Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3904147 A
Publication typeGrant
Publication dateSep 9, 1975
Filing dateAug 14, 1974
Priority dateAug 14, 1974
Publication numberUS 3904147 A, US 3904147A, US-A-3904147, US3904147 A, US3904147A
InventorsRalph L Ryan, Charles M Taitel
Original AssigneeCompensating Tension Controls
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Spring system assembly for tension compensating control device
US 3904147 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent [191 Taitel et al.

[ Sept. 9, 1975 [73] Assignee: Compensating Tension Controls,

lnc.. Orange NJ.

[22] Filed: Aug. 14, 1974 (21] Appl. No: 497,259

[52] US. Cl l. 242/1562; 242/7543 [51] lnt. Cl B6Sh 59/02 {58] Field of Search 242/1562. 156. 75.4 75.41.

[56] References Cited UNITED STATES PATENTS 1.671376 6/1928 Avery l l H 242/1562 1.733.834 10/1929 Steele 242/1562 2 l' 79 ()|1 3/1959 Nelson l 242/1562 3.139.243 6/1964 Warwick et al 242/1562 1377.036 4/1968 McNatt et a1 242/1562 FOREIGN PATENTS OR APPLICATIONS 780,164 7/1957 United Kingdom 242/1562 Primary E.\'aminerStanley N. Gilreath Allurney Agent, or Firm-Gerald Durstewitz [57] ABSTRACT A spring system assembly including a bracket having a threaded bore. A tube threaded on one end is screwed into the bore and has a flange 0n the other end. An overload compression spring is positioned between the bracket and a Washer engaging the flange. A rod, attached to the brake band of a tension compensating control device, extends through the tube. An annular member is mounted on the rod at the end of the tube and has an axially extending flange engaging the washer. The end of the rod is threaded and a Prony brake spring is positioned on the rod between the member and a nut threaded on the end of the rod.

3 Claims, 2 Drawing Figures SPRING SYSTEM ASSEMBLY FOR TENSION COMPENSATING CONTROL DEVICE BACKGROUND OF THE INVENTION The present invention relates to tension compensating control devices for supplying web or strand materials at constant tension. and, more particularly, to such devices which include a brake arrangement controlling the rotation of a supply roll and a tension sensing mechanism which actuates the brake arrangement to maintain uniform tension.

A control device of this type is disclosed in US. Pat. No. 3,139,243. The tension sensing mechanism includes two spaced rollers mounted on a spring biased rotatable plate. The web or strand extends from the supply roll around the two rollers in a Z-Iikc path and then to the utilizing agency. The tension in the web or strand acts against and balances the spring biasing the rotatable plate. Any variation in the tension in the web or strand causes the plate to rotate to a new position. The brake arrangement includes a brake band and a lever attached to one end of the brake band. A brake actuating cable extends from this lever to a pulley which is rigidly mounted to the rotatable plate of the tension sensing arrangement. As this plate rotates in response to a change in tension. the rotation of the pulley causes the brake band to be tightened or loosened to reestablish the desired tensionv The end of the brake band is attached to a spring system which prevents sudden and excessive forces from being applied by the brake band to the drum.

In the aforementioned patent, the spring system includes a lever pivoted on a stationary frame member. A shock-absorbing coil spring is attached between one end of this lever and the end of the brake band. A stronger overload spring is attached between the other end of the lever and a pin on the frame member to oppose the action of the first spring. This spring system, while useful in tension control devices providing low tension values. it does not readily lend itself to use in tension control devices operating at higher tension levels.

SUMMARY OF THE INVENTION Accordingly. it is an object of the present invention to provide an improved spring system for tension compensating control devices operating at high tension values.

Another object is to provide such a spring system which is easily adjustable.

Another object is to provide such a spring system which is compact and simple in construction.

The foregoing objects are accomplished by providing an overload compression spring captive between a bracket and a washer slideably mounted on a tube. a rod extending through the tube and connected to a brake band. an annular member mounted onto the rod to engage the washer. a nut on the end of the rod. and a prony brake spring captive between the nut and the annular member.

BRIEF DESCRIPTION OF THE DRAWINGS A preferred embodiment of the invention has been chosen for the purposes of illustration and description. and is shown in the accompanying drawings forming a part of the specification. wherein;

FIG. I is a schematic view of a tension compensating control device incorporating a spring system according to the present invention; and

FIG. 2 is a longitudinal sectional view of the spring system taken along the line 2-2 in FIGv I.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings in detail, and particularly to FIG. I thereof, there is shown a tension compensating control device including a brake section I and a control section I 1 both mounted on a frame plate 12.

