The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 1996
Filed:
Aug. 18, 1994
Kevin J Doyle, Woodbury, MN (US);
Gary N Eastlund, Woodbury, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A locking device to be used with a rotating mandrel to lock the core of a roll of material that is to be wound or unwound into engagement with the mandrel. The mandrel has a cylindrical exterior surface, a rotatable cantilever support at an inward end, and an outward unsupported end adapted to receive the core of the roll of material. The locking device comprises a locking hub for compressively engaging and locking the core. The locking hub includes at least one pin fixedly coupled to an interior cylindrical surface as well as an engaging surface directed toward the inward end of the mandrel to engage the end of the core. The locking device further includes a sleeve mounted on the mandrel and having structure defining a groove or grooves formed in a generally spiral shape for lockingly engaging the at least one pin. Alternatively, the grooves are formed in the cylindrical exterior surface of the mandrel proximate the unsupported end thereof, obviating the need for the sleeve.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile