Beds – Mattress – Having confined gas
Reexamination Certificate
1999-12-08
2001-02-13
Grosz, Alexander (Department: 3628)
Beds
Mattress
Having confined gas
C005S686000, C005S932000, C005S708000
Reexamination Certificate
active
06185770
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an air mattress, more particularly to an air mattress which can be manufactured at a reduced cost.
2. Description of the Related Art
FIG. 1
illustrates a conventional air mattress
1
which includes an upper sheet
11
, a lower sheet
13
, and a surrounding sheet
12
interconnecting the upper and lower sheets
11
,
13
. An upper edge
121
of the surrounding sheet
12
is sealed to four sides of the upper sheet
11
. A lower edge
122
of the surrounding sheet
12
is sealed to four sides of the lower sheet
13
. The upper sheet
11
has a top surface adapted to be in contact with the body of a user. To provide a comfortable feeling of touch, the top surface of the upper sheet
11
is pre-treated, such as by printing, by attaching with fabrics or by planting tufts thereon. However, a pre-treated plastic sheet, such as a tufted plastic sheet, has a significantly higher cost of material than a non-treated plastic sheet. In the conventional air mattress
1
, the upper sheet
11
has a size generally identical to that of the lower sheet
13
. The cost of material for manufacturing the air mattress
1
is relatively high.
SUMMARY OF THE INVENTION
Therefore, the main object of the present invention is to provide an air mattress which can be manufactured at a lower material cost.
Accordingly, the air mattress of the present invention includes an inflatable main body which has an upper sheet, a lower sheet, and front and rear sheets. The upper sheet is made of a heat-sealable plastic material, and has front and rear edges and opposite lateral edges. The upper sheet further has a tufted top surface. The front sheet is made of a heat-sealable plastic material, and has an upper edge which is sealed to the front edge of the upper sheet, a lower edge, and opposite lateral edges interconnecting the upper and lower edges. The upper edge of the front sheet is longer than the front edge of the upper sheet, and has excess portions on two sides of the front edge of the upper sheet. The rear sheet is made of a heat-sealable plastic material, and has an upper edge which is sealed to the rear edge of the upper sheet, a lower edge and opposite lateral edges which interconnect the upper and lower edges of the rear sheet. The upper edge of the rear sheet is longer than the rear edge of the upper sheet, and has excess portions on two sides of the rear edge of the upper sheet. The lower sheet is made of a heat-sealable plastic material, and has a front edge, a rear edge and two opposite lateral edges interconnecting the front and rear edges of the lower sheet. The front edge of the lower sheet is sealed to the lower edge, the lateral edges, and the excess portions of the upper edge of the front sheet. The rear edge of the lower sheet is sealed to the lower edge, the lateral edges, and the excess portions of the upper edge of the rear sheet. The lateral edges of the lower sheet are sealed to the lateral edges of the upper sheet. An air receiving space is confined by the upper, lower, front and rear sheets.
REFERENCES:
patent: 4365370 (1982-12-01), Larson
patent: 6076214 (2000-06-01), Klimenko
Grosz Alexander
Millen White Zelano & Branigan P.C.
Team Worldwide Corporation
LandOfFree
Air mattress does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Air mattress, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air mattress will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2585627