Paperboard sheets with a scribed grid and a method for making the same
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United States of America Patent
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Sep 3, 1991
Issued Date -
N/A
app pub date -
May 2, 1989
filing date -
May 19, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A scribed paperboard sheet and a method for its manufacture is characterized by scribing a plurality of parallel guidelines in a finished paperboard web while the web is being tensioned. Adjustable scribing knife assemblies are provided for simultaneously scribing both surfaces of the web, following which the web of scribed paperboard is cut into individual sheets. The depth of penetration and the lateral spacing of the scribing knives are controlled to define a particular scribed layout of lines in the surfaces of the paperboard sheets. Alternatively, a grid of guidelines may be scribed into the web by an embossed roller arranged adjacent a tension roller to define a nip through which the paperboard web passes.
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