Patents by Inventor Donald L. Pochardt

Donald L. Pochardt 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).

  • Patent number: 9511525
    Abstract: Injection molding parts onto a carrier web located between mold halves, each mold half having a cavity, resulting in molded articles having parts on both sides of the carrier web. Polymer flow into the cavities is assisted by application of ultrasonic energy to the mold. After the molding operation, mold halves are separated, and the carrier web is advanced, or indexed, to a next position for another molding sequence. Articles produced include lenses with part of the carrier web between lens halves, and a carrier web bearing an array of molded parts.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: December 6, 2016
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Peter T. Benson, Stanley Rendon, Donald L. Pochardt, James N. Dobbs
  • Patent number: 9289931
    Abstract: An ultrasonic-assisted injection molding system and method for making precisely-shaped articles. A source of ultrasonic energy is positioned to apply vibrational energy to a mold cavity connected to at least one gate in flow communication with a source of molten (co)polymer. The mold is heated to a temperature of 104-116° C., and the molten (co)polymer is injected into the mold cavity. After cooling the mold until the molten (co)polymer within the gate has solidified, ultrasonic energy is applied to the mold without remelting the solidified (co)polymer within the gate until the temperature increases to 116-122° C., thereby substantially relieving flow induced stresses. The mold is then cooled until the temperature decreases to 101-107° C., and is thereafter heated until the temperature increases to 116-122° C., thereby substantially relieving any thermally induced stresses. The mold is cooled until the molten (co)polymer has solidified, thereby forming a precision molded plastic optical element.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: March 22, 2016
    Assignee: 3M Innovative Properties Company
    Inventors: Stanley Rendon, Dennis E. Ferguson, Donald L. Pochardt, Joseph S. Warner, Timothy J. Rowell, Peter T. Benson, Satinder K. Nayar
  • Publication number: 20150197047
    Abstract: Injection molding parts onto a carrier web located between mold halves, each mold half having a cavity, resulting in molded articles having parts on both sides of the carrier web. Polymer flow into the cavities is assisted by application of ultrasonic energy to the mold. After the molding operation, mold halves are separated, and the carrier web is advanced, or indexed, to a next position for another molding sequence. Articles produced include lenses with part of the carrier web between lens halves, and a carrier web bearing an array of molded parts.
    Type: Application
    Filed: March 23, 2015
    Publication date: July 16, 2015
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Peter T. Benson, Stanley Rendon, Donald L. Pochardt, James N. Dobbs
  • Patent number: 9012011
    Abstract: Injection molding parts onto a carrier web located between mold halves, each mold half having a cavity, resulting in molded articles having parts on both sides of the carrier web. Polymer flow into the cavities is assisted by application of ultrasonic energy to the mold. After the molding operation, mold halves are separated, and the carrier web is advanced, or indexed, to a next position for another molding sequence. Articles produced include lenses with part of the carrier web between lens halves, and a carrier web bearing an array of molded parts.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: April 21, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Peter T. Benson, Stanley Rendon, Donald L. Pochardt, James N. Dobbs
  • Patent number: 8821779
    Abstract: A method of molding a microneedle including providing a mold apparatus having a mold insert having the negative image of at least one microneedle, a compression core, a mold housing configured to allow a reciprocal motion between the mold insert and the compression core. The method includes placing the mold apparatus in a closed position, injecting polymeric material into the closed mold apparatus, compressing the injected polymeric material between the mold insert and the compression core by a reciprocal motion between the compression core and the mold insert, opening the mold, and removing a molded microneedle from the mold. The mold insert has a mold insert height and the molded microneedle has a height that is from about 90% of the mold insert height to about 115% of the mold insert height.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: September 2, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Donald L. Pochardt
  • Publication number: 20140128811
    Abstract: Microneedle arrays made by an injection molding process that uses ultrasonic energy to assist flow of polymer melt into a mold cavity, said microneedles having a high proportion (at least 60%) of fill, i.e., completely formed microneedles across the array. Microneedle array can be on a base or land no more than 250 ?m thick.
    Type: Application
    Filed: January 9, 2014
    Publication date: May 8, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Peter T. Benson, Stanley Rendon, Donald L. Pochardt, James N. Dobbs
  • Patent number: 8637136
    Abstract: Articles enabled by an injection molding process that molds parts on a carrier web located between mold halves and uses ultrasonic energy to assist flow of polymer melt into the mold cavity. One such article is a carrier web having a high density of molded parts, i.e., bearing an array of molded articles adhered to the web in rows and columns, the articles being spaced closer (center-to-center or edge-to-edge) than the diagonal spacing between articles in the next adjacent row and next adjacent column. Another such article is a microneedle array on a land no more than 250 ?m thick on which at least 60% of the microneedles across the array are filled (i.e., completely formed).
