Thank you for visiting Dos Santos International

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.


In 1979 Joseph A. Dos Santos undertook a major study to develop a means of moving and elevating large quantities of bulk materials, including coarse products such as rocks, aggregate, coal, etc. at the steepest possible inclines. It was also his intent to use only existing and generally available hardware in order to achieve the most economically feasible and easily maintained high angle conveyor design.

Mr. Dos Santos conceived, researched and developed his sandwich belt design, with the help of a grant from the U.S. Bureau of Mines, while he was employed by a major American manufacturer of materials handling equipment. While such concepts had been tried over the years with mixed results, Dos Santos investigated & analyzed the many forces generated in this seemingly simple concept, and created the formulas which guaranteed the successful design of such equipment. The DSI Snake Sandwich Conveyor represents the ultimate achievement of this aim.

Mr. Dos Santos’ research articles have been published in world-wide journals.




What is a Sandwich Belt Conveyor?

A sandwich belt conveyor uses two conveyor belts, face-to-face, to gently but firmly contain the product being carried, hence making steep incline and even vertical-lift runs easily achievable.

DSI Snake Sandwich Conveyor Profiles

Snakes are available in widely ranging profiles of C and S-Shape. In any case, a long bottom belt approach is possible to the sandwich entrance, and discharge may be on the high incline or may be after the extension of the carrying belt beyond the mouth of the sandwich.

Sample DSI Snake Installations Worldwide

View DSI Snake Conveyors.kmz in a larger map


Click thumbnails along side of main image to view larger versions of each

Sandwich Belt Conveyor Design



DSI Snake Sandwich conveyors offer the following advantages:

Dos Santos-design sandwich belt conveyors have been proven in more than eighty successful conveyor systems installed by his previous employers throughout the world over the past eighteen years. Dos Santos’expertise will continue to advance the state of the art and assure our clients of the finest conveyor systems available today.

The DSI Snake Sandwich conveyor is the most reliable and economical solution to your steep angle and vertical high angle conveyor requirements.

Sandwich Belt Conveyor Examples

Elevating from Silo to Silo

Elevating Wood Chips from Screen to Mill

Mobile Soft Loader For Ships and Barges

Elevating Trailer to Ship Loader

Elevating to Barn Type Covered Storage

Elevating to Dome Type Covered Storage
Elevating Ore From a Deep Open Pit