Topic summary
Gatefold sleeve
Extracted from the Wikipedia article Gatefold.
Gatefold sleeves were also frequently used when an album contained more than one record, with Bob Dylan's 1966 double album, Blonde on Blonde being an early example of a multi-LP album to be released in a gatefold. Typically, double albums would feature one disc on each half of the cover, with larger albums either placing multiple LPs in one sleeve or using larger gatefolds. While some multi-LP releases (particularly those issued during the vinyl record's market dormancy from 1988 to 2007) would either package the discs in a simple sleeve or sandwich the records between two cards and shrink wrap, the prominence of gatefold for multi-LP albums led it to become the most common form of packaging for them.