US Patent 9279234 Door system for a machine

A door system includes a window and a door frame. The door frame includes a first panel and a second panel. The first panel includes a first outer portion and a second outer portion. The first outer portion has a first outer leg, an intermediate portion, and a second outer leg that together define a cavity. The second panel has a first inner portion, a lip portion and a second inner portion. The first inner portion is joined to the second outer portion of the first panel. The second inner portion has a first inner leg and a second inner leg that together define a seal channel wall extending within the cavity. The lip portion includes an offset portion extending in a direction opposite to that of the seal channel wall.