Patents Assigned to IBIDENJUSHI CO., LTD.
  • CUTTING DRILL AND METHOD FOR MANUFACTURING PRINTED WIRING BOARD
    Publication number: 20140201995
    Abstract: A cutting drill includes a shank having a hole and formed to be gripped in a tool holder, and a drill body having a rod shape and locked into the hole of the shank. The shank has an axis around which the drill body rotates. The drill body has a cutting-edge portion forming a tip portion of the drill body and a neck portion having a diameter smaller than a diameter of the cutting-edge portion. The cutting-edge portion has a first cutting-edge portion and a second cutting-edge portion formed between the first cutting-edge portion and the neck portion. The first cutting-edge portion is contiguous to the second cutting-edge portion by a step portion such that the second cutting-edge portion has a diameter which is smaller than a diameter of the first cutting-edge portion.
    Type: Application
    Filed: March 25, 2014
    Publication date: July 24, 2014
    Applicants: IBIDENJUSHI CO., LTD., IBIDEN CO., LTD.
    Inventors: Susumu WADA, Shunsuke TAKEICHI, Tomoko SUGIYAMA
  • Cutting drill and method for manufacturing printed wiring board
    Patent number: 8727680
    Abstract: A cutting drill includes a shank having a hole and formed to be gripped in a tool holder, and a drill body having a rod shape and locked into the hole of the shank. The shank has an axis around which the drill body rotates. The drill body has a cutting-edge portion forming a tip portion of the drill body and a neck portion having a diameter smaller than a diameter of the cutting-edge portion. The cutting-edge portion has a first cutting-edge portion and a second cutting-edge portion formed between the first cutting-edge portion and the neck portion. The first cutting-edge portion is contiguous to the second cutting-edge portion by a step portion such that the second cutting-edge portion has a diameter which is smaller than a diameter of the first cutting-edge portion.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: May 20, 2014
    Assignees: Ibiden Co., Ltd., Ibidenjushi Co., Ltd.
    Inventors: Susumu Wada, Shunsuke Takeichi, Tomoko Sugiyama
  • CUTTING DRILL AND METHOD FOR MANUFACTURING PRINTED WIRING BOARD
    Publication number: 20100329802
    Abstract: A cutting drill includes a shank having a hole and formed to be gripped in a tool holder, and a drill body having a rod shape and locked into the hole of the shank. The shank has an axis around which the drill body rotates. The drill body has a cutting-edge portion forming a tip portion of the drill body and a neck portion having a diameter smaller than a diameter of the cutting-edge portion. The cutting-edge portion has a first cutting-edge portion and a second cutting-edge portion formed between the first cutting-edge portion and the neck portion. The first cutting-edge portion is contiguous to the second cutting-edge portion by a step portion such that the second cutting-edge portion has a diameter which is smaller than a diameter of the first cutting-edge portion.
    Type: Application
    Filed: April 30, 2010
    Publication date: December 30, 2010
    Applicants: IBIDEN CO., LTD., IBIDENJUSHI CO., LTD.
    Inventors: Susumu WADA, Shunsuke Takeichi, Tomoko Sugiyama