 63 are connected by a T-type connection 64 to one end of a main fluid supply line 65.
  • Main line 65 has a valve 66, preferably of the butterfly type, but which may be of any suitable construction, disposed therein to control the flow of fluid therethrough.
  • valve regulator 67 which controls the pressure applied to valve 66 to insure that a constant pressure is maintained in main supply line 65 on the opposite side of valve 66 from pipe 60.
  • the other side of valve regulator 67 is connected by a fluid supply line 70 to a suitable fluid pressure source 6 71 such as an air compressor or the like which is indicated schematically in FIGURE 11.
  • Valve 66 is mounted for pivotal movement from a closed position which does not allow any fluid flow in main supply line 65 to an open position which allows maximum fluid flow in line 65 by an actuating arm 72 which penetrates through a hearing 73 mounted in supply line 65.
  • the outer end of actuating arm 72 is formed into a crank portion 72:: to which one end of a connecting link 74 is pivotally connected.
  • the other end of connecting link 74 is pivotally connected to the upper end of a slide bar 75.
  • Slide bar 75 is mounted for vertical reciprocatory movement in a pair of spaced bearings 76.
  • a connecting bar 77 is fixedly connected at one end to slide bar 75 intermediate the bearings 76 and has a collar portion 77a at the other end thereof.
  • a governor 80 controls valve 66 and includes a first collar 81 mounted on one end of a shaft 82 for rotation therewith.
  • a plurality of brackets 83 are mounted on first collar 81 and have the upper ends of a plurality of upper links 34 mounted thereon for rotation with collar 81.
  • a plurality of lower links 85 are pivotally mounted at their upper ends on the lower ends of upper links 84 by pivot pins 86. Pins 86 have opposite ends thereof weighted to provide centrifugal force as the same rotate with shaft 82 to cause upper links 84 to pivot upwardly and outwardly on collar 81.
  • the lower ends of lower links 85 are pivotally connected to a second or lower collar 87 which is loosely mounted on shaft 82 for reciprocatory movement therealong.
  • Lower collar 37 is also weighted to cause the same to readily move downwardly as rotation of shaft 82 decreases.
  • Lower collar 87 has an annular groove in the outer surface thereof which loosely receives collar portion 77a of connecting bar 77 for reciprocatory movement therewith. It is noted that the loose mounting of collar portion 77a allows lower collar 87 to rotate therein.
  • a variable V- pulley 91 is drivingly mounted on shaft 82 and includes a first half portion 92 drivingly mounted on shaft 82 by a key 93 cooperating with alined grooves in the first portion 92 of pulley 91 and shaft 82.
  • First portion 92 has a hub 94 thereon which is externally threaded and matingly receives the internally threaded hub 95 of second half portion 96 of pulley 91.
  • Rotation of second half portion 96 relative to first half portion 92 moves second half portion 96 toward or away from first half portion 92 to vary the effective diameter of pulley 91 to vary the speed at which shaft 82 is driven.
  • a lock nut 97 is also mounted on hub 94 to lock second half portion 96 in adjusted position.
  • a V-belt 98 is supported at one end by pulley 91 and at the other end by a drive pulley 99.
  • Drive pulley 99 is mounted on shaft 46 of doffer cylinder 25 for rotation therewith and hence governor 86 registers or is responsive to the speed of rotation of dofler cylinder 25 or the absence of such speed and controls valve 66 accordingly. It is noted that while the above-described structure for controlling valve 66 in response to the speed of dofler cylinder 25 is preferred, any suitable speed responsive or speed registering means may be used without departing from the spirit of the instant invention.
  • a pipe 109 of substantially the same construction as pipe 60 is mounted on the middle section or access door 54b of front plate 54 by any suitable means such as welding 161.
  • any suitable means such as welding 161.
  • a portion of the wall of pipe 100 is cut away along the chord of the arc defined thereby and the cut edges are positioned in engagement with access door 54b.
  • access door 54b serves to close the opening formed by the cutting away of this portion and welding 101 forms an air tight seal.
  • a plurality of spaced, elongate openings 102 are formed in the portion of access door 54b disposed between the cut edges of pipe 160 and are disposed in two parallel rows. It is noted that the elongate openings 102 in one of said rows are staggered relative to the elongate openings of the other row and each of the openings in each of said rows is of sufficient length to span the space between the adjacent pair of openings in the other row. Thusly, the openings 102 will direct a stream of air against the surface of main cylinder 21 throughout the width thereof.
  • Pipe 100 is connected to a fluid pressure source (not shown) in the same manner as pipe 66 by a pair of fluid supply lines 163 communicating with opposite ends thereof and the application of fluid thereto is controlled in substantially the same manner as with pipe 60.
  • openings 162 are formed in the access door 54b at a downwardly extending angle relative to the horizontal to prevent textile fibers from being cast off of main cylinder 21 through openings 1 12 into the pipe 100.
  • a first pipe 110 is mounted in spaced brackets 111 which are in turn mounted on access door 5412 by bolts 112.
  • brackets 111 are formed of hard fibrous material or of suitable plastic material.
  • Pipe 11% is preferably constructed of a suitable transparent plastic material such that an operator of the carding machine may view the interior of pipe 110.
  • Access door 54b has an elongate opening 113 formed therein of a length substantially the same as the width of main cylinder 21 and the portions of access door 54b defining the side walls of opening 113 and the portions adjacent thereto are milled to :provide a concave arc-uate seat for pipe 110 with the milled portions having the same radius as the outer radius of pipe 110.
  • the points of engagement of pipe 110 with access door 5% are preferably caulked as indicated at 114 to provide an air tight seal.
  • An elongate opening 115 is formed in the portion of pipe 110 disposed in elongate opening 113 such that the interior of pipe 116 communicates therethrough with the outer surface of main cylinder 21.
  • tions of pipe 110 are provided with slits 116 therein to provide a split portion at each end which split portions are surrounded by split clamps 117 having screws 118 connecting the opposite ends thereof for providing a compressive clamping force to the split portions of pipe 110.
  • a second pipe 121) is mounted within pipe 110 and extends therethrough.
  • Pipe 120 is likewise preferably constructed of a transparent plastic material such that the operator may view the interior thereof.
  • Pipe 12%) has an elongate opening 121 formed therein of a length substantially the same as the width of main cylinder 21. Opening 121 is preferably formed in an area of pipe 120 corresponding to the area of pipe 110 in which opening 115 is formed such that openings 115 and 121 may be alined. Also, openings 115 and 121 are formed in pipes 110 and 120 at a downwardly extending angle relative to the horizontal as was the case with openings 62 and 102.
  • Pipe 120 is mounted for rotation in pipe 110 and is clampingly held in adjusted position by clamps 117 and the split portions of pipe 110. It is to be noted that the degree of alinement of openings 115 and 121 determine the size of the effective opening which communicates with the surface of main cylinder 21 to thereby determine the velocity of the air currents being directed against main cylinder 21.
  • the portions of pipe 120 closely adjacent to the ends of pipe 110 are preferably provided with suitable graduations as indicated at 123 which cooperate with a point 124 on the ends of pipe 110 to give a visual representation of the effective size of the opening communicating with main cylinder 21 as determined by the relative alinement of openings 115 and 12 1. Also, it is noted that the transparent character of pipes 110 and 120 allows the operator to visually monitor the relative alinement of openings 115 and 121.
  • Fluid supply lines 124 are connected to opposite ends of pipe 120 and serve to deliver fluid under pressure thereto from a suitable fluid source as was the case in the previously described embodiments.
  • dolfer cylinder 25 When normal operation of dolfer cylinder 25 is interrupted in the manner aforementioned, dolfer cylinder 25 decelerates from normal operating speed to a full or complete stop. As doffer cylinder 25 decelerates, the rotation of shaft 82 decreases and thereby the speed of rotation of governor 80 is decreased. Therefore, lower collar 37 moves downwardly a distance proportionate to the decrease in speed which moves slide bar downwardly and opens valve 66 a proportional amount. This allows air to flow through main supply line 65 to lines 63 and thence to pipe 60. It is noted that this flow of air is directly proportional to the opening of valve 66 which, as aforementioned, is inversely proportional to the speed of doifer cylinder 25.
  • valve 66 is opened to such a degree that flow of air from opening 62 is of sufficient force to prevent the transfer of any textile fibers from the main cylinder to the doifer cylinder.
  • doffer cylinder 25 is started rotating again, the procedureis reversed and the flow of air from opening 9 62 is decreased in proportion to the acceleration of dotfer cylinder 25 so that the transfer of fibers from the main cylinder to the doffer cylinder is increased in direct proportion thereto.
  • make-up piece 54c in the embodiment shown in FIGURES 2 through 4, and make-up piece 540 and access door 54b of the other embodiments cooperate with the surface of main cylinder 21 to define a closed space which will confine the air directed onto the surface of main cylinder 21 and pressure will therefore be built up therein. This increased pressure will serve to maintain the fibers in the spaces between the wires of clothing 22 until the same have passed by the point of tangency of the main and dolfer cylinders. It is noted that the speed of main cylinder 21 is such that centrifugal force will cause the fibers to move outwardly to the surface of clothing 22 after the same have passed the point of tangency of the main and doffer cylinders.
  • valve 66 When valve 66 is closed and the air stream is not being directed onto the surface of the main cylinder, the angle at which openings 62, 102, 115 and 121 are formed in make-up piece 540, access door 54b and pipes 114 and 120, respectively, relative to the horizontal prevents the casting off of fibers from main cylinder 21 through the openings into the pipes 60, 100 and 121?.
  • the angle thereof relative to the horizontal should be greater.
  • the transparency of pipes 111 and 120 allows the operator to visually monitor the operation thereof to determine when fibers are being cast into pipe 120.
  • pipe 120 may be rotated within pipe 119 to reduce the effective opening between main cylinder 21 and the interior of pipe 120 to prevent this condition from occurring. Also, pipe 120 may be rotated Within pipe 110 to vary the velocity of the air stream passing through openings 115 and 121 to thereby vary the force applied to the fibers inwardly toward the axis of the main cylinder and hence the depth at which the fibers are forced into the spaces between the wires of clothing 22.
  • tandem cards i.e., cards having two main cylinders arranged in tandem with at least one transfer cylinder therebetween and a doffer cylinder on the outlet side of the second main cylinder, are now being used extensively in the industry.
  • a machine for carding textile fibers said carding machine having a rotatable main cylinder, a rotatable differ cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, said main cylinder having clothing thereon, drive means for rotating said main and dot-fer cylinders, and control means operable to interrupt the drive to said doffer cylinder without interrupting the drive to said main cylinder to stop the rotation of said doifer cylinder while the rotation of said main cylinder is continued; the combination of force exerting means operatively associated with said main cylinder forwardly of the point of tangency of said main and dotfer cylinders relative to the direction of rotation thereof for exerting a force on the textile fibers carried by said main cylinder in a direction to retain these fibers on the main cylinder, and means operatively associated with said doffer cylinder and responsive to the absence of rotation thereof upon interruption of the drive thereto for actuating said force exerting means to prevent the transfer of fibers from the main cylinder onto the doifer
  • said force exerting means includes means communicating with the surface of said main cylinder and extending for substantially the full width thereof for directing an air stream onto the surface of said main cylinder to force any textile fibers carried thereby deeper into the clothing thereon.
  • a machine for carding textile fibers said carding machine having a rotatable main cylinder and a rotatable doffer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, said main cylinder having clothing thereon, drive means for rotating said main and doffer cylinders, and control means operable to interrupt the drive to said doffer cylinder without interrupting the drive to said main cylinder to stop the doffer cylinder while the rotation of said main cylinder is continued; the combination of means operatively associated with said main cylinder forwardly of the point of tangency of said main and doflfer cylinders with respect to the direction of rotation of the main cylinder and responsive to the absence of rotation of said doft'er cylinder for directing a stream of air onto the surface of said main cylinder for substantially the full width thereof to exert a force on the textile fibers carried by the main cylinder in a direction to retain these fibers on the main cylinder and prevent transfer thereof onto the doifer cylinder, and said air directing means
  • a carding machine for textile fibers said carding machine having a rotatable main cylinder, a rotatable dofi'er cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to the doffer cylinder at the point of tangency between said main and dolfer cylinders during rotation of said main and doifer cylinders, drive means for rotating said main and doifer cylinders, and selectively operable control means for interrupting the drive to said doffer cylinder to stop normal rotation thereof and for restarting the drive to said doffer cylinder for returning the same to normal rotation; the combination of means opertively associated with said main cylinder forwardly of the point of tangency of said main and dofier cylinders with respect to the direction of rotation of said main cylinder and responsive to the speed of rotation of said dofler cylinder for varying the transfer of fibers from said main 1 1 cylinder to said doifer cylinder in direct proportion-to the speed of rotation of
  • a carding machine for textile fibers said carding machine having a rotatable main cylinder, a rotatable doifer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being trans ferred to the doffer cylinder at the point of tangency of said main and dofler cylinders during rotation thereof, drive means for rotating said main and dotfer cylinders, and selectively operable control means for interrupting the drive to said dotfer cylinder to stop normal rotation of said dolfer cylinder so that the same decelerates to a full stop and for restarting the drive to said doifer cylinder so that the same accelerates to normal operating speed; the combination of means operatively associated with said main cylinder forwardly of the point of tangency of said main and doffer cylinders with respect to the direction of rotation of said main cylinder and responsive to the speed of rotation of said dotfer cylinder for exerting an increasing retaining force on the fibers carried by the main cylinder
  • a carding machine for textile fibers said carding machine having a rotatable main cylinder, a rotatable doffer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to said dofifer cylinder at the point of tangency thereof, drive means for rotating said main and doflFer cylinders, and selectively operable control means for stopping the drive to said doifer cylinder to interrupt normal operation thereof and for restarting the drive to said doifer cylinder to resume normal operation thereof; the combination of an elongate chamber extending across said main cylinder for substantially the full width thereof and communicating with the surface of the main cylinder at a point forwardly of the point of tangency of said main and doffer cylinders with respect to the direction of rotation of said main cylinder, means communicating with said chamber for supplying air under pressure thereto which is directed by said chamber onto the surface of the main cylinder in a direction to exert a retaining force on the textile fibers
  • a carding machine for textile fibers said carding machine having a rotatable main cylinder, a rotatable doifer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to said doifer cylinder at the point of tangency thereof, drive means for rotating said main and doffer cylinders, and selectively operable control means for stopping the drive to said dolfer cylinder to interrupt normal operation thereof and for restarting the drive to said doffer cylinder to resume normal operation thereof; the combination of an elongate plate mounted in juxtaposed relation to the surface of said main cylinder and being of a length substantially the same as the width of said main cylinder and of a width sufficient to cover the surface of the main cylinder from a point forwardly of the point of tangency of said main and doifer cylinders with respect to the direction of rotation thereof to a point closely adjacent to said point of tangency, a pipe mounted on said plate and extending for substantially the full length
  • said plate has a pair of parallel rows of spaced elongate openings therein, the elongate openings of one of said rows being staggered relative to the elongate openings of the other row and of sufiicient length to span the space therebetween, said parallel rows cooperating to provide openings through which the interior of said pipe communicates with the surface of said main cylinder for substantially the full width thereof.
  • a carding machine for textile fibers said carding machine having a rotatable main cylinder, a rotatable doffer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to said dofier cylinder at the point of tangency thereof, drive means for rotating said main and doffer cylinders, and selectively operable control means for stopping the drive to said doifer cylinder to interrupt normal operation thereof and for restarting the drive'to said do]?- er cylinder to resume normal operation thereof; the combination of an elongate plate mounted in juxtaposed relation to the surface of said main cylinder and being of a length substantially the same as the width of said main cylinder and of a width sufficient to cover the surface of the main cylinder from a point forwardly of the point of tangency of said main and doifer cylinders with respect to the direction of rotation thereof to a point closely adjacent to said point of tangency, a pipe mounted on said plate and extending
  • a carding machine for textile fibers said carding machine having a rotatable main cylinder, a rotatable doffer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to said doffer cylinder at the point of tangency thereof, drive means for rotating said main and doffer cylinders, and selectively operable control means for stopping the drive to said doffer cylinder to interrupt normal operation thereof and for restarting the drive to said dolfer cylinder to resume normal operation thereof; the combination of an elongate plate mounted in juxtaposed relation to the surface of said main cylinder and being of a length substantially the same as the width of said main cylinder and of a width suflicient to cover the surface of the main cylinder from a point forwardly of the point of tangency of said main and doffer cylinders with respect to the direction of rotation thereof to a point closely adjacent thereto, said plate having an elongate opening therein of a length substantially the
  • a method of operating a textile card to control the transfer of fibers from a rotating main cylinder to an adjacent doffer cylinder during such periods of time when the normal operation of the doffer cylinder is interrupted comprising directing a stream of air onto the surface of the main cylinder for substantially the full width thereof at a point forwardly of the closest point of proximity of the main cylinder to the doffer cylinder with respect to the direction of rotation thereof to exert a retaining force on the fibers carried by the main cylinder, and varying the stream of air in inverse proportion to the speed of rotation of the doffer cylinder to vary the transfer of fibers in direct proportion to the speed of rotation of the doffer cylinder.
