B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
B65B 51/00 (2006.01)
Patent
CA 2333754
A method and apparatus for forming a tamper resistant sea] on a plastic bag containing a loaf of bread or other products is disclosed. The neck (125) of the bag (125b) is flattened, gripped between a pair of upper inboard and outboard gathering belts and a pair of lower inboard and outboard gathering belts adjacent opposite sides of a segment of the neck of the bag. A row of perforations(132) is formed in the bag neck as the bag moves adjacent a roller provided with teeth or cutting elements. Heated air jets are directed to engage the segment of the bag bridging between the inboard and the outboard gathering belts for fusing panels of the bag together to form a sealed strip spaced from the row of perforations in the bag neck to facilitate removal of the sealed strip from the bag.
Cette invention a trait à une technique ainsi qu'à l'appareil correspondant permettant de sceller de manière inviolable un sac plastique contenant un pain ou d'autres articles. Le col (125) du sac (125b) est aplati puis pincé entre deux courroies ramasseuses supérieures, intérieure et extérieure, et deux courroies ramasseuses inférieures, intérieure et extérieure, adjacentes aux cotés opposé d'une partie du col du sac. Une rangée de perforations (132) est ménagée dans le col du sac alors que celui-ci se déplace contre un rouleau à dents ou à éléments de coupe. Des jets d'air chaud sont dirigés sur la partie du sac insérée entre les courroies ramasseuses de manière à fondre les parois du sac pour former une bande de scellement séparée de la rangée de perforations et ce, afin de faciliter l'enlèvement de la bande du sac.
Pack Jerry Dale
Stoddard Luther B.
Burford Corp.
Riches Mckenzie & Herbert Llp
LandOfFree
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