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Propulsion mechanism for conveyers

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Publication number
US2167179A
US2167179A US22662538A US2167179A US 2167179 A US2167179 A US 2167179A US 22662538 A US22662538 A US 22662538A US 2167179 A US2167179 A US 2167179A
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Prior art keywords
pressure
device
gauze
conveyer
blocks
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Curt G Joa
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Joa Curt G Inc
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Joa Curt G Inc
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING; SHOP CONVEYOR SYSTEMS; PNEUMATIC TUBE CONVEYORS
    • B65G37/00Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING; SHOP CONVEYOR SYSTEMS; PNEUMATIC TUBE CONVEYORS
    • B65G2812/00Indexing codes relating to the kind or type of conveyors
    • B65G2812/01Conveyors composed of several types of conveyors
    • B65G2812/016Conveyors composed of several types of conveyors for conveying material by co-operating units in tandem
    • B65G2812/018Conveyors composed of several types of conveyors for conveying material by co-operating units in tandem between conveyor sections

Description

Patented July 2s, 1939 UNITED STATES PROPULSION MECHANISM FOR CONVEYEBS Curt G. Joa, Sheboygan Falls, Wis., assignor to Curt G. Joa, Inc., Manitowoc, Wis., a corporation of Wisconsin Application August 25, 1938, Serial No. 226,625

9 Claims.

This invention relates to improvements in propulsion mechanism for conveyers. More particularly stated, the invention relates to a device for `pulling a web of gauze or the like in which objects may be enfolded.

The invention is of particular utility in the manufacture of sanitary napkins. The present application is a continuation in part of my application 54,669, filed Dec. 16, 1935 which has matured into Patent No. 2,131,808, Oct. 4, 1938, and relating to a sanitary napkin machine.

The object of the invention is to provide means whereby a web may be pulled uniformly in a straight line Without slippage and without damage to a soft pa'd or other object which may be enfolded in the web. Other objects will appear from the following disclosure.

In the drawings:

Figure 1 is a view in side elevation of a, propulsion device and cut-off mechanism as used in a sanitary napkin machine and representing one embodiment of this invention.

Figure 2 isa plan view of the structure shown in Fig. 1.

Figure 3 is a view partially in plan and partially in section showing a modified embodiment of my invention particularly adapted for use where the tension to be exerted by the propulsion device is very great.

Figure 4 is a view taken in section on the line 4 4 in Fig. 3.

Figure 5 is a view taken in section on the line 5-5 in Fig. 3.

Figure 6 is a fragmentary detail view in perspective of one of the pressure blocks used in the device illustrated.

Figure '7 is a fragmentary detail view in perspective of one of 'the mounting plates used to apply pressure in the device shown in Fig. 3.

ALike parts are represented by the same refer-- ence characters throughout the several views.

In sanitary napkin machines and in other devices where a web of gauze or other material has to be pulled for a considerable distance through the mechanism, the propulsion device which does the pulling must be capable of developingvery substantial tension. where the propulsion device operates in synchronism with a cut-off mechanism so that any slippage which may occur between the propulsion device and the web will result in displacing the cut from its desired location in the web. Yet it is also necessary to avoid putting pressure on the web at points where relatively soft pads or This is particularly true A other articles may be enfolded therein and may, perhaps, be damaged by undue pressure.

In the device herein disclosed, a continuous web 8 of gauze in which at spaced intervals pads 9 are enfolded is shown, by way of example, as the type of web for the propulsion of which my improved mechanism is well adapted.` 'I'he web of gauze, between the enfolded pad, is subjected to the pressure of opposed pressure surfaces of a pair of lconveyers I and II. In the device shown in Figures l and 2, the conveyor I I constitutes an endless belt operating over pulleys I2 and I3 and supported on a conveyer table I4 at the point where pressure engagement of the gauze occurs.

