초록 ▼

A coffee roaster in the form of a rotating drum having internal baffles forming oppositely-pitched helical paths that drive tumbling coffee beans toward the center of the drum in one direction of rotation of the drum and toward the ends of the drum in the other direction of rotation of the drum, the

A coffee roaster in the form of a rotating drum having internal baffles forming oppositely-pitched helical paths that drive tumbling coffee beans toward the center of the drum in one direction of rotation of the drum and toward the ends of the drum in the other direction of rotation of the drum, the rotating drum being contained within a vessel and providing with a source of gas in the space between drum, the gas being hot enough to effect roasting of coffee beans.

대표청구항 ▼

A coffee roasting device comprising a stationary outer vessel; a single rotatable inner drum having a gas impervious wall positioned within and spaced from said outer vessel to form a hot gas space; an inlet through said outer vessel to pass hot gas into said hot gas space, and an outlet through sai

A coffee roasting device comprising a stationary outer vessel; a single rotatable inner drum having a gas impervious wall positioned within and spaced from said outer vessel to form a hot gas space; an inlet through said outer vessel to pass hot gas into said hot gas space, and an outlet through said outer vessel to remove gas from said hot gas space; a closable green coffee bean inlet into said inner drum; first internal baffles forming a helical path adjacent a first axial length of a rotating wall of said inner drum, said helical path pitched to drive particulate material in said drum in a first axial direction upon rotation of said drum; second internal baffles forming a helical path adjacent a second axial length of rotating wall of said inner drum, said second baffles pitched to drive particulate material in an axial direction opposite said first axial direction upon rotation of said drum; and means to reversibly rotate said inner drum whereby green coffee beans tumbled within a driven alternately toward the ends of said inner drum and toward the center of said inner drum and in contact with said rotating wall.