Finishing and abrasive tool
AssigneeJason, Inc.
InventorsTimothy J. J. Beechey, Mark K. Van Voorhis
Life of this patent
Estimating the term…
Abstract
A finishing star or spinner abrasive tool is formed of inner and outer packs of square sheets of abrasive cloth or sandpaper with the inner packs angularly offset from the outer packs on the mandrel axis. Each sheet is formed with discontinuous radial slits extending beyond an unslit center section around a center fastener forming the mandrel drive hole. The slits provide surface flexibility while maintaining sheet integrity as it wears to circular form. An optional backing core is provided in the middle of the tool in the form of a cloth-sisal quilt acting as a cushion backing for the sheets, and which may retain coolant or compound during operation. The tool has longer working life with improved flexibility and working characteristics.
Claims13
An abrasive rotary finishing star tool comprising inner and outer packs of rectilinear abrasive sheets with a center drive mandrel hole, the inner packs of sheets being offset about the rotary axis of the tool from the outer packs of sheets, and discontinuous radial slits in each sheet, said sheets being square and said slits extending radially from an unslit section of the sheet around the mandrel hole.
An abrasive rotary finishing star tool comprising inner and outer packs of rectilinear abrasive sheets with a center drive mandrel hole, the inner packs of sheets being offset about the rotary axis of the tool from the outer packs of sheets, and discontinuous radial slits in each sheet, including a backing core in the middle of the tool.
An abrasive rotary finishing star tool comprising inner and outer packs of square abrasive sheets with a center drive mandrel hole, the inner packs of sheets being offset about the rotary axis of the tool from the outer packs of sheets, and a backing core in the middle of the tool between the inner packs of sheets.
Dependencies are inferred from the claim text.