US20130333106A1 - Strainers and plugs - Google Patents

Strainers and plugs Download PDF

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Publication number
US20130333106A1
US20130333106A1 US14/001,653 US201214001653A US2013333106A1 US 20130333106 A1 US20130333106 A1 US 20130333106A1 US 201214001653 A US201214001653 A US 201214001653A US 2013333106 A1 US2013333106 A1 US 2013333106A1
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United States
Prior art keywords
strainer
sink
drain
materials
strainers
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Abandoned
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US14/001,653
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English (en)
Inventor
Sharon Ychie
Nir Eylon
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SINK SKIN Ltd
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SINK SKIN Ltd
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Publication of US20130333106A1 publication Critical patent/US20130333106A1/en
Assigned to SINK SKIN LTD. reassignment SINK SKIN LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EYLON, NIR, MR., YCHIE, SHARON, MR.
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/26—Object-catching inserts or similar devices for waste pipes or outlets
    • E03C1/264—Separate sieves or similar object-catching inserts

Definitions

  • the present invention refers to a disposable strainer designed for use in sinks, bathtubs, drains and so on.
  • strainers that are usually made of metal or plastic and are designed to prevent masses of waste from entering the plumbing system. It is customary to manually collect the waste on the strainer, remove the strainer from the drain hole, empty the waste into the garbage can and return the strainer over the sink's drain hole for further use.
  • the need to collect the waste from the bottom of the sink by hands, pile it up on the strainer, remove the strainer, empty the waste into the garbage can, and clean the strainer from pieces of scummy waste that often stick to it, is unpleasant, to say the least, and constitutes a problem for the general public.
  • the present invention offers an appropriate, efficient and inexpensive solution to this problem.
  • U.S. Pat. No. 7,442,296 to Won describes a disposable drain strainer that is removably received within a drain opening having an adjacent drain rim substrate.
  • the strainer has a strainer portion, a ring portion, and a seal release mechanism. Top and bottom surfaces of the ring portion are adapted to sealingly engage the drain rim substrate.
  • the seal release mechanism is integral with the ring portion, and facilitates release of the seal so that the strainer can be readily be removed from the sink and discarded.
  • the strainer is described to preferably have a thickness no greater than 0.091 cm (910 ⁇ m). However, it will occur to the skilled in the art that for various reasons, such be made very much lower than that thickness, for example injection molding cannot make strainers thinner than 400 ⁇ m.
  • One object is to improve the adhesion of strainers to sinks; another to improve the printability of strainers; yet another is to provide strainers that are more efficient; another is to provide strainers easier to produce. Yet another is to reduce the waste of material by making the strainer thinner—than attainable under the limits of production by mold injection.
  • an extra-thin and flexible strainer or plug having a thickness of between 150 and 350 ⁇ m is provided.
  • a sink/bath comprising: a surface; a drain, and a strainer or plug, the strainer or plug configured to fit over the sink's/bath's drain and adhere to the sink/bath surface adjacent to the drain, the strainer characterized as having a rim extending to at least 10 mm onto the sink/bath surface is provided.
  • a strainer or plug comprising a circumferential ring, a middle concave part and a circumferential side is provided, the ring characterized as being at least 15 mm wide.
  • the strainer or plug may be configured for single use or for a small number of uses.
  • the strainer or plug is preferably made of a material that self-adheres to a wet sink surface.
  • Preferred embodiments further comprise at least one lifting tab.
  • Some embodiments further comprise materials that can be printed upon.
  • Some strainer embodiments further comprise tiny protrusions in the perforated bottom of the strainer's middle part.
  • Some embodiments are configured to exude a fragrance.
  • Some strainer embodiments are composed of one or two strainers that are positioned one over the other and are joined in a way that enables them to be rotated in relation to one another.
  • Some strainer embodiments have two tabs are opposite each other.
  • Some strainer embodiments with tabs have the tabs are marked to allow easily identifying the tabs.
  • the tabs are configured to allow breaking the adherence of the strainer or plug to the sink/bath surface.
