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Product
Information
RBW-1000
Brochure (PDF Format)
RBW-2000
Brochure (PDF Format)
RBW
Customer Worksheet
RBW-1000 Bustle Wheel Assembly
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Bustle Wheels
U.S. Automation
presents the RBW-1000 and RBW-2000 Register Bustle Wheel
Systems. Both models feature tool-less adjustment of the
bustle wheel head
assembly. Positioning of the bustle wheel can be
accomplished quickly and safely without the need of hand tools
which could fall into the press. All bustle wheel trunnions and threaded pivots are
precision machined for easy adjustment. All bustle wheel
head assemblies are anodized to help prevent corrosion.
RBW-1000 Features:
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Aluminum
Anodized Head Assembly
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Delrin Outer
Wheel For Long Life
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High Speed
Precision Ball Bearings Rated For 3000 FPM
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Aluminum Hub For
Increased Bearing Cooling
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Zinc Plated
Steel Mounting Bar
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Easy, Smooth
Adjustment Without Tools
Each Bustle
Wheel Assembly Includes:
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Bustle Wheel
Head Assembly (Number of heads vary with press size)
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Mounting Brackets (Side Frame Block or Shaft Mount)
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Zinc Plated
Steel
Mounting Bar
The RBW-2000
Air-Assisted Register Bustle Wheel System has all of the
features as the RBW-1000 plus the added advantage of air assist. A
small cushion of air floats the web over the top of the bustle
wheel. This allows the bustle wheel head to be positioned
over the top of a printed image area without marking. The
air-assist feature can be turned ON or OFF conveniently using the
control station located on the bar. When the air-assist feature is
turned off, the RBW-2000 can be used as a conventional bustle
wheel. RBW-2000
Features:
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All features of
the RBW-1000 plus;
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Air-Assisted
Bustle Wheel Head
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Bar Mounted
ON-OFF Controls
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Bar Mounted
Regulator Assembly
RBW-2000 Air-Assisted
Register Bustle Wheel Assembly
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Why
Use Bustle Wheels?
Bustle
wheels improve print-to-print color registration by reducing the
effects of paper fan-out on web offset presses. Fan-out is the physical lateral growth of the web
(and printed image) as it goes through the printing
process.
As the
web grows in size laterally, so to does the image area. If the
image area grows too large, there will be registration and fit
issues when overprinting the next color on top of the image
area.
In order
to reduce the effect of fan-out, bustle wheels are installed between
print units. There is typically a bustle wheel mounted in each
alley. By moving the bustle wheels slightly into the paper,
the paper will begin to bustle (dimple) causing the outer edges of
the paper to move inward. The inward movement of the paper
helps to fit the previous printed image to the next image that
will be overprinted. This greatly improves the fit of
the color-to-color register.
Fan-out
is not linear. Depending on the amount of moisture being
introduced into the paper separate adjustments are made
to each bustle wheel.
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