ENGRAVING APPARATUS
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United States of America Patent
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Issued Date -
Jul 18, 2013
app pub date -
Jan 18, 2013
filing date -
Jan 19, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An engraving apparatus of rubbing rollers for manufacturing retarder films is provided. The engraving apparatus comprises a body and an engraving end including a plurality of micro-groove structures. The plurality of micro-groove structures of the engraving end are arranged in parallel or irregularly. The engraving apparatus rubs on the rollers using the engraving end in a predetermined direction. Then the predetermined pattern structures are rubbed on the roller. In the rubbing process, the engraving apparatus can rub different pattern structures backwards and forwards directly without to move the engraving apparatus to the starting position of engraving paths. It keeps the manufacturing speed to manufacture the retarder film for saving the process time and the manufactured retarder film with the accuracy.
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