Patent ID: 7497065
Filing Date: 2009-03-03
Classification: B29C,B65B

Abstract:
1. A device, comprising: a first plate assembly including a first base, a first seal plate, and a first servo motor to provide a linear motion of the first seal plate with respect to the first base; a second plate assembly including a second base and a second seal plate, and a second servo motor to provide a linear motion of the second seal plate with respect to the second base; at least one plate assembly motor operably linked to the first base and the second base to provide a linear motion of the first and second plate assemblies toward each other to perform a sealing operation and away from each other; a controller connected to the at least one plate assembly motor and to the first and second servo motors to coordinate the motion of the first and second seal plates to perform the sealing operation on a web while traveling with the web, at least one tie arm connected to the first plate base and adapted to be influenced by a first eccentric cam; and at least one tie arm connected to the second base and adapted to be influenced by a second eccentric cam; wherein the plate assembly motor is linked to the first and second eccentric cams using a drive shaft to rotate the first and second eccentric cams and provide the linear motion of the first and second plate assemblies toward each other to perform the sealing operation and away from each other, and wherein the first plate assembly includes an air bladder to regulate a pressure of the seal operation.