Patents by Inventor Shu Hui Chou

Shu Hui Chou 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).

  • Publication number: 20050284858
    Abstract: An electric heat sealer for sealing workpieces such as plastic bags or the like includes a casing defining a battery chamber, a press bar pivotally connected to the casing, a sealing mechanism supported on a compression spring in a spring holder inside the casing, and a safety device. The sealing mechanism is electrically connected to produce heat for sealing the workpiece being put thereon when the press bar pressed against the sealing mechanism. The safety device breaks the electrical circuit when the apparatus is not in use.
    Type: Application
    Filed: August 29, 2005
    Publication date: December 29, 2005
    Inventors: Shu Hui Chou, Richard Chang
  • Patent number: 6936790
    Abstract: An electric heat sealer for sealing workpieces such as plastic bags or the like includes a casing defining a battery chamber, a press bar pivotally connected to the casing, a sealing mechanism supported on a compression spring in a spring holder inside the casing, and a safety device. The sealing mechanism is electrically connected to produce heat for sealing the workpiece being put thereon when the press bar pressed against the sealing mechanism. The safety device breaks the electrical circuit when the apparatus is not in use.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: August 30, 2005
    Inventors: Shu Hui Chou, Richard Chang
  • Publication number: 20050067398
    Abstract: An electric heat sealer comprising a casing including a first pair of extensions extending outwardly therefrom, a press bar pivotally connected to said casing, the press bar including a second pair of extensions extending outwardly therefrom, at least one sealing mechanism mounted in the press bar or the casing and a source of current for energizing the heating wire. The press bar is normally biased above the casing and the at least one sealing mechanism includes a heating wire.
    Type: Application
    Filed: July 9, 2004
    Publication date: March 31, 2005
    Inventors: Shu-Hui Chou, Richard Chang
  • Patent number: 6770849
    Abstract: An electric heat sealer having a casing including a first pair of extensions extending outwardly therefrom, a press bar pivotally connected to said casing, the press bar including a second pair of extensions extending outwardly therefrom, at least one sealing mechanism mounted in the press bar or the casing; wherein the at least one sealing mechanism including a heating wire. The press bar is normally biased above the casing, which includes a source of current for energizing the heating wire.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: August 3, 2004
    Assignee: Welcome Co., Ltd.
    Inventors: Shu-Hui Chou, Richard Chang
  • Patent number: 6627853
    Abstract: An electric heat sealer for sealing workpieces such as plastic bags or the like includes a casing defining a battery chamber, a press bar pivotally connected to the casing, a sealing mechanism supported on a compression spring in a spring holder inside the casing, and a safety device. The sealing mechanism is electrically connected to produce heat for sealing the workpiece being put thereon when the press bar pressed against the sealing mechanism. The safety device breaks the electrical circuit when the apparatus is not in use.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: September 30, 2003
    Assignee: Welcome Company, Ltd.
    Inventors: Shu Hui Chou, Richard Chang
  • Publication number: 20030019861
    Abstract: An electric heat sealer for sealing workpieces such as plastic bags or the like includes a casing defining a battery chamber, a press bar pivotally connected to the casing, a sealing mechanism supported on a compression spring in a spring holder inside the casing, and a safety device. The sealing mechanism is electrically connected to produce heat for sealing the workpiece being put thereon when the press bar pressed against the sealing mechanism. The safety device breaks the electrical circuit when the apparatus is not in use.
    Type: Application
    Filed: December 12, 2000
    Publication date: January 30, 2003
    Applicant: Welcome Co., Ltd.
    Inventors: Shu Hui Chou, Richard Chang
  • Publication number: 20020070206
    Abstract: An electric heat sealer comprising a casing including a first pair of extensions extending outwardly therefrom, a press bar pivotally connected to said casing, the press bar including a second pair of extensions extending outwardly therefrom, at least one sealing mechanism mounted in the press bar or the casing and a source of current for energizing the heating wire. The press bar is normally biased above the casing and the at least one sealing mechanism includes a heating wire.
    Type: Application
    Filed: February 6, 2002
    Publication date: June 13, 2002
    Applicant: Welcome Company Ltd.
