Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified... – With charge transferring layer of specified composition
Patent
1990-10-30
1992-12-22
Robinson, Ellis P.
Stock material or miscellaneous articles
Liquid crystal optical display having layer of specified...
With charge transferring layer of specified composition
428154, 428156, 428166, 428172, 428178, 428179, 428182, 162111, 162112, 162113, B32B 100, B32B 300
Patent
active
051733510
ABSTRACT:
A combined sheet material including at least two absorbent sheets, such as of cellulose-cotton, each having a density of between from 10 to 40 g/m.sup.2. Each of the sheets is separately embossed by calendaring them into a pattern of protuberances distributed in a first pitch along a first direction for each sheet (P.sub.1 sm, P.sub.2 sm) and in a second pitch in a second direction for each sheet (P.sub.1 st, P.sub.2 st) which subtends the first direction at an angle other than zero. The end of the protuberances extending away from the plane of each of the sheets includes a flat bonding element whereby the two sheets are bonded to each other, preferably by gluing. The pattern of each of the sheets is characterized in that the first pitch of each sheet along the first direction is different and related by the equation.
REFERENCES:
patent: 3017317 (1962-01-01), Voightman
patent: 3414459 (1968-12-01), Wells
patent: 3672950 (1972-06-01), Murphy
patent: 4100017 (1978-07-01), Flautt
patent: 4320162 (1982-03-01), Schulz
patent: 4671983 (1987-06-01), Burt
patent: 4978565 (1990-12-01), Pigneul
Hungler Joel
Laurent Pierre
Ruppel Remy
Ahmad Nasser
Kaysersberg S.A.
Robinson Ellis P.
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