Apparatus for selectively moving the slice lip of a headbox

Details Apparatus for selectively moving the slice lip of a headbox Apparatus for selectively moving the slice lip of a headbox

1987-04-27

1988-02-23

Chin, Peter

Paper making and fiber liberation

Apparatus

Automatic control

162262, 162344, 162347, D21F 106

Patent

active

047268832

ABSTRACT:
An apparatus is disclosed for selectively moving the slice lip of a headbox of a papermaking machine. The apparatus includes a housing secured to the headbox with the housing defining an elongate chamber. A control rod has a first and a second end with the first end being connected to the slice lip and the second end defining a longitudinally-threaded surface. A rotatable member is disposed within the chamber, the rotatable member defining an internally-threaded bore which cooperates with the threaded surface of the control rod such that when the member rotates within the chamber, the control rod is moved axially relative to the housing for selectively moving the slice lip. A motor is rigidly secured to the housing and is drivingly connected to the rotatable member for selectively rotating the rotatable member relative to the housing. The motor and the rotatable member are coaxial such that the apparatus is of compact configuration so that the space required by the apparatus is reduced and a larger number of control rods may be disposed in side-by-side relationship in a cross-machine direction such that the controllability of the slice lip is increased.

REFERENCES:
patent: 3413192 (1968-11-01), Beecher
patent: 4514348 (1985-04-01), Iguchi et al.
patent: 4517056 (1985-05-01), Roerig et al.
patent: 4526654 (1985-07-01), Johansson et al.
Garnett, "Gaining an Edge: CD Profile Control at the Headbox", PIMA, Feb. 1984, pp. 19-23.

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