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:
Apr. 16, 1991
Filed:
Feb. 28, 1990
Valmet Paper Machinery, Inc., Helsinki, FI;
Abstract
A creping doctor (2) for creping a soft paper web (3) off a yankee cylinder (1) is described which comprises a supporting beam (4) disposed close to the envelope surface of the yankee cylinder (1) and provided with an internal space, the internal space of the supporting beam (4) is divided into a first longitudinal suction chamber (24) and a second longitudinal suction chamber (25). The creping doctor also produces a subatmospheric pressure in the suction chambers (24, 25); a first suction connection (18, 19, 21) connecting the first suction chamber (24) of the supporting beam (4) to an external dust-generating space (7) located between the doctor blade (6) and the soft paper web (3) creped off; and a second suction connection (40, 42, 43) connecting the second suction chamber (25) of the supporting beam (4) with an internal dust-generating space (8) located between the doctor blade (6) and the envelope surface of the yankee cylinder (1).