Methods and apparatus for knife and blade sharpening
OwnerDaniel D. Frielinventor
Life of this patent
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Abstract
A knife or blade is sharpened by using an apparatus which includes a magnetic guide having a magnetic knife guide surface in a plane at an angle to and intersecting the abrasive surface to form a line of intersection therewith. The magnetic guide surface has north and south magnetic poles along lines substantially parallel to the line of intersection. One pole is along a portion of the guide surface remote from the abrasive surface and the other pole is along a portion of the guide surface contiguous to the abrasive surface.
Claims9
A method of sharpening a knife having a face terminating at a cutting edge facet comprising providing a magnetic guide member having a magnetic guide surface juxtaposed an abrasive surface with the guide surface being in a plane disposed at a predetermined angle to and intersecting the abrasive surface to form a line of intersection therewith and with the magnetic guide surface having a pair of magnetic poles comprising a north pole and a south pole oriented such that each lies along a line which is substantially parallel to the line of intersection, locating the magnetic guide surface with one of the north and the south magnetic poles being disposed contiguous to the abrasive surface and having the other of the north and the south magnetic poles being disposed remote from the abrasive surface, imparting a motion to the abrasive surface, placing the knife against the magnetic guide member, and utilizing the magnetic field created by the magnetic poles to provide a thrust which moves the cutting edge facet into contact with the abrasive surface and a force to hold the cutting edge facet in contact with the abrasive surface while the abrasive surface is in motion.
A method of sharpening a knife of finite mass having a face terminating at a cutting edge facet using a rotating disk affixed to a mounted shaft and displaceable against a biasing force, a first guide defining a guide plane, and a magnetic force means for applying a force to the knife along the guide plane toward the abrasive disk, said disk having an abrasive surface defining a principal plane perpendicular to the axis of rotating comprising the steps of fixing the position of the first guide rigidly relative to the mounted shaft and contiguous to the principal plane with the guide plane at a predetermined angle relative to the principal plane, positioning the face of the knife along the first guide, moving the knife slidingly along the first guide, urging the knife cutting edge facet into contact with the abrasive disk by subjecting the knife cutting edge facet to the magnetic force means and holding only the cutting edge facet in contact with the abrasive surface by the magnetic force means while the abrasive surface is in motion.
Dependencies are inferred from the claim text.