US2837293A

US2837293A - Paper winding machine

Info

Publication number: US2837293A
Application number: US518169A
Authority: US
Inventors: Everett W Clem
Original assignee: Rice Barton Corp
Current assignee: Rice Barton Corp
Priority date: 1955-06-27
Filing date: 1955-06-27
Publication date: 1958-06-03
Anticipated expiration: 1975-06-03

Description

June 3, 1958 w, CLEM 2,837,293

PAPER WINDING MACHINE Filed June 27, 1955 3 Sheets-Sheet 1 INVENTOR Here/l If 67am BY i ATTORNEY June 3, 1958 r c 2,837,293

PAPER WINDING MACHINE Filed June 27, 1955 5 Sheets-Sheet 2 I N VENTOR fi e/ell (76172 BY LQ' MV ATTORNEY June 3, 1958 Filed June 27, 1955 E. W. CLEM PAPER WINDING MACHINE 3 Sheets-Sheet 3 REG MR PUMP RESER- on.

PuMP INVENTOR ATTORNEY Un States Pat w PAPER WINDING MACHINE Everett W. Clem, Shrewsbury, Mass., assignor to Rice- Barton Corporation, Worcester, Mass., a corporation of Massachusetts This invention relates in general to paper winding machines, and in particular to the means for moving the reel spoolinto and out of surface contact with the large driven reel drum or roll which drives the spool.

In conventional machines of the type disclosed herein the winding spool is held against driving drum by means of pneumatic pressure; and this same means, which consists of a pair of spaced pneumatic cylinders, is also used for moving the spool and drum apart when it is desired to change to another spool. The latter action is accomplished by introducing compressed air against the opposite sides of the pistons. Then, after the spool and drum have been properly spaced apart, a jet of air (or jets of air) is forced against the underside of the web in the space between the spool and drum. As a result of this air blast, the web is blown up and over a new reel, as will appear hereinafter with particular reference to Fig. 3 of the drawings. It is extremely important that the rolls be separated the same amount at the ends; otherwise, the web will be blown to one side rather than directly up.

The difliculty encountered in the conventional apparatus described above is in the separating operation. The frictional forces at the ends of the spool shaft or spindle are rarely, if ever, balanced, and, since the motive force tending to overcome thesefrictional forces is a compressible fluid, it oftentimes happens that one end of the spool is moved farther away from the drum than the other. The operator must then try to correct for this unbalance within the limited time available to him. It should be at once apparent that this arrangement produces a very awkward situation.

One of the features of my invention involves the use of a, hydraulic (incompressible) fluid for moving the spool away from the drum. As will appear hereinafter, the hydraulic system will provide a positive displacement of the pistons and insure, at all times, a uniform movement at the ends of the spool shaft.

However, the use of pneumatic pressure to hold the spool against the drum is also very desirable, because it gives a resiliency which is unobtainable with a hydraulic system. In many instances, the winding on the spool is non-uniform such that the wound roll is out-of-round. In the case of an out-of-round roll of paper, the hydraulic system would be unable to keep this roll in constant, uniform contact with its driving drum. Also, when Winding relatively soft material, such as tissue paper, etc.', it

is important to have this resiliency which only the pneu-' 2,837,293 Patented June 1953 ment at the ends of the winding spool when moving the latter away from its driving drum.

Another object ofmy invention is to provide a system for the purpose described in which the desirable features of hydraulic pressure and pneumatic pressure are simply and effectively combined.

Other and further objects and advantageous features of my invention will hereinafter more fully appear in connection with a detailed description of the drawings in which:

Fig. 1 is a front view, with some parts in section, of a paper winding deviceembodying my invention.

Fig. 2 is a plan view of the apparatus shown in Fig. 1.

Fig. 3 is a front view, similar to Fig. 1, showing the spool and drum in their separated relationship.

Fig. 4 is a schematic diagram of the hydraulic andpneumatic circuits employed in my invention.

Fig. 4a shows the four-way valve in a position re-- versed from Fig. 4.

