Locating flat spots on rubber wipe rolls

Details Locating flat spots on rubber wipe rolls Locating flat spots on rubber wipe rolls

1990-08-20

1991-06-18

Raevis, Robert

Measuring and testing

Surface and cutting edge testing

G01N 1908

Patent

active

050240811

ABSTRACT:
A method of testing a resiliently covered roll for surface flat spots involves rotating the roll and applying a film of water with a sponge roller to at least a portion of the length of the rotating roll surface. Then doctoring the rotating surface with a blade to remove the film, and detecting any flat spot by observing any puddle of water remaining after the doctoring. A testing device preferably is handheld and comprises a forwardly extending doctor blade below which is rotatably mounted the sponge roller. A rubber wipe roll for flexographic printing can be so advantageously tested for flat spots before installation.

REFERENCES:
patent: 2240278 (1941-04-01), Abbott
patent: 3194061 (1965-07-01), Sorenson et al.
patent: 4858465 (1989-08-01), Molina

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