Patent ID: 7968817

Claim:
A method for providing an enclosure including a welded seam, comprising the steps of: a) providing a first and a second casing members of a weldable material; b) inserting a heat sensitive material within the first casing member; c) mating the first casing member to the second casing member with a first outer edge of the first casing member providing a perimeter in direct contact with t second casing member, thereby providing the enclosure housing the heat sensitive material therein; d) providing a laser; e) intermittently turning the laser on and off in a first welding pass around and along the perimeter of the first casing member contacting the second casing member such that a laser beam generated by the laser is directed to the perimeter, thereby providing at least two first intermittent welds spaced from each other by at least two unwelded sections at the perimeter, wherein each of the at least two first welds has a first weld starting point and a first weld end point, both of these weld points being located along the perimeter of the first casing member contacting the second casing member; and f) intermittently turning the laser on and off in a second welding pass such that the laser beam is directed to unwelded sections of the perimeter to provide at least two second intermittent welds, wherein each of the at least two second welds has a second weld starting point beginning at a first weld end point and a second weld end point ending at the beginning point of the next one of the first welds along the perimeter of the welded seam.