WO2019060910A2 - Système de remplacement de drap - Google Patents

Système de remplacement de drap Download PDF

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Publication number
WO2019060910A2
WO2019060910A2 PCT/US2018/052715 US2018052715W WO2019060910A2 WO 2019060910 A2 WO2019060910 A2 WO 2019060910A2 US 2018052715 W US2018052715 W US 2018052715W WO 2019060910 A2 WO2019060910 A2 WO 2019060910A2
Authority
WO
WIPO (PCT)
Prior art keywords
mattress
fabric
sheet system
zipper
replaceable sheet
Prior art date
Application number
PCT/US2018/052715
Other languages
English (en)
Other versions
WO2019060910A3 (fr
Inventor
Siddhant Anish DOSHI
Aaron S. Haleva
Original Assignee
Doshi Siddhant Anish
Haleva Aaron S
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Doshi Siddhant Anish, Haleva Aaron S filed Critical Doshi Siddhant Anish
Publication of WO2019060910A2 publication Critical patent/WO2019060910A2/fr
Publication of WO2019060910A3 publication Critical patent/WO2019060910A3/fr
Priority to US16/829,773 priority Critical patent/US20200288888A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/02—Bed linen; Blankets; Counterpanes
    • A47G9/0238—Bed linen
    • A47G9/0246—Fitted sheets
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/10—Loose or removable furniture covers
    • A47C31/105—Loose or removable furniture covers for mattresses

Definitions

  • Embodiments of the present disclosure relate to mattress and bedding technologies, and in particular to a fitted sheet replacement system.
  • Standard fitted sheets have a complex shape that is designed to cover both the top and sides of a mattress, and then overhang or protrude to some extent on the underside of the mattress (known as being "tucked in underneath").
  • standard fitted sheets have several problems. For example, a simple movement on top of the bed often results in the portion of the fitted sheet that protrudes under the mattress becoming dislodged and untucked. When this occurs, the entire sheet loosens, which results in a crinkled look on the sides and top of the bed as the sheet gradually loses its tautness. Additionally, the corners of the fitted sheet tend to pop off the corners on the underside of the mattress. Finally, in order to change bedsheets, the entire mattress needs to be lifted off of its box spring or other support, which is cumbersome, one corner at a time.
  • Figures 1 A through 1 D illustrate several problems of conventional fitted sheets.
  • Figures 2A through 2F illustrate example fitted sheets with trapezoidal shaped sides, and how they stretch from top to bottom on each side, for two example mattress thicknesses, in accordance with various embodiments.
  • Figure 3 illustrates an example two piece fitted sheet connected by a zipper, in accordance with various embodiments.
  • Figure 4 illustrates an exploded view of a two part fitted sheet, attached by a zipper, as fit over a mattress, in accordance with various embodiments.
  • Figure 5 illustrates use of both a stretchable zipper and stretchable fabric, in a compression fit, in accordance with various embodiments.
  • Figure 6 illustrates an example fitted sheet being applied, and as it sits after being attached to a mattress, in accordance with various embodiments.
  • Figure 7 illustrates an example user attaching an upper surface of an example replacement sheet system to a side panel already anchored on a mattress, in accordance with various embodiments.
  • Figure 8 illustrates the example fitted sheet of Figure 7, once the upper surface has been fully attached, in accordance with various embodiments.
  • Figure 9 illustrates a close up view of the covered zipper of the fitted sheet of Figure 8, in accordance with various embodiments.
  • Figure 10 illustrates the close up view of Figure 9, after the fabric flaps covering the zipper have been partially opened thus exposing the hidden zipper, in accordance with various embodiments.
  • Figure 1 1 illustrates a pocket provided on a side panel of the fitted sheet of Figure 8, to hold electronic or other devices, in accordance with various embodiments.
  • Figure 12 illustrates another view of a bed side pocket, in accordance with various embodiments.
  • Figure 13 illustrates manipulating a zipper using a zipper pull attachment on the example fitted sheet of Figure 8, in accordance with various embodiments.
  • Figure 14 depicts an underside view of an exemplary mattress on which the side portion of a fitted sheet has been attached, in accordance with various embodiments.
  • Figure 15 depicts a perspective view of the mattress of Figure 14 with side panel of fitted sheet attached, in accordance with various embodiments.
  • Figure 16 depicts a view of the entire underside of the mattress with side panel attached of Figures 15 and 16, in accordance with various embodiments.
  • Figure 17 depicts the upper surface of an example mattress with the side panel of a fitted sheet ready for attachment to an upper portion of the fitted sheet, in accordance with various embodiments.
  • Figure 18 depicts near full attachment of the upper portion of the fitted sheet to the side panel of Figure 17, in accordance with various embodiments.
  • Figure 19 depicts an enhanced example replacement sheet system in accordance with various embodiments.
  • Figures 20A and 20B illustrate a comparison of conventional fitted sheet dimensions and shape, with that of trapezoidal shape side panels, in accordance with various embodiments.
  • Figures 21 A and 21 B illustrate an example zip-on sheet in the process of attachment to a side sheet and mattress protector assembly, in accordance with various embodiments.
  • Figures 22A and 22B illustrate the relationship between the surface area of an exemplary zip-on sheet, to the surface area of an upper plane of an example mattress, in accordance with various embodiments.
  • Figure 23 illustrates how an example zipper lays on the peripheral edge of a mattress, and is hidden from sight by the short flaps respectively provided on each of the top sheet and the side sheet portion, in accordance with various embodiments.
  • Figure 24 depicts an example zipper toggle, used to zip and unzip the top sheet form the side sheet portion, in accordance with various embodiments.
  • a replaceable sheet system includes an upper portion to cover a sleeping surface of a mattress, and a lower portion, to anchor to the mattress.
  • the upper portion is releasably attached to the lower portion, and the lower portion anchors to the mattress in a compression fit.
  • the upper portion and the lower portion may be releasably attached by a zipper, which may be covered by fabric.
  • each of the upper and lower portions include a short flap, which together cover the zipper when the upper and lower portions are zipped together.
  • phrase "A, B, and/or C” means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B and C).
  • a fitted sheet in accordance with various embodiments has an "upper” or “top” portion, which lays on the top, substantially planar horizontal surface of a mattress, where people sleep or recline, and also has a “side” portion, which attaches to the substantially vertical sides of a mattress, and which further has additional fabric that is said to "tuck” or protrude underneath the bottom surface of the mattress.
  • the four side panels may be referred to as a side panel or "ring" around the mattress.
  • Figure 1 A illustrates how, after a brief period of use, normal movement by persons lying or sitting on top of a bed may result in an untucking of the portion of the fitted sheet that extends under the mattress so as to securely wrap around the corners of the mattress.
  • Such motions by bed users often also result in wrinkling of the fitted sheet, due to the now loose fabric on its side panels that resulted from the untucking.
  • the untucking necessarily results in a loosening of the fitted sheet relative to the mattress, and further results in a crinkled look on the sides and top of the sheet, as the sheet gradually loses more and more of its tautness.
  • Figure 1 B illustrates the difficult steps required to fold a standard fitted sheet, due to the four rounded corners, as a result of which the fitted sheet is not a planar piece of fabric.
  • the fitted sheet is flattened, with its side panel portion folded down, and sitting on top of the underside of its upper portion.
  • the sequence of steps to fold the fitted sheet are depicted from left to right in three rows of images.
  • the sheet is folded over once, to generate the horseshoe look of the top center image.
  • the horseshoe configuration is tri-folded, as shown, to obtain the envelope looking configuration shown at the middle right and bottom left images. This tri-fold is then folded in half from right to left to obtain the final folded version shown at the bottom right image of Figure 1 B.
  • Figure 1 C illustrates how corners of a conventional fitted sheet tend to pop off the corresponding corners of a mattress to which the fitted sheet may be attached. Moreover, in order to change the fitted sheet, it is necessary to lift up each corner of the mattress. If a bed is placed in a corner of a room, then a person must sit on the bed, bend the mattress upwards and engage in what are often awkward movements. Even these measures are often in vain, as the sheet cannot be fully tucked under the mattress, and thus the tuck must be repeatedly adjusted, as shown in Figure 1 D.
  • the surface area ratio of sheet to mattress may be set to remain less than or equal to 1 , and so remain. In embodiments, this may be achieved by using a stretchable fabric, which, in such embodiments, stretches and thereby "hugs” the mattress which it covers. Because a stretchable fabric is flexible, a “shrink fit” or “compression fit” occurs, which preserves the requisite 1 : 1 surface area ratio when stretched, and thereby achieves perfect coverage.
  • the tension due to the fabric stretching to fit an actual mattress may slightly compress the mattress.
  • the interaction of the compressive force from the sheet, and a reactive expansive force from the mattress operate to hold the bed sheet in place despite movement on the top of the bed.
  • additional functionality may be provided, including: an array of sizes required to fit the vast array of mattresses used, composition of the stretchable fabric, and the manner in which the fabric is used.
  • a fitted sheet may comprise a fabric blended with between 5-25% of a stretchable fiber component.
  • the stretchable fiber content may be a synthetic fiber such as, for example, Spandex, Lycra or elastane, or equivalent polyether-polyurea copolymer.
  • Such a fabric composition eliminates wrinkles on the upper surface of the fitted sheet, and may minimize them on the sides.
  • two separate fabrics may be used, attached, for example, along the perimeter of the upper surface of the mattress, so that the respective fabrics used for the sleeping surface of the sheet, and the portion of the fitted sheet covering the sides of the mattress, are different.
  • This approach inter alia, separates the forces on the upper surface of the sheet from those acting on the side surfaces.
  • the upper portion and the side panel in embodiments, may be attached by a zipper, as noted below.
  • a lateral (with respect to the side panel) compression may be created that would diffuse longitudinal forces resulting from movement on the top of the bed.
  • anchoring forces of the sheet due to compressive tension in the sides of the sheet negate and overcome any forces pulling the sheet out from its tucked in position under the mattress.
  • a side fabric composition may comprise any bedding fabric, such as, for example, polyester, cotton, tencel and linen, and the weave pattern may be, for example, percale, sateen, basket weave or twill, woven with between 1 -20% of a stretchable fiber, such as, for example, Lycra®. It is noted that a four-way stretch fabric is less ideal, as this may would counter the forces at work to pull the sheets down and maintain the inner perimeter of the bottom surfaces of the sheet on the underside of the mattress (as shown in Figures 14 through 16, described below).
  • a four-way stretch fabric may be used if the fabric is woven such that stretching is stronger in the lateral direction (i.e., parallel to the floor) than it is in the vertical direction (i.e., perpendicular to the floor).
  • a top or upper portion of the fitted sheet need not be blended with stretchable fibers, in which case it may be pre-shrunk by either washing or by mercerizing during processing of the fabric. It is noted that while every fabric shrinks to a different degree, washing the sheets once ensures that most of the shrinkage is avoided later; it being understood that fabrics
  • any knitted fabric which may in some embodiments be knitted with Lycra®, or any woven fabric blended with Lycra® (any percentage greater than 1 %) may be used.
  • a taper is introduced on the side panels of the sheet, as shown in Figure 2.
  • the width of each side panel decreases from top to bottom.
  • this tapering anchors the side portions of the sheet onto the side portions of the underlying mattress, and also manages aesthetics by keeping the tucked portion of the sheet underneath the mattress in position, thereby avoiding the problem illustrated in Figures 1 A and 1 C.
  • the "taper” is understood to mean a decrease in overall perimeter size around the four side panels from the upper seam, where the side panels attach to the upper portion of the fitted sheet to the bottom of the side panels.
  • This design minimizes triangular overlap that may occur in conventional fitted sheets at the four corners on the underside of the mattress when the four side panels are tucked in.
  • tapering insures that the lateral compression on the sides is greater than any stretch on the upper surface of the sheet, thus facilitating the anchoring of the sheet on the side panels of the mattress.
  • This anchoring both keeps a zipper attaching the upper potion to the side panel at the right height (top of the side panels), and also avoids the side portions of the sheet from being pulled upwards from under the bed.
  • Figures 2A through 2F illustrate example fitted sheets with trapezoidal shaped sides, and how they stretch from top to bottom on each side, for two example mattress thicknesses, in accordance with various embodiments.
  • the left panels of Figure 2 illustrate an example fitted sheet side panel attaches to a thicker mattress, and the right panels of Figure 2 illustrate a similar example fitted sheet attached to a thinner mattress.
