91 or 109 respectively may reach over the total width of the work table however in wide operating tables a plurality of slide pieces are distributed over the total width of the work table which are in affective connection with each other either pneumatically or electrically so as to affect an even transporting of the face structure a after a finished joining operation the fig8 and 9 show details of a combined retaining and transport device for face structure a on a jointer table 13a which is differently designed than the jointer 13 the face structure is shown which on the left side shows the existing helix 0 the last addded first helix 1 and the further added second helix 2 the insert wires 3 as already explained are indicated in the overlapping areas after a finished joining operation the face structure a is further transported by one insert wire distance 5 according to fig8 to the right the combined retaining and transporting device essentially consists of the two pin bars 121 and 126 on which the arresting transport pins 120 125 are mounted fig9 shows the pin bar 121 in the direction of arrow a of fig8 steel pins are used for the pins 120 or 125 respectively which are coated with lead the pins have a pin distance 128 a plurality of pin bars 121 126 are provided adjacent to each other across the width of the joining table 13a so that assurance is given that the face structure a can be transported by one insert wire distance 5 after the joining operation is finished in the shown embodiment the pin bars 121 126 are connected by means of connecting rods 123 or.