Abstract: A method of wrapping articles in plastic, whereby the cross-section of the article dictates variations in the length of plastic web required at various times, with a mechanical wrapper that revolves around the article and has at least one take-off cylinder rotating at a rate controlled in accordance with a sequence of values that depends on the article's cross-section, and releasing plastic in the length required at a particular time. The sequence of values exploited for controlling the take-off cylinder (7) is determined during at least the first revolution of the winder (5) by measuring the stress on the web downstream of the take-off cylinder in the accordance with the angle (.PHI.) of the winder, is stored in a memory (15), and is appropriately standardized for varying the rate of rotation of the take-off cylinder.

Abstract: Process and apparatus for an orbital stretch wrapper to form two superimposed layers of opposite pitch on items or bundles. Shrinkable film is drawn off two separate supply rolls under tension simultaneously in opposing rotational directions. The rolls are placed successively along the length of a conveyor belt separated by at least one width of the film.