US 2736508 A
Description (OCR text may contain errors)
Feb. 28, 1956 G. LANGBO 2,736,503
WINDING MACHINE FOR PAPER ROLLS Filed Feb. 19, 1953 3 Sheets-Sheet 1 FIGJ.
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WINDING MACHINE FOR PAPER ROLLS Filed Feb. 19, 1955 5 Sheets-Sheet 2 1W E/V TOR W WM M 1.
Feb. 28, 1956 LANGBO 2,736,508
WINDING MACHINE FOR PAPER ROLLS Filed Feb. 19, 1953 3 Sheets-Sheet 5 FIGS. 11
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LIMA-WK United States Patent 2,736,508 WINDING MACHINE FOR PAPER ROLLS Georg Langbo, Gulskogen, Norway Application February 19, 1953, Serial No. 337,810
Claims priority, application Norway February 21, 1952' 5 Claims. (Cl. 242-56 The present invention relates to improvements in machines for the winding of small rolls of wall paper or' similar paper Web wherein the winding is efiected without any central support of the roll to be wound, i. e. between a number of rotating rollers and in the absenceof any winding spindle, the paper web being drawn into the free space between the rollers by means of a pair of'input rollers engaging the paper web on either side, while the individual rollers of the set of rollers rotate in such a direction that the paper roll is maintained in rotation between the same, thereby accumulating the paper-web which is continuously introduced by means of the input rollers. In previously known machines of this type it has been necessary to interrupt the winding process Whenever the paper roll has obtained the desired size and then remove one or more rollers from the remaining rollers in the set in order to remove the completed paper roll. A new paper web is then introduced into the set of rollers and the winding is started anew. The operation described is cumbersome and time wasting.
It is an object of the present invention to provide a machine wherein the winding of a fresh roll is initiated without any interruption of the winding process.
According to the invention this is achieved by providing the machine with two or more such sets of rollers asindicated above, mounted in a rotatable frame structure in such a manner that at least one roller of each set may be caused to move away from the remaining rollers of the same set of rollers when the set is in a predetermined position of the rotation of the supporting frame. The operation of the machine, the supply and cutting: of the paper web are effected in such a manner-that the-winding of one complete paper roll is efiected while theframe-jis rotating from one position, in which the web is cut; and introduced between the input rollers to a second position in which one or more rollers are caused to move away from the remaining rollers so as to permit the removal of the completed paper roll from the space between the rollers.
The roller or rollers which, at a predeterminedti'me is or are to move away from the remaining rollers of a set of rollers are, according to the invention, mounted in a pair of levers which are pivotably mounted in the rotatable frame and adapted to cooperate with a suitably situated stop in the machine framework so as to make the roller or rollers perform such a movement as to cause the completed roll to fall out of or be removable from the space between the rollers of the set of rollersin question. The levers in which the roller or rollers is or are mountedrnay also be weight or spring actuated in such a manner that the movable roller or rollers is or are forced in a direction against the remaining rollers of the set of rollers during the winding process. With the arrangement indicated, the completed paper rolls are automatically released in the proper position during the rotation of the supporting frame, the movable roller or rollers being keptresiliently against the remaining rollers in such a manner that? the 2,736,508 Patented Feb. 28, 1956 engagement pressure between the rollers and the paper r0111 to be wound is maintained during the entire winding process, from a very small roll diameter to full size.
In an especially suitable embodiment of the machine according to the invention, the rollers of each of the individual sets of rollersare driven from the centre of the rotatable supporting fr'amethrough; an intermediate shaft mounted in the pivot of one of the levers of the pair carrying" the" movable roller or rollers, whereby not only the stationary rollers but also the movable roller or rollers are rotated with an unvariable velocity in a very simple manner independently of the relative distances between the rollers ofthe set.
On the accompanying' drawings an embodiment of a winding machine ac'cordingto the invention is diagrammatically' shown. On the drawing, generally, only such parts of the machine are shown asare essential to the understanding of the invention and the manner of operation of the machine, while a number of details, such as shafts, bearings, and gearsv are indicated by the centre lines only, in order not to make the drawing unreadable.
Figure l is a top view of the machine.
Figure 2 is a sectional view. on the line IIII of Figure 1, as seen in the direction of the arrows IIII.
Figure 3 is a sectional view taken along the line III -Ill of Figure 1, as seen-in the directionof the arrows IIIIII.
Figure 4, is apartial elevational view, as seen in the direction of, the arrows IVIV of Figure 1.
