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US 3,952,857 AGranted
Magnetic substance conveying apparatus
AssigneeBunri Kogyo Kabushiki Kaisha
InventorIwao Nazuka
Life of this patent
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Abstract
In a magnetic substance conveying apparatus, to convey the magnetic substance along the outer periphery of an outer cylinder made of non-magnetic material by the relative rotational movement between the outer cylinder and an inner cylinder inside the outer cylinder and having magnets wound therearound in a spiral fashion, the angle of the spiral of the magnets wound over the inner cylinder gradually increases as the spiral advances toward the end thereof.
Claims8
In a magnetic substance conveying apparatus for conveying a magnetic substance from a first position to a second position, comprising:
- an inner cylinder having magnets spirally wound thereon;
- an outer cylinder made of non-magnetic material and surrounding said inner cylinder over at least a portion of the length of said inner cylinder;
- and
- means for providing relative rotational movement between said outer cylinder and said inner cylinder for conveying the magnetic substance along the outer periphery of said outer cylinder;
- the improvement wherein the angle of the magnet spiral at the end portion thereof, in the vicinity of said second position, is larger than the angle of the magnet spiral at the beginning portion thereof.
2 more elements
Dependencies are inferred from the claim text.