The conveyer I0 comprises a pair of spaced chains I and I6, corresponding links of which are connected by pressure blocks I1 arranged in series to constitute mutually spaced flexible pressure pads. As shown in Figure 1, this arrangement readily permits the blocks to pass about the sprockets I8 and I9 while maintaining them in closely adjacent positions throughout the series when engaged with the gauze.

The number of pressure vblocks employed is such that the length of each flexible padwill correspond substantially exactly to the spacing between the absorbent pads 9 which are enfolded in the gauze web 8. Thus each of the pressure pads I1 of the conveyer will engage only the unfilled portion of the gauze, clamping the flat portion of. the gauze web tightly to the underlying belt II. To the extent that the belt II is relatively soft, the individual blocks Il will tend to slightly embed themselves in the belt and the tension which can be exerted by the device may be increased If the distance between successive absorbent pads 9 is increased or decreased, a different conveyer I0 will be substituted to have the correct number of pressure blocks to fit the space between the pads. Thus all pressure on the absorbent pads will be avoided and yet a very substantial tension will be rectilinearly exerted upon the gauze to pull it through the mechanism toward the cut-off knife 2,0 and its co-acting stationary shear 2|. l

In the device shown in Figures 3 to 7 the gauze web 8 and the enfolded pads 9 are preferably on edge instead of being horizontally disposed. This fact, and the desire to exert an even greater tension on the gauze led to the development of the special design here illustrated.

At one side of the path of the gauze, I provide upper and lower sprockets at 28 and 2l.

Attheothersideofthepatiioftliega,

I provide upper and lower sprockets 30 and 8|.

v'I'heehainll which operates oversprocketll hasitslinhconnected by pintlesll whichare extendedtoses'vealsoaspintlesfortheoonnectionofthelinksofchainll,whichoperates over lthe lower sprocket 2l. Similarly, the chain Il which operates over upper sprocket Il has its links connected by pintles which are extended at to serve also the linksof the chain l1 which. operate over the lower sprocket Il.

` Upon the pintles Il and It between the respective upper and lower chains are mounted the pressure blocks 3l and one of which is shown sepablock I. carried by the other set of chains at the other side of the gauze path. 'I'hus when the gauze is engaged between the blocks'of al- -ternating sizes, the gauze is corrugated or convoluted in such a way that the slippage thereof between the pressure blocks is virtually impossible. Therefore, a great deal of tension or pully can be exerted by the device provided the blocks are held in nrm pressure engagement upon the gauze. i

' Such'engagement is assured bythe pressure bars l. which are flexibly jointed and resiliently supported by the compression springs 4i at each joint. The bars are mounted in slots 42 of upstanding guide members 43 disposed at each side of the path of the gauze. Sockets at M in guide members Il receive the compression springs 4i. 'Ihe links of the respective chains ride on the marginal surfaces' of the jointed bars 40, thus receiving'the pressure of `springs l4i and transmitting such pressure through the pressure blocks to the gauze.

In this device the sets of pressure blocks on one conveyer system register exactly with the sets of pressure blocks on the other conveyer system to engage only that portionl of the gauze which is intermediate the enfolded pads s. Therefore.' when the.pads pass through the propulsive mechanism, they are entirely free of lateral pressure as clearly indicated in Figure 5.

It will, of course, be understood that in each instance means is provided for positively driving the propulsion conveyers `as desired. 'I'he driving connections are fragmentarily illustrated in Figures 1 and 4 but4 inasmuch as they may be varied as desired and constitute no part of the present invention, they are not described in detailhere.

I claim:v

1. A propulsion device of the charactery described comprising a conveyer and spaced series of pressure blocks mounted thereon, together k with co-acting means toward which the pressure of said yblocks is directed whereby said blocks are adapted to engage to work under pressure against vsaid means for the propulsion of such work.

2. A device of the character described comprisingv the combination with an endless conveyer and opposed co-acting pressure receiving means, of guide members encircled by said conveyer Vand series of pressure blocks mounted at intervals upon the conveyer, said blocks extending transversely thereof and being in close proxnected with its respective aiemvo imity within the series and widely spaced between the series.

