8439.91.10.00 - Bed plates, roll bars and other stock-treating parts 🖩

HTS code 8439.91.10.00 specifically enumerates bed plates, roll bars, and other critical stock-treating components designed for use in machinery that manufactures pulp from fibrous cellulosic materials. These parts are integral to the processes within paper and paperboard production where raw fibrous material is prepared, refined, and treated to achieve the desired consistency and quality before being formed into paper or paperboard. Examples include specialized plates that support and guide the fibrous stock, and various types of rolls that apply pressure, dewatering, or surface treatments during the pulping stages.

This classification is distinct from its sibling category, 8439.91.90.00 ("Other"), by focusing on a defined set of components with specific functional roles in stock treatment. While "Other" would encompass any remaining parts for pulp-making machinery not specifically listed, 8439.91.10.00 targets the precise elements that directly interact with and modify the fibrous material in its pre-paper formation state, such as crushing, grinding, or chemical treatment stages.

As a leaf node, this category does not have further subdivisions. Therefore, classification under 8439.91.10.00 relies on the direct identification of the component as a bed plate, roll bar, or other part whose primary function is stock treatment within the context of pulp manufacturing machinery. The specific material composition or manufacturing process is generally secondary to its defined functional purpose within this specialized area of paper production machinery.