Core member for platen roll

Details Core member for platen roll Core member for platen roll

1985-12-18

1988-04-12

Pearson, Charles A.

Typewriting machines

Platen or platen-moving mechanism

Cylindrical platen

400689, B41J 11053

Patent

active

047370467

ABSTRACT:
A platen roll core member including an axle part, an external tube part coaxially disposed around the axle part and webs extending therebetween having a plurality of projections formed by at least one surface extending rectilinearly in the axial direction and integrally formed on either the outer surface of the axle part, on the inner surface of the external tube part or on both the outer surface of the axle part and the inner surface of the external tube part. Striking sounds generated as the platen roll core member is struck from outside make irregular reflections within a cavity of the core member due to the plurality of projections which results in quieter operation of the platen roll.

REFERENCES:
patent: 589663 (1897-09-01), Mengis
patent: 1116395 (1914-11-01), Dowd
patent: 2266275 (1941-12-01), Schuler
patent: 3393789 (1968-07-01), Keiter
patent: 4453848 (1984-06-01), Adkisson et al.

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