EP0294378B1 - Bodenteppich - Google Patents

Bodenteppich Download PDF

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Publication number
EP0294378B1
EP0294378B1 EP87901165A EP87901165A EP0294378B1 EP 0294378 B1 EP0294378 B1 EP 0294378B1 EP 87901165 A EP87901165 A EP 87901165A EP 87901165 A EP87901165 A EP 87901165A EP 0294378 B1 EP0294378 B1 EP 0294378B1
Authority
EP
European Patent Office
Prior art keywords
layer
sheet
porous
groundsheet
dense
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP87901165A
Other languages
English (en)
French (fr)
Other versions
EP0294378A1 (de
Inventor
Gerth Öhman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Isola AS
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT87901165T priority Critical patent/ATE65384T1/de
Publication of EP0294378A1 publication Critical patent/EP0294378A1/de
Application granted granted Critical
Publication of EP0294378B1 publication Critical patent/EP0294378B1/de
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/15—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays consisting of two or more layers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/001—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with several cushions, mattresses or the like, to be put together in one cover
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00—Stretchers
    • A61G1/01—Sheets specially adapted for use as or with stretchers

Definitions

  • the invention relates to a groundsheet of elastic material, according to the first part of claim 1.
  • a groundsheet of elastic material is disclosed in the GB-A-1 134 584.
  • Conventional mattresses of the type especially used for open-air and military purposes quite simply consist of an elongate rectangular sheet of a porous or foamed material having a thickness of about 5-10 mm and being elastic in character so as to allow rolling up the mattress into a cylindrical, compact roll which can be conveniently stored and carried e.g. on a rucksack.
  • the porous structure of such groundsheets provides an adequate heat-insulating effect despite the relative thinness of the sheet.
  • a serious drawback of the known mattresses is, however, that they conform too easily to the shape of the ground on which they are spread, which means that, for example, pebbles or irregularities penetrate into the mattress and form annoying bulges in the upper side of the mattress.
  • the known mattresses further offer comparatively poor resistance to point pressure; this means that e.g. the branches of a brush mat may easily penetrate through the sheet and damage it.
  • Another drawback is that the known mattresses have low tensile strength, which makes them unsuited for carrying and transporting purposes.
  • the present invention aims at eliminating the above mentioned disadvantages of previously known mattresses by providing a versatile groundsheet which can be easily manufactured at a low cost.
  • this object is achieved in that the sheet comprises not only a porous, heat-insulating first layer of polymeric material, preferably polyethylene, but also a second layer which also consists of polymeric material, such as polyethylene, but which is non-porous and, thus dense and resistant to point pressure, said second layer being intimately associated with said first layer so as to form a single integrated sheet unit, and the bottom face of said dense second layer having a lower friction coefficient or sliding resistance than the top face of the porous first layer, the material of said second layer having a density which is 10 to 30 times, preferably 20 times the density of the material of the first layer.
  • the sheet unit Owing to the density of the second layer, the sheet unit obtains, in its entirety, a tensile strength which exceeds by far the tensile strength of the porous layer alone as well as a significantly increased stiffness and resistance to point pressure as compared with the porous layer alone.
  • This increased stiffness ⁇ which does not curtail the possibility of rolling up the sheet into a conveniently transportable roll ⁇ means that the sheet can be spread also on uneven ground without objects, such as sharp pebbles or twigs, forming pronounced bulges or tearing holes in the sheet unit.
  • the dense and strong bottom layer of the sheet unit thus distributes any point pressure that may arise, such that e.g. a pebble will show merely as a gently rounded bulge in the porous upper layer.
  • the sheet unit may advantageously be used for carrying and transporting purposes.
  • the inventive sheet may in a preferred embodiment be provided with a suitable number of holes adjacent the edges of the long sides of the sheet, the holes either themselves forming or defining handles to be gripped by the user's hand or used for insertion of poles or other elongate objects which together with the sheet unit form a stretcher.
  • Fig. 1 is a perspective view of a groundsheet according to the invention
  • Fig. 2 is an enlarged cross-sectional view of the sheet
  • Fig. 3 is a perspective view illustrating an alternative embodiment of the sheet
  • Fig. 4 is a perspective view illustrating the sheet used as a stretcher
  • Fig. 5 is a perspective partial view illustrating how a hole in the sheet is used to form a handle.
  • Fig. 1 shows a groundsheet generally designated 1, having an elongate rectangular form with rounded corners.
  • the sheet may have a length of about 2 metres and a width of 0.55-0.65 metre.
  • the sheet 1 is made up of two layers 2, 3, viz. a first porous, thermally insulating layer 2 of polymeric material, preferably polyethylene, and a second layer 3 of the same polymeric material, e.g. polyethylene, which is however non-porous and, thus, dense and highly resistant, and which forms the bottom part of the sheet.
  • the two layers 2, 3 are intimately interconnected so as to form a single integrated sheet unit, the bottom side of the dense layer 3 being even and smooth, while the top side of the porous first layer 2 has an uneven or rough surface structure.
  • the material of the bottom layer 3 preferably has a density which is 10-30, preferably about 20 times higher than that of the material of the porous top layer 2.
  • the layer 3 may thus have a density of 0.9-1.0 kg/dm3, while the porous top layer 2 has a density of about 0.05 kg/dm3.
  • the material of the two layers may preferably be low-density polyethylene, the porosity of the polyethylene of the top layer 2 being obtained by foaming.
  • the two layers may either be manufactured separately and be joined in a final manufacturing step, e.g. by heat treatment, or be manufactured from a single web of material which is subjected to foaming on one side, while the other side is allowed to retain its dense character. In both cases, a product is obtained whose two layers form an integrated unit in which every tendency of separation between the layers is precluded. Since the layers are made of one and the same polymeric material, the molecular chains in the bonding zone between the layers will in fact be intermixed and hooked onto each other so as to provide an extremely strong linkage between the layers, which is practically inseparable.
  • the thickness of the bottom layer 3 may be 0.5-2.0 mm, preferably about 1 mm, while the thickness of the top layer 2 may be 2-15, preferably about 5 times the thickness of the bottom layer.
  • the total thickness of the sheet unit is about 6 mm, and although the bottom layer 3, because of its dense structure, is considerably stiffer than the porous top layer 2, the sheet unit in its entirety is still so elastic that it may be readily rolled up into a conveniently portable cylindrical roll. Since the bottom side of the dense bottom layer 3 is even and smooth, the sheet unit may advantageously be pulled on the ground, e.g. when covered with snow, while the rough surface of the upper side of the top layer 2 will assist in preventing e.g. a person lying on the sheet, from sliding off. The rough surface further allows the access of air between the upper side of the sheet and a person lying thereon, such that, for example, the person's skin will not tend to adhere to the sheet surface, as is the case with even and smooth surfaces.
  • the sheet 1 is provided adjacent the edges of its long sides with a suitable number of holes 4 serving to provide handles for carrying the sheet.
  • Providing groundsheets with holes to form gripping means is per se previously known from US patent specification 4,067,079.
  • the holes are however so small that they are suited for gripping only by a few fingers.
  • Characteristic of the holes 4 formed in the inventive sheet unit is that they have the shape of arcuate gaps or slots defining a tongue 5 which can be bent by a hand into a cylindrical or part-cylindrical form. This is illustrated in greater detail in Fig.
  • the portions of material 5, 6 form a roll-shaped handle portion which allows the user to have a firm hold without the comparatively thin layers of material cutting into his fingers.
  • the possibility of obtaining a firm and ergonomically optimal hold by means of the four gripping holes or slots disposed in the four corners of the sheet 1 is further promoted by the fact that the slots are arranged obliquely in relation to the longitudinal direction of the sheet.
  • an imaginary straight line interconnecting the two opposite ends of the slots passes obliquely at an angle of 10-30°, preferably about 20°, in relation to the adjacent longitudinal side edge of the sheet.
  • the handle-forming holes or recesses 4 may be spaced 80-140 mm from the adjacent edge of the sheet.
  • the sheet unit has three handle-forming holes 4 along each long side, meaning that four people in all can carry the sheet unit when used as a stretcher, viz. one at each short side and one at each long side of the sheet unit.
  • the holes or slots 4 can be punched in the sheet unit which also itself can be formed by punching, viz. from a web of material supplied in the form of a roll.
  • Fig. 3 shows an alternative embodiment having four handle-forming holes or slots along each long side.
  • the holes merely consist of slits 4′ extending arcuately between two spaced-apart punched holes 4 ⁇ having a comparatively small diameter.
  • the total covering surface area of the sheet unit is increased, so as to counteract the penetration of moisture up through the handle holes without lessening the possibility of forming a handle by the hand, when so required.
  • the inventive sheet unit may preferably be used by soldiers and be included, when in the rolled-up state, in the soldier's normal kit, and be used routinely as a mattress or, on extraordinary occasions, as a stretcher.
  • the inventive groundsheet may, of course, also be used in fields other than the military one and other than as a mattress. Thus, it may be used, either in original size or as a smaller unit, for moving a bed-confined patient from one place to another, or for changing the patient's position. Moreover, the sheet can be used as a seat for sliding over snowy ground, i.e. on slopes.
  • the two different layers of the sheet from one and the same polymeric material, such as polyethylene, it is per se conceivable to make them of different polymeric materials, e.g. polyethylene and polypropylene. It is even conceivable to make up the sheet of more than two layers of the type described. It should also be observed that a higher friction coeffecient or sliding resistance of the upper side of the top layer as compared with the bottom side of the bottom layer can be achieved other than by making the upper side pronouncedly rough. Thus, it will in itself offer a high sliding resistance even if the surface of the layer is relatively even or smooth.

Landscapes

  • Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Laminated Bodies (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Photoreceptors In Electrophotography (AREA)

Claims (4)

1. Bodenmatte aus elastischem Material, das ein Zusammenrollen der Matte zu einer im wesentlichen zylindrischen, leicht tragbaren Rolle ermöglicht, umfassend eine poröse, wärmeisolierende erste Schicht (2) aus Polymermaterial, vorzugsweise Polyäthylen, und eine zweite Schicht (3), dadurch gekennzeichnet, dass die zweite Schicht ebenfalls aus Polymermaterial, z.B. Polyäthylen, besteht, aber porenfrei und somit dicht und gegen Punktdruck beständig sowie mit der ersten Schicht eng verbunden ist, um mit dieser eine einzige integrierte Matteneinheit zu bilden, wobei die Unterseite der dichten zweiten Schicht (3) einen niedrigeren Reibungskoeffizienten oder Gleitwiderstand hat als die Oberseite der porösen ersten Schicht (2), und wobei das Material der zweiten Schicht (3) eine Dichte aufweist, die 10 bis 30 mal, vorzugsweise etwa 20 mal die Dichte des Materials der ersten Schicht ist.
2. Bodenmatte nach Anspruch 1, dadurch gekennzeichnet, dass ein und dasselbe Polymermaterial, z.B. Polyäthylen, in den zwei Schichten (2, 3) verwendet ist.
3. Bodenmatte nach einem der vorhergehenden Ansprüche, mit an den Kanten der Matte ausgebildeten Löchern zum Abgrenzen von Griffen im Material der Matte, dadurch gekennzeichnet, dass jedes Loch die Form eines bogenförmigen Spalts oder Schlitzes (4, 4′) hat, der eine Zunge (5) abgrenzt, welche von der Hand des Benutzers in eine teilzylindrische oder gewölbte Form gebogen werden kann, so dass im Bereich zwischen dem Loch und der Mattenkante rollenförmige Teile des Mattenmaterials gebildet werden.
4. Bodenmatte nach Anspruch 3, dadurch gekennzeichnet, dass eine gedachte Linie zwischen den Enden des bogenförmigen Spalts oder Schlitzes sich schräg relativ zu einer angrenzenden Kante der Matte, vorzugsweise in einem Winkel von 10 bis 30°, vorzugsweise etwa 20°, erstreckt.
EP87901165A 1986-02-10 1987-02-10 Bodenteppich Expired EP0294378B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87901165T ATE65384T1 (de) 1986-02-10 1987-02-10 Bodenteppich.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8600559 1986-02-10
SE8600559A SE8600559L (sv) 1986-02-10 1986-02-10 Universell aklapp

Publications (2)

Publication Number Publication Date
EP0294378A1 EP0294378A1 (de) 1988-12-14
EP0294378B1 true EP0294378B1 (de) 1991-07-24

Family

ID=20363401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87901165A Expired EP0294378B1 (de) 1986-02-10 1987-02-10 Bodenteppich

Country Status (7)

Country Link
EP (1) EP0294378B1 (de)
AU (1) AU7024087A (de)
DK (1) DK166477B1 (de)
FI (1) FI85104C (de)
NO (1) NO177373C (de)
SE (1) SE8600559L (de)
WO (1) WO1987004614A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250135269A1 (en) * 2022-08-18 2025-05-01 Ethan Prochnik Improved mat and support structure

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991003221A1 (en) * 1989-09-08 1991-03-21 A/S Platon Transportation device, especially for transportation of persons
AU4257493A (en) * 1992-05-05 1993-11-29 Clarence E Farrow Patient support device
SE501679C2 (sv) * 1993-07-21 1995-04-10 Johan Ullman Båranordning
FR2717376B1 (fr) * 1994-03-18 1996-05-24 Eif Civière jetable perfectionnée.
US5465441A (en) * 1994-07-25 1995-11-14 Chun; Bongsoo Slideable seating member
AU691520B2 (en) * 1994-07-26 1998-05-21 Gerth Ohman Lying underlay
US5638558A (en) * 1994-12-20 1997-06-17 Moore; Florence J. Dual purpose patient pad with digital eyelets
SE505625C2 (sv) * 1996-01-26 1997-09-22 Investment Ab Falernia Räddningsanordning
DE19621168A1 (de) * 1996-05-24 1997-11-27 Huels Troisdorf Rollbare Isoliermatte
FR2757755B1 (fr) * 1996-12-30 1999-03-26 Simmons Cie Continentale Procede de realisation d'un matelas a partir d'une plaque brute de latex et matelas de literie obtenu par un tel procede
US6233766B1 (en) 1997-01-21 2001-05-22 öHMAN GERTH Foldable carrier
LT4183B (en) 1997-01-22 1997-06-25 Gerth Oehman Lying underlay
FR2764186A1 (fr) * 1997-06-05 1998-12-11 Peters Drap de transport a usage unique
US6053572A (en) * 1999-03-08 2000-04-25 Doran; Michele R. Device for facilitating access to sitting position on car seat
AU2003251672A1 (en) 2002-08-27 2004-03-19 Ecolab Inc. Rescue underlay for mattresses
DE20316498U1 (de) * 2003-10-24 2005-03-10 Ecolab Inc., St. Paul Rettungsunterlage zur Personenrettung
US7428763B2 (en) * 2006-08-14 2008-09-30 Anthony Hightower Universal, multipurpose pillow used for beauty and/or health purposes
CN106923974B (zh) * 2017-04-12 2018-02-16 青岛市妇女儿童医院 自寻重心发热保温担架

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE625615A (de) * 1961-12-05
SE311416B (de) * 1966-07-01 1969-06-09 Jaernhs Elektriska Ab
US4067079A (en) * 1976-04-05 1978-01-10 Buchman Ernest C Patient shifting aid and method of using same
US4048681A (en) * 1976-09-15 1977-09-20 Evelyn Mae Baulch Patient lift board
DE3372911D1 (en) * 1982-05-20 1987-09-17 John Duncan Gordon Troup Improvements in or relating to patient handling aids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250135269A1 (en) * 2022-08-18 2025-05-01 Ethan Prochnik Improved mat and support structure

Also Published As

Publication number Publication date
SE8600559L (sv) 1987-08-11
NO874228L (no) 1987-12-01
DK522087A (da) 1987-10-12
AU7024087A (en) 1987-08-25
SE8600559D0 (sv) 1986-02-10
WO1987004614A1 (en) 1987-08-13
NO177373B (no) 1995-05-29
FI883712A0 (fi) 1988-08-09
FI85104B (fi) 1991-11-29
NO874228D0 (no) 1987-10-09
FI85104C (fi) 1992-03-10
DK166477B1 (da) 1993-06-01
FI883712L (fi) 1988-08-09
NO177373C (no) 1995-09-06
DK522087D0 (da) 1987-10-05
EP0294378A1 (de) 1988-12-14

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