  • a method of operating a card to control the transference of textile fibers from the main cylinder thereof onto the dofier when the normal operation of the dofier cylinder has been interrupted and the normal feeding of fibers into and out of the card has been interrupted, but the main cylinder continues to rotate at normal operating speed comprising directing a stream of air against the surface of the rotating main cylinder at a location forwardly of the point of tangency of the main and doffer cylinders with respect to the direction of rotation thereof to move the textile fibers carried by the main cylinder deeper into the card clothing thereon while confining the air stream within a closed space communicating with the surface of the main cylinder from said point forwardly of the point of tangency of the main and dofier cylinders to a point closely adjacent to the point of tangency to increase the pressure on the portion of the main cylinder with which the space communicates to maintain the textile fibers at the greater depth within the card clothing and varying the steam of air in inverse proportion to the speed of the doffer cylinder so that the transfer of fiber
  • a method of operating a textile card to retain textile fibers on a rotating main cylinder during such periods when the adjacent doffer cylinder is stopped comprising the steps of registering the absence of rotation of the doffer cylinder, and in response thereto directing a stream of air onto the surface of the main cylinder for substantially the full width thereof at a point forwardly of the closest point of proximity of the main cylinder to the doffer cylinder with respect to the direction of rotation thereof to exert a force on the fibers carried thereby in a direction to retain these fibers on the main cylinder and thus to prevent the transfer of fibers from the main cylinder onto the doffer cylinder when the doffer cylinder is not rotating.

Description

Dem 28. 1955 J. R. WHITEHURST 3,225,391
FIBER TRANSFER CDNTROLLING APPARATUS AND IETHOD FOR IAIN CYLINDER OF A CARD Filed July 20, 1962 4 Sheets-Shoat 1 SOURCE- YNVENTOR. Joe- E. \Nuwenuasr ATTORNEYS Dec. 28. 1 J. R. WHITEHURST FIBER TRANSFER CONTROLLING APPARATUS AND METHOD FOR MAIN CYLINDER OF A CARD 4 Sheets-Sheet 2 Filed July 20, 1962 INVENTOR. Joe- R. WmTE-Husas'r A TTORNE Y6 Dec. 2 1965 J. R. WHITEHURST 3,225,391
FIBER TRANSFER CONTROLLING APPARATUS AND METHOD FOR MAIN CYLINDER OF A CARD Filed y 2 4 Sheets-Sheet 5 INVENTOR; J0E- E. WHH'EHLIRST nfi M MW A 7' TOR/VE Y5 Dec. 28, 1 J. R. WHITEHURST FIBER TRANSFER CONTROLLING APPARATUS AND METHOD FOR MAIN CYLINDER OF A CARD 4 Sheets-Sheet 4.
Filed July 20, 1962 INVENTOR. JOE R. WHITEHUR$T T MAA4W ATTORNE Y5 United States Patent 3,225,391 FIBER TRANSFER CONTROLLING APPARATUS AND METHOD FOR MAIN CYLTNDER OF A CARD Joe R. Whitehurst, Bessemer City, N.C., assignor to Ideal Industries, Inc., Bessemer City, N.C., a corporation of North Carolina Filed July 20, 1962, Ser. No. 211,241 13 Claims. (Cl. 1998) The present invention relates to carding machines, and more particularly to an apparatus and method for preventing the accumulation or build-up of fibers on the doifer cylinder of such carding machine when the same is not rotating.
In a conventional carding machine, there is normally provided a rotatable large main cylinder having clothing comprising many thousand closely spaced wires extending outwardly from the outer surface of the main cylinder. A lap of textile fibers is fed by a pair of lap feed rolls to a licker-in which opens the lap to some extent into clumps of fibers. These clumps of fibers are transferred from the licker-in to the main cylinder. The clothing on the main cylinder carries the clumps of fibers forwardly as the main cylinder rotates and cooperates to further open the clumps of fibers with similar clothing carried by a plurality of revolving flats which move in close proximity to the surface of the main cylinder and in the same direction, but at a slower speed.
A doffer cylinder is disposed on the opposite side of the main cylinder from the licker-in and is positioned closely adjacent thereto. The dofifer cylinder has clothing thereon similar to the main cylinder which passes in close proximity to the clothing of the main cylinder. At the point of closest proximity the clothing on the dolfer cylinder travels in the same linear direction as the clothing on the main cylinder but at a slower speed. The fibers are therefore further opened into a thin web and the majority of the textile fibers are removed from the clothing of the main cylinder by the doffer clothing to eifect transference of the fibers. The fibers are subsequently removed from the doifer cylinder in the form of a web which is normally condensed into sliver form which in turn is normally coiled in a suitable receptacle.
When the operation of conventional carding machines is terminated, it is the normal practice to stop the lap feed rolls and dofter cylinder and to maintain the main cylinder and licker-in rotating. This is accomplished by providing a drive system for the carding machines in which the drive to the doffer cylinder and lap feed rolls may be terminated and started at will without interrupting the drive to the main cylinder. It is noted that the dofier cylinder has a period of deceleration when the drive thereto is terminated before the doifer cylinder reaches a full stop and a period of acceleration when the drive thereto is started before the doffer cylinder reaches normal operating speed. Since the main cylinder is rotating at a constant speed, i.e., many times the speed of the doflfer cylinder in normal operation, it can readily be appreciated that when the speed of the dofier cylinder is reduced during the deceleration and acceleration periods or completely stopped that the amount of fibers on the dotfer cylinder will be increased. This build-up or greater accumulation of textile fibers increases as the speed of the doifer cylinder decreases and is therefore greatest when the doffer cylinder is completely stopped. Further, the build-up or accumulation of fibers decrease as the speed of the dotfer cylinder increases during the acceleration period.
This greater accumulation of fibers travels around the doffer cylinder and is removed there-from with the web 3,225,391 Patented Dec. 28, 1965 "ice which results in a considerably thickened place therein. The extraweight of this thickened portion normally results in breaking of the web and consequently, disruption of the sliver. The operator of the card is therefore required to piece up the sliver causing considerable waste of time and production as well as unevenness in the sliver produced. Furthermore, the portion of the web with the thickened portion therein has to be removed prior to the piece up and is then relegated to waste.
Even if the web is not broken, the thickened portion causes an abnormal enlargement in the resulting sliver. This abnormal enlargement causes problems in the further processing of the sliver into the desired size yarn and can even disrupt further processing.
Heretofore, no means has been provided for preventing this greater accumulation of fibers on the doifer cylinder when the normal operation thereof is interrupted. The prior practice has been to accept this accumulation of fibers and the consequential broken web and uneven places in the sliver or the abnormal enlargements and their resulting problems.
To achieve a uniform sliver by obviating the aforementioned problems, the present invention contemplates controlling the transfer of fibers from the main cylinder to the dotfer cylinder in such a manner to maintain substantially the same amount of fibers on the doffer cylinder during the period when normal operation thereof is interrupted as the amount of fibers thereon during normal operation thereof. In this regard, the present invention contemplates reducing the amount of fibers transferred onto the doffer cylinder in direct proportion to the deceleration thereof during the period of such deceleration, preventing the transfer of fibers thereto during the period when the doffer cylinder is not rotating, and increasing the transfer of fibers in direct proportion to the acceleration of the dotier cylinder during the period of such acceleration.
It is therefore an object of the present invention to provide an apparatus and method for a carding machine wherein the transfer of fibers from the rotating main cylinder to the doifer cylinder is controlled during the period when the normal operation of the doffer cylinder is interrupted to prevent breaking or unevenness in the web and sliver removed from the doifer cylinder.
A further object of the present invention is to provide an apparatus and method for a carding machine Wherein the transfer of fibers from the rotating main cylinder to the doffer cylinder is reduced in direct proportion to deceleration of the dotfer cylinder when the normal operation thereof is interrupted.
