
The wastes from roof removal or repair operations are a promising, but under-harvested feedstock for recycling. Manville Technical Center Bird Roofing, Norwood, MA (USA) Sponsoring Org.: DOE/CE OSTI Identifier: 7022341 Report Number(s): DOE/ID/12795-1 ON: DE90006304 DOE Contract Number: FC07-88ID12795 Resource Type: Technical Report Country of Publication: United States Language: English Subject: 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION ROOFS WASTE PRODUCT UTILIZATION ASPHALTS COMMERCIALIZATION ECONOMICS ENERGY CONSERVATION ENERGY RECOVERY WASTE PROCESSING BITUMENS MANAGEMENT ORGANIC COMPOUNDS OTHER ORGANIC COMPOUNDS PROCESSING RECOVERY TAR WASTE MANAGEMENT 320305* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management 320107 - Energy Conservation, Consumption, & Utilization- Building Systems- = ,Įleven million tons of asphalt composition shingles are disposed of annually in US landfills. Publication Date: Sun Dec 31 00:00: Research Org.: Manville Sales Corp., Denver, CO (USA).


overcome the resistance of the air to change the position of the fans.
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The use of a device having a free endwise movement would, however, require a friction or other device to. Said screw may be allowed an endwise movement, and then by pushing or pulling it will act as a rack to cause the rapid movement required or a rack might be substituted for the screw without changing the principle of operation. As the head D and fans are continually revolving with the shaft G, it is only necessary to seize and hold fast the hand-hold i, and thus arrest the revolution of the screw H, to change as desired the adjustment more rapidly than by the action of the screw H.

The stem h of the screw H projects to a point within convenient reach of the operators hand and is provided with a handhold, 2.

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US325453A - Rotary fan - Google Patents US325453A - Rotary fan - Google Patents Rotary fan Download PDF Info Publication number US325453A US325453A US325453DA US325453A US 325453 A US325453 A US 325453A US 325453D A US325453D A US 325453DA US 325453 A US325453 A US 325453A Authority US United States Prior art keywords screw fans fan axis shaft Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
