Baking & Snack - October 2006 - 79

PROCESSING TECHNOLOGY

ment without wasting fuel by drafting. Radiant heat loss
is minimized by stainless steel-clad insulated interior
doors. Air space between the inner and outer doors and a
double-insulated hood keep the oven exterior cool. These
systems have different automation options such as an automatic temperature control of each conveyor pass and
other customized control systems.

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MOVING THEM AROUND. Sanitary tortilla transportation throughout the process at high speed can be a tricky
operation, particularly when product is not cooked yet.
Thin sheets of masa are not easy to handle in high-speed
automated systems. The evolution of new materials has
provided a useful tool to the industry. A company in the
United Kingdom has developed several materials using
the resistant glass fiber Kevlar and
polyester enhanced with coatings,
namely Teflon or silicone, for resistance to extremes of temperatures,
nonstick properties and resistance
to biological environments. The resultant products are useful for highquality process conveyor belting. A
heat-resistant, nonstick conveyor
belt is very useful for flat bread bakery lines such as tortillas and pizza.
These materials are compatible with
today's tortilla industry demand for
speed and efficiency.

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For more information, see Page 137

84 / BAKING & SNACK / October 2006

TAKING A CLOSE LOOK. Automated tortilla inspection/rejection
systems have also been improved to
provide better control and stay in line
with the improved high-speed automated systems. The president of a
Canadian-based equipment supplier
recommended its tortilla inspection
system that automatically measures
the size, shape and color characteristics of baked tortillas and other flat
products such as pizzas and wafers.
This system performs 100% inspection on all products, and defective
products based on user-defined criteria are automatically removed. In
addition to the basic parameters such
as size, shape and color information,
the system also has the capability to
detect product specific defects such
as folds, bites, tears, holes and burn
marks. An integrated rejection array
blows the defective product through
a conveyor gap. This system can be
installed directly in-line with the
production conveyors and includes
an overhead product sensor array
with top lighting, an integrated system conveyor, a user-configurable
data analysis and storage module
and a VGA touch-screen for easy operator interaction.
Another western-based manufac-

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Baking & Snack - October 2006

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