Apparatus for manufacturing an expanded web of sheet material and a composite expanded web
Patent 4582507 Issued on April 15, 1986. Estimated Expiration Date: 
May 23, 2004. 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 23, 2004. 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 ReferencesInventorApplicationNo. 06/613160 filed on 05/23/1984US Classes:493/381, Plural indeterminate length members156/197, By separating laminae between spaced secured areas (e.g., honeycomb expanding)493/42, With shaping or compacting of filter material493/966HONEYCOMB STRUCTUREExaminersPrimary: Bray, W. DonaldAttorney, Agent or FirmInternational ClassesA24D 1/00 (20060101)A24D 1/02 (20060101) B31F 1/28 (20060101) B31F 1/20 (20060101) AbstractAn apparatus having rotary shearing and forming dies which expand a web of formable material by imparting to the web a surface configuration having rows of generally sinusoidal convolutions extending longitudinally along the web, each row lying 180° out of phase from abutting rows. The meshing rotary dies include flat portions defining a neutral zone wherein no web deformation occurs, with the result that each convolution in a row is joined to the next longitudinally succeeding convolution by a flat web section lying in the original plane of the formable sheet material. The expanded web is laminated to a flat web of paper-like material and the resulting composite web is converted to expanded cigarette wrappers. | |
