Hand tool edge tester
US11092527B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2018 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | May 7, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24D15/081
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A hand tool edge tester for evaluating the sharpness and smoothness of the cutting edge of a blade for the hand tool like a knife is provided according to the invention. The knife blade is held stationary along a horizontal, longitudinal axis. A long piece of solid tape of the cuttable substrate material like Teflon moved within a reel-to-reel tape mechanism attached to a tape carriage travels simultaneously horizontally as the tape carriage moves along a longitudinal axis, and along an upwardly inclined, diagonal pathway defined by the reel-to-reel mechanism. The blade of the hand tool slices the upwardly, diagonally moving tape ribbon with the load cell measuring the cutting force exerted by the tape ribbon against the blade as it is moved along the distance of the cutting edge substantially between the hand tool handle and the blade tip. The diagonal axis for the path of the traveling cuttable substrate media tape allows the knife blade to cut the tape more easily without tearing, along with an approximate 90° angle between the blade tip and the cutting media pathway, thereby providing a more accurate measurement by the load cell of the tip portion of the blade as it slices the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.