US 12,421,070 B2
Measurement device and method for detecting local thickenings in a film web
Alexander Paulus, Leverkusen (DE); Klaus Meyer, Dormagen (DE); Joerg Nickel, Dormagen (DE); and Jan Holtermann, Neuss-Grefrath (DE)
Assigned to Covestro Deutschland AG, Leverkusen (DE)
Appl. No. 17/778,903
Filed by Covestro Intellectual Property GmbH & Co. KG, Leverkusen (DE)
PCT Filed Dec. 7, 2020, PCT No. PCT/EP2020/084835
§ 371(c)(1), (2) Date May 23, 2022,
PCT Pub. No. WO2021/116001, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 19215539 (EP), filed on Dec. 12, 2019.
Prior Publication US 2022/0412724 A1, Dec. 29, 2022
Int. Cl. B65H 26/02 (2006.01); B29C 48/00 (2019.01); B29C 48/21 (2019.01); B29C 48/355 (2019.01); B29C 48/92 (2019.01)
CPC B65H 26/02 (2013.01) [B29C 48/0022 (2019.02); B29C 48/21 (2019.02); B29C 48/355 (2019.02); B29C 48/92 (2019.02); B29C 2948/92152 (2019.02); B29C 2948/92647 (2019.02); B65H 2511/13 (2013.01); B65H 2511/16 (2013.01); B65H 2511/166 (2013.01); B65H 2511/52 (2013.01); B65H 2701/1752 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A measurement device for detecting local thickenings in a film web (20) comprising at least one of an extruded film and a co-extruded film, having
a first roll (14) for rolling on the film web (20) configured to be moved along continuously,
a second roll (18) that can be supported indirectly above the film web (20) on the first roll (14) for rolling on the film web (20) configured to be moved along continuously,
wherein the second roll (18) is resiliently guided in the thickness direction of the film web (20) configured to be moved along continuously in the vertical direction,
wherein at least one distance sensor (24), fixed in position relative to at least one of the first roll (14) and the film web (20) configured to be moved along continuously for detecting a distance of the second roll (18) during continuous movement of the film web,
wherein the first roll (14) is rotatably mounted in a first frame part (12),
wherein the second roll (18) is rotatably mounted and guided linearly in a second frame part (16),
wherein the second frame part (16) is coupled to the first frame part (12) configured to be pivoted between a closed position and an open position for maintenance access to the continuously moving film web, and
wherein, the second frame part (16) is configured to be locked against movement with the first frame part (12) when in the closed position to maintain stable measurement conditions during continuous film web movement.