US3289266A

US3289266A - Bobbin stripping and waste conditioning apparatus

Info

Publication number: US3289266A
Application number: US309653A
Authority: US
Inventors: Jr James L Brown; Ferguson Richard; Charles V Hinton
Original assignee: Terrell Machine Co
Current assignee: Terrell Machine Co
Priority date: 1963-09-18
Filing date: 1963-09-18
Publication date: 1966-12-06
Anticipated expiration: 1983-12-06

Description

Dec. 6, 1966 J, W JR ET AL 3,289,266

BOBBIN STRIPPING AND WASTE CONDITIONING APPARATUS 5 Sheets-Sheet 1 Filed Sept. 18, 1963 a I, s v W MZ M N .\h\ m mmmmf s 8 7 Ln NHQH K mm M liillll l 1.. f 2

Us m -N M ,1966 J. L. BROWN, JR, Em 3,289,266

BOBBIN STRIPPING AND WASTE CONDITIONING APPARATUS 5 Sheets-Sheet 2 Filed Sept. 18, 1965 1956 J. L. BROWN, JR, ET Al. 3,289,266

E CONDITIONING APPARATUS BOBBIN STRIPPING AND WAST 5 Sheets-Sheet 3 Filed Sept. 18, 1965 INVENTORS JAMCS L. EAOW/V, 179., 1 PIC/ 4RD P596060 6 BY CHARLES MI/IIVTON JTI'OIP Unite rates This invention relates to the stripping of waste roving from spent spinning room supply bobbins and to the conditioning and recovery of the waste roving for reuse, and provides an advantageously improved apparatus and method for accomplishing each purpose.

The apparatus and method of the present invention correspond generally to the method and means disclosed by copending application Serial No. 204,480, filed June 22, 1962, and now US. Patent No. 3,163,913, according to which the stripping is effected through nip forming means arranged to support and rotate the spent bobbins and operated so that the free end of the waste roving thereon is thrown loose centrifugally to enter the stripping nip for withdrawal in strand form from the bobbins and delivery to a drafting station where the stripped roving strands are subjected to a high speed loosening draft and then disrupted to the general condition of opened raw stock following such drafting.

For delivery of the waste roving from the nip forming means to the drafting station, this previously described arrangement depends additionally on centrifugal action to throw the roving strand free as it is stripped so that it may be caught and carried to the drafting station. Such an arrangement produces excellent results when cotton yarns are being handled, but experience with synthetic yarns has shown that the more pronounced static conditions generated by their handling make it extremely difficult to free the roving strands consistently from the nip forming means by centrifugal action alone. The effect of the static conditions is to increase the tendency of the roving strands to lap at the nip forming means to such an extent that centrifugal action cannot be counted on to prevail regularly and, as the nip forming means is fouled whenever a lap occurs, the stripping operation therefore becomes unsatisfactory from a practical standpoint.

The present invention obviates this ditiiculty by arranging the nip forming means so that a suction draft is imposed at its discharge side in a manner that not only serves to entrain stripped roving strands issuing therefrom but also acts to doctor the nip forming means effectively against lapping of the roving strands being stripped. It may be that the doctoring relation of the suction draft has the effect of discharging the troublesome static electricity so as to counteract the lapping tendency principally in that way, for it is static electricity without doubt that causes the lapping and the suction doctoring operates, in any event, to stop this lapping with exceptional effectiveness.

The entrained roving strands are caught and conveyed from the suction draft according to the present invention to a drafting station that is also substantially improved through an arrangement that comprises simply a holding nip with a pair of brush rolls set in direct drafting relation thereto for subjecting the delivered roving strands to a brushing disruption that conditions the waste roving excellently for reuse.

