Apparatus for imparting protusions and recesses and product
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 10, 2007
Grant Date -
May 13, 2004
app pub date -
Nov 2, 2001
filing date -
Nov 2, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An apparatus imparts concaves/convexes to a sheet-like object by passing the sheet-like object between a pair of rollers facing each other. At least one of the rollers is a roller a surface of which is formed by laminating a single or a plurality of circular plates each provided with concaves/convexes at a peripheral edge thereof. An interval keeping mechanism is provided between the circular plates provided with concaves/convexes at the peripheral edges. At least one of the rollers is formed with a roller surface by laminating a single or a plurality of circular plates each having only convexes of concaves/convexes portions at a peripheral edge thereof. By the roller, convexes can be imparted to one face of front and back surfaces of a sheet-like object.
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