Process for producing a ring-shaped one-color or multi-color ribbon and a ribbon produced in accordance with this process
AssigneeSiemens Aktiengesellschaft
InventorsGuenter Klauke, Anton Wimmer
Life of this patent
Estimating the term…
Abstract
A continuous or ring-shaped printing ribbon is constructed by overlapping the ends of a length of ribbon made of thermoplastic synthetic material and welding the overlapped ends together along a grid work of fine weld lines, thereby providing a weld joint comprising a punctiform arrangement of ink-bearing cells to effect an undisturbed emission of ink across the joint during a printing operation.
Claims6
In a ring-shaped ribbon made of thermoplastic material having at least one color track and formed from a strip of the ribbon of finite length, the end portions of which are overlapped and fused to form a continuous ribbon, the improvement wherein the overlapped end portions of the ribbon strip are welded in grid form to provide a series of spaced welded line joints having ink-bearing cells therebetween.
In the method of making a ring-shaped thermoplastic ribbon having at least one color track, by overlapping the end portions of a strip of the ribbon of finite length and fusing said end portions to form a continuous ribbon, the improvement wherein said end portions are fused by welding same under conditions of pressure and temperature in a grid form to retain ink-saturated cells within said end portions.
A sonotrode for use in ultrasonic welding device for welding the overlapping end portions of a strip of ribbon to form a continuous ribbon comprising a working surface, and prominences formed on said working surface and arranged in the manner of a grid.
Dependencies are inferred from the claim text.