US2259959A - Machine and method for making paper-wrapped pencils - Google Patents

Description

K. MILLER 2,259,959

MACHINE AND METHOD FOR MAKING PAPER-WRAPPD PENCILS Filed Dec. 12, 1940 6 Sheers-Sheet l Oct. 2l, 1941.

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MACHINE AND METHOD FOR MAKING PAPER-WRAPPED 'PENCILS 'Oct 21, 1941.

6 Sheets-Sheet 2 Filed Dec. l2, 1940 K. MILLER 2,259,959

MACHINE AND METHOD FOR MAKING' PAPER-WRAPPED PENCILS Oct. 21, 1941.

Filed Dec. 12, 1940 6 Sheets--SheefI 5 All' K. MILLER 2,259,959

WRAPPED PENCILS Oct. 21, 1941.

MACHINE AND METHOD FORy MAKING PAPER- Filed Dec. l2, 1940 6 Sheets-Sheet 4 INVENTOR J4 ef K. MILLER 2,259,959

MACHINE AND METHOD 'FOR MAKING PAPERWRAPPED 'PENCILS Oct. 21, 1941.

Filed Dec. 12, 1940 6 Sheets-Sheet 5 ATTORNEYS K. MILLER 2,259,959

MACHINE AND METHOD FOR MAKING PAPER-WRAPPED PENCILS Oct. 21, 1941.

Filed Dec. l2, 1940 6 Sheets-Sheet 6 Patented Oct. 21, 1941 MACHINE AND ME'rnoD Fon MAKING PAPER-WBAPPED rENcn.s

Kay Miller, New Brunswick, N. J., Joseph Dixon Crucible Company,

assignor to Jersey City,

N. J., a corporation oi' New Jersey Application December 12, 1940, serial No. 369,189

6 Claims.

The invention relates to an improved machine for and a novel method of wrapping a straight, elongated implement in a sheath composed of a spiral of flexible material, the coils of which are inseparably secured together. More particularly, the invention is an improvement in machines and methods for making paper wrapped pencils, having a core of fragile marking material, such as graphite or the like, enclosed in a substantially homogeneous sheath composed of coiled paper, with the convolutions of the paper inseparably glued together.

One object of the invention is to provide a machine of this character by which the fragile, elongated core of marking'materlal may be rapidly enclosed, without liability of breakage, in a sheath composed of alternate coils of paper and glue, so tightly wound together that the paper and glue constitute a substantially homogeneous body so as to be amenable to cutting by a knife or mechanical rotary pencil Sharpener. A further object of the invention is the provision of' a novel method of wrapping tightly around a fragile elongated core without liability of breakage successive alternate coils of paper and glue so as to produce a sheath in which the successive coils of paper are substantially in contact with each other whereby there results a substantially homogeneous body resembling high grade Wood commonly used as pencil sheaths. To these ends the invention consists in the improved method and pencil wrapping machine hereinafter fully described and particularly pointed out in the appended claims.

In the accompanying drawings illustrating a preferred form of wrapping machine by which the novel method may be expeditiously performed, Fig. 1 is a top plan view of the pencil wrapping machine; Fig. 2 is a front side elevation of the parts shown in Fig. 1; Fig. 3 is a longitudinal, vertical section taken on the line 3-3 of Fig. 1; Fig. 4 is a detail of the right hand end of the parts shown in Fig. 3, but showing the core wrapping members in a different position of operation; Fig. 5 is a longitudinal section taken on the line 5--5 of Fig. 4; Fig. 6 is a detail section of the lower portion of the parts shownin Fig. 4, but showing the core wrapping members in the positions assumed by them following the feeding of a fresh strip of paper into the machine, with the toe of the wrapper holding shoe about to press the forward end of the wrapper against the lower wrapping drum; Fig. 7 is a detail of the lower portion of the parts shown in Fig. 6, but showing the position of the parts after the shoe Y has pressed the wrapper against the lower wrapping drum, a pencil core having been fed into the machine and the wrapper advanced to the core; Fig. 8 is a horizontal section on an enlarged scale, taken on the line 8-8 of Fig. 3; Fig. 9 is a transverse section on an enlarged scale, taken on the line 9-9 of Fig. 4, through the paper cutting blades; Fig. 10 is a detail section similar to Fig. 7, but showing the wrapping members in the position assumed by them in the next step of the core wrapping operation; Fig. 11 is a view similar to Fig. 10, but showing the position of the wrapping members when the forward end of the wrapper has been coiled once around the core; Fig. 12 is a view similar to Figs. 10 and 11, but showing the position of the wrapping members at the completion of the core wrapping operation; Fig. 13 is a view similar to Fig. 12, but showing the completely wrapped core in the act of being discharged from the wrapping members; 'and Figs. 14, 15 and 16 are enlarged details taken from Figs. 10, 11 and 12, respectively, to show more clearly the successive steps in the coiling of the wrapper around the core.

