Sharpening system for scissors with complex curved blades
View Patent ↗A device and method of sharpening hair cutting scissor blades passes a blade over the perimeter portion of a flexible sharpening pad to flex the perimeter portion out of the plane of the pad. The blade is held in an angled orientation over the pad and is moved horizontally and downward during the sharpening motion. Independent horizontal and vertical movements allow addressing irregularly shaped blades including blades with a radial shape and convex blades.
1. A hair scissor blade sharpening method comprising:
securing a scissor blade in a first condition above and across a perimeter portion of a rotating horizontal surface of a sharpening pad, with the blade tip higher than the blade handle;
moving a cutting surface of the blade rigidly downward against the perimeter portion with sufficient force to flex the perimeter portion downward and parallel the cutting surface while simultaneously continuously moving the cutting surface transversely outward and over the perimeter portion;
halting the blade when the blade tip contacts the perimeter portion in a second condition wherein a portion of the blade is below and outside the perimeter portion, and then immediately moving the blade vertically upward.
2. A hair scissor blade sharpening method, according to claim 1 , and further comprising:
returning the blade to the first condition, and subsequently;
moving the blade cutting surface downward against the perimeter portion with sufficient force to flex the perimeter portion downward and parallel the cutting surface while simultaneously rotating the blade about a horizontal axis such as to form a convex shape onto the cutting surface;
moving the blade in step-wise fashion while repeatingly forming a convex shape over the length of the cutting surface.