Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
1998-12-07
2001-07-10
Szekely, Peter (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C264S037290, C264S068000, C264S319000, C264S331110, C264S331120, C264S331130, C264S331150, C264S331170, C264S331190, C106S275000, C521S040000
Reexamination Certificate
active
06258877
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to the handling of stripped roofing material such as shingles and tiles which are removed and replaced during the repair or reroofing of a building.
BACKGROUND OF THE INVENTION
At present, when a roof is to be repaired or reroofed, the old or damaged shingles or tiles, a large percentage of which are formed of asphalt are simply waste products which have to be trucked to a dump and unloaded. This disposal operation involves both transportation costs and a charge by the dump for accepting this waste material.
SUMMARY OF THE INVENTION
It is the object of the present invention to convert such old shingles or tiles into useful products. It is a further object of the invention to enable such conversion to be effected at the site of the shingle or tile removal.
A still further object is to convert such stripped roofing material into building products or elements which can be used at the removal site.
More particularly, according to the invention, the stripped roofing material is first shredded, then intensely and intimately mixed with particles of thermoplastic material and a particulate filler material to heat the mixture to bring the thermoplastic material to a viscous molten state whereby the molten thermoplastic material coats the hot shredded roofing particles and the hot filler particles to produce a hot moldable mass, then compression molding said mass to form a desired end product or products.
Because the process involves only a shredder, a motor driver mixer and a compression mold, the equipment necessary to carry out the method can readily be mounted on a truck, tractor or other vehicle and transported to the job site when the process can be carried out.
While many different products may be so formed depending on the mold used, examples of such products include interlocking blocks or bricks for driveways, walkways and the like, bricks or blocks for edging driveways, walkways or forming borders for planting areas, or blocks for forming patios and the like.
It is therefore another aspect of the invention whereby the use of the mobile shredder, mixer, and the selected compression mold can produce on the job site a product which can be advantageously used at that site.
For example, the resulting products such as interlocking blocks or tiles can then be used to provide an interlocking driveway or walkway to enhance the site.
It will be understood that, while not taking full advantage of the invention, the processing of the stripped roof material may be done away from the site, even when such stripped roof materials are no longer waste materials to be carted to the dump. Instead they are converted into valuable, useful products.
REFERENCES:
patent: 4405680 (1983-09-01), Hansen
patent: 4726846 (1988-02-01), Jackson et al.
patent: 5312858 (1994-05-01), Folson
patent: 5938130 (1999-08-01), Zickell
Royal Group Technologies Limited
Szekely Peter
LandOfFree
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