Paper making and fiber liberation – Processes and products – Including solid non-waterlaid preform
Reexamination Certificate
2003-05-09
2008-09-16
Hug, Eric (Department: 1791)
Paper making and fiber liberation
Processes and products
Including solid non-waterlaid preform
C162S114000, C162S116000, C162S296000, C162S300000, C162S314000
Reexamination Certificate
active
07425245
ABSTRACT:
This invention is directed to improvements in fibrous sheets, such as paper, incorporating an elongate impermeable element, to a method of making such paper and to documents made therefrom. The method comprises the steps of bringing an elongate flexible element into contact with a moving support surface, and depositing fibers onto the support surface to form a fibrous sheet which travels in a machine direction. The said support surface has spaced portions which prevent the substantial deposition of fibers at those portions and form windows at spaced locations in at least one surface of the sheet. The deposition of fibers is carried out in such a manner that as fibers are deposited onto the support surface the elongate element is incorporated in the sheet with regions of the element at least partially exposed at at least one surface of the sheet at said windows. At least a leading edge of the spaced portions is at an angle, in the plane of the sheet, which is not 90° to the machine direction.
REFERENCES:
patent: 987678 (1911-03-01), Howes
patent: 5093184 (1992-03-01), Edwards
patent: 5405500 (1995-04-01), Knight
patent: 5783275 (1998-07-01), Mück et al.
patent: 6616803 (2003-09-01), Isherwood et al.
patent: 0059056 (1982-09-01), None
patent: 2001-172897 (2001-06-01), None
patent: 0039391 (2000-07-01), None
patent: WO 03/040466 (2003-05-01), None
Machine Translation of JP-2001-172897 A, Industrial Property Digital Library [online] [retrieved on Jun. 17, 2007] Retrieved from the Internet:<URL:http://www4.ipdl.inpit.go.jp/Tokujitu/PAJdetail.ipdl?N0000=60&N0120=01&N2001=2&N3001=2001-172897>.
Cordray Dennis
De La Rue International Limited
Dykema Gossett PLLC
Hug Eric
LandOfFree
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