US1482849A - Cone-winding mandrel - Google Patents

Description

Febo 5 9 G. H. KENNEDY coNE wINDNG MANDBEL Filed July 25 1222 2 sheets-sheet 1 WMM,

Mam VM,

1,482,849 l G. H. KENNEDY GONE wINDING MANDREL `Feb 5 9 Filed July 25. 1922 2 Sheets-Sheet 2 Grkotnu Patented 5, 1924. I

GIBSON H. KENNEDY, OF CEDARTOWN,

ASSIGNMENTS, T0 SONOCO PRODUCTS LINA, A CORPORATION OF SOUTH CAROLINA.

coNE-wxNnING incurran.

Application aled my a5,

T0 altwhom t ,may concern.'

l Be it known that I, GIBSON H; KENNEDY, a citizen of the United States, and residing at Cedartowm. Polk County, State of Georgia, have invented certain new and useful Improvements in Cone-Winding Mandrels, of which vthe following isa specifica- -tion.

i `This invention relates to means for winding a sheet pattern of-llexible material into the. form of a cone, open at its ends and is ,particularly adapted for use in making, from corrugated paper,-what are called cone tubes and which are extensively used in the textile. industry. It consists principally in a novel construction of the cone winding mandrel whereby the formation of the cone may be accomplished with greater ease, quickness and efficiency lproducing more perfect'and uniform cones than those made by devices heretofore vused and making possible a machine wound cone with van inner feathered edge. One ofthe most important features conslsts in the gripping means carried by the conical mandrel 'between its ends for receiving and holding the edge of a sheet pattern `which is being wound into cone form.- It permits the use of a pattern Y, having a thin straight edge extending for the full length of the mandrel and ot'- the cone to be formedand which edge is gripped. andheld on` said mandrel throughout .its '.-centralalongitndinalportion yon a longitudinal line fbutf is not gripped at vits ends but having end portions beyond the gripping means Yclosely""tit'tiig on vthe-- conical surfaces ofA .the mandrel' whereby after windin and while theV cone is still gripped and eld securely in position on the mandrel the ends of the cone may be cut ofi' to produce smooth transverse end'surfaces. rlhe inner edgeof the material form- 'ing the cone thus extends on a straight line entirely from one end of the cone to the `other having no end portionsl cut away y-to form an intermediate tongue *for-gripping??? and thus the edge may be very thin, forming a practically perfect conical inner surface after completion, such as will fit the spindle on which the cone is usedl accurately from .end to end.k In the referred form of the invention shown in' e drawings, the grippingl means, which engages the edge of,

Yrotary shaft 13 1922. serial No. 577,410.

the sheet pattern, embodies a `novel structure by which it performs the radically new and very advantageous function of pressing the previously gripped edge yof the sheet smoothly against the mner surface of the adjacent layers of the'cone'pasting it to the other layers by a wiping action over the edge when said grip mechanism is vmoved to released position. The novel features of the invention will be more fully understood from the following description and claims, taken with the accompanying drawings.

Inthe drawings, partly in section vof a cone winding mandrel and its supporting shaft, together with the elements of the mechanism for operating th means for clamping the sheet to be wo nd;

Figure 2 is a sectionon line 2-2 of Figure 1, withthe parts in'one rotary operative position;

Figure 3 is a similar view with the parts ina diierent. rotary and operative position;

Figure 4 is a section on the Figure 1, looking to the left;

Figure 5 is a longitudinal section of a mandrel embodying a modified construction; and,

Figure 1 is a side Viewline of GEORGIA, ASSIGNOB, BY MESNE AND DIRECT j COME/ANY, OF HARTSYILLE, SOUTH CARO- Figure 6 is a cross section on the line 6--6 of Figure 5.

In the particular embodiment of the 1nvention shown, for the purpose of illustration there is a mandrel 10 having a conical surface from the line 11 to the tip end 12 'l if' andmitiscarried on the end of the tubular bearing supports 14 and 15. The shaft 13 has screw threads 16 on its end which en` gage similar screw threads in a socket 17 in the base of the mandrel. Between the ends of the conicall surface of the mandrel 10, there is a comparatively thin sleevev or collar 1'8, the outer surface of which forms part ofthe conical surface of the mandrel and this sleeve. is rotatable to a limited-excourse reduced in diametric size from the which is mountedin suitable line 19 to the line 20, forming a longitudiv nal depressed portion, receiving and carry.- ing the sleeve 18 aroundit. collar 18 has a longitudinal slot 21l therein, one edge 22 of that slot being slightly 4inclined from the inner surface of the sleeve The sleeve or n lorsY f to the outer, while o posite edge 23 is curved inwardly from t e outer surface. A. solid rod. or shaft 24 is concentrically mounted in the rotary tubular shaft 13 and extends into and fits a cylindrical socket 25 inethe mandrel 10 and this rod 24 has secured to it a pin. 26, projecting at right angles and connected at its outer end to the collar 18. rlhis pin is in a transverse segmental slot 27, formed in the mandrel midway of the length of the collar 18 and this slot permits relative rotary movement between the shaft 25 and the collar 18, connected to it on the one hand and the mandrel on the other hand for a fixed distance. In other words, this relative movement is limited by the contact of the pin 26 with the ends of the slot, asshown in Figures 2 and 3. rlhe outer surface of the mandrel, at the reduced portion under the collar 18 is further reduced in diametric size below the normal position of the slot 21 in the collar, on a. plane parallel to. a tangent, leaving straight line edges 28 and 29 makin contact with the inner surface of the col ar 18 as shown in Figure 3. The portions of the conical outer surface of the mandrel at the end of this last mentioned depressed por tion andbeyond the 'ends of the collarI are depressed at 30 and 31 in line with the slot in collar 18, these depressions being on curved lines and for only a-jshort distance longitudinally from the ends of the collar. The purpose of these depressions and .the depression on the lines 28 and 29 is to permit the edge of a sheet of paper which is to be wound into cone form to enter the slot with its inneredge below the edge of the collar, whereby when the collar is relatively turned on the mandrel the edge 22 of the collar will make contact with the outer surface of the sheet 32 so as to grip it between the straight edge of the sleeve and the straight edge of the depression in the mandrel. It will be noted that the depressions 30 and 31 'at the ends of the collar permit a sheet or pattern, having a strai ht edge extending longitudinally the len of the mandrel to be movedyupwardl in igure 1, for instance, in contact wit the lower edge of the slot 21 and under the upper edge throughout the central portion vWhile the end portions of the sheet edge will lie along the surface of the 'end portions ,of the mandrel and then the relative.Y

Y rotary `movement of the sleeve von the mandrel, above indicated, will clamp it in position ready for winding. As will be seen byl reference to Figures 1 and 3, the edge of edge longitudinally of the mandrel between the depressions 30 and 31.

