摘要:
A web of roofing material (20) is perforated for segmentation into plural trapezoidal-shaped shingles (22). In view of the perforation (24) of the web (20), the trapezoidal-shaped shingles (22) are pre-configured for use as hip and ridge shingles advantageously having edges pre-shaped to align upon installation to present an essentially straight line of edges of contiguous shingles. The hip and ridge shingles are detachable from the web at the perforation to facilitate use of the shingles on a roofing obliquity (40). A method of applying shingles to a roof includes segmenting a pre-perforated web of roofing material into individual shingles, positioning a first trapezoidal shaped shingle on the roofing obliquity (40) so that the major parallel edge thereof is bent across a bend line of the roofing obliquity and so that the major parallel edge of the first trapezoidal shaped shingle serves as a leading exposed edge of the shingle, affixing the first trapezoidal shape shingle to the roof understructure, and using a sealant strip (36) of the first shingle as a guide for positioning a second shingle over the first shingle. A method of making the roofing material comprises forming a covering material on a first surface of a substrate; cutting the substrate into a web, the web comprising plural trapezoidal shaped shingles; and, forming perforations in the web to facilitate segmentation of the web into the plural trapezoidal shaped shingles.
摘要:
Methods and systems are described for preventing disconnection of a module from a module connector prior to initiating a shutdown routine and for preventing operation of the module unless a retention device is engaged. The system includes a switch having a first state for allowing operation of a module and a second state for initiating shutdown and/or preventing operation of the module. At least one retention device prevents disconnection of the module from the module connector. A covering member is movable between first and second positions, but is prevented from moving to the first position when the retention device in not engaged. In the first position, the covering member prevents access to the retention device and the switch is in the first state and in the second position the covering member allows access to the retention device and transitions the switch to the second state.
摘要:
Methods and systems are described for preventing disconnection of a module from a module connector prior to initiating a shutdown routine and for preventing operation of the module unless a retention device is engaged. The system includes a switch having a first state for allowing operation of a module and a second state for initiating shutdown and/or preventing operation of the module. At least one retention device prevents disconnection of the module from the module connector. A covering member is movable between first and second positions, but is prevented from moving to the first position when the retention device in not engaged. In the first position, the covering member prevents access to the retention device and the switch is in the first state and in the second position the covering member allows access to the retention device and transitions the switch to the second state.
摘要:
A roofing shingle (20) comprises a web (22) having a shingle major dimension (24) and a shingle minor dimension (26). The web (22) in turn comprises a headlap portion (30) and plural tabs (32). The headlap portion (30) extends along a web first edge (34) which is parallel to the shingle major dimension. The plural tabs (32) are formed along a web second edge (36) which is parallel to the web first edge. Adjacent ones of the plural tabs (32) are separated by a cut out (40). The cut out (40) extends in the shingle minor dimension (26). As formed, each of the plural tabs (30) has a greater extent along the shingle minor dimension (26) than along the shingle major dimension (24).
摘要:
A process of separating a desired constituent from a mixture of particulate matter including the steps of: conditioning a liquid mixture of particulate matter with a frothing agent to create a pulp; aerating the pulp to generate a float fraction of froth supported on the surface of a non-float fraction of pulp; separating a portion of froth from the float fraction; draining the separated froth; washing the separated froth with a liquid to dislodge particles comprising one or more of non-selectively attached, entrained, and entrapped particles; and recovering the washed froth, is disclosed herein. Also disclosed herein are a froth cleaning apparatus and a froth flotation apparatus for separating a desired constituent from a mixture of particulate matter. The froth cleaning apparatus includes a hood including a lower peripheral edge for interface with the top of a froth flotation cell; a discharge orifice disposed in the hood; a froth support in communication with the discharge outlet for receiving and supporting froth; and a wash sprayer disposed downstream of the discharge orifice. The flotation apparatus includes: a wall defining a flotation cell; an aerator for aerating a mixture of particulate matter to produce froth; a feed opening for introducing a mixture of particulate matter and/or froth into the cell; a discharge orifice in a wall of the cell; a froth support in communication with the discharge outlet for receiving and supporting the froth; and a wash sprayer disposed downstream of the discharge orifice.
摘要:
A web data conferencing system is coupled to a video server to provide the output video signal of the video server as the video portion of the web conference. The video server is configured to receive video signals from multiple sources and to interactively provide the video signals as an output signal to the web conference.
摘要:
A process of separating a desired constituent from a mixture of particulate matter including the steps of: conditioning a liquid mixture of particulate matter with a frothing agent to create a pulp; aerating the pulp to generate a float fraction of froth supported on the surface of a non-float fraction of pulp; separating a portion of froth from the float fraction; draining the separated froth; washing the separated froth with a liquid to dislodge particles comprising one or more of non-selectively attached, entrained, and entrapped particles; and recovering the washed froth, is disclosed herein. Also disclosed herein are a froth cleaning apparatus and a froth flotation apparatus for separating a desired constituent from a mixture of particulate matter. The froth cleaning apparatus includes a hood including a lower peripheral edge for interface with the top of a froth flotation cell; a discharge orifice disposed in the hood; a froth support in communication with the discharge outlet for receiving and supporting froth; and a wash sprayer disposed upstream of the discharge orifice. The flotation apparatus includes: a wall defining a flotation cell; an aerator for aerating a mixture of particulate matter to produce froth; a feed opening for introducing a mixture of particulate matter and/or froth into the cell; a discharge orifice in a wall of the cell; a froth support in communication with the discharge outlet for receiving and supporting the froth; and a wash sprayer disposed upstream of the discharge orifice.
摘要:
A web of roofing material (20) is perforated for segmentation into plural trapezoidal-shaped shingles (22). In view of the perforation (24) of the web (20), the trapezoidal-shaped shingles (22) are pre-configured for use as hip and ridge shingles advantageously having edges pre-shaped to align upon installation to present an essentially straight line of edges of contiguous shingles. The hip and ridge shingles are detachable from the web at the perforation to facilitate use of the shingles on a roofing obliquity (40). A method of applying shingles to a roof includes segmenting a pre-perforated web of roofing material into individual shingles, positioning a first trapezoidal shaped shingle on the roofing obliquity (40) so that the major parallel edge thereof is bent across a bend line of the roofing obliquity and so that the major parallel edge of the first trapezoidal shaped shingle serves as a leading exposed edge of the shingle, affixing the first trapezoidal shape shingle to the roof understructure, and using a sealant strip (36) of the first shingle as a guide for positioning a second shingle over the first shingle. A method of making the roofing material comprises forming a covering material on a first surface of a substrate; cutting the substrate into a web, the web comprising plural trapezoidal shaped shingles; and, forming perforations in the web to facilitate segmentation of the web into the plural trapezoidal shaped shingles.