Sheet material coil counter
US5428557A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | May 17, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06M9/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method apparatus for determining the length of a roll of sheet material, including a side surface at which the edge of each of the plurality of layers of sheet material is exposed wherein the side surface of the roll of sheet material is exposed to a source of radiation and the radiation reflected from the edges of the roll is scanned in a radial direction to establish a first signal indicative of the reflected radiation and the number of edges of layers of sheet material. The length of the roll of sheet material is calculated using the sensed number of layers of sheet material in the roll. The method and apparatus are similarly adapted to determine the number of layers of sheet material in a stack of sheet material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.