Leon Frederick Borne of Pasadena;Md.;formerly of Belle Vernon;died suddenly Thursday;December 10;1981 at 10:28 p.m.  He was 34.  Mr.Borne was a member of Lynnwood Lutheran Church of Belle Vernon.  He had resided in Baltimore;Md.for the past year.  He was an employee of Ed Kane Furniture Movers of Baltimore.  Born in Monongahela Aug.17;1947;he was the son of Frederick and Elizabeth Webb Borne;who survive.  In addition to his parents;Mr.Borne is survived by a sister;Mrs.William (Bonnie) Walch of Charleroi.  Friends are being received at the Shelby D.Ferguson Funeral Home;700 Broad Ave.;Belle Vernon;on Sunday from 2 to 4 and 7 to 9 p.m.  Funeral services will be held Monday at 11 a.m.at the funeral home.  Burial will follow in Belle Vernon Cemetery.  The Shelby D.Ferguson Funeral Home is in charge of arrangements.