neeaeee In order to automatically hold the sleeve 18 in clamping position, gripping the sheet of paper being wound during the winding, yielding spring-connection is provided between the tubular shaft 13 on which the mandrel is mounted and the solid` shaft 24, rotatable with the Collar tending to hold them in clamped position. It will be seen by reference to Figure 1 that there is a cup shaped member 33 havingan outer cylin- 'ino' surface with the inner surface of the tube 13, whereas the opening in the base of member 33 forms a rotary bearing surface with the shaft'24. A coiled spring 37 surrounds the shaft 24 and extends from approximately the bot-tom of cup-shaped member 33 to the bottom of member 35 and is secured at 38 to member 33 and at 3.() to member 35. This coiled spring is normally under tension, tending tol rotate shaft 24 in a counter-clockwise direction in reference to shaft 13 and the mandrel 10 so that the pin 26, connecting shaft 24 to the sleeve 18 willnormally be in the position shown in Figure 2 near the end of the slot with the edge 22 of the sleeve in clamping position, gripping the sheet 32 between 1t and the strai ht edge 29 of the depression in the man rel. In' other words this spring normally holdsy the gripping mechanism in position to hold the sheetbeing wound dur- Aing and after Winding and until 'it is posiand out of mesh with the gear 41 so as not tol `interfere with the normal turning of that gear. on the tubular shaft 13 and the mandrel'10 during the Winding of the sheet in forming the cone. This rack bar is, of course, held and guided by suitable means 42 and may be-given its vertical movement by-any suitable means. In the particular form shown, there is a lever 43 pivoted to a fixed support at 44, having lexibleconnection at one end 45 to the lower end of the neck bar 40 and the other end having a roller A simil 46 oper-ated by a cam 47, driven in the usual way from the power which runs the machine in which it is placed. The cam, as shown, is of such sha e that the rack bar 40 will remain in its ower position out of mesh durin most of the rotation, but -as the roller 46 ri es up the inclined surface to the point the shaft 24e and the collar 18 will be turned in clockwise direction in reference to the mandrel thus carrying the edge 22 from gripped' position shown lin .Figure 2 continuously until pin.26 comes 1n contact with the end of theslot at the right in Figure 3 and the edge 23 of the slot moves, u ward until it almost reaches 'the straight e ge 28 of the depressed portion of the mandrel. It will be seen by reference to Figure 2 that this not only releases the end 32 of the sheet which was gripped during winding, but the curved outer surface of the edge 23 of the sleeve by a wiping action, passes up along the innersurface of that en forcing it outtward :and tight against the inner surface of the cone which has been formed and since that end has adhesive material on it the result will beto smoothly paste 'this edge of the material to 'the inner surface of the cone. ln starting the operation of winding a sheet into cone form, the sleeve 18 is brought to Such position that the slot in it will be in substantially midway position over the depressed `portion of the mandrel wherebfy a sheet having a straight edge for the ull length of the mandrel may be brought to position by a vertical movement when the p-arts are arranged -a's shown and bending slightly inward the central portion so as to make its edge enter lthe slot and pass up behind its pro'eotin edge 22, the depress- ions 30 and 31 at t e en s ott the sloft permittin this movement while allowing the -straigt line edge to lie along the outer surfaces of the corneal mandrel beyond the ends of the sleeve. The sleeve is thenreleascd and under the action of the spring 37 grips the edge of the sheet as shown in Figure 2, ready for'winding. The means by which the straight edge of a blank to be wound into cone form may be brought to position by movement at right anglestoits edge rand will then be grip d and held between its ends during and la r winding is regarded as one of the importan-t novel features of `'this invention, since it makes it possible to use -a blank having a veryl thin edge which will extend on a straight longitudinal line from one end of the finished cone to the other on its inner surface. lin other words it makes it possible to form an inner feathered edge on the cone which makes its inner surface approximate I`that of an inne-r cone from one end to the other, whereas heretofore in machine made cones it was deemed necessary to have a tongue between the ends for the purpose of gripping during the winding where the ends of the coneswere to be cut off on the mandrei and this necessarily left a part of the edge cut 'away at each end leaving what might be called a vacant space which might vinterfere with -the proper tit of the cone on the s indle when used. Although inthe speci c. form shown, this gripping mech-amsmb which this feathered edge is possible, emv dies a separate sleeve'which is rotatable onv the mandrel, it will be noted that the essential elements of that mechanism which makes possible the feathered edge cone, conslsts in the provision of a longitudinally straight edge between the ends of the conical surface of the mandrel with aderession in front of that edge and 'immeiately beneath it and a slightly wider depression immediately beyond the ends of that straight edge so l.as to permit a part of a longitudinal strai htedge of a sheet to enter beneath that e ge and relatively movable means for icooperating with the under surface of the straight edge forclamping the edge of the sheet thereto.

In operation, the shaft 13 and the mandrel maybe driven forwinding the cone after the edge of the sheet has been placed in position thereon and clamped by any suitable means, for instance, by pulley 4:8 driven from any, source of power and as usual in machines for winding cones, may be made to automatically stop-at the proper number of turns for the cones being made or the extent of the movement may, of course, be left to. the control of the operator by known means if desired. ln the same y way,' the cam mechanism 47 and the lever 43 may be automatically controlled by the action of the machine as is well known in the art or by the physical action of the operator by well-known means. in other words the invention does not consist in means for operating the mechanism shown but in the novel features of construction of that mechanism by which novel and useful results are accomplished. 'lt will be further understood that the invention is not limited tol the specific mechanism shown beyond what is called for in the claims.

In the form shown in Fig. 5 the conical mandrel 50 has a `screw threaded socket 51 in its larger end adapted to receive and engage the end of a hollow rotary supporting shaft like 13 of Fig. 1. Extending inwardly and longitudinally of the mandrel from vthe bottom of Socket 51 there is a passageway 52 rectangular in cross section which slidably receives the clamp operating rod 53. This operating rod is rectangular in section fitting the walls of the passageway 52 but one surface 54 at its inner end is inclined inward at a slight `angle and this inclined surface portion is not of full width as is shown in Fig-6. Side grooves 55 are formed slightly below and parallel to said inclined surfaceand extend throughout its length terminating in open ends and forming the inclined guide ribs 56. The conical surface of the mandrel at material distances from its ends has spaced depressed portions 57 and 58 inclined towards each other and at and between their inner ends there is a socket 59 rectangular in longitudinal and cross section extending inwardly to'and joining the inner end portion of passageway 52. Extending laterally over this socket 59 from one `side between the ends of the depressed portions there is a comparatively thin tongue portion 60 having a free edge 61 on a straight line and its outer surface being a part of the conical surface of the mandrel. The surface of the mandrel immediately in advance of said edge is slightly depressed at 62 permitting the central portion of a straight line edge of a sheet to pass laterally under it. A gripping member 63 which is rectangular in cross ysection fits in socket 59 below the tongue (S1 and rests on the inclined end portion 54 of the operating rod 53, and is of vsubstantially the same width as the main body of rod 53. It however,has between its ends side portions 64 extending inwardly across the ribs 56 and having inturned end portions 65 litting in slots 55- so as to make a sliding tongue and groove connection between it and the operating rod 53. Since the sides and ends of member 63 make sliding contact with the sides and ends of socket 59 any movement of shaft 53 longitudinally of the mandrel will positively move it outwardly or inwardly because of the inclined sliding tongue and grooves connection. It will be noted that the clamping member 63 has a straight edge parallel to and on the inner side of the straight edge of tongue 61 and that those two` edges may separate or come together by relative movement thus clamping the edge of a sheet between them or releasing it according to the direction of movement. This form like that of Fig. l permits the use of a sheet pattern having a full length straight line edge the central portion of which enters below tongue 6l and is securely clamped and held during and after winding so that the completely wound cone may have its rough ends severed smoothly and -accurately by a cutting edge pressing inwardly on it towards the mandrel while the cone and mandrel rotate so that the-finished cone may have an inner feathered edge.

Having thus described my invention, what l claim and desire to secure by Letters Patent is:

l. A device for winding a flexible sheet into the form of a cone comprising a mandrel having a conical outer surface on which the sheet winds the end portions of said mandrel being continuous circularly and a gripping mem-- ber extending longitudinally between said end portions `only having its outerfsurface in the lines of the conical surface of the mandrel and having slight relative rotary movement thereon to cooperate with the mandrel in gripping the central portion of the edge of the sheet or releasing it and means extending through the end of the mandrel for operating said gripping member to cause the rela'- tive rotary movement in either direction.

2. A device for winding a flexible sheet into the form of acone comprising a mandrel having a conical outer surface on which the sheet winds the end portions of said mandrel being continuous circularly and a gripping member extending longitudinally be` smooth against the inner surface of the tube.

3. A devicev for winding a flexible sheet into the form of a cone comprising a mandrel having a conical surface on which the sheet winds, the end portions of said mandrel being continuous circularly and releasable gripping means between said end portions only for laterally receiving, engaging and holding a straight edge of said sheet on a straight line longitudinally of said mandrel between the said portions and between the ends ofthe straight edge of said sheet whereby theends of the cone beyond said gripping means may be cut on straight transverse lines on a continuous supporting surface while held securely in position on the mandrel.