These and other features of the present invention are described at further length below in connection with the accompanying drawings, in which:

FIG. 1 is a side elevation indicating the general arrangement of apparatus embodying the present invention;

FIG. la is fragmentary and exaggerated detail showing atent O the form and relation of roll members constituting the nip forming means;

FIG. 2 is a somewhat schematic transverse detail taken substantially at the line 2-2 in FIG. 1, and illustrating the arrangement of the nip forming means from the entrance end;

FIG. 3 is a generally corresponding detail taken substantially at the line 33 in FIG. 1, and illustrating the arrangement at the discharge or delivery end of the suction chamber provided below the nip forming means;

FIG. 4 is a fragmentary side elevation detail of the sealing roll arrangement shown in FIG. 3;

FIG. 5 is a sectional detail of the drafting station provided according to the present invention; and

FIG. 6 is a corresponding side elevation detail of the FIG. 5 drafting station,

Referring now in detail to the drawings, spent roving bobbins B are fed serially through the apparatus of the present invention, from left to right as seen in FIG. 1, to have the waste roving R thereon stripped in strand form as indicated at S and delivered for drafting disruption so as to be recovered as reconditioned fiber as represented at F.

For this purpose, the apparatus comprises a suitable frame structure 10 carrying one or more sets of elongated nip forming rolls 11 and 12 (see FIG. 2) arranged to support the spent roving bobbins B thereon in relation to the nip that they form, and to rotate for receiving the free end of waste roving R from the bobbins B in this nip for stripping withdrawal therethrough in strand form as at S. The spent bobbins B are manually fed along the sets of stripping

rolls

11 and 12 from a feed table portion of the frame structure 10 at the left-hand position indicated by the reference numeral 10 in FIG. 1.

The rate of manual feeding is generally limited only by the operators ability to arrange the supply of spent bobbins B and push them onto the stripping rolls 11 and 12. When the spent bobbins B carry a normal amount of waste roving, a feeding rate of at least 60 bobbins per minute should be attained; Where block creeling practice results in spent bobbins B that often have several layers of waste roving R to be removed, the feeding rate must necessarily be slowed to allow time for rolling the greater amount of waste off, but in such a case the reconditioned recovery of this greater amount of waste that is provided for by the present invention becomes all the more significant.

Continued feeding of the spent bobbins B from the left in FIG. 1 causes the stripped bobbins to leave the stripping rolls 11 and 12 at the right Where they may be allowed to drop through directing chutes (not shown) to be picked up by a return conveyor, positioned as indicated at C in FIG. 1, and carried back past the operator so that any bobbins remaining incompletely stripped for some reason may be removed for reprocessing before the stripped ones are delivered to a bobbin cart or the like for return to the spinning operation.

The stripping rolls 11 and 12 have the general disposi tion of those disclosed in the previously noted copending application Serial No. 204,480, and are operated basically in the manner disclosed and claimed by US. Patent No. 3,072,997, granted January 15, 1963. That is, these

rolls

11 and 12 are caused to rotate in the direction indicated in FIG. 2 so that the nip they form has its entrance side adjacent the spent bobbins B supported thereon for receiving and withdrawing the waste roving R therefrom; and the speed of rotation is such as to cause rotation of the supported bobbins B at a relatively high surface speed so that the free end of the waste roving R is acted on centrifugally to throw it loose for entering the stripping.

Because the present invention additionally provides for aasaaee suction doctoring of the stripping rolls 11 and 12, as pre viously mentioned, they are somewhat differently formed in detail. To begin with, both of the stripping rolls 11 and 12 are provided as smooth steel rolls in the present instance, and are fitted with hardened end portions 11' and 12, which run in contact as indicated in FIG. 1a, and with spindle shanks 11" and 12" for journal mounting and driving connection.

Also, the body of stripping roll 11 preferably ha its surface relieved slightly below the diameter of its end portions 11', as FIG. la indicates with exaggeration. The actual surface relief is of the order of .005" to .007", and has the purpose of avoiding the severe mashing of the roving R during stripping that results from an unrelieved nip contact and that increased the troublesome tendency of the roving R to lap on one or the other of the stripping rolls 11 or 12. These rolls 11 and 12 must still, and will at the indicated order of relief, maintain an effective grip on the roving R to perform the stripping withdrawal from the bobbins B that is their purpose, but some surface relief very desirably eases the lapping tendency and should be employed.

Additionally, the surface relief of each stripping roll 11 provides a slight air gap at the stripping nip and, as a suction draft is applied below the stripping rolls 11 and 12 for doctoring them according to the present invention, a further incidental benefit of the suction doctoring is the maintenance of an air current into the stripping nip that aids considerably in starting the waste roving R therethrough for stripping.

The arrangement for imposing the suction draft below the stripping rolls 11 and 12 is shown in FIGS. 1 and 2 as comprising a blower unit 13 driven from a motor at 14 to provide a suction source that is connected to draw through a suction leg 15 on an elongated housing or suction chamber 16 extending in comparable length with the stripping rolls 11 and 12. This suction chamber 16 is disposed toward one side of the frame structure (i.e., toward the left as seen in FIG. 2) and has the suction leg connected thereto in offset relation toward this side so as to overhang toward the other where it is formed with an upwardly opening lengthwise slot 17, having a more or less centrally disposed partition element 18 extending therein for a purpose that will be noted presently.

Above this slot 17, the suction chamber 16 has a similarly elongated throat structure erected thereon that is formed by outer

side wall members

19 and 20 together with an inner partitioning member 21 dividing the intervening space so that separate throat portions extend openly to the underside of each set of stripping

rolls

11 and 12 provided. Adjacent their upper edges each of the

side wall members

19 and 20 of the throat structure, and the inner partitioning member 21 thereof as well, is fitted with an adjustable lip member as seen, respectively, at 22, 23, 24 and 25 in FIG. 2; these lip members being shaped to flange the open end of each throat outwardly beneath the respective stripping

rolls

11 and 12 and being set in closely shrouding relation thereat for applying the previously mentioned suction doctoring.

The setting of the lip members 22-25 for this purpose is of a .040" spacing from the respective stripping roll surfaces, and when a suction head in the order of 4" of water is applied through the suction chamber 16 the result is to impress a high velocity air current, approximating 120 miles per hour, at the surfaces of the stripping rolls 11 and 12 in spaced relation beyond the discharge side of the nip that they form and oppositely with respect to their direction of rotation. Such an air current is remarkably effective in maintaining the stripping rolls 11 and 12 free of lapping under adverse static conditions. It has previously been suggested that the air currents induced by the suction draft may act in some -Way to discharge the static electricity to account 'for the exceptional doctoring effectiveness obtained. In any :event, the severe lapping tendency characteristically en countered in handling synthetic yarns is eifectively counteracted, and the waste roving R being stripped issues at the discharge side of the stripping rolls 11 and 12 in strand form, as at S in FIG. 1, to be entrained by the suction draft and drawn downwardly in the throat structure toward the suction chamber 16 at the lengthwise slot 17 therein.

The thus entrained roving strands S are caught and delivered from the suction chamber 16 by an endless conveyor belt 26 having its conveying reach arranged to run over the lengthwise slot 17; the previously noted slot partition element 18 being provided to afford support for the belt 26 thereat and the throat

structure side walls

19 and 20 being set on spacer bars at 19' and 20 to form running clearance for the belt 26 thereunder. The belt 26 must of course have a sufficiently porous character to avoid choking the suction draft at the slot 17, and an open-mesh nylon belt 26 serves appropriately in this respect.

