Patent ID: 11873149
Assignee: SOFRESH, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 27:
28. A method for manufacturing the film of claim 27, comprising:
combining a molten transmission polymer and an additional molten transmission polymer having a lower melt point;
co-extruding the molten transmission polymer and the additional molten transmission polymer from the feedblock through an annular die to form a multi-layered extruded melt, wherein:
the molten transmission polymer is extruded as an outer transmission sublayer, and
the additional molten transmission polymer having the lower melt point is extruded as an inner transmission sublayer,

injecting an inert gas through a hole in the center of the annular die to cause the multi-layered extruded melt to expand into a bubble,
pulling the bubble continuously from the annular die;
dispensing at least one active agent in the interior of the bubble using an atomizer,
collapsing the bubble by pulling the bubble between a pair of nip rollers, wherein the bubble self-adheres to form the film.