Process for fabricating flexible belts using laser ablation

A process for fabricating a flexible belt comprising, providing a flexible sheet having a substantially rectangular shape, said sheet having a first major exterior surface opposite and parallel to a second major exterior surface and a first edge surface of a first marginal end region of said sheet opposite to and parallel with a second edge surface of a second marginal end region;

• removing by ablation with a masked excimer laser beam a first segment of material from said first major exterior surface at said first marginal end region to form a first step shaped ledge, said first step shaped ledge comprising a first tread extending from said first edge surface to a first riser, said first riser being substantially perpendicular to said first major exterior surface and parallel to and spaced from said first edge surface of said first marginal end region, and said first tread being substantially parallel to and spaced from said second major exterior surface;
• removing by ablation with a masked excimer laser beam a second segment of material from said second major exterior surface at said second marginal end region to form a second step shaped ledge, said second step shaped ledge comprising a second tread extending from said second edge surface to a second riser, said second riser being substantially perpendicular to said second major exterior surface and substantially parallel to and spaced from said second edge surface of said second marginal end region, and said second tread being substantially parallel to and spaced from said first major exterior surface, said second step shaped ledge being a reverse mirror image of said first step shaped ledge;
• overlapping said first marginal end region over said second marginal end region whereby said first tread mates with said second tread, said first riser mates with said second edge surface, and said second riser mates with said first edge surface;
• and fusing the overlapped end regions together to form a fused seam.

A process for fabricating a flexible belt comprising, providing a flexible sheet having a substantially rectangular shape, said sheet having a first major exterior surface opposite and substantially parallel to a second major exterior surface and a first edge surface of a first marginal end region of said sheet opposite to and substantially parallel with a second edge surface of a second marginal end region;

• removing by ablation with a masked excimer laser beam a first segment of material from said first major exterior surface to form a first channel substantially parallel to and spaced from said first edge surface of said first marginal end region by a first ribbon shaped zone on said first major exterior surface, said first channel having a first wall, a second wall and a floor, said first wall being substantially perpendicular to said first major exterior surface and closer to said first edge of said first marginal end region than said second wall;
• removing by ablation with a masked excimer laser beam substantially all surface material to a predetermined depth from said first ribbon shaped zone to form a first plateau having a substantially flat surface parallel to said second major surface, said predetemined depth being less than the height of said second wall of said first channel;
• removing by ablation with a masked excimer laser beam a second segment of material from said second major exterior surface to form a second channel parallel to and spaced from said second edge of said second marginal end region by a second ribbon shaped zone on said second major exterior surface, said second channel having a first wall, a second wall and a floor, said first wall of said second channel being substantially perpendicular to said second major exterior surface and closer to said second edge of said second marginal end region than said second wall of said second channel, said second channel and said second ribbon shaped zone being a reverse mirror image of said first channel and said first ribbon shaped zone, respectively;
• removing by ablation with a masked excimer laser beam substantially all surface material to a predetermined depth from said second ribbon shaped zone to form a second plateau having a flat surface substantially parallel to said first major surface, said predetemined depth being less than the height of said second wall of said second channel;
• overlapping said first marginal end region over said second marginal end region whereby said flat surface of said first plateau mates with said floor of said second channel, said flat surface of said second plateau mates with said floor of said first channel, said second wall of said first channel mates with said second edge surface, said second wall of said second channel mates with said first edge surface, and said first wall of said second channel mates with said first wall of said first channel to mechanically interlock said end regions together;
• and fusing the overlapped end regions togther to form a fused seam.

A process for fabricating a flexible belt comprising, providing a flexible sheet having a substantially rectangular shape, said sheet having a first major exterior surface opposite and parallel to a second major exterior surface and a first edge surface of a first marginal end region of said sheet opposite to and parallel with a second edge surface of a second marginal end region;

• removing by ablaton with a masked excimer laser beam a first segment of material from said first major exterior surface at said first marginal end region to form at least one recess comprising at least one fresh substantially flat surface intersecting at least one adjacent wall at a right angle, said flat surface being substantially parallel to and spaced from said second major exterior surface;
• removing by ablation with a masked excimer laser beam a second segment of material from said second major exterior surface at said second marginal end region to form at least one recess comprising at least one fresh substantially flat surface intersecting at least one adjacent wall at a right angle, said flat surface at said second marginal end being substantially parallel to and spaced from said first major exterior surface;
• overlapping said first marginal end region over said second marginal end region whereby said fresh substantially flat surface at said first marginal end region mates with said fresh substantially flat surface at said second marginal end region;
• and fusing the overlapped end regions together to form a fused seam, said flat surface being substantially parallel to said second major exterior surface is the floor of a first channel, said first channel being substantially parallel to and spaced from said first edge surface of said first marginal end region by a first ribbon shaped zone on said first major exterior surface, said first channel having a first wall, a second wall and a floor, said first wall being substantially perpendicular to said first major exterior surface and closer to said first edge of said first marginal end region than said second wall;
• said first ribbon shaped zone comprises a first plateau having a substantially flat surface parallel to said second major surface, said first wall of said first channel having a height, relative to said floor of said first channel, less than the height of said second wall of said first channel;
• and said flat surface parallel to said first major exterior surface is the top of a second plateau, said second plateau separating a second channel from said second edge of said second marginal end region, said second channel having a first wall, a second wall and a floor, said first wall of said second channel being substantially perpendicular to said second major exterior surface and closer to said second edge of said second marginal end region than said second wall of said second channel, said first wall of said second channel having a height, relative to said floor of said second channel, less than the height of said second wall of said second channel, and said second channel and said second plateau being a reverse mirror image of said first channel and said first plateau, respectively;
• overlapping said first marginal end region over said second marginal end region whereby said flat surface of said first plateau mates with said floor of said second channel, said flat surface of said second plateau mates with said floor of said first channel, said second wall of said first channel mates with said second edge surface, said second wall of said second channel mates with said first edge surface, and said first wall of said second channel mates with said first wall of said first channel to mechanically interlock said end regions together prior to said fusing of the overlapped end regions together to form said fused seam.