| 摘要 |
<p>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; a doctor blade (6); a doctor holder (5) mounted to the supporting beam (4); means for producing a subatmospheric pressure in the internal space of the supporting beam (4); and a first suction connection (18, 19, 21) connecting the internal space 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. According to the invention the internal space of the supporting beam (4) is divided into a first longitudinal suction chamber (24) and a second longitudinal suction chamber (25). Furthermore, there is 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), while the first suction connection (18, 19, 21) connects the external dust-generating space (7) with the first suction chamber (24).</p> |
