US2711861A - Core shaft supporting means for slitting machines - Google Patents

Description

June 28, 1955 P. R. HEYGEL ETAL 2,711,861

CORE SHAFT SUPPORTING MEANS FOR SLITTING MACHINES Filed Dec. 22, 1949 4 Sheets-Sheet l June 28, 1955 P. R. Hr-:YGEL ET AL l 2,711,861 I CORE SHFT SUPPORTING MEANS FOR SLITTING MACHINES med Dec. 22,1949 4 sheets-sheet 2 INVENfroRs PAI/L HEVGEL HND BY WML-'sr at Muff/mac# June 289 1955 P. R. HEYGEL Erm. 297339363 CORE SHAFT SUPPORTING MEANS FOR SLITTING MACHINES Filed Dec. 22, 1949 4 Shets-Shee't 5 MSN wm 4 TTOR/VEVJ NVENToRs PAI/L HEYGEL AND EFNEJT G. /lLATf/YH l m NM www '.Fune 28, 195 P. R, HEYGEL ETI/as. ZJLSG CORE SHAFT SUPPORTING MEANS FOR SLITTING MACHINES Filed D66. 22, 1949 4 Sheets-Sheet 4 IN V EN TORS ATTORNEYS uns CURE SHAFT SUPPORTING MEANS FR SLETTENG MACHENES Parri R. Heygel, Asheville, and Ernest G. Kaltenbach,

Pisgah Forest, N. C., assignors to Ecusta Paper Corporation, a corporation of Delaware application December 22, 1949, Serial No. 134,574

3 Claims. (Ci. 242-65) This invention relates particularly to slitting machines such as are used to slit paper webs and the like into a plurality of smaller web portions. The improved slitting machine features provided according to the present invention may also in general be employed to advantage in other types of web processing equipment as will appear more in detail below.

One of the' principal difficulties encountered in processing web material, especially when slitting of a paper web is involved, is the problem of maintaining adequate lateral alignment of the various operating elements so that the web material may be run smoothly and evenly from each operating element to the next one. ln the processing of a web of cigarette paper, for example, to slit the web and rewind the slit web portions into bobbins for use in a cigarette making machine, it is necessary to rewind the bobbins very exactly in order to form them straight and true enough for satisfactory use on the cigarette making machine, and this cannot be done unless the lateral alignment of the slitting machine operating elements can be maintained very closely. This problem is made further diiiicult by the fact that some of the operating elements, such as the core shafts, must be arranged in the machine so that they are removable which precludes the use of any permanently lixed mounting arrangement.

According to the present invention these difficulties are overcome in a particularly effective manner by providing lateral locating means or devices for each of the operating elements which are characterized in general by the fact that they maintain the lateral alignment solely I with respect to one side of the machine frame. By this arrangement, the relative lateral alignment of the operating elements can be set and maintained with great accuracy, because the alignment of each element is determined at only one point rather than at spaced points, and this arrangement is further exceptionally well adapted for locating the removable operating elements with ease and facility.

These and other features of the present invention are described in further detail below in connection with the accompanying drawing, in which:

Fig. l is a side elevation of a slitting machine embodying the present invention;

Fig. 2 is an end elevation from the right as seen in Fi l;

iig. 3 is a central vertical section corresponding generally but reversed in relation to Fig. l;

Fig. 4 is an enlarged sectional detail taken substantially on the line 4 4 in Fig. l, and illustrating the arrangement of the core shafts and the pivoted core shaft supporting arms;

Fig. 5 is an enlarged detail taken substantially on the line 5 5 in Fig. 2, and consisting essentially of a side elevation of the left pivoted supporting arm for the rear core shaft as seen in Fig. 2;

Fig. 6 is a similar enlarged detail of the right pivoted supporting arm for the rear core shaft as seen in Fig. 2;

2,7ll,86l

Patented Jurre 233, 1955 'ice Fig. 7 is an enlarged horizontal section of the supply roll core shaft arrangement, as seen in Fig. l; and

Fig. 8 is a fragmentary detail taken substatnially on the line 8S in Fig. 7.