  • the side panels are actually not rectangular, but rather trapezoidal. Using trapezoidal shaped side panels, where the length of each side decreases from top to bottom, solves many problems. This is because every vertical level below the edge of the mattress is compressed, and thus stays in place.
  • the "trapezoids" may act as a compensating mechanism for varying heights of mattresses used in different contexts. As the thickness of a mattress used with the fitted sheet increases, the area of the portion of the sheet on the underside of the mattress, for example, as shown in Figures 2A and 2D, lessens, and thus stretches to fill the additional rectangular areas of the now deeper sides of the mattress. This is illustrated in Figures 2A and 2D, where Figure 2A shows an underside or tucked portion 2120 of an example of a fitted sheet used with a thicker mattress, and Figure 2D shows the underside or tucked portion 2120 of an example fitted sheet used with a thicker mattress.
  • FIGS. 2B and 2E there are two respective boxes showing a set of parallel arrows.
  • the solid arrows in each box represent a relaxed or natural width of the sheet side panel, and the dotted portions of the arrows represent stretched portions of the sheet side panel. The lower the vertical position of the arrow, the shorter the width, and thus the greater the stretch.
  • the upper portion which, in embodiments, is zipped to the stretchable sides, will also remain in place at the top, thus creating a sheet system that minimizes or even eliminates wrinkling. In embodiments, this reduces the frequency with which one needs to fix or make their bed.
  • a fitted sheet may use two separate fabrics, one for the removable top portion, the other for the side panels and underside portions.
  • alternative methods of joining the two fabrics may be used.
  • a zipper attachment is used to join the two portions, instead of merely sewing them together, the need to remove the entire sheet for washing would be eliminated. This is because in most instances only the top sheet need be laundered or cleaned, and if it may be unzipped and replaced, convenience and efficiency are maximized.
  • a zipper provided at the upper perimeter of the side panels, where it joins the upper or top portion of the sheet will stay securely in place at the outer perimeter of the mattress, and not fall under its own weight.
  • a compressive side panel with removable top surface mechanism makes it easy to change sheets when the beds are up against walls or provided in corners, and also reduces the effort required in doing so, as the mattress does not need to be lifted during a change of only the upper portion of the sheet. In embodiments, this greatly speeds up the process of changing sheets.
  • a zipper may or may not be stretchable.
  • stretchability counters the fact that even standard sized mattress have an inherent variance in their construction. It is noted that such an embodiment is contingent on the stretch factor of the zipper. Currently, the maximum stretch factor for mass produced zippers is approximately 10% length-wise. Thus, in some
  • a taper albeit less of a taper than with no stretchable zipper, may still be used for optimum fit to cover multiple mattress sizes.
  • a standard zipper may be used that is 4-8" smaller than the standard perimeter of a mattress. This also compensates for a reduced actual perimeter of the mattress, due the rounded edges that manufacturers often use, which may vary in roundness as well, thus causing variations between manufacturer to manufacturer and model to model of the actual upper perimeter.
  • the top sheet may itself be stretchable so that an example sheet does not fit awkwardly on different mattresses.
  • Figures 3 and 4 illustrate, respectively, a fitted sheet with tapered edges and an exploded view of the fitted sheet and a mattress, indicating how its two portions fit onto an example mattress.
  • the two portions are connectable via a zipper, with one set of the zipper's teeth provided on the upper portion, and another set of the zipper's teeth provided on the lower, or side panel, portion.
  • fabric made or woven with a stretchable fiber such as Lycra® is available in two forms, a two-way stretch fabric where the Lycra® only runs along only the warp (lengthwise/longitudinal yarn) or the weft (the transverse/latitudinal yarn), and a four-way stretch fabric where the stretchable fiber runs through both the warp yarn and the weft yarn.
  • a two-way stretch fabric should be used on the side panel portion, i.e., one that only stretches laterally, so as to compress the fabric along the width (but not the height or thickness) of the side of a mattress.
  • a normal zipper may be replaced with a quick release zipper.
  • This allows the upper portion of the sheet system to be "yanked” instead of being unzipped, which even further simplifies the process of changing sheets.
  • the quick release zipper case actions required to change the sheet are simply to yank off the sheet and zip a new one back on in its place.
