Invention Grant
- Patent Title: Closed-loop monitoring and identification of CD alignment for papermaking processes
- Patent Title (中): 闭环监测和鉴定造纸工艺的CD校准
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Application No.: US12790951Application Date: 2010-05-31
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Publication No.: US08224476B2Publication Date: 2012-07-17
- Inventor: Danlei Chu , Cristian Gheorghe , Johan Backstrom
- Applicant: Danlei Chu , Cristian Gheorghe , Johan Backstrom
- Applicant Address: CA Mississauga
- Assignee: Honeywell ASCa Inc.
- Current Assignee: Honeywell ASCa Inc.
- Current Assignee Address: CA Mississauga
- Agency: Cascio Schmoyer & Zervas
- Main IPC: G06F7/66
- IPC: G06F7/66 ; D21F11/00 ; D21F13/00 ; D21F7/00

Abstract:
Alignment is a critical component for modeling a cross-directional (CD) papermaking process. It specifies the spatial relationship between individual CD actuators to paper quality measurements. Misalignment can occur unexpectedly due to sheet wander or CD shrinkage variation. In certain applications and circumstances, a misalignment of one third (⅓) actuator zone width can result in significant paper quality degradation. Detecting a misalignment and identifying CD alignment in closed loop are highly demanded in paper mills but these are nontrivial problems. A technique for maintaining proper CD alignment in sheetmaking systems entails monitoring the alignment online, triggering closed loop identification if misalignment is detected, and then deploying the new alignment. No personnel intervention is required.
Public/Granted literature
- US20110290438A1 Closed-loop Monitoring and Identification of CD Alignment for Papermaking Processes Public/Granted day:2011-12-01
Information query
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