3.Adevice ofthecharactervdescribedcomprising spaced chains comprising links, guide sprockets for the respective chains, versely extending pressure blocks arranged in spaced series andtransversely connecting corresponding portions of the respective chains.

4. In a device of combination of a lpair of propulsion conveyers having proximate night portions spaced to ,receive without pressure portions of an intervening web which will not withstand m at least one of said conveyers being provided at of nexible Dads prof spaced intervals with series jecting therefrom toward the other of said conveyers for the pressureengagement of work bethecharacterdescribed,tlie

tween the conveyers, said Vpads being close .to l

each other in a given series and said series being comparatively widely spaced from each other.

5. A device of the character described comprising the combination'with a pair of conveyers having proximate nights, one of said Yconveyers comprising a belt and the other of said convey- `ers comprising a chain, of nexible pressure pads in mutually spaced relation on the chain conveyer and projecting therefrom in a direction to press work toward the belt conveyer in trav l versing the proximate nights of the respective conveyers, each of said pads on .the chain conveyer comprising a series of blocks mounted on successive links of said conveyer.

6. In a device of the character described they combination of a pair of conveyers having proxi- 'mate nights of pressure, pads spaced on the respective conveyers to register in traversing said proximate nights, said conveyers being materially spaced atsaid proximate nights between said pads and said pads having relatively greatly and less greatly projecting portions with the greatly projecting portion of the pads of one conveyer in registry with the less greatly projecting portion of the pad' of the opposing conveyer whereby to convolute between said pads the work engaged thereby between said nights.

'1. In a'device of the character described,the combination with spaced mounting members, of conveyers including nights operable in close proximity between said members, flexibly jointed rail means mounted on one of said members and arranged in operative supporting relation to one of said conveyer nights, said mounting member having spring means for the pressure support of said rail means. 8. In a device ofthe. character described, the combination with a. support provided with spaced slots, of nexibly jointed rail means mounted in the respective slots, a compression spring mountv ed upon the support' in pressure engagement with said rail means and a conveyer including spaced chains riding on the respective rail means to receive resilient support therefrom.

9. In a device of the character described, the

combination with a support provided with spaced slots, of nexibly jointed rail means mounted in the respective "slots, a compression spring mounted upon the support in pressure engagement with said rail means, and a conveyer including spaced chains riding on the respective rail means to receive resilient support therefrom, said conveyer including chains and extending transversely therebetween. i

CURT G. JOA.'y

pressure blocks con-

US2167179A 1938-08-25 1938-08-25 Propulsion mechanism for conveyers Expired - Lifetime US2167179A (en)

