US2422011A

US2422011A - Means for stripping carding apparatus

Info

Publication number: US2422011A
Application number: US499268A
Authority: US
Inventors: Jr William H Goldsmith
Original assignee: Abington Textile Machinery Works Inc
Current assignee: Abington Textile Machinery Works Inc
Priority date: 1943-08-19
Filing date: 1943-08-19
Publication date: 1947-06-10
Anticipated expiration: 1964-06-10

Description

June l10, 1947. w. H. GoLDsMlTH, .1R 2,422,011

MEANS FOR STRIPPING CARDING APPARATUS Filed Aug. 419, 1943' 4 Sheets-Sheet `1 June 10, 1947. w. H. G oLDsMlTH, JR v 2,422,011

MEANS( FOR STRIPPING CARDING `APPADRATUS Filed Aug. 19, 194s 4 sheets-Sheet 2 YJun@ 10, 1947. w. H. GoLDsMlTl-l, JR

' MEANS FOR STRIPPING CARDIN@ APPARATUS Filed Aug. 19, 1943 4 Sheets-Sheet 3 June 10, V1947. w. H. GOLDSMITH, JR

MEANS FOR STRIPPING CARDING APPARATUS Filed Aug. 19, 194s' 4 sheets-sheet 4 JAZZ Patented June 10, 1947 UNITED PATENT OFFICE E M f 242.22911' y MEANS Fon STRIPPING CARDING Y APPARATUS Y William H. Goldsmith, Jr., Brookline, Mass., as-

signor to Abingtonl'lextle Machinery Works, Boston, Mass., a trust of Massachusetts Application August A19, 1943, serial No. 499,268

The present invention relates to card stripping apparatus for stripping card clothed cylinders. More particularly, the ,invention is concerned with apparatus by which theistripping may be carried out automatically without stopping the machine or otherwise interfering with continuous production of the lap. Certain aspects of the invention are directed to improvements in the stripping apparatus comprising the subject matter of my prior Patent No. 2,327,349, issued August 24, 1943.

That application Ydiscloses a method and apparatus for Vpneumatic stripping wherein suction is applied to relatively narrow strips of the carding cylinder according to a predetermined pattern or sequence, the suction being applied briefly to one strip after another in succession so as to effect a substantially continuous stripping with but slight effect on the nished web.l The card is thus enabled to operate continuously, instead of 14'o1aims. (o1. 19-109) the flats aids in eliminating any non-uniformity being forced to shut down for periodic over-all stripping as required by conventional practice.

In the machine of the prior application, the stripping apparatus is disposed, relative to the carding cylinder, beyond the point of deliveryA of the web to the doier, so as to operate on the por;V tion of the mat that remains on the cylinder. Iylowever,` in vacuum stripping, it has been found that there is some tendency, especially at the commencement of each stripping, to loosen but to re-V move only partially the residue of fiber in the zone of stripping. That is, upon the application of suction at any given area, some time must elapse before it becomes effective to stripto the full depth 0f the wires, and in the meantime, the cylinder has advanced beyond the zone of effectiveness of the suction. With the stripping apparatus positioned as above described, it appears that these loosened but unremoved fibers or tailings, frequently containing foreign matter impacted therewith, are carried into' the clean fibers thereafter received by the cylinder `from the licker-in and are consequently incorporated in the web.

It has :been found that this condition may be substantially improvedif the stripping is carried out within the zone customarily occupied bythe flats, preferably close to the licker-in, in the region where a clean fiat rst contacts the cylinder and the oncomingnew cotton. In this location, such material as is not entirelyremoved` duringr the initiation of operation of a suctionnozzle is, if A loosened at all, `brought up to a point where the close-setting flat wires effectively remove the tailings. Furthermore, the operatlonof in the lap that may result from the localized stripping operations, with the result that the web supplied to the doffer is at all times uniform To apply suction selectively to small areas of the card cylinder, the machine of the prior application employs a nozzle member having a plurality of closely spaced suction passages directed towards the cylinder and arranged to cover the entire length of the cylinder. Communicating with these passages is a suction manifold, connected to a source of suction. Through the provision of control means intermediate the manifold and the passages, one after another of the passages is placed in communicationA with the suction manifold according to a predetermined sequence so that the entire width of the cylinder is treated during the course of a cycle of operation. Thecontrol means is in the form of an endless belt, provided with accurately located apertures which register with one or another of the suction passages to provide communication bey tween the latter and `the suction manifold, the

