Plastic bobbin

Details Plastic bobbin Plastic bobbin

1982-11-26

1985-05-28

Levy, Stuart S.

Winding, tensioning, or guiding

Bobbin or spool

Cop-tube type

220 72, 2421183, 24211832, B65H 7510, B65H 7520

Patent

active

045195579

ABSTRACT:
A plastic bobbin consisting of a hollow cone defined by a thin-walled sheath includes an inner skeletal frame of longitudinally-spaced circumferential ribs and radially-spaced longitudinal ribs defining an inner support surface for a mandrel with a sheath having segments of varying wall thickness and the outer surface having a constant taper with respect to the bobbin axis. Some of the longitudinally-extending ribs may be partial ribs defined in each of the segments.

REFERENCES:
patent: 2535188 (1950-12-01), Beckner
patent: 3141631 (1964-07-01), Krebs
patent: 3450370 (1969-06-01), Hawkins
patent: 3532291 (1970-10-01), Newman
patent: 4205423 (1980-06-01), Poole et al.

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