(57) A wire advancement device (90) and a method in a rotary stapling machine which wire
advancement device comprises a wire source (91, 92), an advancement system (93, 94)
and a driving motor (95) arranged so that wire (T) from the wire source is continuously
advanced via the advancement system to a first and a second wire introduction assembly
(41, 42) mounted in a staple pick-up zone (31) in the rotary stapling machine, and
that the wire introduction assemblies are provided with cutting edges that co-operate
with the corresponding cutting edges of stapling forks (21, 21'), the cutting edges
being arranged to cut off a length of wire advanced to the wire introduction assemblies
(41) and forming a staple blank at each revolution the stapling fork (21) passes the
wire introduction assembly (41), as well as that guide means (43, 44) are arranged
to allow that the first wire introduction assembly (41) only delivers staple blanks
to one of the stapling forks (21) and to allow the second wire introduction assembly
(42) to only deliver staple blanks to the other one of the stapling forks (21') by
the guide means (43, 44) providing a displacement of the respective wire introduction
assembly (41, 42) in the direction away from the stapling cylinder to allow free passage
of a stapling fork (21, 21').
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