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US 7,065,948 B2Granted
Web twister removal process
AssigneeThe Procter & Gamble Company
InventorsMartin Kranich, Oliver Lenz
Life of this patent
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Abstract
An apparatus for detecting and eliminating a twister in a running web of flexible material. The apparatus includes a catch section for twisters, a rotor, a scanner arrangement for detection of a twister that has entered a catch section and a control unit , which, upon detection of a twister by the scanner, triggers the drive of the rotor for untwisting the twister.
Claims9
An apparatus for detecting and eliminating a twister in a running web of flexible material in the manufacture of sanitary articles, comprising
- a catch section for twisters, which extends between a web guide gap on the inlet side and a web guide gap on the outlet side;
- a rotor, which is controlled in rotation about an axis parallel to the web running direction and which houses the web guide gap on the inlet side;
- a scanner and detection arrangement for detecting a twister that has entered the catch section;
- and
- a control unit, which, upon detection of a twister by the scanner arrangement, triggers the drive of the rotor for rotation of the web guide gap on the inlet side and thus for untwisting the twister, wherein the scanner and detection arrangement is an optical scanner arrangement comprising at least two scanners which determines any twisting of the web out of the normal plane of running.
2 more elements
Dependencies are inferred from the claim text.