Variable speed unwind controller drum
Patent 3938437 Issued on February 17, 1976. Estimated Expiration Date: 
February 17, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 17, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 446138 filed on 02/27/1974US Classes:101/228, Feeding or delivering101/225, Feeding or delivering226/178, To vary speed of material-advancer74/354Swinging carriageExaminersPrimary: Burr, Edgar S.Assistant: Pieprz, William Attorney, Agent or FirmAbstractThe unwind controller drum for metering web material into a web processing machine is positively driven by a positive, fixed-ratio drive train. Several drive ratios are selectively available, each differing only slightly from another to provide minute changes in the drive ratio from the drive to the unwind drum. The changes in drive speed are generally less than .05% to provide positively determined, finite adjustment of the rate that the web material is metered into the web processing equipment. | |
