Device for forming groove pattern of light-guiding plate and...

Details Device for forming groove pattern of light-guiding plate and... Device for forming groove pattern of light-guiding plate and...

2007-01-09

2007-01-09

Heckenberg, Donald (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Severing means is perforator

C425S299000, C425S385000, C083S697000

Reexamination Certificate

active

10618738

ABSTRACT:
A device and method for forming a groove pattern in a light-guiding plate for obtaining high luminance and decreasing processing time, thereby improving yield. The device has a tool unit including a tool guide and a head which is further provided with heating plate disposed below the tool unit; a stamper disposed under the heating plate; and a plurality of cutting tools extending from a lower side of the stamper at fixed intervals, for forming a plurality of groove patterns in a surface of the light-guiding plate.

REFERENCES:
patent: 4642086 (1987-02-01), Howarth, Jr.
patent: 5635256 (1997-06-01), Olson

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