Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1993-01-20
1994-09-27
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156105, 156107, 156109, 156163, 15658391, 156556, B32B 1706, B32B 3116
Patent
active
053504690
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a process of assembling insulating glass panes, wherein an interior space is provided between pairs of glass plates, which are spaced apart and adhesively joined along their edges by a framelike spacer and which during their assembling are in contact on their outside surfaces with positioning surfaces, and wherein said interior space are filled with a gas other than air, in that
at least one of the glass plates is elastically flexed along an edge of the glass plate,
the spacer is attached to one of the glass plates (hereinafter called the "first" glass plate) before or during or after the flexing of one of the glass plates,
the spacer is attached to the other glass plate (hereinafter called the "second" glass plate) while the flexing is maintained to keep open an access opening to the interior space between the glass plates,
the gas is admitted to the interior space through the access opening thus provided, and
the access opening is displaced in that the resilient flexing is eliminated, and to an apparatus for assembling insulating glass panes wherein an interior space is provided between pairs of glass plates, which are spaced apart and adhesively joined along their edges by a framelike spacer and wherein said interior space is filled with a gas other than air, comprising
backing means for supporting and positioning glass plates,
retaining means, which are parallel to the backing means and arranged at a variable distance therefrom and serve to retain and position one of the glass plates at a distance from the other glass plate, wherein either the backing means or the retaining means or both define a positioning surface, which is intended to contact the outside surface of one glass plate and in which the forward surface of an elongate suction device is disposed, which is directed toward the glass plate, and
means for supplying the gas.
BACKGROUND OF THE INVENTION
Such a process and such an apparatus are described in WO 89/11021. In the known process two glass plates, which have been assembled to form an insulating glass pane, are temporarily provided with an access opening to the interior space between the glass plates in that one of the glass plates is resiliently flexed before or after the assembling of the glass plates. To that end the known apparatus is provided with vacuum cups, which are arranged in a vertical striplike recess in a wall and are adapted to be extended as far as to the forward surface of the wall and to be retracted parallel to themselves so as to be disposed some millimeters behind the forward surface of the wall. The wall itself is provided with holes, which are regularly distributed over the surface of the wall and through which air can also be sucked, to retain and position the glass plate on the wall. The glass plate which is gripped on both sides because air is sucked through the holes in the wall is caused to bulge in a strip-like area by the action of the suction cups in the striplike recess in the wall and high flexural stresses are thus produced in the glass because the sense of curvature is reversed several times in the flexing range. Owing to the high flexural stress it is difficult to flex thick glass plates and any microcracks existing in the glass plate may cause the glass plate to break whereas such cracks would not become apparent unless the glass plate was flexed. In accordance with WO 89/11021 the stresses can locally be alleviated in that the wall has a curved surface in a region which adjoins the recess on both sides so that there is a gradual transition from the planar portion of the wall into its recess and the steepness of the curvature at the edge of the recess can be decreased although the sense of curvature of the glass plate is still reversed several times.
In the prior art it has also already been proposed to flex the glass plate along one of its edges. But it has not been stated what apparatus is to be used for that purpose.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a process and a
REFERENCES:
patent: 3842567 (1974-10-01), Zwart et al.
patent: 4248656 (1981-02-01), Hofmann
patent: 4356614 (1982-11-01), Kauferle et al.
patent: 4369084 (1983-01-01), Lisec
patent: 4911779 (1990-03-01), Lenhardt
Bogner Uwe
Lenhardt Karl
Ball Michael W.
Lenhardt Maschinenbau GmbH
Lorin Francis J.
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