Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Reexamination Certificate
1998-10-14
2001-03-06
Silbaugh, Jan H. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
C264S040500, C264S040700, C264S252000, C264S261000, C264S263000, C425S135000, C425S141000, C425S150000, C156S109000
Reexamination Certificate
active
06197231
ABSTRACT:
The invention relates to a process claim
1
and a device, especially for claim
15
.
When the edge joints of insulating glass panes are filled with sealing masses, especially the corners of the insulating glass panes are a problem since the sealing nozzle, when it arrives at a corner, usually travels beyond it, the emergence of the sealing mass from the sealing nozzle having to be interrupted. The sealing nozzle is then swivelled around an axis perpendicular to the plane of the insulating glass pane (for rectangular panes by 90 degrees) and then attached again to the edge of the insulating glass pane in the area of the corner, whereupon supply of the sealing mass is started again and the sealing nozzle is caused to continue to move along the edge of the insulating glass pane. In doing so on the one hand problems arise with exact proportioning of the sealing mass both upon ending and in restart of sealing so that in the corner area often either too much or too little sealing mass is introduced into the edge joint of the insulating glass pane. Furthermore, it is a disadvantage when the feed of sealing mass is interrupted since in the corner area this can lead to leaky sites or faults in the sealing.
Therefore the object of the invention is to devise a process and a device with which these defects can be avoided.
This object is achieved by a process with the features of claim
1
.
In the process as claimed in the invention neither feed of the sealing mass nor movement of the sealing nozzle nor movement of its axis which is aligned perpendicularly to the insulating glass pane is interrupted. The sealing nozzle therefore moves around the corner of the insulating glass pane, emergence of sealing mass from the sealing nozzle not being interrupted, so that on the one hand it is possible to work more quickly and on the other hand the aforementioned faulty sites in the seal cannot arise. Furthermore, proportioning inaccuracies which can occur especially upon interruption and restart of emergence of the sealing mass from the sealing nozzle are reliably prevented so that accurate filling of the edge joint can also be done in the corner area of the insulating glass pane.
This can preferably be further improved by acquiring the depth of the edge joint in the direction of motion in front of the sealing nozzle and by the volume of the edge joint in the corner area being computed based on the depth of the edge joint acquired before and after the corner area and during motion of the sealing nozzle around one corner of an insulating glass pane a corresponding amount of sealing mass being supplied. In this version of the process as claimed in the invention the required amount of sealing mass is accurately acquired and the feed of sealing mass can accordingly be more accurately controlled.
The path along which the axis of the sealing nozzle moves in the area of one corner of an insulating glass pane is preferably essentially arc-shaped, the path of motion for sealing nozzles which dip into the edge joint of the insulating glass pane running preferably within the outside edge of the insulating glass pane. For sealing nozzles which slide on the edges of the two glass panes which border the edge joints, preferably a path of motion of the axis of the sealing nozzle is chosen which in the area of one corner of an insulating glass pane is located outside the outside edge of the insulating glass pane. In both cases the sealing nozzle is elastically held adjacent to the edge of the insulating glass pane.
Also in the corner area, when the sealing nozzle therefore moves around one corner of the insulating glass pane without stopping, the relative speed between the sealing nozzle and the insulating glass pane and the current delivery amount of sealing mass are controlled (changed) such as is known from U.S. Pat. No. 4,973,435 A and U.S. Pat. No. 5,136,974 A in order to achieve the desired degree of filling of the edge joint with sealing mass.
As likewise known from the named documents, relative motion between the sealing nozzle and insulating glass pane is achieved by moving the sealing nozzle along the stationary insulating glass pane and/or by moving the insulating glass pane with the sealing nozzle stationary.
The process as claimed in the invention is as well suited for an automatic single nozzle sealing device as for automatic sealing devices with two or more sealing nozzles.
Since the path along which the axis moves in one embodiment runs within the insulating glass pane and thus the corner is essentially “cut off” and in another embodiment is located outside the peripheral contour of the insulating glass pane, therefore for example moves along a path which is loop-shaped in the area of the corner, conversely the sealing nozzle must move completely around the corner, the distance between the sealing nozzle and the axis becomes increasingly larger or smaller towards the corner and larger or smaller again following the corner until the sealing nozzle is flush A- again with the axis. This motion of the sealing nozzle relative to the axis can for example take place against the force of a spring. Alternatively it can also be provided that this relative motion takes place controlled by a process computer which for example uses as the control parameter the contact pressure between the sealing nozzle and the edge of the insulating glass pane or when the sealing nozzle dips between it and the spacer (frame) and increases the relative distance as the pressure rises, i.e. when the sealing nozzle moves towards the corner, and when the pressure decreases, i.e. when the sealing nozzle moves away from the corner, reduces the relative distance. Geometrical data of the insulating glass pane stored anyway can be used for this control.
Also described is a device for achieving the initially mentioned object which is especially suitable for executing the process.
Preferred and advantageous embodiments of the process and the device as claimed in the invention are the subject matter of the subclaims.
REFERENCES:
patent: 4234372 (1980-11-01), Bernhard et al.
patent: 4973436 (1990-11-01), Lisec
patent: 5136974 (1992-08-01), Lisec
patent: 5167756 (1992-12-01), Lenhardt
patent: 5319186 (1994-06-01), Lenhardt
patent: 5335012 (1994-08-01), Lisec
patent: 5876554 (1999-03-01), Lafond
patent: 5961759 (1999-10-01), Schubert
patent: 28 16 437 (1979-08-01), None
patent: 28 34 902 (1980-02-01), None
patent: 40 09 441 (1990-10-01), None
patent: 44 37 214 (1996-05-01), None
Eashoo Mark
Silbaugh Jan H.
Young & Thompson
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