Abstract: A radially expandable device particularly adaptable for use as an endoprothesis is described along with a method of fabrication. The method begins by obtaining a number of individual, separate generally circular hoops by a number of ways, such as cutting a length of wire, forming it into a generally circular loop, and attaching the ends together. In another aspect of this method of fabrication, the individual, separate generally circular hoops are obtained by cutting the needed number from a tubing. Thereafter, a wave-like pattern is formed in each hoop, with a die, in a direction transverse the axis of the wire, creating a predetermined number of rings and attaching them at the crest point to form a stent that can be compressed for inserting into a lumen where it can be expanded to provided a needed support.

Abstract: An apparatus and method of using same for exposing successive sections of opposite sides of a web of material to actinic radiation in patterns on each section of the opposite sides of the web is provided. The apparatus includes a first station having mechanisms to locate and expose selected sections on the first side of the web to actinic radiation in a first patterns, and a second station spaced from the first station having mechanisms to locate and expose selected sections on the second side of said web to actinic radiation. The first and second stations include first and second pattern masters and first and second mountings for the masters, and first and second sources of actinic radiation to project the desired patterns of exposure from each of the masters to each of the sections on the first and second sides of the web in very close registration or alignment thereof.

Abstract: An apparatus and method of using same for exposing successive sections of opposite sides of a web of material to actinic radiation in patterns on each section of the opposite sides of the web is provided. The apparatus includes a first station having mechanisms to locate and expose selected sections on the first side of the web to actinic radiation in a first pattern, and a second station spaced from the first station having mechanisms to locate and expose selected sections on the second side of said web to actinic radiation. The first and second stations include first and second pattern masters and first and second mountings for the masters, and first and second sources of actinic radiation to project the desired patterns of exposure from each of the masters to each of the sections on the first and second sides of the web in very close registration or alignment thereof.

Abstract: A radially expandable device particularly adaptable for use as an endoprothesis is described along with a method of fabrication. The method begins by obtaining a number of individual, separate generally circular hoops by a number of ways, such as cutting a length of wire, forming it into a generally circular loop, and attaching the ends together. In another aspect of this method of fabrication, the individual, separate generally circular hoops are obtained by cutting the needed number from a tubing. Thereafter, a wave-like pattern is formed in each hoop, with a die, in a direction transverse the axis of the wire, creating a predetermined number of rings and attaching them at the crest point to form a stent that can be compressed for inserting into a lumen where it can be expanded to provided a needed support.