Sheet materials

Details Sheet materials Sheet materials

1982-02-18

1984-07-31

Chin, Peter

Paper making and fiber liberation

Processes and products

Including solid non-waterlaid preform

162108, 162109, 162110, 162116, 162140, D21D 300

Patent

active

044628668

ABSTRACT:
A sheet material such as paper is provided during manufacture with an elongate element partially disposed within the thickness of the paper sheet but exposed at spaced locations one one side of the sheet. The paper may be used in making security documents such as banknotes and checks.

REFERENCES:
patent: 1903711 (1933-04-01), Wendel
patent: 3720578 (1973-03-01), Heling et al.
Wochenblatt fur Papierfabrikation, nr. 19, 1957, FRG, pp. 740-741; P. Hornle: "Naturliche oder kunstliche Wasserzeichen", entire article.

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