US Patent 9187949 Spacer joint structure

A spacer assembly has a first end and a second end. A first elongate strip extends from the first end to the second end and a second elongate strip is spaced from the first elongate strip, and also extends from the first end to the second end. A sealant is disposed between the first end and the second end and a first flap protrudes from the second end and overlaps a portion of the first end. In a variety of embodiments a primary seal is defined between the first end and the second end and a flap protruding from the second end and extending over the first end defines a secondary seal.