US1614643A - Tube-forming machine - Google Patents

Description

Jan. 18 1927.

W. E. BARLOW TUBE FORMING MACHINE Filed March 12, 1925 1 Sheets-Sheet l Jan. 18, 1927.

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W. E. BARLOW TUBE FORMING MACHINE Filed March 12, 1925 15 Sheets-Sheei 14 Jan. 18, 1927. WD-E. BARLOW I TUBE} FORMING MACHINE Filed March 12 925 15 SheetsSheet 15 Patented Jan. 18, 1927.

UNITED STATES PATENT OFFICE.

WILLIAM E. BARLOW, OF TREVOSE, PENNSYLVANIA, ASSIGNOR TO DAIRY EQUIP- KENT AND CONTAINER COMPANY, OF'DOVER, DELAWARE, A CORPORATION 01 DELAWARE.

TUBE-FORMING MACHINE.

Application filed March 12, 1925. Serial No. 14,990.

My invention relates to certain improvements in machines for making frusto-conical tubes of paper, or similar material, which are used, particularly, in. the manufacture 'of paper contai ers. The bottom of the container is applied to the body thereof by another machine.

One object of the invention is to improve the construction of a machine for making frusto-conical tubes so that the paper blank can be fed to the machine, formed automati call into a tube, and delivered as a finished conical tube ready to receive the bottom section.

A further object of the invention is to provide means for holding the outer-end of the formed blank while the adhesive material sets, thus insuring a closed seam.

A still further obiect of the invention is 2 to provide means for trimming the ends of the tubes after thev have been formed and while they are on the mandrel.

The invention also relates to further details, which will be fully described hereinafter. 7

In the accompanying drawings Fig. 1 is a front elevation of my improved tube forming machine;

Fig. 2- is a rear elevation;

Fig. 3 is a plan view;

Fig. 4 is a longitudinal sectional view on the line 44, Fig. 3;

Fig. 5 is an enlarged sectional View on the line 5-5, Fig. 3;

Fig. 6 is an enlarged front elevation of the feed end of the machine;

Fig. 7 is an enlarged plan view of the feed .end of the machine with the feed table re moved to illustrate the pasting mechanism;

Fig. 8 is a transverse sectional view on the line 88, Fig. 7;

'Fig. 9 is an enlarged front elevation of part of the machine, illustrating the ejecting mechanism and the cutters;

Fig. 10 is a sectional plan view on the line 1010, Fig. 9

Fig. 11 is a transverse sectional view on the line 11-11, Fig. 9, illustrating the cutters for trimming the ends of the tubes;

Fig. 12 is a plan View of one of the mandrels;

Fig. 13 is a sectional elevation on the line 1318, Fig. 12;

Fig. 14 is a front elevation illustrating one of the mandrels and the clamping shoe;

Fig. 15 is a rear elevation of the mechanism shown in Fig. 14;

Fig. 16 is a sectional View of the mandrel on the line 16-16, Fig. 12;

Fig. 17 is a detached perspective view of one of the shoes;

Fig. 18 is a sectional view of the'suction the paper elevated clear of the pasting roller;

Fig. 26 is a view, similar to Fig. 25, showing the paper in contact with the pasting roller; and

Fig. 27 is a perspective view of the finished tube.

Referring, in the first instance, to Figs. 1 to 4, inclusive, the base of the machine 1 is supported by suitable legs 2. A shaft 3 is mounted in bearings 4, 4 on the base. On the shaft 3 is secured a carrier in the form of a turret 5, on which the mandrels 6 are mounted. Secured to the shaft 3 is a ratchet wheel 7. Loosely mounted on the shaft is an arm 8, which carries a pawl 9 that engages the teeth of the ratchet wheel and moves the turret intermittently to bring one mandrel afer another in position to receive the paper blank from the feed table 10. A lock lS provided between the base 1 and the turret 5 by which said turret is maintained rigidly in certain definite positions to permit the proper successive 0 our tions of the mandrels. The lock wil be more fully described hereinafter.

The main driving shaft-11 of the machine is mounted in hangers under the base 1, and has a pulley 12 by which it is driven. The shaft 11 is geared to an intermediate shaft by gears 14 and 15. On the intermediate shaft is a gear wheel 16, which meshes with a gear wheel 17 on a shaft 18.

