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19. Slide the Front Gripper Plate back into position.
20. Place Front Plate Spacers behind Front Plate, insert button head screws, then tighten.
Pressure Bar Adjustment
The pressure bar, when actuated by the seal cylinder, is forced against the front plate. The pressure bar
must be parallel to the front plate to avoid excessive wear of components. Please contact Advanced Poly-
Packaging Service for Pressure Bar adjustment instructions.
Note: Pressure bar adjustment should only be necessary after rod or bushing replacement.
Sealer Cylinders Adjustment
Flow controls operate the air flow which dictates the speed of the cylinder in an “in-and-out” motion that
brings the Pressure Bar against the front plate (Gripper Plate). Increasing the speed of the Pressure Bar
will increase production. But if the Pressure Bar moves in or out too fast, the Pressure Bar will “bang”
and excessive wear will occur. The inline Flow Control that controls the Pressure Bar Cylinder is located
on the tubing to the main center cylinder on the inner frame. See Figure 4-4.
The adjustment knob (B) controls the speed of the Pressure Bar INWARD (towards the front gripper
plate). To increase the speed of the Pressure Bar INWARD, turn the knob (B) counterclockwise. To
decrease the speed of the Pressure Bar INWARD, turn the knob (B) clockwise.
Note: There is no OUTWARD adjustment for the Pressure Bar.
The adjustment knob (A) controls the speed of the Heater Bar OUTWARD (away from the front Gripper
Plate). To increase the speed of the Heater Bar OUTWARD, turn the knob (A) counterclockwise. To
decrease the speed of the Heater Bar OUTWARD, turn the knob (A) clockwise. Adjust the speed of the
Pressure Bar so that it moves in and out rapidly, in a fluid manner, without causing the Pressure Bar to
"bang" in or out.
Note: There is no INWARD adjustment on the Heater Bar.
Pressure Bar (Rubber) Replacement
Located along the inside of the pressure bar is a strip of rubber, held on the pressure bar by a channel,
pressing on the edges of the rubber. The rubber compresses against the front (gripper) plate holding the
bag in place during sealing and bag tear-off. If the rubber becomes brittle, torn, gouged or otherwise
worn, it should be replaced to assure strong seals.
To replace the pressure bar rubber, simply pull one end of the rubber from the channel. The rubber will
come out of the channel quickly and easily. To install a fresh piece of rubber, press one edge of the rubber
into the channel, then the other edge. Work the rubber into the channel in small increments along the
length of the channel. See Figure 4-5 and Figure 4-6. If you used Teflon tape to cover the surface of the
rubber, place the Teflon on the rubber along its length. If the Teflon extends beyond the rubber, cut off
the excess.
Note: Teflon may be added to the pressure bar rubber if the bag sticks to the rubber after loading and
sealing. The bag may stick to the rubber if the product and bag are lightweight and if the rubber is
dirty.
Note: Frequently clean the rubber with alcohol to remove buildup of dirt or other contaminants.
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