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US 6,267,660 B1Granted
Rotatable grinding or polishing tool, an apparatus with such a tool and a method for grinding or polishing
OwnerPoul Erik Jesperseninventor
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OwnerPoul Erik Jesperseninventor
Estimating the term…
The invention concerns a rotatable grinding/polishing tool, an apparatus with such a tool and a method for using such a tool. The tool has grinding elements in the shape of grinding/polishing flaps extending radially outward from a roller. Reinforcing support brushes also extend radially outward and adjacent to the flaps. Furthermore, the tool has holding elements, preferably in the shape of brushes, likewise extending radially outwards from the roller. The holding brushes have substantially lesser length than the flaps and the reinforcing support brushes. At the same time, the tangential stiffness of the holding brushes is considerably greater than the tangential stiffness of the flaps and the support brushes. The length of the grinding flaps is preferably so that by grinding or polishing, the flaps are capable of extending beyond an adjacent holding element.
A rotatable grinding or polishing tool with grinding elements each mounted in a cylinder surface, said grinding elements comprise flaps of abrasive cloth which have an extension and support brushes having substantially, a radial extension which is the same as the flap extensions and provided in close contact with said flaps, characterized in that between each grinding element there is provided a holding element which has substantially shorter radial extension than said grinding elements and which comprises holding means with a substantially greater stiffness in tangential direction than the support brushes.
An apparatus comprising support means for advancing an item with a certain thickness to be ground or polished and a rotatable grinding or polishing tool mounted above the support means and having grinding elements that are mounted in a cylinder surface, the grinding elements comprising flaps of abrasive cloth which have an extension and support brushes which have substantially a radial extension which is the same as the flap extensions and which are provided in close contact with these flaps, characterized in that between each said grinding element there is provided a holding element having substantially shorter radial extension than the grinding elements and comprising holding means with a substantially greater stiffness in tangential direction than the support brushes.
A method for grinding substantially plane items by using a grinding or polishing tool according to any preceding claim which is pressed against the item, characterized in that the tool is pressed against the item with such a force that the grinding flaps and the support brushes are bent in over an upper side of the holding element.
Dependencies are inferred from the claim text.