The improved pencil wrapping machine, as illustrated in the drawings, comprises an upper roll or drum 20 and a lower roll or drum 2|. The drums 20 and 2| are somewhat longer than the pencil core or other straight, elongated implement, indicated at 22, to be wrapped in a plurality vof convolutions of alternate layers of paper and glue or other adhesive. The wrapping of the core is performed by the drums 20 and 2| by means of a belt or web 24, substantially as long as the drums, one end of which is secured to the upper drum 20 and the other end of which is secured to the lower drum 2|. The sheath to be formedaround the core consists of a strip of suitable, flexible material 25, such as paper, coiled spirally around the core with interposed spirals of glue taken from a glue supply 26 contained in a tank 2l.

The strip of paper 25 is fed into the machine from a convenient-source by means of the paper advancing rolls 29 and 30. When the proper length of the paper wrapper has been advanced by the rolls 29 and 30, the paper is-cut by the rotatable cutter 3|. The length of paper constituting the wrapper to be coiledyabout the pencil core 22 is fed down to a position above the lower drum 2| through a chute 32, as indicated in Fig. 6. The advancing forward end of the paper wrapper may, or may not, depending on the flexibility of the paper, fall downwardly onto the upper surface of the lower drum 2 But in either case, when the requisite length paper has been fed into the machine and is in the act of being cut by the rotatable blade 3|, the toe end of an arcuate, pivotally mounted shoe 33 descends upon the section of the wrapper above the lower drum 2|, as indicated in Fig. 6, to hold the forward end of the wrapper. Immediately thereafter the Whole shoe descends upon the forward end of the wrapper against the portion of the web 24 then uppermost on the drum 2| as indicated in Fig. 3.

Just previous to these movements, a bail 28 is swung in counter-clockwise direction to draw the web tightly about the lower drum 2| and by pulling downwardly on the part of the Web extending from the upper drum 20, complete the forming of a core-receiving loop or pocket 34 therein, as shown in Fig. 4. The bail is then swung out of the way and the pocket assumes the condition shown in Fig. 6, ready to receive the pencil core 22. Since the lower part of the drum 2| and the web 24 thereon rotates in the bath 26 of glue, the under surface of the forward end of the wrapper 25 adheres to the glue-bearing surface of the web 24 when the shoe 33 rises, so that the advancing edge of the wrapper will lbe moved under the core 22, which in the meantime has been fed into the pocket 34 from a hopper 35.

After the core 22 has been fed into the pocket 34 of the web 24 and the forward edge of the wrapper 25 has been moved forward so as to come under and lift the core, as indicated-in Fig. 7, an elongated pocket closing blade 31 is swung against the web 24 just above the core 22 so as to fold the web loop 34 about the forward advancing edge of the paper wrapper and the core, as indicated clearly in Figs. and 14. The pocket closing position of the blade 31 is fixed, and the space between the upper section of the web 24 and the wrapper 25 adhering to the portion of the web in contact with the lower drum 2l is just suicient to permit the paper 25 to pass between the two sections of the web during the wrapping of the paper around the core. Substantially simultaneously with the moving of the blade 31 into contact with the outer side of web 24, a glue displacer or raiser in the form of an elongated rectangular box 38 descends into the supply of glue 26 and raises the level 39 thereof above the pocket 34 enclosing the core 22 and the portion of the paper being wrapped around it, so that throughout the core wrapping operation, the successive layers or coils of paper have glue applied to both sides thereof. The paper, preferably partially charred newsprint, being porous and the pocket 34 enclosing the core 22 and the spirals of paper wound around it, being as tight as it is possible physically to tighten the web 24, it will be understood that all surplus glue is squeezed out from between the successive coils or spirals of the paper and that the glue left between them is that which sinks into the pores of the paper and a hardly perceptible coating on the surface of the paper, with the result that there is substantially only a paper to paper contact in the successive coils or spirals of paper, it being understood, of course, that the glue left on the surface of the paper is just sumcient to cause the coils to inseparably adhere together.

The tight closing of the web and the coiling of the paper wrapper about the core is accomplished by the travel of the web 24 from the drum 2| to the drum 20, the web being unwound from the .drum 2l and wound around the drum 20, as clearwrappedl pencils or other implements to the next point inthe series ofoperations to be performed upon them.

The web 24 by means of which the paper Wrapper 25 is wound or coiled tightly around the fragile pencil core 22 is preferably composed of a flexible material capable of being formed into a. loop small enough to engage snugly therelatively small pencil core and a single coil of paper, as shown in Figs. 14 and 15. It is essential, however, that the frictional engagement between the glue-covered paper and the pencil core be greater than the friction between the paper and the web 24 so that when the advancing forward edge of the paper during the travel of the web on the lower drum and around the core reaches the point (Fig. 14) where the web leaves the core, the paper remain in adherence with the core rather than with the web. This mode of operation is secured by choosing the proper material for the web, such as a good quality of duck fabric.

During the winding of the paper wrapper around the pencil core in the pocket 34 by means of the travel of the web from drum 2| to drum 20, as shown in Figs. 10 to 12, and more clearly in Figs. 14 to 16, the blade 31 maintains a fixed relation to the lower drum 2 I, leaving only enough opening into the pocket 34 to permit the paper to enter the pocket while preventing the exit of the core therefrom during the winding operation which is carried out by keeping the pocket tight upon the paper by the upper drum pulling the web from the lower drum, which is put under a retarding brake pressure as soon as the blade 31 closes the pocket. Accordingly, as successive coils of paper are applied to the sheath being built up around the core and the sheath progressively grows in size, the loop or pocket must grow in size to accommodate itself to the growing sheath; all as clearly shown in Figs. 14 to 16. At the same time, the web must not stretch longitudinally and contract laterally during the wrapping operation since this action might result in the formation of wrinkles in the web and in the paper. But the web beingcomposed of textile fabric is necessarilyslightly stretchable, I therefore put the web under somewhat greater pulling force as the pocket is being closed upon the core and before the first coil of paper is completely around the core than is exerted during the wrapping operation. 'I'his action results in a prestretching of the web, so that it will remain at the same width during the building up of the sheath.

The construction of the machine parts and the driving mechanism therefor by which this series of steps or operations is performed will now be described in detail:

The core wrapping elements and their actuating mechanism are mounted on a frame consisting of two vertical, longitudinally extending walls, a front side wall 44 and a rear side wall 45. The upper drum 20 is journaled at its ends in uprights 4B and 41 rising from the frame walls 44 and 45, respectively. On the rear end of the shaft of drum 20 which projects beyond the upright 41 is mounted a sprocket 49 over which passes a chain 50, one end of which extends downwardly and carries at its extremity a counterweight 5|. The other end of the chain 50 is pivotally connected with the upper end of an arm 52, the hub 48 of which is pivoted on a rod 53 fixed at its outer ends in the frame extensions 54 and 55. The arm 52 carries a cam roll 51 which is held against the Working periphery of a cam 58 by means of the counterweight 5|. 'I'he cam 58 is secured to a cam shaft 59 journaled at its ends in the frame extensions 54 and 55, and the rear projecting end of the cam shaft 59 carries a worm gear 68 driven by a worm 6| actuated by a motor, the outline of which is indicated at 62 in Fig. 1. The cam shaft 59 is driven in constant rotation by means of the motor 62.

The lower drum 2| is iixedly mounted at one end on a shaft 64 which projects about two-thirds of the way into the drum.2|, as shown in Fig. 5. The shaftv84 is journaled in a boss carried by the front wall 44. On the projecting forward end of the shaft 64 is mounted a sprocket 65 over which passes a chain 66, the free lower end o f which carries a counterweight 61. The other end of the chain 66 is pivotally connected with the upper end of an arm 68, the hub 69 of which is pivoted on the rod 53. The arm 68 carries a cam roll 18 which is held against the working periphery of a cam 12 fixedly mounted on the cam shaft 59 by the counterweight 61.