The conveying reach of the belt 26 is extended between an idler roll 27 carried by the frame structure 10 adjacent the feeding end of the apparatus and ahead of the suction chamber 16, and a driven roll 28 carried beyond the suction chamber 16 and forming an element of the drafting station at which the stripped roving strands are reconditioned as will be described further presently. The return reach of the belt 26 runs outside the suction chamber 16 beneath its overhanging portion as indicated at 26' in FIG. 2, while the conveying reach enters and leaves the suction chamber 16 through end wall closures such as are indicated at 29 and 3b in FIGS. 1, 2 and 3; the end wall 29 through which the belt 26 enters simply having a suitable entrance slot formed therein as at 29' in FIG. 2, but the other end wall 30 having a special gate structure 31 and sealing roll 32 arranged thereat, as illustrated in FIGS. 3 and 4, to provide for orderly delivery 02 the stripped roving strands S therethrough on the belt 2 The gate structure 31 is seen in FIGS. 3 and 4 as constituting a hinged lower portion of the end wall 30 that is hung from hinge means at 33 to allow an outward swinging displacement while normally remaining biased by its weight in a closed position at which its lower edge extends across the belts 26 at a sufficient clearance spacing to allow passage thereunder of the roving strands S being delivered to the drafting station. The delivery of the stripped roving strands S from the suction chamber 16 must be specially arranged in order to protect them from suction draft disarrangement as they leave. Any such disarrangement can lead to a gathered jam of the strands S behind the gate structure 31, and it is for the automatic relief of any jam of this sort that the gate structure 31 is hinged for a yielding outward swinging. An outward swinging of the gate structure 31 in response to a jam thereat is additionally employed as a stop motion through an arm portion 34 thereon that normally holds a switch arm 35 closed to maintain an operating circuit through a monitoring switch 36, but that releases this hold to open the switch 36 and stop the stripping operation whenever the gate structure 31 responds to a jam.

Difficulty with jamming is rendered unusual, however, by arrangement of the previously noted sealing roll 32 at the gate structure 31 to baffle the suction currents thereat. This sealing roll 32 is provided in the form of a simple hollow tube that is sufficiently light for floating at the outer face of the gate structure 31 within caging means formed by depending and inwardly extending

arm members

37 and 38 for endwise positioning and swinging pick-up, and a sidewise confining lip element 39, that are carried by a supporting bracket 40 arranged on the gate structure 31 above the sealing roll 32. As thus arranged, the sealing roll 32 is free to ride the conveyor belt 26 and the roving strands S being delivered thereon while being sucked against the gate structure 31 to form a practical seal against the suction draft thereat. A bearaasaaea ing strip 41 of Teflon or the like is provided at the outer face of the gate structure 31 to ease the friction drag on the sealing roll 32 at this point so that it will be rotated readily through its riding contact on the belt 26 and the roving strands S carried thereby. Below the bearing strip 41, the gate structure 31 also preferably carries shoe ele ments 42 to each side of the belt 26 to battle the suction draft further at each end of the sealing roll 32.

Additionally, in order to render the adjacent suction currents manageable to the best advantage, the suction chamber 16 and the lengthwise slot 17 therein are extended beyond the gate structure 31 and the sealing roll 32 as indicated in FIGS. 1 and 4, and the supporting bracket 40 carrying the sealing roll caging means is also extended to carry a depending baffle element 43 adjacent the farthest extent of the suction chamber 16 so that the suction currents thereat are predominantly directed downwardly through the belt 26 rather than flowing to any significant extent along the belt surface and disturbing the roving strands S being delivered thereon. As a consequence, the delivery of the roving strands S from the suction chamber 16 beneath the sealing roll 3?; takes place in an orderly fashion quite consistently, and the delivered strands are thereupon presented at the drafting station that has been mentioned earlier.

It has already been noted that the driven roll 28 carrying the conveyor belt 26 also forms one element of this drafting station, and it does so by carrying the belt 26 beneath an opposing roll member 4-4 to form a holding nip for the roving strands S delivered thereto on the belt 26 as seen in FIGS. 1 and 5. The upper opposing roll 44 forms an effective holding nip for present purposes under rather light weighting; it being sufficient to mount the roll in bearing brackets 45 pivoted in offset relation as at 46 and biased by a simple tension spring 47 in order to provide fully adequate weighting.

The simple arrangement of this holding nip is made possible by the use of an adjacent pair of

brush rolls

48 and 49 for drafting action in relation thereto. Brush rolls 4% and 49 of a normal variety for such an application, suitably a nylon bristle type of about 4" diameter, apparently act in a much more pronounced way on the individual fibers of a waste roving strand S being handled than on the strand as a whole, and this apparent effect provides a number of significant advantages. The simple and lightly weighted arrangement of the related holding nip has already been mentioned. A consequent result of considerable significance is a marked absence of appreciable wear at the holding nip and more particularly at the brush rolls in comparison with the wear experienced in using conventional drafting rolls for a comparable purpose as disclosed by the previously noted co pending application Serial No. 204,480.

