|Número de publicación||US3128206 A|
|Tipo de publicación||Concesión|
|Fecha de publicación||7 Abr 1964|
|Fecha de presentación||30 Nov 1960|
|Fecha de prioridad||6 May 1959|
|Número de publicación||US 3128206 A, US 3128206A, US-A-3128206, US3128206 A, US3128206A|
|Cesionario original||Artof Maschb Dr Ing Meier Wind|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (6), Citada por (69), Clasificaciones (11)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
Apnl 7, 1964 J. DUNGLER 3,128,206
APPARATUS FOR A WET FINISHING PROCESS FOR CONTINUOUS SHEETS OF MATERIALS 2 Sheets-Sheet 1 Filed Nov. 50, 1960 FIGI.
mvcu'ron JULIEN DUNGLER ATTY S.
April 7, 1964 J DUNGLER 3,128,206
APPARATUS FOR A WET FINISHING PROCESS FOR CONTINUOUS SHEETS OF MATERIALS Filed Nov. 30, 1960 2 Sheets-Sheet 2 FIGZ.
LIQUID GAS OR STEAM STEAM mvzu'ron; J UL.|EN DUNGLER ATTYS,
United States Patent APPARATUS FOR A WET FINISHING PROCESS FOR CONTINUOUS SHEETS OF MATERIALS Julien Dungler, Basel, Switzerland, assignor to Artof Maschinenbau Dr. Ing. Meier-Windhorst, Hamburg,
Germany Filed Nov. 30, 1%0, Ser. No. 72,739 14 Claims. (Cl. 11850) The present invention relates to an improvement in continuous wet finishing of continuous fibers, webs, and other synthetic-fiber or synthetic-resin material, and more particulartly to improved apparatus for effecting this finishing.
Wet-finishing processes include, for example, the impregnation of webs by undissolved chemical products or by chemical products in Watery solution as well as the finishing by acid, neutralization, oxidation, washing, etc.
Modern machines for continuous treatment consist, for the most part, of one or a plurality of deep troughs with two sets of cylinders lying above each other for the guidance of the web. One of these sets is usually located in the trough, in the fluid. At the delivery end of the machine, there often is a squeezing device. Thesemachines have various disadvantages.
A first disadvantage is that large quantities of mixtures are consumed. The alternate passage through the fluid and through air is not advantageous when certain methods are used. Furthermore, there are difficulties with feeding of the web, especially through the cylinders at the bottom of the deep trough. This difficulty is especially great where machines having an especially narrow run or with labyrinth passages are concerned. The difliculties also arise at refeeding of the web through the mixtures, in the case of loosening of a suture, or if the web ruptures. Moreover, the adjustment of the tension of the run is diflicult.
The present invention eliminates the difficulties mentioned and has the advantage that the passage of goods takes place inside columns of liquid or of gas, above a fluid level.
According to the invention, a device for a wet-finishing process for continuous sheet or extruded goods is proposed in which, above a trough that carries the pulling, guiding, and treating elements for the cloth layer, one or several hoods, covering these elements, are arranged. The open bottom sides of these hoods are immersed in the treating fluid. The hoods are arranged so that they can be easily shifted and removed. This design permits the use of small quantities of gaseous or fluid mixtures. The pull of the material to be treated is adjusted by the pulling elements. This includes movable guide rollers, which float in the fluid and the weight of which differs from the volume weight of the displaced fluid, in which they are immersed completely or partially. The guiding elements for the cloth layer may consist of a single guide roller, but also of several rollers to obtain a long pas sage. The goods can be guided over these rollers by the spreading method, that is, as a continuous sheet, or by the rope method.
The trough can be divided by partitions into compartments of variable heights of the levels of the treating fluid. It is expedient if the level of the fluid in the rear compartments of the trough-as seen in the direction of the travel of the cloth layer-is higher than in the front compartments and the treating fluid successively flows through the various compartments in the direction opposite to the travelling direction of the cloth layer. To hold the fluid level constant in the various compartments overflow pipes may be arranged in them.
It is beneficial if the hoods that are arranged above the trough are made of transparent material, which perlCG mits the goods to remain visible throughout the entire process of treatment. Of course, metal can also be used for the construction of the hoods. Then it is advantageous to arrange windows in the hoods for observation of the goods. For minimizing the loss of heat in the hoods, insulation may be used. The insulation may embrace the entire hoods or only single parts.
To obtain a treatment of goods as intensive as possible, the space under the hoods should be filled, completely or partially, with the treating fluid. Then the goods are held under the mixture during the whole passage through the device according to the invention. Instead of the treating fluid, however, the space under the hoods may also be filled with treating medium in vaporous or gaseous form. The temperature of the gaseous solvent inside of the hoods may, then, differ from that of the treating fluid. It is possible to provide for a heater for heating the treating fluid or the vaporous or gaseous treating medium. The height of the fluid level in the hood, as well as the filling of the gaseous or vaporous treating medium may be altered as desired and vary according to the conditions in the factory.
If there is vapor gas in the interior space of the hoods, then it is expedient to arrange insulated partitions, with openings for the passage of the cloth layer, between the treating fluid in the trough and the interior space of the hoods that is filled with vapor or gas. These insulated partitions prevent a temperature exchange between the two media.
It is advantageous to provide each hood with a feed pipe for vapor or gases. and the treating fluid, as well as with a drain pipe and a relief cock. The feed pipes for vapor or gases and the treating fluid are insulated. The filling and emptying of the hoods is effected as follows: for instance, in the case of filling with treating fluid, fluid is led under the hood by the corresponding devices.
feed pipe, and the emptying of air from the hood is effected through the relief cock. In the case of filling with vapor or gas as treating media, the procedure is carried out accordingly. If the fluid level under the hood is to be raised, the vapor, the gas or the air, which are under the hood, are sucked out through the drain pipe.
To be removed easily, the hoods hang on ropes or chains passing over rolls with counterweights. After the removal of the hoods, the pulling, guiding, and treating elements are easily accessible at all points, so that the introduction of the cloth layer does not cause any difliculties.
For special treatment it is possible to arrange vibration elements inside the hoods as treating elements for the cloth layer.
Additional details of the invention will be more readily apparent from the following detailed description of the invention when taken with the accompanying drawings, in which:
FIG. 1 is a schematic longitudinal section through a machine according to the invention having four columns;
FIG. 2 is a cross-section through the same machine; and
FIG. 3 is a sectional view of a detail of the machine.
The apparatus contains a trough 1 of low height, made, for example, of stainless steel or of plastic, in which there is a watery solution of pure water. The trough 1 can be subdivided by cross partitions 2 and 2', and the liquid levels between the partitions can have different heights 3 and 3. For heating there are heating elements 4 on the bottom of the trough 1. -In the trough, a row of cylinders 5 are arranged, which can be driven, separately or jointly, by variable speed electric motors 6. The power transmission is effected by gears 7 and 7' or by other Instead of individual drives, other devices that drive all cylinders simultaneously can be used. Because of the low height of the liquid level in the trough, the cylinders 5 lie close to the surface of the liquid. Because of this, they can be put into operation in a simple manner, without the need of leading the drive journals of the cylinders through the wall of the trough by means of sealed shaft collars; and moreover, they are easily accesible. The overflow pipes 8 and 8' regulate the liquid level in the trough.
An essential part of the machine are special devices, by which the goods to be treated 9 are subjected to the effect of the mixtures or of several liquid or gaseous solutions during their entire passage. For this purpose, one or several columns with liquid or gaseous solutions are provided for as hoods 11B, 11, 12, 13, the bottom sides of which are immersed in the mixture below levels 3 and 3'.
These hoods can be easily lifted off by sprockets or pulleys 14, over which chains or ropes 15 run, which are connected with the hoods and at the free ends of which there are counterweights 16 which keep the hoods balanced. The hoods may consist of transparent plastic or of metal. If the former is the case, the walls must be strong enough to protect the hot treating medium against quick loss of heat. If the latter is the case, they may be insulated and provided with windows for observation, through which the run of material in the interior of the hoods can be checked.
In the interior of the hoods 10, 11, 12, 13, a number of material guiding and treating elements are set up, the shapes and arrangements of which can be different in the different hoods.
Thus, the hood 19 contains guide rollers 17, 17', and 18, over which the material can be led back and forth continuously. A cross partition 19 separates the air space of the hood from the liquid level 3.
