Patents by Inventor David F. Slama
David F. Slama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7048527Abstract: 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 30% 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.Type: GrantFiled: December 10, 2004Date of Patent: May 23, 2006Assignee: 3M Innovative Properties CompanyInventors: Randy S. Bay, Cristina U. Thomas, David F. Slama, Richard T. Paxton, Gary L. Curtis, Jonathan J. Mattson
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Patent number: 7044834Abstract: An abrasive sheet member is disclosed, including a substrate having first and second major surfaces, an abrasive on the first major surface, and a plurality of hooking stems on the second major surface. The hooking stems are adapted to hook engaging structures on an opposed surface to releasably affix the abrasive sheet member to the surface.Type: GrantFiled: April 20, 2005Date of Patent: May 16, 2006Assignee: 3M Innovative Properties CompanyInventors: Jason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
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Patent number: 6884157Abstract: An abrasive sheet member is disclosed, including a substrate having first and second major surfaces, an abrasive on the first major surface, and a plurality of hooking stems on the second major surface. The hooking stems are adapted to hook engaging structures on an opposed surface to releasably affix the abrasive sheet member to the surface.Type: GrantFiled: March 25, 2003Date of Patent: April 26, 2005Assignee: 3M Innovative Properties CompanyInventors: Jason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
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Patent number: 6843944Abstract: A method for capping a stem web including passing the stem web through a first nip against a first heated nip roll so as to partially cap the stems; cooling the web; and passing the stem web through a second nip against a second heated nip roll to completely cap the stems to a diameter āDā. In preferred embodiments the two nips are on opposite sides of a larger central cooled roll positioned between the heated rolls. Preferably, the reaction forces between the rolls are measured and controlled at each end of each other 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.Type: GrantFiled: November 1, 2001Date of Patent: January 18, 2005Assignee: 3M Innovative Properties CompanyInventors: Randy S. Bay, Cristina U. Thomas, David F. Slama, Richard T. Paxton, Gary L. Curtis, Jonathan J. Mattson
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Patent number: 6755878Abstract: Abrasive articles have an adhesive layer in contact with a liner having protrusions that contact the adhesive layer.Type: GrantFiled: August 2, 2002Date of Patent: June 29, 2004Assignee: 3M Innovative Properties CompanyInventors: Richard T. Paxton, David F. Slama, Mark A. Swanson, Robert A. Follensbee
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Publication number: 20040020133Abstract: Abrasive articles have an adhesive layer in contact with a liner having protrusions that contact the adhesive layer.Type: ApplicationFiled: August 2, 2002Publication date: February 5, 2004Applicant: 3M Innovative Properties CompanyInventors: Richard T. Paxton, David F. Slama, Mark A. Swanson, Robert A. Follensbee
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Publication number: 20030159363Abstract: An abrasive sheet member is disclosed, including a substrate having first and second major surfaces, an abrasive on the first major surface, and a plurality of hooking stems on the second major surface. The hooking stems are adapted to hook engaging structures on an opposed surface to releasably affix the abrasive sheet member to the surface.Type: ApplicationFiled: March 25, 2003Publication date: August 28, 2003Applicant: 3M Innovative Properties CompanyInventors: Jason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
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Patent number: 6579162Abstract: An abrasive sheet member is disclosed, including a substrate having first and second major surfaces, an abrasive on the first major surface, and a plurality of hooking stems on the second major surface. The hooking stems are adapted to hook engaging structures on an opposed surface to releasably affix the abrasive sheet member to the surface.Type: GrantFiled: December 15, 2000Date of Patent: June 17, 2003Assignee: 3M Innovative Properties CompanyInventors: Jason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
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Patent number: 6579161Abstract: An abrasive sheet member is disclosed, including a substrate having first and second major surfaces, an abrasive on the first major surface, and a plurality of hooking stems on the second major surface. The hooking stems are adapted to hook engaging structures on an opposed surface to releasably affix the abrasive sheet member to the surface.Type: GrantFiled: December 6, 1996Date of Patent: June 17, 2003Assignee: 3M Innovative Properties CompanyInventors: Jason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
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Publication number: 20030080453Abstract: A method for capping a stem web including passing the stem web through a first nip against a first heated nip roll so as to partially cap the stems; cooling the web; and passing the stem web through a second nip against a second heated nip roll to completely cap the stems to a diameter “D”. In preferred embodiments the two nips are on opposite sides of a larger central cooled roll positioned between the heated rolls. Preferably, the reaction forces between the rolls are measured and controlled at each end of each other 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.Type: ApplicationFiled: November 1, 2001Publication date: May 1, 2003Applicant: 3M Innovative Properties CompanyInventors: Randy S. Bay, Cristina U. Thomas, David F. Slama, Richard T. Paxton, Gary L. Curtis, Jonathan J. Mattson
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Patent number: 6393805Abstract: A container for a stack of sheets (e.g., abrasive coated discs) including a base portion adapted to extend transversely across a bottom surface of the stack of sheets and having opposite ends adapted to be positioned at spaced locations along a side surface of the stack of sheets; and a plurality of stiff elongate retaining portions having proximal portions attached to the base portion at its opposite ends with the retaining portions at spaced locations around the side surface of the stack of sheets. The retaining portions have central parts adapted to extend along the side surface of the stack of sheets from its bottom surface to its top surface at those spaced locations, and have distal parts adapted to extend above the top surface of the stack of sheets.Type: GrantFiled: June 25, 2001Date of Patent: May 28, 2002Assignee: 3M Innovative Properties CompanyInventors: Michael Sean Bates, Donna C. Rockette, David C. Roeker, David F. Slama