  • strainer embodiments comprise recyclable or recycled materials.
  • Some strainer embodiments comprise materials selected from a group comprising PLA, PET, PP and PS, with the proviso that the materials exclude materials that lose mechanical strength within hours of contact with liquid.
  • strainer embodiments further comprise a material that catalyzes or facilitates decomposition or degradation of the strainer or plug.
  • embodiments are produced by vacuum forming/thermo-forming.
  • the extra thin strainer embodiments comprise a circumferential ring at least 10 mm wide.
  • Some embodiments are made of material that is sufficiently flexible to allow picking the strainer or plug as a sack.
  • the strainer rim is sufficiently wide to prevent refuse from falling in a sink's drain when the strainer is removed from the sink.
  • the rim is sufficiently wide to collect refuse not reaching a sink's/bath drain when the strainer is placed over the drain.
  • all surfaces of the plug or strainer are printed.
  • vacuum forming/Thermoforming a strainer or plug is provided.
  • a sink/bath comprising: a surface; a drain, a metal cover and a strainer or plug, the strainer or plug configured to fit over the sink's/bath's drain and adhere to the sink surface adjacent to the drain, the strainer characterized as having a rim extending to at least 15 mm beyond the metal cover.
  • Some embodiments further comprise OXO.
  • Some strainer embodiments have a ring at least 20 mm wide.
  • FIG. 1 depicts a perspective view of a strainer that is composed of a circumferential ring with a lifting tab, and a concave middle part that is composed of a circumferential vertical side and a bottom with perforations;
  • FIG. 2 shows the strainer of FIG. 1 in a view from above
  • FIG. 3 illustrates the strainer of FIG. 1 in a side view, showing the lifting tab on the left;
  • FIG. 4 shows the same strainer, viewing the lifting tab as facing into the page
  • FIG. 5 depicts in perspective view a strainer with additional protrusions designed to help trap waste and prevent it from going down the drain;
  • FIG. 6 shows the strainer of FIG. 5 in a cross-section side view
  • FIG. 7 depicts a side view of a double strainer made up of one perforated strainer and a conforming plug
  • FIG. 8 illustrates separation of the perforated strainer and plug of the double strainer
  • FIG. 9 schematically shows a side view of a double strainer made of two perforated strainers
  • FIG. 10 shows a side view of the strainer depicted in FIG. 9 , in which liquid passes via the strainer;
  • FIG. 11 shows a top view of the bottoms of the two perforated strainers depicted in FIG. 9 , in which liquid may pass via the strainer;
  • FIG. 12 shows a top view of the bottoms of the two perforated strainers depicted in FIG. 9 , in which liquid may not pass via the strainer;
  • FIG. 13 a shows a roll of plastic film for forming strainers
  • FIG. 13 b shows the heating of a plastic film in a vacuum forming/Thermoforming system
  • FIG. 13 c shows the plastic film start to deform in the vacuum forming/Thermoforming system
  • FIG. 13 d shows the plastic film brought into contact with a vacuum mold in the vacuum forming/thermoforming system
  • FIG. 13 e shows the vacuum formed sheet in the shape of a strainer on the mold
  • FIG. 13 f shows the strainer separated from the mold.
  • strainers and plugs are provided.
  • strainer embodiments are described hereinbelow, except for some specific examples of plugs.
  • the description below of strainers thus is to be applied mutatis mudandis to plugs, unless a particular description of plugs is explicitly described following regarding those strainer embodiments.
  • the strainers are designed to be used over the drain holes of sinks, bathtubs, and so on.
  • the strainer embodiments 1 in FIGS. 1 to 4 are intended to be used once or a small number of times at the most and have the general composition of a circumferential ring 2 and a middle part 3 with perforations 6 .
  • the circumferential ring 2 constitutes the external rim of the strainer 2 and has the general shape of a flat, closed ring.
  • the middle part 3 can be flat (particularly for use over drain holes in showers that have a metal lattice in the floor), concave or convex, and it can have a circumferential vertical side 4 and a bottom 5 with perforations 6 so as to form a general structure of a cylindrical or dome-like bowl.
  • the circumferential side 4 can be vertical if the middle part has the general shape of a cylinder or it may be curved if the middle part has the general shape of a dome.
  • the middle part 3 can be either convex or concave.
  • the strainer 1 is made of one integral piece.
  • the external diameter of the circumferential ring 2 is such as to essentially prevent waste falling into the drain when the strainer is picked up, as well as allow prolonged adhesion of the strainer to the sink surface when the trainer is placed on the sink drainage hole.
  • the external diameter of the strainer/plug is generally variable, for example about 135 mm in sinks with drain holes of 85 mm that have a metal cover of 105 mm, although it may be larger or smaller, provided the adhesive property of the strainer 1 is retained: all other parameters being equal, the larger the circumferential ring 2 , the stronger the adhesion of the strainer 1 , as will be explained later on in the application.
  • the ring is typically at least 15 mm wide so as to extend and contact at least 10 mm onto the sink or bathtub's surface: in many sinks there is a depression of a few mm surrounding the sink's drain, and the ring has to span and extend beyond this depression well onto the surface, and thus strainers, more particularly for sinks, preferably have a somewhat wider width of at least 20 mm, whereas plugs for baths without such depressions may have a smaller diameter.
  • the diameter of the middle part 3 corresponds, in general, to the dimensions of the drain holes the strainer 1 is intended to be used over.
  • the depth of the middle part 3 (if it is concave) or its height (if it is convex) can range from 40 mm deep to 10 mm high, although other dimensions are also possible.
  • the strainer 1 is very thin, preferably less than 400 microns thick and down to about 150 ⁇ m or less, dependent upon the strength of the material from which the strainer is made.
  • the material has to be sufficiently thick to allow detaching the strainer from the sink surface and picking up the strainer loaded with refuse, without tearing or collapsing.
  • this novel minimal thickness enables the strainer 1 to be highly flexible.
  • the unique structure of the strainer 1 enables both very efficient, fast and very inexpensive manufacture, being manufactured from a much reduced amount of material compared to strainers made by injection molding, conserving storage and shipping space. The environmental impact of the product is thus much reduced both in manufacture and in disposal.
  • the fact that the strainer 1 is extra-thin and/or has a wide rim may enhance its adhesion, as will be explained later on.
  • the strainer 1 can self-adhere upon contact with water. This property of the strainer 1 stems, among other things, from the type of materials used to manufacture it, its overall design, e.g. flexibility (from material and thickness) and surface area of the rim, and the unique property of water molecules that results in the creation of attraction and adhesion forces.
  • the strainer 1 is made of a polymeric material, preferably of a type that is not mechanically compromised by short period wetting such as recycled and recyclable HDPE, PLA, PS, PP or PET with or without additives, including OXO, which is used to catalyze the biodegradation of the material. Paper is generally unsuitable, as it will lose its mechanical strength within minutes of becoming wet.
  • All of the above materials can be supplied in extra thin sheets and extremely flexible and can be folded rapidly and efficiently. Most importantly, all of the above materials can self-adhere, such that when the strainer 1 [or more accurately, the circumferential ring 2 ] is placed on a sink surface and/or bathtub surface and/or basin surface with a drain hole and/or on the circumferential ring of the drain hole itself (hereinafter referred to as the “basin surface”), the strainer adheres efficiently to the basin surface thanks to the moisture captured between the underside of the circumferential ring 2 and the surface of the basin surface. The adhesion occurs, among other things, thanks to the vacuum created between the underside of the circumferential ring 2 and the surface of the basin, and also due to the fact that water penetrates between the two surfaces, causes attraction and adhesion forces between them.
  • the circumferential ring 2 is relatively large and its external diameter should preferably be significantly greater than that of the drain hole, i.e. at least 10 mm wider, so that its contact area with the basin surface is large enough to create effective adhesion.
  • the strainer 1 is positioned firmly over the drain hole and does not shift. This adhesion is caused not only due to the weight and geometry of the strainer (in that the concave part fits into the drain hole) but also due to the properties and structure of the strainer and the properties of the water.
  • the wide rim of the strainer 1 also enables the user to accumulate a greater quantity of waste and dirt on it, and the fact that the strainer 1 is extra thin and flexible also enhances the effectiveness of its adhesion.
  • the wide rim also helps prevent from refuse falling into the drain when the strainer is lifted off the sink surface. It should be appreciated that commercially available strainers that are not as wide are precarious, as they expose the sink to blockages due to inadvertent spillage of waste into the drain during their manipulation.
