Importance

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Abstract

A constant pressure printing mechanism for use with a hand labeler: a printing platen is mounted on the frame of the hand labeler for pivotal movement toward and away from a position awaiting a coming printing head; the platen is biased apart from the printing head; constant pressure means, responsive to the operation of the hand lever, turn the printing platen toward the printing head to the awaiting position; the constant pressure means includes overridable means carried by either of the hand lever or the printing platen and overriding means carried by the other; when the hand lever is squeezed, the overriding means engages the overridable means thus shifting the platen to its awaiting position and further pressure is applied until the overriding means rides over the overridable means simultaneously as the printing head abuts against the printing platen at the awaiting position; the printing pressure to be applied to the label on the printing platen can be preset at a constant level by the force which is required for causing the ride-over operation.

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First Claim