Door provided with a curtain which is raisable by winding and has an improved lateral tightness
a curtain and door technology, applied in the field of sealing and to doors, can solve the problems of inability to completely satisfy, inability to secure, end up being worn, and lateral tightness of sealing elements, and achieve the effect of low leakage rate and easy installation and replacemen
Inactive Publication Date: 2010-01-14
NERGECO
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- Abstract
- Description
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Benefits of technology
[0014]The invention aims to solve the many drawbacks of the prior art and more specifically aims to provide lateral sealing for a door provided with a curtain which is raisable by winding, this sealing guaranteeing a low leakage rate while at the same time being easy to install and replace.
[0023]According to an advantageous feature of the door, the curtain has a continuous flattened lateral edge obtained by high-frequency welding. This arrangement makes it possible to create a linear contact between the curtain and the sealing profile.
Problems solved by technology
A problem which these doors have been unable to solve in a completely satisfactory manner, however, is that of their lateral tightness when they are in the closed position.
A significant drawback of this manner of sealing provision stems from the fact that when the operations of winding and unwinding the curtain are taking place, the sealing elements rub against the slideways and end up becoming worn.
The consequences of this are doubly detrimental.
Firstly, the worn sealing elements no longer performing their function have to be replaced.
All these operations are therefore long and thus make the room inoperative, since, on account of these operations, the curtain has been detached and does not provide any closure function.
Secondly, the rubbing of the sealing elements against the door posts produces particles which contaminate the room whose access is controlled by the door.
Method used
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[0032]With reference first of all to FIG. 1, it can be seen that the door has two lateral posts 2 which border an opening made in a partition wall. A bracket 3 is placed at the upper end of each post. These two brackets 3 support a shaft which, in the example represented, is concealed by a transverse housing 4.
[0033]A curtain 5 is secured to the shaft. The curtain 5 consists of butt-welded horizontal strips of flexible material.
[0034]It will also be observed that the curtain 5 has stiffening bars 6.
[0035]As can be seen from FIG. 2, which shows a post 2 in cross section, this post is provided on its face directed toward the curtain 5 with two wings 8 bounding a slideway 9 between them. Depending on the particular case, the wings 8 bounding the slideway may form integral parts of the posts 2, for example in the case of extruded posts as can be seen from the drawing. In other embodiments, these wings may also be added as separate items to the posts 2.
[0036]Each lateral edge of the curt...
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A door including two lateral posts each having a slideway bounded by two wings, a transverse element connecting upper ends of the lateral posts, a flexible curtain having lateral edges engaging in each of the slideways, and means for winding the curtain into a door-opening position, where each of the slideways is equipped with a sealing profile having a back wall and two lateral walls substantially forming a U-shape, each of the lateral walls bearing against the wing which is adjacent to it.
Description
CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a continuation under 35 U.S.C. 120 of U.S. patent application Ser. No. 10 / 582,466 filed on 12 Jun. 2006 under 35 U.S.C. 371 as the national phase of international patent application number PCT / FR2004 / 03189 which was filed on 10 Dec. 2004 claiming priority to French patent application serial number 03.14528 filed on 11 Dec. 2003, all of which said applications are herein incorporated by reference in their entirety.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates to a seal and to a door which is provided with a curtain which is raisable by winding, having improved lateral tightness.BRIEF DISCUSSION OF RELATED ART[0003]Certain industrial activities, for example in the pharmaceutical, agri-food and electronics sectors, must be carried out in rooms with a controlled atmosphere whose quality has a direct influence on the quality of the products or of the operations taking place therein. These rooms are gene...
Claims
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Login to View More IPC IPC(8): A47H5/02E06B9/13E06B9/58
CPCE06B9/58E06B9/13
Inventor KRAEUTLER, BERNARD
Owner NERGECO