Channel-shaped flexible sealing strips
AssigneeDraftex Development AG
InventorRobert G. Bright
Life of this patent
Estimating the term…
Abstract
A channel-shaped sealing strip for mounting on a flange, for example around a door or window opening in a motor vehicle body, comprises a channel-shaped metal core or carrier. On to one wall of the channel, relatively hard flexible material, such as plastics, is directly extruded, while on to the other side wall of the channel relatively softer material, such as rubber, is directly extruded, the relatively hard material extending over the outside surface of the carrier to meet the relatively softer material. The relatively softer material is extruded integrally with an external sealing bead running along the sealing strip. The flexible material may extend over part or all of the inside surface of the carrier member.
Claims17
A channel-shaped sealing strip, comprising
- a channel-shaped carrier member made of relatively rigid material but designed so as to be flexible about the length of the channel,
- a covering of flexible material over the outside surface of the carrier member and extending over the distal edges of the side walls of the carrier member and over at least part of the inside surfaces thereof,
- the said flexible material defining gripping ribs extending longitudinally along the inside surface of the channel and projecting toward each other from the opposite side walls thereof,
- at least part of the said material on one side wall of the carrier member being of relatively hard flexible material which is placed directly onto the carrier member,
- at least part of the flexible material on the other side wall of the carrier member being of relatively softer flexible material which is placed directly onto the carrier member,
- the relatively hard and relatively softer materials not overlapping each other, and
- a beading running along the outside of the channel and defined by the relatively softer flexible material.
A method of making a channel-shaped sealing strip, comprising the steps of
- extruding flexible covering material in relatively hard and relatively soft forms directly onto different regions of a longitudinally extending carrier member so as together they completely cover one surface thereof and join along a line extending longitudinally of that surface, the lateral edges of the carrier member and at least the marginal regions of the other surface of the carrier member being also directly covered by the extruded flexible covering material, at least part of this material being in the relatively soft form,
- the material in the relatively soft form on the said one surface additionally being extruded to provide a beading extending longitudinally of the carrier member parallel to the said line,
- the material on the said other surface additionally being extruded to provide ribs extending longitudinally of the carrier member parallel to the said line,
- the said regions being such that, with the carrier member shaped into channel form, the outside surface of one side wall of the channel so formed is covered by the material in the relatively soft form, the beading runs along this outside surface, the outside surface of the other side wall of the channel is covered by the material in the relatively hard form, and the gripping ribs run along the inside surfaces of the side walls of the channel.
A channel-shaped sealing strip, comprising
- a channel-shaped metal carrier member, and
- flexible material in channel shape and extruded directly onto the outside surface of, and at least part of the inside surface of, the carrier,
- the flexible material on the inside surface of the carrier being extruded to define gripping ribs which are integral with the flexible material on the inside surface of the carrier and which extend respectively along the two inside facing walls of the channel and project towards each other for assisting in retaining the sealing strip on a mounting flange,
- the said ribs on the respective walls of the channel being of different hardnesses.
Dependencies are inferred from the claim text.