The slitting machine shown in the drawing is of a generally conventional type in which a machine frame 1i! is arranged to support a core shaft 12 for a supply roll R from which a web W may he trained through the machine, as over guide rolls at 14, 16 and 18, for slitting into smaller web portions and rewinding into bobbins as at B and B. The improved arrangements of the operating elements provided by the present invention may be illustrated conveniently in relation to a slitting machine of this type, although, as mentioned above, these arrangements may also be employed in other types of web processing equipment, if desired.

According to the present invention, the core shafts 20 and Z2, provided for rewinding the bobbins B and B', and which constitute operating elements that must be removable, are provided with specially arranged locating devices for maintaining the bobbins in accurate alignment in the machine so that they will be wound straight and true during the slitting operation. The arrangement of the core shafts in this manner is shown best in Fig. 4 of the drawing, in which. an enlarged detail of the core shaft 20 is illustrated, and which corresponds exactly with the arrangement of the core shaft 22. As shown in Fig. 4, the core shaft 2i) suitably comprises a cylindrical shell member 24 of suitable proportions for carrying the paper cores or liners P on which the bobbins B and B are received during rewinding, and which are commonly positioned by intermediate spacers as at S.

The core shaft shell member 24 is fitted at each end with plug members 26 formed to extend at each end of the core shaft 2@ so as to provide journal portions as at 28 and 30. Adjacent each of the shell members 24 these plug members are also formed with a threaded portion as at 32 to receive a retaining plate 34 and a nut element 36 by which the paper cores P and spacers S may be clamped in position on the core shaft 20. The retaining plates 34 are also preferably fitted with extending pins or dowels 38 disposed to be slidingly received in apertures 4t) formed in the core shaft shell member 24 so that any turning movement of the retaining plates 34 with respect to the shell member 24 is prevented and loosening of the nut elements 36 during the slitting operation is thereby avoided.

The above noted journal portions 28 and 30 of the core shaft 20 are each fitted with double flanged rotatable sleeve or collar units as at 42 and 44. The sleeve unit 42 is fixed permanently in place on the journal portion 2S, as will be pointed out more in detail presently, while the other sleeve unit 44 is fitted with a spring pressed ball member as at 46, or other similar yieldable means, adapted to engage a circumferential groove as at 48 in the journal portion 3i) and thereby provide for mounting and removal of the sleeve unit 44 at this end of the core shaft 2@ as desired. The sleeve unit 44 is made removable in this manner so as to facilitate mounting of the paper cores P and removal of the rewound bobbins B from the core shaft 20 as necessary.

These rotatable sleeve units 42 and 44 are arranged on the journal portions 28 and 3i) with a lateral spacing in relation to the core shaft 20 adapting them for disposition on pivoted supporting arms 50 and 52 carried by the machine frame 1t). These supporting arms 50 and S2 are bifurcated at their extending ends as at 54 and 56, such as is usual in slitting machines of this type, to receive the core shaft 20, and the rotatable sleeve units 42 and 44 are adapted for disposition in these bifurcated ends 50 and 52 as journal bearings for the core shaft 20.

lt has already been noted above that the rotatable sleeve unit 42 is fixed permanently on the journal portion 28. This permanently fixed disposition of the sleeve unit 42 is used for locating and aligning the core shaft with respect to the frame structure of the slitting machine. The rotatable sleeve unit 42 is permanently fixed on the journal portion 2S by seating it against a shoulder formed at 58 on the journal portion 28 and containing it against this shoulder by a collar 60 which is pinned on the journal portion as at 62. This containing collar 60 is further fitted with a thrust bearing unit 64 so as to allow for rotation of the sleeve unit 42 under the containing pressure of the collar member 60. The extending end of the journal portion 28 is further iitted with a centrally disposed pin element 66, which is preferably formed with a knurled tip as at 66', and which is provided to receive the locating pressure on the core shaft for positioning a flange portion of the sleeve unit 42 against the supporting arm as at 68 to locate the core shaft 20 with respect to the machine frame l0, as previously mentioned.

The locating or positioning pressure is exerted on the core shaft 20 through the pin element 66 by a locating device carried on the supporting arm 50, which comprises a swinging arm 70 mounted on a pivot rod 72 extending from the supporting arm 50. The swinging arm 70 is braced by a second rod 74, which is also .iounted on the supporting arm 50, and which is fitted with an extending lip at 76 to accommodate swinging movement of the above mentioned swinging arm 70, and further to act as a rest for the arm 70 when the locating device is disengaged from the core shaft 20. The free end of the swinging arm 70 is fitted with a sliding plug unit 78, which is assembled with a threaded stem 80 that engages and extends through a positioning cap S2 to carry an adjusting handle at 84 and a locknut at d6. The other end of the plug unit 78 is joined through a universal joint as at 88 to a positioning nose 90, which is fitted with a thrust bearing unit 92 having a central aperture in its outer face that may also be suitably knurled to engage the knurled tip 66 of the pin element 66 disposed at the end of the journal portion 28 of the core shaft 20.

This arrangement allows the positioning nose to be adjusted against the pin element 66 by manipulation of the adjusting handle 34 to exert the necessary locating pressure on the end of the core shaft 20, and when this locating pressure has been properly adjusted, the adjustment may be fixed by the locknut 36. The positioning nose 00 is connected to the plug unit 78 by the universal joint 8? to allow the positioning nose 90 freedom for finding a proper fit with the pin element 66 at the end of the core shaft 20, and so that any minor misalignment of the locating device with the core shaft 20 will not affect the smooth running of the core shaft 20. ln order to maintain the positioning nose S2 in general position for finding the pin element at the end of the core shaft 20, a guiding cup 914 is fitted on the swinging arm 7i? in loosely surrounding relation to the positioning nose 90 as shown in Fig. 4.

The pivoted supporting arms S0 and 52 as already noted have bifurcated extending ends 54 and 56 for supporting the core shaft 20, as is usual in slitting machines of this type, and these pivoted supporting arms form fioating support means as is also usual in such slitting machines to allow the displacement necessary for accommodating the increasing diameter of the bobbins B and B' as they build up on the core shaft 20 and 22 during the slitting operation. The pivoted supporting arms 5t) and S2, however, are uniquely formed according to the present invention for mounting on the machine frame 10. As is shown at Fig. 4, both of the pivotcd supporting arms 50 and 52 flare outwardly at their pivoted ends to a hub portion 96, which is formed to straddle the frame structure 10, and which is fitted ting operatic-n.

at each end with ball bearing units 98 for mounting on a pivot shaft 100 carried by the frame structure 10. As will be seen, this arrangement of the hub portion E@ allows a relatively wide spacing of the bearing .units 93 thereby provides exceptional strength for the supporting arms 50 and 52 against lateral stresses.

t is further important to impose a drag on the pivoting movement of these supporting arms 50 and 52 in order to prevent chattering of the core shafts during the slit- The supporting arms are normally s *ed during the slitting operation by cords 102 zing to a hanging weight 104, as shown in Fig. l, but it is still necessary to impose a drag at the point of pivoting of these arms in order to obtain fully satisfactory operation. This is done according to the present iion by arranging friction elements, such as disks .t,.ion material as at 106 and 108, on the supporting arm pivot shaft 100 adjacent the hub portion 96, and providing means assembled on the pivoting shaft 100 for 'ig the friction elements 106 and 108 to the hub ptn n 96 and thereby imposing the necessary drag onthe pivoting movement of the Supporting arms 50 and 52.