Even more significant, however, is the effectiveness of the drafting disruption that is obtained with the brush rolls 48 and 49 for reconditioning the waste roving being handled. The effectiveness of this disruption seems to result not only from the apparent tendency of the brush rolls 4S and 49 to act predominantly on the individual fibers of the strands S issuing from the holding nip, but also from the opening action that results as the fiber is thrown free of the brush rolls incident to the drafting disruption.

The action of the brush rolls 48 and 49 on the individual fibers renders their setting in relation to staple length much less critical than is usually the case. With 4" brush rolls 43 and 49 arranged in relation to holding nip

rolls

28 and 44 of 2% diameter, the minimum nip-to-nip setting possible is about 3 /2", yet staple lengths from 1" up to 3" or more are handled effectively at this setting; that is, with good drafting disruption without damaging the staple length. As a result, the brush rolls 48 and 49 in particular run at the surface of the belt 26 as it is trained about the bottom holding nip roll 28 to provide a cleaning action thereat with respect to any roving strand S tending to lap on the belt surface.

When unusually high staple lengths must be handled, such as a staple up to 4" to 4 /2" as is sometimes encountered in synthetic yarns, the nip setting can be lengthened advantageously by moving the top brush roll 49 off from the upper holding nip roll 44 While still maintaining the bottom brush roll adjacently set for belt clearing action. Such adjustment is permitted by the mounting arrangement of the brush rolls 48 and 49 which is seen in FIG. 6 to comprise bearing blocks 50 and 51 secured for adjustment lengthwise along the incline of diagonally arranged flange portion 52 and 53' on supporting

brackets

52 and 53 that are carried on the frame structure 10 for vertical adjustment.

The drafting disruption of the waste roving strands S that is accomplished by the brush rolls 4% and 49 also results importantly, as already noted above, from the opening action that occurs as the brush drafted fiber is thrown free centrifugally, and the brush rolls 48 and 49 are therefore preferably operated at a relatively high speed. Represen'tatively, the larger stripping rolls 11 are driven to operate the stripping nip, and at a 2% diameter they should be driven at about 960 r.p.n1. for satisfactory and reasonably rapid stripping action. The

rolls

23 and 44 which form the holding nip and should then be run at a somewhat faster speed, suitably about 990 to 1000 rpm, so that a take-up is maintained on the waste roving strands S as they are delivered 'to the drafting station. The relative speed of the brush rolls 48 and 49 under these conditions should be of the order of 5200 to 5400 r.p.m., so as to result in a brush roll surface speed approaching eight times the surface speed at the holding nip. Suitable drive connections to obtain. the foregoing speed relations are preferably arranged for the brush rolls 48 and 49, as at 48 and 4-9, from the same drive shaft employed to drive the lower holding nip roll 28 as at 28, and from which the stripping rolls 11 may also be driven in the manner disclosed by the previously noted oopending application Serial No. 204,480.

With such speed relations, the brush roll draft on the roving strands S from the holding nip is combined with a centrifugal opening action that throws the'fiber free in an extremely good reconditioned form, as indicated at F in FIG. 1, so that it is only necessary to effect a suitable recovery collection of this reconditioned fiber F for reuse. Such recovery may be conveniently provided for, as illustrated in FIGS. 1, 5 and 6, by arranging a suction throat 5d at the discharge side of the brush rolls td and 49, and connecting this suction throat 54 through the suction leg 15, as at 55, so that the blower unit .113 is additionally employed to generate the recovery suction and to discharge the recovered fiber F to any suitable collection space (not shown). The collection space might be a waste box or cart arranged adjacent the apparatus for removal and replacement when filled, or the apparatus might be arranged to discharge directly into a hopper feeder for metering the reconditioned fiber F to a picking operation.

However the final recovery collection is effected, the stripping efiiciency and degree of reconditioning obtained is unique, and it should be understood that the present invention has been described in detail above for purposes of illustration only and is not intended to be limited by this description or otherwise except as defined by the appended claims.