Referring to the drawings in detail, in Fig.1, a web of paper W passes from the paper making machine (not shown) over the driven drum or roll 1 and onto. thewinding spool 2. The spool 2 is driven in conventional fashion by surface contact of its accumulating convolutions of paper 'with the drum 1, under pneumatic pressure maintained against a pair of

pistons

3 and 4" mounted within cylinders 5 and '6, respectively. (See also Fig. 4.) A pair of

piston rods

7 and 8 connect from the

pistons

3 and 4 to a pair of slide blocks 9 and 10: which are horizontally slidable upon frame members 11. Slide blocks 9 and 10 support the central shaft 12 of the spool 2. I

Piston 3 divides the interior of cylinder 5 into two;

chambers

13 and 14; piston 4 similarly divides cylinder 6 into

chambers

15 and 16. Air, under pressure, is in-" troduced into

chambers

13 and 15 through pipe lines 17;

and 18, respectively. Oil is introduced into

chambers

14 and 16 through

pipe lines

19 and 20, respectively. The; oil is permitted to overflow from

chambers

14 and 16 by means of

pipe lines

21 and 22.

Referring now to Fig. .3, when a sufficiently large roll. of paper has been wound on spool 2, and it is desired to: commence winding on a new spool.23,'spool 2 is separated from its' driving drum 1 by introducing a 111688 ured quantity of oil (as will appear hereinafter) into the

chambers

14 and 16 so as to force the

pistons

3 and 4 to the left. When the rolls have been separated several:

inches, a blast of air from air jet 24- which is attached to the doctor blade 25 will cause the slack portion of the web W to liftup (as shown in Fig. 3) and wrap a around the new spool 23. The end of the Web is snapped or cut from the filled spool 2 and the latter is removed in the slide blocks 9 and 10. The winding then continuesi- I from the slide blocks 9and 10. As the paper now'winds on the new spool 23, the latter is swung down, by its usual supporting arms (not shown) along the periphery of drum 1 until the shaft 26 of the new spool is properly seated in normal fashion until sufiicient paper is wound upon the new spool; at this point, the spool is again changed in the;- same manner as described above. j.

Fig. 4 shows, diagrammatically, the piping conuec-r.

'tions for both the pneumatic and hydraulic circuits. For

3 Therefore, it is a principal object'of-my invention to I provide a means for insuring positive uniform displacechambers.

the lefthand sides of. cylinders 5 and 6, as represented" by

chambers

13 and 15, respectively, I have provided anair pump 27 and a pair of

pressure regulators

28 and, 29-. which introduce air under controlled pressure to the 2-. valves.wi'llrpermit airto.escape when the hydraulic IPIBSrJ In order to prevent the pressures within :2

'3 su e within chambers 14 and 1:6 force Pistons 3. nd 4 respectively, to the left.

*For the hydraulic circuit, I have provided an oil pump 32-and a reservoir .33 which supplies oil for said pump. Under the normal operating conditions shown in Fig. l, with a spool urged pneumatically against its; drivingv drum, there is a constant low pressure circulation of oil through the

cylinder chambers

14 and 16, so as to keep them full. Under these conditions, as shown in Fig. 4,. the hydraulic fluid (:oil) passes from pump 32, into line 34, through the four-way valve 35 and into the line 36. From. line 36 the oil passes, in parallel, into

lines

37 and 38 through one-

way check valves

39 and 40, through

lines

19 and 20, and into

chambers

14 and 16, respectively. From these chambers the oil passes out from

lines

21 and 22, through check valves 41 and 42 and into common line 43. From line 43 the oil passes through valve 35 and through return line 44 to the reservoir 33. The pressure relief valve 45 connecting from

lines

37 and 38 to line 44 prevents the pressure within the above described circuit from rising above a predetermined low value of pressure.

' .Valve 35 is so constructed that it is normally springurged into the position shown in Fig, 4. However, when the time comes for a filled spool to be shifted, for spool changing purposes, into the position shown by Fig. 3, the opera-tor turns valve '35, through 90 into the position shown by Fig. 4a. With said valve 35 held in this Fig. 4 position, the flow of oil from pump 32 .(see Fig. 4) is through line 34 and valve 35, and thence, in opposite direction from its normal flow, into the line 43; from line 43 the oil passes in parallel through check valves 46 and 47, through flow control valves 48 and 49, through

pipes

19 and 20 and into the chambers 14 and 1'6, respectively. The flow control valves 48 and 49 are any of various adjustable metering or flow-regulating valves commonly usedin hydraulic systems, an example of which is the valve of Gardiner Patent No. 2,633,861, dated April 7, 1953.

