Thomas Edward Pahl

US Patent:

20120231707, Sep 13, 2012

Filed:

Mar 6, 2012

Appl. No.:

13/412924

Inventors:

Thomas E. Pahl - Ames IA, US
John G. Petersen - Center City MN, US
Michael P. Wald - Ankeny IA, US

International Classification:

B24D 11/00
B24B 1/00
B24D 18/00

US Classification:

451 59, 51298, 51295

Abstract:

The present invention provides an abrasive article, e.g. a sheet of sandpaper, comprising a backing layer having opposed first and second major surfaces, an adhesive make coat on the second major surface, abrasive particles at least partially embedded in the make coat, thereby defining an abrasive surface, and an exposed non-slip coating layer on the first major surface, the non-slip coating layer comprising at least a base resin and a tackifying resin.

US Patent:

20120231708, Sep 13, 2012

Filed:

Mar 6, 2012

Appl. No.:

13/412955

Inventors:

Thomas E. Pahl - Ames IA, US
John G. Petersen - Center City MN, US
Michael P. Wald - Ankeny IA, US

International Classification:

B24D 11/02
B24B 1/00
B05D 1/36

US Classification:

451 59, 427203, 451539

Abstract:

A sheet of coarse sandpaper includes a backing layer having opposed first and second major surfaces, an adhesive make coat on the second major surface, coarse abrasive particles at least partially embedded in the make coat, thereby defining a coarse abrasive surface, and an exposed non-slip coating layer on the first major surface. Methods of making and using such coarse sandpaper are also provided.

US Patent:

20210017425, Jan 21, 2021

Filed:

Mar 27, 2019

Appl. No.:

17/042758

Inventors:

- St. Paul MN, US
Thomas E. Pahl - Cottage Grove MN, US

International Classification:

C09J 7/24
C09J 7/38
B29C 59/04

Abstract:

A method for imparting hand-tearability to an organic polymeric film by impinging a multiplicity of ceramic microblades on a major surface of the organic polymeric film. The resulting microfractured organic polymeric film can be used as a hand-tearable tape backing for a hand-tearable adhesive tape.

US Patent:

20200164610, May 28, 2020

Filed:

May 4, 2018

Appl. No.:

16/611349

Inventors:

- St. Paul MN, US
Paul D. Graham - Woodbury MN, US
James J. Kobe - Newport MN, US
Thomas B. Galush - Roseville MN, US
Graham M. Clarke - Woodbury MN, US
Thomas E. Pahl - Cottage Grove MN, US
Charles R. Wald - Oakdale MN, US
Brian W. Lueck - Houlton WI, US
John G. Petersen - Center City MN, US

International Classification:

B32B 3/30
B32B 5/06
B32B 27/40
B32B 27/12
B32B 37/24
A41D 19/015

Abstract:

Various embodiments disclosed relate to an article. The article includes a first layer defining a first major surface of the article. The first layer includes a plurality of protrusions extending outwardly from the first major surface. The protrusions comprise an elastic polymer component. The article further includes a second layer opposite the first layer, which at least partially defines a second major surface of the article. The first layer is disposed over a range of about 5% surface area of the second layer to about 99% surface area of the second layer. The first layer and the second layer are in direct contact.

US Patent:

20200070314, Mar 5, 2020

Filed:

May 4, 2018

Appl. No.:

16/611340

Inventors:

- St. Paul MN, US
Douglas A. Davis - Cottage Grove MN, US
Thomas E. Pahl - Cottage Grove MN, US
John G. Petersen - Center City MN, US
Graham M. Clarke - Woodbury MN, US
James J. Kobe - Newport MN, US
Thomas B. Galush - Roseville MN, US
Charles R. Wald - Oakdale MN, US
Brian W. Lueck - Houlton WI, US

International Classification:

B24D 11/00
B24D 11/02
B32B 27/08
B32B 3/18
B29C 59/04

Abstract:

Various embodiments disclosed relate to an abrasive sheet. The abrasive sheet includes a first layer including an abrasive major surface and an opposite second layer defining a second major surface. The second major surface includes a plurality of protrusions extending outwardly from the second major surface. The protrusions include a first polymer component having at least one of a Shore A hardness ranging from about 5 to about 100 and a Shore D hardness ranging from about 1 to about 70. The first layer and the second layer are directly joined to each other.

US Patent:

20170304996, Oct 26, 2017

Filed:

Nov 20, 2015

Appl. No.:

15/518280

Inventors:

- St. Paul MN, US
Douglas A. Davis - Cottage Grove MN, US
Yugeun P. Yang - St. Paul MN, US
Thomas E. Pahl - Ames IA, US
James J. Kobe - Newport MN, US
Christopher J. Lee - Woodbury MN, US
Thomas B. Galush - Roseville MN, US
John G. Petersen - Center City MN, US

International Classification:

B24D 11/02
B32B 27/08
B24D 11/00

Abstract:

An abrasive article is provided that has a backing having opposed first and second major surfaces, an abrasive layer disposed on the first major surface, and a plurality of protrusions extending outwardly from the second major surface. The protrusions comprise a polymer having a Shore A hardness ranging from 5 to 90. These articles provide an alternative sanding solution enabling abrasive articles lacking an attachment layer to be handled effectively and efficiently, providing for a technically superior abrasive sheet on the marketplace that does not use or require an attachment layer.

US Patent:

20170043450, Feb 16, 2017

Filed:

Apr 23, 2015

Appl. No.:

15/023709

Inventors:

- St. Paul MN, US
Yugeun P. Yang - St. Paul MN, US
Douglas A. Davis - Cottage Grove MN, US
Thomas E. Pahl - Ames IA, US
John G. Petersen - Center City MN, US

International Classification:

B24D 3/28
B24D 11/02
B24D 3/00

Abstract:

A flexible abrasive article includes a unitary backing having first and second opposed major surfaces and comprising a polyurethane. In some embodiments, the backing has an average thickness of from 4 to 6 mils (102 to 152 microns), a tensile strength of 500 to 3200 psi (3.45 to 22.1 MPa), and an ultimate elongation of 230 to 530 percent. In some embodiments, the flexible abrasive article has a tensile strength of 400 to 2400 psi (2.8 to 16.5 MPa), and a ultimate elongation of 180 to 380 percent. An abrasive layer is disposed on and secured to the unitary backing.