US2272140A - Tension controlling mechanism - Google Patents

Description

\ v Feb. 3, 1942. P. TOLLISON ETAL 2,272,140

I TENSION CONTROLLING MECHANISM 4 Filed April 22; 1939 4 Sheets-Sheet l Feb. 3, 1942. P. TOLLISON Ig'AL 2,272,140

TENS ION CONTROLLING MECHA NISM I Filed April 22, 1939 4 Sheets-Sheet 2 Feb. 3, 1942. P. TOL LISON r/u. 2,272,140

TENSION CONTROLLING MECHANISM Filed April 22, 1959 4 ShetS-Sheet 3 Feb. 3, 1942.

P. TOLLISON ETAL TENSION CONTROLLING MECHANISM Filed April 22; 1959 .EeZ W060i" Cored/01222726 O 4 Sheets-Sheet 4 .Ezce. I

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Zvw/ewS.Ca re Patented Feb. 3, 1942 mm l j TENSION CONTROLLING; MECHANISM Paul'L. Tollison, North PlainfieldQN; 1., gm,

Charles S. Cafirey, Port Washington, N.

assignors to Wood Newspaper Machinery Cor poration, l lainfield, N. a corporation of,

Virginia Application April 22. 19aa'seriarrra26asso.

2' Claims. 101124245) I This invention is particularly adapted for controlling the tension of a printingweb' which is being fed to a printing press.

The principal objects of the invention are to I provide an efilcient means for maintaining a con-v stant web tensionwhen the running roll is moved The rotation of sprocket wheel l6 secured thereon to move a;

" .chainll and-consequently turn a sprocket l8 into the tension belts or any other'means pro videdj for controlling the tension 'of the 'web; to I provide a device of this character which'will compensate for the various tensions and regulate] the tension inaccordance therewith but keep the tension substantially constant, and to conte'mplate compensation for web tension changes cre-= atedby themotion of the roll handling mechanism regardless of the type of 'roll carrier or character of-tensioning means employed. The application of the invention is not limited which "is-secured to a hub 20.] The hub'20fis loosely mounted on a shaft l9 and. has a clutch p1ate" {2j|' -fasteneduto it. Rotation of the reel" shaft 2', therefor -icauses the clutch plate 2| A magnetic body 22 and sprocket wheel 23a'resecurelyfastened. to the shaft-I9. The

energizingfof. the clutch body 22 will cause it to becomeTerigagedawithflthe clutch plate Zlyand complete magnetic and mechanicalconnection from'the reel shaft 2 to' the sprocket wheel 23,

resulting in-sa tend'encyitdrotat'e said sprocket wheel',gdepending upon thestrength of the mag-i netic clutch 22*whenever the reel shaft 2is-roto the particular type of newspaper feeding de-f vices shown in the drawings :in which the tension belts are in a position toengage the feeding web:-

roll and toward which that roll is moved. during the feeding operation. The manner .of'applying the tension depends'of course, on'whether. the:

tension control is mechanical, electrical or fluid 1 pressure. g

Other objects and advantages of the'inventi'on' will appear hereinafter.

Reference is to be had to'the accompanying drawings, in which Fig. l is an end'view showingthe parts for regulating the tension of the web;

Fig: 2 is a side view of a tension regulating In. Fig; 1 a reel stand I rotatably mounts .a reel" shaft 2- to which end spiders 3 are secured. Said;

spiders support the expiring web roll 4 and the new roll 5.

around ay'bending roller 8, tension roller- 9, and bending rollers 10 and" II into the press. Rollers The web 6 from the roll 4 passes 8, I0 and, II have a fixed position and tension roller'llismovable. v

'Iension'belts I are anchored at theirlower end and are arranged in'such manner that they will contact the paper rolls as shown in Fig. 1. The

belt is then continued over pulleys l2, I3and l4 and is secured at its end by a tension belt anchor I5. The pulley I4 is movable.

tilt

I 31 intoxoperation; The solenoid 33 close'sjcontacty v 34' which completes the direct current circuit thro'ugh'the': tensionfiweightlifting. clutch 22,- A I ta'ted and theclutch 221s energized. vrne energizing: o'f theclutch 22 is best'illus-- tratedrby' the wiring diagram 'of Fig.5. Thede-r ressingsor button :24on1the controlpanel will Q complete 'a flcircuit through '25 forward operating solenoid 2 6.

and 28, to the 'Ifheline '25 is connected 1 to the reel panel where it? may be tracedto a forward operating solenoid 26 whose other side is'Z'I, then continues into an overload relay where it mainfline L2.

becomes 49, then-through to the The *line' 28; on the opposite side iswired 'to'the p'anel where it may be traced-dig ,rectly to the line-Ls;

A solenoid 33 is connected in' parallel with the solenoid '26'bya wire 21. Line 25 will be the v opposite side of thev solenoid 33. In this mannerthesolenoids 33 and 26 will be energized' 'at the same timez' The solenoid126 controls. the forward contactors. and, when closedysets motor 4m rheostat 36* connected into the. lineimaybeused to regulate the voltage passing through the clutch 22'. A limit switch 35=isp1aced in the circuit; 3

; It'istherefore"evident-that, forwardrotation I i of'tlie r'eelan'd clutch-excitation at the same time will cause the i sprocket wheel 23 to irevolve.

v An autopaster attached to a reel will have oer- I i V tain' electrical -controls addedjto move the reel I forward automatically aftera'splice has been 7 completed; Means, not shown on the wiring diagram,fwould energize the solenoid 26 and consequentlyfthesolenoid 33 at fa predetermined posig tion-in the pastingcycle; Theresult would bethe I a the reel and the excitation v I forward: rotation of of the clutch 22, a

the re l;- shaft ,2' auras a A tension Weightli-releasabljr 'secured tolranl arm, on a shaft 4!, urges said shaft to turn in a counter clockwise manner, carrying with it a lever 43. To the hub of the lever 43 is attached a sprocket 40 connected to the sprocket 23 by the chain 11. A stud 44 mounted in the outer end, of the lever 43 supports one end of a connecting link 45. The other end of said link is attached to a shaft 49, carried in a lever 46, by a stud 41 in such manner that it will allow the lever 46 to oscillate about a stud 43 which is secured in the machine frame.

A shaft 49 and poppet 50, supported thereby, are mounted in the outer end of the lever 46. The shaft 49 carries the roller l4 which is held in location by guide collars 5| and 52. The shaft 49 carries one end of a spring rod 53 whose shank passes through a poppet 54 located in an anchor shaft bracket 55. A spring 56, carried on the rod 53, is held in compression against said poppet by an adjusting collar 5'lfastened on the rod 53 and will take up any lost motion when said rod is moved through the poppet 54.

The poppet 50 carries the shank of a spring rod 58 which is secured to the tension roll lever 59 by a stud 60. A spring 6| held against the poppet 59 by a collar 62 urges the tension roll lever 59 to turn in a counter-clockwise manner about a shaft 63. The web 6, which turns around the roll 9 that is carried at the outer end of the lever 59, produces a pull on said roll in opposition to the action of the spring 5!. Slight variations in web tension will be compensated by the above spring.

The tension belt I that passes around the roller I4 is held by the anchor I5 to the anchor lever 94 by means of the poppet 65 and is adjustable in said poppet by check-nuts 66 and 51. The lever 64 is pinned to a shaft 58 that is rotatably mounted in a bracket 55, and a pin 69, fixed in said bracket. This limits the shaft rotation by its cooperation with a slot 10 machined in a lever,

side of the slot 10 comes against the pin 59 and stops further motion of the belt anchors. This same rotation will carry a spring pin 12 against the pin 69 and will compress a spring 13 carried in a hole 74, which is made for that purpose in the lever H Slack in the tension belts will cause the spring 13 to turn the anchor lever 64 and consequently the lever H in a clockwise direction until again stopped by the pin 69. This motion will carry a set screw 15 held in the end of the lever H to move against a roller 16 in the limit switch 35 and open the circuit therein.

It is now evident that rotation of the reels into the belts 1 will produce the following action:

The excitation of the reel motor for forward motion will also energize the clutch 22 and establish a connection between the reel shaft 2 and the sprocket 23.

The sprocket 23 is connected to the weight lifting mechanism by the chain 11 and will tend to move the weights in a clockwise manner when the reel moves forward. This will move all tension parts to the right and decrease the tension on the paper rolls. If too much weight is relieved, allowing too much slack, the spring 72 will function and rotate the lever H and the set screw 15 against the roller 16 of the limit switch 35 and will interrupt the direct current circuit to the magnetic clutch 22 thereby deenergizing this unit and allowing the tension weights to function in a normal manner. Movement of the set screw 15 upwardly will-release the roller 16, causing the limit switch 35 to close the circuit. The rheostat 36 can be adjusted to allow less torque than is required for the weights to be raised to produce the proper degree of tension so that limit switch 35 may remain closed at all times. Used in that manner the switch 35 merely becomes a safety.

When using half rolls it is customary to reduce the number of tension weights and under this condition the web 6 may exert sufficient pull to raise the tension roll 9 upward beyond its normal position assumed when operating with a full roll. Additional web strain may cause the half roll to overcome the efforts of the tension weights and the paper may run loose, because the tension weights would be using up part of their force in returning the tension roller to the proper position.

The spring 56, which was previously described, will now function to counteract the additional burden placed on the tension weight by. the overbalancing of the roller 9 and will cause the tension parts to resume their normal position.

That a suitable and efficient means for controlling paper tension when rotation of the reel is necessary is now obvious. This device will compensate for various conditions and regulate the tension accordingly. The scope of this invention is not limited to the particular form shown but contemplates compensation for web tension changes created by the motion of roll handling mechanisms regardless of the type ofroll carrier or character of tensioning means employed.

Having thus described our invention and the advantages thereof, we do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what we claim is:

1. The combination with means for supporting a web supply roll, means for feeding the web from said roll'to a press, or the like, and tension belts for engaging the web on said roll, of a web tension weight, a magnetic clutch adapted to be clutched with respect to the weight when the magnet is energized, means cooperating with the .clutch for turning it on its axis, a wheel adapted to turn with the weight when the clutch is in operative condition, said weight being connected to the axis of said wheel and depending at an angle to the vertical and mechanical means for turning the wheel to vary the tension.

2. The combination with means for support-' ing a web supply roll, and tension belts for engaging the web on said roll, of a web tension weight, a magnetic clutch adapted to be clutched with respect to the Weight when energized, means cooperating with the clutch for turning it on its PAUL L. TOLLISON.

CHAS. S. CAFFREY.

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