Patents by Inventor Maria Teresa A. Castillo

Maria Teresa A. Castillo 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: 8943969
    Abstract: A method of improving performance of a relief image printing plate on a printing cylinder which includes mounting a compressible cushion element on a surface of the printing cylinder. The surface of the cushion element that is contactable with the relief image printing plate is a low friction surface that allows a relief image printing plate to slide freely across its surface and settle into position on the printing cylinder. The use of a cushion element having a low friction surface reduces smut and improves registration of the printing plate on the printing cylinder.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: February 3, 2015
    Inventors: Maria Teresa A. Castillo, Jeffrey Knight
  • Publication number: 20090211480
    Abstract: A method of improving performance of a relief image printing plate on a printing cylinder which includes mounting a compressible cushion element on a surface of the printing cylinder. The surface of the cushion element that is contactable with the relief image printing plate is a low friction surface that allows a relief image printing plate to slide freely across its surface and settle into position on the printing cylinder. The use of a cushion element having a low friction surface reduces smut and improves registration of the printing plate on the printing cylinder.
    Type: Application
    Filed: February 26, 2008
    Publication date: August 27, 2009
    Inventors: Maria Teresa Castillo, Jeffrey Knight
  • Patent number: 6780566
    Abstract: In accordance with the present invention, there are provided high performance, photoimageable resin compositions for flexographic printing, having excellent physical properties, e.g., resilience, hardness, toughness, and the like, as well as increased rates of cure upon exposure to radiation. In a further aspect of the invention, there are provided printing plates prepared employing invention compositions, wherein said printing plates are characterized as having excellent exposure sensitivity, the capability of rapidly curing upon exposure, excellent retention of fine details, and excellent colorless performance. Moreover, printing plates prepared employing invention compositions have good flexibility, excellent washout properties, and retain such properties over extended periods of storage. In another aspect of the invention, there are provided methods for the preparation of formulations comprising said compositions and methods for use thereof.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: August 24, 2004
    Assignee: Napp Systems, Inc.
    Inventors: Yuxin Hu, David H. Roberts, Reny R. Paguio, Maria Teresa A. Castillo
  • Publication number: 20040146806
    Abstract: An improved photopolymerizable resin composition for use in making flexographic printing plates, wherein the resin composition comprises a base polymer, a reactive crosslinking agent, a photoinitiator, and a nanoparticle-sized filler. Printing plates produced using the improved compositions of the invention have increased toughness, less tack, reduced cold flow, and higher hardness as compared to prior art compositions that do not contain nanoparticle fillers.
    Type: Application
    Filed: January 29, 2003
    Publication date: July 29, 2004
    Inventors: David H. Roberts, Geoffrey Yuxin Hu, Maria Teresa A. Castillo
  • Publication number: 20030175622
    Abstract: In accordance with the present invention, there are provided high performance, photoimageable resin compositions for flexographic printing, having excellent physical properties, e.g., resilience, hardness, toughness, and the like, as well as increased rates of cure upon exposure to radiation. In a further aspect of the invention, there are provided printing plates prepared employing invention compositions, wherein said printing plates are characterized as having excellent exposure sensitivity, the capability of rapidly curing upon exposure, excellent retention of fine details, and excellent colorless performance. Moreover, printing plates prepared employing invention compositions have good flexibility, excellent washout properties, and retain such properties over extended periods of storage. In another aspect of the invention, there are provided methods for the preparation of formulations comprising said compositions and methods for use thereof.
    Type: Application
    Filed: March 11, 2003
    Publication date: September 18, 2003
    Applicant: Napp Systems, Inc.
    Inventors: Yuxin Hu, David H. Roberts, Reny R. Paguio, Maria Teresa A. Castillo
  • Patent number: 6579664
    Abstract: In accordance with the present invention, there are provided high performance, photoimageable resin compositions for flexographic printing, having excellent physical properties, e.g., resilience, hardness, toughness, and the like, as well as increased rates of cure upon exposure to radiation. In a further aspect of the invention, there are provided printing plates prepared employing invention compositions, wherein said printing plates are characterized as having excellent exposure sensitivity, the capability of rapidly curing upon exposure, excellent retention of fine details, and excellent colorloss performance. Moreover, printing plates prepared employing invention compositions have good flexibility, excellent washout properties, and retain such properties over extended periods of storage. In another aspect of the invention, there are provided methods for the preparation of formulations comprising said compositions and methods for use thereof.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: June 17, 2003
    Assignee: Napp Systems, Inc.
    Inventors: Yuxin Hu, David H. Roberts, Reny R. Paguio, Maria Teresa A. Castillo
  • Publication number: 20020172875
    Abstract: In accordance with the present invention, there are provided high performance, photoimageable resin compositions for flexographic printing, having excellent physical properties, e.g., resilience, hardness, toughness, and the like, as well as increased rates of cure upon exposure to radiation. In a further aspect of the invention, there are provided printing plates prepared employing invention compositions, wherein said printing plates are characterized as having excellent exposure sensitivity, the capability of rapidly curing upon exposure, excellent retention of fine details, and excellent colorloss performance. Moreover, printing plates prepared employing invention compositions have good flexibility, excellent washout properties, and retain such properties over extended periods of storage. In another aspect of the invention, there are provided methods for the preparation of formulations comprising said compositions and methods for use thereof.
    Type: Application
    Filed: March 30, 2001
    Publication date: November 21, 2002
    Inventors: Yuxin Hu, David H. Roberts, Reny R. Paguio, Maria Teresa A. Castillo
  • Patent number: 5683837
    Abstract: In accordance with the present invention, water-developable photopolymerizable compositions useful for the preparation of durable printing plates capable of providing very high levels of resolution have been developed. Printing plates prepared employing invention compositions, once photopolymerized, have excellent physical properties, enabling their use in many very demanding applications, e.g., commercial letterpress and newspaper printing. Such applications require the photopolymerized resin to provide a sharp image and good durability after curing. Photopolymerization of invention resin yields a product with excellent physical characteristics, acceptable by letterpress printing standards. In addition, photopolymerization of invention composition provides a product which demonstrates sufficient toughness to be used for extended printing runs as required in such areas as metal decorating, newspaper, plastic packaging, business forms, and the like.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: November 4, 1997
    Assignee: Napp Systems, Inc.
    Inventors: David H. Roberts, Maria Teresa A. Castillo