Packaging machine and method

B - Operations – Transporting – 65 – B

Patent

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Details

B65B 57/08 (2006.01) B65B 51/14 (2006.01) B65B 51/30 (2006.01) B65B 57/02 (2006.01)

Patent

CA 2103687

ABSTRACT A jam prevention device comprises a light beam source that emits a light beam and is located on a main frame structure of a packaging machine in the machine's sealing section. During operation, the light beam is reflected off tworeflective surfaces located on a moveable support operably connected to a prime mover. The reflected beam is received by a receiver located opposite the source.A clamping sub-assembly includes a seal bar and a reciprocatable seal pad housing. The housing is spring-mounted on the clamping sub-assembly and substantially surrounds the seal bar. The reflective devices are mounted on the housing. The prime mover moves the clamping sub-assembly towards a heater bar sub-assembly. The housing defines two cavities for receiving the reflective devices. The movement of the clamping sub-assembly brings a loaded bag into contact with the heater bar sub-assembly for the purpose of effectuating a seal of the bag. The pressure applied by the clamping sub-assembly during the meeting of the clampingsub-assembly and the heater bar sub-assembly causes the housing to move during the sealing process thereby moving the reflective devices into the cavities and disrupting the light beam. A photo-sensor is provided for detecting the reflection of the light beam during the sealing process as just described. Control structure either allows or disallows the sealing process to continue based upon detection of the light beam.

Poutre d'appui de rayons d'entreposage ayant un profil tubulaire, qui définit un rebord s'ouvrant vers le haut et vers l'intérieur, et qui définit une surface porte-inscription généralement plate qui fait face à l'extérieur vers le bas ou le haut à un angle allant d'environ 20.degrés. à environ 70.degrés. par rapport à un plan vertical. Parfois, le profil tubulaire peut définir deux de ces surfaces qui forment à elles deux un angle obtus, nommément une surface supérieure à un angle d'environ 20.degrés à environ 45.degrés et une surface inférieure à un angle d'environ 45.degrés à environ 70.degrés, ou une surface porte-inscription généralement arquée de dimension convenable. La surface porte-inscription permet à une personne qui se tient debout, ou qui est assise sur un chariot élévateur, d'avoir une visibilité directe généralement perpendiculaire à cette surface. La poutre d'appui peut aussi être utilisée en combinaison avec un dispositif d'extinction d'incendie en position appropriée pour éteindre un incendie dans une charge supportée. Lorsque le dispositif d'extinction d'incendie est en marche, le liquide libéré tombe sur la surface porte-inscription, qui peut être inclinée ou courbée, et sur la charge.

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