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US 4,060,161 AGranted
Vibration dampening means for printing mechanism
AssigneeNCR Corporation
InventorsCarl R. Nelson, David R. Pierce, Noel F. Depew, Marlyn F. Harp
Life of this patent
Estimating the term…
Abstract
In a matrix print head, a plurality of elongated printing elements, mounted in a frame, are driven axially by electromagnetic means to effect printing on record media positioned adjacent to the printing ends of the printing elements. Freely riding tubular elements are placed on the printing elements between support members forming part of the frame, in order to dampen the bending and vibration of the printing elements, and thus reduce or eliminate consequent fatigue failure.
Claims11
A printing mechanism comprising:
- frame means including at least two support members;
- at least one elongated printing element extending through and supported by said support members and capable of being driven in an axial direction to effect printing;
- driving means operatively connected to said printing element for axially driving said element;
- and
- at least one tubular element having a length less than the distance between adjacent support members, and being unattached to said support members and riding freely on said printing element to dampen undesired transverse movement and vibration thereof.
2 more elements
A printing mechanism comprising:
- frame means including at least first, second and third support members;
- a plurality of elongated printing elements extending through and supported by said support members;
- driving means associated with each printing element for driving it axially in a printing operation;
- a first tubular element riding freely on each printing element between said first and second support members;
- and
- a second tubular element riding freely on each printing element between said second and third support members, said first and second tubular elements being unattached to said support members.
3 more elements
An impact printing mechanism comprising:
- frame means;
- at least one elongated printing element extending through said frame means and actuable in a predetermined path of travel to effect a printing operation on recording media;
- actuating means for effecting traverse of said printing element along said path of travel;
- and
- a tubular-like element unattached to said frame means, capable of axial movement, and free riding on said printing element to prevent any undesired transverse movement thereof.
2 more elements
Dependencies are inferred from the claim text.