Printing head for portable labeling machine, or the like

摘要

An improved rotary printing head for being mounted on a portable labeling machine or the like comprising a plurality of side-by-side indexing wheels all having polygonal shape; the peripheral sides of the polygonal indexing wheels are either provided with types or they support stamp belts having types thereon; the indexing wheels are supported at their axes by a fixed positioning member which is provided with a respective, elastic engagement piece for each indexing wheel, and the engagement pieces each have index wheel engagement projections; particular desired types on the indexing wheels can be accurately positioned by rotating the indexing wheel and then bringing the engagement projections into engagement with indexing grooves formed on the inside surface of the indexing wheels.