Paper making and fiber liberation – Processes and products – Non-uniform – irregular or configured web or sheet
Patent
1978-10-19
1980-12-16
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-uniform, irregular or configured web or sheet
162123, 162198, 162208, 162213, 162259, 162292, 162299, 162300, 162361, D21H 502, D21F 100
Patent
active
042395917
ABSTRACT:
A non-laminated paper sheet product characterized by regions or islands of increased thickness, usually located in the center of the sheet for more economical use of the paper product and for conservation of wood pulp. The regions of increased thickness are formed by depositing or laying additional pulp stock onto a generally uniform thickness paper web in the web-forming area of a paper machine in either wet or dry methods of paper production. Continuous regions of increased thickness in the web can be formed by corresponding variations in the width of the web or by spraying the additional pulp onto the forming web. Islands of increased web thickness can be formed by periodically interrupting pulp stock depositing sprayheads disposed at spaced locations across the width of the forming web, with timing devices or web thickness sensors controlling the sprayheads.
REFERENCES:
patent: 670847 (1901-03-01), Cornel
patent: 762914 (1904-06-01), Kron
patent: 1605491 (1926-11-01), Williams
patent: 3119730 (1964-01-01), Johnson
patent: 4032394 (1977-06-01), Back
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