Web guiding roller and web conveying apparatus

Advancing material of indeterminate length – By orbitally traveling material-engaging surface – Including details of roll or mount

Reexamination Certificate

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Details

C226S196100, C226S190000, C242S615400

Reexamination Certificate

active

07735702

ABSTRACT:
A web conveying apparatus is provided with a plurality of web guiding rollers. The web guiding rollers convey a web on which a functional material has just been coated in a coating section. Concave portions and convex portions that have a substantially semicircular cross section are alternately formed on a peripheral surface along a circumferential direction of each roller. A pitch Pvof the concave portions and a pitch Pmof the convex portions are in the range of 0.01 mm or more and 2 mm or less. A height Hv-mfrom a lowest point of the concave portion to a highest point of the convex portion is in the range of 0.01 mm or more and 1 mm or less. A curvature radius Rvof the concave portion and a curvature radius Rmof the convex portion are in the range of 0.1 mm or more and 0.5 mm or less.

REFERENCES:
patent: 4720714 (1988-01-01), Yukio
patent: 5593140 (1997-01-01), van Beers
patent: 5819835 (1998-10-01), Broome
patent: 6058844 (2000-05-01), Niemiec
patent: 6427941 (2002-08-01), Hikita
patent: 6635111 (2003-10-01), Holtmann et al.
patent: 08175727 (1996-07-01), None
patent: 10077146 (1998-03-01), None
patent: 2003146505 (2003-05-01), None

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