A more specific object of the present invention is to provide an apparatus and method of the character last described wherein transfer of fibers from the main cylinder to the dolfer cylinder is prevented when the doffer cylinder is not rotating, and wherein the transfer of fibers from the main cylinder to the doffer cylinder is increased in direct proportion to acceleration of the doifer cylinder when the same is started rotating again.
A still more specific object of the present invention is to provide means disposed adjacent to the point of tangency of the main and doffer cylinders and which is operable when the dolfer cylinder is stopped to direct a stream of air into the surface of the main cylinder for substantially the full width thereof and in a direction to exert a centripetal force on the textile fibers carried thereby having at least a component directed inwardly toward the axis of the main cylinder to retain the fibers on the main cylinder so that the same will pass by the doffer cylinder without being cast thereon.
A further more specific object of the present invention is to provide means of the character last described which main cylinder 21 (FIGURES 3 and is adjustable to vary the retaining force exerted on the fibers on the main cylinder for maintaining these fibers on the main cylinder and thus to prevent transfer thereof onto the doffer cylinder.
A still further more specific object of the present invention is to provide a chamber disposed forwardly of the point of tangency of the main and dolfer cylinders with respect to the direction of rotation thereof and communicating with the surface of the main cylinder through at least one elongate restricted opening for directing a stream of air onto the surface of the main cylinder in a direction to force the fibers carried thereby deeper into the card clothing thereon so that the fibers are retained on the main cylinder as they are carried past the doffer cylinder, the walls defining the opening extending inwardly toward the main cylinder at a downward acute angle relative to the horizontal or in the general direction of the point of tangency of said main and doifer cylinders to prevent fibers from being cast off the main cylinder and through the opening into the chamber when air is not being directed therethrough.
Another object of the present invention is to provide a method of preventing build-up or accumulations of textile fibers on the doffer cylinder of a carding machine when the doifer cylinder is not rotating and the main cylinder thereof is still rotating wherein air currents are directed against the main cylinder adjacent the point of tangency of said main and dofier cylinders to cause the fibers carried by said main cylinder to be forced into the clothing of the main cylinder until the fibers have been carried past the doifer cylinder.
Some of the objects of the invention having been stated, other objects will appear as the description proceeds, when taken in connection with the accompanying drawings, in which FIGURE 1 is a perspective view of a carding machine embodying the apparatus of the present invention;
FIGURE 2 is an enlarged fragmentary vertical section of the medial portion of the apparatus shown in FIGURE 1 and showing portions of the main cylinder and doffer cylinder of the carding machine with the apparatus of the present invention associated therewith;
FIGURE 3 is an isometric view with portions broken away of the apparatus of the present invention shown in FIGURE 2;
FIGURE 4 is an enlarged fragmentary section taken substantially along line 4-4 in FIGURE 3;
FIGURE 5 is a fragmentary section similar to FIG- URE 2 showing another embodiment of the apparatus of the present invention;
FIGURE 6 is an isometric view similar to FIGURE 3 of the apparatus shown in FIGURE 5;
FIGURE 7 is an enlarged fragmentary section taken substantially along line 7--7 in FIGURE 6;
FIGURE 8 is an end elevation of a portion of the main cylinder of a carding machine with still another embodiment of the apparatus of the present invention associated therewith;
FIGURE 9 is an enlarged vertical section of the apparatus shown in FIGURE 8;
FIGURE 10 is an isometric view of one end portion of the apparatus shown in FIGURE 8 with portions broken away; and
FIGURE 11 is a schematic View of the apparatus of the present invention showing the mechanism for controlling the same.
Referring now to the drawings and more particularly to FIGURE 1, there is shown a carding machine generally indicated at which includes a norm-ally rotating Main cylinder 21 has clothing 22 (FIGURES 3 and 5) thereon Which comprises many thousand closely spaced Wires upstanding from and substantially covering the outer surface of the main cylinder. A licker-in 23 (FIGURE 1) is disposed adjacent main cylinder 21 at the reaward side thereof and a pair of feed rolls (not shown) is disposed adjacent licker-in 23 to feed a lap L of textile fibers to licker-in 23 which opens the lap into clumps and feeds these clumps to main cylinder 21. Main cylinder 21 cooperates with a plurality of revolving flats 24 which are positioned over main cylinder 21 and in close proximity thereto. Revolving flats 24 likewise have clothing thereon (not shown) which moves in the same direction as clothing 22 but at a slower speed so that the clothing on flats 24 cooperates with clothing 22 on main cylinder 21 to further open the clumps of textile fibers to clean the textile fibers as is well known in this type of machine.
A doifer cylinder 25 (FIGURES 3 and 5) is disposed closely adjacent to main cylinder 21 at the forward side thereof and has clothing 26 thereon. Main cylinder 21 and doifer cylinder 25 cooperate to define a point of tangency where clothing 26 on doffer cylinder 25 passes in close proximity to clothing '22 on main cylinder 21. Doffer cylinder 25 rotates at a slower speed than main cylinder 21 and in the opposite angular direction so that clothing 26 is traveling in the same linear direction as but at a slower speed than clothing 22. Clothing 22 and 26 cooperate to further open the textile fibers and doifer cylinder 25 removes the textile fibers from main cylinder 21 and carries the same around therebeneath to a point at the forward side thereof where the same are removed by a doffer comb 27 (FIGURE 1) of conventional construction.
The web W removed by comb 27 is directed through a trumpet (not shown) which condenses the web into a sliver S. A pair of calender rolls 30 are positioned on the opposite side of the trumpet from comb 27 and receive the sliver there-between. Calender rolls 30 serve to draw the web of textile fibers through the trumpet and to deliver the sliver S to a coiler head 31. Coile-r head 31 coils the sliver S within a suitable receptacleor sliver can 32. It is noted that coiler head 31 preferably includes a conventional stop motion (not shown) which will serve to stop the carding machine 20 when the sliver S or the web W breaks.
The operating elements of a carding machine are conventionally driven in several different manners and the following description is of a typical drive for a carding machine of this type. The main cylinder 21 is driven from an overhead line shaft (not shown) by a belt (also not shown) which is supported at its lower end by fast and loose pulleys 33, 34, respectively, (FIGURE 1). Fast pulley 33 is drivingly mounted on shaft 35 of main cylinder 21 and loose pulley 34 is mounted on shaft 35 for free rotation relative thereto. The drive belt is shiftable between fast pulley 33 and loose pulley 34 to control the rotation of main cylinder 21. Licker-in 23 is driven from shaft 35 of main cylinder 21 by a belt and pulley arrangement (not shown).
A :drive pulley 36 is mounted on the shaft of licker-in 23 for rotation therewith and drivingly supports one end of a belt 37. The other end of belt 37 is supported by a pulley 40 mounted on a stub shaft 41. Stub shaft 41 is ournaled for rotation on a control lever 42 which is mounted for pivotal movement about a pivot pin 43. A pinion gear 44 (FIGURE 11), is mounted on shaft 41 for rotation therewith and is movable into driving engagement with a gear 45. Pivot pin 43 is adjustably mounted on the frame of carding machine 26 to vary the distance which gear 44 must move to mesh with gear 45. Gear 45 1s drivingly mounted on shaft 46 of doflFer cylinder 25 and also serves to drive a first intermediate gear 47 mounted in meshing relationship therewith. A second intermediate gear 48 is disposed in meshing relationship with first intermediate gear 47 and with a gear 59 mounted on shaft 51 of lower calender roll 30. It is noted that upper calender roll 30 is an idler roll mounted for free rotation and is driven by frictional contact with lower calender roll 30. The coiler head 31 is driven from shaft 51 of lower calender roll 30 and comb 27 is driven from main cylinder 21 in a manner not shown. The lap feed rolls are driven from shaft 46 of doffer cylinder 25 in a manner also not shown, but in a manner which is conventional.
An operating handle 52 is pivotally mounted at the front of carding machine 29 and includes a cam portion 53 which is disposed beneath the forward end of control lever 42 such that when operating handle 52 is moved clockwise about its pivot, cam portion 53 will raise control lever 42 in a counterclockwise direction around pivot 43. This will move gear 44 into meshing relation with gear and will thereby cause dotfer cylinder 25, the lap feed rolls, calender rolls 30, comb 27 and coiler head 31 to be operated.