The bail 28 is a straight member somewhat longer than the lower drum 2| and is provided at one end with an offset arm 14 which is loosely mounted on the shaft 64 and at the other end with an offset arm 15 which is xedto a shaft 16 journaled in a boss 11 projecting from the rear frame wall 45. The inner end of the shaft 16 is loosely received in the drum 2|. The rear projecting end of the shaft 16 carries a sprocket 19 over which passes a chain 88, the downwardly extending end of which carries a counterweight 8|. The other end of the chain 88 is pivotally connected with the upper end of a curved arm 82, the hub 83 of which is pivoted on the rod 53. The arm 82 carries a cam roll 84 which is held against the working periphery of a cam 85 by means of the counterweight 8|.

The paper feeding rolls 29 and 38 are jour naled in the upper offset ends of uprights 81 and 88 extending upwardly from the right hand ends of the frame walls 44 and 45, respectively. The rear end of the shaft 89 of the upper feed roll 29 projects beyond the upright 88 and carries a spur gear 98 which meshes with and is driven by a spur gear 9| mounted on the rear end of the shaft 92 of the lower feed roll 38. On the forward end of the shaft 92 is loosely mounted a sprocket wheel 93 over which passes a chain 95, the free downwardly extending end of which carries a counterweight 96, the other end of the chain 95 is pivotally connected with the upp er end of an arm 91, the hub 98 of which is pivoted on the rod 53. The arm 91 carries a cam roll 99 held against the working periphery of a cam |88 mounted on the cam shaft 59 by the counterweight 96. On the outer forward end of the feed roll shaft 92 is loosely mounted a ratchet wheel |02, fixed to the sprocket 93, and which is engaged by a spring pressed pawl |03 pivoted 0n the outer end of an arm |84 xed on the forward extremity of the feed roll shaft 92.

. 'Ihe arrangement is such that when the arm 91 is swung to the left, facing Fig. `2, under the action of the cam |88, the chain 95 turns the sprocket 93 and the ratchet wheel |82 in a counterclockwise direction and through the paw1 |83 turns the arm |84 in a counterclockwise direction, thereby turning the lower feed roll 38 in counterclockwise direction and the upper feed roll in clockwise direction to feed a length of paper into the paper chute 32. When the requisite length of paper has been fed into the machine, which is when the high point of the cam |88 passes over the cam roll 99, and the counterweight 96 then functions to pull .the chain 95 and the arm 91 to the right, the frictional engagement between the paper and the vrolls 29 and 38 being greater than the frictional engagement between the teeth on the'ratchet wheel |82 and the spring-pressedpawl |83, the teeth |82 of the ratchet pass under the pawl while the weight 96 returns the sprocket 93 and ratchet |82 to initial or normal position.

fed down into the chute 32, itis cut transversely at its upper end. The paper cutting devices are arranged transversely of the length of paper and comprise lthe rotary cutter 3| which in general form is a hollow cylinder, solid at its two ends (as seen in Fig. 9) and having a wide opening or mouth in its front side, that is, the side toward which the paper advances, and a narrow slot |86 in the opposite side, the upper outer edge |81 of which constitutes a cutting blade (see Fig. 4). The cylindrical cutter member 3| is arranged to oscillate in a hollow cylindrical stationary cutter member |88, which like the cutter 3| has a wide opening in its front side and a narrow slot |09 in its other side. The inner edge ||8 of the lower section of the cutter member |88 serves as the stationary cutter edge with which the movable.

cutter edge |81 cooperates to shear the paper. The hollow cylindrical cutter member |88 is secured in a housing ||2 which in general form is a hollow cylinder mounted in'the upper ends of the uprights 81 and 88. The housing ||2 has a wide opening in its front side and on its other side a pair of downwardly extending lips ||4 spaced apart to receive the upper end of the paper chute 32. y

The solid ends of the rotary cutter 3| are provided with the trunnions ||5 and ||6 journaled in the uprights 81 and 88. On the outer end of the trunnion ||6 is secured an arm ||1. The contraction spring ||8 attached at its lower end to the arm ||1 and at its upper end to the upper extremity of a finger I9 rising from the upright 88 turns the rotary cutter 3| in clockwise direction, which movement is limited by the stop pin |28, thereby holding the rotary cutter in normal, uncutting position with its slot |86 in alinement with the slot |89 in the stationary cutter member and the passageway through the chute 32, as shown in Fig. 4. When the outer end of the arm v ||1 is depressed, as will be presently explained,

the rotary cutter is turnedin counterclockwise direction to bring its cutting edge |81 against the paper and against the edge ||8 of the stationary cutter |88 so as to sever the paper as shown in Figs. 3 and 6.

A completely wrapped core having been discharged by drawing the section of web extending between the drums 28 and 2| taut (through the turning of the drums), the upper and lower drums are not turned in counterclockwise direction through the actionv of their respective cams until they are initial positions, as shown in Figs. 4 and 6. The upper end |2| and the lower end |22 `oi? the web are let into slots in the drums and the positions of these ends make it convenient to follow the movements of the drums during the steps of the core wrapping operation. While the drums are assuming the positions shown in Figs. 4 and 6, the bail 28 is swung counterclockwise into contact with the section of web extending between the drums to form the pocket or loop 34 therein. The bail then returns to normal position as the paper is being fed down the chute 32 When the requisite length of paper has been.

and before the forward end thereof reaches a position over the lower drum so as not to strike the paper in case its forward end should decline onto the lower drum.

While the bail 28, having formed the loop, is returning to inoperative position (Fig. 6) and the .next wrapper length of paper is being fed down the chute 32, the hopper 35, carrying at its lower end the shoe 33 and also from its forward side the adjustable screw |24, is descending, with the result that when the forward end of the wrapper is above the web covered upper surface of the lower drum 2 I the toe of the shoe descends upon the forward end of the wrapper to hold it against the drum and substantially ysimultaneously therewith, the screw |24 strikes'r the free end of the arm ||1, thereby depressing it and turning the rotary cutter to sever the paper (Fig. 6), immediately after which the heel of the shoe 33 is brought down against the rest of the forward end of the wrapper and presses it against the portion of the web 24 uppermost on the drum 2|, as shown in Fig. 3. The hopper then rises to the position shown in Fig. 4. The disengagement of the screw |24 from the arm ||1 permits the spring ||8 to return the rotary cutter to the position shown in Fig. 4, with its slot |06 in alinement with the slot |08 and the opening through the chute 32 to permit the next length of paper to pass down the chute. As the rotary cutter 3| returns to inactive position, the lower side of the slot |06 moves the forward end of the new length of wrapper into position to be fed down the chute.

The hopper 35 is a vertically and transversely arranged rectangular box-like structure somewhat wider than the length of the cores 22 it contains. The hopper 35 is xed in a U-shaped frame |25 which slides vertically by means of a dove-tail connection with the forward sideof the transversely-extending vertical plate |25 supported from the forward upper edges of the uprights 45 and 41. The side walls |21 of the U-shaped Vframe |25 are each provided with an outwardly extending stud |28 on the outer end of which is pivoted the lower end of a link |29, the upper end of which is connected with the forward end of a lever arm |3| secured at its rear hub end |30 to an end of a shaft |32 rotatably mounted in bearings |33 (Fig. 1) supported from the upper end of the uprights 46 and 41. The shaft |32 is oscillated in one direction by means of an arm 34 the hub |35 of which is fixed on the shaft |32 between the bearings |33. The free end of the arm |34 is connected with the forward ends of two links |31, the rear ends of the links being pivotally connected with the upper ends of upright twin arms |38, the hubs |33 of which are loosely mounted on the rod 53. A collar |40 is interposed between the rear ends of the links |31. The arms |38 carry betwen them a cam roll |4| which bears against the working periphery 0f a cam |42. The hopper is positively lowered into the position shown in Fig. 3 by means of the cam |42, and is raised into the position shown in Fig. 4 by means of a contraction spring |43 one end of which is secured to theupright 41 and the other end of which is secured to an arm |44 extending outwardly from the rear arm |3|.

The lower end |46 of the hopper 35 is contracted so as to permit of the passage therethrough of the cores in single file only, as shown in Figs. 3, 4 and 6. The lower end of the ccn-l tracted hopper neck |46 discharges into a horizontally 'disposed guide-way |41 in which re ciprocates a fiat slide |48 slightly thicker than a core and having a transversely arranged corereceiving slot |43. When the hopper is in raised position, as shown in Fig. 4, the slot |43 in the slide |48 is in alinement with the passageway in the hopper neck and receives from it the lowermost core. When the hopper is lowered to thev position shown in Fig. 3 with the shoe 33 pressing the forward end of the wrapper against the upper surface of the drum 2|, the slide |48 is pulled forward to aline the slot |48 with a core chute |5| extending downwardly from the under side of the guide |41 so that the core in the slot |49 is discharged down into the loop 34, as shown in Fig. 3.