The means employed for applying these friction elements 1Go and 16S suitably comprises an externally threaded collar 110 fixed on the pivot shaft 100 as by set screws lll, and carrying at least two internally threaded collars 114 and 116 on its threaded surface. The fixed "ireaded collar 110 is further formed with a ltcyway as at 118 in its threaded surface, and carries a washer element 120 which is formed with a lug as at 2.20 for engaging the keyway 113. By this arrangement, the washer 120 is prevented from turning with res ect to the collar 110, and by interposing this Washer 120 between the internally threaded collars 114 and 116 carried on the collar 110, the friction elements 106 and 308 can be applied to the hub portion 96 with the desired pressure and locked in place effectively.

As indicated in Fig. 4, this arrangement for imposing drag on pivoting movement of the supporting arms is exactly the same for each of the supporting arms S0 and 52. Also, the pivoted supporting arms are provided in corresponding pairs 50 and S2 for each of the core shafts 20 and 22, and these pairs of pivoted supporting arms 50 and 52 are mounted on exactly similar pivot shafts E00, which in turn are carried by the machine franie lo in exactly the same manner with the single exception that the machine frame 10 is fitted according to the present invention with extention brackets 122 to carry one of these pivoting shafts 100. These extension brackets may he provided for carrying either of the pivoting shafts 100 as desired. In the drawings, they are shown provided for the pivot shaft carrying the supporting arms for the core shaft 22.

The purpose of providing these extension brackets 122 on the machine frame l0 is to arrange one of the pivot shafts 00 to carry a pair of the supporting arms 50 and 52 so as to support one of the core shafts, as 22, in relation to an auxiliary rewind roll 124, as described and claimed in copending divisional application Serial No. 456,l72, filed August 30, 1954. As previously noted, the supply roll R is carried by a core shaft 12, and this core shaft 12 may be fitted, as is common, with a brake drum $.88 for action with an adjustable braking means as at T to impose proper tension on the web being withdrawn from the supply roll R, and to prevent the supply roll R from over-running whenever it is necessary to shut down the machine during the slitting operation. The supply roll core shaft 12 is formed with kcyways as at 192 so that the brake drum 18S may he fixed in place as indicated at 194 in Fig. 7, and also to provide for receiving laterally slidaole double flanges rotatable collars or sleeves 196 at each end of the core shaft i2 that are adapted for disposition in the machine frame 10 as journal supports for the core shaft. At one end the core shaft 12 is also fitted with a rotatable collar 198 which is seated against a shoulder 200 and secured in place by a locknut 202. A positioning arm 204 which is pivoted on the machine frame is arranged to engage the bearing collar 198 as illustrated in Fig. 8. This positioning arm 204 is carried on a pivot stud 206 which is mounted for lateral sliding adjustment in a bore 208 provided in the machine frame 10, by means of a screw stem 210 which is fitted with a manipulating handle at 212. As the rotatable collar 198 is fixed on the core shaft 12, lateral adjustment of the positioning arm 204- will result in aligning the supply roll R in machine frame 10, as desired, in relation to the auxiliary rewindroll 124, and the core shafts 28 and 22, which may be aligned on the machine frame with similar accuracy and facility according to the present invention as previously pointed out.

We claim:

l. 1n a slitting machine, the combination with a machine frame incorporating floating support means for a core shaft, of a core shaft fitted adjacent each end with rotatable sleeves, said sleeves being spaced laterally on said shaft in correspondence with said support means whereby said shaft may be disposed on said machine frame with said sleeves received by said support means and forming journal bearings for said shaft, one of said sleeves having a fianged portion adapted for lateral positioning with respect to said support means, and means mounted on said machine frame for pressing said anged portion into positioning contact with said support means and thereby laterally locating said core shaft on said machine frame.

