Glass edge sealant curing system

A process for curing sealant about edges of an insulated glass unit comprising the steps of:

• a. moving an insulated glass unit having a leading edge, a trailing edge and front and back side edges to a first location and placing a back side edge adjacent a first heating unit;
• b. positioning a transverse heating unit in proximity to said leading edge and a second heating unit in proximity to said front side edge;
• c. heating the three edges to cure said sealant;
• d. removing said transverse heater from proximity to said leading edge;
• e. moving said insulated glass unit to a second position;
• f. positioning said transverse heating unit in proximity to said trailing edge of said insulated glass unit;
• g. heating said trailing edge to cure said sealant;
• and,
• h. conveying said insulated glass unit away from said second location.

System for curing of edge sealant comprising:

• a. a straight flow-through conveyor for conveying a stack of a plurality of insulated glass units from an entrance location, to a first location, to a second location, to an exit location;
• b. a heater means along one side of said conveyor at said first location, a moveable in and out heater means parallel to said side heater means, and a raisable and lowerable heater means having front and back heating units perpendicular to said path of travel;
• and,
• c. continuous power means connected to said heater means for energizing said heater means.

System for curing of edge sealant comprising:

• a. a straight flow-through conveyor for sequentially conveying a stack of insulated glass units from an entrance location, a first position, a second position, and an exit location;
• b. a first heater means positioned at a back side of said conveyor at said first position;
• c. a second heater means positioned at a front side of said conveyor at said first position, and adaptable to be moved toward and away from said conveyor;
• d. a third heater means having a leading edge heating unit and a trailing edge heating means unit, both extending across said conveyor and adapted to be raised and lowered to heat leading and trailing edges;
• e. controller means for operating said conveyor to place a first stack of insulated glass units at said first position, then controlling said second heater to position it adjacent a front edge of said stack and controlling said third heater means to position it adjacent a leading edge of said stack;
• and,
• f. said controller means further operating to connect said first, second and third heaters to a variable intensity of a continuous source of power to heat said edge sealant and cure same.