'I'he shoe 33 is a concave member substantially as long as the lower drum 2| and is provided on its upper surface with two upwardly extending arms |53 pivotally connected just above the upper surface of the shoe 33 with the outer ends of twoV supports |54 extending downwardly from the forward side of the core chute |5|. The upper ends of the arms |53 are loosely articulated by a pin and slot connection |51 with the arms |55 extending forwardly from the front side of the lslide |43. The upper extremities of the arms |53 are connected with the hopper neck |48 by contraction springs |56 which normally hold the parts governed thereby in the positions shown in Fig. 4, with the slot |43 in slide |48 under the opening of the hopper neck |46 and with the shoe 33 canted, that is to say, with the rear or toe end of the shoe at a lower level than the forward or heel end. By reason of this arrangement, when the shoe'descends upon the wrapper on the lower drum 2|, as shown in Fig. 6, the toe end of the shoe strikes -the wrapper rst; then as the hopper continues to descend the shoe 33 is caused to pivot on the supports |54, with the result that the slide |48 is pulled outwardly, bringing the slot |48 into alinement with the core chute |5| so as to discharge a core into the loop 34. 'I'he pulling of the slide |48 forwardly brings the rear end thereof under the open mouth of the hopper neck |45 to hold back the cores in the neck until the slide is again returned to the position shown in Fig. 4. The adjustable screw |24sis carried on the outer end of an arm |58 extending forwardly from the rear wall |21 of the U-shaped hopper support. y

While the shoe 33 is pressing the forward end of the wrapper against the web on the upper side of the lower drum 2|, there is a temporary pause in the turning of the upper and lower wrapping drums, but immediately the shoe 33 rises from contact with the wrapper, the drums start to rotate in counter clockwise direction. When the turning of the lower drum brings the forward edge of the wrapper under the core 22, as shown in Fig. 7, the loop closing blade 31 is swung into contact with the web to form a narrow-mouthed pocket around the forward end of the wrapper and the core, as shown in Figs. 10 to 14. The blade 31 is about as long as the web is wide, as seen in Fig. 5, and is fixed on a shaft |60 journaled in the frame walls 44 and 45. On the forward end of the shaft |50 is fixed an upright arm |6| with the upper end of which is connected the forward end of the link |62 the other end of which is connected with the lower end of an arm |63 secured to the outer end of a shaft |54 journaled at its extending arm |66, the outer end of which carries a cam roll |68 which bears against the working periphery of cam |69 (having the shape of a gibbous moon) fixed on the cam shaft 59.

The hub |65 also serves as the hub of a forwardly extending arm |10, the forward offset end of which terminates in a shoe-like extremity |1| secured to the upper surface of the box-like glue raiser or displacer 38. The engagement of the round part of the periphery of the cam |69 with the cam roll |68 serves to hold the blade 31 and box 38 in inactive positions. When the flat part of the cam |69 moves opposite the cam roll |68, a contractionv spring |13v connected at one end with the arm |63 and at the other end with the frame extension 64 acts to move the blade 31 and the box 38 into active positions, as shown in Figs. to 12. It will thus be understood that the blade 31v and the glue displacer 38 move simultaneously into and out of active and inactive positions.

The glue reservoir 21 is a trough-like structure having a bottom |15, front end |16 and rear end |11', all of which extend transversely from the frame wall 44 to the frame wall 45 which constitute the two lateral sides of the reservoir, as will be understood by reference to Fig. 5. V

'I'o assist in exerting suilicient tension on the I web as it passes around the working edge of the blade 31 in coiling the paper in successive convolutions around the core 22 in the pocket 3.4 and to assure the squeezing out of all surplus gluefrom between the successive convolutions, brake friction is imposed on the drum 2l. On the outwardly extending end of the shaft 64 is xed a brake drum |18 surrounded by a brake band |19 secured at one end by a pin |8| to the frame wall 44. The other end of the brake band is fastened to one end of a rod |82 the other end of which is connected with the link |62 at the point at which it is connected with the arm |63. The arrangement is such that when the link |62 is pulled to the left (viewing Fig. 2) by the arm |63 through the action of the spring |13 to swing the blade 31 against the web, the rnd is simultaneously pulled to the left to tighten the brake band on the brake drum and thereby impose the necessary drag on the lower wrapping drum.

