US1353634A - Process of and machine for winding rolls of paper towels and toilet-paper, &c. - Google Patents

Description

W. S. CRANDELL.

PROCESS OF AND MACHINE FOR WINDING ROLLS OF PAPER IDWELS AND TOILET PAPER, &c. I APPLICATION FILED DEC. 16, 1918.

1,353,634. Patented-Sept. 21, 19201 5 SHEETS-SHLET lw s. CRANDELL. PROCESS OF AND MACHINE FOR WINDING ROLLS OF PAPER TOWELS AND TOILET PAPER, &c.

\ APPLICATION FILED DEC. 16, I918. 1,353,634. I

5 swans-earn 2.

Patented Sept. 21,1920.

A v w. s. CRANDELL. PROCESS OF AND MACHINE FOR WINDING ROLLS OF PAPER TOWELS AND TOILET PAPER, 8L0.

APPLICATION FILED DEC- l6, l9l8. 1,358,634.

5 SHEETSSHEET 3.

Patented Sept. 21, 1920.

w. s. CRANDELL.

PROCESS OF AND MACHINE FOR WINDING ROLLS OF PAPER TOWELS AND TOILET PAPER, &c.'

Patented Sept. 21,1920.

5 SHEETS-SHEET 4.

APPLICATION FILED DEC. I6, 1918.

, W. S. CRANDELL. PROCESS OF AND MACHINE FOR WINDING ROLLS OF PAPER TOWELS AND TOILET PA PER, aw. Patented Sept. 21, 1920.

' APPLICATION FILED DEC. 16, 1918.

5 SHEETS-SHEET 5- S AL MW Q E m S a 3 R 9 mm ma & u 1 a k \w UNITED STATS PATENT omcs.

WILLIS S. CRANDELL, OF ELSMERE, NEW YORK, ASSIGNOR TO ALBANY PERFORATED WRAPPING PAPER COMPANY, OF ALBANY, NEW YORK, A CORPORATION OF NEW YORK.

PROCESS OF AND MACHINE FOR WINDING ROLLS OF PAPER TOWELS AND TOILET-PAPER, 8w.

Application filed December 16, 1918. Serial No. 266,862.

To all whomit may concern:

Be it known that I, WILLIS S. CRANDELL, of Elsmere', in the county of Albany and-in the State of New York, have invented a certain new and useful Improvement in Processes of and Machines for Winding Rolls of Paper Towels and Toilet-Paper, &c., and do hereby declare that the following is a full, clear, and exact description thereof.

The object of my invention has been to provide a process of and-machine for winding rolls of paper towels and toilet paper, etc., which shall have the advantages, among others, of making relatively small and tight rolls; of avoiding to .a considerable extent and reducing the breakage of the web of paper from which said rolls are formed as compared with machines in general use at present; of supporting the web of paper substantially throughout its course through the machine and of providing a machine which is simple and readily operated and adjusted, and to such ends my invention consists in the process of and machine for winding rolls of paper, hereinafter specified. My invention, both as to the process aspect of it and the machine aspect of it, is capable of embodiment in many different forms. While, therefore, I shall illustrate my invention by the best embodiment known to me, such embodiment is to be regarded only as typical of many possible embodiments, and my invention is not to be confined thereto.

In the manufactureof rolls of paper towels and toilet paper, it is customary to wind the roll of paper coming from the paperforming machine into a large roll called a jumbo roll, from which rolls that are usually both smaller in diameter and narrower in width are to be formed, to make rolls of towels or of toilet paper. My invention relates to a machine for making the latter type of rolls.

