US1831201A

US1831201A - Slitter and rewinder

Info

Publication number: US1831201A
Application number: US411234A
Authority: US
Inventors: Sieg Karl
Original assignee: Samuel M Langston Co
Current assignee: Samuel M Langston Co
Priority date: 1929-12-03
Filing date: 1929-12-03
Publication date: 1931-11-10
Anticipated expiration: 1948-11-10

Description

Noy. 10, 1931. K. sil-:G j 1,831,201

sLITTEn AND fmswmmimv i Filed Dec. s. 1929' 2 smeris-sneer ATTORNEYJ` Nov. l0, 1931.

K. slEG 1,831,201

SLITTER AND REWINDER Filed'Dec. 3. 1929 2 Sheets-Sheet 2 ATTORNEY.

A-qas' Patented Nov. ,10, 1931 y UNITED STATES PATENT oFFlcE KARL SIEG, 0F BROOXLAWN, NEW JERSEY', .ASSIGNOB T0 SAIUEL I. I'ANGSTQN CO., 0F

' CAHDEN, NEW JERSEY, A. CORPORATION 0F NEW JERSEY suman um nEwINDEn v Application med December s, 1929. serial No. 411,234.

My present invention is an improvement in web wlnding machines of the three roller or drum type, in which the roll of material being wound is supported uponV a pair of driven drums and pressed down by a su rposed drum or roller which is also prefera ly positively driven.

The invention is more especially concerned with means for raising and lowering the pressure roller at times when the roll of paper is to be removed or a new rewinding reel or core inserted.

An object of the invention is to provide y power driven means for raising and lowering the pressure roller whereby the manual labor re uired is reduced to a minimum. A further ob] ect is to permit lowering of the roller without danger of sudden gravity descent of the roller which might injure the operator or the machine or which might tend to force the roller too far unless carefully watched.

Another ob]l ect is to provide a roller operating mechanism entirely fool-proof in action in that, if the operator inadvertently fails to cut oif the power when the roller has reached the desired raised position, continued running of the motor cannot injure the mechanism, move the parts too far, or cause any damage.

Another object is to provide a power operated controlling and actuating means which roller to any desired extent to the end that the resistance of the roller to upward movement may be caused to exceed its weight.

Another object is to accomplish the foregoing results with an operating mechanism of simple design, of low cost and of rugged construction. v

I have illustrated my invention as applied to a type of machine, the pressure roller of which is journaled in the ends of a pair of preferred construction the motor shaft is coupled through a train of speed reducing gearing to a sector plate on the said rock shaft. As one feature the sector is of such arcuate length that it passes out of engagement with the normally meshing gear when the pressure roller reaches its uppermost position and thus prevents further lifting of the roller. Interposed in the gear train is a worm and screw which preventsthe'heavy pressure roll from descending by gravity and driving back through the train to reverse the motor or, in other words, which serves as an escapement for the gear train (which is loaded by the pressure roller) when the motor is running 1n reverse. Also interposed in the train is a ratchet and pawl mechanism which serves as an overrunning clutch to permit stopping of the pressure roller if the motor continues to run 1n reverse after the pressure roller has reached its lowermost position. The also permit the pressure roller to be slow y elevated by the expanding rewound paper roll without disturbing other parts of the operating gear train.

Rotary motion of one gear of the train is preferably frictionally opposed, whereby to load the pressure roller on its upward movement and retard or cushion its downward movement.

The invention may be more fully understood from the following description in connection with the accompanying drawings wherein:

Fig. 1 is a somewhat diagrammatic verticall sectional view through a slitting and rewinding machine embodying the lnvention; l

Fig. 2 is an end view of a portion of the machine, showing in elevation the driving and controlling mechanism for the pressure roller; and

Fig. 3 is a top plan view of the parts shown v ends of the arms 14 travel in vertical guideways 18 in the frame so that as the rock shaft 17 is oscillated, the movement of the pressure roller 13 is vertical. The pressure roller is preferably positively driven at a slightly higher surface speed than the drums 11 as is common in the art. The mandrel is not driven and the winding is done by the action oflhe drums 11 and 13 in rotating the paper ro The paper passing from the roll A is trained under a guide roll 19, over a tensioning roll 20, under another guide roll 21 and thence drawn between a battery of slitters 22-22, passed over the'lirst drum 11, and wound on the roll B.

The machine, as thus far described, is merely one type to which my invention may be applied and is not in itself hereinafter claimed. It serves to unwind the paper from the roll A, trim or slit it longitudinally to .the desired width or widths, and' rewind it.

