Conveyors: power-driven – Conveyor having impinging fluid to feed – shift or discharge... – Having cleaning means
Patent
1993-03-19
1994-07-26
Valenza, Joseph E.
Conveyors: power-driven
Conveyor having impinging fluid to feed, shift or discharge...
Having cleaning means
198817, 1988361, 1988611, 156107, 156109, 156556, B65G 4500, B65G 2110
Patent
active
053320808
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an apparatus for conveying insulating glass panes, comprising a horizontal conveyor, which on an endless conveying element has supporting surfaces, on which the insulating glass panes stand, and backing means, which extend above the horizontal conveyor and are parallel thereto and define a plane of travel for the panes by means of one or more backing elements, which are contacted by the insulating glass panes standing on the horizontal conveyor. Such an apparatus is known from German Utility Model 80 27 173.
Apparatuses in accordance with the invention are used in production lines for insulating glass in that region in which the semi-finished insulating glass pane is handled, which in most cases consists of two or three individual glass plates, which have been assembled together with one or two spacer frames, which has or have been coated on both sides with an adhesive composition. Such a semi-finished insulating glass pane has around its periphery an edge gap, which is filled with a sealing material, which is initially pasty and subsequently hardens and serves to establish a durable, strong bond between the individual glass planes which constitute the insulating glass pane and to seal the interior space of the insulating glass pane against an ingress of moisture. Thiocols and polyurethane are mainly used as sealing materials.
PRIOR ART
For the sealing of the edge gap of semi-finished insulating glass panes, the production lines comprise a sealing station, in which the insulating glass panes are sealed by means of one or more nozzles, which are moved along the edges of the panes (German Patent Specification 28 16 437). The apparatus in accordance with the invention is mainly intended for use in such a sealing station.
The apparatus known from German Utility Model 80 27 173 comprises a horizontal conveyor that comprises two endless chains, which are driven in synchronism and are parallel and carry pairs of oppositely disposed supports and pressure jaws. The insulating glass panes stand with their bottom edge on the supports, which extend only across a part of the insulating glass panes from their outside edge so that the edge gap remains free. The pressure jaws ensure that the insulating glass panes do not slip from the supports during the conveyance and that a slip does not occur. To permit a conveyance of insulating glass panes which differ in thickness, one of the conveying chains and the reversing sprocket wheels around which said chain is trained can be displaced at right angles so the direction of conveyance and to the axes of rotation of the reversing sprocket wheels.
To prevent a tilting of the insulating glass panes from the horizontal conveyor, backing means are provided above the horizontal conveyor and the insulating glass panes lean against said backing means. In the apparatus known from German Utility Model 80 27 173 a row of backing rollers are provided, which are adjustable in height and which support the insulating glass pane near its top edge.
The supports of the known apparatus extend to some extent under the insulating glass panes from its outer edge but leave free the edge gap. It is desired thus to prevent a taking up by the horizontal conveyor of some of the pasty sealing material which has been filled into the edge gap. But the sealing material may often cover also the bottom edge of the glass plates of which the insulating glass pane is composed and in that case the horizontal conveyor will take up some of the pasty sealing composition and will transfer part of that composition to succeeding insulating insulating glass panes. By means of the pressure jaws, sealing material which protrudes from the edge gap may even be transferred to the outside of the insulating glass panes. A further disadvantage of the known apparatus resides in that splinters may be detached from the bottom edge of the insulating glass panes because the insulating glass panes are clamped between the pressure jaws and particularly because the edges of the glass plates
REFERENCES:
patent: 4194300 (1980-03-01), Swanson et al.
patent: 4231464 (1980-11-01), Neilson
patent: 4422541 (1983-12-01), Lisec
patent: 4911779 (1990-03-01), Lenhardt et al.
patent: 5027941 (1991-07-01), Lenhardt
Bernhardt Rudolf
Lenhardt Karl
Lenhardt Maschinenbau GmbH
Valenza Joseph E.
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