Weft thread cutting mechanism for shuttleless looms

A weft thread cutting mechanism for shuttleless looms in which a weft thread is inserted into a loom shed by weft thread grippers travelling back and forth into and out of the loom shed, comprising scissors means for cutting the weft thread, comprising a fixed scissors blade mounted to a tilting arm drivable by an eccentric cam drive and a further scissors blade which is movable relative to the fixed scissors blade in response to the motion of the tilting arm, whereby said scissors means are tiltable in a plane perpendicularly to the weft thread insertion direction between a rest position and a working position, wherein said fixed scissors blade is located close to said loom shed, wherein said movable scissors blade (9) is located on that side of said fixed scissors blade facing away from the loom shed, said movable scissors blade further comprising a cutting edge and a clamping jaw (9a) next to said cutting edge, said scissors means further comprising a clamping plate (18a) cooperating with said clamping jaw (9a) of said movable scissors blade in an elastically yielding manner, and means for moving said movable scissors blade (9) and said clamping plate (18a) into an excess stroke position for moving the weft thread in a direction toward said weft thread grippers, said cutting mechanism further comprising a clamping arm (18) carrying said clamping plate (18a), means journalling said clamping arm (18) coaxially with said movable scissors blade (9), and reset spring means arranged for normally biassing said clamping arm (18) into a rest position.