US006068720A [ii] Patent Number: 6,068,720  Date of Patent: May 30,2000
A method of manufacturing insulating glass units is disclosed that comprises delivering a succession of high temperature insulating glass units from an oven and a press, moving successive IGUs along a travel path with the major surfaces of each IGU extending substantially parallel to the major surfaces of adjacent IGUs, establishing an IGU cooling station on the travel path, moving the IGUs into heat exchange relationship with a fluent cooling medium at the cooling station to reduce the IGU temperature, and thereafter closing and sealing a vent opening of each IGU. Successive IGUs are moved along the travel path with their major surfaces disposed in substantially vertical planes and successive IGUs disposed in closely spaced relation. The cooling station comprises at least a blower for directing cooling medium onto IGUs moving through the cooling station. The blower directs cooling medium onto the IGUs in a direction parallel to the major surfaces. An inert gas source is connected to the IGU by a flexible hose and hose support that enable the IGU to fill with inert gas while being conveyed to the closure and sealing station. The vent port is closed and sealed as the IGU is being conveyed away from the cooling station. The vertical orientation of the IGUs while being conveyed, makes it quicker and easier to perform the sealing operation.
9 Claims, 5 Drawing Sheets