Patent ID: 8905397

Claim:
A selection module for separating envelopes one-by-one from a stack of envelopes and for transporting them downstream, wherein said selection module comprises: a plurality of selector rollers; and a plurality of articulated guides co-operating with said plurality of selector rollers to select said envelopes one-by-one and to transport them downstream along a horizontal transport path, wherein each of said plurality of articulated guides comprises lower and upper parts ( 120 , 122 ) connected one to the other by a first extremity ( 120 a , 122 a ) crossed by a common pivot connection ( 16 ), the respective second extremities ( 120 b , 122 b ) of said lower and upper parts of said articulated guide being adapted to pivot about first and second pivot axis ( 18 , 22 ) in opposition to first and second resilient return means ( 20 , 24 ) as the envelopes pass over the selector rollers, wherein said second pivot axis is offset downstream relative to said first pivot axis and said second resilient return means forms at a rest position an inclination angle of about 45° relative to the horizontal transport path and wherein the lower part ( 122 ) of the articulated guide comprises a pad ( 122 c ) for increasing the friction effort on the envelope.