Method of applying stretch film wrapping to an agricultural...

A - Human Necessities – 01 – F

Patent

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A01F 15/07 (2006.01)

Patent

CA 2634954

A method of applying stretch film wrapping to an agricultural bale using a bale wrapper apparatus which comprises: a bale-supporting table; a dispenser reel arrangement from which stretch film wrapping can be withdrawn to form successive overlapping windings of film which cover the bale; and means for applying relative rotation between the table and the dispenser reel arrangement during a wrapping cycle; in which: each winding (60) of film comprises at least one thin longitudinally extending edge strip portion (61), and an adjoining thicker longitudinally extending portion (62); the thicker portion (62) has a first side (63) adjoining said edge strip portion (61), and an opposed parallel second side (64); and during at least an initial part of the wrapping cycle, each successive overlying winding (60a) laterally overlaps its underlying winding (60) to such an extent that the respective first side (63a) of the thicker portion (62a) of each overlying winding (60a) substantially follows the path of the respective second side (64) of the thicker portion (62) of the underlying winding (60).

La présente invention concerne un procédé servant à appliquer un emballage en film étirable à une bale agricole au moyen d~un appareil d~emballage de bale qui comprend : une table de support de bale ; un agencement de bobine distributrice à partir de laquelle un emballage en film étirable peut être retiré pour réaliser des enroulements de film chevauchants successifs qui couvrent la bale ; et un moyen pour appliquer une rotation relative entre la table et l~agencement de bobine distributrice pendant un cycle d~emballage ; chaque enroulement (60) de film produit comprenant au moins une partie fine de bande de bord (61) qui s~étend dans le sens longitudinal, et une partie (62) plus épaisse contiguë qui s~étend dans le sens longitudinal ; ladite partie plus épaisse (62) possédant un premier côté (63) contigu à ladite partie de bande de bord (61) et un deuxième côté parallèle opposé (64). Pendant au moins une partie initiale du cycle d~emballage, chaque enroulement superposé successif (60a) chevauche latéralement l~enroulement sous-jacent (60) de sorte que le premier côté correspondant (63a) de la partie plus épaisse (62a) de chaque enroulement superposé (60a) suive sensiblement la trajectoire du deuxième côté correspondant (64) de la partie plus épaisse (62) de l~enroulement sous-jacent (60).

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