Surface-indented covering member

Details Surface-indented covering member Surface-indented covering member

1991-03-08

1994-01-04

Loney, Donald J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428 68, 428141, 428142, 428161, 428163, 428167, 428172, 428212, 428332, B32B 300

Patent

active

052758648

ABSTRACT:
A covering device includes a surface-indented covering member with at least one groove formed in its surface. The at least one groove has a depth in the range of 0.2 to 0.4 microns and a width which is not more than the depth thereof and is greater than 0 and not more than 0.4 microns. Another covering device includes a surface-indented covering member with a groove formed in its surface, and a covering material disposed on the surface of the member to cover at least the groove thereunder. The depth of the groove is in a range from 0.12 to 0.3 microns, and the width thereof is not more than the depth and is greater than 0 and not more than 0.3 microns. The covering material is transparent and has a refractive index smaller than that of the covering member.

REFERENCES:
patent: 3222697 (1965-12-01), Scheermesser

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