4. A device for Winding a flexible sheet into the form of a cone comprising a mandrel having a conical surface on which the sheet winds the end portions of said mandrel being continuous circularly having materially greater length than the finished cone and releasable gripping means between said end portions only on a longitudinal line for engaging and holding the central portion only of one edge-fof said sheet of full length during winding whereby the ends of said sheet when wound may be cut olf on straight transverse planes while the cone is held securely in position on the mandrel.

5. A device for winding a flexible sheet into the form of a cone comprising a mandrel having a conical surface on which the sheet winds, the end portions of said mandrel being continuous circularly, having ma- 55, said collar throughout its length to clamp and releasable gripping means between said end portions only on a longitudinal line for en aging and holding the central portion o y of one edge offsaid sheet of full length during `winding' whereby Ythe ends of saidl sheet when wound may be cut off on straighttransverse planes 4while the cone is held securely in position on the mandrel, the said gripping means having a surface which when moved from gripping to released position will by an ironing action, smoothly paste the previously gripped edge-to Athe interior surface ofthe tube.

6. A device for winding a flexible sheet into the form ofV a cone comprising Va mandrel having a conical surface on which the sheet winds, the end portions of said mandrel being continuous circularly and releasable gripping means between saidend portions only for laterally receiving, engaging andi-holding the edge of said sheet on a line extending longitudinally of said mandrel, the said gripping means having a surface which will, by movement after release from gripping position, vpaste the previously gripped edge smoothly tothe interior surface of the coneby an ironin action.

7. A device of the class described, for winding paper cone tubes, comprising a'mandrel having aligned longitudinally spacedconical end portions rigidly connected together by a conical portion of reduced diameter and a conical cnE or collar fitting saicd portion of reduced diameter between said end portions,- its outer surface Jforming with said end portions practically a-continuous cone having a longitudinal slot therein, means for causmg rotary movement of said collar on said man;

drel within fixedlimits in opposite directions, the said central portion having at one part of its periphery an inwardlydepressed Yportion having straight longitudinalfside edges, across which depression the slot in the sleeve is adapted to pass whereby the straight edge of a sheet of paper may be inserted in the slot when it is over the depressed portion, and that edge will be caught between an edge or tongue of the collar forming the slot and an edge of the longitudinal depression on relative rotation of the sleeveand mandrel.

8. A device of the class described` comprising a conical mandrel having thereon a collar between its ends which forms part of the conical surface and which /has a tively longitudinal slot therein, means for. rotawithm fixed limits, means permitting the edge of a sheet of flexible material to enter through said slot in one position and to extend a short distance alongits inner surface and means oh said mandrel within said collar -cooperating with one edge of moving said collar on said mandrel land hold the entering edge of said' sheet when the collar is turned in one direction on the mandrel.

9. A device of' the class described,- comprising a conical mandrel having thereon a collar between its ends which forms part ofl the conical surface and which has a Vlongitudinal slot thereinmeans fory rotatively movingsaid collar on said mandrel within fixed limits, means permitting 'the edgel of .a sheet of flexible material to enter through said-slot in onespositionsand to extend a short distance along'its inner ,surface and means on said mandrel within said collar -cooperating with one edge of said collar throughout its length to clamp and hold the entering edge of Said'sheet when the collar is turned in one direction on the mandrel and automatic yielding" p forms part of the conical surface and which lhas a narrow longitudinal 4slot therein for the entry ofthe edge of the sheet to be wound, means for rotatively moving said collar on said mandrel within fixed limits, vmeans rigid with said mandrel cooperating with one edge yof-said collar tol grip and securely hold the-edge of said sheet throughout the length of said collar when said collar 'is turned to proper position in one` direction. y v