  • the strainer 1 can be round, elliptic, or have any other geometric shape. As mentioned, the middle part 3 of the strainer 1 has perforations 6 and is designed to be positioned over the drain hole. The strainer 1 enables water to flow through the perforations 6 into the drain, whereas the waste is stopped and accumulates on the strainer 1 .
  • the strainer 1 can be equipped with one or more lifting tab 8 to facilitate its removal in order to discard it into a garbage can along with the waste accumulated on it as well as to help lift the strainer off the sink surface.
  • the tabs themselves may be made of printable material, and be printed upon or highlighted, either in part or over their entire surface, to help a user locate the tabs.
  • the material the strainer 1 is made of can be of a type that can be printed on, in which case the strainer 1 may serve as advertising space, (for instance for detergents, or kitchen products) or have some aesthetic print on it.
  • the material of the strainer 1 is made or can contain or have a coating containing a fragrance.
  • a strainers such as 1 ′ shown in FIGS. 5 and 6 have tiny protrusions 7 on the bottom 5 of the middle part 3 ′ so that the waste is caught on the protrusions and accumulates on them, creating an empty pocket between the waste and the strainer base, and preventing the perforations 6 from being clogged. In this way, water can flow freely through the perforations 6 into the drain hole even when waste has accumulated on the strainer 1 ′ and thus improves drainage.
  • the protrusions also improve the trapping and capture of the waste and prevent it from getting washed down the drain.
  • FIGS. 7 to 12 Other embodiments refer to double strainers 10 , 10 ′ shown in FIGS. 7 to 12 that are made up of two strainers of the kind described above or a strainer above a plug.
  • a strainer 12 is placed over a plug 14 .
  • a strainer 12 is placed over another strainer 12 ′.
  • the two strainers 12 , 12 ′ are placed one on top of the other and their centers are joined together in such a way that they can be rotated in relation to one another.
  • FIGS. 10 and 11 water can flow freely from the basin into the drain hole.
  • one of the two strainers 1 can be rotated slightly so that the perforations 6 on the two strainers are not aligned and an impervious surface is formed, as in FIGS. 9 and 12 .
  • the double strainer 10 serves as a kind of stopper or plug, preventing water from flowing down the drain.
  • the double strainer 10 can thus serve both as a strainer and as a stopper for the relevant basin according to need.
  • the double strainer 10 ′ is less likely to drip when it is removed and discarded along with the waste accumulated on it.
  • the double strainer 10 can be composed of two separate parts—one strainer 1 with perforations 6 and a second “strainer” 1 without perforations that serves as a stopper.
  • the double strainer minimizes dripping of liquids from the strainer during the extraction of the strainer from the sink and transfer of the detritus to the rubbish bin.
  • the lifting tab in these embodiments span the centre of the strainer, to allow a larger surface area to be available for contact between the rim and the sink surface and thus maintain a complete seal and prevent seepage of water to the drain.
  • the strainer 1 may be used as follows: The user places the disposable strainer over the drain hole. The presence of residual water causes the strainer to self-adhere to the sink and prevents it from moving from its position over the drain hole. The user can collect the waste on the strainer, and if necessary, fold it so that it envelopes the waste and discard it into the garbage can along with the waste that is in it. In this sense, the strainer is disposable. When the strainer is used over a bathtub drain it can save the user the unpleasant task of collecting and removing hair that is caught in the drain's permanent lattice or in the drain hole itself.
  • the strainer may also be used over floor drain holes (usually located in the bathroom floor) when the floor is being washed and the wash water is drained through the said drain hole.
  • floor drain holes usually located in the bathroom floor
  • FIG. 13 a shows an extra thin sheet of printable polymeric material, typically thinner than about 350 ⁇ m.
  • plastic utensils are manufactured by injection molding or Vacuum forming/ Thermoforming (herein below abbreviated as VF).
  • the thinness much improves the adhering strength of the strainers, allowing them to stay in place even under a very strong stream of water.
  • the increase adherence is due in part to the increased flexibility of the strainer that allows the strainer to better conform to every minute feature of the sink's surface.
  • the increased adherence as well as the extra thinness also allows washing the detritus in a relatively strong stream of water onto the strainer, whereas thicker strainers have more limited adhesion and form a physical barrier due to their height above the sink surface.
  • VF Another advantage consequent to manufacture by VF is the ability now open to print over the entire surface of the strainer by simpler, cheaper and faster technologies, including the concave part, walls, contours, tabs etc on a sheet's surface, possibly with unique designs, advertisements and/or uniquely designed strainers), whereas injection molding only allows printing on the rim or the bottom of the strainer (to be precise—only on flat surfaces) or very slow and complex printing by technologies suitable for printing on 3D objects.
  • the larger printable surface allows printing content that would be impossible to create in injection-molded strainers.
  • an extra thin plastic sheet 2110 is typically decorated or printed upon (not shown). before being placed in a VF system 2300 .
  • the VF system comprises a vacuum block (mold) 2330 having suction holes 2340 , heating element 2350 , sheet holders 2360 and vacuum machine 2370 .
  • the sheet 2110 becomes pliable, FIG. 13 c .
  • the sheet 2110 is then lowered to the vacuum block 2330 , FIG. 13 d .
  • a vacuum is then applied via the suction holes 2340 , upon which the sheet 2110 conforms to the shape of the vacuum block 2330 , FIG. 13 e .
  • the formed sheet 2110 is raised from the block 2330 , FIG. 13 f , and removed from the VF system.
  • the formed sheet may now be perforated to form a strainer, or may remain un-perforated to be a plug.
  • hydrophobic materials for example polymers such as polypropylene and polystyrene
  • Some hydrophobic materials might adversely affect the adhering strength of the strainers to the sink surface since they repel water and thus do not strongly adhere to the water as hydrophilic materials do.
  • Some materials might have a low specific-gravity, lower than water's, that may interfere with adherence. Nevertheless, the strainers and plug shave been found to have excellent adherence even with these materials, thanks to either/or the wide rims, the thinness and the flexibility of the material.
  • a flip side of the hydrophobicity is that the upper surface of the strainer repels water, which facilitates removal of the strainer without drips and may decrease the adhesion of the wet offal to the surfaces of the strainer.
  • the strainer embodiments have a rim that extends beyond the cover to the ceramic or metal surface of the sink itself.
  • the extension to the surface of the sink is particularly important in ceramic sinks, since it has been found that the strainers made of hydrophobic materials adhere better to wet ceramic surfaces than to wet metal surfaces.
  • the strainer rim extends in such drains to at least 10 mm beyond the cover.
  • the strainer 1 constitutes an efficient and inexpensive solution to the aforementioned problems and offers one or more of the many advantages, as follows: (a) Due to the strainer's wide rims in some embodiments, a larger amount of waste may be accumulated on it. (b) Use of the disposable strainer avoids the need, the trouble, and the unpleasantness of emptying the waste into the garbage can and rinsing the strainer before reusing it, as in the case of the standard strainer. (c) Using the disposable strainer is convenient, efficient, and more hygienic. The wide rim and its thinness allow efficient flow of refuse into the concave part and to accumulate a large quantity thereon. All these qualities help to minimize and ease any dealing with the rubbish.
  • the lifting tabs at or near the edges of the rim which allow minimal contact with the detritus, facilitate cancellation of adhesion and enable easily picking up the strainer.
  • the wide rim minimize invasion of refuse not stacked on the strainer into the drainage system, during disposal of the rubbish (optionally together with the very thin strainer).
  • the wide rim can be used for unique prominent advertisements, decoration etc.
  • the thinness in some embodiments allows printing on the entire surfaces of the strainer. Typically, only the top surface is printed. Such printing is not present or feasible in commercially available strainers.
  • the strainer 1 When the invention is implemented on bathtubs and floor drains holes (usually located in bathroom floors), the strainer 1 , subject of the invention, constitutes an efficient way of preventing waste from entering the plumbing system. (i) Most importantly, the strainer 1 self-adheres to surfaces upon contact with water, having a wide rim and/or being very thin and very lightweight, and so adheres well to the surface around the drain hole.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Closures For Containers (AREA)
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US14/001,653 2011-02-28 2012-02-28 Strainers and plugs Abandoned US20130333106A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IL21145211 2011-02-28
IL211452 2011-02-28
PCT/IL2012/050062 WO2012117400A2 (en) 2011-02-28 2012-02-28 Strainers and plugs

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US20130333106A1 true US20130333106A1 (en) 2013-12-19

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US (1) US20130333106A1 (de)
EP (1) EP2681368A4 (de)
JP (1) JP2014512464A (de)
KR (1) KR20140000142U (de)
CN (1) CN205035869U (de)
CA (1) CA2827815A1 (de)
WO (1) WO2012117400A2 (de)

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US20150218786A1 (en) * 2014-01-08 2015-08-06 Saundra Sue CULLEN Sink insert with cleaning surface
DE102016217716A1 (de) 2016-09-16 2018-03-22 Siemens Aktiengesellschaft Ablaufsieb für ein Waschbecken
CN109958181A (zh) * 2017-12-26 2019-07-02 南京工程学院 一种浴室便捷处理头发丝装置
USD990256S1 (en) * 2021-08-11 2023-06-27 Ziqin Huang Oil strainer
USD992368S1 (en) * 2021-07-12 2023-07-18 Helen Of Troy Limited Strainer

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JP6281031B2 (ja) * 2014-07-28 2018-02-14 秀美 岡田 男性用節水小便器
JP6626772B2 (ja) * 2016-04-12 2019-12-25 日立グローバルライフソリューションズ株式会社 洗濯機
JP2017227102A (ja) * 2016-06-20 2017-12-28 株式会社エイ・ティ・エル 流し台排水口用使い捨て式ごみ受け
CN107447824B (zh) * 2017-08-09 2019-07-12 江门市宝佳厨卫有限公司 一种用于厨房水槽的过滤单元
KR102264471B1 (ko) * 2019-08-08 2021-06-11 김원석 욕실 바닥 배수구용 거름망
CN113181696B (zh) * 2021-05-07 2022-09-23 威海沃尔威体育休闲用品有限公司 一种防堵塞滤网
KR102668213B1 (ko) * 2022-09-08 2024-05-21 김원석 물마개 겸용 배수구 거름망

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Publication number Priority date Publication date Assignee Title
US20150218786A1 (en) * 2014-01-08 2015-08-06 Saundra Sue CULLEN Sink insert with cleaning surface
DE102016217716A1 (de) 2016-09-16 2018-03-22 Siemens Aktiengesellschaft Ablaufsieb für ein Waschbecken
WO2018050405A1 (de) 2016-09-16 2018-03-22 Siemens Aktiengesellschaft Ablaufsieb für ein waschbecken
US10844583B2 (en) 2016-09-16 2020-11-24 Siemens Mobility GmbH Drain sieve for a washbasin
CN109958181A (zh) * 2017-12-26 2019-07-02 南京工程学院 一种浴室便捷处理头发丝装置
USD992368S1 (en) * 2021-07-12 2023-07-18 Helen Of Troy Limited Strainer
USD990256S1 (en) * 2021-08-11 2023-06-27 Ziqin Huang Oil strainer

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EP2681368A2 (de) 2014-01-08
CN205035869U (zh) 2016-02-17
WO2012117400A2 (en) 2012-09-07
EP2681368A4 (de) 2016-09-14
WO2012117400A3 (en) 2013-06-13
JP2014512464A (ja) 2014-05-22
KR20140000142U (ko) 2014-01-08
CA2827815A1 (en) 2012-09-07

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