The surface of main cylinder 21 between the forward end of revolving flats 24 and a point closely adjacent to the point of tangency of main card cylinder 21 and doifer cylinder 25 is covered by a front plate 54 to prevent the casting ofi of fibers from main cylinder 21 and to protect the fibers from harmful air currents. Front plate 54 is formed in three sections, i.e., upper, middle, and lower sections 54a, 54b and 540, respectively. The upper section 54a is adjustable relative to the surface of main cylinder 21 to control the amount of waste removed by revolving flats 24. The middle section 54b of front plate 54 comprises a door which allows access to the surface of main cylinder 21 for stripping and grinding purposes. The lower section 54c is also referred to as the make-up piece and is adjustable relative to the surface of main cylinder 21 for controlling the air currents generated by rotation of main cylinder 21. The upper surface of doffer cylinder 25 is enclosed by a casing 55 which engages lower section or make-up piece 54c at a point spaced from the point of tangency of the main and doffer cylinders, and thereby protects the dofier cylinder and prevents harmful air currents and the like from damaging any textile fibers thereon which have not been removed by comb 27.
The foregoing has been a description of a typical conventional carding machine of which there are many different types. Turning now to a description of the present invention and referring more specifically to FIGURES 1 through 4, a preferably cylindrical pipe is mounted on make-up piece 54c and extends for substantially the full length thereof and therefore for the full width of main cylinder 21. Pipe 60 has a portion of the wall thereof cut away along the chord of the are formed by this portion of the pipe. The thusly formed out edges are disposed in engagement with make-up piece 540 and pipe 60 is mounted on make-up piece 540 by any suitable means such as welding 61 to form an air tight seal. An elongate opening 62 is formed in the portion of make-up piece 54c between the cut edges of pipe 66 and communicates with the surface of main cylinder 21. It is noted that opening 62 is formed through make-up piece 540 at a downwardly extending angle relative to the horizontal, so that textile fibers will not be east through opening 62 into pipe 69.
It is noted that opening 62 is of a length substantially the same as the Width of clothing 22 on main cylinder 21 and that pipe 60 serves to reinforce make-up piece 54c which has been weakened somewhat by the formation of opening 62 therethrough. A pair of fluid supply lines 63 are connected at one end to each of pipe 69 and communicate with the interior thereof. Opposite ends of fluid supply lines 63 are connected by a T-type connection 64 to one end of a main fluid supply line 65. Main line 65 has a valve 66, preferably of the butterfly type, but which may be of any suitable construction, disposed therein to control the flow of fluid therethrough. The other end of main supply line 65 is connected to a valve regulator 67 which controls the pressure applied to valve 66 to insure that a constant pressure is maintained in main supply line 65 on the opposite side of valve 66 from pipe 60. The other side of valve regulator 67 is connected by a fluid supply line 70 to a suitable fluid pressure source 6 71 such as an air compressor or the like which is indicated schematically in FIGURE 11.
Valve 66 is mounted for pivotal movement from a closed position which does not allow any fluid flow in main supply line 65 to an open position which allows maximum fluid flow in line 65 by an actuating arm 72 which penetrates through a hearing 73 mounted in supply line 65. The outer end of actuating arm 72 is formed into a crank portion 72:: to which one end of a connecting link 74 is pivotally connected. The other end of connecting link 74 is pivotally connected to the upper end of a slide bar 75. Slide bar 75 is mounted for vertical reciprocatory movement in a pair of spaced bearings 76. A connecting bar 77 is fixedly connected at one end to slide bar 75 intermediate the bearings 76 and has a collar portion 77a at the other end thereof.
A governor 80 controls valve 66 and includes a first collar 81 mounted on one end of a shaft 82 for rotation therewith. A plurality of brackets 83 are mounted on first collar 81 and have the upper ends of a plurality of upper links 34 mounted thereon for rotation with collar 81. A plurality of lower links 85 are pivotally mounted at their upper ends on the lower ends of upper links 84 by pivot pins 86. Pins 86 have opposite ends thereof weighted to provide centrifugal force as the same rotate with shaft 82 to cause upper links 84 to pivot upwardly and outwardly on collar 81. The lower ends of lower links 85 are pivotally connected to a second or lower collar 87 which is loosely mounted on shaft 82 for reciprocatory movement therealong.
Lower collar 37 is also weighted to cause the same to readily move downwardly as rotation of shaft 82 decreases. Lower collar 87 has an annular groove in the outer surface thereof which loosely receives collar portion 77a of connecting bar 77 for reciprocatory movement therewith. It is noted that the loose mounting of collar portion 77a allows lower collar 87 to rotate therein.
The lower end of shaft 82 is journaled for rotation in a bearing 90 which may be mounted at a convenient place on the frame of the carding machine. A variable V- pulley 91 is drivingly mounted on shaft 82 and includes a first half portion 92 drivingly mounted on shaft 82 by a key 93 cooperating with alined grooves in the first portion 92 of pulley 91 and shaft 82. First portion 92 has a hub 94 thereon which is externally threaded and matingly receives the internally threaded hub 95 of second half portion 96 of pulley 91. Rotation of second half portion 96 relative to first half portion 92 moves second half portion 96 toward or away from first half portion 92 to vary the effective diameter of pulley 91 to vary the speed at which shaft 82 is driven. A lock nut 97 is also mounted on hub 94 to lock second half portion 96 in adjusted position.
A V-belt 98 is supported at one end by pulley 91 and at the other end by a drive pulley 99. Drive pulley 99 is mounted on shaft 46 of doffer cylinder 25 for rotation therewith and hence governor 86 registers or is responsive to the speed of rotation of dofler cylinder 25 or the absence of such speed and controls valve 66 accordingly. It is noted that while the above-described structure for controlling valve 66 in response to the speed of dofler cylinder 25 is preferred, any suitable speed responsive or speed registering means may be used without departing from the spirit of the instant invention.
Referring now to FIGURES 5 through 7 wherein another embodiment of the apparatus of the present invention is shown, and wherein like reference characters are used to designate like parts, a pipe 109 of substantially the same construction as pipe 60 is mounted on the middle section or access door 54b of front plate 54 by any suitable means such as welding 161. As was the case with pipe 60, a portion of the wall of pipe 100 is cut away along the chord of the arc defined thereby and the cut edges are positioned in engagement with access door 54b.
It is noted that access door 54b serves to close the opening formed by the cutting away of this portion and welding 101 forms an air tight seal.
A plurality of spaced, elongate openings 102 are formed in the portion of access door 54b disposed between the cut edges of pipe 160 and are disposed in two parallel rows. It is noted that the elongate openings 102 in one of said rows are staggered relative to the elongate openings of the other row and each of the openings in each of said rows is of sufficient length to span the space between the adjacent pair of openings in the other row. Thusly, the openings 102 will direct a stream of air against the surface of main cylinder 21 throughout the width thereof.
Pipe 100 is connected to a fluid pressure source (not shown) in the same manner as pipe 66 by a pair of fluid supply lines 163 communicating with opposite ends thereof and the application of fluid thereto is controlled in substantially the same manner as with pipe 60. As was the case with opening 62, openings 162 are formed in the access door 54b at a downwardly extending angle relative to the horizontal to prevent textile fibers from being cast off of main cylinder 21 through openings 1 12 into the pipe 100.
Referring now to FIGURES 8 through 10, wherein there is shown still another embodiment of the present invention, and wherein like reference characters are used to designate like parts, a first pipe 110 is mounted in spaced brackets 111 which are in turn mounted on access door 5412 by bolts 112. Preferably, brackets 111 are formed of hard fibrous material or of suitable plastic material. However, it is contemplated that any suitable bracket may be used. Pipe 11% is preferably constructed of a suitable transparent plastic material such that an operator of the carding machine may view the interior of pipe 110.
Access door 54b has an elongate opening 113 formed therein of a length substantially the same as the width of main cylinder 21 and the portions of access door 54b defining the side walls of opening 113 and the portions adjacent thereto are milled to :provide a concave arc-uate seat for pipe 110 with the milled portions having the same radius as the outer radius of pipe 110. The points of engagement of pipe 110 with access door 5% are preferably caulked as indicated at 114 to provide an air tight seal.
An elongate opening 115 is formed in the portion of pipe 110 disposed in elongate opening 113 such that the interior of pipe 116 communicates therethrough with the outer surface of main cylinder 21. tions of pipe 110 are provided with slits 116 therein to provide a split portion at each end which split portions are surrounded by split clamps 117 having screws 118 connecting the opposite ends thereof for providing a compressive clamping force to the split portions of pipe 110.
