Electric sharpener for ceramic and metal blades
First Claim
1. In a sharpener for sharpening ceramic blades wherein the sharpener has at least one stage, each stage having at least one rotatable disc with an abrasive surface and having guide structure for guiding a knife blade with its facet against the rotating disc, the improvement being in that the stage is a finishing stage which simultaneously sharpens and polishes the blade facet, said disc in said finishing stage being in the form of a rigid support having a soft resilient polymer matrix containing ultra-hard abrasive particles to sharpen/polish the blade facet, and the abrasive particles in said matrix having a grit size of 180-2000 grit.
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Accused Products
Abstract
An electric sharpener for sharpening ceramic blades includes at least one stage. The stage is a finishing station having a sharpening member in the form of a disc which comprises a rigid support having a flexible abrasive matrix which both sharpens and polishes the facet of the ceramic blade. The sharpener may include a pre-sharpening stage for metal blades and a further pre-sharpening stage for ceramic blades. The sharpener also includes a removable guide.
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Citations
24 Claims
- 1. In a sharpener for sharpening ceramic blades wherein the sharpener has at least one stage, each stage having at least one rotatable disc with an abrasive surface and having guide structure for guiding a knife blade with its facet against the rotating disc, the improvement being in that the stage is a finishing stage which simultaneously sharpens and polishes the blade facet, said disc in said finishing stage being in the form of a rigid support having a soft resilient polymer matrix containing ultra-hard abrasive particles to sharpen/polish the blade facet, and the abrasive particles in said matrix having a grit size of 180-2000 grit.
- 12. In a sharpener for sharpening the blade of a cutting instrument wherein the sharpener includes a sharpening member and guide structure, said guide structure including a guide member having a guide surface against which the blade may be placed to guide the blade against the sharpening member, the improvement being in that said guide member has a guiding position during use of the sharpener, and said guide member being selectively movable to an exposed position away from said guiding position to provide access to said guide member, and said guide member being mounted on a post which is selectively moveable to and from said guiding position and said exposed position.
Specification