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Welcome to Dos Santos International, LLC where we are the foremost authority on high angle conveyor applications and design of sandwich belt type high angle conveyors. We invite you to learn more about our most reliable and economical solution for your steep angle and vertical high-tonnage conveying requirement, our Snake Sandwich Conveyor.

DSI was founded on its extensive worldwide experience in sales, engineering, and construction of bulk materials handling systems and equipment. This has included major contributions that have expanded the range of bulk handling and transport solutions. Most notably advances in sandwich belt high angle conveyors have led to their worldwide utilization. The expertise of DSI spans a wide range of materials handling systems and equipment including high angle conveyors, high powered, high capacity, high lift slope conveyors and long overland conveyors utilizing the very latest technology.

Dos Santos International is the ideal consultant and supplier for this technology and we welcome you to browse our pages and learn more about our expertise and worldwide presence. We look forward to the opportunity to fulfill your materials handling needs.

DSI Adder Snake, Low Angles to High Angles and Back with No Transfers

Location: Docks, storage sheds, long overland systems
Challenge: Economically and cleanly elevate material at some point along a mostly conventional-angle conveyor system
Solution: The DSI Adder Snake (patent pending)
Scope: Limited only by available conveyor equipment

Figure 1: Complete Adder Snake Arrangement

Figure 2: Sandwich conveyor fed by low-lift tripper

Sandwich belt high angle conveyors have long been known as the best solution for tight spaces where a steep lift is required to maintain a small footprint. However, applications are also quite common in which a large footprint is available, but a high angle is needed in just a small portion of the conveyor path. Because a sandwich belt system uses a wider belt to achieve the same conveying rate as a conventional conveyor at the same speed, in an application such as that described above, the question must be asked: Should you extend the tail of the sandwich belt, or should you break up the path into two separate conveyors, in which a narrow conventional conveyor discharges on to the wider Sandwich belt system?

For instance, a tripper may travel horizontally along the length of a dock to feed a perpendicular shiploader. In cases where the shiploader is at a considerably higher elevation than the dock conveyor, a standard tripper would require that the dock conveyor and dock be much longer than otherwise necessary, as its uplift would extend quite far back from its discharge pulley. Historically, the solution in this case would be to design

Figure 3: Adder Snake sandwich entrance
a much lower-lift tripper, which would then feed on to a Sandwich Belt High Angle Conveyor. While this is a perfectly viable solution, which has been executed in the past as shown in Figure 2, it would be preferable to eliminate the conventional-to-sandwich transfer if possible.

The DSI Adder Snake (see Figure 1 and Figure 3), which is currently patent pending, solves the problem by swallowing the narrower conventional belt (Item 1), along with its material, into the two wider sandwich belts (Items 2 and 3). This allows the material to enter the sandwich belts with minimal disturbance and without the energy loss and additional equipment required for a standard transfer.