Creping doctor with two suction chambers in the support beam

Details Creping doctor with two suction chambers in the support beam Creping doctor with two suction chambers in the support beam

1990-02-28

1991-04-16

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

Web creping or crinkling type

162272, 162363, 1525651, 34120, D21G 304

Patent

active

050079867

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).

REFERENCES:
patent: 3003176 (1961-10-01), Goyette
patent: 4019953 (1977-04-01), Nystrom
patent: 4906333 (1990-03-01), Myren

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