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Publication numberUS20060059626 A1
Publication typeApplication
Application numberUS 11/200,483
Publication date23 Mar 2006
Filing date8 Aug 2005
Priority date6 Aug 2004
Publication number11200483, 200483, US 2006/0059626 A1, US 2006/059626 A1, US 20060059626 A1, US 20060059626A1, US 2006059626 A1, US 2006059626A1, US-A1-20060059626, US-A1-2006059626, US2006/0059626A1, US2006/059626A1, US20060059626 A1, US20060059626A1, US2006059626 A1, US2006059626A1
InventorsMary Greenleaf
Original AssigneeGreenleaf Mary D
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Resilient polygram-shaped prismatic bodies for use in stuffed articles
US 20060059626 A1
An envelope including a plurality of polygram-shaped prismatic bodies of precision formed resilient material, such as expanded foam, having, in cross section, a plurality of radially extending arms. The radially extending arms may all have the same radial length or may be of different radial lengths, and may all have the same distance between adjacent roots, or may have different distances between adjacent roots. In addition, each radially extending arm has sides that converge to an apex at the arm crest, thereby minimizing any propensity to link with physically adjacent bodies. The converging surfaces of the polygram-shaped prismatic bodies, as established from an arm's roots to its crest, may be planar or may be curved. Through this configuration, loft of the envelope is increased, clumping decreased, and compatibility maintained. A compaction enabled envelope is also disclosed.
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1. A stuffed article comprising:
a flexible envelope defining an enclosed space; and
a plurality of polygram-shaped prism bodies disposed in the enclosed space.
2. The stuffed article of claim 1 wherein the flexible envelope comprises a single panel.
3. The stuffed article of claim 1 wherein the flexible envelope comprises a first panel attached to a second panel.
4. The stuffed article of claim 3 wherein the first panel is constructed of a material different from the second panel.
5. The stuffed article of claim 1 further comprising an auxiliary panel attached to an outer periphery at one side of the flexible envelope to form an open-ended pocket presenting to an opposite side of the article.
6. The stuffed article of claim 5 further comprising a closure means for assisting in retaining the stuffed article in a compacted state once involuted into the open-ended pocket.
7. The stuffed article of claim 6 wherein the closure means comprises a drawstring encircling the auxiliary panel and at least one of the first or the second panel.
8. The stuffed article of claim 1 wherein the plurality of bodies are substantially homogeneous.
9. The stuffed article of claim 1 wherein the plurality of bodies are substantially heterogeneous.
10. The stuffed article of claim 1 wherein at least some of the polygram-shaped bodies have four arms.
11. The stuffed article of claim 1 wherein all of the polygram-shaped bodies have four arms.
12. The stuffed article of claim 1 wherein each polygram-shaped body has a longitudinal axis and the length of the longitudinal axis is greater than a distance between a crest vertex of one arm and a crest vertex of a substantially opposite arm.
13. The stuffed article of claim 1 wherein at least some of the sides of at least some polygram-shaped bodies are generally curvilinear, when viewed in cross section.
14. The stuffed article of claim 1 wherein all of the sides of at least some polygram-shaped bodies are generally curvilinear, when viewed in cross section.
15. The stuffed article of claim 1 wherein at least some of the side surfaces of at least some polygram-shaped bodies are curvilinear.
16. The stuffed article of claim 1 wherein the stuffed article is a pillow.
  • [0001]
    The applicant hereby claims benefit, under 35 USC §119, of co-pending U.S. provisional patent application No. 60/599,397 filed Aug. 6, 2004, which application is incorporated herein by this reference.
  • [0002]
    For both business and pleasure, people are spending more time traveling. Whether traveling internationally on business, or hiking a trail to a remote mountain lake, people have an ever increasing need to carry with them items to make these journeys more pleasant. Conventional travelers, whether motivated by exhaustion or otherwise, will often choose to sleep during their travels; unconventional travelers (hikers, bikers, etc.) likewise also choose to sleep during their treks, either as carryover camping trips or during siestas en route to their destination. One item desired by these groups to facilitate traveling comfort is a pillow.
  • [0003]
    Although desired, travelers often times will not bring pillows because pillows have one of two problems; either: (1) the pillow's volume is too great to allow for reasonable portability by an individual traveler; or (2) a pillow, by being too small and/or inadequately stuffed, exhibits loft insufficient to adequately support the user's head; i.e., the weight exerted on the pillow by a user's head (or other body part) will overly flatten the pillow, rendering useless its cushioning properties.
  • [0004]
    Both pillow size and its cushioning properties are integrally related to the material used to stuff the pillow. Pillow stuffing materials vary greatly (e.g., down, cotton, polyester, etc.), but optimally should be lightweight and resilient (high loft memory, i.e., not becoming permanently flattened when pressure is applied), and should not (unlike down and some of its counterparts) bunch, i.e., shift within the envelope, thereby providing inconsistent cushioning and/or support.
  • [0005]
    One of the most common fillers today is foam, namely open cell polyurethane. While such foam can be an excellent stuffing medium (it has high insulative properties, durability and loft, and good tensile rigidity), it possesses a single significant shortcoming for users who wish to travel with polyurethane foam filled pillows: Although compressible, the volume of space occupied by a piece of polyurethane foam, of thickness adequate to provide cushioning and/or support to a user, cannot be reduced (either through rolling or folding) to a volume sufficiently small enough to make its compacted state a particularly more desirable size for traveling. In other words, the reduction in volume though manual compaction is relatively small.
  • [0006]
    Manufactures have sought fervently for a solution to the compactability problem inherent in polyurethane stuffing material, but have come short of their goal. One endeavor has led manufactures to use foam in flocked rather than block form. Flocked foam, due to its arbitrary protrusions, bumps, and wrinkles, which result during production, either by tearing or shredding, exhibits the desirable property of being able to occupy a volume greater or equal to that of block foam, but with a significantly reduced aggregate foam volume. Thus, this solution provides a means by which an envelope can be filled with less material but still fill the same spatial volume that block foam would fill. The result is a reduction in fill material, which results in decreased material costs and weight, plus the advantage of less material present during compaction whether by rolling or folding the filled envelope.
  • [0007]
    Being broken into small pieces, flocked foam elements can easily be pushed past one another during compression. However, a drawback with flocked foam is that its protrusions, bumps, and wrinkles hook on to one another and, after a very short time, bunch together within an article, contributing to a loss of loft and a “bottoming out” effect (i.e., where the stuffing material eventually fails to occupy a desired volume within the envelope, thus creating a situation-where certain sections for the envelope fail to give support or cushion). Furthermore, although flocked foam filled envelopes adequately filled to exhibit reasonable loft and support can be compacted by a greater ratio than block foam filled envelopes, many users believe that they still do not compact small enough to make the articles an appealing size for travel.
  • [0008]
    U.S. Pat. Nos. 4,109,332 and 6,235,391 propose a solution to this “bunching” problem by using foam cut into polygram-shaped rods or bent foam strands that preferably have a length and width proportionally greater than the rod thickness. Other art suggesting filling materials with shape specificity include U.S. Pat. Nos. 4,754,511, and 5,608,936 (spheres); U.S. Pat. Nos. 3,608,961, 3,999,801 (pebbles/beads).
  • [0009]
    To date, the prior art has not shown polyurethane foam, whether flocked, shaped, or in block form, to be an optimal material for stuffing envelopes that are intended to be reduced to travel sized articles through compaction, i.e., the rolling or folding of the filled envelope. Further, the art reveals no integrated means for either (1) storing a foam filled item once reduced in size; and/or (2) helping to attain or maintain the article's reduced volume state once compacted.
  • [0010]
    The invention comprises an envelope filled with polygram-shaped prismatic bodies of precision formed resilient material, such as expanded foam, wherein the bodies, in cross section, have a plurality of radially extending arms. As used herein, the term “polygram” is intended to describe not only geometric forms with linear segments as is the conventional usage of this term, but also geometric forms with curved segments replacing some or all of the linear segments and that otherwise meet the described embodiment features. Moreover, this term applies to both regular forms as well as irregular forms, with the former being used in preferred embodiments. The term “prismatic” is intended to describe not only geometric prisms having parallel end surfaces, but also those wherein the ends are not parallel. As used herein, the term “arm” references an element of a polygram, as that term is described above, that has a vertex and/or a radius at a crest (crest vertex or crest radius), a first vertex and/or radius at a first adjacent root (first root vertex or root radius) and a second vertex and/or radius at a second adjacent root (second root vertex or root radius). Thus, a polygram-shaped prismatic body comprises any two-dimensional closed curve having a plurality of radially extending arms (as generally determined by the centroid location of the closed curve presuming uniform density) and having depth, i.e., a value for the “Z” axis.
  • [0011]
    The radially extending arms may all have the same radial length or may be of different radial lengths, although the former is preferred. Moreover, the radially extending arms may all have the same distance between adjacent roots (a symmetrical or regular form), or may have different distances between adjacent roots (an asymmetrical or irregular form). In addition, each radially extending arm, when the body is viewed in the axial or “Z” direction, has sides that converge to an apex at the arm crest, thereby minimizing any propensity to link with physically adjacent bodies when a plurality thereof are placed in an enclosing environment such as an envelope. The converging surfaces of the polygram-shaped prismatic bodies, as established from an arm's roots to its crest, may be planar or may be curved.
  • [0012]
    In a preferred series of embodiments, the radially extending arms have substantially similar radial lengths and adjacent root distances (a regular polygram), and the overall maximum width of the body is preferably equal to or less than the axial length of the prismatic body. Thus, the form is generally symmetrical about a plane that includes the body axis.
  • [0013]
    In a preferred embodiment, the bodies are precision formed from open cell polyurethane foam and have an axial length of between 1 and 1.5 inches, and a width of 1 inch. Preferably, the polygram-shaped prismatic bodies are die cut (although other means for achieving a substantially smooth outer surface are contemplated such as laser cutting, water-jet cutting and surface treating cut pieces) and have four (4) symmetric, orthogonally spaced converging arms. In this embodiment, the bodies are placed in an envelope of sufficient composition to prevent unintentional escapement of the bodies. The resulting structure, which when filled with the polygram-shaped bodies describe above, creates an article, not only with an efficient loft to weight ratio, but one that can be reduced through compaction to a viable travel size.
  • [0014]
    While the envelope referenced above need not have any special attributes, an embodiment of the invention includes a means for aiding compaction. A preferred embodiment expresses the compaction aiding means through an integral drawstring arrangement and auxiliary panel.
  • [0015]
    FIG. 1 is a plan view of a compressible pillow with integrated sleeve.
  • [0016]
    FIG. 2 is an in perspective view of polygram-shaped foam filled pillow rolled into integrated sleeve.
  • [0017]
    FIG. 3 is an in end view of a die cut polygram-shaped foam body according to the invention.
  • [0018]
    FIG. 4 is an in perspective view, an embodiment where the length of the polygram-shaped foam body exceeds its width.
  • [0019]
    In the current embodiment, pillow 10 is shown in FIG. 1 in its expanded state and in FIG. 2 in its rolled and compacted state. Pillow 10 comprises envelope 20, which is defined by and constructed from at least one flexible sheet of material, and is preferably constructed from fleece panel 12 and nylon panel 14, sewn together along common periphery 16. Pillow 10 further comprises, in this embodiment, auxiliary panel 18 and drawstring 22. Disposed in envelope 20 is a plurality of die cut polyurethane foam polygram-shaped bodies 30, which are best shown in FIGS. 3 and 4. Each body 30 has first end 32 and second end 34 between which four symmetric, orthogonally spaced arms 40 of equal length radiate, and where the axial length “L” of polygram-shaped bodies 30 is greater or equal to width “W” at all points along bodies' longitudinal axis 36.
  • [0020]
    Each arm 40 includes crest 42 and is bounded by roots 44. The root to root distance is shown as 46, and the radial length is shown as 48. Thus, for the illustrated embodiment, crests 42 are orthogonal to each other, radial length 48 is the same for each arm 40, and the root to root distance 46 is also the same for any arm 40.
  • [0021]
    Analysis has shown that using polygram-shaped bodies 30 as fill material creates loft proportionate or greater to that of block foam. Proportionate loft is created due to the presence of arms 40: As the arms of one body abut those of another within the pocket, macro voids are created between the bodies because there is no close fit between bodies in a random environment. This creation of voids between the bodies concludes with the favorable result of two polygram-shaped bodies 30 exhibiting loft equal or greater to the loft of foam of the same mass when in block form. The void creation is the same phenomena which results from using flocked foam (arbitrary protrusions, bumps, and wrinkles which abut within an article); however, unlike flocked foam, precision cut polygram-shaped bodies 30 with a plurality of arms 40 do not bunch: The smooth surface of bodies 30 and the crush resistance and the axial length of arms 40, limit the degree of entanglement between bodies 30. In other words, this non-bunching quality results from two properties, namely the surface properties of bodies 30 and the shape and symmetry of arms 40.
  • [0022]
    Through entropy, flocked fill bunch when the flocked fills' protrusions, bumps, and wrinkles hook onto one another. This hooking action is facilitated by the flocking process itself. When foam is flocked it is arbitrarily torn or shredded—this tearing and shredding results in a multitude of rough edges containing micro hooks and burs (not unlike VelcroŽ). When enclosed within a compressible volume and subject to repeated compression, it is not long before these micro hooks and burs entangle, causing the flocked fill to cling, or “bunch” together and lose loft. By die cutting or precision cutting foam, however, the resulting-material has surfaces that are relatively free of hooks and burs, and so the bodies 30 do not bunch (or bunch so subtly that gentle shaking will loosen them). In the illustrated embodiment, polygram-shaped bodies 30 have edges 41 that are relatively free from any engaging protrusions.
  • [0023]
    The shape and symmetry of arms 40 also contribute to the non-bunching qualities of bodies 30. When fill-material, usually polyurethane foam, is flocked, the shape of the resulting flocked elements varies greatly. On a macro level, the flocked elements themselves are often hook shaped, or have engaging arms. When these elements with their engaging characteristics are enclosed within a pocket, they “hook” together and cause bunching, further exacerbating the “micro” hooking problems discussed above. The embodiment disclosed herein eliminates this “macro hooking” by cutting polygram-shaped bodies 30 of the same shape and dimension, each body's arms 40 being symmetric and possessing appreciable length in the “Z” axis, and therefore necessarily creating structures non-engaging in nature. Combining the polygram-shaped bodies' 30 smooth die cut edges 41 and their symmetric shape, the result is a fill that does not bunch.
  • [0024]
    The geometric qualities of body 30 constitutes not only a non-bunching, high loft fill material, but also a material that is extremely compressible. The very factors that influence loft also influence compactability. The greater the loft, the greater the compactability. And because the fill material is comprised of open cell polyurethane foam, it also exhibits great elasticity, thereby providing for a means to retain its original shape. This elasticity, however, presents a noticeable reconstitution bias. Therefore, once pillow 10 has been compacted, there is a notable reconstitution force urging expansion of pillow from the state shown in FIG. 2 to the state shown in FIG. 1.
  • [0025]
    To address the reconstitution bias, pillow 10 is constructed with an integrated auxiliary panel 18 and drawstring 22 that enables not only a means for maintaining the polygram-shaped bodies 30 in a compressed state, but aids a user during compression of said bodies. By rolling the envelope 20 towards auxiliary panel 18, the rolled portion of the envelope 20 may be placed therein, auxiliary panel 18 extended to encompass envelope 20, and drawstring 22 cinched closed. In this manner, auxiliary panel 18 prevents pillow 10 from unrolling. Those persons skilled in the art will appreciate the multitude of means available for preventing unrolling of envelope 20.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2165348 *17 Feb 193711 Jul 1939Daiber Ome CCombination outdoor jacket and pack
US2968857 *30 Jul 195724 Jan 1961Celanese CorpHigh bulk filamentary material and methods of producing the same
US3074543 *15 Sep 195822 Jan 1963Safe T Pacific Baking CompanyPacking material
US3135646 *5 May 19612 Jun 1964Du PontHelically crimped textile filaments
US3188264 *21 Dec 19628 Jun 1965Tektronix IncLoose fill packing material
US3251728 *10 Sep 196217 May 1966Dow Chemical CoStranded aliphatic olefin polymer foam for loose-fill packaging
US3425893 *3 Aug 19654 Feb 1969Sims James GTextile filaments
US3426372 *1 Jun 196711 Feb 1969Enelow Gertrude SPillow
US3608961 *4 Sep 196928 Sep 1971Robert Von HeckVariable contour cushion
US3723240 *27 May 196827 Mar 1973Dow Chemical CoAsymmetrically foamable strand
US3841455 *20 Nov 197315 Oct 1974Brown Tractors LtdClutch with engine oil cooling
US3863283 *14 Jun 19734 Feb 1975Mohr CarstenPillow with interior storage compartment
US3896934 *24 Nov 197229 Jul 1975Free Flow Packaging CorpFree flow, interlocking packing material of low bulk density
US3900648 *18 Mar 197419 Aug 1975Imre Jack SmithSpace filling material and method
US3902456 *25 Jan 19742 Sep 1975David Mildred MPet pillow and method of making the same
US3922756 *26 Aug 19742 Dec 1975Toray IndustriesApparatus for making filler materials
US3999801 *24 Oct 197528 Dec 1976James Dean WaltersBody cushion-receiving seating structure
US4027064 *30 Apr 197631 May 1977Bussey Harry JunLoose fill packing element and method of making same
US4052346 *3 Jun 19754 Oct 1977Tenneco Chemicals, Inc.Flame-retardant polyurethane foam compositions
US4109332 *21 Jan 197729 Aug 1978Werner LuckPolygonal body, consisting of plastics soft foam, as filling material for cushions or the like
US4147825 *22 Aug 19773 Apr 1979Anselm TalalayPolymeric foam cushioning article and method for making the same
US4215166 *13 Mar 197829 Jul 1980Bussey Harry JrFoamable thermoplastic stick and foamed element made therefrom
US4476587 *4 Jan 198316 Oct 1984Toru ItoiConvertible garment
US4502155 *21 Jun 19825 Mar 1985Toru ItoiOuterwear and bag in one
US4754511 *31 Mar 19875 Jul 1988Theracom CorporationSupport cushions
US4845133 *21 Mar 19884 Jul 1989The Dow Chemical CompanyFlexible polyurea or polyurea-polyurethane foams prepared from high equivalent weight amine-terminated compounds
US4862520 *5 May 19885 Sep 1989Gazzola Giovanni AOvercoat convertible into a bag
US4924541 *10 Mar 198715 May 1990Jitsuo InagakiBed pad, an automobile seat pad, a pillow or a similar cushionlike item
US4991978 *16 Jan 199012 Feb 1991Ostrowski Michael JTowel bag combination apparatus
US4998309 *30 Apr 199012 Mar 1991Tesch GuenterHealth pillow
US5061737 *24 Jun 199129 Oct 1991Hudson Gary CFilling material
US5123117 *13 Mar 199123 Jun 1992Gerard PrendergastCombination backpack and reversible jacket
US5165111 *24 Feb 199224 Nov 1992Lieberman Richard ABackpack with integral garment
US5225158 *14 Jul 19896 Jul 1993Amad TayebiApparatus for collection and decontamination of hazardous and infectious waste and carrier air
US5439730 *11 Sep 19928 Aug 1995Productive Solutions, Inc.Flowable loose packing dunnage
US5458971 *30 Sep 199417 Oct 1995E. I. Du Pont De Nemours And CompanyPillows and other filled articles and in their filling materials
US5608936 *19 Sep 199511 Mar 1997Yamaichi Co., Ltd.Flexible resin filled cushion permitting drainage
US5743448 *16 Jan 199728 Apr 1998Tsai; Cheng-ChungRaincoat concealing backpack
US5839138 *10 Mar 199724 Nov 1998Weidman; EdwardCushioned pillow with means for adjusting firmness
US5996121 *15 Apr 19977 Dec 1999Harris; EuniceConvertible coat
US6026330 *24 Oct 199715 Feb 2000Chuang; HenryMulti-function pillow
US6235391 *15 Nov 199922 May 2001Foamex L.P.Filling material for cushions
US6385775 *24 Aug 199914 May 2002Diana L. KomjatiApparel, such as a jacket or rain gear, which is collapsible into its sleeve to form a fanny pack, shoulder pack, hand pack or back pack configuration
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US8974427 *14 Apr 201010 Mar 2015James BallengerTracheostomy support apparatus
US20100262093 *14 Apr 201014 Oct 2010James BallengerTracheostomy Support Apparatus
USD771978 *7 Apr 201522 Nov 2016William Thomas McCullough, Jr.Foot cover blanket
USD778637 *1 Apr 201414 Feb 2017Barbara Barry IncorporatedPillow case
U.S. Classification5/636
International ClassificationA47G9/00
Cooperative ClassificationA47G9/0253, A47G9/10, B68G1/00
European ClassificationB68G1/00, A47G9/02B2, A47G9/10