초록 ▼

A flexible duct adapted to be suspended from a support and method of making same. The duct comprises a conduit of heat-sealable plastic film having a longitudinally extending fin on the conduit for suspending the conduit. The fin comprises first and second face-to-face layers of heat sealable film.

A flexible duct adapted to be suspended from a support and method of making same. The duct comprises a conduit of heat-sealable plastic film having a longitudinally extending fin on the conduit for suspending the conduit. The fin comprises first and second face-to-face layers of heat sealable film. The fin includes spaced apart reinforced regions which are adapted for engagement with fasteners for suspending the conduit. The reinforced regions comprise portions of the first and second layers which are heat-sealed together. According to the method, a duct is made from an elongate tube of flexible heat sealable material. The sidewall of the tube is joined to itself along a longitudinal line to define a first relatively larger tube forming a longitudinally extending conduit, and a second relatively smaller tube forming a longitudinally extending double-walled fin for suspending the duct. Portions of the double walls of the fin are then heat-sealed together to form longitudinally spaced reinforced regions for engagement by means for suspending the conduit.

대표청구항 ▼

A flexible duct adapted to be suspended from a support, the duct comprising: an elongate seamless tube of flexible plastic film material whose wall is joined to itself along a longitudinal line to define a first relatively larger tube forming a longitudinally extending conduit and a second relativel

A flexible duct adapted to be suspended from a support, the duct comprising: an elongate seamless tube of flexible plastic film material whose wall is joined to itself along a longitudinal line to define a first relatively larger tube forming a longitudinally extending conduit and a second relatively smaller tube forming a longitudinally extending double-walled fin for suspending the duct, the double walls of the fin being heat-sealed together away from said longitudinal line only at longitudinally spaced apart locations to form reinforced regions each substantially the height of the fin and each having an aperture engageable by a fastener for suspending the duct; and at least one reinforcing strip heat-sealed over the reinforced regions of the fin.