Woodworking – Cutter hood or dust conveyor – With sifter – sorter – or separator
Patent
1989-10-27
1990-09-18
Bray, W. Donald
Woodworking
Cutter hood or dust conveyor
With sifter, sorter, or separator
51273, 408 67, 409134, 409137, B27G 1900
Patent
active
049571486
ABSTRACT:
A chip removing device for a multi-head machine tool which is reduced in cost, facilitates maintenance thereof and allows adjustment of the distance between adjacent working heads by a comparatively great amount. The device comprises a duct having a slit formed in a lower wall thereof, and an expansible shutter for normally closing the slit. A connecting pipe extends upwardly from each of the working heads, and upper end portions of the connecting pipes extend in an airtight condition through the shutter into the duct. When a working head is moved, the shutter is partially expanded and contracted following the working head to maintain the closed condition of the slit. A seal plate is secured horizontally within the duct and disposed commonly to the working heads. The connecting pipe of a working head at an upper position is pressed at an upper end opening thereof against the seal plate to close the upper end opening in an airtight condition, but the upper end opening of the connecting pipe of another working head at a lower position is spaced away from the seal plate and is in an open condition.
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