Process for inserting rigid segments in security paper

Paper making and fiber liberation – Processes and products – Including solid non-waterlaid preform

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Details

162105, 162140, 156265, 156302, 156303, D21H 2142

Patent

active

050205811

ABSTRACT:
A process for inserting rigid segments into a paper web being formed in a paper manufacturing process that includes the use of a paper forming screen roll, including the steps of cutting segments from a continuous rigid wire material and placing the rigid segments on a continuous strip of an adhesive carrier and placing elastic filler between the rigid segments placed on the carrier, forming a continuous elastic jacket covering the rigid segments and the filler means thereby forming a hybrid band. Through tensioning, the hybrid band is pre-stressed before feeding the pre-stressed hybrid band to the paper forming screen roll, sensing the position of the hybrid band on the paper forming screen roll, sensing the position of the hybrid band on the paper web, and regulating and controlling the positioning of the hybrid band through the adjustment of the tensioning in accordance with the position of the hybrid band in the paper web.

REFERENCES:
patent: 3915780 (1975-10-01), Broussard, Jr.
patent: 4160694 (1979-07-01), Futcher
patent: 4496428 (1985-01-01), Wells
patent: 4511616 (1985-04-01), Pitts et al.
patent: 4761205 (1988-08-01), Crane

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