The arm 8, which carries the pawl 9 that moves the turret, is 'reciprocated by the shaft 18, on which is a crank arm 19. This crank arm is connected to the pawl arm 8 by a rod 20, Figs. 2 and 3.

The gearing is so timed that the turret remains stationary while a paper blank is wrapped} around a mandrel, and while a finished tube .is being ejected from the machine. l

Each mandrel 6 is hollow, and is secured to a hollow spindle 22, which is mounted in a bearing 21. The periphery of each man- 'drel is tapered and a seriesof perforations extend from the inside of the mandrel to the outer tapered surface, as shown in Fig.

16. The inner end of each hollow spindle 22 terminates in a flat end 22 so as to fit against the end 38 of a suction head 23 that is located in a fixed position at the the driving wheels 26, 27 and 28, Fig. 4. By

this construction, the mandrels are driven only at the point where the paper blank is wrapped thereon, at the point where the cutters trim the tube, and at the point where i the tube is ejected from the machine.

The suction head 23 is connected to the rotary suction pump 29 through a pipe 30,

Figs. 3 and 4. This pump has an exhaust pipe 31. On the shaft 32 of the pump is a sprocket wheel 33; around which passes a chain 34, from a sprocket wheel 35 on the main shaft 11. The suction head is made as shown in Fig. 18. In the cylindrical shell 36 of the suction head isa hollow piston 37, which has a'ring 38 of rubber, or other suitable flexible material to close against the end 22 of the spindle of each mandrel 6.

In the hollow piston 37 is an air port 39, which is normally held out of alignment with the suction pipe 30 by a wedge-shaped end 41' of a rod 42 (Figs. 18' and 19), which is located between the end of the suction head and a plate 43. The plate is attached to the rear end of the piston 37, and is slotted, as shown in Fig. 5, to receive a pin 44 on the support for the suction head. This pin prevents the piston turning in the suction head.

Attached to the plate 43 are springs 40, which extend. on each side of the suction head and are secured thereto, as illustrated in the drawings, so that, when the wedge is withdrawn, the springs 40 force 'the piston against the end of the spindle of a mandrel and also bring the port 39 in alignment with the suction pipe 30 so that, when a aper blank is fed to a mandrel, its inner e ge is held to the mandrel by suction. When the wedge is moved, it withdraws the piston from the spindle atthe same time the pos is moved away from the suction pipe 30.

The rod 42 is connected to one arm of a lever 45, which is pivoted to the base at 46. The other arm of the lever 45 is connected by a rod 47 to a. crank arm 48 on a shaft 49. The shaft 49 has a. gear wheel 59, which meshes with a gear wheel 17, Fig. 5. On the shaft 49 is av cam 51, which engages a roller 52 on a bar 53 that is pivotally connected to the lower end of a positioning rack 54, Fig. 5. The rack is pivoted at 55 to the base of the machine, and is normally held out of the path of the gear wheels 56 on the spindles 22 of the mandrels. On each gear wheel 56 is a blank section 57, Fig. 13, which engages the rack 54 and slides thereon, after the gear wheel has been turned, so as tohold the perforations in the mandrel in such a position with respect to the paper blank feeding machine that the edge of the paper blank extends over the perforations and is held to the mandrel by suction, while the blank is being wrapped upon the mandrel to 'form a paper tube.

The driving friction wheel 26 for driving the mandrels is shaped as shown in Fig. 7 to enter the groove in the friction wheels 25 of a mandrel as one mandrel after another is moved into position to receive a paper blank. The wheel 26 is mounted on a shaft 60, which is carried by one arm of a lever 61 that is pivoted at 62, Fig. 5. The other arm of the lever 61 has a roller 62, which bears upon a cam 63 on the shaft 18. A. spring 64 on a screw-threaded stud 65, carried by a post 66, holds the roller yieldingly against the cam and tends to hold the wheel .26 in frictional contact with the wheels 25 of the spindles asthey come into position.

Under the table 10 is a paste reservoir 67. A paste roller 68. Figs. 7 and 8, is mounted on a shaft 69 adapted to bearings 90 and 90*. The lower-portion of this paste roller is in the reservoir 67. The upper surface of the paste roller is below the surface of the table 10 and also below the movableing paste until slightl more than one IBVO? lutionis made when t e table 70 is lowered and with it a presser bar 71, which presses drel the paper onto the paste roller so that the paper receives a definite amount of paste. The bar 71 holds the paper onto the paste roller until the predetermined extent of surface is supplied with paste, when the bar 71 and the table are raised.

