Simplified laser apparatus and method for measuring stock thickness on papermaking machines
US5587051A · kind A · utility
Inventors
Key dates
| Filing date | Nov 14, 1994 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Nov 14, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S162/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for monitoring the de-watering performance of a forming section of a papermaking machine is disclosed which includes a laser instrument having a laser displacement meter laterally spaced and supported above an upper run of a paper forming fabric having a paper stock deposited thereon. A head box deposits paper stock consisting of a water/fiber mixture on top of the upper run. An adjustable C-shaped carrier stand has an upper leg that supports the laser instrument above the upper run of the forming fabric. The carrier stand has a lower leg to support a baseline contact device below the upper run of the forming fabric. The laser displacement meter is disposed at a laser reference position above the forming fabric so that a laser beam is reflected off of the paper stock which is deposited on top of the forming fabric. The baseline device is disposed at a baseline reference position below said forming fabric so that a first distance between the laser reference and the baseline reference can be measured. The laser meter generates a signal representing a second distance of the top surface of the paper stock from the laser referencec. A controller receives the sign…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.