belt being advanced in step by step fashion between the manifold and the adjacent ends of the suction passages. However, certain difficulties have been found with the operation of this apparatus due to clogging by fibers which are caught in transit by the belt as the latter moves to cut off a passage following the application of suction through that passage. Furthermore,` it has been found desirable to provide greater flexibility of Ycontrol of the suction periods than that afforded by varying the rate of belt advance alone. `Itistherefore an object of the present invention to pro-vide pneumatic stripping apparatus of improved construction and arrangement, so as to operate automatically and effectively and thereby make possible the uninterrupted production of a uniform and uncontaminated web with a minimum of waste. u

More specifically, the invention has as an object the provision of pneumaticstripping apparatus operating automatically to strip successive narrow lateral strips from the mat in predetermined sequence, the apparatus being adapted to function effectively without clogging for long periods of time. 1 L L In accordance with these objects the invention contemplates, as a feature thereof, the provision `of pneumaticcardstripping apparatus adapted to strip narrow lateral strips ofthe card cylinder according to a predetermined sequence, the strip..

ping being carried out on that portion of the cylinder between the licker-in and the doler, in the region of operation of the travelling flats.

Another feature of the invention relates to pneumatic stripping apparatus adapted to strip successive narrow lateral strips of the card cylinder according to apredetermined sequence, the suction being applied to the card cylinder through a plurality of suction nozzles from a suc-v tion manifold, said apparatus including means for terminating the suction period at each of the nozzles by opening the manifold to atmosphere, thereby clearing the passages of fibers in transit.

The invention further contemplates, as a feature, the provision of pneumatic stripping apparatus arranged to operate in the portion of the machine occupied by the travelling flats and adjacent the licker-in, the apparatus comprising suction nozzles carried by the ilats and disposed in various positions laterally in successive flats according to apredetermined pattern, a suction manifold, and means dependent at least in part on the progression of the flats about the cardingcylinder for establishing and terminating su'ction communication between the manifold and the suction nozzles to strip narrow lateral strips of the 'cylinder in predetermined sequence.

In the accompanying drawings, Fig. 1 illustratesV a partially diagrammatic longitudinal section of a standard cotton card embodying stripping apparatus according to the preferred embodiment of the invention; Fig. 2 is a detail view, partly in section, of a portion of the stripping apparatus shown in Fig. l; Fig. 3 is a fragmentary t'op plan view of certain of the parts shown in Fig. 2; Fig. 4 is a detail view of shut-off valve mechanism; Fig. 5 is a View in side elevation, partly broken away, of a modified form of stripping apparatus; Figs. 6 and 7 are detail views of the apparatusshown'in Fig. 5, taken at different times in the operation of the apparatus; and Figs. 8 and 9 are detail sectional views of the edge portion of the suction control belt employed in the embodiment shown in Fig. 5.

The card illustrated in Fig. l is, except in respect to the stripping apparatus to be described', of conventional design, the principal elements being the licker-in l2, carding cylinder l4 and doffer'li. During the passage of the lap I8 from licker-in to dofler, the lap is engaged by a series of flats 2t which are moved slowly over the surface of thecarding cylinder by means of driving chains 22 to which the flats are connected. Driving means for the flats are illustrated as vcomprising belt or chain drive 24 from the carding cylinder to a jack shaft 26 which in turn drives shaft 28 through double reduction worm gearing 30 and 32 to advance the flats a distance equal to the spacing between successive ats in approximately twenty-seven seconds. Other types of driving connections and diierent rates of ilat advance may of course be provided as. desired.

To perform, during continued operation of the machine, automatic vacuum stripping of the card cylinder in the region which has been found most favorable from the standpoint of continuousvproductionv of a uniform and uncontaminated lap from which a minimum of ber has been removed by the stripping operation, the stripping apparatus of the invention is disposed inthe at area ofthe machine and operates in conjunction with' the fiats themselves. By stripping in this zone, rather than in that portion Yof the carding cylinder between the doier and the licker-in, the fibers or tailings which are loosened but not removed during the initial application of suction at each nozzle are not carried along into the new cotton received from the licker-in and so blanketed thereby that the hat wires are relatively ineffective to remove these tailings. Instead, the stripping is carried out, as hereinafter described, in that region of the cylinder within which the iiats operate on the new cotton received by the carding cylinder from the lickerin, with the result that any tailings loosened or released during the initial application of suction at the beginning of a furrow are immediately engaged by the flat wires and picked up thereby. The dirty bers are thus effectively eliminated from theV finished lap, permitting the manufacture of yarn of high quality with less combing, and in many' cases without the necessity of any combing operation.

In accordance with the preferred arrangement for carrying out the stripping operation in this region of the carding cylinder, the flats are provided with suction nozzles 40 which extend into close proximity to the tops of the card wires 2. These nozzles may be in the form of tubes of square or rectangular cross-section and are conveniently mounted in the flats by passing the tubes through a suitable aperture provided in one of the webs 44 of the at body, which is generally of inverted T-shaped section. At their top or outer ends, the tubes are positioned by a strip 4G secured to and extending the full length of the central web d'84 of each ilat. The tops of the tubes are ground off flush with the top surface of the strips 46, while the mouths are ground to lie in the same plane as the ends of the ilat wires 59, this latter grinding operation preferably being carried' out along with the grinding of the ilat wires. In accordance with preferred practice, this plane is not exactly tangent to the periphery of the card wires at the flat, but is at a slight angle thereto, converging in the direction of rotation of the card cylinder.

To carry out the method of sequential stripping of narrow strips of the card cylinder according to a predetermined pattern, each flat is preferably provided with a single suction nozzle, the nozzles in succesive flats being positioned in the flatsl transversely thereof according to a pattern similar to' that employedV for the apertures in the endless belt forming a part of the stripping apparatus disclosed in prior Patent No. 2,327,349', above referred to. According to this arrangement, illustrated in fragmentary fashion in Fig. 3, the nozzles in successive flats, typified by nozzles 52, 54,l 56, are disposed alternately on either side o'f a center line (such center line being indicated at 58) and at progressively increasing distances from saidv line, so as to strip progressively from thev center outwardly while alternating from one sid'e to the. other of the center line. The spacing betweenv successive nozzles on each side of the center line is made somewhat greater than the nozzle width, this spacing continuing throughout one series of nozzles. In the succeeding series, the nozzles are arranged in the flats intermediate the positions of nozzles of the preceding series, to enable all portions of the card cylinder to receivev stripping treatment.

Suction is supplied to each of said nozzles in succession by meansv of a suction manifold 60 extending substantially thel full lengthof the carding cylinder and preferably located in the region where-the clean flats first engage the card cylinder, that is, near the licker-in. The manifold, which' is connected in any suitable manner,

as by hose or Vflexible pipe (not shown) to a vacuum pump or` other source of suction (likewise not shown), is formed with a long continuous slot B2 in one wall so as to permitcommunication, at one time or another, with the top opening of the suction nozzle of each flat as the latter moves into position of registration with the manifold. During registration, the slot is closed, except for communication with the nozzle, by th'e top plate 46 with which each nat is provided. The

contacting face of the manifold is preferablyV provided with resilient sealing material |53 such as Vleather or rubber.

The flats, in their normal operation,progress slowly around the carding cylinder, and this movement serves to bring successive nozzles into position of registration with the slot inthe manifold. To insure proper suction communication between manifold and nozzle at these times `of registration, the manifold is mounted for bodily movement toward and from the ats in timed relation to the rate of flat advance. To this end, the manifold is carried on levers 64 arranged for rocking movement about shaft 6B. The levers are given limited rocking movement by means of cam discs 68 which are engaged by fol-lowers 'lli at the ends of levers 64.

A yieldingconnection affording two degrees of freedomis provided between the levers and the manifold. Guide studs 12 loosely received in the levers and carrying compression springs T4 enable the manifold yieldingly to be urged into engagement with the top plate of the at when the cam is in a position where the follower'l is at the low point 16.` During such time as the manifold is in contact with the flat, the manifold may partake of limited translational movement along with the flat, this being permitted by tension springs 18 which, when the manifold is disengaged from the nat, draw the manifold back to a position determined by adjustable stop pins 80 preparatory tobeing lowered into engagement with the following fiat to initiate suction communication with the nozzle thereof. f

Driving connections for moving the nozzle into and out of` engagement with successive flats are provided from the shaft 26 of the `flat-driving mechanism. These connections involve a cam 82 on said shaft, a bell crank 84 provided with a relative to the driving connections for the flats as tc provide relatively brief engagement between the manifold and each flat. For example, if the interval between the arrival of successive iiats at registration with the manifold is of the order of twenty-seven seconds, th'e manifold may be maintained in engagement with thel flat for perhaps two seconds.