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: January 28, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Stanley Rendon, Donald L. Pochardt, James N. Dobbs
  • Publication number: 20130345384
    Abstract: An ultrasonic-assisted injection molding system and method for making precisely-shaped articles. A source of ultrasonic energy is positioned to apply vibrational energy to a mold cavity connected to at least one gate in flow communication with a source of molten (co)polymer. The mold is heated to a temperature of 104-116° C., and the molten (co)polymer is injected into the mold cavity. After cooling the mold until the molten (co)polymer within the gate has solidified, ultrasonic energy is applied to the mold without remelting the solidified (co)polymer within the gate until the temperature increases to 116-122° C., thereby substantially relieving flow induced stresses. The mold is then cooled until the temperature decreases to 101-107° C., and is thereafter heated until the temperature increases to 116-122° C., thereby substantially relieving any thermally induced stresses. The mold is cooled until the molten (co)polymer has solidified, thereby forming a precision molded plastic optical element.
    Type: Application
    Filed: March 14, 2012
    Publication date: December 26, 2013
    Inventors: Stanley Rendon, Dennis E. Ferguson, Donald L. Pochardt, Joseph S. Warner, Timothy J. Rowell, Peter T. Benson, Satinder K. Nayar
  • Publication number: 20130236705
    Abstract: Injection molding parts onto a carrier web located between mold halves, each mold half having a cavity, resulting in molded articles having parts on both sides of the carrier web. Polymer flow into the cavities is assisted by application of ultrasonic energy to the mold. After the molding operation, mold halves are separated, and the carrier web is advanced, or indexed, to a next position for another molding sequence. Articles produced include lenses with part of the carrier web between lens halves, and a carrier web bearing an array of molded parts.
    Type: Application
    Filed: April 24, 2013
    Publication date: September 12, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Peter T. Benson, Stanley Rendon, Donald L. Pochardt, James N. Dobbs
  • Patent number: 8449807
    Abstract: Injection molding parts onto a carrier web located between mold halves, each mold half having a cavity, resulting in molded articles having parts on both sides of the carrier web. Polymer flow into the cavities is assisted by application of ultrasonic energy to the mold. After the molding operation, mold halves are separated, and the carrier web is advanced, or indexed, to a next position for another molding sequence. Articles produced include lenses with part of the carrier web between lens halves, and a carrier web bearing an array of molded parts.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: May 28, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Peter T. Benson, Stanley Rendon, Donald L. Pochardt, Daniel H. Carlson
  • Publication number: 20120280428
    Abstract: A method of molding a microneedle including providing a mold apparatus having a mold insert having the negative image of at least one microneedle, a compression core, a mold housing configured to allow a reciprocal motion between the mold insert and the compression core. The method includes placing the mold apparatus in a closed position, injecting polymeric material into the closed mold apparatus, compressing the injected polymeric material between the mold insert and the compression core by a reciprocal motion between the compression core and the mold insert, opening the mold, and removing a molded microneedle from the mold. The mold insert has a mold insert height and the molded microneedle has a height that is from about 90% of the mold insert height to about 115% of the mold insert height.
    Type: Application
    Filed: July 16, 2012
    Publication date: November 8, 2012
    Inventors: Dennis E. FERGUSON, Satinder K. NAYAR, Donald L. POCHARDT
  • Publication number: 20120263919
    Abstract: Articles enabled by an injection molding process that molds parts on a carrier web located between mold halves and uses ultrasonic energy to assist flow of polymer melt into the mold cavity. One such article is a carrier web having a high density of molded parts, i.e., bearing an array of molded articles adhered to the web in rows and columns, the articles being spaced closer (center-to-center or edge-to-edge) than the diagonal spacing between articles in the next adjacent row and next adjacent column. Another such article is a microneedle array on a land no more than 250 ?m thick on which at least 60% of the microneedles across the array are filled (i.e., completely formed).
    Type: Application
    Filed: June 22, 2012
    Publication date: October 18, 2012
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Peter T. Benson, Stanley Rendon, Donald L. Pochardt, James N. Dobbs, Daniel H. Carlson
  • Publication number: 20120262796
    Abstract: Injection molding parts onto a carrier web located between mold halves, each mold half having a cavity, resulting in molded articles having parts on both sides of the carrier web. Polymer flow into the cavities is assisted by application of ultrasonic energy to the mold. After the molding operation, mold halves are separated, and the carrier web is advanced, or indexed, to a next position for another molding sequence. Articles produced include lenses with part of the carrier web between lens halves, and a carrier web bearing an array of molded parts.
