Patent ID: 7344671

Claim:
A method of sealing or cutting optically with at least one laser beam flexible polymeric films, the method comprising: superposing and bringing into contact at least two of said films together by actuating a support mechanism interconnecting two jaws of an optical damp to allow a closing of the clamp whereupon said films are pressed between said jaws about an area to be sealed/cut with the area being free of contact with at least one of said jaws, exposing said area of the films to said at least one laser beam by directing the laser beam through an aperture of at least one of said jaws of said optical clamp, the area corresponding to a volume of said polymeric films to be sealed or cut, providing an incident laser beam intensity, for the purpose of one of sealing and cutting said films, increasing an intensity of the laser beam in the volume by re-injecting partly or totally an unabsorbed portion of the incident laser beam intensity that has not been absorbed by the films back to the films by using at least one reflective device, therefore improving the efficiency of the sealing or cutting method by having more light intensity of said incident laser intensity absorbed by the films.