Phase control method and system for corrugated fiberboard sheet comprising a plurality of core paper layers
US6325881A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1998 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | May 5, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1025
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method capable of certainly correcting a phase shift between a plurality of core paper layers. In the method according to this invention, the next phase shift quantity .delta.'.sub.3 is estimated on the basis of a previous measured phase shift value .delta..sub.1 and the present measured phase shift value .delta..sub.2 and a single-faced corrugated fiberboard sheet tension changing quantity .DELTA.T.sub.1 for correction of the next phase shift quantity .delta.'.sub.3 estimated is calculated to adjust the tension to the single-faced corrugated fiberboard sheet on the basis of the calculated tension changing quantity .DELTA.T.sub.1. This invention is effectively applicable when, for example, manufacturing a two-layer core single-faced corrugated fiberboard sheet or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.