With the valve 35 moved temporarily to the position shown in Fig. 4a, it is to be noted that the pumped oil cannot take its usual and normal passage through check valves 41 and 42 or

check valves

39 and 40 because these check valves would be pressure closed against this direction offlow. Since

lines

21 and 22 are filled withoil, the oil has no path of escape, and hence the pressure within the

chambers

14 and 16 will force the

pistons

3 and 4, respectively, to the left. Again, since the oil is incompressible, the amount that each cylinder will move will depend upon the quantity of oil passing through the valves 48 -and 49, rather than the pressure of this fluid. Therefore, the displacement of

pistons

3 and 4 will be positive, and, if the valves 48 and 49 are properly adjusted, the displacement of the two pistons will be equal. This establishes the separated condition between a filled spool 2 and the driving drum 1 which is illustrated in Fig. 3, permitting the filled spool to be removed from the bearing blocks 9, 10. Thereupon, when the valve 35 is released, it will spring back to the position shown. in Fig. 4, so as to restore the normal low pressure. circulation of oil through the

cylinder chambers

14 and 16; this allows a newly-positioned spool 23 .to be urged against the driving drum 1 by the pneumatic pressure efliective in the cylinder chambers 13 and 1-5.

As described above, I have combined the desirable features of the pneumatic holding system and a hydraulic separating means into a unique, relatively simple mechanism. Under normal winding conditions, the spool will be urged against its driving drum pneumatically with the same resiliency obtainable in conventional mechanisms used for the same general purpose. I-Iowever, on the separating portion of the operatingtcycle, my hydraulic circuit permits positive and equal displacement of the pistons, whicheffect was unobtainable' with the: pneumatic means of the prior art mechanisms. My invention has' been desc ibed w par cula r fe e ee 9 hen1b9fiment shown in the drawings but it should be understood that other changes, apart from those disclosed herein, may be made within the spirit of my invention.

1 claim:

1. In a paper winding machine, a driving drum journaled in a stationary support, a reel spool supported at its ends in a pair of slida'ble bearing blocks for sliding movement of said spool towards and away from said drum, a frame structure including a pair of.,hori zontal ways adapted to receive said bearing blocks for sliding movement therein, a pair of spaced hollow cylinders mounted along said ways in substantial alignment with said bearing blocks, a piston mounted within each cylinder intermediate the ends thereof, a piston rod connecting each piston with its corresponding bearing block, means for introducing pneumatic pressure into each cylinder on one side only of each piston was to urge said spool resiliently against said drum, means for circulating hydraulic fluid under low pressure through each cylinder on the other side of each'piston so as to keep the hollow portion of each cylinder on said other side of each piston full of hydraulic fluid at all times, and means for'sto'pping the circulation of said hydraulic fluid and for simultaneously introducing a measured quantity of said fluid into said hollow portions.

2. In a paper winding machine, a driving drum journaled in a stationary support, a reel spool supported at its ends in a pair of slidable bearing ,blocks for sliding movement of said spool towards and away from said drum, a frame structure including a pair or horizontal ways adapted to receive said bearing blocks for sliding movement therein, a pair of spaced hollow cylinders mounted along said way-s in substantial alignment with said bearing blocks, a p SIon mounted Within each .cylinder intermediate the ends thereof, each'piston dividing each cylinder into a pair of closed chambers on opposite sides of said piston, a piston rod connecting each piston with its corresponding. bearing block, means for introducing pneumatic pressure .into one chamber only of each cylinder so, as to urge said spool resiliently against said drum, means for circulating hydraulic fluid through the other chamber of each cylinder, and means for stopping the circulation of said hydraulic fluid and for simultaneously introducing a predetermined volume of said fluid into each of said other chambers.

3. In a paper winding machine, a driving drumjournaled in a stationary support, a freely rotatable reel.

spool supported at its ends for sliding movement towards and away from said drum, a pair of spaced hollow cylinders mounted adjacent the ends of said spool, a piston slidably mounted within each cylinder and forming with said cylinder a pair of closed chambers on opposite sides of said piston, means associated with each cylinder and piston for effectingv sliding movement of the adjacent spool end in accordance with the relative .slidingmcvement between said cylinder andpiston, means for introducing pneumatic pressure into one chamber only of each cylinder so as to urge said spool resiliently against said drum, means for circulating hydraulic fluid under low pressure through the other chamber of each cylinder so as to keep said other chambers full of hydraulic fluid at all times, and means for stopping the circulation of said hydraulic fluid and for simultaneously introducing a measured quantity of said fluid into each ofv said other chambers so as to urge said spool away from said: drum.

References Cited in the file of this patent I UNITED STATES PATENTS 2,176,198

Evans et a1. -Q. Mar. 8, 1955