CONSTANT PRESSURE MECHANISM FOR PORTABLE LABEL PRINTING AND APPLYING MACHINE OR THE LIKE

摘要

A constant printing pressure mechanism for a portable label printing and applying machine; the machine has a printing head which is interlocked with a hand lever and it has a platen that carries a label strip disposed opposite to the printing head, the constant pressure mechanism comprises: a constant pressure means to turn the platen up against the type faces of the printing head with a constant pressure in synchronism with the downward movement of the printing head, and a means to release the platen slightly from the printing head immediately after the printing operation. Additionally disclosed are means for adjusting the label striking angle of the printing head type faces by twisting the type face orientations; a linkage arrangement connected with the hand lever for moving inking rollers across the type faces and out of the way of the type faces at printing time; a device for passing the label strip which opens a pathway for the label strip to be inserted into the machine and then recloses the pathway to hold the label strip to a feeding means; a device which rotates the label strip feed roller a desired distance and mechanically blocks inertial overrolling by the feed roller; and a device which regulates the size of the loop formed in the backing strip at the point it is peeled from the overlying label strip.