A second pipe 121) is mounted within pipe 110 and extends therethrough. Pipe 120 is likewise preferably constructed of a transparent plastic material such that the operator may view the interior thereof. Pipe 12%) has an elongate opening 121 formed therein of a length substantially the same as the width of main cylinder 21. Opening 121 is preferably formed in an area of pipe 120 corresponding to the area of pipe 110 in which opening 115 is formed such that openings 115 and 121 may be alined. Also, openings 115 and 121 are formed in pipes 110 and 120 at a downwardly extending angle relative to the horizontal as was the case with openings 62 and 102. Pipe 120 is mounted for rotation in pipe 110 and is clampingly held in adjusted position by clamps 117 and the split portions of pipe 110. It is to be noted that the degree of alinement of openings 115 and 121 determine the size of the effective opening which communicates with the surface of main cylinder 21 to thereby determine the velocity of the air currents being directed against main cylinder 21.
Opposite end pori The portions of pipe 120 closely adjacent to the ends of pipe 110 are preferably provided with suitable graduations as indicated at 123 which cooperate with a point 124 on the ends of pipe 110 to give a visual representation of the effective size of the opening communicating with main cylinder 21 as determined by the relative alinement of openings 115 and 12 1. Also, it is noted that the transparent character of pipes 110 and 120 allows the operator to visually monitor the relative alinement of openings 115 and 121. Fluid supply lines 124, only one of which is shown, are connected to opposite ends of pipe 120 and serve to deliver fluid under pressure thereto from a suitable fluid source as was the case in the previously described embodiments.
In operation, when the normal operation of the carding machine 26 is desired to be interrupted, the operator lifts upwardly on operating handle 52 which allows the control lever 42 to move downwardly about pivot pin 43. This downward movement of control lever 42 moves pinion gear 44 out of meshing relationship with gear thereby terminating the drive to doffer cylinder 25.
It is noted that while dotfer cylinder 25 is rotating at normal operating speed, shaft 46 thereof drives pulley 99 which in turn drives pulley 91 by V-belt 98. Pulley 91 drives shaft 82 which rotates governor 80 and governor 80 thereby registers the speed of rotation of doifer cylinder 25. The effective diameter of pulley 91 is adjusted in the manner aforementioned by adjusting second portion 96 relative to first portion 92 to adjust the speed of shaft 82 to rotate governor 80 sufliciently fast to cause weighted pins 86 to cause upper links 84 to move upwardly and outwardly and to thereby raise lower collar 87 through lower links 85. Lower collar 87 raises connecting bar 77 therewith which in turn raises slide bar 75 in bearings 76. Slide bar 75 rotates crank portion 72a of actuating arm 72 through connecting link 74 to move valve 66 to the closed position to prevent flow of fluid to pipe 6% through main supply line and lines 63.
When normal operation of dolfer cylinder 25 is interrupted in the manner aforementioned, dolfer cylinder 25 decelerates from normal operating speed to a full or complete stop. As doffer cylinder 25 decelerates, the rotation of shaft 82 decreases and thereby the speed of rotation of governor 80 is decreased. Therefore, lower collar 37 moves downwardly a distance proportionate to the decrease in speed which moves slide bar downwardly and opens valve 66 a proportional amount. This allows air to flow through main supply line 65 to lines 63 and thence to pipe 60. It is noted that this flow of air is directly proportional to the opening of valve 66 which, as aforementioned, is inversely proportional to the speed of doifer cylinder 25.
The air escapes from pipe 60 through opening 62 and is directed thereby onto the surface of the main cylinder in a direction to exert a force on the textile fibers carried by the main cylinder having at least a component thereof directed inwardly toward the axis of the main cylinder to tend to move these fibers deeper into clothing 22. Since the transfer of fibers from the main cylinder to the doifer cylinder is caused, at least in part, by centrifugal force caused by the rotation of the main cylinder, this transfer of fibers may be controlled by varying the force exerted on the fibers inwardly toward the axis of the main cylinder by varying the air stream escaping from the opening 62. Therefore, the transfer of fibers from the main cylinder to the doffer cylinder is decreased in direct proportion to the deceleration of doifer cylinder 25 since the flow of air from opening 62 is increased as dofier cylinder 25 decelerates.
When doffer cylinder 25 is completely stopped, valve 66 is opened to such a degree that flow of air from opening 62 is of sufficient force to prevent the transfer of any textile fibers from the main cylinder to the doifer cylinder. When doffer cylinder 25 is started rotating again, the procedureis reversed and the flow of air from opening 9 62 is decreased in proportion to the acceleration of dotfer cylinder 25 so that the transfer of fibers from the main cylinder to the doffer cylinder is increased in direct proportion thereto.
It is noted that make-up piece 54c in the embodiment shown in FIGURES 2 through 4, and make-up piece 540 and access door 54b of the other embodiments cooperate with the surface of main cylinder 21 to define a closed space which will confine the air directed onto the surface of main cylinder 21 and pressure will therefore be built up therein. This increased pressure will serve to maintain the fibers in the spaces between the wires of clothing 22 until the same have passed by the point of tangency of the main and dolfer cylinders. It is noted that the speed of main cylinder 21 is such that centrifugal force will cause the fibers to move outwardly to the surface of clothing 22 after the same have passed the point of tangency of the main and doffer cylinders.
When valve 66 is closed and the air stream is not being directed onto the surface of the main cylinder, the angle at which openings 62, 102, 115 and 121 are formed in make-up piece 540, access door 54b and pipes 114 and 120, respectively, relative to the horizontal prevents the casting off of fibers from main cylinder 21 through the openings into the pipes 60, 100 and 121?. In this regard, since the elongate openings 115 and 121 are preferably considerably wider than the elongate openings 62 and 102, the angle thereof relative to the horizontal should be greater. Also, the transparency of pipes 111 and 120 allows the operator to visually monitor the operation thereof to determine when fibers are being cast into pipe 120. When this occurs, pipe 120 may be rotated within pipe 119 to reduce the effective opening between main cylinder 21 and the interior of pipe 120 to prevent this condition from occurring. Also, pipe 120 may be rotated Within pipe 110 to vary the velocity of the air stream passing through openings 115 and 121 to thereby vary the force applied to the fibers inwardly toward the axis of the main cylinder and hence the depth at which the fibers are forced into the spaces between the wires of clothing 22.
While the present invention has been described in association with a single card, i.e., a card having only one main cylinder and a doffer cylinder, it is to be understood that the present invention may be associated with cards of other types without departing from the spirit of the present invention. In this regard, tandem cards, i.e., cards having two main cylinders arranged in tandem with at least one transfer cylinder therebetween and a doffer cylinder on the outlet side of the second main cylinder, are now being used extensively in the industry. Since a considerably larger amount of textile fibers are disposed on the main cylinders of these tandem cards at any given time, the problem of build-up or accumulation of fibers on the doffer cylinder when the normal operation thereof is interrupted is more acute in tandem cards and the present invention therefore has particular application thereto. It is recognized that some modifications in the structure of the present invention and in the manner of controlling the same will be required to render the same applicable to the varying situations and problems encountered in the operation of varying type cards, including tandem cards, and it should be understood that the same may be made without departing from the spirit of the instant invention.
It will therefore be apparent that a novel apparatus and method for preventing increased build-up or accumulation of fibers on the surface of the doffer cylinder when the normal operation thereof is interrupted is provided wherein the transfer of fibers is controlled by applying a varying force thereto in a direction to maintain the fibers on the surface of the clothing on the main cylinder in varying amounts so that the amount of fibers transferred from the main cylinder onto the doifer cylinder is directly proportional to the speed of the doffer cylinder.
In the drawings and specification there has been set forth a preferred embodiment of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being defined in the claims.
I claim:
1. In a machine for carding textile fibers, said carding machine having a rotatable main cylinder, a rotatable differ cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, said main cylinder having clothing thereon, drive means for rotating said main and dot-fer cylinders, and control means operable to interrupt the drive to said doffer cylinder without interrupting the drive to said main cylinder to stop the rotation of said doifer cylinder while the rotation of said main cylinder is continued; the combination of force exerting means operatively associated with said main cylinder forwardly of the point of tangency of said main and dotfer cylinders relative to the direction of rotation thereof for exerting a force on the textile fibers carried by said main cylinder in a direction to retain these fibers on the main cylinder, and means operatively associated with said doffer cylinder and responsive to the absence of rotation thereof upon interruption of the drive thereto for actuating said force exerting means to prevent the transfer of fibers from the main cylinder onto the doifer cylinder when the doffer cylinder is not rotating.
