Platen roll core

Details Platen roll core Platen roll core

1989-01-17

1991-07-16

Eickholt, Eugene H.

Typewriting machines

Platen or platen-moving mechanism

Cylindrical platen

4006613, 29130, 181196, B41J 1102

Patent

active

050320351

ABSTRACT:
A platen roll core has a plurality of roll elements, and spacers interposed between adjacent roll elements of attenuation of propagated vibrations. The core, seen in terms of vibrating system, is equivalent to the sum of vibrating systems independent of one another and corresponding to the respective roll elements. The axial length of each roll element is set to such a value that the natural frequency thereof in an axial flexural oscillation mode is greater than a frequency of vibration applied from a vibration source, to thereby avoid the resonance of the core in the axial flexural oscillation made with the vibration source, such resonance being a main cause of an increase in noise level.

REFERENCES:
patent: 1181959 (1916-05-01), Roberts
patent: 1235753 (1917-08-01), Anderson
patent: 2142260 (1939-01-01), Thompson
patent: 3812782 (1974-05-01), Funahashi
patent: 4215946 (1980-08-01), Nakabo et al.
patent: 4453848 (1984-06-01), Adkisson

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