On, the. drawing, 1 isjthe main shaft of the machine and 2, 2" a pair of crossformed end members adapted to be rotated with the main shaft and carrying, directly or indirectly, thevarious roller-s of the machine.
Mounted on the main shaft 1, outside of the member 2' is a pulley 3 which, through a belt 4 is driven from anyexterior driving source, not shown. Outside of the other member'Za cam 5 issecured to the main shaft 1, and outside of the cam 5 is a. stationary guiding cam 6. The earn 5' is adapted to cooperate with a feeler member 7 carried'by an arm 8'angularly adjustably secured to a toothedsegment 9='pivotally mounted at 10 in the machine frameandcarrying aprojection 11 extending approximately-in the opposite direction of the arm 8 relatively to the pivot- 10, a spring 12" being mounted between the free-end ofithegprojection ll and the machine frame tending toforee the feeler 8 against thecam 5'; The segment 91's; in engagement with atoothed wheel. '13 pivotally mounted at 14 inthe-rnachine frame. The pivot 14 also carriesv a number. of vertically extendingprojections 15 carrying between; their lower endsaknife 16.
In the drawing the paper web to be wound is indicated at 17, while the paper web rollis indicated at 18. In the embo'dimentshownon thedrawings, the members 2, 2 aremade three armed and themachine consequently provided with three sets of rollers I, II and III with associated driving'elements. The various parts of the three sets are giventhe same reference numbers, but in individual hundreds, 100, 200 and 300, respectively.
', Each set of rollers I',.II and III comprises five rollers 103'to-107, 203 to 207 and 303 to307, respectively and one leading roller 127, 227 and 327, respectively, of which thfitrollers 103 to 105,127, 203' to 205, 227, 303 to 305 and 327' arem'ountedzinthe members'2, 2 while the rollers 106, 107,- 206, 207, 306 and307 are mounted in pairs of levers 108, 208 and 308', respectively which are pivoted at 109-, 209 and 309, respectively, in the members 2, 2' in such a manner that thefree=spacebetween the rollers of; each setmay vary, aswill be described below.
The-rollers of the sets' I, II and- III are rotated in the directions indicated fo the rollersof set'II in- Figure 3, by:.-meansof :chain; or belttr'ansini'ssionfrom the pulley 3 2,7se,sos
on the main shaft 1. For this purpose a pulley 210 is, as especially shown in Figure 4, mounted at 209 and is driven by means of the chain or belt 211 from the pulley 3, the pulley 210 being in driving connection with the intermediate shafts 214 and 215 mounted in the member 2' and the lever 208, respectively through chains or belts 212 and'213, respectively. The shafts 214 and 215 are provided with toothed wheels 216 and 217, respectively which engage wheels 218, 219 and 220, 221, respectively, mounted on the shafts of the rollers 203, 204 and 206, 207 respectively, while the roller 205 is driven from the shaft of the roller 204, for instance through gearing which is not shown and which, in fact, may be omitted as the roller 205 is in frictional engagement with the roller 204. Completely corresponding arrangements are made in connection with the roller sets I and II.
The cam 5 which is secured to the main shaft 1, Figure 2, carries the pivots 109, 209, 309 of the levers 108, 208, 308, respectively. Each of the said pivots carries a lever 122, 222, 322 respectively, each carrying at one end a weight 123, 223, 323, respectively, and being at the other end provided with a feeler block 124, 224, 324, respectively, adapted to cooperate with the stationary curved guiding cam 6. The weights 123, 223, and 323 and their distance from the pivots 109, 209, 309 respectively, are so chosen relatively to the weight of the rollers carried by the levers 108, 208, 308 respectively and the length of the said levers that the lever system formed by each of the levers 122, 222, 322 together with the corresponding roller carrying levers 108, 208, 308 respectively is in approximate balance, with a slight overweight on the part of the levers 108, 208, 308. The guide 6 is so made, for instance in the form of an arc of a circle with its centre at a small distance from the axis of the shaft 1, that the levers 108, 208, 308, respectively, are turned slightly away from the corresponding roller carrying ends of the members 2, 2' when the corresponding feeler block 124, 224 or 324, during the rotation of the cam 5 in the direction of the arrow indicated in Figure 2, is moved from the right to the left along the guide 6, for a purpose which is to be explained below.
