For stick-style black tea bag machines, suppliers like Universal Pack, All-Fill, Spackmachine, and manufacturers listed on Alibaba and Made-in-China (such as Xiamen Sengong) offer solutions, focusing on vertical form-fill-seal (VFFS) or specialized stick pack machines that handle granules or fine powders for inner/outer bags, often with options for string/tag and self-standing pouches. Look for companies specializing in high-speed, precise packaging for granules and powders, often from Germany, Italy, or China, to find the right fit for your "Java" (fine/powdered) black tea needs.