American Dryer Corp. AD-400 - Manual (Page 32)

C. AUTOMATIC LINT REMOVAL SYSTEM
The AD-400 dryer incorporates a lint removal system which captures any lint in the dryer's air stream
and deposits it into a mesh bag. The system is made up of a lint collecting screen, rotating vacuum arm,
lint fan/motor, and the mesh bag.
1. Lint Collecting Screen
When the heated air passes through the load in the tumbler, it picks up moisture and lint from the
material. This lint-filled, moist air then passes through the lint collecting screen and collects on top of this
stainless steel mesh screen, located in the dryer base section.
The lint screen assembly can be removed from the dryer by opening the rear base access panels and
sliding the screen out the back of the dryer.
2. Rotating Vacuum Arm
A vacuum arm rotates on top of the lint collecting screen, drawing up the accumulated lint and
depositing it into the mesh bag. The rotating arm spins at a speed of one revolution every 7-1/2 minutes
and is driven by a 3/8-inch pitch chain and a parallel shaft speed reducer connected to a gear motor.
3. Lint Fan
The lint fan draws air through the vacuum arm which draws the accumulated lint off the screen. The fan
then blows this lint into the mesh bag. The lint fan is an 18-inch diameter pressure blower wheel which is
spun at 3,450 rpm by a 3 hp motor.
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4. Mesh Bag
The lint collection bag is made of fine mesh cloth that is attached to a steel mounting collar. When the
bag needs to be emptied simply pulled out of the dryer, and replaced with the second bag supplied with
each dryer. The clogged bag can now be emptied, without delaying the next drying cycle.
5. Lint Screen Mechanism Switch
This switch insures that there is proper tension on the vacuum arm drive chain. A loose or broken chain
will cause this switch to open and the computer display to show "SCREEN FAULT." The proper tension
on the chain is maintained by the chain tensioning spring. Spring tension can be adjusted by a threaded
nut assembly.
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