Invention Grant
- Patent Title: Papermaking machine for forming tissue employing an air press
- Patent Title (中): 用于使用空气压机成形组织的造纸机
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Application No.: US11758558Application Date: 2007-06-05
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Publication No.: US07648612B2Publication Date: 2010-01-19
- Inventor: Roger A. Kanitz , Thomas D. Rogers
- Applicant: Roger A. Kanitz , Thomas D. Rogers
- Applicant Address: FI Helsinki JP Tokyo
- Assignee: Metso Paper, Inc.,Mitsubishi Heavy Industries, Ltd.
- Current Assignee: Metso Paper, Inc.,Mitsubishi Heavy Industries, Ltd.
- Current Assignee Address: FI Helsinki JP Tokyo
- Agency: Alston & Bird LLP
- Main IPC: D21H11/00
- IPC: D21H11/00

Abstract:
A web of tissue is formed in a twin wire former, followed by an air press for water removal in the pressing section, passing onto a Yankee dryer. A headbox injects stock between upper and lower dryer fabrics brought together on a breast roll. The fabrics moves over vacuum boxes, and the web is heated with steam and passed between an upper pressure box and a lower vacuum box forming an air press which dewaters the web. A sheet transfer pickup vacuum box holds the sheet to the upper fabric as the lower fabric diverges from the upper fabric. A pressure roller transfers the web onto a Yankee dryer. The fabrics are cleaned on vertical runs before returning to the breast roll. A final forming fabric is arranged to operated at a lower speed than the penultimate forming fabric so that a rush transfer and creping like action takes place.
Public/Granted literature
- US20070267157A1 Papermaking Machine for Forming Tissue Employing an Air Press Public/Granted day:2007-11-22
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