My present invention is more especially concerned with the meansI for raising and lowering the pressure roller 13 when it becomes necessaryv to remove a rewound roll or to begin windin a new roll. One form of my novel operating mechanism is shown in F1 s. 2 and 3.

e specific form illustrated includes a reversible electric motor 23, mounted upon a suitable platform or table- 24 at one end of the machine and havin its driving shaft coupled by a universal jomt 25 to an aligned worm shaft 26 mounted in a transmission casing 27, and meshing with a worm wheel or pinion 28 fixed upon a shaft 29 extending at right angles to the worm 26 and in parallelism with the rock shaft 17. This worm and pinion constitute a reduction gearing which is reversible in the sense that the direction of rotation of the worm can be reversed but is irreversible in the sense that the pinion cannot drive the worm. A pinion 30 on the shaft 29 drives a sprocket wheel 31 on a parallel countershaft 32 through the intermediacy of a sprocket chain 33. The sprocket wheel 31 is much larger than the pinion 30 so as to give a further speed reduction. Sprocket wheel 31 carries a dog or pawl 34 coacting with a ratchet wheel 35 fixed to or integral with a sleeve or collar 36 rotatable upon the countershaft 32. Fixed upon or integral with this sleeve is a pinion 37 in mesh with the teeth 38 of a sector plate or gear segment 39 which is fixed upon the rock shaft 17.

In operation, assume that the pressure roller is in the position of Fig. 1 and that the roll of rewound paper has reached the desired diameter. In order to remove this paper from between the three winding drums it is necessary to elevate the upper drum or pressure roller. To accomplish this, the motor 23 is started and acts through the reducing gear train, above described, to actuate the sector plate 39 thereby turning the rock shaft 17, lifting the arms 16 and with them lthe roller 13. lVhile the motor is running in a direction to elevate the pressure roller the drive is through the ratchet and pawl 34:-35, that is to say, the pawl on the sprocket wheel positively drives the ratchet wheel during rotation of the sprocket 31 in a clockwise direction and movement of the gear segment in a counterc-lockwise direction. If due to the negligence of the operator, he omits to cut off the motor 23, no harm can be done, because the gear segment 39 is so proportioned and positioned in respect to the other parts that as the pinion 37 reaches the last tooth of the segment, the segment and pinion will unmesh and the further or continued rotation of the pinion will not cause any further movement of the segment or any further upward move-v ment of the pressure roller.

When the motor is stopped the pressure roller tends to descend by its own weight. Such gravity descent of the roller is effectively blocked by the action of the irreversible worm and pinion reduction gear 26-27 in a driving gear train. Thus the pressure roller is held in elevated position until such time as the worm itself is positively rotated in the opposite direction.

After the roll is removed a new mandrel is placed on the drums 11-11 and the pa er trained around it. It then becomes desira le to lower the pressure roller 'onto the new but very small roll. To accomplish this the motor is reversed, reversing the direction of rotation of the worm and permitting the weight of the, roller itself to reversely drive the gear train as rapidly as the worm 26 will permit. During this o eration the weight of the roller acts through the sector 38, pinion 37, sleeve 36, ratchet wheel 35, and pawl 34 to reversely drive the sprocket 31. Here again, if the motor is not cut oif no harm can occur since, when the pressure roller reaches its lowermost position in contact with the paper or even the operators fingers on the paper, there will be no further tendency for the pressure roll itself to drive the gear train and consequently the motor actuated, reverse drive of the sprocket wheel 31 will simply cause the pawl to overrun its ratchet.

This slowl descent of the pressure roller is important not only in that it eliminates sudden shocks and jars on the machine proper, but it prevents an operator from having his fingers injured by the pressure roller dropping upon them as he is smoothing the paper on the mandrel. In fact the pressure roller may slowly and gently descend on the ingers of the operator without an other eiect thantransmitting the weight o the pressure roller to the operators hand. This weight, in itself, is not'suicient to cause injury.

As the new roll is rewound on the new reel and its diameter increases, the ressure roller will be elevated b the building up of the paper on the reel. his elevation of the ressure roller is unaccompanied by any driving of the operating gear train, since, as the roller rises and the sector plate 39 correspondingly swin s in a'countercloc-kwise direction as viewe in Fig. 2, the ratchet wheel willloverrun its dog and no motion will be im arted by the s rocket wheel 31.`

s best seen in ig. 3 the drivin r and controlling means for the ressure rol er has associated therewith a rake mechanism by which the resistance to the pressure roll to the upward thrust of the paper roll may be increased to any desired extent. In my im: proved construction the brake mechanism does not eiect the lowering or raising of the roller by the motor. It merely resists the pushing of the roller upwardly when the motor is at rest.

sleeve 44 and normally urged into frictional engagement with the disc-41 by a coiled expansion spring 47 encircling the sleeve 44 and reacting against a nut 48 mounted on the threaded end of the sleeve 44. This nut 'ma be provided with a ring handle 49 and a justed along the sleeve 1n order to properly tension the spring 47 and thereby predetermine the friction between the cooperating clutch discs. Inasmuch as one of the discs 41 is ixed to turn with the pinion 37 and another of the discs 42 is keyed to the shaft 32 and through it to the irreversible gearing and the motor, the load on the pressure roller may be variedby varying the pressure exerted by the spring 37 in forcing the discs together. Thus the resistance to its upward movement of the pressure roll under the iniluence of the expanding rewound paper web may be varied at will. The clutch may be released to facilitate lowering of the pressure,

if that be necessary.

Various changes may be made in the construction illustrated and various mechanical equivalent parts may be employed in place of those shown. Merely as examples, a gear train might be used in place of the sprockets i, and cham; some source of power other than a pinion to lock the roller at any elevation to ich it may be raised by the motor, said motor being reversible to permit descent of the roller by its own weight at a speed determined by the speed of the rotation of the worm, and a ratchet and pawl in the'train forming part of the `drive as the roller is elevated, and serving as an overrunning clutch when the roller reaches its lowermost position with the motor running in reverse direction.

2. A winding machine including a support for a roll of material being wound, a pressure roller on the top of the material, a movable frame carrying the pressure roller, a motor, and a speed reducing gear train connecting the motor to the frame, and including a Worm and a pinion to lock the roller at any elevation to which it may be raised by the motor, said motor bein reversible to permit descent of the roller by its own weight at a speed determined by the s eed of the rotation of the worm, and a ratc et and pawl in the train forming part of the drive as the roller is elevated and serving as an overrunning clutch when the roller reaches its lowermost position during lowering of the roller with the motor running, and said ratchet and pawl also permitting elevation of the pressure roller under the influence of the expanding roll when the motor is at rest.

3. A winding machine including a support for a roll of material being wound, a pressure roller engaging the roll and having movable bearing permitting bodily movement of the roller and building .up of the roll, a motor, and a speed reducing gear train connecting the motor to said bearings and including a worm driven by a motor, a worm wheel in mesh with the worm, a countershaft, driving connections between said Worm wheel and said countershaft, a toothed sector connected to said bearings, a sleeve turning on'the coun! tershaft, a pinion on the sleeve meshing with the sector, a ratchet wheel fixed to the sleeve, and a dog driving the ratchet from said driving connections. l

4. A three drum slitter and rewinder including a vertically movable pressure drum adapted to rest on the material being wound, a pivoted arm carrying said drum, reversible motor means operatively connecting the arm and motorto permit positive elevation of the drum by the motor and permit gravitational descent of the drum at a speed controlled by the motor, and means whereby the motor runs idly after the drum has reached its uppermost cr lowermost position.

5. Winding mechanism having a pressure ioller adapted to en age with the material during the windin t ereof, motor operated means for lifting e pressure roller oil the material, and for lowering the roller, and a brake mechanism ermitting free movement of the roller by tlie motor operated means, but resisting upward movement of the roller by action of increase in diameter of the roll of material.

6. A'winding machine including a support for a roll of material to be wound, a pressure roller adapted to rest on the top of the roll being wound, a movable frame carrying said roller, a motor, a speed reducing gear train connecting the motor to the frame for raising the roller and for controlling the gravity descent of said roller, and means for automatically disengaging the operative connection between said motor and said frame when said roller has been lowered to a predetermined position.

7. A winding machine including a support for a roll of material to be wound, a pressure roller adapted to rest on the top of the roll, a movable frame carrying the pressure roller, a motor, a speed reducing gearing connecting the motor to the frame and including an overrunning clutch forming part of the drive between said motor and said roller during raising of the roller by said motor, and permitting the motor to continue running after the roller has been lowered into engagement with said roll.

8. A winding machine including a support for a roll of material to be wound, a pressure roller adapted to engage the top of the roll, a movable frame carrying the pressure roller, a motor, and speed reducing gearing connecting the motor to the frame, and including means for permitting the gravitational descent of the roller at a speed controlled by the motor, andan overrunning clutch forming part of the drive between the motor and the frame and permitting the roller to stop in its lowermost position while the motor is running.

9. A winding machine including a support for a roll of material to be wound, a pressure roller adapted to engage the top of the roll, a movable frame carrying the pressure roller, a motor, and speed reducing gearing connecting the motor to the frame and including a worm and pinion to lock the roller at any elevation to which it may be raised by the motor, said motor being reversible to permit descent of the roller by its own weight at a speed determined by the speed of the rotation of the worm, and an overrunning clutch forming part of the drive between said motor and said frame, and permitting the roller to stop in its lowermost position while theA pressure roller adapted to engage the top of the roll, a movable frame carrying said pressure roller, and'gearing and an overrunning clutch in series connecting the motor to the frame, for raisin the frame and for control- 11n the gravitational descent thereof by rotation of the motor, and rmitting the upward movement of the ro er and frame due to increase in size thereof and while said motor is at rest.

11. A winding machine including a support for a roll of material to be wound, a pressure roller adapted to engage the top of the roll, a movable frame carrying the pressure roller, a motor, gearing connectin the motor to the frame, an overrunnin c utch forming part of the drive between said roller and the motor, and permitting the roller to stop in its lowermost position while the motor is running, and also permitting u ward` movement of said roller under the in uence of the expanding roll of, material'when the motor is at rest, and adjustable means connected to one element of said overrunning clutch to yieldingly resist said upward movement.

Signed at Camden, in the county of Cainden and State of New Jersey this 27th day of November, A. D. 1929.

KARL SIEG.