Reference chart apparatus
US7631439B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Apr 28, 2008 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Jun 10, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2003/1051
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A reference chart apparatus for determining cutting angles of molding strips provides a tape housing containing a pair of tape coils. The top and bottom surfaces of the tape coils are imprinted with cutting guide charts providing miter angle and blade tilt cutting data for corner angles between zero and at least 180°. In addition, the housing defines three angled cutouts measuring 52°, 45°, and 38° respectively, for determining the slope angle of a given piece of molding. Each one of the cutouts is preferably colored with a unique reference color corresponding to an appropriate cutting guide chart sharing the same reference color. A housing clamp is also provided for removably engaging the housing, allowing the housing to be stored and used in a readily accessible area, such as on a miter saw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.