Dos Santos International: History of Sandwich Belt High Angle Conveyor

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 and coal — at the steepest possible inclines.

He investigated and analyzed the many forces generated in this seemingly simple concept and created the formulas that guaranteed the successful design of such equipment. Dos Santos International presents the DSI Sandwich Belt high angle conveyor as the result of that work — one design within high-angle sandwich belt conveyors, itself a steep-incline branch of mechanical conveying and belt conveyors.

How to read the footage

The equipment family serves mining and mineral processing, recycling and building materials applications, including mobile high-angle ship loaders. The footage works best for examining the visible process sequence, equipment interfaces, access and material route — a video cannot confirm conditions outside the frame or values that were never measured.

Separate direct observation from commentary. Record what the equipment does, where material enters and leaves, which components move and how an operator interacts with the system. Treat capacity, accuracy, containment, energy, certification and service life as manufacturer claims unless attributable test evidence backs them.

Engineering questions raised by the footage

• What feed distribution, rate and material trajectory enter the equipment?
• How are spillage, carryback, dust and displaced air controlled?
• Which belt, chute, vehicle or storage geometry constrains the layout?
• How can operators inspect, clean and isolate the equipment safely?

Answer these with representative material data. Particle size distribution, bulk density, cohesion, moisture, abrasion, temperature and hazard properties can change the response of equipment that looks identical on screen.

From footage to project review

Before selection, request the current data sheet, scope of supply, operating envelope, test method, maintenance requirements and exclusions for the offered configuration.

For a project review, compare the video with drawings and written process data. Confirm the upstream supply, downstream receiver, utilities, controls, cleaning method, safe isolation and response to credible faults. That turns visual discovery into a testable engineering inquiry.