This invention provides an improved bed. The bed comprises a top sheet, a bottom sheet connected with the top sheet, and at least one coil beam. The coil beam further comprises a first fastener attached to the top sheet, a second fastener attached to the bottom sheet, and a string connecting the first and second fasteners. In one embodiment, the first fastener further comprises a first attachment sheet with two first openings and a first bridge formed therebetween. The first attachment sheet is welded onto the top sheet. The string runs through the two first openings between the first bridge and the top sheet. In addition, the second fastener further comprises a second attachment sheet with two second openings and a second bridge formed therebetween. The second attachment sheet is welded onto the bottom sheet. The string runs through the two second openings between the second bridge and the bottom sheet.
1. An improved bed comprising:
a top sheet;
a bottom sheet connected with said top sheet; and
a plurality of coil beams, wherein at least one of said coil beams further comprising:
a first bridge attached to said top sheet, said first bridge defining an opening between said first bridge and said top sheet for receiving a string; and
a second bridge attached to said bottom sheet, said second bridge defining an opening between said second bridge and said bottom sheet for receiving said string;
wherein said string connects said first and second bridges;
wherein said bed is adapted to be filled with air; and
wherein at least one of said coil beams is longer than the other of said coil beams.
2. The bed of claim 1 further comprising a side sheet for connecting said top sheet with said bottom sheet.
3. The bed of claim 1 , wherein said first bridge further comprises a first attachment sheet, said first attachment sheet being welded onto said top sheet, said string running through said first bridge opening between said first bridge and said top sheet.
4. The bed of claim 1 , wherein said second bridge further comprises a second attachment sheet, said second attachment sheet being welded onto said bottom sheet, said string running through said second bridge opening between said second bridge and said bottom sheet.
5. The bed of claim 1 , wherein said string of each of said coil beams is tied to said top and bottom sheets to form a fixed distance therebetween.
6. The bed of claim 1 , wherein said first and second bridges are respectively evenly spread on said top and bottom sheets.
7. The bed of claim 1 , wherein said top sheet, said bottom sheet, said first bridge and said second bridge are made from polyvinyl chloride (PVC).
8. The bed of claim 1 wherein said coil beams are fully collapsible such that said top and bottom sheets are in substantial contact.
9. The bed of claim 1 wherein the longer coil beam is at the waist location of the bed.
10. An improved airbed comprising:
a top sheet;
a bottom sheet;
a side sheet for connecting said top sheet with said bottom sheet;
a plurality of first bridges each comprising a first attachment sheet, said first attachment sheet being welded onto said top sheet such as to define an opening between said first bridge and said top sheet for receiving a string;
a plurality of second bridges each comprising a second attachment sheet, said second attachment sheet being welded onto said bottom sheet such as to define an opening between said second bridge and said bottom sheet for receiving a string; and
a plurality of strings each respectively running through said first opening between said first bridge and said top sheet and through said second opening between said second bridge and said bottom sheet to connect said first and second bridges, wherein at least one string is longer than the other of said strings,
whereby the shape of a mattress is formed when air is pumped therein.
11. The airbed of claim 10 , wherein said top sheet, said bottom sheet, said side sheet, said first bridges and said second bridges are made from PVC.
12. The airbed of claim 10 wherein said airbed is fully collapsible such that said top and bottom sheets are in substantial contact.
13. The bed of claim 10 , wherein the longer string is at the waist location of the bed.
14. A method of producing a bed comprising:
attaching a plurality of first bridges with a top sheet to define a plurality of openings between said first bridges and said top sheet;
attaching a plurality of second bridges with a bottom sheet to define a plurality of openings between said second bridge and said bottom sheet; and
respectively connecting said first bridges and said second bridges with a plurality of strings, wherein at least one of said strings is longer than the other of said strings.
15. The method of claim 14 further comprising connecting said top sheet with said bottom sheet by a side sheet.
16. The method of claim 15 further comprising pumping air into said connected top, bottom and side sheets.
17. The method of claim 14 wherein respectively connecting further comprises respectively running said strings through said openings of said first bridges and said second bridges.
18. The method of claim 14 further comprising collapsing said connected first and second bridges such that said top and bottom sheets are in substantial contact.
19. The method of claim 14 , wherein the longer string is at the waist location of the bed.