Device for measuring the condition of a felt and for recondition

Details Device for measuring the condition of a felt and for recondition Device for measuring the condition of a felt and for recondition

1991-06-18

1992-08-04

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

Measuring, testing, inspecting, indicating or illuminating

73 38, 162198, 162278, 162279, D21F 132, G01N 1508

Patent

active

051356155

ABSTRACT:
Device for measuring the condition of a felt (4) in a paper machine and for reconditioning it, comprising a measuring head (7) provided with a suction chamber (7b) and a measuring surface (7a) to be positioned against the surface of the felt (4) and provided with suction holes (15) leading into the suction chamber (7b); a suction conduit (17) leading out of the suction chamber (7b) and communicating with a vacuum source (9) for sucking air and water through the suction holes (15) from the felt (4) into the suction chamber (7b) and for discharging water and air from the suction chamber (7b); and measuring means (18) for measuring the vacuum pressure in the suction chamber (7b). In the reconditioning and measuring device according to the invention, the measuring head (7) comprises two suction conduits (16, 17) for sucking water and air, respectively. The first suction conduit (16) is positioned in the lower portion of the suction chamber (7b) for discharging mainly water from the suction chamber (7b) and the second suction conduit (17) is positioned in the upper portion of the suction chamber (7b) for discharging mainly air from the suction chamber (7b).

REFERENCES:
patent: 2308574 (1943-01-01), Vickery
patent: 3056281 (1962-10-01), Smyth
patent: 3762211 (1973-10-01), Poulsen
patent: 4880499 (1989-11-01), Pikulik

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