The brake section includes a spindle l4 journalled to the frame plate by suitable bearings (not shown]. A roll of material 16 (such as web or strand) wound on a core 17 is mounted on the spindle l4 and rotates the spindle as the material is drawn from the rollv A brake drum I8 is mounted on the spindle I4 to rotate therewith and a brake band 19 engages the drum 17. One end of the brake band 19 is connected to a lever 20 which is mounted on a pulley 21. The pulley 21 is rotatably mounted on a shaft 22 extending from the frame plate 12. The other end of the brake band I9 is connected to a spring system assembly 24 according to the present invention The control section 11 includes a diamond-shaped plate 25 mounted on a shaft 26 which is journalled on the frame plate 12 by means of suitable bearings. A torsion spring 27 mounted within a casing 29 biases the plate 25 in a counter-clockwise direction. A pulley 30 is mounted on the end of the shaft 26 to rotate therewith as the plate 25 rotates. A cable 31 extends between the pulley 30 and the pulley 21. The ends of the cable are attached to the pulleys so that rotation of the pulley 30 in the counter-clockwise direction winds up the cable and causes a clockwise rotation of the pulley 21 and the lever 20 carried thereby. A pair of rollers 32 and 33 are journalled on the plate 25 and the material 16 is threaded around the rollers in a Z-shaped path so that the tension in the material I6 opposes the spring 27. A bumper 34 is mounted on the plate I2 to limit the motion of the plate 25.

The spring system assembly 24 includes an L-shaped bracket 35 bolted to the frame plate 12 and formed with a threaded bore 36. A tubular spring retainer 37 having threads on one end and an annular radial flange 38 on the other end is screwed into the bore. 36. A rod 39 extends axially through the retainer 37. One end of the rod is connected to the brake band 19 and the other end extends past the retainer 37 and is threaded. A lowrate compression spring 40 surrounds the retainer 37. A spring compressor member 41 having a hub 42 and an outer cylindrical flange 43 is positioned on the rod at the end of the retainer with the flange 43 extending over the flange 36. A flat washer 44 is positioned on the retainer 37. adjacent the flange 38, between the end of the spring 40 and the flange 43 of the member 4|. A high rate prony brake compression spring 45 surrounds the threaded end of the rod 39. One end of the spring 45 engages the member 4| and the other end engages a spring washer 46 held in position by a nut 47 threaded on the rod 39.

In operation. the tension in the material 16 tends to rotate the plate 25 in a clockwise direction while the spring 27 tends to rotate the plate in the counterclockwise direction. The nut 47 is positioned on the rod 39 so that when the tension in the material 16 is at the desired value, the spring 27 rotates the plate 25 into a position which produces a braking action on the roll to maintain the desired tension as the roll unwinds. If the tension in the material [6 begins to decrease, the plate is rotated counter-clockwise causing the pulley 30 to wind up the cable 31 and rotate the lever 20 clockwise to tighten the brake band 19. Conversely. an increase in tension in the material causes the plate 25 to rotate clockwise unwinding the cable 31 to loosen the brake band and allow the roll 15 to rotate more easily so as to decrease the tension in the material.

As the lever 20 pulls against the end of the brake band 19, the rod 39 moves and compresses the prony brake spring 45. When the material 16 experiences a sudden change in tension (for example, due to an acceleration or deceleration of the machine to which the material is being supplied). a sudden force is applied to the brake band. The Prony brake spring 45 compresses or extends in response to such sudden forces and thus allows the change in braking force to be applied to the brake drum smoothly thus decreasing any tendency for the control device to oscillate or hunt.

When the tension in the material 16 decreases excessively. the low-rate overload spring 40 prevents the brake band from suddenly locking up the brake drum. The spring 40 is preloaded to the desired overload setting by screwing the tube 37 into the bracket35. The loading on the high-rate spring increases rapidly as it is compressed by the motion of the rod 39. When the loading on the spring 45 reaches the overload setting value. further motion of the rod 39 compresses the overload spring 40. Since this spring has a low rate the loading thereon increases slowly as it compresses. Therefore. additional force applied by the brake band to the rod 39 compresses the spring 40 and sudden lock (Ill a 4 up of the brake is prevented.

