WO1993018689A1 - Cover structure - Google Patents

Cover structure Download PDF

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Publication number
WO1993018689A1
WO1993018689A1 PCT/GB1993/000558 GB9300558W WO9318689A1 WO 1993018689 A1 WO1993018689 A1 WO 1993018689A1 GB 9300558 W GB9300558 W GB 9300558W WO 9318689 A1 WO9318689 A1 WO 9318689A1
Authority
WO
WIPO (PCT)
Prior art keywords
article
enclosure
pieces
bag
edges
Prior art date
Application number
PCT/GB1993/000558
Other languages
French (fr)
Inventor
John Walker
Original Assignee
John Walker
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 John Walker filed Critical John Walker
Priority to GB9418250A priority Critical patent/GB2279560B/en
Publication of WO1993018689A1 publication Critical patent/WO1993018689A1/en

Links

Classifications

    • 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
    • A47C31/11—Loose or removable furniture covers for chairs
    • A47C31/116—Loose or removable furniture covers for chairs permeable to liquid or air in a special way
    • 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
    • A47G9/0253—Pillow slips

Definitions

  • the present invention relates to a cover structure, and in particular, to a method of covering a cushion and a cushion so covered, a pillow and a pillow so covered, and a seating arrangement and a seating arrangement so covered.
  • Plastics covers are known for use as protective layers, for example in hospital bedding where protection against soiling is required. Often it is required to enclose an article, for example a cushion pillow or seating arrangement in such a protective layer.
  • plastics covers are generally gas impermeable a ventilation aperture must be formed in the article enclosure to allow normal use of the arcicle without causing ballooning and consequent discomfort to the user. Such an aperture however tends to reduce the attainable protection by providing a possible inlet for bacteria and the like.
  • An object of the present invention is to provide a cover structure which can provide complete protection against soiling but with which discomfort of the user can be avoided without the need for a ventilation aperture.
  • a cover structure comprising a sealed plastics enclosure having one or more pockets formed therein, a retaining region separated from such pockets for retaining an article and for preventing ingress of such article into such pockets, and means for allowing gas from said retaining region o enter such pockets.
  • article is to be taken to include any deformable item, a bag of feathers, sponge, textile material, rubber piece(s) or other similar type of article suitable for use as a cushion, a seat, a pillow or the like.
  • the means for allowing gas from the retaining region to enter the pocket or pockets comprises a series of discontinuous welds.
  • said means may comprise a single weld which does not extend across the full width of the cover structure, or a separate enclosure welded or attached to the retaining region or other flow restricting structure.
  • a cover structure for an article comprising a sealed plastics enclosure having a retaining region for retaining the article, one or more further regions defined therein and means for allowing gas from said region to enter such further regions.
  • Such a cover structure is particularly suited for use with a sealing arrangement wherein a backrest and seat portion are covered by two regions of the cover structure and ribs formed adjacent the joint between said regions allow gas trapped within the enclosure to enter the backrest region of the cover structure from the seat region.
  • the retaining region may be formed in a central portion of the enclosure and the pockets or " further regions may be formed on either side of the retaining region.
  • the retaining region is formed in a central portion of the enclosure and the pockets or further region(s) are formed around the periphery of said retaining region.
  • the retaining region may comprise a region bounded by one or more pockets into which the article may be partly located.
  • the retaining region comprises a major portion of the enclosure and the article preferably fills a major portion of the enclosure, the pockets or further regions being substantially smaller than the retaining region.
  • a method of covering an article comprising the steps of making a plastics enclosure having a retaining region and a non-retaining region, placing the article into the retaining region of the enclosure and sealing the enclosure with some gas trapped therein.
  • All the cover structures have a slight negative air pressure which causes air sacs, so contained, to suck together.
  • the weight from the head or body produces a positive pressure inside the article and the air inside is allowed to escape into the areas of vacuation. This has the effect of stopping the article from ballooning up yet still allows the movement of air within the article.
  • an aperture may be provided for example as a sealable inlet for internally sterilising the enclosure.
  • the cover structure may be of any suitable material such as PVC, polythene and the like.
  • the cover structure is made of a polyesterurethane or polyetherurethane material.
  • Fig. 1 is a plan view of an unsealed cover structure of the invention
  • Fig. 2 is a plan view of a sealed cover structure of the invention enclosing a pillow.
  • Fig. 3 illustrates a method of forming a pillow cover structure
  • Fig. 4 illustrates the completed pillow and cover structure of Fig. 3;
  • Fig. 5 illustrates a method of forming a cover structure for a seating arrangement
  • Fig. 6 illustrates a method of forming a cover structure for a cushion seat.
  • a sheet measuring 20_" x 72" or 52cm x 182cm is cut from the cover material. This is then folded along its centre line 11 to measure 36" x 20_" or 91cm x 52cm and the two 36" or 91cm sides 13 welded to form a three-sided bag. Pillow 15 is inserted by reversing the bag over it. the pillow is positioned centrally within the bag ' so that a 3" overlap 17 occurs at each end.
  • a discontinuous weld 19 is made 3" from the closed end 11 and the pillow is pushed up against this weld 19 so that a further discontinuous weld 19 can be made 3" from the open end 21. Some air is then expelled from the cover and the open end 21 is sealed.
  • the pillow structure is formed as follows: The small flap D is welded to single outer skin AB along line C. This is repeated on both sides. The flaps are then put to the outside of the structure and A is welded to Al, E is welded to El, D is welded to Dl and B is welded to Bl. The cover is then reversed. The infill pillow is then inserted as far as weld D. Flap F is welded to Fl. This then encloses the article within the bag and stops lateral movement. A small amount of air is expelled from the structure and the final weld to G and Gl is made. The gap between C and B is the negative air pressure sac and the air inside the structure can move from beneath the head into the air sacs.
  • FIG. 4 An embodiment of cover structure suitable for use with a seating arrangement is shown in Figure 4.
  • the bottom cushion ABC is manufactured either with a gusset or from a pre-moulded piece and a foam or fibre infill is inserted.
  • Two flat pieces of material are used to make the seat back DE.
  • the bag is then attached leaving air gaps at the joint between the seat and the back. Ribs are welded in the lumber region and side regions and when sat upon, the air is allowed to move from the seat to the back to support the shape of the person's back.
  • a cover structure for a cushion seat is made as follows:-
  • a gussetted bag ABC is welded together leaving out a hole DE.
  • a further smaller gussetted bag DEF is welded leaving the top DE open.
  • An infill such as foam is inserted into the larger bag and the smaller bag welded around the points DE and opposite sides after first having removed the air from the smaller bag.
  • the completed structure can then be supported on four sides with rigid foam which in itself could be covered and welded to the cover structure.
  • the three-sided bag may be made from two pieces of material, welded together along three edges thereof.
  • the means for allowing gas from the retaining region to enter the pockets or further regions may comprise a passageway connecting the retaining region or a valve means.
  • said means comprises gas restricting or limiting means.

Abstract

A cover structure comprises a sealed plastics enclosure having a retaining region for retaining an article. Means are provided for allowing gas from the retaining region to enter a further non-retaining region formed in the enclosure. The cover structure provides protection against soiling but avoids discomfort to the user caused by ballooning.

Description

COVER STRUCTURE
The present invention relates to a cover structure, and in particular, to a method of covering a cushion and a cushion so covered, a pillow and a pillow so covered, and a seating arrangement and a seating arrangement so covered.
Plastics covers are known for use as protective layers, for example in hospital bedding where protection against soiling is required. Often it is required to enclose an article, for example a cushion pillow or seating arrangement in such a protective layer.
Since plastics covers are generally gas impermeable a ventilation aperture must be formed in the article enclosure to allow normal use of the arcicle without causing ballooning and consequent discomfort to the user. Such an aperture however tends to reduce the attainable protection by providing a possible inlet for bacteria and the like.
An object of the present invention is to provide a cover structure which can provide complete protection against soiling but with which discomfort of the user can be avoided without the need for a ventilation aperture.
According to the present invention, there is provided a cover structure comprising a sealed plastics enclosure having one or more pockets formed therein, a retaining region separated from such pockets for retaining an article and for preventing ingress of such article into such pockets, and means for allowing gas from said retaining region o enter such pockets.
The term "article" is to be taken to include any deformable item, a bag of feathers, sponge, textile material, rubber piece(s) or other similar type of article suitable for use as a cushion, a seat, a pillow or the like.
Preferably, the means for allowing gas from the retaining region to enter the pocket or pockets comprises a series of discontinuous welds. Alternatively said means may comprise a single weld which does not extend across the full width of the cover structure, or a separate enclosure welded or attached to the retaining region or other flow restricting structure.
According to the invention there is further provided a cover structure for an article comprising a sealed plastics enclosure having a retaining region for retaining the article, one or more further regions defined therein and means for allowing gas from said region to enter such further regions.
Such a cover structure is particularly suited for use with a sealing arrangement wherein a backrest and seat portion are covered by two regions of the cover structure and ribs formed adjacent the joint between said regions allow gas trapped within the enclosure to enter the backrest region of the cover structure from the seat region.
The retaining region may be formed in a central portion of the enclosure and the pockets or "further regions may be formed on either side of the retaining region. Preferably, however, the retaining region is formed in a central portion of the enclosure and the pockets or further region(s) are formed around the periphery of said retaining region. The retaining region may comprise a region bounded by one or more pockets into which the article may be partly located.
Preferably the retaining region comprises a major portion of the enclosure and the article preferably fills a major portion of the enclosure, the pockets or further regions being substantially smaller than the retaining region.
According to the invention there is also provided a method of covering an article comprising the steps of making a plastics enclosure having a retaining region and a non-retaining region, placing the article into the retaining region of the enclosure and sealing the enclosure with some gas trapped therein.
According to the present invention, there is also provided a method of covering an article comprising the steps of:
(i) cutting material in one or more pieces; (ii) welding along appropriate edges of such pieces to form a three-sided bag which is larger than the article size;
(iii) inserting the article into the bag by reversing the bag over it;
(iv) arranging the article central within the bag so that an overlap lies at each end of the cover structure;
(v) either making a single weld spaced from the closed end leaving a gap at either side for the passage of air, or making a series of discontinuous welds;
(vi) pushing the article up against the weld and making a small weld line close to the opposite edge of the article spaced from the open end as described in step (v) above; (vii) expelling an amount of air from the cover structure and sealing the open end. According to the invention there is also provided a method of covering an article such as a pillow comprising the steps of:
(i) cutting material into six quadrilateral pieces, each having first, second, third and fourth edges, said pieces comprising two outer pieces corresponding substantially to the size of the article and four smaller pieces, (ii) welding first and second pieces along respective first edges thereof to a first outer piece, (iii) welding third and fourth small pieces along respective first edges thereof to the second outer piece, (iv) welding first and second respective edges of the first outer piece to first and second respective edges of the second outer piece, (v) welding together respective second edges of said second and fourth small pieces, (vi) welding together respective third edges of said first and second outer pieces, (vii) placing said thus-formed structure over said article, (viii) welding respective second, third and fourth edges of said first small piece to respective second, third and fourth edges of said third small piece, (ix) expelling some air from said resultant structure; and (x) welding together respective fourth edges of said first and second outer pieces. According to the present invention, there are also provided several methods of covering an article comprising the steps of: PILLOW
(i) The material is cut into six pieces, two pieces being the size of the outer pillow
20" x 30", and four pieces being 18" x 5", (ii) all four small pieces are welded to the two outer pieces as shown, (iii) the two outer pieces are then welded inside out along their long edges, (iv) the two inner flaps are welded together and the short edge of the outer flaps are welded together, (v) the bag is then reversed over the pillow, the two inner flaps are then welded to retain the article within the cover structure, (vi) a fixed amount of air is then expelled and the final end sealed
SEATING (i) Cutting material into approximately ten pieces to form two separate bags;
(ii) the upper bag welded to form a gussetted enclosure and the lower smaller bag similarly welded;
(iii) the support structure is inserted into the upper bag, the lower bag welded to the upper and the final seal made when a small amount of air is evacuated from the lower bag;
(iv) the structure is fitted beneath the sealed bag to support the enclosure and this can be welded to the enclosure. SEAT SUPPORT
(i) The material is cut to form a gussetted enclosure at the bottom and two flat sheets to the top. (ii) The article is inserted into the gussetted bottom bag, a small amount of air expelled and the final seal made. When sat upon this allows some aire to be expelled from the gussetted seat and the positive pressure will inflate the seat back According to the present invention, there is further provided an article sealed within a cover structure of the invention.
According to the present invention there is further provided an article sealed within a cover using a method of the invention.
All the cover structures have a slight negative air pressure which causes air sacs, so contained, to suck together.
When the article is in use, the weight from the head or body produces a positive pressure inside the article and the air inside is allowed to escape into the areas of vacuation. This has the effect of stopping the article from ballooning up yet still allows the movement of air within the article.
Although a ventilation aperture is not required in the cover structure of the present invention, an aperture may be provided for example as a sealable inlet for internally sterilising the enclosure.
The cover structure may be of any suitable material such as PVC, polythene and the like. Preferably, the cover structure is made of a polyesterurethane or polyetherurethane material.
Specific embodiments of the invention will now be described, by way of example only, and with reference to the accompanying drawings in which:-
Fig. 1 is a plan view of an unsealed cover structure of the invention;
Fig. 2 is a plan view of a sealed cover structure of the invention enclosing a pillow.
Fig. 3 illustrates a method of forming a pillow cover structure;
Fig. 4 illustrates the completed pillow and cover structure of Fig. 3;
Fig. 5 illustrates a method of forming a cover structure for a seating arrangement; and
Fig. 6 illustrates a method of forming a cover structure for a cushion seat.
Referring to Figs. 1 and 2 to cover a pillow measuring 30" x 20" or 76cm x 50cm a sheet measuring 20_" x 72" or 52cm x 182cm is cut from the cover material. This is then folded along its centre line 11 to measure 36" x 20_" or 91cm x 52cm and the two 36" or 91cm sides 13 welded to form a three-sided bag. Pillow 15 is inserted by reversing the bag over it. the pillow is positioned centrally within the bag' so that a 3" overlap 17 occurs at each end. A discontinuous weld 19 is made 3" from the closed end 11 and the pillow is pushed up against this weld 19 so that a further discontinuous weld 19 can be made 3" from the open end 21. Some air is then expelled from the cover and the open end 21 is sealed.
Referring to Fig. 3, the pillow structure is formed as follows: The small flap D is welded to single outer skin AB along line C. This is repeated on both sides. The flaps are then put to the outside of the structure and A is welded to Al, E is welded to El, D is welded to Dl and B is welded to Bl. The cover is then reversed. The infill pillow is then inserted as far as weld D. Flap F is welded to Fl. This then encloses the article within the bag and stops lateral movement. A small amount of air is expelled from the structure and the final weld to G and Gl is made. The gap between C and B is the negative air pressure sac and the air inside the structure can move from beneath the head into the air sacs.
An embodiment of cover structure suitable for use with a seating arrangement is shown in Figure 4. The bottom cushion ABC is manufactured either with a gusset or from a pre-moulded piece and a foam or fibre infill is inserted. Two flat pieces of material are used to make the seat back DE. The bag is then attached leaving air gaps at the joint between the seat and the back. Ribs are welded in the lumber region and side regions and when sat upon, the air is allowed to move from the seat to the back to support the shape of the person's back.
Referring to Fig. 5, a cover structure for a cushion seat is made as follows:-
A gussetted bag ABC is welded together leaving out a hole DE. A further smaller gussetted bag DEF is welded leaving the top DE open.
An infill such as foam is inserted into the larger bag and the smaller bag welded around the points DE and opposite sides after first having removed the air from the smaller bag.
The completed structure can then be supported on four sides with rigid foam which in itself could be covered and welded to the cover structure.
It is to be understood that the invention is not intended to be restricted to the details of the above embodiment which is illustrated by way of example only. Thus, for example, the three-sided bag may be made from two pieces of material, welded together along three edges thereof. The means for allowing gas from the retaining region to enter the pockets or further regions may comprise a passageway connecting the retaining region or a valve means. Preferably said means comprises gas restricting or limiting means.

Claims

1. A cover structure comprising a sealed plastics enclosure having one or more pockets formed therein, a retaining region separated from such pockets for retaining an article and for preventing ingress of such article into such pockets, and means for allowing gas from said retaining region to enter such pockets.
2. A cover structure as claimed in claim 1 wherein said means for allowing gas from the retaining region to enter such pockets comprises a single weld or a series of discontinuous welds.
3. A cover structure as claimed in claim 1 wherein said means for allowing gas from the retaining region to enter such pockets comprises a separate enclosure welded or attached to the retaining region.
4. A cover structure for an article comprising a sealed plastics enclosure having a retaining region for retaining the article, one or more further regions defined therein and means for allowing gas from said retaining region to enter such further regions.
5. A cover structure as claimed in claim 4 wherein said means for allowing gas from one or more of said regions to enter one or more other such regions comprises ribs formed adjacent the joint between said regions.
6. A method of covering an article comprising the steps of making a plastics enclosure, having a retaining region and a non-retaining region, placing the article into the retaining region of the enclosure and sealing the enclosure with some gas trapped therein.
7. A method of covering an article comprising the steps of:
(i) cutting material in one or more pieces;
(ii) welding along appropriate edges of such pieces to form a three-sided .bag which is larger than the article size; (iii) inserting the article into the bag by reversing the bag over it; (iv) arranging the article central within the bag so that an overlap lies at each end of the cover structure; (v) either making a single weld spaced from the closed end leaving a gap at either side for the passage of air, or making a series of discontinuous welds; (vi) pushing the article up against the weld and making a small weld line close to the opposite edge of the article spaced from the open end as described in step (v) above; (vii) expelling an amount of air from the cover structure and sealing the open end.
8. A method of covering an article such as a pillow comprising the steps of:
(i) cutting material into six quadrilateral pieces, each having first, second, third and fourth edges, said pieces comprising two outer pieces corresponding substantially to the size of the article and four smaller pieces, (ii) welding first and second pieces along respective first edges thereof to a first outer piece, (iii) welding third and fourth small pieces along respective first edges thereof to the second outer piece, (iv) welding first and second respective edges of the first outer piece to first and second respective edges of the second outer piece, (v) welding together respective second edges of said second and fourth small pieces, (vi) welding together respective third edges of said first and second outer pieces, (vii) placing said thus-formed structure over said article, (viii) welding respective second, third and fourth edges of said first small piece to respective second, third and fourth edges of said third small piece, (ix) expelling some air from said resultant structure; and (x) welding together respective fourth edges of said first and second outer pieces.
9. A method of covering an article comprising the following steps:-
(i) Cutting material into pieces to form two separate bags; an upper bag welded to form a gussetted enclosure and a lower smaller bag similarly welded;
(ii) inserting a support structure into the upper bag, welding the lower bag to the upper bag and making a final seal when a small amount of air is evacuated from the lower bag;
(iii) fitting the structure beneath the sealed bag to support the enclosure and welding this to the enclosure.
10. A method of covering an article comprising the following steps:-
(i) Cutting material to form a gussetted enclosure at the bottom and two flat sheets to the top.
(ii) Inserting the article into the gussetted bottom enclosure, expelling a small amount of air and making a final seal.
11. An article sealed within a cover structure of the invention.
12. An article sealed within a cover using a method of the invention.
PCT/GB1993/000558 1992-03-18 1993-03-18 Cover structure WO1993018689A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9418250A GB2279560B (en) 1992-03-18 1993-03-18 Cover structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9205856.9 1992-03-18
GB929205856A GB9205856D0 (en) 1992-03-18 1992-03-18 Cover structure

Publications (1)

Publication Number Publication Date
WO1993018689A1 true WO1993018689A1 (en) 1993-09-30

Family

ID=10712353

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/000558 WO1993018689A1 (en) 1992-03-18 1993-03-18 Cover structure

Country Status (3)

Country Link
AU (1) AU3760493A (en)
GB (2) GB9205856D0 (en)
WO (1) WO1993018689A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944266A (en) * 1957-02-07 1960-07-12 Wertheimer Kurt Pillow or cushion
US3864767A (en) * 1973-02-26 1975-02-11 Metrologic Instr Inc Air mattress support system
DE2739940B2 (en) * 1977-09-05 1979-07-12 Ender Geb. Haertel, Siegrid, 7022 Leinfelden-Echterdingen Cover for upholstered bodies, in particular mattresses for hospital beds
US4573740A (en) * 1983-11-15 1986-03-04 The Jasper Corporation Upholstered seat for clean room
US4768247A (en) * 1988-03-14 1988-09-06 Beier John K Travel Pillow

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944266A (en) * 1957-02-07 1960-07-12 Wertheimer Kurt Pillow or cushion
US3864767A (en) * 1973-02-26 1975-02-11 Metrologic Instr Inc Air mattress support system
DE2739940B2 (en) * 1977-09-05 1979-07-12 Ender Geb. Haertel, Siegrid, 7022 Leinfelden-Echterdingen Cover for upholstered bodies, in particular mattresses for hospital beds
US4573740A (en) * 1983-11-15 1986-03-04 The Jasper Corporation Upholstered seat for clean room
US4768247A (en) * 1988-03-14 1988-09-06 Beier John K Travel Pillow

Also Published As

Publication number Publication date
GB9418250D0 (en) 1994-11-02
GB2279560B (en) 1996-10-02
GB2279560A (en) 1995-01-11
AU3760493A (en) 1993-10-21
GB9205856D0 (en) 1992-04-29

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