Patent ID: 11952836
Assignee: CHUNG TAI ROLLER SHUTTERS COMPANY LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E  A | IPC E

Claim 2:
3. A roller shutter including:
a chamber with an opening,
a roller curtain movable between a retracted configuration in which said roller curtain is substantially fully contained within said chamber and an extended configuration in which at least part of said roller curtain extends beyond said chamber through said opening, and
at least one guide rail along and relative to which said roller curtain is movable between said retracted configuration and said extended configuration,
wherein said roller curtain includes
a plurality of slat members interlocked with each other for relative pivotal movement, said plurality of slat members collectively forming a first major surface and a second major surface, and
a first layer of fire-resistant and/or heat-resistant fabric fixedly mounted to said first major surface of said plurality of slat members and a second layer of fire-resistant and/or heat-resistant fabric fixedly mounted to said second major surface of said plurality of slat members, and
wherein said guide rail includes at least a first sealing member which, when said roller curtain is in said extended configuration, contacts or presses into said first layer of fire-resistant and/or heat-resistant fabric to form a first seal which at least hinders the passage of smoke there-through,
wherein said first layer of fire-resistant and/or heat-resistant fabric is fixedly mounted to said first major surface of said plurality of slat members via at least one linkage member, wherein said linkage member includes at least a first link element and a second link element fixedly joined with each other by a material of a melting temperature of or below 100° C.,
wherein said roller shutter comprises a horizontally-sliding roller shutter, and
wherein, when surrounding temperature rises to at least said melting temperature of said material, said first link element and second link element are detachable from each other, and said first layer of fire-resistant and/or heat-resistant fabric is adapted to be at least partly detached from said plurality of slat members and deforms on its own weight to contact at least two wall surfaces of said guide rail to form at least two third seals which at least hinder the passage of smoke there-through.