Long wearing movie film bobbins with floating hubs

Details Long wearing movie film bobbins with floating hubs Long wearing movie film bobbins with floating hubs

1977-04-25

1979-05-01

McCarthy, Edward J.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

B65H 7518

Patent

active

041519639

ABSTRACT:
This invention provides a long wearing and wear resistant construction of a movie film bobbin having a floating hub. Because of the relative rotation of the hub and panels in this type bobbin and the desired close tolerances, there is a tendency for the parts to wear. This wear is primarily in the radial direction where the panels meet the hub. Thus, a special metallic bearing ring stamping from a flat washer provides a cylindrical surface so that the washer is interspersed between hub and panels with the cylindrical surface engaging the panels in the radial wear direction.

REFERENCES:
patent: 3883087 (1975-05-01), Praag
patent: 4002309 (1977-01-01), Ruiz-Barbotteau

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