    Inventors: Shu-Hui Chou, Richard Chang
  • Patent number: 6335515
    Abstract: An electric heat sealer that has a main body having a longitudinal axis, and a sealing mechanism having a center point. The center point of the sealing mechanism is offset from the longitudinal axis. The electric heat sealer is used for sealing workpieces such as plastic bags or the like and also includes a casing defining a battery chamber and a press bar pivotally connected to the casing. The sealing mechanism is supported on a compression spring in a spring holder inside the casing, and a safety device. The sealing mechanism is electrically connected to produce heat for sealing the workpiece being put thereon when the press bar pressed against the sealing mechanism. The safety device breaks the electrical circuit when the apparatus is not in use.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: January 1, 2002
    Assignee: Welcome Company, Ltd.
    Inventors: Shu Hui Chou, Richard Chang
  • Patent number: 6232579
    Abstract: An electric heat sealer for sealing workpieces such as plastic bags or the like includes a casing defining a battery chamber, a press bar pivotally connected to the casing, a sealing mechanism supported on a compression spring in a spring holder inside the casing, and a safety device. The sealing mechanism is electrically connected to produce heat for sealing the workpiece being put thereon when the press bar pressed against the sealing mechanism. The safety device breaks the electrical circuit when the apparatus is not in use.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: May 15, 2001
    Assignee: Welcome Co., Ltd.
    Inventors: Shu Hui Chou, Richard Chang
  • Patent number: 6032371
    Abstract: A cutting device includes a cutting blade having a cutting edge, and a shell holding the cutting blade on the inside thereof. The shell has an outer edge, and has defined therein a chamber that encompasses at least a portion of the cutting edge of the cutting blade, as well as an insertion slot extending from the chamber to the outer edge of the shell.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: March 7, 2000
    Assignee: Welcome Company Ltd.
    Inventor: Shu Hui Chou
  • Patent number: 5641418
    Abstract: A pen base electric heat sealer including a power supply unit attached with a taper socket at one end to hold dry battery cells and a electric heat seal unit, the electric heat seal unit being separated from the bottom wall of the battery chamber of the power supply unit, and a cap with a clip covered on the taper socket for fastening, whereby the electric heat seal unit is electrically connected to the power supply unit to produce heat for sealing as it is pressed on the workpiece to be sealed; the electric heat seal unit is electrically disconnectted from the power supply unit to stop from producing heat as it is released from the pressure.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: June 24, 1997
    Inventor: Shu Hui Chou
  • Patent number: 5374806
    Abstract: An electric heat sealer comprises a pen-shaped housing including a power supply unit and an end portion, preferably in the form of a tapered socket, containing an electric heat seal unit. The heat seal unit includes a heat sealing tip projecting from an opening in the end portion of the housing. The heat seal unit is movable axially within the housing end portion and includes an electric contact connected to the electric heating element and arranged to engage an electric terminal on the housing to complete an electrical circuit between the power supply unit and the electric heating element. A spring disposed between the one end of the housing and the heat seal unit axially biases the heat seal unit toward the opening in the end portion of the housing sufficiently to separate the contact on the heat seal unit from the terminal on the housing.
    Type: Grant
    Filed: June 24, 1993
    Date of Patent: December 20, 1994
    Inventor: Shu-Hui Chou
  • Patent number: 5142123
    Abstract: A housing supports a pair of insulating posts carrying electrical conductors connected a battery set located in the housing. A nonconductive base carries an exposed electric heating wire on the upper surface thereof, opposite ends of the heating wire being connected to electrically conductive side plates connected on the base, a spring biases the base upwardly so that the side plates are normally spaced from the conductors and the upper part of the base carrying the exposed heating wire extends through a hole in a cover supported by the housing. A press bar is pivoted to the housing and can be moved downwardly to engage an object to be sealed supported on the upper part of the base in contact with the exposed heating wire to urge the base downwardly and cause the side plates to engage the conductors and heat the heating wire.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: August 25, 1992
    Inventor: Shu-Hui Chou
  • Patent number: D328750
    Type: Grant
    Filed: April 17, 1990
    Date of Patent: August 18, 1992
    Inventor: Shu-Hui Chou
  • Patent number: D347187
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: May 24, 1994
    Inventor: Shu-Hui Chou
  • Patent number: D349439
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: August 9, 1994
    Inventor: Shu-Hui Chou