Plus-size women’s clothing store Lane Bryant has closed its doors at Rockville’s Federal Plaza. But its space won’t be empty for long: Ann Taylor Factory, an off-price retailer typically found at outlet malls, is moving in. Ann Taylor, Lane Bryant and Loft are all owned by a division of Sycamore Partners, a private equity firm that doubled its retail portfolio last week with the purchase of Chico’s, Soma and White House Black Market. Ann Taylor is one of the smaller chains in this group, with about 200 locations — including a full-priced store at Westfield Montgomery mall and a factory store at Clarksburg Premium Outlets. At Federal Plaza, opening date is TBD.