2. The structure set forth in claim 1 wherein said force exerting means includes means communicating with the surface of said main cylinder and extending for substantially the full width thereof for directing an air stream onto the surface of said main cylinder to force any textile fibers carried thereby deeper into the clothing thereon.
3. In a machine for carding textile fibers, said carding machine having a rotatable main cylinder and a rotatable doffer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, said main cylinder having clothing thereon, drive means for rotating said main and doffer cylinders, and control means operable to interrupt the drive to said doffer cylinder without interrupting the drive to said main cylinder to stop the doffer cylinder while the rotation of said main cylinder is continued; the combination of means operatively associated with said main cylinder forwardly of the point of tangency of said main and doflfer cylinders with respect to the direction of rotation of the main cylinder and responsive to the absence of rotation of said doft'er cylinder for directing a stream of air onto the surface of said main cylinder for substantially the full width thereof to exert a force on the textile fibers carried by the main cylinder in a direction to retain these fibers on the main cylinder and prevent transfer thereof onto the doifer cylinder, and said air directing means including means to adjustably vary the velocity of the air stream to thus vary the retaining force exerted on the textile fibers carried by the main cylinder.
4. In a carding machine for textile fibers, said carding machine having a rotatable main cylinder, a rotatable dofi'er cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to the doffer cylinder at the point of tangency between said main and dolfer cylinders during rotation of said main and doifer cylinders, drive means for rotating said main and doifer cylinders, and selectively operable control means for interrupting the drive to said doffer cylinder to stop normal rotation thereof and for restarting the drive to said doffer cylinder for returning the same to normal rotation; the combination of means opertively associated with said main cylinder forwardly of the point of tangency of said main and dofier cylinders with respect to the direction of rotation of said main cylinder and responsive to the speed of rotation of said dofler cylinder for varying the transfer of fibers from said main 1 1 cylinder to said doifer cylinder in direct proportion-to the speed of rotation of the doffer cylinder to insure that a. substantially uniform mass of fibers is present on the doifer cylinder irrespective of its speed of rotation.
5. In a carding machine for textile fibers, said carding machine having a rotatable main cylinder, a rotatable doifer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being trans ferred to the doffer cylinder at the point of tangency of said main and dofler cylinders during rotation thereof, drive means for rotating said main and dotfer cylinders, and selectively operable control means for interrupting the drive to said dotfer cylinder to stop normal rotation of said dolfer cylinder so that the same decelerates to a full stop and for restarting the drive to said doifer cylinder so that the same accelerates to normal operating speed; the combination of means operatively associated with said main cylinder forwardly of the point of tangency of said main and doffer cylinders with respect to the direction of rotation of said main cylinder and responsive to the speed of rotation of said dotfer cylinder for exerting an increasing retaining force on the fibers carried by the main cylinder as the doffer cylinder decelerates to decrease the transfer of fibers from said main cylinder to said doifer cylinder, for exerting a substantially constant retaining force on the fibers carried by the main cylinder when the doffer cylinder is stopped to prevent the transfer of fibers from the main cylinder to the doffer cylinder, and for exerting a decreasing retaining force on the fibers carried by the main cylinder as the doffer cylinder accelerates to normal operating speed to permit increased transfer of fibers from the main cylinder to the doifer cylinder to insure that a substantially uniform mass of fibers is present on the doifer cylinder irrespective of its speed of rotation.
6. In a carding machine for textile fibers, said carding machine having a rotatable main cylinder, a rotatable doffer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to said dofifer cylinder at the point of tangency thereof, drive means for rotating said main and doflFer cylinders, and selectively operable control means for stopping the drive to said doifer cylinder to interrupt normal operation thereof and for restarting the drive to said doifer cylinder to resume normal operation thereof; the combination of an elongate chamber extending across said main cylinder for substantially the full width thereof and communicating with the surface of the main cylinder at a point forwardly of the point of tangency of said main and doffer cylinders with respect to the direction of rotation of said main cylinder, means communicating with said chamber for supplying air under pressure thereto which is directed by said chamber onto the surface of the main cylinder in a direction to exert a retaining force on the textile fibers carried by the main cylinder, and variable means responsive to the speed of rotation of said doifer cylinder and operatively associated with said air supplying means for varying the flow of air to said chamber in inverse proportion to the speed of the doifer cylinder to vary the transfer of fibers from said main cylinder to said dofi'er cylinder in direct proportion to the speed of rotation of the doffer cylinder to insure that a substantially uniform mass of textile fibers is present on the doffer cylinder irrespective of its speed of rotation.
7. In a carding machine for textile fibers, said carding machine having a rotatable main cylinder, a rotatable doifer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to said doifer cylinder at the point of tangency thereof, drive means for rotating said main and doffer cylinders, and selectively operable control means for stopping the drive to said dolfer cylinder to interrupt normal operation thereof and for restarting the drive to said doffer cylinder to resume normal operation thereof; the combination of an elongate plate mounted in juxtaposed relation to the surface of said main cylinder and being of a length substantially the same as the width of said main cylinder and of a width sufficient to cover the surface of the main cylinder from a point forwardly of the point of tangency of said main and doifer cylinders with respect to the direction of rotation thereof to a point closely adjacent to said point of tangency, a pipe mounted on said plate and extending for substantially the full length thereof and having a portion thereof disposed against said plate and an elongate opening in said portion thereof, said plate having at least one elongate opening therein which communicates with the interior of said pipe through the opening therein and with the surface of said main cylinder, said elongate opening in said plate extending inwardly toward said main cylinder at a downwardly directed acute angle relative to the horizontal and in the general direction of said point of tangency, means operatively connected to said pipe for supplying air under pressure to said pipe which escapes though said opening therein and through the opening in said plate and is directed thereby onto the surface of said main cylinder in a direction to exert a retaining force on the textile fibers carried by the main cylinder, the angular disposition of said opening in said plate preventing fibers from being cast from the main cylinder into said pipe through said openings when air is not being directed therethrough, said plate cooperating with the portion of the surface of said main cylinder covered thereby to define a substantially closed space which confines the air directed onto the surface of the main cylinder to increase the pressure within the space to continue the retaining force on the fibers to said point closely adjacent to said point of tangency, and variable means responsive to the speed of rotation of said doffer cylinder and operatively associated with said air supplying means for varying the flow of air to said pipe in inverse proportion to the speed of rotation of the doifer cylinder to vary the transfer of fibers from said main cylinder to said doffer cylinder in direct proportion to the speed of rotation of the doffer cylinder to insure a substantially uniform mass of fibers is present on the doffer cylinder irrespective of its speed of rotation.
8. The structure set forth in claim 7 wherein said plate has a pair of parallel rows of spaced elongate openings therein, the elongate openings of one of said rows being staggered relative to the elongate openings of the other row and of sufiicient length to span the space therebetween, said parallel rows cooperating to provide openings through which the interior of said pipe communicates with the surface of said main cylinder for substantially the full width thereof.
9. In a carding machine for textile fibers, said carding machine having a rotatable main cylinder, a rotatable doffer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to said dofier cylinder at the point of tangency thereof, drive means for rotating said main and doffer cylinders, and selectively operable control means for stopping the drive to said doifer cylinder to interrupt normal operation thereof and for restarting the drive'to said do]?- er cylinder to resume normal operation thereof; the combination of an elongate plate mounted in juxtaposed relation to the surface of said main cylinder and being of a length substantially the same as the width of said main cylinder and of a width sufficient to cover the surface of the main cylinder from a point forwardly of the point of tangency of said main and doifer cylinders with respect to the direction of rotation thereof to a point closely adjacent to said point of tangency, a pipe mounted on said plate and extending for substantially the full length thereof and having an elongate opening in the portion thereof disposed against said plate, said plate having an elongate restricted opening therein of a length substantially the same as the width of said main cylinder and which communicates with the interior of said pipe through the opening therein and with the surface of said main cylinder, means operatively connected to said pipe for supplying air under pressure to said pipe which escapes through said opening therein and through the opening in said plate and is directed thereby onto the surface of said main cylinder in a direction to exert a retaining force on the textile fibers carried by the main cylinder, said plate cooperating with the portion of the surface of said main cylinder covered thereby to define a substantially closed space which confines the air directed onto the surface of the main cylinder to increase the pressure within the space to continue the retaining force on the fibers to said point closely adjacent to said point of tangency, and variable means responsive to the speed of rotation of said doffer cylinder and operatively associated with said air supplying means for varying the flow of air to said pipe in inverse proportion to the speed of rotation of the doffer cylinder to vary the transfer of fibers from said main cylinder to said doffer cylinder in direct proportion to the speed of rotation of the doffer cylinder to insure a substantially uniform mass of fibers is present on the doffer cylinder irrespective of its speed of rotation.