  • the only consideration is to place the zipper end at the foot of the bed (where the user's feet go) as this is usually not where a bed touches walls of a room.
  • a zipper end may be placed anywhere along the perimeter of the mattress edge.
  • both the side panel fabric as well as the top portion fabric may be flanged beyond their seam, to conceal the zipper. This is shown in detail in Figures 9 and 10, described below.
  • a reversible zipper may be used. This type of zipper does not have the characteristic "zipper teeth" appearance, and may also be matched to the color of the adjacent fabric. In embodiments, this may cause the two part sheet system to visually resemble a conventional fitted sheet, but have all the added functionality in accordance with various embodiments.
  • the problems of fitted sheets loosening up, wrinkling, and being generally difficult to change for cleaning may be solved.
  • various embodiments improve the aesthetics - a bed made with a fitted sheet according to various embodiments will always look "made” and appear taut, with clean lines and no wrinkles. In many embodiments, creasing is substantially non-existent.
  • a bed equipped with a sheet system according to various embodiments will look neat, and a two part construction offers many design possibilities as to color, fabric and interaction with surrounding light, as designers now have two elements to work with instead of just one.
  • Figure 6 illustrates some of the design features described above.
  • the upper panel illustrates the ease of removal and attachment of a new or freshly laundered upper portion or top sheet.
  • the zipper is 4-8" shorter than the perimeter of the mattress sleeping surface
  • the longer side of the trapezoid (side nearest the top of the mattress) on each side panel is 0-5% shorter than the corresponding side of the mattress which it covers.
  • it should be stretched to equal the length of the side, to ensure that the entirety of the zipper is sewn to the fabric.
  • the shorter side of the trapezoid (side that is tucked under the bottom of the mattress) may be 5-20% shorter than the corresponding length of the mattress, depending upon how much spandex (Lycra®) is used.
  • the Lycra® (or equivalent stretchable fiber) content in the side fabric may be between 5%-25%.
  • the Lycra® should preferably only run along it widthwise (horizontal dimension), i.e. a 2-way stretch fabric and not a 4-way stretch fabric (the latter of which would mean that the Lycra® runs both lengthwise and depthwise along the side of the mattress), to ensure that the zipper maintains its position on the mattress, or, where a 4-way stretch fabric is used, the widthwise stretch should be greater than the vertical stretch.
  • the upper portion fabric should be 3-15% smaller in every dimension (length and width) than the size of the mattress it covers. It may, or may not comprise a Lycra® type fiber to compensate for shrinkage after washing. As noted, the fabric is stretched to actual length of the mattress while being sewn to the zipper. In embodiments, the fabric may be knitted or woven. In the case it is a knitted Qersey knit) fabric it need not have added stretchable fibers, although adding some may improve performance better. If it is a woven fabric, it has added stretchable fibers, as woven fabrics lack an inherent stretch quality. In the case of a woven fabric it has stretchable fibers along both the warp and the weft (lengthwise and transverse) of the fabric to compensate for shrinkages and thereby make a bed on which it is provided wrinkle free.
  • mattress dimensions may be served: Size: Width X Length
  • example dimensions of the sheet system may be:
  • the zipper length may be (2 X (W +L)) - 6", which is 6 inches less than the full perimeter.
  • the width of the top of the lateral trapezoid (along the sides of the mattress) is L - 1 .5", or W - 1 .5", as the case may be (always 1 .5 " less than the length of the side of the mattress it covers).
  • the width of the bottom of the lateral trapezoid in each case is 0.8 * width of the top of the lateral trapezoid.
  • Example embodiments of the sheet system may be made in three (3) mattress height (thickness) sizes: 12", 16" and 18".
  • this fabric may be at least a 4-way stretch fabric; it is noted that knitted Jersey fabric may be used, which is stretchable along all 360 degrees inherently)
  • Lycra® (or equivalent) content in side panels (2-way stretch fabric): 20%
  • FIGs 7-18 illustrate an example sheet replacement system according to various embodiments.
  • an example user attaching an upper surface of a fitted sheet to a side panel already anchored on a mattress, in accordance with various embodiments.
  • Figure 8 illustrates the example fitted sheet of Figure 8, once the upper surface has been fully attached, in accordance with various embodiments.
  • the attachment mechanism here is a hidden zipper, as shown in Figures 9 and 10, next described.
  • Figure 9 illustrates a close up view of the covered zipper of the fitted sheet of Figure 8, in accordance with various embodiments
  • Figure 10 illustrates the close up view of Figure 9, after the fabric flaps covering the zipper have been partially opened to expose the zipper, in accordance with various embodiments.
  • the side portion of the sheet is of one color fabric
  • the replaceable top sheet is of another color fabric.
  • the fabrics may be the same, except for the color, or, for example, the two fabrics may be different, of differing properties and compositions, such as 2-way stretch for side panel, 4-way stretch for upper portion (top sheet).
  • the side portion and the replaceable top portion may be of the same fabric, both as to color and as to composition and properties, in which case the side panels would be made of a 4-way stretch fabric as well.
  • Figure 1 1 illustrates a pocket provided on a side panel of the fitted sheet of Figures 8-10, in accordance with various embodiments
  • Figure 12 illustrates a wide angle view, of a side pocket such as is shown in Figure 1 1 , in accordance with various embodiments.
  • one pocket is shown in these example images, in embodiments there may be several pockets provided on an outer surface of a side portion of a replaceable sheet system, to hold, for example, a smart phone, a music player, one or more remote controls for television or other media, etc.
  • Figure 13 illustrates manipulating a zipper using a pull or toggle device on the example fitted sheet of Figures 8-10, in accordance with various
  • the toggle provides a better mechanical advantage, as the point of applied pulling force is farther away from the actual zipper handle. As a result, it decreases the time needed to unzip or zip the two portions of the sheet system together.
  • the toggle as well as the zipper handle are concealed once the two fabrics have been fully attached together. In embodiments, this may be achieved by using a special zipper slider that has a crown that extends to the back of the zipper body, which allows the pull to slide to the inside and be hidden.
  • Figure 14 depicts an underside view of a corner of an exemplary mattress on which the side portion of a fitted sheet has been attached, in accordance with various embodiments.
  • the diagonal line connecting the two side panel portions is shown, which is a result of the trapezoidal shape of each side panel portion.
  • Figure 15 illustrates a perspective view of the mattress underside of Figure 14, showing two corners and an entire side panel between them, in accordance with various embodiments.
  • Figure 16 depicts a view of the entire underside of the mattress with side panel attached of Figures 14 and 15, in accordance with various embodiments.
  • the bottom edge of the side panel of a fitted sheet is finished in an elastic band. It is noted that due to the compression fit of the side sheet, created by using dimensions smaller than that of the actual mattress, as described above, and by using a stretchable fabric, also as described above, in embodiments the sheet will be taut even without such an elastic band. However, by adding the elastic band, in embodiments, a final "tug" is provided at the bottom perimeter of the side panel, further holding it in place.
  • the elastic band may be slightly smaller in length than the bottom perimeter of the side panel, causing the elastic band to always be in a stretched state, and thus exert a pulling force, holding the side panel in place.
  • Figure 17 depicts the upper surface of the mattress of Figures 8-10, with an example side panel ready for attachment to an upper portion of a fitted sheet, in accordance with various embodiments.
  • the unattached one-half of the zipper is seen at the top perimeter of the side panel, which causes the upper perimeter of the shown side sheet to droop a bit.
  • Figure 18 depicts nearly full attachment of the upper portion of the fitted sheet to the side panel of Figure 17, in accordance with various embodiments.
  • Figures 19 through 24 illustrate an alternate embodiment of the replaceable sheet system, in accordance with various embodiments.
  • the example of Figures 19-24 further includes a mattress protector sewn at the top perimeter of the side panel of the replaceable sheet system, just below the zipper line, in accordance with the alternate embodiment.
  • the same fabric is used for both the top sheet as well as the side panel, to provide a more
  • the fabric on both the upper portion and the side panel may be a 4-way stretch fabric.
  • the stretchable fiber content e.g., Lycra®
  • the stretchable fiber content is preferably between 5-25%.
  • anchoring of the side panel onto a mattress is achieved using the trapezoid shape for each side of the side panel portion, as described above, which results in a greater lateral tension as the fabric of the side panel becomes more stretched toward the bottom of (and underneath) the mattress.
  • top sheet 1910 provided with one half of a zipper, and a mattress protector 1930, which is connected to side panel 1940, sewn just below the zipper.
  • mattress protector 1930 may be any fabric, preferably with a thermoplastic polyurethane (TPU) backing.
  • mattress protector matches the dimension of, and thus fits within, the perimeter length of the zipper (not the area of the mattress)
  • top sheet 1910 and side panel 1940 are provided with zipper teeth 1920, as shown. To connect the two assemblies, the zipper teeth are connected.
  • Figures 20A and 20B illustrate a comparison of conventional fitted sheet dimensions and shape, with that of a trapezoidal shape, in accordance with various embodiments.
  • the angle 2020 between the two side panels 2010 at each corner may be between 45 and 65 degrees.
  • the example angle shown in Figure 20B is an angle of approximately 60 degrees.
  • Figures 21 A and 21 B illustrate an example zip-on sheet 21 10 in the process of attachment to a side sheet 2120 and mattress protector 2130 assembly, in accordance with various embodiments.
  • Figures 22A and 22B illustrate the relationship between the surface area of an exemplary zip-on sheet (shown in Figure 22A), to the upper plane of a mattress (shown in Figure 22B), in accordance with various embodiments.
  • the surface area of the zip-on sheet of Figure 22A is lesser than the surface area of the upper portion of an example mattress, as shown in Figure 22B.
  • the permanent tension caused by this "tension fit" surface area mismatch results in the sheet being wrinkle free.
  • Figure 23 a schematic drawing similar to Figure 10, described above, illustrates how an example zipper lays on the peripheral edge of the mattress, and is hidden from sight by the short flaps respectively provided on each of the top sheet and side panel portions, in accordance with various embodiments.
  • FIG 24 a schematic drawing similar to Figure 13, described above, illustrates an example zipper toggle 2410, used to zip and unzip an example top sheet from the side sheet portion, in accordance with various embodiments.
  • the toggle 2410 facilitates easy and quick handling, and, when not in use, hides into the inside of the zipper when required. This is due to a special zipper slider that has a crown that extends to the back of the zipper body, which allows the toggle pull tab to slide to the inside and thereby be concealed.

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Abstract

Selon des modes de réalisation, un système de drap remplaçable comprend une partie supérieure pour recouvrir une surface de couchage d'un matelas, et une partie inférieure, pour ancrage au matelas. Selon des modes de réalisation, la partie supérieure est fixée amovible à la partie inférieure, et la partie inférieure s'ancre au matelas selon un ajustement par compression. Selon des modes de réalisation, la partie supérieure et la partie inférieure peuvent être fixées amovibles par une fermeture à glissière, qui peut être recouverte d'un tissu. Selon des modes de réalisation, chacune des parties supérieure et inférieure comprend un rabat court, qui recouvrent ensemble la fermeture à glissière lorsque les parties supérieure et inférieure sont rapprochées l'une de l'autre.
PCT/US2018/052715 2017-09-25 2018-09-25 Système de remplacement de drap WO2019060910A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/829,773 US20200288888A1 (en) 2017-09-25 2020-03-25 Fitted anchor and sheet system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762563008P 2017-09-25 2017-09-25
US62/563,008 2017-09-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/829,773 Continuation-In-Part US20200288888A1 (en) 2017-09-25 2020-03-25 Fitted anchor and sheet system

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Publication Number Publication Date
WO2019060910A2 true WO2019060910A2 (fr) 2019-03-28
WO2019060910A3 WO2019060910A3 (fr) 2019-05-31

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US4809375A (en) * 1986-04-23 1989-03-07 B & E Enterprises Mattress with removable mattress cover
US6934990B2 (en) * 2002-12-20 2005-08-30 Tom Rapisarda Non-liquid buoyant bedding
US7487560B2 (en) * 2003-01-06 2009-02-10 Mcgrath Deborah Easily changeable absorbent panel for bed clothing
JP5592168B2 (ja) * 2009-08-31 2014-09-17 ユニ・チャーム株式会社 使い捨て着用物品
GB201022028D0 (en) * 2010-12-23 2011-02-02 Sca Hygiene Prod Ab Tool for analysing liquid discharge data in an absorbent article, an absorbent article adapted for liquid dicharge data collection and a control unit

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