usi CRL 40 Instruction Manual page 13

7.8 It is essential that the bottom (moveable) idler bar is locked into the run position. With both hands
on each end of the idler bar push it gently towards the back of the machine until it locks into place.
7.9 Replace feed table and place feed plate in position. (See Fig.7.4)
Fig 7.4 POSITIONING FEED PLATE
7.10 Select "Forward".
7.11 Place metal feed plate onto feed tray and push it against the film webs and between the front nip
rollers. After an initial resistance, the rollers should carry the plate through the machine and clear
the rear back rollers. Ensure it clears the back rollers cleanly, cut it from the film web and remove
the film from the feed tray.
7.12 There can be a tendency, especially for thinner gauge films or with imbalanced tensions, for the
finished laminate web to back up as it exits the laminator to a degree that it is grabbed by the
revolving back rollers and becomes wrapped around them. To minimise the occurrence of wrap-
around make sure the laminated web can't double back into the back rollers by pulling it away as it
emerges. To STOP the motor, switch to STOP position.
7.13 Assess the operation. Satisfy yourself that the film webs have not fouled during thread-through.
(See Section 9.1, Wrap-arounds, Page 21). Re-start the forward movement and gradually tighten the
brake control on the film mandrels (clockwise). Only enough brake is required to ensure that the
web of film smooths out and lays flat on the second half of the heat shoes during lamination, the first
half of the heat shoe should normally have wrinkling or tunnels evident. (See Figs 7.5, 7.6, 7.7). It
is always good practice to operate with the minimum film tension required to flatten the film. Top
and bottom film tension must be even. An imbalance between top and bottom film tensions will
result in curl in the final laminate. Upwards curl (as it exits the rear pull rollers) indicates too much
tension on the top film roll and vice versa with downwards curl (See Section 9.2, Page 16).
Excessive overall tension can result in narrowing of the film (See Section 14.7, Page 29).
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