Openings 20 or transition slots, which are sealed by soft seals of plastic, see FIG. 3, make the passage of the material to be treated possible.
The cylinders 17, 17', 18 and the cross partition 19 are held by struts 21, which are fastened to the trough 1. If the hood is lifted, the parts in the interior of the hood are laid open. This makes them easily accessible by which the introduction of the product is made easier. Main pipes 22, 23, 24 are connected with the interior of the hood by pipes 25. These pipes immerse in the mixture of the trough 1 and extend to the upper part of the hood.
The pipe 22, for instance, provides the interior of the hood with steam. The pipe 23 can suck the gas or the steam out of the hood, which fact makes it possible for the liquid to fill the hood completely or partially. The plipe 24 serves to feed a liquid into the interior of the If the hood is to be emptied, the valve 26 must be opened whereby the interior of the hood is open to the outer air.
The inner equipment of the hood 11 contains an upper movable guide roll 27, which is held by lateral bearings 28 and which lies above a container 29, which serves, for instance, the purpose of receiving steam heating elements.
The hood 11 likewise contains a horizontal partition 19 as well as a partition 2. Thus, liquid in this part of the container is limited, on the one hand, by trough 1 and on the other hand, by partition 2; the liquid level may thus differ from that of the other part of the container.
If the hood 11 is filled far enough and the partition or the container 29 submerges in the liquid the connection between both liquid levels can be established. For this purpose, the valve 26 must be closed and the valve 30 must be opened. The gaseous medium in the hood is thus sucked out and the treating fluid fills out the space. Also the valve 31, which controls the entrance of the liquid led through pipe 24, could be opened.
Another arrangement is seen in the interior of the hood 12. It contains a fixed cylinder 32, which runs on bearings above the container 33. This container is pulled down to the cross partition 2.
FIG. 1 shows the difference of the liquid levels 3 and 3' in front and behind the partition 2. The supplying of the trough 1 with liquid is effected according to the so called counter-stream principle, that is, the new liquid flows in at the rear end of the trough, as seen in the direction of the travel of the goods. In consequence, the liquid level in the rear 3 is higher than that in the front 3'.
In the interior of the hood 12 there is a tendency for compensation in the material-passage space, by which it is filled with liquid. By lifting effect the liquid level 3 rises over the wall 33 and overflows into the front part of the trough 1.
If the treatment requires it, in this manner, columns of liquid can be created over the entire run of goods.
In the hood 13 another possibility of design is shown. It contains the cylinders 35, 36, 37, and 38, which guarantee an extended run of goods in the smallest space. A partition 39 reaching down to the bottom of the trough 1 permits through suction the circulation of the fluid from one side of this partition to the other.
If needed, the column of liquid can be replaced by a column of gas.
After discharge from the last hood the material is led to a spreader 4t) and then to the squeeze rolls 41.
Squeeze rolls may also be arranged at the delivery end of each hood; likewise, squeezing can take place in the mixture.
The apparatus described and shown in the drawings can, of course, be modified in details of construction without departing from the scope and spirit of the invention, as for example, the hoods or individual parts can be made to vibrate in order to intensify the effect of treatment.
1. Apparatus for a wet finishing process for continuous sheets of materials comprising a treatment liquid carrying trough, a plurality of rotatably mounted material pulling cylinders immersed in the liquid in said trough for successively pulling a continuous sheet of material through the trough, a plurality of material guiding and treating elements around which the material passes during treatment, said elements being positioned above said pulling cylinders, hoods having open bottom sides immersed in the treatment liquid in the trough and means suspending said hoods so that they can be easily adjusted and removed, said hoods enclosing said guiding and treating elements in a plurality of successive runs of the material being treated, and a cross partition disposed in sealing relation across at least one of said hoods proximate the open bottom side thereof, said cross partition having transition slots therein permitting passage of the sheet of material therethrough, said cross partition closing the hood and providing a separate treating zone therewithin.
2. Apparatus as claimed in claim 1, a plurality of partitions dividing said trough into compartments and providing different heights of the level of the treating liquid in various ones of said compartments.
3. Apparatus as claimed in claim 2, including means for passing the treating fluid through the various compartments of the trough in the direction opposite to the travel of the cloth layer.
