Glue transfer apparatus for cigarette filters
Patent 4208956 Issued on June 24, 1980. Estimated Expiration Date: 
June 7, 1998. 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.
June 7, 1998. 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 References 2236579 2674974 3464421 3799041 3926148 InventorAssigneeApplicationNo. 05/913267 filed on 06/07/1978US Classes:493/46, Prior to assembly with other cigarette filter material118/247, Intermittently acting work back-up493/45Cutting continuous length rod into determinate lengthsExaminersPrimary: Coan, James F.Attorney, Agent or FirmInternational ClassesA24D 3/00 (20060101)A24D 3/02 (20060101) AbstractA filter is formed by placing increments of glue in spaced apart relation on a moving stream of plug wrap paper and thereafter depositing alternating fibrous filter sections on the glue increments. Particulate material is then deposited between the fibrous filter sections and the plug wrap paper wrapped about the filter sections to form an endless rod. Two-filter filter plugs are severed from the rod by cutting through the unglued fibrous filter section and thereafter the charges of particulate filter material are compacted by moving the unglued outer filter sections of each plug inwardly. Each plug is then joined to two tobacco columns and cut in half. The resultant filters each have a fibrous filter section at the exposed end glued to the plug wrap paper, a compacted particulate section and an unglued fibrous filter section at the tobacco end. | |
