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:
May. 23, 2006
Filed:
Dec. 10, 2004
Randy S. Bay, Woodbury, MN (US);
Cristina U. Thomas, Woodbury, MN (US);
David F. Slama, Vadnais Heights, MN (US);
Richard T. Paxton, Ames, IA (US);
Gary L. Curtis, River Falls, WI (US);
Jonathan J. Mattson, Stillwater, MN (US);
Randy S. Bay, Woodbury, MN (US);
Cristina U. Thomas, Woodbury, MN (US);
David F. Slama, Vadnais Heights, MN (US);
Richard T. Paxton, Ames, IA (US);
Gary L. Curtis, River Falls, WI (US);
Jonathan J. Mattson, Stillwater, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An apparatus for capping a stem web including a cooled roll, a first heated nip roll positioned to form a first nip with the cooled roll, and a second heated nip roll positioned to form a second nip with the cooled roll. The cooled roll has a diameter that is at least% larger than a diameter of the first or second heated nip roll. In an embodiment, the two nips are on opposite sides of a larger central cooled roll positioned between the heated rolls. In an embodiment, the reaction forces between the rolls are measured and controlled at each end of each of the heated rolls. The invention is particularly adapted to making abrasive particles that are attached to a driving mechanism via headed stem fasteners formed by the method.