Structured surface articles containing geometric structures with compound faces and methods for making same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 28, 2007
Grant Date -
Jul 17, 2003
app pub date -
Jan 3, 2003
filing date -
Apr 7, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A process for making molds for retroreflective sheeting and like articles includes making a substrate having a structured surface of geometric structures such as cube corner elements. The structured surface is in one embodiment partially replicated from a previous generation structured surface, and partially machined in the substrate. At least one of the faces of the structured surface is a compound face that has one machined portion and one non-machined portion, such as a replicated portion. The process can be used to manufacture substrates with desirable geometry cube corner elements, such as cube corner elements having a hexagonal outline in plan view, without requiring the use of pin bundling techniques or laminae. The process can also be used to manufacture articles having cube corner elements in which at least one face of the cube corner element has two constituent faces disposed on opposed sides of a transition line that is nonparallel to a nondihedral edge of such cube corner element.
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