US4047609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic roller conveyor
Assignee: BUNRI KOGYO KK
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Filing: 1976-05-12
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Granted: 1977-09-13
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Expires: 1996-05-12
Abstract
Abstract A magnetic roller conveyor wherein a plurality of magnetic rollers are arranged in a row, each of which includes an outer drum and an inner drum disposed in the outer drum and having magnets mounted thereon. The outer drum is rotated while the inner drum is fixed, whereby objects are conveyed by making use of magnetic forces of the magnets. Each roller includes a dampingly magnetized segment mounted past the vertex of the roller, the force of the segment decreasing in the direction of travel to facilitate transfer to the adjacent roller.
Inventors
- 👤 Iwao Nazuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:59
CPC Classifications
B; B65; B65G; B65G39/00; B65G39/02; B65G39/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
181 words
A magnetic roller conveyor for transporting objects, comprising a plurality of magnetic rollers arranged in a row in the transport direction of the roller conveyor, each of said magnetic rollers including: a rotatable conveying roller, a fixed inner barrel disposed within said rotatable conveying roller, and magnet means on the outer periphery of said fixed inner barrel and extending over substantially half of the circumference of said fixed inner inner barrel and extending over the vertex of said fixed inner barrel, a last part of said magnet means which is past the vertex of said fixed inner barrel in the direction of rotation of said conveying roller comprising a dampingly magnetized portion whose magnetic force decreases, relative to the magnetic force of the remaining portion of said magnet means, gradually in said direction of rotation of said conveying roller, said last part of said magnet means being adjacent a strong magnetic force portion of the magnet means of the next successive one of said plurality of magnetic rollers which has a stronger magnetic force than that of said dampingly magnetized portion.
Claim 2
Dependent Claim
181 words
A magnetic roller conveyor for transporting objects, comprising a plurality of magnetic rollers arranged in a row in the transport direction of the roller conveyor, each of said magnetic rollers including: a rotatable conveying roller, a fixed inner barrel disposed within said rotatable conveying roller, and magnet means on the outer periphery of said fixed inner barrel and extending over substantially half of the circumference of said fixed inner inner barrel and extending over the vertex of said fixed inner barrel, a last part of said magnet means which is past the vertex of said fixed inner barrel in the direction of rotation of said conveying roller comprising a dampingly magnetized portion whose magnetic force decreases, relative to the magnetic force of the remaining portion of said magnet means, gradually in said direction of rotation of said conveying roller, said last part of said magnet means being adjacent a strong magnetic force portion of the magnet means of the next successive one of said plurality of magnetic rollers which has a stronger magnetic force than that of said dampingly magnetized portion.
Claim 3
Dependent Claim
38 words
The magnetic roller conveyor as defined in claim 1, comprising at least one protuberant piece on an outer peripheral surface portion of each of conveying rollers and extending in an axial direction of each of said conveying rollers.
Claim 4
Dependent Claim
28 words
The magnetic roller conveyor as defined in claim 1, wherein said magnet means comprises a plurality of adjacent magnet pieces on the outer periphery of said inner barrel.
Claim 5
Dependent Claim
26 words
The magnetic roller conveyor as defined in claim 3, wherein said adjacent magnetic pieces of each respective magnetic means are immediately adjacent and contacting each other.
Claim 6
Dependent Claim
62 words
The magnetic roller conveyor as defined in claim 3, wherein one of said magnet pieces on said outer periphery of said inner barrel which is situated at a last part of said magnet means in the direction of rotation of said conveying roller is a dampingly magnetized magnet whose magnetic force decreases gradually in said direction of rotation of said conveying roller.
Claim 7
Dependent Claim
29 words
The magnetic roller conveyor as defined in claim 5, wherein said last part of said magnetic means is adjacent the next successive one of said plurality of magnetic rollers.
Claim 8
Dependent Claim
28 words
The magnetic roller conveyor as defined in claim 3, comprising, on each of said inner barrels, a plurality of said magnet means spaced along the axial length thereof.
Claim 9
Dependent Claim
27 words
The magnetic roller conveyor as defined in claim 7, wherein alternate ones of said magnet means of each of said inner barrels are N and S polarities.
Claim 10
Dependent Claim
28 words
The magnetic roller conveyor as defined in claim 1, comprising, on each of said inner barrels, a plurality of said magnet means spaced along the axial length thereof.
Claim 11
Dependent Claim
27 words
The magnetic roller conveyor as defined in claim 9, wherein alternate ones of said magnet means of each of said inner barrels are N and S polarities.
Claim 12
Dependent Claim
16 words
The magnetic roller conveyor as defined in claim 1, comprising means for rotating said conveying rollers.
Claim 13
Dependent Claim
23 words
The magnetic roller conveyor as defined in claim 11, wherein said rotating means includes means for rotating said rollers in interlocking rotational relationship.
Claim 14
Dependent Claim
36 words
The magnetic roller conveyor as defined in claim 1 wherein said last part of said magnet means being adjacent the portion of said magnetic means of said next successive magnetic roller having the strongest magnetic force.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |