Winding – tensioning – or guiding – Bobbin or spool – Cop-tube type
Patent
1994-01-21
1996-04-09
Stryjewski, William
Winding, tensioning, or guiding
Bobbin or spool
Cop-tube type
138140, 138144, 156195, 24211831, 2421187, 2421188, 2426101, 428 342, 428 3691, B65H 7510, F16L 916
Patent
active
055053955
ABSTRACT:
A multi-grade spirally wound paperboard winding core of enhanced resistance to inside diameter deformation includes a plurality of structural paperboard layers having at least two predetermined densities including a lower density and a higher density wherein the lower density is at least about 3% less than the higher density. The cylindrical bodywall is defined in radial cross section by at least one centrally located paperboard layer disposed between at least one radially inwardly located structural paperboard layer and at least one radially outwardly located structural paperboard layer. The centrally located paperboard layer is formed from the lower density paperboard and the inwardly and outwardly located structural paperboard layer are formed from higher density paperboard.
REFERENCES:
patent: 2363967 (1944-11-01), Jasper
patent: 2751936 (1956-06-01), Dunlap et al.
patent: 2755821 (1956-07-01), Stahl
patent: 3194275 (1965-07-01), Biggs, Jr. et al.
patent: 3323751 (1967-06-01), Cunningham et al.
patent: 3362655 (1968-01-01), Roediger
patent: 3400029 (1968-09-01), Mesrobian
patent: 3429552 (1969-02-01), Cunningham et al.
patent: 3548883 (1970-12-01), Cohen
patent: 3553046 (1971-02-01), Rawford et al.
patent: 3581744 (1971-06-01), Voss et al.
patent: 3587656 (1971-06-01), Cunningham
patent: 3813026 (1974-05-01), Biancamaria
patent: 3826445 (1974-07-01), Le Hardy
patent: 4792326 (1988-12-01), Tews
patent: 5167994 (1992-12-01), Paulson
patent: 5393582 (1995-02-01), Wnag et al.
T. D. Gerhardt, External Pressure Loading of Spiral Paper Tubes: Theory and Experiment; Journal of Engineering Materials and Technology; vol. 112, pp. 144-150 (1990).
Gerhardt Terry D.
Qiu Yanping
Sonoco Products & Company
Stryjewski William
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