Combination writing board/reflecting screen sheet

Details Combination writing board/reflecting screen sheet Combination writing board/reflecting screen sheet

2007-12-04

2007-12-04

Chevalier, Alicia (Department: 1772)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

C428S141000, C359S455000

Reexamination Certificate

active

10111901

ABSTRACT:
A sheet for a writing board and a reflection type screen has excellent writability and erasability when used as a writing board and excellent anti-glare property without hot spots when used as a reflection type screen. This sheet includes a resin layer presenting a writing surface with unevenness having an arithmetical mean deviation (JIS-B-0601) of 1.0-4.0 μm and a mean spacing of profile irregularities (JIS-B-0601) between adjacent protrusions of 30-300 μm formed by embossing. The resin layer preferably contains as an ultraviolet ray curable resin. Since the unevenness is formed on the resin layer by embossing, ink does not penetrate the resin layer and hence the sheet has excellent erasability.

REFERENCES:
patent: 4123590 (1978-10-01), Hasegawa et al.
patent: 5024898 (1991-06-01), Pitts et al.
patent: 5361164 (1994-11-01), Steliga
patent: 5547724 (1996-08-01), Kuribayashi
patent: 409254550 (1997-09-01), None
patent: 11254885 (1999-09-01), None

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