Handheld Label Maker

Overview

A handheld label maker prints short adhesive labels on demand from a self-contained, battery-powered unit. The operator types text on a built-in keyboard, sees it on a small screen, and the machine prints it onto a strip of laminated tape that is peeled and stuck down. It uses direct-thermal printing onto a cassette of heat-sensitive, pre-adhesive tape, which keeps the device simple: there is no separate ink, only a heated printhead and a roll of tape.

The body is a moulded clamshell that fits in one hand. The Housing & Covers forms the front and back shells and the battery door. The Print Mechanism holds the thermal printhead, the rubber platen roller, and the stepper that advances the tape. Tape lives in the Tape Cassette Bay, which locates the cartridge and guides the strip past the head. A Cutter Module guillotine trims each finished label, the Keypad Assembly and LCD Panel handle input and preview, and the Main Board ties it together, powered by the Battery Pack.

How it works

Keystrokes from the Keypad Assembly are read by the Main Board, which composes the label as a bitmap and shows it on the LCD Panel. On print, the board drives the stepper in the Print Mechanism to pull tape from the cassette while the platen presses the tape against the printhead.

The thermal printhead is a row of tiny resistive elements; the controller pulses individual elements hot as the tape moves under them, darkening the heat-sensitive layer dot by dot to form characters and graphics at 180 dpi. Because the print is built one vertical column at a time, label length is limited only by tape, not by any page size. Once printing finishes, the operator squeezes the Cutter Module lever to shear the tape, and the laminated label is peeled from its backing. The USB Port recharges the Battery Pack and lets PC software push longer or b-coded labels to the device.