Manufacturing a two-sided product with an integrated device including microscale structures

An inline apparatus for manufacturing a two-sided product with an integrated device on a web of material, including:

• a first rotary microscale structure formation unit having a first structure configured to form a first microscale structure on one side of a portion of web;
• a second rotary microscale structure formation unit having a second structure configured to form a second microscale structure on a second side of the portion of the web, the first and second microscale structures and the portion of the web between the first and second microscale structures together forming the integrated device, wherein the second structure includes an image area and a non-image area, wherein one or more ink-housing recesses are formed in the non-image area and ink housing recesses are omitted from the image area, such that the second rotary microscale structure formation unit acts to print a negative or reverse image;
• and
• a web feed system for feeding the web of material between the first and second rotary microscale structure formation units,
• wherein the second rotary microscale structure formation unit includes a second roller, the second structure being formed in a surface of the second roller, or the second roller has a second shim mounted thereto, and the second structure being formed into a surface of the second shim, and
• the second rotary microscale structure formation unit comprises a second ink application unit having a plurality of patches of radiation curable ink disposed on a surface of the second ink application unit and configured to apply the plurality of patches of the radiation curable ink to the second structure such that the radiation curable ink is disposed in the one or more ink-housing recesses.