Method for making sheet materials and security paper

Details Method for making sheet materials and security paper Method for making sheet materials and security paper

1993-05-05

1995-04-11

Chin, Peter

Paper making and fiber liberation

Processes and products

Including solid non-waterlaid preform

162110, 162140, 162268, 162314, 162322, D21H 510

Patent

active

054055008

ABSTRACT:
This invention relates to a method of making sheet materials and security paper having partially embedded therein an elongate security element which is at least substantially exposed at one surface of the sheet at a plurality of spaced locations, which method comprises the steps of depositing fibres onto a moving support surface, supplying an elongate security element to overlie rotatable embedment means, which embedment means comprise a plurality of spaced-apart raised portions having recesses therebetween, introducing the security element into the fibres with rotation of the embedment means such that some fibres move into said recesses between the security element and the embedment means so that said security element is covered by fibres, and substantially preventing fibres from penetrating between the raised portions and the overlying security element.

REFERENCES:
patent: 4462867 (1984-07-01), Fuller
patent: 4534398 (1985-08-01), Crane
patent: 4943093 (1990-07-01), Melling et al.

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