The paper is fed over the paste roller 68, movable table 70, .and onto the-mandrel, which has been brought in position to receive the paper, until it strikes a-small roller 72 at the mandrel and the edge of the paper is over'lhe suction holes in the man- At this point, the suction device is connected to the mandrel, drawing the edge of the paper onto the mandrel. .Whcn the mandrel is rotated, the paper passes under the roller and under the shoe, which holds the seam until the paste sets. r

The paper is prevented from rolling as it is fed to the mandrel by curved guards 73. The paste roller hasan adjustable scraper blade 74. Carried by this blade are end blades 75 and 7 6 for scrapin paste from the ends of the paste roll, there y insuring the proper amount of fresh paste being trans ferred to the paper.

In the reservoir 67 in front of the paste roller is a flat paddle 77, which has trunnions that are mounted in suitablebearings.

The paddle is geared to a shaft 78 extending through the side of the reservoir, Fig. 7. The shaft is supported by an elongated bearing 79. The paddle keeps the paste inproper condition.

On the end of the shaft 78 is a pulley 80, around which passes a belt 81 from a pulley on a shaft 11, Fig. 6. The presser bar a 71 is carried by a frame 82, which is pivoted to an arm 84 that is secured to a shaft 85, mounted in a bearing 86, Fig. 7 A guide rod 88 extends from the frame 82 and slides against an upright guide 89 on the outer bearing 90 for the paste roller.

The table 7 0 is secured to a rod 91, which is mounted in an adjustable block 92 that carries the presser bar 71 so that the table 70 and the pjesser bar 71 are raised and lowered in unison.

On the shaft is an arm 93, which is connected by a, rod 94 to an. arm 95 on .a

shaft 96, which extends under the paste reservoir and has, at its outer end, an arm 97 that carries a roller, which is in contact with a cam 98 on the shaft 18-, Fig. 6.

The cam 98 is so set that the table 70 .and

the presser bar 71 are raised and lowered in. time with the mandrel and its mechanism. The shaft 69 of the paste roller is preferably mounted in ball hearings in the bearings and .90", Fig. 8, and' has a knurled knob '99 by which it can be turned. by an operator, when necessary. When the machine is in operation, the paste roller is turned by the forward movement of the paadjustable so that the curved paper blanks are fed to the mandrel at the proper angle. A post 103 projects from the base at one side of the paste reservoir, Fig. 3. A bracket 104, secured to the underside of the table 10 is adjustably attached to the post by a bolt. The outer edge of the table is mounted on a slotted bracket 105, which has a slotted foot, as shown in Figs. 1 and 3 A clamp screw passes through the table and another clamp screw passes through the slot in the foot of the bracket and into the base 1.

Each mandrel is turned to a given position by the pinion 56 engaging the pivoted rack 54 as it comes to the point opposite the table to receive a sheet and is held in this position by means of a flat portion on the pinion travelin over the face of the gears. \Vhen the man rel is in the given position,

the perforations in the mandrel are at one side of the verticalcenter line, as shown in the diagram, Fig. 25. As the paper is applied, the mandrel is turned' by the friction wheel 26. The paper passes under the roller 72 and under a shoe 106, Fig; 14, and, when the blank is wound on the mandrel, the two ends of the blank are between the shoe and the mandrel, the shoe holding the edge until the paste has set.

The shoe 106 and the roller 72 are carried the head until the paper tube is removed from the mandrel. leased.

A spring 113 on a stud 114, pro ecting from the turret, returns the head to its normal position. The spring 113 rests upon a plate 115, which extends over the arm 111. This plate has a foot, which is secured the turret, Figsrl i and 15.

The head is then re- The shoe 106, associated with the mandrels,

is .mounted on a shaft 116 that is located in the head 107. On the shaft 116 is an arm 117 to which is attached one end of a. coiled spring 118. The other end of the spring is secured to a pin on the head, Fig. 14. A sto pin 119 limits the movement of the arm 11 1n onedirection.

By this'construction the shoe -is held against a mandrel bythe tension of the spring 118, and yields as the plies of paper are wound around a mandrel.