11. A device of the class described for winding paper cone tubes, comprising a conical mandrel of greater length than the tube'to be wound having thereon a culi or collar between its ends of slightly less length' than the tube to be wound, which forms part of the conical surface and which `has a narrow longitudinal slot therein for the entry of the edge of the sheet to be wound, means for rot-atively moving said collar on said mandrel within fixed limits, means rigid with said mandrelcooperatin with one edge of said collarto grip' and securely hold the edge of said sheet throughout the length of said collar when said collar is turned to proper position in one direction and automatic means for yield'- n inglyf holding the parts in clamping position during winding. A p

12. A device of the class described for windingpaper Vcone tubes, lcomprising a tube to be wound havingy thereon a cui or collar between its ends of slightly less length than the tube to be wound', which formsV part of the conical surface and which has a narrow longitudinal slot thereiil for conical mandrel of greater length than'the 125 the entry Vof the edge of the sheet to beVV wound, means for rotatively moving said collar on said mandrel Within' fixed limits,

means rigid with said mandrel cooperating wth one edge of said collar to grip and securely hold the edge of said sheet throng io'ut the length of said collar when said collar is turned to proper position in one direction and automatic. means for yieldingly holding the parts in clamping4 position during winding, thevouter Surface of the other edgeof said slot being peripherally curved inward from circular lines so as'to resent. a rounded surface to engage an press the previously 'clamped edge of the sheet outwardly against the inner surface of the cone when the collar is given a' reverse rotary movement releasing the clam V'13. A device `of the class described for winding paper cone tubes, comprising a conical mandrel of greater length thanthe tubeto be wound, having thereon a cufl" or collar between its ends of slightly4 less securely hold the edge ofsaid sheet throughout the length of said collar when said collar is turned to proper position in one direction, the width of the slot and the ex# tent of rotary 'movement permitted being -v such that Lin the.reverse movement of the collar on the mandrel its otherl edge will progressively move to and .beyond the edge of the sheet pressing said edge smoothly against the inner surface of the cone.

.14. A cone winding device comprising a rotatable conical mandrel reduced in size at its central portion with substantial uniformity throughout most ofjits periphery but having an inwardly depressed `portion between adJacent longitudinal lines, a collar surrounding said reduced portion and extending throughout its length withits'outer I'surface forming a connecting continuation of the conical .end surfaces of the mandrel and having a longitudinal slot therein, a

central shaft extending into said mandrel from itsbase andl having thereon a lateral extension connected at 'its outer end to said collar and adapted to move in a slot in said mandrel in a rotary direction to a limited rotatable conical mandrel reduce extent which permits the collar to rotate on the mandrel sufficiently to carry its slot substantially across said depressed portion of the mandrel in either direction.`

15. A cone winding' device com rising a in size at its central portion with substantial uniy meaeae formity throughout most of its eriphery but havin an inwardly depresse portion between a jacent longitudinal lines, a collar surrounding said reduced portion and extending throughout its length with its outer surface forming aconnectingcontinuation of the conical end surfaces of the mandrel' and having a longitudinal slot therein, a central shaftv extending into said mandrel from its base and having thereon la lateral extension connected at its outer end to said collar and adapted to move in a slot in said mandrel in a rotary direction to a limited extent which permits the collar to rotate on the mandrel sufficiently to carry its slot substantially across said depressed portion of the mandrel in either direction, a hollow cylindrical rotary shaft surrounding said 4central shaft throughout a art of its length connected to said mandre at one end and mounted in stationary bearings.

16. A cone winding device comprising a rotatable conical mandrel reduced insize at its central portion with substantial unifrmity throughout most of its periphery but having an inwardly depressed portion between adjacent longitudinal lines, a collar surrounding said reduced portion and extending throughout its length with its outer surface forming a connecting continuation of the conical end surfaces of the mandrel and having a longitudinal slot'therein, a

central shaft extending into said mandrel from itsvbase and having thereon a lateral extension connected at its outer end to said collar and adapted to move in a slot in said vmandrel sufliciently to carry its slot substantially across said depressed portion of the mandrel in either direction with its edge at the edge of the depression, a hollow cylindri'cal rotary shaft surrounding said central shaft throughout a part of its length connected to said mandrel at, one end and mounted in sta'tionary bearings, a coiled spring under tension in said hollowrshaft connected at one end' to said hollow shaft and atthe .other end\ to said central shaft tending to 4hold the collar and vmandrel in clamping position.

