Patent ID: 7677963

Claim:
An enclosing structure for enclosing and isolating a packaging machine from an outer environment comprising: one or more enclosing panel means assembled together to define an inner environment within which the packaging machine is located, at least one juncture located adjacent an edge of the one or more enclosing panel means, at least one enclosing panel means being a movable wing, hinged to an upright of the enclosing structure, said one or more enclosing panel means separating the inner environment of the enclosing structure which is substantially enclosed and isolated from the outer environment, said movable wing being formed by a first panel and a second panel, fixed together in a facing relation on opposite sides of a frame, the first panel and the second panel being fixed at a distance relative to each other to form an intermediate space therebetween, a flow of purified air being circulatable through said intermediate space, the movable wing having at least one air sealable end; said first panel facing said inner environment and having at least one inner air conveying channel for passing purified air from the intermediate space past the frame and into the inner environment, the inner air conveying channel situated near at least one edge of said first panel disposed at said at least one air sealable end of said movable wing, said inner air conveying channel being in fluid communication with said inner environment, so that a flow of purified air passes from the intermediate space through the inner air conveying channel toward the inner environment at the at least one edge of said first panel; said second panel facing said outer environment and having at least one outer air conveying channel for passing purified air from the intermediate space past the frame and to the outer environment, the outer air conveying channel situated near at least one edge of said second panel disposed at said at least one air sealable end of said movable wing, said outer air conveying channel being in fluid communication with said outer environment, so that a flow of purified air passes from said intermediate space through said outer air conveying channel toward the outer environment at the at least one edge of said second panel, the purified air passing through the inner conveying channel and the outer conveying channel forming a fluid-dynamic sealing barrier at the at least one air sealable end of said movable wing for preventing contaminants from entering the inner environment at the at least one air sealable end of said movable wing.