Langmead and a brace from the influential Akinfenwa put Town into a commanding lead although perfectionist boss Aidy Boothroyd will be disappointed with the loss of a late consolation goal.
"I felt it was a comprehensive performance and we got what deserved," he told the official club website.
http://www.ntfc.co.uk/page/MatchReaction/0,,10425~2614200,00.html
Attention now turns to the big relegation clash at Dagenham & Redbridge on Tuesday. The Daggers lie three points below Northampton and will be desperate for victory on home soil.