We claim:

1. Bobbin stripping apparatus comprising first and second elongated roll members disposed adjacen-tly to form a nip, said roll members being arranged to support spent roving bobbins in relation to said nip and to rotate for receiving the free end of waste roving from said bobbins in said nip and causing stripping withdrawal of said waste roving therethrough in strand form, housing means forming a suction chamber in relation to said roll members at the discharge side of said nip, said housing means presenting an open throat at said nip discharge side that is disposed for closely shrouding the surfaces of said roll members in spaced relation beyond said nip, and means for applying suction within said housing means, the open throat of said housing means being fitted with adjustable flanges whereby the shrouding clearance at said open throat may be set in relation to the suction applied thereat to provide a suction draft at said clearance of sufliciently high velocity to obviate lapping of the waste roving on the nip forming means.

2. Bobbin stripping apparatus as defined in claim 1 and further characterized in that the open throat of said housing means is outwardly flanged for shrouding disposition at the surfaces of said roll members with the throat flange surfaces clearing the respective roll member surfaces at a placing of the order of .040, and the suction applied by said last mentioned means at the discharge side of said nip is of the order of 4 of water.

3. Bobbin stripping apparatus as defined in claim 1 and further characterized in that one of said roll members has the surface thereof relieved slightly between relatively short end portions that are disposed in surface contact with the other of said roll members.

4. Bobbin stripping apparatus as defined in claim 3 and further characterized in that the relief at the surface of said relieved roll member is in the order of .005 to .007".

5. Bobbin stripping apparatus comprising at least one set of first and second elongated roll members disposed adjacently to form a nip, said roll members being arranged to support spent roving bobbins thereon in relation to said nip and to rotate for receiving the free end of waste roving from said bobbins in said nip and causing stripping withdrawal of said waste roving therethrough in strand form, housing means forming a suction chamber in relation to said roll members at the discharge side of said nip, said housing mean-s presenting an open throat at said nip discharge side that is disposed for closely shrouding the surfaces of said roll members in spaced relation beyond said nip, means for applying suction within said housing means so as to create a suction draft through said open throat for doctoring action at the surface of said roll members beyond said nip, and a porous conveying means extending through said housing means across the application of said suction for catching waste roving strands stripped through the nip of said roll members and delivering the caught strands from said housing means, said housing means being fitted with a yieldable gate member in relation to the active surface of said conveying means adjacent the delivery end thereof for relieving any delivery jam, and said housing means being sealed thereat by a floating roll member riding said active conveying means surface at the outer face of said gate member and held thereat by the suction applied within said housing means.

6. Bobbin stripping apparatus as defined in claim 5 and further characterized in that said porous conveying means comprises an endless open-mesh belt having a conveying reach thereof trained through said housing means.

7. Bobbin stripping means as defined in claim 6 and further characterized in that said housing means extends openly beyond said gate member and floating roll member at the opposite surface of said belt conveying reach, .and said gate member carries a baflle element beyond said roll member for directing the suction draft thereat through said belt.

8. Bobbin stripping apparatus comprising at least one :set of first and second elongated roll members disposed adjacently to form a nip, said roll members being arranged to support spent roving bobbins thereon in relation to said nip and to rotate for receiving the free end of waste roving from said bobbins in said nip and causing stripping withdrawal of said waste roving therethrough in strand form, housing means forming a suction chamber in relation to said roll members at the discharge side of said nip, said housing means presenting an open throat at said nip discharge side that is disposed for closely shrouding 8 the surfaces of said roll members in spaced relation beyond said nip, means for applying suction within said housing means so as to create a suction draft through said open throat for doctoring action at the surface of said roll members beyond said nip, an endless open-mesh belt having a conveying reach thereof trained across the application of said suction for catching waste roving strands stripped through the nip of said roll members and delivering the caught strands from said housing means, a training roll member carrying said belt at the delivery end of said conveying reach, an opposing roll member riding said belt at said training roll member to form a holding nip thereat for Waste roving strands delivered by said belt, and a pair of brush rolls disposed at the discharge side of said holding nip for drafting disruption of waste roving strands delivered by said belt.

