CA2150021A1 - A Sheet Break Detector Apparatus - Google Patents
A Sheet Break Detector ApparatusInfo
- Publication number
- CA2150021A1 CA2150021A1 CA2150021A CA2150021A CA2150021A1 CA 2150021 A1 CA2150021 A1 CA 2150021A1 CA 2150021 A CA2150021 A CA 2150021A CA 2150021 A CA2150021 A CA 2150021A CA 2150021 A1 CA2150021 A1 CA 2150021A1
- Authority
- CA
- Canada
- Prior art keywords
- transducer
- sheet
- vacuum
- vacuum level
- sheet break
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003190 augmentative effect Effects 0.000 abstract 1
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/04—Paper-break control devices
Landscapes
- Paper (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
A sheet break detector apparatus (10) is disclosed for detecting a sheet break in a dryer section (12) of a paper machine.
The apparatus (10) includes a vacuum transducer (14) which is sensitive to the vacuum level within a vacuum roll (16) of a dryer section (12). The transducer (14) detects only a sudden change in vacuum level within the vacuum roll (16) resulting from a sheet break rather than a relatively gradual change in vacuum level resulting from an operator augmented vacuum level change. A guide device is connected to the transducer (14) and responsive to the transducer (14) for redirecting the sheet to a broke chute (22) upstream relative to the transducer (14) when the transducer (14) detects the sudden change in vacuum level.
The arrangement is such that excessive wind-up of the broken sheet (W) around a dryer (24) of the dryer section (12) is inhibited.
The apparatus (10) includes a vacuum transducer (14) which is sensitive to the vacuum level within a vacuum roll (16) of a dryer section (12). The transducer (14) detects only a sudden change in vacuum level within the vacuum roll (16) resulting from a sheet break rather than a relatively gradual change in vacuum level resulting from an operator augmented vacuum level change. A guide device is connected to the transducer (14) and responsive to the transducer (14) for redirecting the sheet to a broke chute (22) upstream relative to the transducer (14) when the transducer (14) detects the sudden change in vacuum level.
The arrangement is such that excessive wind-up of the broken sheet (W) around a dryer (24) of the dryer section (12) is inhibited.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US98157992A | 1992-11-25 | 1992-11-25 | |
US07/981,579 | 1992-11-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2150021A1 true CA2150021A1 (en) | 1994-06-09 |
CA2150021C CA2150021C (en) | 1998-09-01 |
Family
ID=25528481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002150021A Expired - Fee Related CA2150021C (en) | 1992-11-25 | 1993-10-19 | A sheet break detector apparatus |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0660898B1 (en) |
JP (1) | JP2562799B2 (en) |
KR (1) | KR950704569A (en) |
CN (1) | CN1035076C (en) |
BR (1) | BR9307486A (en) |
CA (1) | CA2150021C (en) |
DE (2) | DE69304545T2 (en) |
FI (1) | FI952548A0 (en) |
MX (1) | MX9307387A (en) |
MY (1) | MY110025A (en) |
PL (1) | PL172455B1 (en) |
TW (1) | TW229270B (en) |
WO (1) | WO1994012724A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI109235B (en) * | 1998-04-27 | 2002-06-14 | Fotocomp Oy | A method for determining a paper web release angle and / or profile |
DE10042243A1 (en) * | 2000-08-28 | 2002-03-14 | Voith Paper Patent Gmbh | Web break monitoring method |
DE102004046795A1 (en) | 2004-09-27 | 2006-04-06 | Voith Paper Patent Gmbh | Device and method for monitoring the transfer of a material web and especially the broadening of the width of a transfer strip on a demolition of the transfer strip or the material web |
DE102007000679A1 (en) | 2007-11-09 | 2009-05-14 | Voith Patent Gmbh | Method and device for detecting a crack and / or a modulus of elasticity of a material web |
EP3290582B1 (en) | 2016-08-29 | 2019-03-13 | Siemens Aktiengesellschaft | Method for operating a machine for manufacturing and/or treating a material web |
CN107164987B (en) * | 2017-07-14 | 2019-02-19 | 河南卷烟工业烟草薄片有限公司 | A kind of large cylinder broken and collecting paper scrap device |
JP6902270B2 (en) * | 2017-10-02 | 2021-07-14 | デュプロ精工株式会社 | Band-shaped object forming device |
CN110877839B (en) * | 2018-09-06 | 2022-03-25 | 西门子(中国)有限公司 | Method and equipment for processing broken paper |
EP3699356A1 (en) * | 2019-02-25 | 2020-08-26 | Siemens Aktiengesellschaft | Method and device for detecting a tear in a fibrous web, industrial equipment and computer program product |
CN110906972B (en) * | 2019-10-28 | 2021-06-18 | 浙江大学山东工业技术研究院 | Automatic paper monitoring and breaking prevention system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1725108A (en) * | 1926-03-10 | 1929-08-20 | Alvin W Smith | Method and apparatus for making paper |
US1838603A (en) * | 1929-07-11 | 1931-12-29 | Sr George S Witham | Paper making machine |
US3097993A (en) * | 1961-05-23 | 1963-07-16 | Dominion Eng Works Ltd | Apparatus for automatic knock-off shower for paper machine |
-
1993
- 1993-10-19 EP EP93924356A patent/EP0660898B1/en not_active Expired - Lifetime
- 1993-10-19 DE DE69304545T patent/DE69304545T2/en not_active Expired - Fee Related
- 1993-10-19 JP JP6513120A patent/JP2562799B2/en not_active Expired - Lifetime
- 1993-10-19 DE DE0660898T patent/DE660898T1/en active Pending
- 1993-10-19 KR KR1019950702070A patent/KR950704569A/en active IP Right Grant
- 1993-10-19 CA CA002150021A patent/CA2150021C/en not_active Expired - Fee Related
- 1993-10-19 BR BR9307486A patent/BR9307486A/en not_active Application Discontinuation
- 1993-10-19 PL PL93308218A patent/PL172455B1/en not_active IP Right Cessation
- 1993-10-19 WO PCT/US1993/009974 patent/WO1994012724A1/en active IP Right Grant
- 1993-11-16 CN CN93114519A patent/CN1035076C/en not_active Expired - Fee Related
- 1993-11-18 MY MYPI93002420A patent/MY110025A/en unknown
- 1993-11-23 TW TW082109841A patent/TW229270B/zh active
- 1993-11-24 MX MX9307387A patent/MX9307387A/en not_active IP Right Cessation
-
1995
- 1995-05-24 FI FI952548A patent/FI952548A0/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
MX9307387A (en) | 1994-06-30 |
EP0660898B1 (en) | 1996-09-04 |
WO1994012724A1 (en) | 1994-06-09 |
DE69304545D1 (en) | 1996-10-10 |
DE660898T1 (en) | 1996-01-18 |
JP2562799B2 (en) | 1996-12-11 |
KR950704569A (en) | 1995-11-20 |
CN1088647A (en) | 1994-06-29 |
BR9307486A (en) | 1999-08-24 |
PL308218A1 (en) | 1995-07-24 |
FI952548A (en) | 1995-05-24 |
PL172455B1 (en) | 1997-09-30 |
FI952548A0 (en) | 1995-05-24 |
DE69304545T2 (en) | 1997-02-06 |
CA2150021C (en) | 1998-09-01 |
TW229270B (en) | 1994-09-01 |
CN1035076C (en) | 1997-06-04 |
EP0660898A1 (en) | 1995-07-05 |
JPH07507604A (en) | 1995-08-24 |
MY110025A (en) | 1997-11-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |