System for sealing a packaging wrapper
View Patent ↗A system for sealing a packaging wrapper around an object directs a flow of heated air to end flaps of the wrapper to move the end flaps into sealing contact with a body section of the wrapper to substantially enclose the object. The system includes an oven, a conveyor, a source of heated air and a means for deflecting the flow of heated air to the conveyor to seal end flaps of the wrapper with a body section of the wrapper. In use, an object surrounded by the wrapper body section is moved through the oven on a conveying surface of the conveyor, and heated air is moved through the oven bypassing the conveying surface to a region below the conveying surface. The heated air flow then encounters the means for deflecting the heated air flow, which directs the air flow upward and through the conveying surface to impact and move the end flaps into sealing contact with the wrapper body section.
1. A system for improving the end seal of a wrapped object, the object having a wrapper body surrounding the object with opposing end flaps extending from the body, the system comprising:
an oven;
a conveyor positioned in the oven and having a conveying surface operative to convey an object through the oven, the conveying surface configured to allow air flow therethrough;
a source of heated air for moving a volume of air through the oven bypassing the conveying surface to a region below the conveying surface; and
means, positioned within the oven, for deflecting the heated air flow entering the region below the conveying surface upward and through the conveying surface to impact the opposing end flaps and move the flaps upward into substantially simultaneous sealing contact with the wrapper body.
2. The system of claim 1 , wherein the conveying surface of the conveyor has opposing lateral side edges, and wherein the source of heated air comprises:
one or more heating elements;
one or more fans moving air over the one or more heating elements; and
a set of dampers positioned adjacent to the lateral side edges of the conveying surface to guide the heated air flow around the conveyor surface to the region below the conveying surface.