Invention Grant
- Patent Title: Yankee drying hood arrangement, a Yankee drying cylinder fitted with a Yankee drying hood arrangement and a method of drying a fibrous web
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Application No.: US17423005Application Date: 2020-01-15
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Publication No.: US11268240B2Publication Date: 2022-03-08
- Inventor: Olli Saikkonen , Luca Moscatelli , Klavdij Lasic , Raffaele Malutta , Michele Durisotti , Lorenzo Simeoni
- Applicant: VALMET AB
- Applicant Address: SE Sundsvall
- Assignee: VALMET AB
- Current Assignee: VALMET AB
- Current Assignee Address: SE Sundsvall
- Agency: Alston & Bird LLP
- Priority: SE1950043-8 20190115
- International Application: PCT/EP2020/050854 WO 20200115
- International Announcement: WO2020/148304 WO 20200723
- Main IPC: D21F5/18
- IPC: D21F5/18 ; D21F5/02 ; D21F5/04

Abstract:
The invention relates to a Yankee drying hood arrangement (1) which has a first temperature main supply conduit (9, 9′) for a fluid such as hot air, or hot air and steam and/or water vapour, at a first temperature T1 and a second temperature main supply conduits (10, 10′) for a fluid such as hot air, or hot air and steam and/or water vapour, at a second temperature T2 which is not the same as T1, the first temperature and second temperature main supply conduits (9, 9′, 10, 10′) being in communication with the distributor conduits (8) such that a fluid such as hot air can stream from the first temperature and second temperature main supply conduits (9, 9′, 10, 10′) to the distributor conduits (8), wherein at least one distributor conduit (8) is provided with damper means (31) for changing the ratio between amount of fluid at temperature T1 from the first temperature main conduit and the amount of fluid at temperature T2 from the second temperature main conduit that streams into the distributor conduit.
Information query