EP3401437B1 - Anti-folds soleplate and iron comprising said soleplate - Google Patents

Anti-folds soleplate and iron comprising said soleplate Download PDF

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Publication number
EP3401437B1
EP3401437B1 EP18169605.5A EP18169605A EP3401437B1 EP 3401437 B1 EP3401437 B1 EP 3401437B1 EP 18169605 A EP18169605 A EP 18169605A EP 3401437 B1 EP3401437 B1 EP 3401437B1
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European Patent Office
Prior art keywords
soleplate
steam
iron
edge
ironing
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EP18169605.5A
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German (de)
French (fr)
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EP3401437A1 (en
Inventor
Francesca Polti
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Polti SpA
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Polti SpA
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Publication of EP3401437A1 publication Critical patent/EP3401437A1/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/38—Sole plates
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/20—Arrangements for discharging the steam to the article being ironed

Definitions

  • the present invention relates to a soleplate for an iron, said soleplate having a particular shape allowing not to create unwanted folds on the fabric during lateral movement of the iron.
  • Irons normally on the market have an ironing soleplate essentially flat, or, sometimes which ends with a 90° or 180° edge having a very narrow radius of curvature, of the order of a few millimetres.
  • a typical problem that occurs during the ironing with a common iron is that, during the lateral movement of the iron, e.g. in perpendicular direction compared to the handle direction, some folds are formed on the fabric. These folds are due to the fact that when the fabric is not properly stretched, during the lateral movement the soleplate pushes it in the same direction of the movement until a fold is created on the fabric, which fold is then ironed. In this way, the obtained result of ironing is just the opposite of the desired one, i.e. folds are formed which are difficult to remove since they are ironed This fact causes a meaningful loss of time while ironing clothes or linen.
  • WO 2010/023141 discloses an iron base of an ironing device comprising an iron base substrate and a base plate made of aluminium and disposed at the bottom of the substrate and connected thereto.
  • the base plate is made of an aluminium sheet and has a thickness of about 0.4 mm; the substrate comprises a lower lateral edge around which an edge area of the aluminium sheet is plastically deformed and thus connected in a shape-locked fashion to the lateral edge.
  • WO 2010/072557 discloses an ironing soleplate device which comprises an ironing device fastening groove on the edge area of said ironing soleplate.
  • the present invention relates to a soleplate for iron having a shape able to significantly reduce unwanted creation of folds during ironing. More generally the present invention relates to an ironing soleplate having improved handling and slipping properties.
  • the soleplate according to the invention is characterized by a conventional shape next to the tip, while, starting from a point not exceeding about the middle of the soleplate, the soleplate itself, preferably, has, next to the edge, a radius of curvature large enough to produce an uplift of the soleplate itself with reference to the ground plane (and thus with reference to the fabric during the ironing) extremely gradual and which would allow smoothing of the fabric, and to avoid the involuntary formation of folds.
  • the present invention is thus related to an iron soleplate having a curved edge on at least 50% of the length of the edge of the soleplate in distal position with respect to the tip, wherein the radius of curvature of the curved edge in the at least 50% of the length of the edge is equal to or higher than 4 mm and wherein the radius of curvature varies in a continuous way from a value lower than 2 mm on the tip to a value equal to or higher than 10 mm on the back end of the soleplate.
  • the projection on the horizontal plane of the curved part of the edge has a length in radial direction (e.g. perpendicular compared to soleplate silhouette) preferably comprised between 4 and 50 mm, more preferably between 5 and 40 mm.
  • the stretch can be shorter near to the tip, where the soleplate length is lower, and can be longer near the soleplate back, where its length is greatest.
  • the radius of curvature can be higher at start to decrease while moving away from the flat stretch of the soleplate.
  • the distance of the same from the ironing surface will be preferably lower than or equal to 5 mm, more preferably lower than or equal to 3 mm, even more preferably lower than or equal to 2 mm.
  • the soleplate according to the invention can be used on whichever type of iron, e.g. no-steam traditional irons, steam irons, boiler steam irons. In any case, the soleplate of the present invention gives the advantage of reducing, where not avoiding folds due to lateral movement of the soleplate.
  • the soleplate of the present invention is used on a steam iron, even more preferably on a boiler steam iron.
  • soleplate manufacturing to obtain its curvature represents an increase of soleplate cost and this is preferably made on a medium-high value iron, such as boiler steam iron.
  • boiler steam iron represents these days the best solution to obtain quickly a good level of ironing.
  • the soleplate according to the invention in addition to a the above described rounded edge, also presents a particular design of the soleplate. In fact, a good distribution of steam under the soleplate helps to increase iron handing during its use.
  • the percentage of pressing portion compared to total surface of soleplate is comprised between 30 and 80%, more preferably between 40 and 75%, even more preferably between 50 and 70%. In said range, the optimal level of ironing will be obtained.
  • the depth of the raised zone can vary within a fairly large range, nevertheless, it has been noted that an optimal depth is preferably comprised between 0.5 and 3 mm, even more preferably between 1 and 2mm.
  • steam holes are present in a not too high number, preferably in a number lower than 25, more preferably in a number comprised between 5 and 23, even more preferably between 7 and 21.
  • a too low number of holes leads to a too concentrated steam flux and to a flux rate not high enough in term of g/min.
  • a too high number of holes leads instead to a stream having a speed and a strength too low for some functions such as vertical ironing.
  • the minimum and maximum number of holes present in the soleplate according to the invention is also correlated to the diameter of holes; in fact, a hole having a diameter of 2x corresponds, in terms of hole surface area, to 4 holes having diameter x.
  • the above values relate to holes having diameter of 2 mm.
  • the steam holes of the soleplate according to the invention are preferably in a number lower than 25, more preferably comprised between 5 and 23, even more preferably between 7 and 21. In fact, a too low number of holes leads to a too concentrated steam flux and to a steam flow not high enough in term of g/min.
  • the steam flux rate is also possible to express the steam flux rate as an inverse function of the total surface area of steam holes.
  • the total surface area of holes is preferably comprised between 15 and 80 mm 2 , more preferably between 20 and 70 mm 2 even more preferably between 35 and 60 mm 2 .
  • an area of total surface of stream holes of 56,52 mm 2 can be obtained with 18 holes having a diameter of 2 mm, with 6 holes having a diameter of 3,46 mm, with 3 holes having a diameter of 4,9 mm or with a single hole having a diameter of 8,49 mm. All these embodiments are comprised in the present invention.
  • the steam iron is able to produce steam at a pressure of at least 3 bar, preferably of at least 4 bar.
  • the most important parameter to evaluate quality of a steam iron is not the quantity of steam produced per minute, but the pressure of the steam itself.
  • the iron produces a large quantity of steam but at a low pressure, steam will become liquid when touching the fabric to be ironed, confronting the user with two possibilities: either stop ironing with a wet fabric, risking mould or bad smell of the same, or to prolong ironing without steam in order to dry the fabric.
  • the iron produces steam to a sufficiently high pressure, i.e. at least 3 bar, even more preferably at least 4 bar, and preferably with a flux rate of at least 70 g/min, more preferably at least 80 g/min, then the ironing will be quick and result in a dry fabric.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Irons (AREA)

Description

  • . The present invention relates to a soleplate for an iron, said soleplate having a particular shape allowing not to create unwanted folds on the fabric during lateral movement of the iron.
  • . Irons normally on the market have an ironing soleplate essentially flat, or, sometimes which ends with a 90° or 180° edge having a very narrow radius of curvature, of the order of a few millimetres.
  • . A typical problem that occurs during the ironing with a common iron is that, during the lateral movement of the iron, e.g. in perpendicular direction compared to the handle direction, some folds are formed on the fabric. These folds are due to the fact that when the fabric is not properly stretched, during the lateral movement the soleplate pushes it in the same direction of the movement until a fold is created on the fabric, which fold is then ironed. In this way, the obtained result of ironing is just the opposite of the desired one, i.e. folds are formed which are difficult to remove since they are ironed This fact causes a meaningful loss of time while ironing clothes or linen.
  • . WO 2010/023141 discloses an iron base of an ironing device comprising an iron base substrate and a base plate made of aluminium and disposed at the bottom of the substrate and connected thereto. The base plate is made of an aluminium sheet and has a thickness of about 0.4 mm; the substrate comprises a lower lateral edge around which an edge area of the aluminium sheet is plastically deformed and thus connected in a shape-locked fashion to the lateral edge.
  • . WO 2010/072557 discloses an ironing soleplate device which comprises an ironing device fastening groove on the edge area of said ironing soleplate.
  • . The present invention relates to a soleplate for iron having a shape able to significantly reduce unwanted creation of folds during ironing. More generally the present invention relates to an ironing soleplate having improved handling and slipping properties.
  • . Particularly, the soleplate according to the invention is characterized by a conventional shape next to the tip, while, starting from a point not exceeding about the middle of the soleplate, the soleplate itself, preferably, has, next to the edge, a radius of curvature large enough to produce an uplift of the soleplate itself with reference to the ground plane (and thus with reference to the fabric during the ironing) extremely gradual and which would allow smoothing of the fabric, and to avoid the involuntary formation of folds.
    • . Fig. 1 shows a view from the bottom of a soleplate according to the invention.
    • . Fig. 2 shows a lateral view of an iron comprising the soleplate of Fig. 1.
    • . Fig. 3 represents a view of Fig. 1, where are the section planes used in following figures are indicated.
    • . Fig. 4 represents the soleplate section according to plane G-G.
    • . Fig. 5 represents the soleplate section according to plane A-A.
    • . Fig. 6 represents the soleplate section according to plane B-B.
    • . Fig. 7 represents the soleplate section according to plane C-C.
    • . Fig. 8 represents the soleplate section according to plane D-D.
    • . Fig. 9 represents the soleplate section according to plane E-E.
    • . Fig. 10 represents the soleplate section according to plane F-F.
  • . The present invention is thus related to an iron soleplate having a curved edge on at least 50% of the length of the edge of the soleplate in distal position with respect to the tip, wherein the radius of curvature of the curved edge in the at least 50% of the length of the edge is equal to or higher than 4 mm and wherein the radius of curvature varies in a continuous way from a value lower than 2 mm on the tip to a value equal to or higher than 10 mm on the back end of the soleplate.
  • . Further, the radius of curvature in a single soleplate section can vary and can be lower in a first section and increase in the second stretch. The increase can be so high as to produce a second stretch of the soleplate that is plane (r= infinity).
  • . The projection on the horizontal plane of the curved part of the edge has a length in radial direction (e.g. perpendicular compared to soleplate silhouette) preferably comprised between 4 and 50 mm, more preferably between 5 and 40 mm. In general, the stretch can be shorter near to the tip, where the soleplate length is lower, and can be longer near the soleplate back, where its length is greatest.
  • . Once the radius of curvature increases, the desired effect of avoiding the creation of folds during lateral movement of the iron become more evident.
  • . Alternatively, the radius of curvature can be variable, i.e. smaller in the first stretch of length in radial direction comprised between 1 and 10 mm, and larger in a second stretch, till possibly it becomes flat (r= infinity). In addition, the radius of curvature can be higher at start to decrease while moving away from the flat stretch of the soleplate.
  • . Generally, at a distance of 5 mm from the start of curved stretch of the soleplate, the distance of the same from the ironing surface will be preferably lower than or equal to 5 mm, more preferably lower than or equal to 3 mm, even more preferably lower than or equal to 2 mm.
  • . The soleplate according to the invention can be used on whichever type of iron, e.g. no-steam traditional irons, steam irons, boiler steam irons. In any case, the soleplate of the present invention gives the advantage of reducing, where not avoiding folds due to lateral movement of the soleplate.
  • . In a preferred embodiment, the soleplate of the present invention is used on a steam iron, even more preferably on a boiler steam iron. In fact, soleplate manufacturing to obtain its curvature represents an increase of soleplate cost and this is preferably made on a medium-high value iron, such as boiler steam iron.
  • . In fact, boiler steam iron represents these days the best solution to obtain quickly a good level of ironing. In order to obtain an increased handing, the soleplate according to the invention, in addition to a the above described rounded edge, also presents a particular design of the soleplate. In fact, a good distribution of steam under the soleplate helps to increase iron handing during its use.
  • . Thus, it is possible to further increase the iron handing through a particular geometry of the soleplate, with the meaning of the opportune combination between pressing portion (which means in contact with the ironing portion) and raised portion, thus having a little height compared to the pressing portion.
  • . It is particularly preferred that on the soleplate the percentage of pressing portion compared to total surface of soleplate is comprised between 30 and 80%, more preferably between 40 and 75%, even more preferably between 50 and 70%. In said range, the optimal level of ironing will be obtained. When calculating the above described ratio, it has to be taken into account just the central portion of the soleplate, disregarding the curved edge of the soleplate itself. The depth of the raised zone can vary within a fairly large range, nevertheless, it has been noted that an optimal depth is preferably comprised between 0.5 and 3 mm, even more preferably between 1 and 2mm.
  • . Besides, in combination with said values of ratio between pressing portion and raised portion, it is preferred that steam holes are present in a not too high number, preferably in a number lower than 25, more preferably in a number comprised between 5 and 23, even more preferably between 7 and 21. In fact, a too low number of holes leads to a too concentrated steam flux and to a flux rate not high enough in term of g/min. A too high number of holes leads instead to a stream having a speed and a strength too low for some functions such as vertical ironing.
  • . It is obvious that the minimum and maximum number of holes present in the soleplate according to the invention is also correlated to the diameter of holes; in fact, a hole having a diameter of 2x corresponds, in terms of hole surface area, to 4 holes having diameter x. Thus, the above values relate to holes having diameter of 2 mm. In this case, the steam holes of the soleplate according to the invention are preferably in a number lower than 25, more preferably comprised between 5 and 23, even more preferably between 7 and 21. In fact, a too low number of holes leads to a too concentrated steam flux and to a steam flow not high enough in term of g/min.
  • . For what previously said, it is also possible to express the steam flux rate as an inverse function of the total surface area of steam holes. In such a case, the total surface area of holes is preferably comprised between 15 and 80 mm2, more preferably between 20 and 70 mm2 even more preferably between 35 and 60 mm2. For example, an area of total surface of stream holes of 56,52 mm2 can be obtained with 18 holes having a diameter of 2 mm, with 6 holes having a diameter of 3,46 mm, with 3 holes having a diameter of 4,9 mm or with a single hole having a diameter of 8,49 mm. All these embodiments are comprised in the present invention.
  • . Furthermore, in a preferred embodiment of the present invention, the steam iron is able to produce steam at a pressure of at least 3 bar, preferably of at least 4 bar. In fact, the most important parameter to evaluate quality of a steam iron, is not the quantity of steam produced per minute, but the pressure of the steam itself. In fact, if the iron produces a large quantity of steam but at a low pressure, steam will become liquid when touching the fabric to be ironed, confronting the user with two possibilities: either stop ironing with a wet fabric, risking mould or bad smell of the same, or to prolong ironing without steam in order to dry the fabric. If, on the contrary, the iron produces steam to a sufficiently high pressure, i.e. at least 3 bar, even more preferably at least 4 bar, and preferably with a flux rate of at least 70 g/min, more preferably at least 80 g/min, then the ironing will be quick and result in a dry fabric.

Claims (8)

  1. Soleplate having a curved edge on at least 50% of the length of the edge of the soleplate in distal position with respect to the tip, wherein the radius of curvature of the curved edge in the at least 50% of the length of the edge is equal to or higher than 4 mm, characterized in that the radius of curvature varies in a continuous way from a value lower than 2 mm on the tip to a value equal to or higher than 10 mm on the back end of the soleplate.
  2. Soleplate according to claims 1 wherein the projection on the horizontal plane of the curved part of the edge has a length in radial direction comprised between 4 mm and 50 mm.
  3. Soleplate according to claim 1-2 wherein the soleplate presents a pressing portion which is in contact with the ironing surface, and a raised portion.
  4. Soleplate according to claim 1-3 wherein the soleplate presents holes for the emission of steam in a number equal to or lower than 25.
  5. Iron comprising the soleplate according to claims 1-4.
  6. Steam iron according to claim 5.
  7. Steam iron according to claim 6, wherein the steam iron is capable of producing steam at a pressure of at least 3 bar, preferably at least 4 bars.
  8. Steam iron according to claim 7, wherein the steam iron is capable of producing steam at a flux rate of at least 70 g/min.
EP18169605.5A 2017-04-27 2018-04-26 Anti-folds soleplate and iron comprising said soleplate Active EP3401437B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102017000045936A IT201700045936A1 (en) 2017-04-27 2017-04-27 Anti-crease plate and iron including said plate

Publications (2)

Publication Number Publication Date
EP3401437A1 EP3401437A1 (en) 2018-11-14
EP3401437B1 true EP3401437B1 (en) 2021-02-17

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EP (1) EP3401437B1 (en)
ES (1) ES2869999T3 (en)
IT (1) IT201700045936A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010072557A1 (en) * 2008-12-23 2010-07-01 BSH Bosch und Siemens Hausgeräte GmbH Ironing soleplate, ironing device having an ironing soleplate, and ironing device set

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603409A1 (en) * 1985-06-05 1986-12-11 Rowenta-Werke Gmbh, 6050 Offenbach ELECTRICALLY HEATED STEAM IRON
US5937552A (en) * 1997-01-10 1999-08-17 Hp Intellectual Corp. Iron soleplate with a soleplate bottom cover
ES2338846B1 (en) * 2008-08-28 2011-02-18 Bsh Krainel, S.A IRON FLOOR, IRONING DEVICE, AS WELL AS PROCEDURE FOR THE MANUFACTURE OF AN IRON FLOOR.
ES2445272B1 (en) * 2012-08-30 2015-01-12 Bsh Electrodomésticos España, S.A. Steam ironing device, steam iron and ironing station

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010072557A1 (en) * 2008-12-23 2010-07-01 BSH Bosch und Siemens Hausgeräte GmbH Ironing soleplate, ironing device having an ironing soleplate, and ironing device set

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IT201700045936A1 (en) 2018-10-27
ES2869999T3 (en) 2021-10-26
EP3401437A1 (en) 2018-11-14

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