Bobbin stripping apparatus as defined in claim 8 and further characterized in that said suction applying means includes an additional suction throat arranged for effecting recovery of said Waste roving after drafting disruption by said pair of brush rolls.

Bobbin stripping apparatus as defined in claim 8 and further characterized by means for rotating said pair of brush rolls at a speed which will convert the waste roving to the general condition of opened raw stock.

11. Apparatus for converting waste roving to the general condition of opened raw stock comprising top and bottom rotating roll members arranged as a vertical stand and forming a holding nip, means for delivering strands of waste roving to the holding nip formed by said roll member stand including an endless belt trained about the bottom roll member of said stand and driven thereby, a pair of rotating brush rolls disposed in generally corresponding top and bottom relation at the discharge side of said holding nip and forming a drafting nip aligned with said holding nip, and means for rota-ting said brush rolls at a substantially greater surface speed than said rotating roll members for drafting disruption of said waste roving strands as they issue from said holding nip, the bottom brush roll of said pair being disposed closely adjacent the surface of the delivery belt trained about said bottom roll member for clearing action with respect to any roving strands tending to lap on said belt surface, and the surface speed at which said brush rolls are rotated exceeding that of said holding nip roll members sufficiently to cause said drafting disruption in a manner that throws the disrupted roving from said brush rolls centrifugally.

12. Apparatus as defined in claim 11 and further characterized in that both brush rolls of said pair are adjustably mounted for setting the clearing action of said bottom brush roll while allowing the top brush roll to be positioned in relation to the staple lengths of the waste roving being co-nvered.

References Cited by the Examiner UNITED STATES PATENTS 644,031 2/1900 Morison 1986 1,319,486 10/1919 Pirtle 19262 X 1,412,719 4/1922 Stutts 28-19 2,450,916 10/1948 Coss et a1.

2,686,953 8/1954 Pike 28-72 2,769,598 11/1956 Drake et al 2819 X 2,834,090 5/1958 Vowles 2819 2,890,493 6/1959 Clark 1965 2,948,021 8/1960 Bailiff 1965 3,040,412 6/1962 Russell 28-1 3,083,416 4/1963 Hashimoto 19159 3,124,844 3/1964 Constantine et a1 19--155 3,163,913 1/1965 Gwaltney et al 2819 FOREIGN PATENTS 685,487 1/1953 Great Britain.

5 ROBERT R. MACKEY, Primary Examiner.

Claims

1. BOBBIN STRIPPING APPARATUS COMPRISING FIRST AND SECOND ELONGATED ROLL MEMBERS DISPOSED ADJACENTLY TO FORM A NIP, SAID ROLL MEMBERS BEING ARRANGED TO SUPPORT SPENT ROVING BOBBINS IN RELATION TO SAID NIP AND TO ROTATE FOR RECEIVING THE FREE END OF WAST ROVING FROM SAID BOBBINS IN SAID NIP AND CAUSING STRIPPING WITHDRAWAL OF SAID WASTE ROVING THERETHROUGH IN STRAND FORM, HOUSING MEANS FORMING A SUCTION CHAMBER IN RELATION TO SAID ROLL MEMBERS AT THE DISCHARGE SIDE OF SAID NIP, SAID HOUSING MEANS PRESENTING AN OPEN THROAT AT SAID NIP DISCHARGE SIDE THAT IS DISPOSED FOR CLOSELY SHROUDING THE SURFACES OF SAID ROLL MEMBERS IN SPACED RELATION BEYOND SAID NIP, AND MEANS FOR APPLYING SUCTION WITHIN SAID HOUSING MEANS, THE OPEN THROAT OF SAID HOUSING MEANS BEING FITTED WITH ADJUSTABLE FLANGES WHERE THE SHROUDING CLEARANCE AT SAID OPEN THROAT MAY BE SET IN RELATION TO THE SUCTION APPLIED THEREAT TO PROVIDE A SUCTION DRAFT AT SAID CLEARANCE OF SUFFICIENTLY HIGH VELOCITY TO OBVIATE LAPPING OF THE WASTE ROVING ON THE NIP FORMING MEANS.