초록 ▼

An improved roll-form vent for buildings comprises a sequentially thermoformed polymeric vent which provides multiple venting air flow paths between the interior of a building and ambient atmosphere. The vent includes projections extending from a web and a plurality of vent openings that cooperate w

An improved roll-form vent for buildings comprises a sequentially thermoformed polymeric vent which provides multiple venting air flow paths between the interior of a building and ambient atmosphere. The vent includes projections extending from a web and a plurality of vent openings that cooperate with screening to bar entry into the building of water, insects and foreign matter. A method of making the vent includes steps of providing a web of material of indeterminate running length, heating the web, sequentially thermoforming the web, cooling the web and rolling the formed vent for storage, shipment and use.

대표청구항 ▼

A roof vent, comprising: a continuous, indeterminate-length roll-form web, said web being composed of a series of sequentially-thermoformed integral longitudinal sections of thermoformable material, each section having a plurality of spacer elements projecting in spaced relation from said web for sp

A roof vent, comprising: a continuous, indeterminate-length roll-form web, said web being composed of a series of sequentially-thermoformed integral longitudinal sections of thermoformable material, each section having a plurality of spacer elements projecting in spaced relation from said web for spacing said web from a roof when installed thereon, said elements being separated from one another lengthwise of said web to permit the web to be rolled lengthwise into a spiral roll during manufacture and unrolled lengthwise during installation, said elements being hollow and integral with the web and having a wall thickness which is thinner than said web as a result of having been drawn therefrom during thermoforming.