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Patent number: 6321910Abstract: A container for a stack of sheets (e.g., abrasive coated discs) including a base portion adapted to extend transversely across a bottom surface of the stack of sheets and having opposite ends adapted to be positioned at spaced locations along a side surface of the stack of sheets; and a plurality of stiff elongate retaining portions having proximal portions attached to the base portion at its opposite ends with the retaining portions at spaced locations around the side surface of the stack of sheets. The retaining portions have central parts adapted to extend along the side surface of the stack of sheets from its bottom surface to its top surface at those spaced locations, and have distal parts adapted to extend above the top surface of the stack of sheets.Type: GrantFiled: July 20, 1999Date of Patent: November 27, 2001Assignee: 3M Innovative Properties CompanyInventors: Michael Sean Bates, Donna C. Rockette, David C. Roeker, David F. Slama
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Publication number: 20010037625Abstract: A container for a stack of sheets (e.g., abrasive coated discs) including a base portion adapted to extend transversely across a bottom surface of the stack of sheets and having opposite ends adapted to be positioned at spaced locations along a side surface of the stack of sheets; and a plurality of stiff elongate retaining portions having proximal portions attached to the base portion at its opposite ends with the retaining portions at spaced locations around the side surface of the stack of sheets. The retaining portions have central parts adapted to extend along the side surface of the stack of sheets from its bottom surface to its top surface at those spaced locations, and have distal parts adapted to extend above the top surface of the stack of sheets.Type: ApplicationFiled: June 25, 2001Publication date: November 8, 2001Applicant: 3M Innovative Properties CompanyInventors: Michael Sean Bates, Donna C. Rockette, David C. Roeker, David F. Slama
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Publication number: 20010001088Abstract: An abrasive sheet member is disclosed, including a substrate having first and second major surfaces, an abrasive on the first major surface, and a plurality of hooking stems on the second major surface. The hooking stems are adapted to hook engaging structures on an opposed surface to releasably affix the abrasive sheet member to the surface.Type: ApplicationFiled: December 15, 2000Publication date: May 10, 2001Applicant: 3M Innovative Properties CompanyInventors: Jason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
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Patent number: 5962102Abstract: A back-up pad for supporting an abrasive article having projecting hooking stems. The back-up pad includes a support member and an engaging means provided on a major surface of the support member for releasable engaging the hooking stems of the abrasive article. The engaging means includes a substrate having a first surface, a second surface, a plurality of loops projecting from the first surface, and an adhesive applied to the second surface. The plurality of loops comprise a continuous strand, the strand including a plurality of loop portions projecting through the substrate from the second side to the first side to thereby form the loops, and a plurality of connecting portions between the loop portions. The substrate is located between the loop portions and connection portions of the strand, and the adhesive adheres the connecting portions of the strand to the second surface of the substrate. Also disclosed is an engaging means for use with a back-up pad, and a method of stitching the engaging means.Type: GrantFiled: November 26, 1997Date of Patent: October 5, 1999Assignee: 3M Innovative Properties CompanyInventors: William F. Sheffield, John L. Barry, David F. Slama
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Patent number: 5840089Abstract: A method for making an abrasive article is disclosed, including the steps of providing a substrate having abrasive means on one surface, and providing a plurality of hooking stems on the opposite surface thereof. Several illustrative variations of the inventive method are disclosed.Type: GrantFiled: July 29, 1997Date of Patent: November 24, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Jason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
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Patent number: 5725423Abstract: A back-up pad is provided for supporting an abrasive article during abrading. The back-up pad includes a support portion, such as a polymeric backing, and an engaging portion, such as a loop material, for engaging hooking stems projecting from the abrasive article.Type: GrantFiled: March 3, 1997Date of Patent: March 10, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: John L. Barry, Donald R. Bell, Jason A. Chesley, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
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Patent number: 5692949Abstract: A back-up pad for supporting an abrasive article having projecting hooking stems. The back-up pad includes a support member and an engaging means provided on a major surface of the support member for releasably engaging the hooking stems of the abrasive article. The engaging means includes a substrate having a first surface, a second surface, a plurality of loops projecting from the first surface, and an adhesive applied to the second surface. The plurality of loops comprise a continuous strand, the strand including a plurality of loop portions projecting through the substrate from the second side to the first side to thereby form the loops, and a plurality of connecting portions between the loop portions. The substrate is located between the loop portions and connection portions of the strand, and the adhesive adheres the connecting portions of the strand to the second surface of the substrate. Also disclosed is an engaging means for use with a back-up pad, and a method of stitching the engaging means.Type: GrantFiled: November 17, 1995Date of Patent: December 2, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: William F. Sheffield, John L. Barry, David F. Slama
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Patent number: 5672186Abstract: A method for making an abrasive article is disclosed, including the steps of providing a substrate having abrasive means on one surface, and providing a plurality of hooking stems on the opposite surface thereof. Several illustrative variations of the inventive method are disclosed.Type: GrantFiled: March 13, 1996Date of Patent: September 30, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Jason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
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Patent number: 5667540Abstract: A method for making an abrasive article is disclosed, including the steps of providing a substrate having abrasive means on one surface, and providing a plurality of hooking stems on the opposite surface thereof. Several illustrative variations of the inventive method are disclosed.Type: GrantFiled: March 13, 1996Date of Patent: September 16, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Jason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens