Static structures (e.g. – buildings) – Composite prefabricated panel including adjunctive means
Reexamination Certificate
2002-01-15
2004-01-06
Chapman, Jeanette (Department: 3635)
Static structures (e.g., buildings)
Composite prefabricated panel including adjunctive means
C052S783100, C052S796100, C052SDIG009, C264S113000, C264S319000, C264S239000, C528S292000, C528S326000, C528S225000, C528S411000, C156S062200
Reexamination Certificate
active
06672031
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention is related to an environment protective liner plank structure made of waste rice grasses (or wheat stems) which are high pressure compacted. Such a liner plank is manufactured at low cost without ruining natural trees and causing environmental pollution.
FIG. 1
shows a conventional wooden liner plank
10
formed with several legs
12
and slats
11
overlaid thereon. The slats
11
are fixed with the legs
12
by nails.
Such a liner plank has some shortcomings as follows:
1. The liner plank is made from natural trees so that the forest and maintenance of water and soil may be ruined.
2. The trunk of a tree is milled into wooden boards. The slats
11
and legs
12
are made of the wooden boards. The slats
11
and legs
12
are nailed with nails
13
one by one. All these procedures are complicated and troublesome.
3. In case the slats
11
bear a heavy load of a cargo and are damaged, the slats
11
may thrust into the cargo.
4. The liner plank is heavy so that it is laborious to use and move the liner plank and a forklift must be used to move the liner plank. Therefore, it is quite inconvenient to use such liner plank.
5. It is hard and expensive to repair such a liner plank.
FIG. 2
shows another type of conventional solid liner plank
20
which is integrally made of plastic material. This liner plank
20
has a panel
21
and several legs
22
.
The above liner plank also has some shortcomings as follows:
1. The plastic liner plank has a large volume so that a large mold is necessary for integrally molding the liner plank. Moreover, it is time-consuming to mold the plastic liner plank so that it is impossible to mass-produce the plastic liner plank.
2. The plastic liner plank has a weight slightly lighter than the wooden liner plank
10
. However, it is still heavy and cannot be conveniently used.
3. The manufacturing cost for the plastic liner plank is high. Once the plastic liner plank is damaged, it will be impossible to repair the plastic liner plank and the plastic liner plank must be discarded. This leads to waste.
4. The discarded plastic liner plank will result in environmental pollution.
FIG. 3
shows still another type of conventional liner plank
30
which is made of paper material. Reinforcing material is placed between the layers of paper material to form a panel
31
and legs
33
. The panel
31
is adhered to the legs
33
to form the paper-made liner plank.
The above liner plank still has some shortcomings as follows:
1. The paper-made liner plank is also made from natural trees so that the forest and maintenance of water and soil may be ruined.
2. It is necessary to add a special reinforcing material
33
into the paper material to enhance the strength of the liner plank. Such a procedure is complicated and troublesome.
3. The paper-made liner plank may be subject to the thrust of sharp objects and is very likely to be damaged.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide an environment protective liner plank structure made of waste rice grasses (or wheat stems ) which are high pressure compacted. Such a liner plank is manufactured without ruining natural trees and causing environmental pollution.
It is a further object of the present invention to provide the above environment protective liner plank structure made of waste rice grasses (or wheat stems) at low cost.
It is still a further object of the present invention to provide the above environment protective liner plank structure made of rice grasses (or wheat stems) which is light weight and water-impermeable. The surface of the liner plank is treated with an adhesive so that the liner lank can be conveniently and durably used.
It is still a further object of the present invent ion to provide the above environment protective liner plank structure made of rice grasses (or wheat stems) which are easily compressed so that the liner plank can be mass-produced.
It is still a further object of the present invention to provide the above environment protective liner plank structure made of rice grasses (or wheat stems) which are high pressure compacted. The liner plank is not susceptible to being cut or damaged by external objects and the structural strength of the liner plank is not easily weakened.
REFERENCES:
patent: 3995003 (1976-11-01), Potter et al.
patent: 4058580 (1977-11-01), Flanders
patent: 4108377 (1978-08-01), Potter
patent: 4127636 (1978-11-01), Flanders
patent: 4486557 (1984-12-01), Gaul et al.
patent: 4716062 (1987-12-01), Klein
patent: 4748777 (1988-06-01), Glassco et al.
patent: 4879850 (1989-11-01), Glassco et al.
patent: 6164034 (2000-12-01), Roetheli et al.
patent: 6329565 (2001-12-01), Dutkiewicz et al.
Bacon & Thomas PLLC
Chapman Jeanette
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