55 of Fig. 1;

Fig. 6 is a vertical cross section along the line 66. of Fig. 1;

Fig. 7 is a detail vertical section along the line 7-7 of Fig. 6;

Fig. 8 is a broken horizontal section in the axial plane of the roller and Fig. 9 is a detail view of the roll upon which the paper is wound. 1

My process and the principal operative parts of my machine will first be explained in outline (by reference to Fig. 1), after which the explanation in detail will be more easily understood. In the said figure, the web 1 is shown as led from a jumbo roll 2, (having an axle 3), preferably over apinch roll 4 to the surface of a drum 5, around the periphery of which the web travels, the web being wound upon are-winding shaft 6 to form a re-winding roll 7 of towels or toilet paper. In its passage around the drum 5 the web is preferably cut transversely, (but not completely severed) by serrating knives 8 carried by a serrating roll 9,which knives are received in grooves 10 in the drum 5. A second pinch roll 11 is preferably provided on the opposite side of the drum 5 from-the pinch roll 4, said rolls serving to hold the web against the surface of the drum and the first pinch roll also serving to support the web in its passage from the jumbo roll to the Winding drum. The paper wound upon the re-winding shaft 6 is severed longitudinally by annular knives or cutter disks 12 carried by a slitting roll 13. The slitting roll is driven at a faster surface speed than the winding drum and therefore tends to roll the paper tightly upon the re-windingv shaft, and thus tends to make a relatively small, compact roll of a given length of paper web.

Taking up now, the detailed description of the machine, and the process practised thereby In the said machine there are side-frames 14 on which are mounted the bearings of the various rolls before-mentioned. The axle of the jumbo roll is laid in open bearings 15 formed oncarriages 16, each of which is supported by a pair of rollers 17 on a way 18. Each way is pivoted, preferably at its rearward end, on a fulcrum 19 mounted on one of the side-frames so that the forward end of the way can be raised to cause the carriage to tend to roll toward the winding- Patented Sept. 21, 1920.

drum. Each way is preferably provided with an arm or other projection (which in the present instance is in the form of a sector 20) which, by an adjust-able connection with the side-frame, can be made to support the way at any desired inclination. In thepresent instance I have shown the said sector as provided with a curved slot 21 through which passes a bolt 22 that is fastened in the side-frame. A threaded rod 23 is secured on said bolt by an eye 23 the said rod itself passing through a hole in an car 24 formed on the said segment, and a hand-nut 25 being threaded upon the said rod and support ing the said ear thereon. By turning the hand-nut, the ear, and with it the segment and ways, can be raised or lowered. In the present instance, each carriage is provided with ribs or flanges 16 which project into grooves formed in the ways, and thus the carriages are prevented from rising off the ways.

As a further means for causing the jumbo roll to tend to move toward the winding roll, a chain or other form of flexible connection 26 is attached to each carriage and is passed rearward (toward the windingdrum) and around a guide-pulley 27, and thence forward and around another guidepulley 28 from which the chain hangs vertically, and supports a weight. By using a proper inclination of the ways or a suitable weight 29, or both, the jumbo roll can be forced toward the drum so that it will always be in contact either with the pinch roll 4 or with the drum, if, as might be done, the pinch roll were omitted. As the diameter of the jumbo roll decreases, its axle is moved forward so that its periphery is always in contact with the pinch roll or the winding-drum. This arrangement always affords uninterrupted support for the web in its travel from the jumbo roll to the winding-drum and thus eliminates a frequent cause of breakage of the web. The winding-drum 5 is mounted in stationary bearings in the side-frames, and in the illustrated embodiment of my invention it carries a driving pulley 30 by which the en tire machine is driven. Pinch rolls 1 and 11 are each so mounted as to be movable toward and from the winding-drum to maintain a constant pressure against the winding-drum notwithstanding any possible variations in the periphery of the said drum or in the thickness of the web of paper to be wound, and the said pinch rolls are preferably yieldingly pressed against the winding-drum. In the present instance, the pinch rolls are journaled in the upper ends of arms 31 which are fulcrumed on pins 32 that are supported by the side-frames, and each arm is yieldingly pressed toward the winding-drum by a spring 33 mounted on a bolt 34 which passes through an opening in the said arm and through a flange or Web on the side-frame, a nut 34 on the said bolt resting against the said flange and serving to adjust the pressure of the spring against the arm. The serrating roll 9 is journaled in the side-frames below the drum 5 from which it is driven by gears 35 and 36 mount ed onthe axles of said rolls. The serrating roll is, in the present instance, shown as provided with three serrated knives 37 having saw-tooth edges, which knives enter the grooves 10 on the winding-drum and partly but not wholly sever the web of paper transversely. The pinch rolls, by holding the web tightly against the surface of the drum, and the slitting roll 13, by traveling at a faster surface speed than the winding-drum, hold the web tight across the grooves so that it resists the tendency of the serrating knives to push it into the grooves and causes a good cutting action to take place. The re-winding shaft 6 simply lies upon the surface, preferably the upper surface of the drum, and preferably by having spring journals in its ends extending between and held in place by two vertical ribs or splines, so that it can rise as the roll of paper wound upon it increases in diameter, but it is preferably not driven by power applied to it. The spring journals recede into the end of the shaft when placed in the machine and pass through slots in the opposite spline whenremoved. The slitting roll 13 con sists of a shaft 13 upon which is threaded a series of rolls 13 having the annular knives or cutter disks 12 between them. I desire to drive the slitting roll so that its surface speed shall be greater than that of the winding-drum, and consequently so that its action will be to tend to wind the roll being formed upon the re-winding shaft tightly to make a relatively hard and small roll, and I also desire to permit the slitting roll to recede from the re-winding roll as the diameter of the roll being formed increases. For this purpose, I .mount. the slitting roll in bearings formed in a vertical, slidable gate or frame consisting in the present instance of bars 38 (in the lower ends of which the said shaft is journaled), which bars are mounted in vertical guides formed in uprights 39 on the side-frames, the said bars being connected by a brace 38 in order to drive the slitting roll. The shaft of the said roll is extended through a slot 39 formed in one of the uprights 39, and the extended end of the shaft is, in the present instance, shown as journaled in a bearing supported by a bracket 40, which extends from the gate or slide 38 around the upright into position to support the said bearing. The shaft 13 of the slitting roll is provided with a sprocket wheel 41, and in order to drive the said wheel and yet permit the latter to move vup and down with the gate, I have provided the following arrangement: A sprocket chain 42 passes around a driving sprocket 43, that is frictionally secured upon the shaft .5 of the winding drum, and

' around a guiding sprocket 44, journaled on a stud secured to the upright 39. The frictional drive for the sprocket gear 43 is in the resent instance shown as consistin of a hu 45 fixed on the said shaft and agalnst whichthe sprocket gear 43 rests, a preferably fiber disk 46 restlng against the opposite face of the sprocket gear, and a split nut 47 threaded on the shaft 5 and adapted to be secured in adjusted position by a screw 5 by which the split can be drawn together. Between the driving sprocket gear 43 and the guide pulley 44 the sprocket chain 42 passes over a sheave 47 mounted on a plate 48, which latter also carries a flange 49 that is adapted to bear against the side of the chain opposite the sprocket wheel 41 on the slitting roll shaft and to hold the chain so that the latter sprocket gear will always be in contact with it and be driven by it, no matter in what position toward or away from the winding-drum the slitting shaft may be. In order to keep the said adjustment and allow for wear, the plate 48 is adjustably mounted on the frame by being set against a vertical flange or plate 39 on the upright 39 to which flange the plate 48 is secured as by bolts 39 in one of said parts and passing through slots in the other of said parts.

By this construction, the driving sprocket gear 43, rotating with the shaft of the drum, tends to drive the slitting roll at a surface speed greater than that of the outermost layer of paper on the roll being formed, and the friction drive before described permits the gear 43 to yield so that, while the paper on the roll being formed is put under tension and is rolled tightly, it is not torn.

A relatively hard, compact and desirable roll is thus formed. without breaking the paper.

It is in order that the slitting roll may be raised to permitthe re-winding shaft 6 with its rolls of paper thereon to be removed from the machine and the empty r e-winding shaft replaced in the machine, that the slitting roll shaft has been mounted in the before-described gate or slide, and means have been provided for raising and lowering the latter. In the present instance, the means consist of racks 50 formed on the bars 38, in which the slitting roll shaft is j ournaled, pinions 51 mounted on a shaft 52 that is journaled on the uprights 39, and means for turning the said shaft. The latter means shown consist of a sheave 53 having a sprocket chain 54 wound thereon in such a direction that the pull of the sprocket chain shall tend to raise the gate, while the weight of the gate shall tend to wind the sprocket chain up on the sheave. The sprocket chain 54 is shown as connected to a treadle 55 adjusting the said weight the desired pressure of the slitting roll upon the rolls of paper will result. The bearings of the shaft 52 are made adjustable so that the slitting roll can be adjusted to bear evenly on all the rolls being formed on the re-winding shaft. In the present instance, the said bearings 59 are shown as adjustably secured to a vertical face of the uprights 39 and resting upon vertical screws 60', which pass through lugs 61 secured to the uprights.

