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US 4,899,890 AGranted
Separating apparatus with wobbling take-up roller
OwnerRichard C. Ewing, Walter V. Kuczewski +2inventors
InventorsRichard C. Ewing, Walter V. Kuczewski, Gerald A. Thurber, Helmut Kunig
Life of this patent
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Abstract
A separating apparatus employs a foraminous drum with a resilient belt forming a nip therebetween. A take-up roller upstream of the nip is rotatably supported about a center of rotation that is parallel to, but offset from a central axis of the take-up roller. As the wobbling roller rotates, it constantly changes the point on the circumference of the foraminous drum at which contact is made with the resilient belt. This overcomes a tendency for entering items to bridge the nip.
Claims3
A separating machine comprising:
- a separating drum;
- a plurality of foramina penetrating said separating drum;
- a resilient belt reeved over said separating drum;
- a pressure roller applying pressure through said resilient belt to a surface of said separating drum, whereby material to be separated disposed between said resilient belt and said pressure roller is urged through said plurality of foramina into an interior of said separating drum and a remainder of material remains on a surface of said separating drum;
- at least one take-up roller;
- said at least one take-up roller being disposed upstream of said separating drum and being effective for shaping said resilient belt to form a nip with said surface of said separating drum;
- means for wobbling said at least one take-up roller with respect to an axis thereof, whereby said resilient belt is caused to wobble approaching said nip and a tendency for bridging said nip is overcome;
- said means for wobbling including a wobbling roller;
- and
- said wobbling roller including an axis rotation parallel to, and displaced from, a central axis of said wobbling roller.
7 more elements
Dependencies are inferred from the claim text.