Patents by Inventor Stephen W. Mohn

Stephen W. Mohn 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).

  • Method of making retroreflective sheeting and slot die apparatus
    Patent number: 7410604
    Abstract: The invention relates to a method of making retroreflective sheeting and other articles prepared from casting a fluid synthetic resin onto a tool having a microstructured surface with a slot die apparatus. The invention further relates to a slot die apparatus.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: August 12, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Stanley C. Erickson, James C. Breister, Gregory H. Van Erem, David W. Meitz, Stephen W. Mohn, Paul DeRoussel
  • Method of making retroreflective sheeting and slot die apparatus
    Patent number: 7364421
    Abstract: The invention relates to a method of making retroreflective sheeting and other articles prepared from casting a fluid synthetic resin onto a tool having a microstructured surface with a slot die apparatus. The invention further relates to a slot die apparatus.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: April 29, 2008
    Assignee: 3M Innovative Properties Comapny
    Inventors: Stanley C. Erickson, James C. Breister, Gregory H. Van Erem, David W. Meitz, Stephen W. Mohn, Paul DeRoussel
  • Method of making retroreflective sheeting and slot die apparatus
    Publication number: 20040173920
    Abstract: The invention relates to a method of making retroreflective sheeting and other articles prepared from casting a fluid synthetic resin onto a tool having a microstructured surface with a slot die apparatus. The invention further relates to a slot die apparatus.
    Type: Application
    Filed: March 6, 2003
    Publication date: September 9, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Stanley C. Erickson, James C. Breister, Gregory H. Van Erem, David W. Meitz, Stephen W. Mohn, Paul DeRoussel
  • Integrated retroreflective electronic display
    Patent number: 5621571
    Abstract: An integrated retroreflective data communication display for visual and electromagnetic communication is described. The display may be configured as an integrated retroreflective electronic license plate, with printed visual information, similar to the information printed on traditional license plates, on retroreflective sheeting. An antenna network is integrated within the license plate for electromagnetic communication and may be connected to external electronic modules. The display may also be configured as an integrated retroreflective electronic road sign, also providing visual and electromagnetic information in a unitary structure.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: April 15, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Heinrich Bantli, Thomas I. Bradshaw, Stephen W. Mohn, Edmund J. Ring
  • Coating die with slot thickness control
    Patent number: 5587184
    Abstract: An easily controllable method to adjust the die slot exit gap to produce an accurately controlled flow from the slot exit across the width of a die provides movable back seats at the back of the die that cause the front and back portions of the die plates to move simultaneously to produce a change in the die slot exit gap. At least one actuator is located between the front and back seats of the die to increase or reduce its length to bend the first plate around the front seat thereby to increase or decrease the first exit gap.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: December 24, 1996
    Assignee: Minnesota Mining and Manufacturing
    Inventors: William K. Leonard, Stephen W. Mohn, Timothy J. Edman, Phillip D. Schiller
  • Method of thickness control for dies
    Patent number: 5464577
    Abstract: An easily controllable method to adjust a die slot exit gap to produce an accurately controlled flow from the slot exit across the width of a die provides movable back seats at the back of the die that cause front and back portions of die plates to move simultaneously to produce a change in the die slot exit gap. At least one actuator is located between the front and back seats of the die to increase or reduce the actuator length to bend the first plate around the front seat thereby to increase or decrease the first exit gap.
    Type: Grant
    Filed: January 4, 1994
    Date of Patent: November 7, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William K. Leonard, Stephen W. Mohn, Timothy J. Edman, Philip D. Schiller
  • Roll gap controller for regulating coating thickness
    Patent number: 5409732
    Abstract: A method for regulating the thickness of an applied coating. The method includes passing a web through two members which define a gap between them. A sensor measures periodic variations in the thickness of the coating on the web. An automatic controller analyzes information from the sensor and converts the information into gap adjusting signals. Piezoelectric or magnetostrictive translators adjust the size of the gap to compensate for repeating variations in coating thickness.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: April 25, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William K. Leonard, Stephen W. Mohn, P. Daniel Schiller