Process for transforming pre-used asphaltic roofing shingles into products
OwnerMaurice Deschamps, Robert Simpsoninventors
Life of this patent
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Abstract
A process for transforming pre-used asphaltic roofing shingles into products such as paving bricks, by removing foreign matter, using a comminutor that pulls shingles downwardly through a plurality of pairs of high-speed, counter-rotating, inter-meshing blades stacked within a housing; classifying the particles, applying a release agent to the inside of the mold, charging the mold with a predetermined weight and size distribution of particles, compressing the material in the mold at high pressure, and ejecting the formed material from the mold for delivery to customers. The brick and other products are included in the scope of the application.
Claims11
A process for transforming pre-used asphaltic roofing shingles into products comprising the steps of:
- (a) receiving said shingles without foreign material and with nails;
- (b) reducing said shingles into particles in a comminutor;
- (c) removing the nails from the particles by first means of a magnet;
- (d) separating the particles into three sizes;
- (e) returning the largest particles to the comminutor;
- (f) weighing a predetermined quantity of each of the two smaller sizes of particles as a second means to control product thickness;
- (g) combining the two predetermined quantities into a charge;
- (h) procuring an empty mold configured to the shape of the product;
- (i) covering the inside faces of said mold with a release agent;
- (j) charging the mold with the charge;
- (k) distributing the charge evenly within the mold;
- (l) placing the charged mold in a press;
- (m) compressing the charge with high pressure;
- (n) maintaining said pressure until the charge is fully compressed to produce a formed material;
- (o) releasing the pressure;
- (p) removing the mold from the press;
- (q) opening the mold;
- (r) ejecting the formed material from the mold;
- (s) inspecting said formed material and delivering said formed material as product to a customer.
Dependencies are inferred from the claim text.