The stripping is therefore not continuous in the sense that at all times some portion of the card cylinder is being subjected to stripping action. The stripping is, however, continuous insofar as the removal of material in a succession of increments makes possible the continuous production of a uniform and uncontaminated lap. The utilization of a relatively small fraction of the `available time for stripping at each `nozzle has proven entirely practical because of the effectiveness of 'stripping according yto this technique of removingthe material in a-contnuing succes- 6, sion ofincrements during `normal operation of the machine.` `Byreducingthe `stripping interval at each nozzle, the amount of material removed by'the stripping may be limited only` to that necessary for4 maintaining the cylinder in the ycondition for most effective carding. n

While each suction period is effectively terminated by breaking suction communication between the manifold and the individual suction nozzles in the fiat, this results in opening the full length of the slot to atmosphere, with consequent waste of energy due to th'e additional volume of air to be handled. A control valve is therefore provided, in the line between manifold and source of suction, the valve being actuated in timed relation to the establishment and termination of suction communicationbetween manifold and the suction nozzle in each flat.`

Such a valve may be of any suitable construction and arrangement, `that illustrated in Fig. 4 comprising a slide valve |00 providedY with an aperture |02 `and adapted to be reciprocated across opposingfaces of the supply conduit |04 by a lever |06 rocked by a ,cam` |08. This cam may conveniently be mounted on the same shaft with the cam disc by which the manifold is moved into and out of engagement with each at.

The timing ofthe cam discs is so arranged that suction is supplied to the conduit substantially in synchronism withV the'establishment of communication between manifold and the suction nozzle of the flat. Suction is not cut off, however, until an appreciable time interval after communication between manifold and suction nozzle has been terminated by withdrawing the manifold from engagement with the flat. Upon separation of manifold and nozzle, stripping by that nozzle ceases and air rushes directly into the slot along the full length thereof. This inrushing air quickly cleans the passages of all loose fibers, carrying along past the cut-olf `valve toward the receiver any fibers that were in transit when suction ceased at the nozzle mouth. Thereafter, the valve is moved to closed position, without risk of clogging by reason of intercepted fibers, since only clean air, free of fibers, is then flowing through manifold and connectingpipes.

This sequence of operations is of important benefit, since all parts, particularly those involving surfaces which must `periodically engage in in stripping apparatus of the type disclosed in my prior application, employing an endless belt having approximately disposed apertures to control the stripping sequence.

In this embodiment, illustrated in Figs. 5 to '7, the suction nozzles .are arranged in closely spaced relation in` a nozzle member |20 fixed in the ma ,chine frame to maintain the nozzle mouths'close .to the carding cylinder. This nozzie member, and

.other elements `of the apparatus are, except as Ahereinafter specifically described, similar to those of the aforesaid application, to which reference T may be made fora com-plete. disclosure.. vAlma-ni'- fold; |22 communicating: with. a source: off suction, not' shown', is provided. with. a continuous slot lf2-4f extending the lengthl of the nozzle member.

The; sequence ofA operation of the suction nozizles is controlled by an endlessbelt |526` having. apertures arrangedzasin the prior'applicationand driven by sprocketsl- |28 engaging the' reinforced margins ot the belt. Such 'reinforcement may comprise perforated metall strips |130I secured. at intervals by open' rivetsl |321: (see Figs. 8f and 9=). A shut-off valve, which may be similar to. that. illustrated in Fig. 4,V is. disposed; in:v the: conduit betweenmanifoldf and suction supply;

The manifold is positioned beneath the nozzle member in guideways: |236. which permit movementvof the manifold toward and from the nozzles. The manifold is. reciprocated in timed relationtobelt advanceby-means of cams- |.'3K secured to a shaft |49. journalled beneath the: manifold and rotated. by chain and sprocket'. connections |42; |44 from shaft. Mit from which the step-wise drive for thev endless belt is` derived. The cams are engaged byy cam followers- |4-8` mounted on the manifold, tension springs |561 being employed to cause the mani-fold position to follow the cam track.