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Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496080A (en) * 1945-09-26 1950-01-31 Bertram H Wimer Sheet dispensing device for carbon paper rolls
US2862605A (en) * 1953-07-01 1958-12-02 Doughboy Ind Inc Conveyor chain
US2896943A (en) * 1958-01-30 1959-07-28 Lewi William Continuous automatic clamping device
US3129442A (en) * 1959-07-14 1964-04-21 Bradford Dyers Ass Ltd Stencil printing of thick fabrics
FR2618422A1 (en) * 1987-07-20 1989-01-27 Simon Francois Device for pulling on a flat flexible tie for haulage, lifting or similar work
US7303708B2 (en) 2004-04-19 2007-12-04 Curt G. Joa, Inc. Super absorbent distribution system design for homogeneous distribution throughout an absorbent core
US7374627B2 (en) 2004-04-19 2008-05-20 Curt G. Joa, Inc. Method of producing an ultrasonically bonded lap seam
US7398870B2 (en) 2005-10-05 2008-07-15 Curt G. Joa, Inc Article transfer and placement apparatus
US7452436B2 (en) 2005-03-09 2008-11-18 Curt G. Joa, Inc. Transverse tape application method and apparatus
US7533709B2 (en) 2005-05-31 2009-05-19 Curt G. Joa, Inc. High speed vacuum porting
US7537215B2 (en) 2004-06-15 2009-05-26 Curt G. Joa, Inc. Method and apparatus for securing stretchable film using vacuum
US7618513B2 (en) 2005-05-31 2009-11-17 Curt G. Joa, Inc. Web stabilization on a slip and cut applicator
US7638014B2 (en) 2004-05-21 2009-12-29 Curt G. Joa, Inc. Method of producing a pants-type diaper
US7640962B2 (en) 2004-04-20 2010-01-05 Curt G. Joa, Inc. Multiple tape application method and apparatus
US7703599B2 (en) 2004-04-19 2010-04-27 Curt G. Joa, Inc. Method and apparatus for reversing direction of an article
US7708849B2 (en) 2004-04-20 2010-05-04 Curt G. Joa, Inc. Apparatus and method for cutting elastic strands between layers of carrier webs
US7770712B2 (en) 2006-02-17 2010-08-10 Curt G. Joa, Inc. Article transfer and placement apparatus with active puck
US7780052B2 (en) 2006-05-18 2010-08-24 Curt G. Joa, Inc. Trim removal system
US7811403B2 (en) 2005-03-09 2010-10-12 Curt G. Joa, Inc. Transverse tab application method and apparatus
US7861756B2 (en) 2004-04-20 2011-01-04 Curt G. Joa, Inc. Staggered cutting knife
US7975584B2 (en) 2007-02-21 2011-07-12 Curt G. Joa, Inc. Single transfer insert placement method and apparatus
US8007484B2 (en) 2005-04-01 2011-08-30 Curt G. Joa, Inc. Pants type product and method of making the same
US8016972B2 (en) 2007-05-09 2011-09-13 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US8172977B2 (en) 2009-04-06 2012-05-08 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US8182624B2 (en) 2008-03-12 2012-05-22 Curt G. Joa, Inc. Registered stretch laminate and methods for forming a registered stretch laminate
US8398793B2 (en) 2007-07-20 2013-03-19 Curt G. Joa, Inc. Apparatus and method for minimizing waste and improving quality and production in web processing operations
US8417374B2 (en) 2004-04-19 2013-04-09 Curt G. Joa, Inc. Method and apparatus for changing speed or direction of an article
US8460495B2 (en) 2009-12-30 2013-06-11 Curt G. Joa, Inc. Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article
USD684613S1 (en) 2011-04-14 2013-06-18 Curt G. Joa, Inc. Sliding guard structure
US8656817B2 (en) 2011-03-09 2014-02-25 Curt G. Joa Multi-profile die cutting assembly
US8663411B2 (en) 2010-06-07 2014-03-04 Curt G. Joa, Inc. Apparatus and method for forming a pant-type diaper with refastenable side seams
US8673098B2 (en) 2009-10-28 2014-03-18 Curt G. Joa, Inc. Method and apparatus for stretching segmented stretchable film and application of the segmented film to a moving web
USD703248S1 (en) 2013-08-23 2014-04-22 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD703247S1 (en) 2013-08-23 2014-04-22 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD703711S1 (en) 2013-08-23 2014-04-29 Curt G. Joa, Inc. Ventilated vacuum communication structure
USD703712S1 (en) 2013-08-23 2014-04-29 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD704237S1 (en) 2013-08-23 2014-05-06 Curt G. Joa, Inc. Ventilated vacuum commutation structure
US8820380B2 (en) 2011-07-21 2014-09-02 Curt G. Joa, Inc. Differential speed shafted machines and uses therefor, including discontinuous and continuous side by side bonding
US9089453B2 (en) 2009-12-30 2015-07-28 Curt G. Joa, Inc. Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article
US9283683B2 (en) 2013-07-24 2016-03-15 Curt G. Joa, Inc. Ventilated vacuum commutation structures
US9289329B1 (en) 2013-12-05 2016-03-22 Curt G. Joa, Inc. Method for producing pant type diapers
US9387131B2 (en) 2007-07-20 2016-07-12 Curt G. Joa, Inc. Apparatus and method for minimizing waste and improving quality and production in web processing operations by automated threading and re-threading of web materials
US9433538B2 (en) 2006-05-18 2016-09-06 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web and formation of articles using a dual cut slip unit
US9550306B2 (en) 2007-02-21 2017-01-24 Curt G. Joa, Inc. Single transfer insert placement and apparatus with cross-direction insert placement control
US9566193B2 (en) 2011-02-25 2017-02-14 Curt G. Joa, Inc. Methods and apparatus for forming disposable products at high speeds with small machine footprint
US9603752B2 (en) 2010-08-05 2017-03-28 Curt G. Joa, Inc. Apparatus and method for minimizing waste and improving quality and production in web processing operations by automatic cuff defect correction
US9622918B2 (en) 2006-05-18 2017-04-18 Curt G. Joe, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US9809414B2 (en) 2012-04-24 2017-11-07 Curt G. Joa, Inc. Elastic break brake apparatus and method for minimizing broken elastic rethreading

