US 10,501,274 B2Granted

Continuous web sheet defect analytics, classification and remediation for enhancing equipment efficiency and throughput

AssigneeHoneywell International Inc.

InventorsBalamurugan Ramakrishnan, Gajanan Rothe, Niranjan Rao, Lingathurai Palanisamy, Ajaykumar R Bangur

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Abstract

Monitoring continuous repetitive web sheet defects to determine the causes of such defects by creating unique diagnostic patterns associated with selected components of a web-making machine and employing pattern recognition techniques to analyze and classify web-sheet dynamic and deterministic defect patterns, and identify their root causes. Corrective actions can be effected thereby enhancing machine run-time to minimize late deliveries and improves overall product quality. The technique which is integrated with quality control system can be applied to the manufacturer of paper, packaging, rubber sheets, plastic film, metal foil, and the like.

Claims17

Dependent claims

A process to monitor characteristics of web defects which are continuously generated on a moving web, which is moving in a machine direction (MD), and that is in contact with circulating machine components of a circulating web machine during production and to identify the causes of the web defects, which process comprises:

(a) identifying at least one circulating web machine component that can generate corresponding web defect patterns on a continuously moving web of material;
(b) creating one or more diagnostic patterns for the at least one circulating web machine component identified in step (a);
(c) detecting dynamic and deterministic web defect patterns on the continuously moving web of material during production;
(d) identifying the locations along the MD of the dynamic and deterministic web defect patterns on the continuously moving web of material;
(e) classifying the detected dynamic and deterministic web defect patterns in step (c) to determine whether the detected web defects are repetitive or non-repetitive;
(f) correlating detected dynamic and deterministic web defect patterns to at least one circulating web machine component using the one or more diagnostic patterns created in step (b), wherein step (f) is applied only to dynamic and deterministic web defects that are repetitive;
and
(g) determining a source of the detected dynamic and deterministic web defect patterns.

5 more elements

A monitoring process for a continuous web making machine having a wet end which includes a circulating endless wire on which a continuous aqueous sheet of material is formed and a dry end which includes a plurality of devices that transform the continuous aqueous sheet of material that is moving in a machine direction (MD) into a continuous dried sheet product, wherein the monitoring process comprises:

(a) identifying a rotatable component of the continuous web making machine, wherein the rotatable component is selected from the group consisting of a circulating endless wire mesh, a circulating endless cloth or felt, a press, a rotating roll or cylinder, that can impart corresponding repetitive web defects onto a continuous moving web of material;
(b) developing a diagnostic pattern for the rotatable component identified in step (a);
(c) detecting web defects on a continuous moving web material during production;
(d) analyzing the detected web defects in step (c) to determine whether the detected web defects are repetitive or non-repetitive;
(e) comparing the diagnostic pattern to detected web defects that are repetitive;
and
(f) identifying a source of web repetitive defects.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/642,683Filed 6 Jul 2017
Published: US 2019/0010005 A110 Jan 2019
Granted: 10 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B65H 26/02
Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms: responsive to presence of irregularities in…
B65H 20/02
Advancing webs: by friction roller
D21G 9/0009
Other accessories for paper-making machines: paper-making control systems
B65H
Handling thin or filamentary material

Family

US 2019/0010005 A1Pre-grant publication · published 10 Jan 2019
US 10,501,274 B2This patent

From the US filing history. Foreign family members aren’t listed.

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