CORE MANUFACTURING METHOD AND CORE Russian patent published in 1999 - IPC

Abstract RU 2142365 C1

FIELD: paper, textile and polymeric productions. SUBSTANCE: method relates to cores with spiral winding of cardboard layers superposed one upon the other. Method consists of winding, gluing and drying so that moisture content value of at least part of layers delivered to stage of winding differs in one layer from that in the other, thus ensuring gradual stepped variation of moisture content in core wall. This reduces possibility of unwanted stress occurrence on stage of drying. EFFECT: enhanced strength and resistance to loads. 9 cl, 1 tbl

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RU 2 142 365 C1

Authors

Korkhonen Pertti

Dates

1999-12-10Published

1997-03-10Filed