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496080A (en) * 1945-09-26 1950-01-31 Bertram H Wimer Sheet dispensing device for carbon paper rolls
US2862605A (en) * 1953-07-01 1958-12-02 Doughboy Ind Inc Conveyor chain
US2896943A (en) * 1958-01-30 1959-07-28 Lewi William Continuous automatic clamping device
US3129442A (en) * 1959-07-14 1964-04-21 Bradford Dyers Ass Ltd Stencil printing of thick fabrics
FR2618422A1 (en) * 1987-07-20 1989-01-27 Simon Francois Device for pulling on a flat flexible tie for haulage, lifting or similar work
US7303708B2 (en) 2004-04-19 2007-12-04 Curt G. Joa, Inc. Super absorbent distribution system design for homogeneous distribution throughout an absorbent core
US7374627B2 (en) 2004-04-19 2008-05-20 Curt G. Joa, Inc. Method of producing an ultrasonically bonded lap seam
US7703599B2 (en) 2004-04-19 2010-04-27 Curt G. Joa, Inc. Method and apparatus for reversing direction of an article
US8417374B2 (en) 2004-04-19 2013-04-09 Curt G. Joa, Inc. Method and apparatus for changing speed or direction of an article
US7708849B2 (en) 2004-04-20 2010-05-04 Curt G. Joa, Inc. Apparatus and method for cutting elastic strands between layers of carrier webs
US7640962B2 (en) 2004-04-20 2010-01-05 Curt G. Joa, Inc. Multiple tape application method and apparatus
US7861756B2 (en) 2004-04-20 2011-01-04 Curt G. Joa, Inc. Staggered cutting knife
US7638014B2 (en) 2004-05-21 2009-12-29 Curt G. Joa, Inc. Method of producing a pants-type diaper
US8557077B2 (en) 2004-05-21 2013-10-15 Curt G. Joa, Inc. Method of producing a pants-type diaper
US7909956B2 (en) 2004-05-21 2011-03-22 Curt G. Joa, Inc. Method of producing a pants-type diaper
US7537215B2 (en) 2004-06-15 2009-05-26 Curt G. Joa, Inc. Method and apparatus for securing stretchable film using vacuum
US7811403B2 (en) 2005-03-09 2010-10-12 Curt G. Joa, Inc. Transverse tab application method and apparatus
US7452436B2 (en) 2005-03-09 2008-11-18 Curt G. Joa, Inc. Transverse tape application method and apparatus
US8007484B2 (en) 2005-04-01 2011-08-30 Curt G. Joa, Inc. Pants type product and method of making the same
US7618513B2 (en) 2005-05-31 2009-11-17 Curt G. Joa, Inc. Web stabilization on a slip and cut applicator
US7533709B2 (en) 2005-05-31 2009-05-19 Curt G. Joa, Inc. High speed vacuum porting
US7398870B2 (en) 2005-10-05 2008-07-15 Curt G. Joa, Inc Article transfer and placement apparatus
US7770712B2 (en) 2006-02-17 2010-08-10 Curt G. Joa, Inc. Article transfer and placement apparatus with active puck
US9622918B2 (en) 2006-05-18 2017-04-18 Curt G. Joe, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US9433538B2 (en) 2006-05-18 2016-09-06 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web and formation of articles using a dual cut slip unit
US7780052B2 (en) 2006-05-18 2010-08-24 Curt G. Joa, Inc. Trim removal system
US8293056B2 (en) 2006-05-18 2012-10-23 Curt G. Joa, Inc. Trim removal system
US7975584B2 (en) 2007-02-21 2011-07-12 Curt G. Joa, Inc. Single transfer insert placement method and apparatus