    Type: Application
    Filed: June 22, 2012
    Publication date: October 18, 2012
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Peter T. Benson, Stanley Rendon, Donald L. Pochardt, James N. Dobbs, Daniel H. Carlson
  • Patent number: 8246893
    Abstract: A method of molding a microneedle using a mold apparatus that includes the use of high frequency acoustic energy, such as ultrasonic energy.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: August 21, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Donald L. Pochardt
  • Patent number: 8236231
    Abstract: Injection molding, parts onto a carrier web (34) located between mold halves (18,20). Flow of polymer melt into the mold is assisted by application of ultrasonic energy to the mold cavity. After the molding operation, mold halves are separated, and the carrier web is advanced, or indexed, to a next position for another molding sequence. Molding apparatus comprises a moving mold face (20), that can move toward and away from a first mold member (18) (which can be stationary) in which the mold cavity is located, a means (24,25,26,30,32) for moving and/or indexing carrier web between the first mold member and the moving mold face, means (16) to inject polymer melt into the mold cavity, and an ultrasonic system (42) providing ultrasonic energy to the mold cavity. The carrier web can transport molded parts to subsequent process steps, such as coating, drying, inspection, curing, assembly or packaging.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: August 7, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Peter T. Benson, Stanley Rendon, Donald L. Pochardt, James N. Dobbs, Daniel H. Carlson
  • Patent number: 8088321
    Abstract: A method of molding a microneedle using a mold apparatus that comprises a mold insert (210)having the negative image of at least one microneedle (12), a compression core (240), and a mold housing configured to allow a reciprocal motion between the mold insert and the compression core. The mold apparatus has an open position and a closed position. The mold apparatus is placed in the closed position and polymeric material is injected into the closed mold apparatus. The injected polymeric material is compressed between the mold insert and the compression core by a reciprocal motion between the compression core and the mold insert. Also, molding methods wherein the mold apparatus has sidewalls having an injection gate (270). Also, molding methods comprising a heated mold insert. Also, molding methods comprising the application of high frequency acoustic energy, such as ultrasonic energy, to the mold apparatus.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: January 3, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Donald L. Pochardt
  • Patent number: 7983857
    Abstract: A system for applying ultrasonic energy to a workpiece, the system including a horn stack; a mounting system upon which the horn stack is mounted; a source of energy coupled to the horn stack; an anvil having a surface for supporting the workpiece; and a controller configured to receive a resonant frequency of the horn stack, and to determine a quantity standing in known relation to a change in gap between the horn stack and the anvil.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: July 19, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Donald S. Oblak, Satinder K. Nayar, Paul M. Fettig, Donald L. Pochardt
  • Publication number: 20110163479
    Abstract: A method of molding a microneedle using a mold apparatus that includes the use of high frequency acoustic energy, such as ultrasonic energy.
    Type: Application
    Filed: March 16, 2011
    Publication date: July 7, 2011
    Inventors: Dennis E. Ferguson, Satinder K. Nayar, Donald L. Pochardt
  • Patent number: 7828192
    Abstract: A system and method for maintaining a substantially constant gap between a horn and an anvil includes the act of positioning a horn proximal an anvil, so that a gap is established between the horn and the anvil. An alternating current (AC) signal is applied to a converter coupled to the horn. The AC signal exhibits an amplitude. The amplitude of the AC signal is adjusted during operation of the horn, so as to maintain the gap between the horn and the anvil substantially constant.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: November 9, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Donald L. Pochardt, Satinder K. Nayar, Paul M. Fettig
  • Publication number: 20100276061
    Abstract: A method for adjusting the gap between a horn and an anvil in an ultrasonic welding system includes the act of positioning a horn proximal to an anvil, so that a gap is established between the horn and the anvil. A force is applied to the horn, so as to urge the horn toward the anvil. A deformable stop is positioned at a location, such that application of the urging force causes a member operatively connected to the horn to abut the deformable stop, and to deform the stop. The urging force is iteratively adjusted during operation of the horn, so as to adjust the extent of the deformation of the deformable stop, and to maintain the gap between the horn and the anvil substantially constant.
    Type: Application
    Filed: July 8, 2010
    Publication date: November 4, 2010
    Inventors: Donald S. Oblak, Satinder K. Nayar, John R. Mlinar, Donald L. Pochardt, Paul M. Fettig