17. A cone Winding device comprising a rotatable conical mandrel reduced in' size at its central ortion with substantial uniformity throng out most of its periphery but having an inwardly depressed portion between adjacent longitudinal lines, a collar surrounding said reduced portion and eX- tending throughout its lengthwith its outer surface forming a connecting continuation of the conica-l end surfaces of the mandrel and having a longitudinal slot therein, a central shaft extendi'n into said mandrel from its base and havingthereon a lateral extension connected at lits outer end to said collar and adapted to move in a slot in said mandrel sufliciently to carry its slot substanlos izo

ias

Maase@ tially across said depressed portion of the mandrel in either direction, a hollow cylindrical rotary shaft surrounding said central shaft throughout a part of its length connected to said mandrel at one end and mounted in stationary bearings, a coiled spring under tension in said hollow shaft connected at one end to said hollow shaft and at the other end to said central shaft tending to hold the collar and mandrel in clamping position, movable means adapted to act on the projecting end portion of the central shaft to turn said sleeve to-release position on said mandrel.

18. A device for winding a flexible sheet into the'form of a cone comprisingamandrel having a conical outer` surface on which the sheet winds, gripping means between the end portions of said conical surface including a comparatively thin tongue having a straight longitudinal lend edge the outer surface of which is in the lines of the conical mandrel the material of the conical surface being depressed from the ends of said' tongue edge longitudinallyy for a short distance whereby the central portion of the straight edge of a sheet of fulllength may be inserted under said straight edge by a.

movement of said sheet at right-angles tov said edge and means adapted to clam said sheet ed e to the vunder surface o said tongue e ge.

19. .A device for winding a flexible sheet into the form of a cone comprising a mandrel having a conical outer surface -on which Ithe sheet winds gripping meansbetween the Vend portions of said conical Surface includ-' ing a comparatively thin tongue having a position.

straight longitudinal end edge the outer surface of which is inthe lines of the conical mandrel the material of the conical surfacel being depressed from the ends of said tongue edge longitudinally for a short distance wherebythe central portion of the straight edge of a sheet of full length may be inserted .under said straight edge by a movement of said sheet' at right angles to said edge and means adapted .to clamp said sheet edge to the vunder Surface of said tongue edge and y'elding'means for holding it in clamped 20. A device of. the glass described for and lie under its edge while the en signature.

face of said mandrel at the ends of said' slotv being depressed for a short distance longitudinally to permit the central portion of the full length straight edge of the sheet to be wound to enter laterall1 the slot portions .of said sheet edge lie on the conical end portions of the mandrel, means for rotatively moving said collar on said 'mandrel within fixed limits, means rigid with said mandrel cooperating with one edge of said collar to grip and securely -hold the edge of said sheet throughout the length of sald collar when said collar is turned to proper position in one direction.

. 21. A device of the class described for winding cones from a flexible sheet comprising a mandrel having a conical outer surface and gripping means along the central longitudinal portion of said conical surface between its end portions'for laterally receivin and securely holding thereon the centra portion `of a straight edge of saidA sheet extending beyond t e ends of saidl gri ping rfneans longitudinally of said comca surace.

22. A device for winding a flexible sheet having straight edges into the form of a cone, comprising `a mandrel having a conical surface on which the sheet winds, the end ortions of said mandrel having outer suraces which are continuous circularly, and gripping means extendin Vlongitudinally of the mandrel between sai end portions only, adapted toreceive, engage and hold the central portion only of a straight edge ,of said sheet when said edge is moved laterally into gripping position, the said gripping means engaging `said 'edge Wlth substantlal umformity throughout the length of said grip- 4 ping means.

In testimony whereof I hereunto aixmy GIBSON H. KENNEDY.

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