Method for weakening a portion of a web

Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Perforation by differential fluid pressure; or smoothing,...

Reexamination Certificate

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C264S555000, C264S571000, C264S154000, C264S155000, C264S156000, C264S296000, C425S290000, C425S291000, C425S305100, C425S387100, C425S388000, C225S002000, C225S096000

Reexamination Certificate

active

06838040

ABSTRACT:
A method for weakening a portion of a web includes moving a web in a machine direction between at least a first location and a second location, wherein the second location is positioned downstream of the first location, forming a line of weakness in the web at the first location, wherein the web has a first tensile strength across the line of weakness, and weakening the line of weakness at a second location, wherein the web has a second tensile strength across the line of weakness after the line of weakness is weakened at the second location and wherein the first tensile strength is greater than the second tensile strength.

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Machine translation of JP 10-315339 A, 2004, Japanese Patent Office website.*
International Search Report for PCT/US02/20720, mailed on Sep. 23, 2002.

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