2. In a slitting machine, the combination with a machine frame incorporating pivoted arms forming fioating support means for a core shaft, of a core shaft fitted adjacent each end with rotatable sleeves, said sleeves being spaced laterally on said Shaft for disposition in said pivoted arms as journal bearings for said shaft, one of said sleeves having a anged portion adapted for lateral positioning with respect to one of said pivoted arms, and means mounted on the same supporting arm for pressing said anged portion into positioning contact with said supporting arm and thereby locating said core shaft on said machine frame.

3. In a slitting machine, the combination with a machine frame incorporating pivoted core shaft supporting arms, of a core shaft fitted adjacent each end with double flanged rotatable collars, said collars being spaced laterally on said shaft for disposition in said supporting arms as journal bearings for said core shaft, and means mounted on one of said supporting arms for pressing said core shaft at one end and thereby pressing a liange portion of the adjacent rotatable collar against said support arm whereby said core shaft may be located laterally in fixed position on said machine frame.

4. In a slitting machine, the combination defined in claim 3 and further characterized in that said adjacent rotatable collar is fixed on said core shaft, and the other rotatable collar is fitted with yieldable retaining means for mounting and removing said collar at the other end of the shaft as desired.

5. In a slitting machine, the combination with a machine frame incorporating pivoted core shaft supporting arms, of a core shaft adapted for disposition in said supporting arms, a fixed pivot shaft mounted on said machine frame for carrying said supporting arms, friction elements disposed on said pivot shaft adjacent said supporting arms, and means assembled on said pivot shaft for laterally applying said friction elements to said supporting arms and. thereby imposing a drag on the pivoting movement of said supporting arms.

6. In a slitting machine, the combination with a machine frame incorporating pivoted supporting arms forming floating support means for a core shaft, of supporting arms formed with pivot hub portions, a fixed pivot shaft mounted on said machine frame for carrying said supporting arms at said hub portions, friction elements disposed on said pivot shaft on each side of said hub portions, and means assembled on said pivot shaft for applying lateral pressure forcing said hub portions against said machine frame with said friction elements interposed, and thereby fixing the lateral position of said supporting arms with respect to said machine frame and irnposing a drag on the pivoting movement of said supporting arms.

7. In a slitting machine, the combination defined in claim 6 and further characterized in that said friction elements comprise annular disks of friction material, and said applying means comprise a collar member fixed on said pivot shaft, said collar member being externally threaded and having a keyway formed in its threaded surface, at least two internally threaded collars engaging the external threads of said first mentioned collar member, and a Washer formed with a lug engaging said keyway disposed on said first mentioned collar member between said internally threaded collars.

8. In a web processing machine, the combination with a machine frame, of a core shaft for a web supply roll, said core shaft being fitted with laterally slidable and rotatable sleeves adjacent each end and spaced at each side of the web supply roll thereon, said sleeves being adapted for disposition on said machine frame as journal bearings for said core shaft, and said core shaft being further fitted with a laterally fixed rotatable collar, and laterally adjustable locating means disposed on said machine frame for engaging said rotatable collar and thereby laterally locating said core shaft on said machine frame.

References Cited in the file of this patent UNlTED STATES PATENTS 311,261 Rosquist Ian. 27, 1885 668,945 Allen Feb. 26, 1901 801,036 McCorkendale Oct. 3, 1905 894,206 Husby July 28, 1908 1,223,104 Pickett Apr. 17, 1917 1,267,080 Judelsohn May 21, 1918 1,355,164 Cameron et al. Oct. 5, 1920 1,457,822 Crandell June 5, 1923 1,515,382 Cheesman Nov. 11, 1924 1,795,506 Reiners et al. Mar. 10, 1931 1,855,877 Blood et al. Apr. 26, 1932 2,023,681 Hall Dec. 10, 1935 2,205,563 Johnstone June 25, 1940 2,460,694 Haswell Feb. 7, 1949 FOREIGN PATENTS 269,854 Great Britain Complete not accepted

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