T'he improved machine described above is a preferred form. although other forms have proved satisfactory for carrying out the lnovel method. The important feature seems to be the exertion of sufficient pressure on one end of a glue smeared paper wrapper and the graphite core to cause the glue to enter not only the pores of the paper but also the pores of the graphite core so 4that the glue between these surfaces is in its maximum sticky state. causing the paper to adhere to the core rather than to the sides o'f the pocket as the paper is coiled by the pocket around the core, and then continuing the pressure on the successive coils of paperto squeeze out the surplus glue from between paper coils, so that there is produced a sheath composed of a substantially solid mass o f paper. By properly treating the paper, preferably newsprint, before wrapping it around the core, as by partially charring it, the resulting sheath closely resembles the usual wood sheath, but is cheaper to produce and of more uniform quality. The glue employed may be any preferred. kind. Satisfactory results are obtained by using sodium silicate of an alkali-silicate ratio of about 1 to 3.22 diluted with water to a specific gravity 011.3.

'I'he novel method herein disclosed of wrapping successive and alternate coils of paper or other flexible sheet material and glue about an elongated core consists in providing a web of flexible material substantially as wide as the length of the core and the width of the wrapper to be coiled around it, forming a transverse, openmouthed pocket in the web, introducing the core into the pocket, introducing the forward end of a wrapper into the pocket and under the core, closing the mouth of the pocket sufficiently to prevent exit of the core but permitting the feeding of the wrapper into the pocket, drawing the two ends of the web taut to cause theinner sides -of the pocket to embrace the core and wrapper tightly, immersing the pocket and core into glue and then causing the web to travel in the direction in which the forward end of the wrapper entered the pocket while exerting av drag on the other end of the web so that the successive coils of paper will be wrapped so tightly .on the preceding coils as to cause the glue to enter the pores of the paper while the successive coils of paper are brought into substantially paper topaper contact, whereby the coils of paper are caused to adhere inseparably together, thereby producling a substantially homogeneous body resembling straight-grained wood easily cut by a knife or rotary Sharpener.

Having thus described the invention, what I claim as new is:

1. In a machine for winding successive, alternate coils of paper wrapper and glue around an elongated core, a first drum, a second drum, a textile fabric web substantially as wide as the core is long extending from one drum to the other, means for turning the first drum in both directions, means for turning the second drum in both directions, said drum turning means acting independently of each other so that-the section of web extending between the drums is sometimes taut, and at other times loose with a transverse open-mouthed core-receiving pocket therein, means for depositing a core in the pocket, means for feeding a wrapper to the first drum, the partial turning of the rst drum bringing the forward edge of the wrapper under the core therein, a blade arranged transversely of the web at a point to one side of the mouth'of the pocket, means for moving the blade toward the first drum to act in conjunction therewith to partially close the mouth of the pocket to prevent the exit of the core from the pocket but permitting the continued passage of the wrapper thereinto, means for immersing the pocket, and the core with the part of the wrapper in contact with the core in glue, the means for turning the secondl drum serving to pull the web over the edge of the blade to tighten the pocket upon the core and the portion of wrapper thereon so that the travel of the web will cause the core and the portion of wrapper thereon to rotate to wind the wrapper in successive coils around the core, and means for braking the turning of the rst drum so as to exert a pull on the webin the direction opposite to its travel.

2.. In a machine for winding successive, alternate coils of paper wrapper and glue around an times loose. forming a transverse open-mouthed core-receiving pocket therein, means for introducing a core into the pocket, means for feeding a wrapper to the pocket to bring its forward edge under the core therein, means for partially closing the mouth of the pocket to prevent the exit of the core therefrom but permitting the continued passage of the wrapper thereinto, means for immersing the pocket, and the core with the part of the wrapper in contact with the core in glue, the web moving means serving to exert a pull on the web in the direction of the feed of the wrapper to close the sides of the pocket about the core and the part of the wrapper in contact therewith, the travel of the web in the direction of the feed of the paper serving to cause the core and the wrapper in contact therewith to be rotated to wind the wrapper in successive coils around the core, and brake means acting on the web in the opposite direction to tighten the sides of the pocket upon the core and the coils of wrapper wound thereon.

