1 shown in fig1 and 2 is fitted with a plurality of sequentially mounted reed dents 2 a u shaped recess is present approximately centrally in the reed dents 2 which together constitute a guide duct 3 for a filling the reed dents 2 are affixed in a cross sectionally profiled upper and a lower bar namely in an upper u channel 4 and in a lower u channel 5 in both the upper u channel 4 and in the lower u channel 5 the reed dents 2 are kept apart from each other a predetermined distance by so called connecting spirals 7 8 together with one connecting spiral 7 and 8 and retention bars 9 and 10 the reed dents 2 are bonded into the upper and lower u channels 4 and 5 respectively the lower u channel 5 is affixed by a key 11 and screws 13 to a batten beam 12 the batten beam 12 is affixed in known manner by batten arms not shown to a batten shaft not shown extending parallel to the batten beam 12 in addition an elongated connecting blade or brace element 14 is mounted on the reed 1 and extends substantially in the longitudinal direction a of this reed 1 and because it is longitudinally inextensible and resists bending under longitudinal compression it prevents said reed from moving in said direction a relative to beam 12 in this embodiment the connecting blade 14 is mounted on the filling insertion side of the reed 1 the connecting blade 14 is made of steel for instance and its thickness in the transverse direction b is roughly 2 mm its height is about 15 mm the connecting blade 39 s length is about 100 to 200.