The roller 72 of each head 107 is mounted on a pin that isecuredto the head. Each head is preferably ribbed, as shownin Fig. To insure a mandrel stopping at the proper point in respect to its shoe, a rack 120 is so located above the point at which the paper is wrapped upon a mandrel that the pinion 121 on each mandrel engages the rack and is turned by it until the flat portion 122 on the pinion comes in contact with the face of the rack, as shown in Fig. 2, holding the mandrel in such position in respect to its shoe that the seam of the paperis under the shoe. The shoe and the mandrelretain this position until the paste sets and until the shoe is moved away to allow the formed tube to be cut and removed from the mandrel.

The rack 120 is pivoted at 123 at its lower end to the base of the machine- The upper end of the rack is connected. to the bearing 4 by a rod 124, which extends through an opening in a plate 125, secured to the bearing 4. On the rod is a head 126, which limits the outward movement of the rack. A spring 127 in the head is located between the plate 125 on the bearing and a collar 128 on the rod. This spring allows the rack to yield, should the parts become clogged. i

The mandrels and shoe retain the same relation during three-fourths of the revolution of the turret, at. which time the head carrying the shoe is moved away from the mandrel by the cam 112. After the shoe has been moved away from a mandrel, the mandrel, with the paper tube thereon, passes to a position in line with the cutters 129, which trim both ends of a paper tube, as shown in Fig. 11. The outer ring out from the tube falls off and away from the machine, while the inner ring is retained in the bearing of the man- 'drel and is removed therefrom by a suitable cutting device, described hereinafter.

The cutters 129 are mounted on a shaft 130, having its hearings in one arm of a lever 131, pivoted at 132 to a bracket 133, depending from the base 1. On the other arm of the lever 131 is a roller'134, which is in contact with a cam 135 on the shaft 49. A spring 136 holds the roller 134 in contact with the cam 135.

The mandrels are rotated when the cutters are moved into cutting position. The fric.

tion wheel 25 of each mandrel is moved into frictional contact with a friction wheel 27, Fig- 11, as the turret is rotated intermittently. The friction wheel 27 is mounted on a driven shaft 136 having asprocket wheel 137, around which passes a drive chain 138 from a sprocket wheel 139 on a shaft 140. The chain also passes around an idler 141, Fig. 2.

The sprocket wheel 146 is on a line with the pivot 82 of the lever .61, which carries the friction wheel 26 and drives the wheel through gearing 148 and 149.

To insure. the paper tube turning with the mandrel during the cutting operation, a spring-pressed roller 157 is set so as to press upon the paper tube and to turn withthe tube and the mandrels.

The roller 157 is mounted in a head 158, which is carried by a stem 159 that passes through a long bearing 160. A coiled spring 161 is mounted between the head and the bearing, as shown in Fig. 9, and presses the roller against the tube on the mandrel when a mandrel is in position. A collar 162 limits the outward movement of the head 158 and its roller. In the present instance, the hearing is mounted on a standard 163- After the ends of the paper tube have been trimmed by the cutters, the turret is moved to bring a mandrel, carrying a cut tube, into position to allow the ejector to force the tube from the mandrel. This ejector consists of a rubber-faced roller 150, which is set at an angle in respect to the mandrel and so driven as to cause the tube to move off of the mandrel, due to the frictional contact of the ejector.

The rubber-faced roller 150 is mounted in bearings on a frame 151. This frame is arranged at an angle in'respect toa mandrel, as shown in Fig. 9. The frame 151 is pivoted to one arm of a lever 152, mounted loosely on the shaft 140.- The other arm of the lever carries an adjustable bar 153, which is secured to the lever by a bolt 153 that extends through a slot in the bar 153. This bar has a roller 154, which is held yieldingly against a cam 155 on the shaft 49 by a spring 156. A spring 151* is attached to one end of Elie frame 151 and to a pin on the pivot 132,

ig. 9. i

The friction wheel 28 is so located as to come into frictional contact with the wheel 25 of a mandrel when it is moved into alignment with the ejecting means. At this time,

the cam 155 is so set as to release the lever and allow the spring 156 to force the ejecting roller 150 in contact with the tube, causing the tube to be withdrawn from the mandrel as the mandrel is rotating, which movement also rotates the ejecting roller. Each mandrel, after a tube has been removed, is moved into position to receive another paper blank.

In order to remove the ring that is cut from the paper tube, a slitting device is provided, which has a knife so operated as to engage the loose ring as it stops momentarily at the device cutting the ring to allow-it to fall clear of the machine. A rake is rovided, which engages a cut ring and ai s in removing the ring from the machine. Two or three rings may accumulate on the bearings of the mandrels without interfering with the operation of the machine.