10. In a carding machine for textile fibers, said carding machine having a rotatable main cylinder, a rotatable doffer cylinder disposed in close proximity to said main cylinder and defining therewith a point of tangency, the textile fibers carried by said main cylinder being transferred to said doffer cylinder at the point of tangency thereof, drive means for rotating said main and doffer cylinders, and selectively operable control means for stopping the drive to said doffer cylinder to interrupt normal operation thereof and for restarting the drive to said dolfer cylinder to resume normal operation thereof; the combination of an elongate plate mounted in juxtaposed relation to the surface of said main cylinder and being of a length substantially the same as the width of said main cylinder and of a width suflicient to cover the surface of the main cylinder from a point forwardly of the point of tangency of said main and doffer cylinders with respect to the direction of rotation thereof to a point closely adjacent thereto, said plate having an elongate opening therein of a length substantially the same as the width of said main cylinder, 21 first pipe mounted on said plate and extending for substantially the full length thereof with a portion thereof disposed in the opening in said plate, said first pipe having an elongate opening in the portion thereof disposed within the opening in said plate so that the interior of said first pipe communicates with the surface of the main cylinder, a second pipe disposed in said first pipe and being of a length greater than said first pipe, said second pipe having an elongate opening therein which is adapted to be alined with the opening in said first pipe so that the interior of said second pipe communicates with the surface of said main cylinder, said second pipe being mounted for limited rotation within said first pipe to vary the alinement of the opening in said second pipe with the opening in said first pipe, means operatively connected to said pipe for supplying air under pressure to said pipe which escapes through said opening therein and through the opening in said plate and is directed thereby onto the surface of said main cylinder in a direction to exert a retaining force on the textile fibers carried by the main cylinder, and variable means responsive to the speed of rotation of said doffer cylinder and operatively associated with said air supplying means for varying the fiow of air to said pipe in inverse proportion 14 to the speed of rotation of the doffer cylinder to vary the transfer of fibers from said main cylinder to said doffer cylinder in direct proportion to the speed of rotation of the doffer cylinder to insure a substantially uniform mass of fibers is present on the dofier cylinder irrespective of its speed of rotation.
11. A method of operating a textile card to control the transfer of fibers from a rotating main cylinder to an adjacent doffer cylinder during such periods of time when the normal operation of the doffer cylinder is interrupted, said method comprising directing a stream of air onto the surface of the main cylinder for substantially the full width thereof at a point forwardly of the closest point of proximity of the main cylinder to the doffer cylinder with respect to the direction of rotation thereof to exert a retaining force on the fibers carried by the main cylinder, and varying the stream of air in inverse proportion to the speed of rotation of the doffer cylinder to vary the transfer of fibers in direct proportion to the speed of rotation of the doffer cylinder.
12. A method of operating a card to control the transference of textile fibers from the main cylinder thereof onto the dofier when the normal operation of the dofier cylinder has been interrupted and the normal feeding of fibers into and out of the card has been interrupted, but the main cylinder continues to rotate at normal operating speed, said method comprising directing a stream of air against the surface of the rotating main cylinder at a location forwardly of the point of tangency of the main and doffer cylinders with respect to the direction of rotation thereof to move the textile fibers carried by the main cylinder deeper into the card clothing thereon while confining the air stream within a closed space communicating with the surface of the main cylinder from said point forwardly of the point of tangency of the main and dofier cylinders to a point closely adjacent to the point of tangency to increase the pressure on the portion of the main cylinder with which the space communicates to maintain the textile fibers at the greater depth within the card clothing and varying the steam of air in inverse proportion to the speed of the doffer cylinder so that the transfer of fibers is decreased as the speed of the doffer cylinder is decreased, the transfer of fibers is stopped when the doffer cylinder is not rotating, and the transfer of fibers is increased as the speed of the doffer is increased upon restarting thereof.
13. A method of operating a textile card to retain textile fibers on a rotating main cylinder during such periods when the adjacent doffer cylinder is stopped, said method comprising the steps of registering the absence of rotation of the doffer cylinder, and in response thereto directing a stream of air onto the surface of the main cylinder for substantially the full width thereof at a point forwardly of the closest point of proximity of the main cylinder to the doffer cylinder with respect to the direction of rotation thereof to exert a force on the fibers carried thereby in a direction to retain these fibers on the main cylinder and thus to prevent the transfer of fibers from the main cylinder onto the doffer cylinder when the doffer cylinder is not rotating.
References Cited by the Examiner FOREIGN PATENTS 2/1911 France. 4/ 1928 Great Britain.

Claims (1)

1. IN A MACHINE FOR CARDING TEXTILE FIBERS, SAID CARDING MACHINE HAVING A ROTATABLE MAIN CYLINDER, A ROTATABLE DIFFER CYLINDER DISPOSED IN CLOSE PROXIMITY TO SAID MAIN CYLINDER AND DEFINING THEREWITH A POINT OF TANGENCY, SAID MAIN CYLINDER HAVING CLOTHING THEREON, DRIVE MEANS FOR ROTATING SAID MAIN AND DOFFER CYLINDERS, AND CONTROL MEANS OPERABLE TO INTERRUPT THE DRIVE TO SAID DOFFER CYLINDER WITHOUT INTERRUPTING THE DRIVE TO SAID MAIN CYLINDER TO STOP THE ROTATION OF SAID DOFFER CYLINDER WHILE THE ROTATION OF SAID MAIN CYLINDER IS CONTINUED; THE COMBINATION OF FORCE EXERTING MEANS OPERATIVELY ASSOCIATED WITH SAID MAIN CYLINDER FORWARDLY OF THE POINT OF TANGENCY OF SAID MAIN AND DOFFER CYLINDERS RELATIVE TO THE DIRECTIONOF ROTATION THEREOF FOR EXERTING A FORCE ON THE TEXTILE FIBERS CARRIED BY SAID MAIN CYLINDER IN A DIRECTION TO RETAIN THESE FIBERS ON THE MAIN CYLINDER, AND MEANS OPERATIVELY ASSOCIATED TIWHT SAID DOFFER CYLINDER AND RESPONSIVE TO THE ABSENCE OF ROTATION THEREOF UPON INTERRUPTION OF THE DRIVE THERETO FOR ACTUATING SAID FORCE EXERTING MEANS TO PREVENT THE TRANSFER FO FIBERS FROM THE MAIN CYLINDER ONTO THE DOFFER CYLINDER WHEN THE DOFFER CYLINDER IS NOT ROTATING.
US211241A 1962-07-20 1962-07-20 Fiber transfer controlling apparatus and method for main cylinder of a card Expired - Lifetime US3225391A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327366A (en) * 1965-10-19 1967-06-27 Parks & Woolson Machine Co Apparatus for shearing fabrics
US5333357A (en) * 1993-06-04 1994-08-02 Duncan Richard N Carding machine having a fine-fiber brush

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR423609A (en) * 1910-12-09 1911-04-22 Fulgence Merelle Improvements to cards working with any textile or filament material
GB288057A (en) * 1927-06-09 1928-04-05 Giuseppe Fantazzini Improvements in or relating to devices for cleaning the cards of carding machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR423609A (en) * 1910-12-09 1911-04-22 Fulgence Merelle Improvements to cards working with any textile or filament material
GB288057A (en) * 1927-06-09 1928-04-05 Giuseppe Fantazzini Improvements in or relating to devices for cleaning the cards of carding machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327366A (en) * 1965-10-19 1967-06-27 Parks & Woolson Machine Co Apparatus for shearing fabrics
US5333357A (en) * 1993-06-04 1994-08-02 Duncan Richard N Carding machine having a fine-fiber brush

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Owner name: BARBER-COLMAN COMPANY, 1300 ROCK ST.ROCKFORD,IL.61

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Effective date: 19820729