Apparatus and method for corrugating resharpened blades
First Claim
1. A portable device for grinding corrugations into a narrow surface forming one side of the cutting edge of a blade of a pair of scissors for which the cutting edge of the blade has been resharpened, comprising:
- a portable base;
a blade holder carried by said base and configured to support the blade to be corrugated;
a corrugating wheel carried by said base in a manner rotatable about an axis of rotation relative to said base and having an annular circumferential edge defining a corrugating surface therein, wherein any line taken in a direction parallel to the axis of rotation and across substantially the entire corrugating surface measures substantially less than the length of the blade of the scissors, and wherein said corrugating surface defines a plurality of alternating radially projecting, triangular shaped peaks and grooves;
an axial shaft carried by said base and nonrotatably connected to said corrugating wheel and having a central axis of rotation coincident with the axis of rotation of said corrugating wheel;
a motor carried by said base and having an armature configured to rotate at a first revolution per minute (RPM) rating; and
a gearing arrangement carried by said base and connecting said rotatable armature of the motor to the axial shaft, said gearing arrangement being configured to convert the first RPM rating to a second RPM rating.
1 Assignment
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Accused Products
Abstract
An apparatus and method are provided for cutting corrugations into the resharpened blade of a scissor. The apparatus comprises a rotatable corrugating wheel. The peripheral annular circumferentially disposed edge of the wheel defines a corrugating surface that is configured to abrade the sharpened edge surface of the scissor blade. The corrugating surface is formed by a substantially uninterrupted ridge that helically winds around the entire circumferential edge of the corrugating wheel wherein adjacent windings of the ridge are separated by a substantially uninterrupted recess that helically winds around the entire circumferential edge of the corrugating wheel. The corrugating surface can be formed in the circumferentially disposed peripheral annular surface of a circular steel disc that has been coated with a fine diamond coating or a fine ceramic coating or a combination of the two. Alternatively, the corrugating surface can be formed in the circumferentially disposed peripheral annular surface of a circular disc formed of aluminum oxide.
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Citations
17 Claims
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1. A portable device for grinding corrugations into a narrow surface forming one side of the cutting edge of a blade of a pair of scissors for which the cutting edge of the blade has been resharpened, comprising:
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a portable base; a blade holder carried by said base and configured to support the blade to be corrugated; a corrugating wheel carried by said base in a manner rotatable about an axis of rotation relative to said base and having an annular circumferential edge defining a corrugating surface therein, wherein any line taken in a direction parallel to the axis of rotation and across substantially the entire corrugating surface measures substantially less than the length of the blade of the scissors, and wherein said corrugating surface defines a plurality of alternating radially projecting, triangular shaped peaks and grooves; an axial shaft carried by said base and nonrotatably connected to said corrugating wheel and having a central axis of rotation coincident with the axis of rotation of said corrugating wheel; a motor carried by said base and having an armature configured to rotate at a first revolution per minute (RPM) rating; and a gearing arrangement carried by said base and connecting said rotatable armature of the motor to the axial shaft, said gearing arrangement being configured to convert the first RPM rating to a second RPM rating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for grinding corrugations into a narrow surface forming one side of the cutting edge of a blade of a pair of scissors for which the cutting edge of the blade has been resharpened, comprising:
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using a motor to rotate a portable corrugating wheel at essentially a constant number of revolutions per minute, wherein the annular circumferential edge of the wheel defines a corrugating surface therein, wherein the width of the corrugating surface measures substantially less than the length of the blade of the scissors and said corrugating surface defines a plurality of alternating radially projecting, triangular shaped peaks and grooves that has a predetermined pitch; using a mechanical blade holder to hold the blade to be corrugated at a fixed angle with respect to the rotating corrugating surface of the corrugating wheel; placing the edge of the resharpened blade near the portion of the blade closest to the pivot point of the scissor, into sufficient grinding contact with the corrugating surface so that upon rotation of the corrugating wheel with the corrugating surface in contact with the narrow surface forming one side of the edge of the blade to be corrugated, the rotation of the corrugating wheel will cause the free end of the blade to be pulled in the direction toward the corrugating surface of the corrugating wheel as the corrugating surface of the corrugating wheel will grind new corrugations into the entire narrow surface forming one side of the edge of the resharpened scissor blade.
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Specification