公开(公告)号：US12123700B2

公开(公告)日：2024-10-22

申请号：US17765873

申请日：2020-09-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Thomas J. Strey ,  David L. Hofeldt ,  Gregory J. McGill ,  Jay M. Krieger ,  Christopher J. Rother ,  Paul C. Thomas

IPC: G01B11/06 ,  B29C48/10 ,  B29C48/92 ,  B29C48/88 ,  B29C48/885

CPC classification number: G01B11/06 ,  B29C48/10 ,  B29C48/92 ,  B29C48/885 ,  B29C48/913 ,  B29C2948/92152 ,  B29C2948/92428 ,  B29C2948/92647

Abstract: Methods and systems of measurement for blown film lines are provided. The sensing system includes a terahertz (THz) sensor positioned adjacent to a film bubble extruded from a blown film die, and a sensor support configured to guide the THz sensor around the circumference of the film bubble to measure its film thickness.

公开(公告)号：US20220412723A1

公开(公告)日：2022-12-29

申请号：US17765873

申请日：2020-09-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Thomas J. Strey ,  David L. Hofeldt ,  Gregory J. McGill ,  Jay M. Krieger ,  Christopher J. Rother ,  Paul C. Thomas

IPC: G01B11/06

Abstract: Methods and systems of measurement for blown film lines are provided. The sensing system includes a terahertz (THz) sensor positioned adjacent to a film bubble extruded from a blown film die, and a sensor support configured to guide the THz sensor around the circumference of the film bubble to measure its film thickness.