CA2369401A1 - Device and method for ventilating an offset pocket space in a papermaking machine - Google Patents

Device and method for ventilating an offset pocket space in a papermaking machine Download PDF

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Publication number
CA2369401A1
CA2369401A1 CA 2369401 CA2369401A CA2369401A1 CA 2369401 A1 CA2369401 A1 CA 2369401A1 CA 2369401 CA2369401 CA 2369401 CA 2369401 A CA2369401 A CA 2369401A CA 2369401 A1 CA2369401 A1 CA 2369401A1
Authority
CA
Canada
Prior art keywords
felt
air
cylinders
pocket space
cleft
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
Application number
CA 2369401
Other languages
French (fr)
Other versions
CA2369401C (en
Inventor
Remi Turcotte
Dominique Thifault
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enerquin Air Inc
Original Assignee
Enerquin Air Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US09/774,139 external-priority patent/US6412192B1/en
Priority claimed from CA 2332677 external-priority patent/CA2332677C/en
Application filed by Enerquin Air Inc filed Critical Enerquin Air Inc
Priority to CA 2369401 priority Critical patent/CA2369401C/en
Publication of CA2369401A1 publication Critical patent/CA2369401A1/en
Application granted granted Critical
Publication of CA2369401C publication Critical patent/CA2369401C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The device (10) and method are used for ventilating an offset pocket space (12) located in a drying section of a papermaking machine by injecting air from a heated dry air supply inlet (11). The offset pocket space (12) is situated between a set of three axially-parallel drying cylinders (20) over which consecutive ly runs a paper web (14). A first and a third of these cylinders (20) are vertically spaced from a second one. The paper web (14) is pressed against the first and the third cylinder (20) by a felt (16) which further runs around a felt roll (26) havi ng a rotation axis parallel to that of the cylinders (20). The felt roll (26) is disposed between the three cylinders (20) in an offset position which is closer to th e first cylinder (20) than the third cylinder (20). The device (10) comprises a first air outlet (50) where a first air stream i s directed into a cleft (34) defined where the felt (16) rejoins the felt roll (26), an d a second air outlet (52) where a second air stream is directed in close proximity to the felt (16) at a location which is upstream of the cleft (34). The second air strea m is in a direction which is substantially opposite the running direction (R) of the felt (16). In use, the device (10) and the corresponding method allow the first air stream to flow through the felt (16) and lift the paper web (14) away from the felt (1 6) so as to reach the offset pocket space (12). The second air stream creates an air curtain to lower the pressure in a zone between the first (50) and the secon d (52) air outlet, thereby establishing a zone of reduced air pressure in close proximity to the felt (16) at a location which is immediately upstream of the cleft (34).
CA 2369401 2001-01-30 2002-01-28 Device and method for ventilating an offset pocket space in a papermaking machine Expired - Lifetime CA2369401C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2369401 CA2369401C (en) 2001-01-30 2002-01-28 Device and method for ventilating an offset pocket space in a papermaking machine

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US09/774,139 US6412192B1 (en) 2001-01-30 2001-01-30 Device and method for ventilating an offset pocket space in a papermaking machine
US09/774,139 2001-01-30
CA2,332,677 2001-01-31
CA 2332677 CA2332677C (en) 2001-01-31 2001-01-31 Device and method for ventilating an offset pocket space in a papermaking machine
CA 2369401 CA2369401C (en) 2001-01-30 2002-01-28 Device and method for ventilating an offset pocket space in a papermaking machine

Publications (2)

Publication Number Publication Date
CA2369401A1 true CA2369401A1 (en) 2002-07-30
CA2369401C CA2369401C (en) 2007-11-20

Family

ID=27171452

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2369401 Expired - Lifetime CA2369401C (en) 2001-01-30 2002-01-28 Device and method for ventilating an offset pocket space in a papermaking machine

Country Status (1)

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CA (1) CA2369401C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9605381B2 (en) 2015-01-30 2017-03-28 Enerquin Air Inc. Pocket ventilator device and method
CN114294743A (en) * 2021-12-13 2022-04-08 航天建筑设计研究院有限公司 Sampling shelter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9605381B2 (en) 2015-01-30 2017-03-28 Enerquin Air Inc. Pocket ventilator device and method
CN114294743A (en) * 2021-12-13 2022-04-08 航天建筑设计研究院有限公司 Sampling shelter

Also Published As

Publication number Publication date
CA2369401C (en) 2007-11-20

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Effective date: 20220128