Safety device for chip conditioning device

Details Safety device for chip conditioning device Safety device for chip conditioning device

1992-04-01

1993-11-23

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

Wood and similar natural-fibrous vegetable material

241 34, 241 81, 241 82, 162 55, 209567, 209571, 209655, 209657, B02C 2500, B07C 5344

Patent

active

052636518

ABSTRACT:
An apparatus for processing wood chips for use in the preparation of pulp in a papermaking operation including a conduit for accommodating a flow stream of wood chips, a rotary valve in the conduit, shunt branch conduits with a first shunt leading to a chip dumping bin and a second shunt leading to a chip processing device; dampers in the branches with the damper for the first shunt branch being in normally closed position and a damper in the other shunt branch being in a normally open position; and a metal detection device upstream of the branches operative to move the first damper to open position and the second damper to closed position for a predetermined time and to stop the rotary valve and to reactivate the dampers and rotary valve after a predetermined time.

REFERENCES:
patent: 1348310 (1920-08-01), North
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patent: 4171262 (1979-10-01), Lattmann et al.
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patent: 4815667 (1989-03-01), Keller
patent: 4953795 (1990-09-01), Bielagus
patent: 5090574 (1992-02-01), Hamby
patent: 5133507 (1992-07-01), Sepling et al.

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