4. Apparatus as claimed in claim 3, wherein overflow pipes are arranged in the various compartments of the trough.
5. Apparatus as claimed in claim 4, wherein the pulling cylinders are arranged directly under the surfaces of the liquid in the trough.
6. Apparatus as claimed in claim 5, said hoods being of transparent material.
7. Apparatus as claimed in claim 5, said hoods being metal and having windows therein.
8. Apparatus as claimed in claim 1, wherein each of the hoods is provided with a feed pipe for gases and for 5 the treating fluid as well as with a discharge pipe and a relief cock.
9. Apparatus as claimed in claim 1, wherein the hoods are connected to ropes having counter weights and passing over rolls.
10. Apparatus as claimed in claim 1, including means for introducing and maintaining a treating fluid in the spaces enclosed by said hoods.
11. Apparatus as claimed in claim 1, wherein said cross partition transition slots include a sealing means for en- 10 gagement with the continuous sheets.
12. Apparatus as claimed in claim 11 wherein said cross partition transition slot sealing means comprises soft plastic seals.
13. Apparatus as claimed in claim 12, wherein said 15 6 hoods and cross partitions are of an insulated construction.
14. Apparatus as claimed in claim 1 including means for introducing and maintaining a combinatipn of a treating liquid and the vapor of the liquid in the spaces enclosed by said hoods.
References Cited in the file of this patent UNITED STATES PATENTS 1,596,671 Lionne Aug. 17, 1926 2,065,636 Whipple Dec. 29, 1936 2,083,731 Miller June 15, 1937 2,374,535 Gibson Apr. 24, 1945 2,451,890 Ufnowski Oct. 19, 1948 2,542,064 Tilden Feb. 20, 1951 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No, 3,128,206 April 7, 1964 Julien Dungler It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below Column 2, line 23, after "vapor" insert or column 2, line 64, for "of" read or same Signed and sealed this 4th day of August 1964,,
( L) Attest:
EDWARD J. BRENNER ERNEST w. SWID E At t estin g Officer Commissioner of Patents
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US1596671 *||6 Ago 1921||17 Ago 1926||Lionne Ernest||Method and apparatus for impregnating fabrics|
|US2065636 *||4 Mar 1931||29 Dic 1936||Mantle Lamp Company||Apparatus for treating or impregnating paper|
|US2083731 *||1 Nov 1932||15 Jun 1937||Barrett Co||Absorbent article-saturating apparatus|
|US2374535 *||27 Mar 1944||24 Abr 1945||Gibson Robert M||Quenching vessel|
|US2451890 *||4 Ago 1939||19 Oct 1948||Waclaw Ufnowski||Collection of gases from artificial silk and the like|
|US2542064 *||3 Nov 1947||20 Feb 1951||Permafuse Corp||Apparatus for making means to attach friction material to brake shoes and the like|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US3352284 *||22 Jul 1965||14 Nov 1967||United States Steel Corp||Retractable exhaust hood for a processing vessel|
|US3981162 *||26 Nov 1973||21 Sep 1976||Shimon Klier||Continuous treatment of textile materials|
|US4007706 *||6 May 1975||15 Feb 1977||Arvidsson K E||Apparatus for treating work pieces|
|US4136535 *||15 Mar 1978||30 Ene 1979||Audas Francis G||Padding apparatus for goods in web-form|
|US4350028 *||13 Nov 1980||21 Sep 1982||Luk Lamellen Und Kupplungsbau Gmbh||Automatic towel dispenser|
|US4633806 *||5 Jun 1985||6 Ene 1987||Bruckner Apparatebau Gmbh||Apparatus for the wet treatment of a continuous length of textile material|
|US5056457 *||2 Nov 1989||15 Oct 1991||Takuma Co., Ltd.||Varnish impregnation method and apparatus|
|US5137756 *||1 Ago 1991||11 Ago 1992||Takuma Co., Ltd.||Varnish impregnation method|
|US5332438 *||19 Jun 1992||26 Jul 1994||Bando Chemical Industries, Ltd.||Vertical type dip treating device|
|US7452436||9 Mar 2006||18 Nov 2008||Curt G. Joa, Inc.||Transverse tape application method and apparatus|
|US7533709||31 May 2005||19 May 2009||Curt G. Joa, Inc.||High speed vacuum porting|
|US7537215||22 Abr 2005||26 May 2009||Curt G. Joa, Inc.||Method and apparatus for securing stretchable film using vacuum|
|US7618513||31 May 2005||17 Nov 2009||Curt G. Joa, Inc.||Web stabilization on a slip and cut applicator|
|US7638014||18 Mar 2005||29 Dic 2009||Curt G. Joa, Inc.||Method of producing a pants-type diaper|
|US7640962||20 Abr 2005||5 Ene 2010||Curt G. Joa, Inc.||Multiple tape application method and apparatus|
|US7703599||12 Abr 2005||27 Abr 2010||Curt G. Joa, Inc.||Method and apparatus for reversing direction of an article|
|US7708849||4 Ene 2006||4 May 2010||Curt G. Joa, Inc.||Apparatus and method for cutting elastic strands between layers of carrier webs|
|US7770712||17 Feb 2006||10 Ago 2010||Curt G. Joa, Inc.||Article transfer and placement apparatus with active puck|
|US7780052||18 May 2006||24 Ago 2010||Curt G. Joa, Inc.||Trim removal system|
|US7811403||7 May 2007||12 Oct 2010||Curt G. Joa, Inc.||Transverse tab application method and apparatus|
|US7861756||8 May 2007||4 Ene 2011||Curt G. Joa, Inc.||Staggered cutting knife|
|US7909956||13 Ago 2009||22 Mar 2011||Curt G. Joa, Inc.||Method of producing a pants-type diaper|
|US7975584||21 Feb 2008||12 Jul 2011||Curt G. Joa, Inc.||Single transfer insert placement method and apparatus|
|US8007484||1 Abr 2005||30 Ago 2011||Curt G. Joa, Inc.||Pants type product and method of making the same|
|US8016972||8 May 2008||13 Sep 2011||Curt G. Joa, Inc.||Methods and apparatus for application of nested zero waste ear to traveling web|
|US8172977||5 Abr 2010||8 May 2012||Curt G. Joa, Inc.||Methods and apparatus for application of nested zero waste ear to traveling web|
|US8182624||11 Mar 2009||22 May 2012||Curt G. Joa, Inc.||Registered stretch laminate and methods for forming a registered stretch laminate|
|US8293056||24 Ago 2010||23 Oct 2012||Curt G. Joa, Inc.||Trim removal system|
|US8398793||20 Jul 2007||19 Mar 2013||Curt G. Joa, Inc.||Apparatus and method for minimizing waste and improving quality and production in web processing operations|
|US8417374||26 Abr 2010||9 Abr 2013||Curt G. Joa, Inc.||Method and apparatus for changing speed or direction of an article|
|US8460495||27 Dic 2010||11 Jun 2013||Curt G. Joa, Inc.||Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article|
|US8557077||21 Mar 2011||15 Oct 2013||Curt G. Joa, Inc.||Method of producing a pants-type diaper|
|US8656817||7 Mar 2012||25 Feb 2014||Curt G. Joa||Multi-profile die cutting assembly|
|US8663411||6 Jun 2011||4 Mar 2014||Curt G. Joa, Inc.||Apparatus and method for forming a pant-type diaper with refastenable side seams|
|US8673098||25 Oct 2010||18 Mar 2014||Curt G. Joa, Inc.||Method and apparatus for stretching segmented stretchable film and application of the segmented film to a moving web|
|US8794115||7 Jul 2011||5 Ago 2014||Curt G. Joa, Inc.||Single transfer insert placement method and apparatus|
|US8820380||29 Mar 2012||2 Sep 2014||Curt G. Joa, Inc.||Differential speed shafted machines and uses therefor, including discontinuous and continuous side by side bonding|
|US8945679 *||7 Oct 2009||3 Feb 2015||Kaindl Decor Gmbh||Apparatus for impregnating web-like materials with thermally curable impregnating resin|
|US9089453||11 Jun 2013||28 Jul 2015||Curt G. Joa, Inc.||Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article|
|US9283683||24 Abr 2014||15 Mar 2016||Curt G. Joa, Inc.||Ventilated vacuum commutation structures|
|US9289329||4 Dic 2014||22 Mar 2016||Curt G. Joa, Inc.||Method for producing pant type diapers|
|US9387131||15 Jun 2011||12 Jul 2016||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|
|US9433538||12 Oct 2012||6 Sep 2016||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|
|US9550306||1 May 2013||24 Ene 2017||Curt G. Joa, Inc.||Single transfer insert placement and apparatus with cross-direction insert placement control|
|US9566193||24 Feb 2012||14 Feb 2017||Curt G. Joa, Inc.||Methods and apparatus for forming disposable products at high speeds with small machine footprint|
|US9603752||2 Ago 2011||28 Mar 2017||Curt G. Joa, Inc.||Apparatus and method for minimizing waste and improving quality and production in web processing operations by automatic cuff defect correction|
|US9622918||12 Oct 2010||18 Abr 2017||Curt G. Joe, Inc.||Methods and apparatus for application of nested zero waste ear to traveling web|
|US9637849 *||27 Jun 2013||2 May 2017||Oerlikon Textile Gmbh & Co. Kg||Device and method for the treatment, in particular electrolysis or cleaning, of endless fibers, threads or webs of fabric|
|US9809414||23 Abr 2013||7 Nov 2017||Curt G. Joa, Inc.||Elastic break brake apparatus and method for minimizing broken elastic rethreading|
|US20050230056 *||20 Abr 2005||20 Oct 2005||Curt G. Joa, Inc.||Multiple tape application method and apparatus|
|US20050233881 *||12 Abr 2005||20 Oct 2005||Curt G. Joa, Inc.||Method and apparatus for reversing direction of an article|
|US20050275148 *||22 Abr 2005||15 Dic 2005||Curt G. Joa, Inc.||Method and apparatus for securing stretchable film using vacuum|
|US20060201619 *||9 Mar 2006||14 Sep 2006||Curt G. Joa, Inc.||Transverse tape application method and apparatus|
|US20060224137 *||1 Abr 2005||5 Oct 2006||Curt G. Joa, Inc.||Pants type product and method of making the same|
|US20060265867 *||31 May 2005||30 Nov 2006||Curt G. Joa, Inc.||Use of ultrasonic horn to mechanically secure hooks to a smooth material web|
|US20060266465 *||31 May 2005||30 Nov 2006||Curt G. Joa, Inc.||High speed vacuum porting|
|US20070250032 *||7 Mar 2007||25 Oct 2007||Curt G. Joa, Inc.||Refastenable tab for disposable pant and methods for making same|
|US20070267149 *||18 May 2006||22 Nov 2007||Curt G. Joa, Inc.||Trim removal system|
|US20070284048 *||8 May 2007||13 Dic 2007||Curt G. Joa, Inc.||Staggered cutting knife|
|US20090020211 *||20 Jul 2007||22 Ene 2009||Curt G. Joa, Inc.||Apparatus and method for minimizing waste and improving quality and production in web processing operations|
|US20110290180 *||7 Oct 2009||1 Dic 2011||Kaindl Decor Gmbh||Apparatus for impregnating web-like materials with thermally curable impregnating resin|
|US20150275411 *||27 Jun 2013||1 Oct 2015||Trützschler GmbH & Co., KG||Device and method for the treatment, in particular electrolysis or cleaning, of endless fibers, threads or webs of fabric|
|USD684613||14 Abr 2011||18 Jun 2013||Curt G. Joa, Inc.||Sliding guard structure|
|USD703247||23 Ago 2013||22 Abr 2014||Curt G. Joa, Inc.||Ventilated vacuum commutation structure|
|USD703248||23 Ago 2013||22 Abr 2014||Curt G. Joa, Inc.||Ventilated vacuum commutation structure|
|USD703711||23 Ago 2013||29 Abr 2014||Curt G. Joa, Inc.||Ventilated vacuum communication structure|
|USD703712||23 Ago 2013||29 Abr 2014||Curt G. Joa, Inc.||Ventilated vacuum commutation structure|
|USD704237||23 Ago 2013||6 May 2014||Curt G. Joa, Inc.||Ventilated vacuum commutation structure|
|USRE30658 *||1 Nov 1978||30 Jun 1981||Apparatus for treating work pieces|
|Clasificación de EE.UU.||118/50, 118/419, 68/5.00R, 118/429, 118/65, 68/181.00R, 68/5.00E|
|Clasificación cooperativa||D06B2700/09, D06B3/10|