Referring to Figs. 22, 23 and 24, a bar 164 is mounted in a bracket 165. Adjustably mounted on this bar is a plate 166 having bearings 167 for a stud 168, on which is an arm 169 and a bevel wheel 170, which meshes with a inion 171 on a knife shaft 172. The knife b ade 173 is made as shown in Fig. 23, and has a recess 174, which forms a hook 175. The. edges of the recess and the hook are sharp so that, as the knife is rotated, the hook engages a ring out from a tube and severs it. In some instances, the knife also removes the ring, but to insure the positive removal of acut ring, a rake 176 is located in its path, the teeth of the rake engaging the ring and draggingit from the mandrel.

The teeth of the rake are preferably'made as shown in Figs. 23 and 24. The tooth portion' 177 of the rake is held at the rear of the said cutting device and has an arm 178, which is attached to the late 166.

The arm 169 as a roller 179, which is in the, path of the mandrels as they move past a the cutting device. The arm is moved forward by the mandrels turning the cutting blade from the position shown in full lines in Fi .23 to that shown by dotted lines in gure. A spring 180 retains the arm 169 in position as soon as it is released by a mandr The lock between the turret 5 and the frame 1 comprises a bolt 200, slidabl mounted in a bearmg 201, secured to the ame, as illustrated in Figs. 3 and 5. One end of said bolt is adapted to enter one of a series of notches202 in one side of the turret 5. The opposite end of the bolt 200 is provided with an angularl depressed groove 203, which has an angu ar side wall'20-t that is adapted to be engaged by a roller 205, which earriedb'y one end of a bar 206, slidably mounted in bearings 207, secured to thebase 1.

The opposite end of the bar 206 is provided with a cam roller 208, which is adapted to be engagedby a cam 209 that is secured to the shaft 18. A collar 210 is secured to the bar-206, adjacent one of the bearings '207,

and a spring 211 is ositioned between said collar and said bear ng for the purpose of maintaining operative engagement between the roller 208 and thecam 209. A s ring 212, having one end secured to the b0 t200 and its opposite end secured to the bearing 201, tends to move the said bolt inwardly and maintains thebolt in one of the grooves 202. As the shaft 18 is rotated, the cam 209 moves the bar 206 longitudinally, the roller 205 thereon engaging. the wall-204 of the bolt 200, thereby withdrawing'said bolt from the groove 202. As the cam 209 continues to rotate, the bar 206 recedes, and thereby releases the bolt 200 and permits the same to be moved inwardly by a spring 212 against the side of the moving turret 5. When the turret 5 completes its movement, the bolt 200 enters the aligned notch 202 therein, and locks the turret in a definite position.

-The operation of the machine is as follows The paper blanks are cut to the form desired and are placed on the feed table.- The blanks are fed to the machine by hand. A blank is moved over the paste roller, but not in contact therewith, as it is held clear thereof by the elevated table 70. The edge of the paper is moved over the suction holes in a mandrel, This movement is stopped by the roller at the mandrel. The suction valve is 1gpened, 'which causes the end of a paper turned, and when the paper is drawn over the paste roller to an extent equal to a little more than one revolution of the mandrel, the table is lowered and with it the blade 71, which forces the aper in contact with, the paste roller, applying paste to the balance of the aper with the exception of a narrow portion at the end of the blank, which is coated with the excess paste as the pa er blank is wrapped around a mandrel. ily

this method, the escape of paste at either end of a blank 1s avoide -When a blank has been wrapped aroun a mandrel, the suction device is withdrawn ank to adhere to a mandrel, which is then 1 and the turret carrying the mandrels is moved intermittently to bring another mandrel in position. The mandrel with the -paper wrapped thereon, is rotated until the seams of the formed paper tube are under the shoe. The parts are. held in this positionuntil the paste sets. The turret is moved intermittently, bringing one mandrel after another in position to receive a paper blank. When the turret has turned threequarters of a revolution, the paste has set and the shoe can bewithdrawn. The ends 1 I v of the paper tube are trimmed and the mandrel is moved to the next position, where the low and having a series of longitudinal perforations; suctipn means arranged to communicate with each mandrel at the winding point; inde ndent means for rotatin each mandrel prior to its reaching the winding

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