It will be seen from the foregoing that the present invention provides an improved spring system assembly for tension compensating control devices which is capable of handling heavy loads and is compactly and simply constructed.

What is claimed is:

l. A spring system assembly for a tension compensating control device having a brake hand operated by a control unit connected to one end of the brake band to act against a brake drum carried by a spindle for a roll of material, said spring system assembly comprising a bracket secured to a frame member. a tube having one end secured to said bracket and having a radially extending flange on the other end, said tube being axially adjustable with respect to said bracket. a washer mounted on said tube, a low-rate overload compression spring on said tube acting against said bracket and normally urging said washer against said flange. a rod extending through said tube having a first end attached to the other end of the brake band and having a second end a stop member adjustably positioned on said second end. a spring compressing member slidably mounted on said rod and having an axial element positioned to contact said washer, and a high-rate Prony brake compression spring on said rod acting against said stop member and said spring compressing memher.

2. A spring system assembly according to claim I wherein said bracket is provided with a threaded bore said tube is threaded and screwed into said bore to adjust-ably prcload said overload spring 3. A spring system assembly according to claim 2 wherein said second end of said rod is threaded and said stop member includes a nut threaded on said rod.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1671976 *Apr 28, 1924Jun 5, 1928Western Electric CoStrand-tension-control mechanism
US1733834 *Nov 20, 1926Oct 29, 1929Gen ElectricTensioning device
US2879011 *Dec 9, 1955Mar 24, 1959Standard Machinery CompanyReel pay-out device of the tensioncontrolled type
US3139243 *Oct 11, 1962Jun 30, 1964Compensation Tension ControlsTension compensating control device
US3377036 *Apr 15, 1966Apr 9, 1968Anaconda Wire & Cable CoTensioning apparatus
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5176334 *Jun 4, 1991Jan 5, 1993Stahlkontor Maschinenabau GmbhApparatus for maintaining a tension in an elongated continuously advanced flexible element
US6050517 *Sep 22, 1998Apr 18, 2000Curt G. JoaCounterbalanced web accumulator
US6059710 *Dec 24, 1998May 9, 2000Kimberly-Clark Worldwide, Inc.Process for cutting of discrete components of a multi-component workpiece and depositing them with registration on a moving web of material
US6074333 *Dec 24, 1998Jun 13, 2000Kimberly-Clark Worldwide, Inc.Machine for cutting discrete components of a multi-component workpiece and depositing them with registration on a moving web of material
US6165306 *Jun 1, 1998Dec 26, 2000Kimberly-Clark Worldwide, Inc.Process and apparatus for cutting of discrete components of a multi-component workpiece and depositing them with registration on a moving web of material
US6435445 *Jun 27, 2000Aug 20, 2002Rjs CorporationSelf-compensating filament tension control device employing a friction band
US6520236Sep 25, 2000Feb 18, 2003Kimberly-Clark Worldwide, Inc.Process and apparatus for cutting of discrete components of a multi-component workpiece and depositing them with registration on a moving web of material
US6527902Sep 25, 2000Mar 4, 2003Kimberly-Clark Worldwide, Inc.Process and apparatus for cutting of discrete components of a multi-component workpiece and depositing them with registration on a moving web of material
US7303708Apr 8, 2005Dec 4, 2007Curt G. Joa, Inc.Super absorbent distribution system design for homogeneous distribution throughout an absorbent core
US7374627Apr 7, 2005May 20, 2008Curt G. Joa, Inc.Method of producing an ultrasonically bonded lap seam
US7398870Oct 5, 2005Jul 15, 2008Curt G. Joa, IncArticle transfer and placement apparatus
US7543773Dec 30, 2005Jun 9, 2009Avery Dennison CorporationDancer arm for constant tension
US7703599Apr 12, 2005Apr 27, 2010Curt G. Joa, Inc.Method and apparatus for reversing direction of an article
