(57) An insertion machine has a plurality of gripper arms (16), each gripper arm including
jaw members (24,26) between which inserts are engaged and from which engaged inserts
are released in precise placement upon a transport means. Each jaw (26) is actuated
by actuating means (28) acting through linkage means (30) to perform the engagement
and release operations. Upon insert engagement the activation of the actuating means
(28) is controlled to be dependent upon the operating speed of the insertion machine.
Upon insert release the activation of each actuating means (28) is controlled so that
release is delayed by three release time delay components A first release time delay
component is occasioned by a master presettable release delay means (322) which delays
the release operation actuating means (28) of all insert stations in accordance with
a preset input value A second release time delay component is dependent upon the operating
speed of the insertion machine A third release time delay component, which varies
from insert station to insert station depending upon insert size, is occasioned by
individual station presettable release delay means (338) which delays the release
operation of actuating means (28) for its insert station.
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