04609518 is referenced by 404 patents and cites 38 patents.

A continuous, multi-phase process for debossing and perforating a substantially continuous web of substantially planar polymeric film to coincide with the image of one or more forming structures, each having a patterned forming surface with a multiplicity of holes and an opposed surface. Each forming structure is open from the holes in the forming surface to its opposed surface. The web of film has an indefinite length, a first surface, a second surface and a thickness. The thickness comprises the distance between the first surface and the second surface. The process comprises at least two sequential forming phases, one of which involves three-dimensional conformance of the web to the macroscopic profile of the forming structure and another of which involves aperturing of the web to coincide with fine-scale apertures in either the same or a separate forming structure. The order in which the phases are carried out will depend upon the properties desired in the resultant macroscopically expanded, three-dimensional, apertured polymeric web. Because the process is carried out in sequential phases, previously incompatible characteristics which could not be provided by prior art single-phase forming processes can now be achieved.

Title
Multi-phase process for debossing and perforating a polymeric web to coincide with the image of one or more three-dimensional forming structures
Application Number
6/740145
Publication Number
4609518
Application Date
May 31, 1985
Publication Date
September 2, 1986
Inventor
E Kelly Linman
Cincinnati
OH, US
George M Vernon
West Chester
OH, US
Donald L Gerth
Cincinnati
OH, US
James C Baird
Cincinnati
OH, US
John J Curro
Cincinnati
OH, US
Agent
Richard C Witte
John V Gorman
E Kelly Linman
Assignee
The Procter & Gamble Company
OH, US
IPC
B29C 69/02
B29C 59/06
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