US2582806A - Drying of hollow yarn bodies - Google Patents

Drying of hollow yarn bodies Download PDF

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Publication number
US2582806A
US2582806A US3924A US392448A US2582806A US 2582806 A US2582806 A US 2582806A US 3924 A US3924 A US 3924A US 392448 A US392448 A US 392448A US 2582806 A US2582806 A US 2582806A
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US
United States
Prior art keywords
drying
yarn
bodies
cakes
plates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US3924A
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English (en)
Inventor
Robbert V Nes
Lelij Anton
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Akzona Inc
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American Enka Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/001—Drying and oxidising yarns, ribbons or the like
    • F26B13/003—Drying and oxidising yarns, ribbons or the like in the shape of spools, coils, bobbins or the like
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0409—Supporting filaments or the like during their treatment on bobbins
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0418—Supporting filaments or the like during their treatment as cakes or similar coreless thread packages
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/06—Washing or drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy

Definitions

  • This invention relates to high frequency drying and more particularly to an improved method and apparatus for effecting the drying of hollow yarn bodies by subjecting them to the action of a high frequency electrostatic field operating, for example, above megacycles.
  • yarn bodies may be uniformly dried throughout their volume by electrostatic methods without recourse to physical movement of either the yarn bodies or the capacitors, and it is therefore an object of this invention to provide a method and apparatus for the high frequency drying of hollow yarn bodies at a uniform rate which is characterized by the maintenance of uniform physical and mechanical properties of the yarn throughout the yarn body.
  • Figure 1 is a schematic end view of a hollow yarn body disposed in a high frequency electrostatic drier constructed in accordance with the principles of the present invention
  • Figure 2 is a view similar to Figure l but illustrating a modified circuit arrangement leading to the plates of the condensers which establish the electrostatic field;
  • Figure 3 is another view also similar to Figure 1 but illustrating a different disposition of the plates of the condensers which establish the electrostatic field; ⁇
  • Figure 4 is a View in side elevation of a plurality of cakes so disposed and covered as to protect their outer surfaces against undesirable non-uniform drying during subjection to high frequency electrostatic fields;
  • Figure 5 is a top plan view of a yarn cake having therein a. core body constructed in accordance with the principles of the present invention
  • Figure 6 is a vertical sectional view taken along the line 6-8 of Figure 5;
  • Figure is a schematic view of apparatus for the continuous or intermittent drying of hollow yarn bodies in accordance with the teachings of the present invention.
  • Figure 8 is a perspective view of batch high frequency drying apparatus according to the present invention wherein a conductor is disposed centrally of the cakes to be dried.
  • Figure 9 is a perspective view of apparatus according to the present invention for drying a column of yarn bodies in a rotating electrostatic field.
  • the numeral III designates a hollow yarn body which is physically supported in a horizontal position on a rod Il.
  • a plurality of arcuate plates I2, I3 and I4 Surrounding the yarn body are a plurality of arcuate plates I2, I3 and I4, these plates constituting capacitors for the establishment therebetween of high frequency electrostatic elds.
  • the plate I2, the plate I3, and the plate I4 are connected to a source I4d of high frequency alternating currents, which differ in phase by 120, it will be apparent that the field established between the several plates I2, I3 and I4 will rotate relative to the yarn body so that the average field distribution throughout all portions of the yarn body over the drying period will be constant.
  • the yarn body even though held stationary, may be subjected to the action of an electrostatic field having a high average uniformity and this field will cause the uniform drying of the yarn ⁇ body throughout.
  • the condenser plates may be connected in parallel groups rather than as single units.
  • An example of this modication is shown in Figure 2, where three pairs of condenser plates are shown.
  • the plate I5 is connected in parallel with the 'plate I6, the plate I1 is connected in parallel with the plate I8, and the plate I9 is connected in parallel with the plate 20.
  • the components of the parallel connected pairs are disposed physically 180 apart about a yarn body 2
  • 'I'he pair I5 and I6 is connected through a lead 23 to a source 24a of high frequency alternating current.
  • the pair I1 and I8 is connected through a lead 24 and the pair I9 and 20 is connected through a lead 25.
  • the leads 23, 24 and 25 are supplied with currents 120 out of phase so that again a rotating field is established which has a high uniformity (averaged over the drying period) throughout all parts of the yarn body.
  • phase angle it is not necessary that a three phase system be used or that the phase angle be 120.
  • four plates 2B, 21, 28 and 29 may be used, these plates being disposed about a yarn body 30 supported on a rod 3
  • the phase angle of the outputs of the high frequency source 29a is 90. Accordingly, it is apparent that to determine the phase angle it is only necessary to find the quotient oi' 360 divided by the number of plates. Naturally, if the plates are arranged in parallel groups, as indicated in Figure 2, then the quotient will have to be 360 divided by the number of groups. Hence, the phase angle in Figure 2 is 120 while the phase angle in Figure 3 is 90.
  • the speed df rotation of the electrostatic eld is determined for the most part by the strength of the field, or otherwise stated, by the amount of energy supplied to the body to be treated per unit time. As this amount of energy increases, the speed of rotation of the field must be greater.
  • a material 43 which has been found to protect the surface of the cakes during drying but is sufficiently open to permit the escape of the steam which is evolved.
  • the wrapping material 43 may be provided with perforations or other apertures.
  • An ideal wrapper is one having dielectric properties which correspond as much as possible to those of the body to be treated. This is also true of the plates and annular members which bear against the end faces of the bodies to be treated.
  • one suitable material, of which the annular members 4I and 42 may be made is cellulose paper.
  • the wrapper or plate when using a dry wrapper or dry plates which are in contact with the bodies to be treated, the wrapper or plate must not be permitted to become so hot as to have a detrimental infiuence on the bodies to be treated.
  • the wrapper and piates can be made of a material having a smaller loss angle than the material of the body to be treated.
  • the end plates 4I and 42 should be made of a material which will absorb moisture, and thus the thread layers at the ends of the cakes against which the annular members 4I and 42 bear will be affected by the electrostatic field in the same way as the portions in the center of the spinning cake.
  • the three condenser plates which provide the electrostatic field which performs the drying operation in connection with Figure 4 are indicated by reference numerals 42a, 42h and 42e. It will be noted that the plates 42a, 42h and 42e extend for the full length of the group of cakes and are arranged relative to one another in the scheme disclosed in connection with Figure l. 'Ihe source oi' high frequency currents for the plates 42a, 42h and 42e is indicated schematically at 42d.
  • All of the high frequency generators are illustrated as block diagrams and include a block diagram labeled Phase Shifting Networks. This type of illustration has been used in view of the fact that both high frequency generators per se and the phase-shifting devices associated therewith constitute, per se, no part of this invention.
  • phaseshifting networks suitable for the purpose of the present invention may be designed, reference is made to Terman, Radio Engineer's Handbook, McGraw-Hill, 1943.
  • each cake may be provided with a core body 44 of some insulating material such as a. ceramic.
  • This core body fits into the central hole in the cake and is itself provided with a plurality of axially extending holes or channels 45, 45. 41 and 45 which communicate with radial holes or ports 45a, 45a, 41a and 45a respectively.
  • steam evolved during the drying operation can pass through the radial ports and into the axial passageways and from there to atmosphere.
  • the ports 45a. 45a, 41a and 45a can be inclined in the direction of escape of the steam to further the flow of steam to the desired outlet.
  • a rod 49 of electrically conductive material Centrally located in the core body 44, there is provided a rod 49 of electrically conductive material. 'I'he rod 49 is provided with a socket 50 at one end and a projection i at the other.
  • the mouth of the socket 59 lies fiush with one end face of the cake when the core body 44 is in position, while the projection 5I extends above the core body enough to be received in the socket of another conducting rod located in the core body of the cake next above it in a vertical stack.
  • a plurality of spinning cakes 52 may be arranged side by side on a conveyor belt 5I driven in the direction of the arrow of Figure 7 by ⁇ pulleys 54 and 55.
  • the packages fall into a chute or vertical guideway 55 and become connected to one another through the operation of the projections and sockets of the rods 49.
  • a series of conveyor elements 51 and 55 which are vertically arranged, control the rate of fall of the stacked thread bodies in the chute 55.
  • the thread bodies are subjected to the action of a high frequency electrostatic field.
  • the escape of steam is very conveniently effected through the channels 45, 46, 41 and 45 which may be caused to register by rendering the projection 5l and the complementary socket 50 of some nonround cross section as for example, square, as indicated in Figure 5.
  • the arrangement of Figure 7 may be operated as an intermittent batch system or as a truly continuous system, depending upon the length and intensity of the electrostatic iield through which the cakes are passed. If a batch system is employed, the conveyors 55, 51 and 55 are operated periodically in timed relationship. If a truly continuous operation is contemplated, these conveyors are continuously operated at a relatively low rate of speed. It is apparent that one of the advantages of the vertical arrangement of Figure 7 is that the weight of the cakes tends to maintain the cake ends in butting relationship during their travel through the electrostatic field.
  • FIG 8 there are shown six plates 69, 10, 1I, 12, 13 and 14.
  • the plates are arranged in an annular path around the outside ofthe cakes and the interior of the cakes is provided with a centrally located conductive rod indicated at l5.
  • the plate 69, the rod 'l5 and the plate 12 constitute a pair of condensers in series and two other such pairs are provided respectively by the plates 'l0-13 and 'li- 14, each in co-action with the rod 15.
  • temperatures to which the bodies are subjected during drying depend upon the properties of the component threads of the cakes.
  • temperatures higher than those assumed to be maximum in the prior art may be used.
  • the temperatures in spinning cakes or spools remain low as long as they are wet, because the heat supplied to the spinning cakes is employed in evaporating the moisture content.
  • Enough energy may be supplied tothe spinning cakes so that the drying takes place at a temperature of about 100 C. without detrimental consequences. It may be desirable, however, after a part of the moisture has been removed, to continue drying at lower temperatures. Optionally, this may be done'in a second eld following the first.
  • Apparatus for drying hollow yarn bodies which comprises a plurality of condenser plate assemblies the plates of which are so spaced relative to one another as to substantially surround the exterior of a hollow yarn body to be dried, and means for supplying said assemblies with high frequency currents separated in phase by a number of degrees corresponding to the quotient of 360 divided by the number of assemblies.
  • Apparatus for drying hollow yarn bodies which comprises three pairs of condenser plates, the components of each pair being connected in parallel, said plates being so positioned relative to one another as to substantially surround the exterior of a ⁇ hollow yarn body to be dried and the components of each pair lying 180 apart, and means supplyingl each of said pairs with high frequency currents separated in phase by 3.
  • Apparatus for batch drying a plurality of hollow yarn bodies which comprises a group of condenser plates, the components of the group being circumferentially spaced to surround a group of hollow yarn bodies arranged in end to end abutting relationship, a conductor spaced from the plates so as to lie within the hollow interior of the yarn body, and means supplying a high frequency current to each plate of the group, the high frequency currents supplied to the several plates differing in phase by the quotient of 360 divided by the number of series plates, whereby a rotating electrostatic field is provided to effect uniform drying of the elongate hollow yarn body.
  • An electrically nonconductive core for hollow yarn bodies having an axial gas port and radial gas ports connecting the inner layers of the yarn body with the axial gas port, an electrical conductor passing through said core, the electrical conductor comprising a portion at each end for connecting it to the conductor of another coreV to permit yarn bodies to be stacked for subjection to high frequency drying with the conductors of the several cores functioning as a part of the capacitor.
  • a core for hollow yarn bodies comprising a ceramic insert adapted to be received in the hollow interior of a yarn body, said ceramic having a plurality of axially extending gas ports therethrough with radially extending gas ports connecting the axially extending gas ports with the inner layers of the yarn body, a centrally located electrical conductor passing axially through said ceramic core, said conductor being provided with a projection at one end and a complementary socket at the other adapted for interconnection in a predetermined angular position so that a plurality of yarn bodies may be stacked in connected relationship with the conductors of the several cores electrically connected, and with the axially extending gas ports in registry by virtue of the alignment afforded by the angular mustment of the yam bodies to eltect the connection of the conductors.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
  • Cereal-Derived Products (AREA)
US3924A 1947-03-18 1948-01-23 Drying of hollow yarn bodies Expired - Lifetime US2582806A (en)

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NL (1) NL65428C (en(2012))

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650289A (en) * 1949-08-10 1953-08-25 Westinghouse Electric Corp Dielectric heating
US2740756A (en) * 1951-04-19 1956-04-03 Albert G Thomas Electrical drying system
DE954866C (de) * 1954-07-31 1956-12-27 Erwin Kolaczek Verfahren zum Trocknen hohler Wickelkoerper aus natuerlichen oder kuenstlichen Spinnstoffen durch strahlende Waerme im Vakuum
US2802085A (en) * 1955-11-01 1957-08-06 Modern Plastic Machinery Corp Apparatus for the treatment of plastic materials
US2866063A (en) * 1955-12-28 1958-12-23 Magnetic Heating Corp Drying of yarn by dielectric heating
US3090737A (en) * 1960-02-24 1963-05-21 Rca Corp Plasma heating apparatus and process
US4119826A (en) * 1977-04-04 1978-10-10 Champion International Corporation Dielectric heat generator
US4148346A (en) * 1976-06-14 1979-04-10 Scarnecchia O Vincent Method of and apparatus for drying and debarking logs
US4296294A (en) * 1974-06-01 1981-10-20 Reinhard Mohn Gmbh Method and apparatus for drying and setting the adhesive on books by vaporization of water using RF energy
US4296298A (en) * 1978-06-12 1981-10-20 Raytheon Company Dielectric cooking apparatus
DE3142172A1 (de) * 1981-10-23 1983-05-05 Siemens AG, 1000 Berlin und 8000 München Trockenanlage fuer faerbespulen in der textilindustrie
US4672980A (en) * 1980-04-02 1987-06-16 Bsd Medical Corporation System and method for creating hyperthermia in tissue
EP1753265A1 (en) * 2005-08-08 2007-02-14 Falmer Investments Limited Radio frequency textile drying machine
US10246813B2 (en) * 2013-12-09 2019-04-02 Whirlpool Corporation Method for drying articles
US10323881B2 (en) 2013-10-02 2019-06-18 Whirlpool Corporation Method and apparatus for drying articles
US10533798B2 (en) 2013-08-14 2020-01-14 Whirlpool Corporation Appliance for drying articles
US10655270B2 (en) 2015-03-23 2020-05-19 Whirlpool Corporation Apparatus for drying articles
US10816586B2 (en) 2013-10-16 2020-10-27 Whirlpool Corporation Method and apparatus for detecting an energized e-field
US10837702B2 (en) 2013-08-23 2020-11-17 Whirlpool Corporation Appliance for drying articles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873345A (en) * 1957-08-15 1959-02-10 Armstrong Cork Co Arc minimizers

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1605164A (en) * 1925-11-20 1926-11-02 Brandwood Joseph Apparatus for the treatment of yarn packages with fluids
US1733147A (en) * 1926-09-09 1929-10-29 Franklin Rayon Corp Method and means for dyeing and otherwise processing rayon
US1972050A (en) * 1932-08-08 1934-08-28 Jesse H Davis High frequency method of and apparatus for exterminating insect life in seed or grain or other materials
US2037483A (en) * 1930-05-20 1936-04-14 Glanzstoff Courtaulds Gmbh Method of and apparatus for drying artificial silk cakes
US2038036A (en) * 1934-01-11 1936-04-21 Louis S Fryer Method and apparatus for treating rayon
US2263681A (en) * 1938-10-19 1941-11-25 United Shoe Machinery Corp Treating rayon cakes
US2304958A (en) * 1940-11-25 1942-12-15 Rouy Auguste Louis Mar Antoine Heating of dielectric materials
US2329188A (en) * 1941-06-19 1943-09-14 Ohio Crankshaft Co Progressive heat treating
US2370624A (en) * 1942-10-01 1945-03-06 Rca Corp Electrical heating method
US2404191A (en) * 1944-04-22 1946-07-16 British Insulated Cables Ltd Dielectric heating electrode
US2413003A (en) * 1944-12-11 1946-12-24 Standard Telephones Cables Ltd High-frequency baking apparatus
US2415025A (en) * 1943-04-22 1947-01-28 Firestone Tire & Rubber Co Method and apparatus for treating matter in a high-frequency electric field
US2421334A (en) * 1944-04-26 1947-05-27 Ind Rayon Corp Method of treating twisted filamentary materials
US2428969A (en) * 1943-10-11 1947-10-14 Corning Glass Works Glass heating and working
US2433842A (en) * 1944-02-16 1948-01-06 American Viscose Corp Method of drying rayon thread by high-frequency electric currents
US2479351A (en) * 1945-08-10 1949-08-16 Westinghouse Electric Corp High-frequency dielectric heating apparatus
US2495415A (en) * 1945-10-17 1950-01-24 Raytheon Mfg Co High-frequency electromagnetic cooking apparatus

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1605164A (en) * 1925-11-20 1926-11-02 Brandwood Joseph Apparatus for the treatment of yarn packages with fluids
US1733147A (en) * 1926-09-09 1929-10-29 Franklin Rayon Corp Method and means for dyeing and otherwise processing rayon
US2037483A (en) * 1930-05-20 1936-04-14 Glanzstoff Courtaulds Gmbh Method of and apparatus for drying artificial silk cakes
US1972050A (en) * 1932-08-08 1934-08-28 Jesse H Davis High frequency method of and apparatus for exterminating insect life in seed or grain or other materials
US2038036A (en) * 1934-01-11 1936-04-21 Louis S Fryer Method and apparatus for treating rayon
US2263681A (en) * 1938-10-19 1941-11-25 United Shoe Machinery Corp Treating rayon cakes
US2304958A (en) * 1940-11-25 1942-12-15 Rouy Auguste Louis Mar Antoine Heating of dielectric materials
US2329188A (en) * 1941-06-19 1943-09-14 Ohio Crankshaft Co Progressive heat treating
US2370624A (en) * 1942-10-01 1945-03-06 Rca Corp Electrical heating method
US2415025A (en) * 1943-04-22 1947-01-28 Firestone Tire & Rubber Co Method and apparatus for treating matter in a high-frequency electric field
US2428969A (en) * 1943-10-11 1947-10-14 Corning Glass Works Glass heating and working
US2433842A (en) * 1944-02-16 1948-01-06 American Viscose Corp Method of drying rayon thread by high-frequency electric currents
US2404191A (en) * 1944-04-22 1946-07-16 British Insulated Cables Ltd Dielectric heating electrode
US2421334A (en) * 1944-04-26 1947-05-27 Ind Rayon Corp Method of treating twisted filamentary materials
US2413003A (en) * 1944-12-11 1946-12-24 Standard Telephones Cables Ltd High-frequency baking apparatus
US2479351A (en) * 1945-08-10 1949-08-16 Westinghouse Electric Corp High-frequency dielectric heating apparatus
US2495415A (en) * 1945-10-17 1950-01-24 Raytheon Mfg Co High-frequency electromagnetic cooking apparatus

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650289A (en) * 1949-08-10 1953-08-25 Westinghouse Electric Corp Dielectric heating
US2740756A (en) * 1951-04-19 1956-04-03 Albert G Thomas Electrical drying system
DE954866C (de) * 1954-07-31 1956-12-27 Erwin Kolaczek Verfahren zum Trocknen hohler Wickelkoerper aus natuerlichen oder kuenstlichen Spinnstoffen durch strahlende Waerme im Vakuum
US2802085A (en) * 1955-11-01 1957-08-06 Modern Plastic Machinery Corp Apparatus for the treatment of plastic materials
US2866063A (en) * 1955-12-28 1958-12-23 Magnetic Heating Corp Drying of yarn by dielectric heating
US3090737A (en) * 1960-02-24 1963-05-21 Rca Corp Plasma heating apparatus and process
US4296294A (en) * 1974-06-01 1981-10-20 Reinhard Mohn Gmbh Method and apparatus for drying and setting the adhesive on books by vaporization of water using RF energy
US4148346A (en) * 1976-06-14 1979-04-10 Scarnecchia O Vincent Method of and apparatus for drying and debarking logs
US4119826A (en) * 1977-04-04 1978-10-10 Champion International Corporation Dielectric heat generator
US4296298A (en) * 1978-06-12 1981-10-20 Raytheon Company Dielectric cooking apparatus
US4672980A (en) * 1980-04-02 1987-06-16 Bsd Medical Corporation System and method for creating hyperthermia in tissue
DE3142172A1 (de) * 1981-10-23 1983-05-05 Siemens AG, 1000 Berlin und 8000 München Trockenanlage fuer faerbespulen in der textilindustrie
EP1753265A1 (en) * 2005-08-08 2007-02-14 Falmer Investments Limited Radio frequency textile drying machine
US20070045307A1 (en) * 2005-08-08 2007-03-01 Falmer Investments Ltd. Radio frequency textile drying machine
US10823502B2 (en) * 2013-08-14 2020-11-03 Whirlpool Corporation Appliance for drying articles
US10533798B2 (en) 2013-08-14 2020-01-14 Whirlpool Corporation Appliance for drying articles
US10837702B2 (en) 2013-08-23 2020-11-17 Whirlpool Corporation Appliance for drying articles
US11459696B2 (en) 2013-08-23 2022-10-04 Whirlpool Corporation Appliance for drying articles
US10323881B2 (en) 2013-10-02 2019-06-18 Whirlpool Corporation Method and apparatus for drying articles
US11029088B2 (en) 2013-10-02 2021-06-08 Whirlpool Corporation Method and apparatus for drying articles
US11686037B2 (en) 2013-10-02 2023-06-27 Whirlpool Corporation Method and apparatus for drying articles
US10816586B2 (en) 2013-10-16 2020-10-27 Whirlpool Corporation Method and apparatus for detecting an energized e-field
US11519130B2 (en) 2013-10-16 2022-12-06 Whirlpool Corporation Method and apparatus for detecting an energized e-field
US10246813B2 (en) * 2013-12-09 2019-04-02 Whirlpool Corporation Method for drying articles
US10655270B2 (en) 2015-03-23 2020-05-19 Whirlpool Corporation Apparatus for drying articles
US11078619B2 (en) 2015-03-23 2021-08-03 Whirlpool Corporation Apparatus for drying articles
US11692298B2 (en) 2015-03-23 2023-07-04 Whirlpool Corporation Method of drying articles

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FR961082A (en(2012)) 1950-05-03
GB642662A (en) 1950-09-06
BE480057A (en(2012))
NL65428C (en(2012))

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