Method and apparatus for forming carton blanks
Patent 4963126 Issued on October 16, 1990. Estimated Expiration Date: 
May 5, 2009. 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.
May 5, 2009. 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 2425041 3137218 Handle bag making apparatus Patent #: 4386924 InventorAssigneeApplicationNo. 347661 filed on 05/05/1989US Classes:493/354, By use of composite cutting, breaking, tearing, or abrading tool and form scoring or crushing tool493/342, With scrap material separation or removal493/400, With means to advance or position work or product493/472With ejector or stripperExaminersPrimary: Terrell, William E.Attorney, Agent or FirmInternational ClassesB31B 001/16B31B 001/25 B31B 001/12 AbstractMethod and apparatus for preventing the curling of a composite material having a fluid permeable base and a fluid impermeable outer surface in a manufacturing operation wherein a continuous sheet of the composite material is moved in incremental amounts through a cutter-creaser apparatus to have carton blanks formed therein wherein the curling is prevented by forming a curtain of air under pressure to apply downwardly directed forces on the fluid impermeable surface during the incremental movement of the continuous sheet through the cutter-creaser apparatus and the forming of the carton blanks. | |
