DE2558818A1 - SEALING STRIP - Google Patents

Description

PATENT LAWYERS

DiFL.-lNG. ALEX STENGER

D-400O DÜSSELDORF X DIPL.-ING. WOLFRAM WATZKE

Malkastenstrasse 2 "". . . " ... ,, ~ DIPL.-ING. HEINZ J. RING

2bbÖo 1 8

Our reference: χ _ο ^ 2 ^Date: December 22nd, 1975

DRAFTEX DEVELOPMENT AG, CH - Ö3OO Zug, Schönbühl 3

Sealing strips

The invention relates to a flexible tape for use for pull-through barrier seals, folds, flange covers (for Covering welded flanges), especially in vehicle constructions. Such strips are shown below commonly referred to as "sealing tapes".

Known sealing tapes contain metal supports (consisting of a series of U-shaped metal tape elements) that are in rubber or embedded in plastic. In practice, such bands are arranged over flanges or the like, which around the door openings in vehicle bodies. The sealing tapes cover and protect the flanges and can additionally wear pull-through lock seals that extend over the outside of the duct that the door is for closes the opening.

In order to obtain an effective seal, it must be ensured that drafts and moisture cannot be bypassed Flange can penetrate into the inside of the channel.

To prevent this, attempts have been made according to a known embodiment, the inner walls of the channel with flexible ribs that extend in the longitudinal direction of the

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Channel with a sealing engagement opposite the sides of the FlarBBhes extend.

Anyhow, such ribs do not allow a satisfactory effective one Poetry. For example, if the splash does not have flat sides (e.g. by welding or similar), the ribs cannot be in continuous contact with the flange. This leads to the entry of drafts or moisture.

The invention is based on the object of creating an improved channel-shaped sealing tape. Another job The invention consists in creating an improved channel-shaped Sealing tape that allows a more effective seal against drafts and moisture.

This task is achieved with a channel-shaped sealing tape by a layer of heat-sensitive sealing compound on the base of the Channel and an electrical resistance lead wire embedded in the sealant, the temporary electrical heating the sealing compound is used, when the sealing tape is arranged on the flange, to the nature of the sealing compound to modify and thereby create a seal of the flange, solved.

The following is a sealing tape according to the invention described using an example, without the invention being limited to this example. Show it:

Fig. 1 is a perspective view of the sealing tape;

Figure 2 is an enlarged cross-section of the tape on a mounting flange.

FIG. 1 shows a sealing tape 5 with a channel-like shape. figure 2 shows the sealing tape in more detail and mounted on the flange 6. As can be seen from Figure 2, the sealing tape contains

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tied a metal beam b. The Mevallcra ^ sr is made of one relatively stiff material, but shaped so that it is fairly flexible over the length of the channel. For example, it can be a series of U-shaped metal bands included, each arranged at a short distance from one another and either completely separate from one another or only are connected by a thin flexible link. However, other forms of metal supports are also possible. Of the Metal carrier 8 is completely embedded in flexible material 10, the z «B. Can be rubber or plastic material and over the Metal carrier 8 can be extruded.

The flexible material is shaped to form two ribs 12 which extend along the inside of the legs 1 and 5B of the channel.

In addition, the sealant 14 is disposed on the base material of heat-sensitive mastifiziertem 5C of the channel and into the sealing mass 14 is a erstrekkender longitudinal wire Ib of relatively high electrical resistance is embedded. The sealant 14 is semi-solid so that it will hold itself to the bottom of the channel.

The sealing compound 14 can either be a heat-softening compound or a heat-vulcanizable or a heat-solidifying one Be mass.

In practice, the sealing tape 5 is arranged over the flange 6, such as around a vehicle door opening to cover the flange. The ribs 12 contact the opposite sides of the flange 6 and help prevent the sealing tape from being removed. If heat-softening sealant 14 is used is, the sealing tape is arranged on the mounting flange so that the edge 20 of the flange 6 the Sealant 14 touches and an electric current then

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is sent through the lead wire 16. This creates sufficient heat to soften the sealant 14, and by applying pressure to the tape, the flange is pressed into the softened sealant, which then hardens, causing the lead wire is de-energized. This achieves a very effective seal around the edge 20 of the flange 16, with the entrance water around the flange is prevented.

If instead it was a heat-vulcanizable sealant is used, the sealing tape is arranged on the mounting flange 6 that the edge 20 of the flange 6 is extends into the sealant 14. Then an electric current is passed through the electric conductor wire 16, which generates sufficient heat for the polymerization of the sealant 14 so that it is vulcanized and a very effective seal around the edge 20 of the flange 6 is ensured, so that the entry of water around the flange is prevented.

An example of a suitable heat-softening (thermoplastic) Sealant is:

Material wt -.%

Esso Butyl O65 100

Amorco Chemical Co. Indopol H 1900 40

Oil Furnace Black F.E.F. 25th

Ground Whiting 80

Finely divided silica 30

An example of a heat-vulcanizable sealant is a quick-vulcanizable rubber or a synthetic one rubber-like sealant, ζ «Β. Chloroprene.

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The sealant 1-; .: ΐΐι si eft along the gesaraten or a portion of the length of the sealing tape, with the lead wire 16 extending correspondingly in length.

The sealing tape can have a tubular sealing fold mounted on the outside of one of the legs 5A, 5B, which extends along the flange to form a seal for a door, for example.

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Claims (5)

Expectations : /1.ychannel-shaped sealing tape, marked by a layer of heat sensitive sealant (14) at the base (5C) of the duct and one in the sealant (14) embedded electrical resistance lead wire (16), the temporary electrical heating of the sealant (l4) is used when the sealing tape (5) on the splash (6) is arranged to modify the nature of the sealant (14) and thereby seal the flange (6) to effect. 2. Sealing tape according to claim 1, characterized in that the heat-sensitive sealing compound (14) is a mass which softens when heated so that it flows over the flange (6) and solidifies when cooled. J. Sealing tape according to claim 1, characterized in that the heat-sensitive sealing compound (14) is a heat-vulcanizing compound which is initially soft to flow over the flange (6) and then vulcanized with the application of heat. 4. Sealing tape according to one of claims 1 to 3, characterized in that that on the flexible material that runs along the inside of the legs (5A, 5B) of the channel, inwardly directed ribs (12) are attached to flatten the flange (6) by clamping. 5. Sealing tape according to one of claims 1 to 4, characterized in that that a metal support (8) is embedded in the flexible material (10) to form the channel " 609829/0567