Stating in full the operation of the illustrated embodiment of my invention: The shaft of the jumbo roll is laid in the bearings of the carriage 16 (andis preferably secured therein by means not necessary to describe), and the web of paper 1 is led over the pinch roll 4 and between the pinch roll and the drum 5, and then under the drum and between it and the serrating roll 9, and upward around the drum between the rear pinch roll 11 and the drum, and isthen rolled around the re-winding shaft sufliciently to engage it therewith. The gate which, during the latter operation, has been held elevated by pressure of the foot on the treadle 55 is allowed to descend until the slide down the ways 18 toward the.drum 5, and this tendency is increased by the pull of the weights on the sprocket chains 26. Thus the jumbo roll is held against the pinch roll 4, and the latter serves to support the paper in its passage to the drum. The pinch rolls also hold the paper smoothly against the drum, preventing its wrinkling, the pressure of the springs 33 against the arms carrying the pinch rolls assisting. As the web passes around under the drum, it is serrated at proper intervals by the knives 37 carried by the serr ating roll, which enter the grooves 10 in the drum, the paper being held tightly across the said grooves by the pinch rolls and by the pull of the slitting roll and the friction of the shaft of the jumbo roll, so that the serrating knives cleanly penetrate the paper instead of merely tucking it into the said grooves. The gearing for driving the slitting roll tends to drive it at a higher surface speed than that of the drum, so that said roll pulls the paper forward and winds it tighter around the re-winding shaft as well as pressing the paper roll being formed between itself and the drum, and :thusa relatively hard, compact roll is formed on the re-winding shaft, the yielding or friction drive of the slitting roll, however, preventing the slitting roll from tearing the paper.

The slitting knives slit the web longitudinally so that instead of a single roll of the width of the paper, a number of separate rolls are formed on the re-windmg shaft. The drive of the slitting roll shaft, consisting as it does of the sprocket wheel ll engaging the vertical stretch of the sprocket chain 42, drives the slitting roll equally well, regardless of the fact that the increasing diameter of the roll being formed causes the slitting roll to rise. The driving'gear of the slitting ro-ll also causes a uniform pulling action of the surface of the slitting roll on the surface of the roll being formed, this pull not changing as the roll being formed increases in diameter. This is much simpler than any arrangement for driving the re -winding shaft by gearing, since in the latter case it would be necessary to change the speed transmitted by the gearing as the diameter of the roll being driven increased. When the rolls being formed, however, reach the desired diameter, the web is severed, the slitting roll is raised by pressure on the treadle 55, and the re-winding shaft is lifted out of its vertical guides.

The rolls which have been formed are then stripped off the re-winding shaft, and the web is again started around the re-winding shaft and the formation of new rolls is be- Among the advantages of my invention may be stated the following:

The machine is one of comparative simplicity. The serrating, slitting and winding are all done in contact with the one drum 5,

against the surface of which the paper is held during the functions of serrating, slitting and winding.

The. web of paper being supported throughout its entire length, the liability to breakage is reduced to a minimum.

As the jumbo roll is, by the travel of the carriage, always kept in contact with the pinch roll, notwithstanding the constant decrease in diameter of the jumbo roll, such decrease in diameter does not result in any gap which the web has to span unsupported.

The pinch rolls tend to keep the paper smooth against the drum and prevent its wrinkling, and also to hold it under tension across the grooves in the drum so that good action of the serrating cutters is obtained.

While the slitting roll can be raised and lowered to permit there-winding shaft to be removed from and placed in the machine and to allow for increase ofv diameter of the rolls being formed, its driving mechanism is comparatively very simple.

The driving of the slitting roll at a faster surface speed than that of the drum results in. a relatively hard and small roll being formed and by mechanism which is comparatively very simple, and yet the yielding drive for the slitting roll prevents breakage of the web being operated upon.

The stock or parent roll being always in contact with and driven by the nearer pinch roll or the drum, is driven at the same surface speed as the pinch roll or the drum and also at the same speed as the roll being stock or parent roll, and in stopping, the

momentum'of the latter roll would carry it forward faster than the pinch roll or drum, and this would pile up the web and requirethat the stock or parent roll should be turned backward until the web was just 5 va web of paper thereto, grooves in said roll transverse to said web, a rotatably mounted serrating knife adapted to cooperate with said grooves, rolls adapted to press said web against said drum or roll on opposite sides of said knife, and springs tending to press said last mentioned roll against said drum or roll.

3. In a roll forming machine, the combination of a drum or roll, means for guiding a web of paper thereto, grooves in said roll transverse to said web, a rotatably mounted serrating knife adapted to cooperate with said grooves, rolls adapted to press said web against said drum or roll on opposite sides of said knife, springs tending to press said last mentioned rolls against said drum or roll, and means for holding a stock roll in contact with one of said last mentioned rolls.

4. In a roll forming machine, the combination of a drum or roll, means for guiding a web of paper thereto, said drum or roll having a revoluble cutter adapted to out said web against said drum or roll transversely to the web, a shaft supported by said drum or roll and upon which said web is adapted to be wound to form a roll, and a roll adapted to press the roll being formed a ainst said drum or roll.

5. In a roll forming machine, the combination of a drum or roll, means for guiding a web of paper thereto, said drum or roll having a revoluble cutter adapted to cut saidgweb against said drum or roll transversely to the web, a shaft supported by said drum or roll and upon which said web is' 'having; a revoluble cutter adapted to out said web against said drum or roll transversely to the Web, a shaft supported by said drum or roll and upon which said web is adapted to be wound to form a roll, a roll adapted to press the roll being formed against said drum or roll, and means for yieldingly driving said last mentioned roll at a surface speed greater than that of said first mentioned drum or roll.

7; In a roll forming machine, the combi- "nation of a drum or roll, means for guiding a Web of paper around said drum or roll,

said drum or roll having grooves transverse to said web of paper, a revoluble serrating knife adapted in cooperation with said grooves to serrate the web, rolls engaging said web upon opposite sides of said knife,

means for yieldingly pressing said rolls against said first mentioned drum or roll, a shaft supported by said drum or roll and about which said web, is adapted to be wound, means for guiding said shaft and permitting movement radial to said drum or roll, and a roll carrying longitudinal slitting cutters and adapted to bear against the roll being formed on said shaft.

I 8. In a roll forming machine, the combi- 7 nation of a drum or roll, meansfor guiding a web of paper around saiddrum or roll, said drum or roll having grooves transverse to said web of paper, a revoluble serrating knife adapted in cooperation with said grooves to serrate the web, rolls engaging said web upon opposite sides of said knife, means for yieldingly pressing said rolls against said first mentioned drum or roll, a shaft about which said web is adapted to be Wound, means for guiding said shaft and permitting movement radial to said drum or I roll, a roll carrying longitudinal slitting cutters and adapted to bear against the roll being formed on said shaft, and means for driving said roll at a surface speed greater than that of said first mentioned drum or roll.

9. In a roll forming machine, the combinationio'f a drum or roll, means for guiding a web of paper around said drum or roll, said drum or roll having grooves transverse to said web of paper, a revoluble'serrating knife adapted in cooperation with said grooves to serrate the Web, rolls engaging said web upon 0 posite sides of said knife, means for yiel ingly pressing said rolls against said first mentioned drum or roll, a shaft about which said web is adapted to be wound, means for guiding said shaft and permitting movement radial to said drum or roll,-a roll carrying longitudinal slitting cutters and adapted to bear against the roll being formed on the said shaft, and means for yieldingly driving said roll at a surface speed greater than that of said first mentioned drum or roll.

In testimony that I claim the foregoing I have hereunto set my hand this 26th day of November, 1918.

JOHN H. EHMANY, HARRY L. AoKnR.

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