The Chicago Bears have signed Jake Laptad as their new long snapper.  Laptad inked a three-year contract and will take over the duties for Patrick Mannelly, who was placed on injured reserve Monday with a torn ACL.  Mannelly, who has played in a franchise-record 215 games for the Bears, was hurt during this past Sunday's game against San Diego.  Laptad, also a defensive end, spent  the 2011 preseason with the Bears after signing as an undrafted free agent out of Kansas.  The Bears also signed offensive tackle Josh Davis and cornerback Joshua Moore to the practice squad.  Moore appeared in three games for the Bears last year.