As in the embodiment of the prior application, the endless belt runs between the manifold and the nozzle member. InL order that the belt may partake, at least in part, of the periodic movement toward and away from the nozzles, thebel-t is so placed as to be forced upwardly a slight amount by the top of the manifold. As a result, the belt tends to; follow the manifold when the latter is moved away fromthe nozzle member. As the manifold approaches its lowermost position, however, the belt is interceptedl by rods |52 extending across theV machine on each side of the manifold. Upon further-movement of the manifold` away from the nozzle. member, the belt remains supported by the rods, and clearance thus occurs between they belt and the manifold.

The sequence of operations of belt, manifold',

and suction shut-off valvey ininitiating and terminating. each suction period at the different nozzles is arranged not. only to' permit' control of the duration. of each strippingperiod, but also to insure that'Y each suction passage is cleared' of fibers and other foreign matter' before" they belt advances' to bring a different aperture into' registry.. By so: doing., the possibility is avoidediof fibers in transit being interrupted? by the belt and carried along so as to interferev the proper operationof the belt.

This resultis accomplished byI causingv the suction manifold and endless belt. to move out: of engagement with the nozzleV member bet'ore each step-wise advance oi. the belt. This. results in breaking suction. communication with they particular nozzle passagef then active;` thus. terminating the: stripping through. that nozzle. Initially, due to the clearance between the belt4 and the suction nozzles resulting from the: partial lowering of ythel manifold, air' flow continues. to take place through the. belt aperture; 'into the manifold and thence to the source otsufction, so that any fibers which were just leaving the cylinder and in transity whenv thev disengagement: took place are carried through. the belt aperture. and into the manifold so as to clearthe passage and adjacent belt aperture. of loose; bersbetore. the belt advances. to cut oli that particularV passage. As the manifold reaches its fully lowered position, clearance develops. between beltV and mani- 8,. fold, causingthe opposing surfaces. of these parts. likewise tobe'. cleaned of fibers. Thereafter,v the. shut-off valve is movedto-closed position to avoid loss of suction head and waste of energy. Upon step-Wise Abelt advance to bring another aperture into registration with its appropriate suction nozzle, the manifold is raised to establish suction communication, and the. shut. ou. valve opened to. initiate anew suction period. The relativelength ot each suction period` may thus be accurately regulated to provide the desired amount of strippingv at each nozzle.. Accordingly, only so much material need be stripped as is necessary to. provide proper cleaning, of the. wires, and consequently waste oi material may be reduced to a While both embodimentsy of. the. invention. herein described` are highly effective in providing what may be termed continuous. stripping` by automatically removing small increments. of. the web in a more. or less continuous succession without. interrupting` the` production oi. the web, the construction illustrated by Figs.. 1.. to 4, wherein this method of stripping is carried outv in the flat area,- between the licker-i'n and the doier,y is especially advantageous for high quality carding. Accordingly, it is to be understood that this embodimenty is to be preferred', since it makes possible the manufacture of high quality yarn with little and in many cases with no combing.

Having described' the invention in its preferred form and an alternative embodiment thereof., I claim:

l. Means for stripping carding apparatus of the type having a plurality of flats arranged transversely of the card clothed cylinder for progressive movementA around the periphery of said cylinder in the zone between licher-in and doffer., said means comprising suction passages disposed' in said ii'ats` and extending into close proximity to the surface ofthe cylinder, a suction manifold, and means for' periodically establishing su'ction'communica'tion between the manifold andthe suction passages in the flats.

2. Card stripping' apparatus comprising; a plurality of members arranged transversely of and adapted to be advanced in continuous successi-'on around' at least a portion of the periphery of a card clothed cylinderl inv proximity to' they surface thereof, said members having suction passages therethrough exten-ding into close proximity to theV surface of the cylinder; the passages being disposed in the members at various positions transversely thereof according to a predeterminedsequence, a suction manifold, and means for periodically establishing and terminating suction communication between suction manifold and one after another of the suction passages in thev members according to' said predetermined sequence.

3. Means for stripping carding apparatus of the type having a plurality of' flats arranged transversely of the card clothed cylinder for progressive movement around the periphery of said cylinder in the region between' licher-in and doffer, said means comprising suction passages disposed in. said flats and extendingy intoclose proximity to the surface of' the cylinder, said passages being disposed insuccessive flatsat various positions transversely thereof according to a predetermined sequence, a suction manifold, a valve in control of thel suction induced therein, means for periodically establishing and termihating suction communication between themani'- told' and the suction passages in successive flats, and' means for actuating the valve in timed relation to said periodic operation to open said valve upon the establishment of suction communication and to close said valve after suction communication is terminated.

e. Means for stripping carding Vapparatus of the type having a plurality of flats arranged transversely of the card clothed cylinder for progressive movement around the periphery of said cylinder in the region between licker-in and doifer, said means comprising suction passages disposed in said flats and extending into close proximity to the surface of the cylinder, said passages being disposed in successive dats at various positions transversely thereof according to a predetermined sequence, a suction manifold, and

means operating periodically in timed relation to the progression of the flats for bodily moving the manifold into engagement with each flat in succession during the period of substantial registry of each flat with the manifold, thereby to establish suction communication between the manifold and the suction nozzle of each flat in succession.

5. Means for stripping carding apparatus of the type having a plurality of flats arranged transversely of the card clothed cylinder for progressive movement around the periphery of said cylinder in the region between licker-in and doier, said means comprising suction passages disposed in said flats and extending into close proximity to the surface of the cylinder, said passages being disposed in successive flats at various positions transversely thereof according to a predetermined sequence, a suction manifold, supporting means therefor including devices actuated periodically in timed relation to the progression of the flats to move the manifold into engagement with each of the flats in succession during the period of substantial registration of each fiat with the manifold, said supporting means including yielding connections permitting limited translational movement of the manifold whereby suction communication between manifold and the suction nozzle in each of the flats may be maintained at least briefly as the flat progresses.

6. Card stripping apparatus comprising a member provided with a plurality of closely spaced suction passages extending into close proximity to the card cylinder and disposed in said member along the length of said cylinder, a suction manifold for supplying suction to said passages, said manifold being mounted for bodily movement toward and away from the member, selector means disposed intermediate the manifold and the suction passages for opening one after another of the passages to the suction manifold according to a predetermined sequence, and means operative in timed relation to the operation of the selector means to withdraw the manifold from the member to terminate the stripping and clear the selector means.

7. Card stripping apparatus comprising a nozzle member provided with a plurality of closely spaced suction passages extending into close proximity to the card cylinder and disposed in said member along the length of said cylinder, a suction manifold for supplying. suction to said passages, selector means disposed intermediate the manifold and the suction passages for opening one after another of the passages to the suction manifold according to a predetermined sequence, and means for bodily moving the selector means and suction manifold out of engagement with the nozzle member prior to each operthe manifold and the suction passages for open-l ing one after another of the passages to the suction manifold according to a predetermined sequence, means for periodically actuating the selector means to terminate the operation of one nozzle passage and initiate operation of a different passage, and means for bodily moving the suction manifold away from the nozzle member to separate the nozzle member, selector means, and suction manifold during each actuation of the selector means.

9. Card stripping apparatus comprising a nozzle member located adjacent the surface of a card clothed cylinder and extending lengthwise thereof, the member having a plurality of fixed, closely spaced suction passages therethrough, a suction manifold disposed in parallel relation to the member and movable toward and from the same, a surface having openings therein according to a predetermined pattern, said surface being disposed between the nozzle member and the suction manifold, means for periodically advancing said surface to cause one or ambther of the openings in the surface to register with a passage in the member and thereby provide communication with the suction manifold, and means for periodically moving the surface and suction manifold bodily away from the nozzle member and for thereafter moving the manifold away from the surface prior to each periodic advance of said surface.

