The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1992
Filed:
Mar. 12, 1991
Olavi Viitanen, Jyvaskyla, FI;
Valmet Paper Machinery Inc., , FI;
Abstract
A beam construction used in the area of single-draw of the drying wire (13) in a paper machine or the equivalent thereof is placed in proximity of the straight joint run of the drying wire (13) and the web (W) between the drying cylinder (10) and the leading cylinder (12) or roll on a sector (a) of the leading cylinder (12) or roll that is otherwise free from the drying wire (13). The beam construction comprises a static closing-suction beam (20) with no blowing members. The closing-suction beam (20) covers the drying wire (13) which runs form the drying cylinder (10) onto the subsequent leading cylinder (12) or roll, the web (W) being placed on the opposite face of said wire (13). At the inlet edges of the closing-suction beam (20) transverse seals (27,28) are placed against the drying wire (13) and the leading cylinder (12) as well as lateral seals (25, 25a) at the ends of the closing-suction beam (20). These prevent the access of air into the spaces (14,15) between the closing-suction beam (20) and the drying wire (13) and the leading cylinder (12). Negative pressure is produced in the latter spaces (14,15) and in the inlet nip (N+) between the leading cylinder (12) and the drying wire (13) by the intermediate of perforations (12c) in the mantle (12b) of the leading cylinder (12) out of the negative pressure prevailing inside the mantle (12b) of the leading cylinder (12).