US7708849Jan 4, 2006May 4, 2010Curt G. Joa, Inc.Apparatus and method for cutting elastic strands between layers of carrier webs
US7770712Feb 17, 2006Aug 10, 2010Curt G. Joa, Inc.Article transfer and placement apparatus with active puck
US7780052May 18, 2006Aug 24, 2010Curt G. Joa, Inc.Trim removal system
US7811403May 7, 2007Oct 12, 2010Curt G. Joa, Inc.Transverse tab application method and apparatus
US7861756May 8, 2007Jan 4, 2011Curt G. Joa, Inc.Staggered cutting knife
US7909956Aug 13, 2009Mar 22, 2011Curt G. Joa, Inc.Method of producing a pants-type diaper
US7975584Feb 21, 2008Jul 12, 2011Curt G. Joa, Inc.Single transfer insert placement method and apparatus
US8007484Apr 1, 2005Aug 30, 2011Curt G. Joa, Inc.Pants type product and method of making the same
US8016972May 8, 2008Sep 13, 2011Curt G. Joa, Inc.Methods and apparatus for application of nested zero waste ear to traveling web
US8172977Apr 5, 2010May 8, 2012Curt G. Joa, Inc.Methods and apparatus for application of nested zero waste ear to traveling web
US8182624Mar 11, 2009May 22, 2012Curt G. Joa, Inc.Registered stretch laminate and methods for forming a registered stretch laminate
US8293056Aug 24, 2010Oct 23, 2012Curt G. Joa, Inc.Trim removal system
US8398793Jul 20, 2007Mar 19, 2013Curt G. Joa, Inc.Apparatus and method for minimizing waste and improving quality and production in web processing operations
US8417374Apr 26, 2010Apr 9, 2013Curt G. Joa, Inc.Method and apparatus for changing speed or direction of an article
US8460495Dec 27, 2010Jun 11, 2013Curt G. Joa, Inc.Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article
US8557077Mar 21, 2011Oct 15, 2013Curt G. Joa, Inc.Method of producing a pants-type diaper
US8656817Mar 7, 2012Feb 25, 2014Curt G. JoaMulti-profile die cutting assembly
US8663411Jun 6, 2011Mar 4, 2014Curt G. Joa, Inc.Apparatus and method for forming a pant-type diaper with refastenable side seams
US8673098Oct 25, 2010Mar 18, 2014Curt G. Joa, Inc.Method and apparatus for stretching segmented stretchable film and application of the segmented film to a moving web
US8794115Jul 7, 2011Aug 5, 2014Curt G. Joa, Inc.Single transfer insert placement method and apparatus
US8820380Mar 29, 2012Sep 2, 2014Curt G. Joa, Inc.Differential speed shafted machines and uses therefor, including discontinuous and continuous side by side bonding
US9089453Jun 11, 2013Jul 28, 2015Curt G. Joa, Inc.Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article
US20070074953 *Oct 5, 2005Apr 5, 2007Curt G. Joa, Inc.Article transfer and placement apparatus
US20070131814 *Dec 30, 2005Jun 14, 2007Johannes LenklDancer arm for constant tension
USD684613Apr 14, 2011Jun 18, 2013Curt G. Joa, Inc.Sliding guard structure
USD703247Aug 23, 2013Apr 22, 2014Curt G. Joa, Inc.Ventilated vacuum commutation structure
USD703248Aug 23, 2013Apr 22, 2014Curt G. Joa, Inc.Ventilated vacuum commutation structure
USD703711Aug 23, 2013Apr 29, 2014Curt G. Joa, Inc.Ventilated vacuum communication structure
USD703712Aug 23, 2013Apr 29, 2014Curt G. Joa, Inc.Ventilated vacuum commutation structure
USD704237Aug 23, 2013May 6, 2014Curt G. Joa, Inc.Ventilated vacuum commutation structure
USRE31015 *Sep 22, 1980Aug 24, 1982Bedford Industries, Inc.Reel adapter for tie material and method of using same
DE102008033581A1 *Jul 17, 2008Feb 11, 2010Wolfgang EmmerichCoil carrier for braiding machines, bobbin machines and stranding machines, has movably mounted, preloaded guide element, stretched with help of winding material and partially elastically deformable control element
DE102008033581B4 *Jul 17, 2008Jul 29, 2010Wolfgang EmmerichSpulenträger für konstante Wickelgutspannung
WO2006099859A1 *Mar 22, 2006Sep 28, 2006Wardwell Europ GmbhBobbin carrier for braided material with reduced diameter
WO2007065710A1 *Dec 8, 2006Jun 14, 2007Avery Dennison CorpDancer arm for constant tensile stressing
Classifications
U.S. Classification242/156.2, 242/421.8, 242/422.8
International ClassificationB65H59/04
Cooperative ClassificationB65H59/04, B65H2701/31
European ClassificationB65H59/04