3. In a machine for winding successive, alternate coils of paper wrapper and glue around an elongated core, a textile fabric web substantially as wide as the core is long, means for forming a transverse open-mouthed core-receiving pocket in the web, means for depositing a core in the pocket, means for feeding a wrapper to the pocket to bring the forward edge of the wrapper under the core therein, means for partially closing the mouth of the pocket to prevent the exit of the core therefrom but permitting the continued feeding of the wrapper thereinto, means for immersing the pocket, and the core with the part of the wrapper on the core in glue, means for moving the belt in the direction of the feed of the wrapper to bring the inner sides of the pocket tightly upon the core with the wrapper thereagainst, the travel of the web serving to rotate the core and cause the wrapper to be wound in successive coils about it, and means for' exerting a retarding drag on the web to increase the pressure of the pocket upon the core and coils of paper.

4. In a machine of the character described, two drums spaced apart, a web extending from one 4drum to the other, means for turning the drums independently of each other in both directions to make the section of web extending between them sometimes taut, and at other times loose to form a transverse open-mouthed core-receiving pocket therein, means for depositing an elongated core in the pocket, means for feeding a wrapper to the first drum to bring its forward edge into contact with the portion of web thereon, the partial turning of the first drum introducing the forward edge of the wrapper into the pocket and below the core, means for partially closing the mouth of the pocket to vprevent the exit of the core therefrom but permitting the continued passage of the wrapper thereinto, the drum turning means when moving the web in the direction of the feed of the wrapper serving to tighten the sides of the pocket upon the core and the part of the wrapper thereon to wind the wrapper in successive coils around the core, and means for immersing the pocket in glue duringv the coiling of the wrapper around the core.

5. The method of winding alternate coils of paper and glue around an elongated core to form a sheath thereon, which consists in forming a transverse open-mouthed core-receiving pocket in a traveling web substantially as wide as the core is long, smearing the upper surface of the portion of the web advancing to the pocket with glue, introducing a core and the forward end of a paper wrapper into the pocket with the forward margin ofthe paper between the core and l the inner wall of the pocket, the remainder of the paper wrapper temporarily adhering-to the glue-smeared surface of the web, closing the mouth of the pocket sufciently to prevent the exit of the core from the pocket but permitting the passage of the paper into the pocket, im'- mersing the pocket and its contents in glue, exerting a drag on the part of the web traveling toward the pocket while exerting a pull on the part of the web leaving the pocket so as thereby to cause the inner surface ofthe pocket to embrace tightly first the core and the first coil of paper and glue thereon and thereafter the successive coils of paper and glue until the wrapper is completely wound around the core.

6. A machine for wrapping successive, alternate coils of paper and glue around an elongated core to form a sheath therefor comprising, a hopper for containing the cores, a web substantially as wide as the core is long, a first drum to which one end of the web is attached, a second drum spaced apart from the first drum and to which the other end of the web is attached, means for turning the drums in both directions independently of each other so that at times the section of the web extending from one drum to the other is taut, and at other times loose with a full coil of web wrapped around the first drum, `the loose section of web between the drums forming an open-mouthed core-receiving pocket adjacent the first drum, means for feeding a strip of paper substantially as wide as the web at an angle to the first drum so that the advancing edge of the paper is above the first drum, a tilted clamping shoe pivotally mounted on the hopper, means for lowering the hopper so that the toe end of the shoe presses the forward edge of the wrapper against the portion of the web on the upper part of the first drum, means for cutting the paper, the continued descent of the shoe bringing the full length thereof against the wrapper and drum, means for raising the hopper, means controlled by the shoe as it contacts against the wrapper for releasing a core from the hopper to permit it to drop into the pocket in the web, the partial turning of the first drum bringing` the advancing edge of the wrapper into the pocket and under the core therein, a blade movable toward the first drum for contacting the web to close the mouth of the pocket to less than the diameter of the core but greater thanl the thickness of the wrapper, means for immersing the pocket in glue, means' for exerting a retarding drag on the first drum, the turning of the second drum serving to tighten the section of web between the drums as the web unwinds from the first drum, passes over the edge of the blade and winds up on the second drum, thereby causing the portion of the web forming the pocket to wind the wrapper and glue tightly around the core and around the successive coils of paper so that there is substantially paper to paper contact in the sheath.

KAY MILLER.

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