US8794115B2 (en) 2007-02-21 2014-08-05 Curt G. Joa, Inc. Single transfer insert placement method and apparatus
US9550306B2 (en) 2007-02-21 2017-01-24 Curt G. Joa, Inc. Single transfer insert placement and apparatus with cross-direction insert placement control
US8016972B2 (en) 2007-05-09 2011-09-13 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US9387131B2 (en) 2007-07-20 2016-07-12 Curt G. Joa, Inc. Apparatus and method for minimizing waste and improving quality and production in web processing operations by automated threading and re-threading of web materials
US8398793B2 (en) 2007-07-20 2013-03-19 Curt G. Joa, Inc. Apparatus and method for minimizing waste and improving quality and production in web processing operations
US8182624B2 (en) 2008-03-12 2012-05-22 Curt G. Joa, Inc. Registered stretch laminate and methods for forming a registered stretch laminate
US8172977B2 (en) 2009-04-06 2012-05-08 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US8673098B2 (en) 2009-10-28 2014-03-18 Curt G. Joa, Inc. Method and apparatus for stretching segmented stretchable film and application of the segmented film to a moving web
US9089453B2 (en) 2009-12-30 2015-07-28 Curt G. Joa, Inc. Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article
US8460495B2 (en) 2009-12-30 2013-06-11 Curt G. Joa, Inc. Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article
US8663411B2 (en) 2010-06-07 2014-03-04 Curt G. Joa, Inc. Apparatus and method for forming a pant-type diaper with refastenable side seams
US9603752B2 (en) 2010-08-05 2017-03-28 Curt G. Joa, Inc. Apparatus and method for minimizing waste and improving quality and production in web processing operations by automatic cuff defect correction
US9566193B2 (en) 2011-02-25 2017-02-14 Curt G. Joa, Inc. Methods and apparatus for forming disposable products at high speeds with small machine footprint
US8656817B2 (en) 2011-03-09 2014-02-25 Curt G. Joa Multi-profile die cutting assembly
USD684613S1 (en) 2011-04-14 2013-06-18 Curt G. Joa, Inc. Sliding guard structure
US8820380B2 (en) 2011-07-21 2014-09-02 Curt G. Joa, Inc. Differential speed shafted machines and uses therefor, including discontinuous and continuous side by side bonding
US9809414B2 (en) 2012-04-24 2017-11-07 Curt G. Joa, Inc. Elastic break brake apparatus and method for minimizing broken elastic rethreading
US9283683B2 (en) 2013-07-24 2016-03-15 Curt G. Joa, Inc. Ventilated vacuum commutation structures
USD704237S1 (en) 2013-08-23 2014-05-06 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD703712S1 (en) 2013-08-23 2014-04-29 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD703711S1 (en) 2013-08-23 2014-04-29 Curt G. Joa, Inc. Ventilated vacuum communication structure
USD703247S1 (en) 2013-08-23 2014-04-22 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD703248S1 (en) 2013-08-23 2014-04-22 Curt G. Joa, Inc. Ventilated vacuum commutation structure
US9289329B1 (en) 2013-12-05 2016-03-22 Curt G. Joa, Inc. Method for producing pant type diapers

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