The circumference of the cam 5 is provided with three distinct recesses, 125, 225, 325, each having a sharp edge 126, 226, 326, respectively, at the front end of the recess during the rotational movement of the cam 5. When the feeler member 7, during the rotation of the cam 5 and under the influence of the spring 12, descends along the edges 126, 226 or 326 the segment 9 is turned about its axis 10 and transmits a rotational movement to the gear 13 which will turn in the direction of the arrow indicated in Figure 2 and thereby cause the knife 16 to perform a quick cutting movement to the right in Figure 3.
The machine described operates in the following manner:
It is initially presumed that all parts are in the positions shown in the accompanying drawings and that the shaft 1 is driven by means of the drive 4, and that a paper web 17 is supplied from a supply, not shown, over a guiding roller 127 to the roller 203 and hence between the latter roller and the roller 205 and then wound into a roll 18 without any central support by the fact that the rollers 203 to 207 are rotating in the directions shown by arrows in Figure 3.
At the continued rotation in the direction of the arrows shown in Figures 2 and 3, the feeler member 7, Figure 2, will leave the recess 125 of the cam 5, whereon the toothed segment 9 turns to the left and the wheel 13- together with the shaft of the same is turned and the arms carrying the knife 16, Figure 3, perform a quick movement to the right, cutting the paper web 17 just above the roller 103. The fresh end of the web 17 is.
then carried along by surface engagement with-roller 103 i into the free space between the rollers of the roller set I,
' end of the web 17 is drawn into the roll 18 in the roller set II. At the same time the feeler 224- carried by the lever 222 is disengaged from the stationary guide 6 and the lever 208 will swing downwardly and move the rollers 206 and 207 away from the rollers 203 and 204 to the end that the paper roll 18 may be removed from the space between the rollers of the roller set II.
The winding of the roll between the rollers of set I is then continued during the continued rotational movement of the members 2, 2 etc. until roller set I has arrived in a position slightly beyond that of roller set II in the drawings, wherein the feeler 7 enters the recess 225, whereupon the same operational sequence takes place as described above, the feeler 124- being now in engagement with the guide 6 thereby controlling the roller set I.
In this manner one roll after another is continuously and automatically wound, the size of each roll being de termined by the rotational speed of the members 2, 2' and the peripheral velocity of the rollers, which latter velocity is essential for the introduction of the paper web 17 into the free space between the rollers.
Obviously the details of construction of the various parts may vary within wide limits without departing from the scope of the invention as defined in the accompanying claims, the possibilities being obvious to those skilled in the art and, consequently, not described herein. It may, however, be mentioned that the rollers 103, 104, 106, 107 and their equivalents are preferably made in the form of cam rollers, i. e. rollers having their surfaces subdivided into a number of parallelly disposed annular cams, while the roller 105 and its equivalents are preferably formed of a number of individual rings situated along the roller axis. If desired the said rings may be made in the form of ball bearing rings tightly fitted on the roller shaft.
1. An automatic winding machine for making paper rolls comprising a plurality of sets of mutually parallelly disposed rotatable rollers for the consecutive winding of one roll after another in the free space enclosed by the said rollers of each of the said set of rollers, a rotatable frame structure including end members supporting the said sets of rollers therebetween, lever members pivotally mounted in the said end members and supporting therebetween at least one roller of each set of rollers, means mounted in the machine for cutting the paper web at the completion of the winding of a roll, means for continuously rotating the said frame structure and each of the rollers of the said sets of rollers, means for actuating the said paper cutting means, and means for pivoting the said lever members, said cutting means and said pivoting means being actuated when the associated set of rollers reaches a predetermined position in the rotation of the said frame structure.
2. A machine as claimed in claim 1, wherein at least one of each pair of lever members carrying between the same at least one roller of a set of rollers is loaded so as to cause the said one roller to be urged in a direction toward the remaining rollers of the set.
3. A machine as claimed in claim 1, wherein the means actuating the lever members carrying at least one roller of each set of rollers comprises a stationary guide member cooperating with a feeler block associated with one of the said lever members.
4. A machine as claimed in claim 1, wherein the means actuating the paper cutting means comprises a rotatable cam member cooperating with a pivotable feeler member,
.the said cutting means comprising a pivotally mounted knife member extending substantially parallel to the rollers.
5. A machine as claimed in claim 1, comprising drive transmission means extending from the main shaft of the rotatable frame structure to the pivots of the pivotable roller carrying levers and further drive transmission means extending from the said pivots to the individual rollers of 5 each of the said sets of rollers.
References Cited in the file of this patent UNITED STATES PATENTS Waring Aug. 1, 1911 Marresford Aug. 14, 1928 Vernon et a1 Oct. 9, 1934