10. Card stripping apparatus comprising a nozzle member provided with a pluralty of closely spaced suction passages extending into close proximity to the card cylinder and disposed in said member along the length of said cylinder, a suction manifold for supplying suction to said passages, selecto-r means comprising an endless belt disposed between the manifold and the nozzle member and provided with a series of apertures therein, means for advancing the belt periodically to open one after another of the suction passages to the manifold according to a predetermined sequence, means for periodically withdrawing the manifold from the nozzle member in timed relation to belt advance to terminate suction communication with the nozzle member prior to each advance of the belt, and means adapted to intercept the belt after limited withdrawing movement of the manifold to enable the manifold thereafter to withdraw from the belt.

11. Card stripping apparatus comprising a nozzle member provided with a plurality of closely spaced suction passages extending into close proximity to the card cylinder and disposed in said member along the length of said cylinder, a suction manifold for supplying suction to said passages, a valve in control of suction in said manifold, selector means disposed intermediate the manifold and the suction passages for opening one after another of the passages to the suction manifold according to a predetermined sequence, said manifold and selector means being mounted fonmovement toward and from the'nozzle mem'- ber, and means for advancing and" withdrawing then'xanifoldA and selector means andfor'l actuating'theselector'means and the valve in timed relation to causethe maniold'and selector means to be. moved away from the nozzle member prior to closingof the control'val've' and changn of open`- ing by the selector means.

12: Card stripping apparatus comprising nozn zle means having suction passages adapted to extend into close' proximity to: the4 surface ofv a cardclothed' cylinder, a suction manifoldv having a suction passage" for' applying suction to the nozzle'. passages, meansfor causing suction to be applied to the individual` nozzle passages accord;- ing to a predetermined"l sequence to cause successive strips of the cylinder to beV stripped', and means for periodically separating spatially the manifoldand'the nozzle means to openxthe maniiold'to atmosphere intermediate the nozzle means and the manifold and thereby terminate the application of suction to said nozzlemeans..

13. Card stripping apparatus comprising4 nozzle means-havingsuction .passages adapted'to extendinto close proximity to the surface of! acard clothed cylinder,v suction. means including a suctionnianifold having asuctiom passage for applying. suction. to4 indivduaL suction. passages iny the nozzle. means according. to. a prede.- ter-mined, sequence, to. strip successive strips from .the cylinder, saidv nozzle and suctionmeans being'. relatively shiftabl'e to. effecty successive: selection. of! individual. suction passages. according tosaid sequence: andbodly separable tofinter nupt. suction: communication with the said suction passagesby-` opening the. suctionpassage in the:- manif old.. directly toatmosphere intermediate thenozzle meansY and' the manifoldgtand mechanism for periodicallyeiectingindependent shifting. and separatingv movements of the nozzle and suction means inA timed` relationA wherein said meansv are bodily separated tointenupt' suction communication' therebetween prior torelative shift thereof.

14 Card stripping apparatus comprising nozzle means having suction passages'adapted'to extendA into close proximity to the surfaceV ofv a card clothed cylinder, suctionl means including'a suction' manifold havingA a suction passage for applying` suction to the nozzle passages, a valve'in control of suction induced in the manifold; the nozzle and suction means being relatively shift'- able to effect selection of individual suctionpassages in the nozzle meansA according to a predetermined sequence and bodilyl separable to interrupt suction communication with the said suction passage in the manifold directly to atmosphere intermediate the nozzle means and the manifold, and mechanism for eifecting independent shifting and separating movements of the nozzle .and suctionv means and for controlling the valve in timedv relation thereto to cause separation of the nozzle and suction meansY prior to closing of the valve and relative shiftingV movement' o1 said nozzle andv suction means.

WILLIAM Hi GQLD'SMI'IH; JR'.

REFERENCES GITED'l The followingy references are of record in. the

'le of this patent:

UNITED STATES PATENTS Number Name Date 1,327,696 Boozer Jan. 13'; 1920 FOREIGN PATENTS Number Country Date 20,236 Great Britain. 1910 417,526 France Nov. 16,` 1910 288,057- Great Britain- Apr.,5,v 1928 Certificate of Correction Patent No. 2,422,011. June 10, 1947. WILLIAM H. GOLDSMITH, JR.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Column 12, line 17, claim 14, after suction insert passages by opening the suction; and that the said Letters Patent should be read with thiseorreetion therein that the same may conform to the record of the case in the Patent Oice.

Signed and sealed this 12th day of August, A. D. 1947.

[SEAL] LESLIE FRAZER,

First Assz'stant 'ommssz'ouer 0 f Patents.