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:
Feb. 16, 1982
Filed:
Sep. 22, 1980
Larry A Bettenhausen, Stillwater, MN (US);
Minnesota Mining & Manufacturing Company, St. Paul, MN (US);
Abstract
A mandrel which, when inserted into the inner cylindrical surface of a tape roll core, permits the core to be rotatably mounted in a dispenser. The mandrel has two generally triangular opposed end plates connected at corresponding corners by three arcuate plates. Each end plate has a cylindrical stub shaft extending outward perpendicularly to define the axis of the mandrel. The arcuate plates are spaced to define segments of a cylinder coaxial with the axis of the mandrel. Each arcuate plate has a rib extending axially along its convex surface; when the mandrel is inserted into a tape roll core, these ribs engage the inner cylindrical surface of the core. A mandrel of this structure is particularly suited for manufacture by an injection molding process.