Patents by Inventor Kwok Ki Stephen Chan

Kwok Ki Stephen Chan 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: 8740032
    Abstract: An electric stapler (10) is disclosed as including a stapling head (12) with a driver (28), an intermediate magazine (14) for carrying staples each with two legs, a base part (16) carrying two anvils (44), cams (24), and eccentrically mounted wheels (52), in which the stapling head (12), intermediate magazine (14) and base part (16) are movable relative to one another, the eccentrically mounted wheels (52) are rotatable to move the stapling head (12) and intermediate magazine (14) relative to each other and relative to the base part (16) whereby the driver (28) of the stapling head (12) drives a staple away from the magazine (14), and the cams (24) are rotatable to move a movement transmission assembly (30) to move the anvils (44) to bend the legs of the staple.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: June 3, 2014
    Assignee: Lee Tack Stationary Manufactory Limited
    Inventor: Kwok Ki Stephen Chan
  • Publication number: 20120181321
    Abstract: An electric stapler (10) is disclosed as including a stapling head (12) with a driver (28), an intermediate magazine (14) for carrying staples each with two legs, a base part (16) carrying two anvils (44), cams (24), and eccentrically mounted wheels (52), in which the stapling head (12), intermediate magazine (14) and base part (16) are movable relative to one another, the eccentrically mounted wheels (52) are rotatable to move the stapling head (12) and intermediate magazine (14) relative to each other and relative to the base part (16) whereby the driver (28) of the stapling head (12) drives a staple away from the magazine (14), and the cams (24) are rotatable to move a movement transmission assembly (30) to move the anvils (44) to bend the legs of the staple.
    Type: Application
    Filed: January 13, 2011
    Publication date: July 19, 2012
    Applicant: LEE TACK STATIONERY MANUFACTORY LTD.
    Inventor: Kwok Ki Stephen CHAN
  • Patent number: 8096217
    Abstract: A base for a paper punch includes an upper jaw, a lower jaw, and first and second bifurcated supports, fixedly secured with the upper and lower jaws. The base has first and second legs. A rear end of the upper jaw is fixedly joined with a rear end of the lower jaw. Each bifurcated support has upper and lower forks spaced apart from each other at a front end and fixedly joined with each other at a rear end. The forks are fixedly secured with respective lateral sides of the respective jaws. First ends of the legs are fixedly secured to either or both of the upper jaw and lower jaw, with a second end of the first leg fixedly secured to the rear end of the first bifurcated support. The second end of the second leg is fixedly secured to the rear end of the second bifurcated support.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: January 17, 2012
    Assignee: Lee Tack Plastic & Manufactory Ltd.
    Inventor: Kwok Ki Stephen Chan
  • Patent number: 7971513
    Abstract: A paper punch die (125) is disclosed as including a top part (110, 202, 302) and a platform (100, 206, 306) engaged with each other, the platform (100, 206, 306) having an upper major surface (106) and a lower major surface (126, 207, 307), the upper major surface of the platform (100, 206, 306) being in abutment with a lower major surface (118) of the top part (110, 202, 302), and an endless wall (130) with an undulating cutting edge (132) extending away from the lower major surface (126, 207, 307) of the platform (100, 206, 306). There is also disclosed a paper punch (140) including such a paper punch die (125).
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: July 5, 2011
    Assignee: Lee Tack Plastic & Metal Manufactory, Ltd.
    Inventor: Kwok Ki Stephen Chan
  • Patent number: 7784386
    Abstract: A paper cutting apparatus is disclosed as including a cylindrical cutting roller with a number of closed-loop cutting ridges on its outer cylindrical surface and a support roller, in which the cutting roller is rotatable relative to the support roller to move a piece of paper or cardboard material relative to and between the cutting roller and support roller to cut out part of the piece of paper or cardboard material.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: August 31, 2010
    Assignee: Lee Tack Plastic & Metal Manufactory Ltd
    Inventor: Kwok Ki Stephen Chan
  • Patent number: 7739936
    Abstract: A paper punch 100, 200 is disclosed as including a button 110, a die 104, and a die holder 106, 210 with an upper jaw 114, 208 and a lower jaw 116 which are spaced apart from each other, in which the button 110 is operable to move the die 104 relative to the die holder 106, 210 to punch at least a piece of paper out from a sheet of paper 117 received within the paper punch 117, and the die holder 106, 210 includes a wheel 120, 202 for limiting the extent of relative movement between the upper jaw 114, 208 and the lower jaw 116.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: June 22, 2010
    Assignee: Lee Tack Plastic & Metal Manufacturing Ltd
    Inventor: Kwok Ki Stephen Chan
  • Patent number: 7726227
    Abstract: A method of forming a base (118) for a paper punch (154) is disclosed as including the steps of (a) providing a cast iron core (102) with a wall (104) and a plate (106) with a hole (108); (b) providing two generally U-shaped cast iron plates (110); (c) positioning the plates (110) spaced apart from and on opposite sides of the core (102); and (d) insert-molding the core (102) and plates (106) with a plastics material, e.g. ABS.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: June 1, 2010
    Assignee: Lee Tack Plastic & Metal Manufactory, Ltd.
    Inventor: Kwok Ki Stephen Chan
  • Publication number: 20090235801
    Abstract: A base for a paper punch is disclosed as including an upper jaw with a front end and a rear end, a lower jaw with a front end and a rear end, a first and a second bifurcated supports, both fixedly secured with the upper jaw and the lower jaw, and a first and a second legs, each with a first end and a second end, in which the front end of the lower jaw is spaced apart from the front end of the upper jaw, and being adapted to allow insertion of a piece of paper for punching; and the rear end of the upper jaw is fixedly joined with the rear end of the lower jaw; and each of the first and second bifurcated supports has an upper fork and a lower fork which are spaced apart from each other at a front end and fixedly joined with each other at a rear end; and the upper forks of the bifurcated supports are fixedly secured with a respective lateral side of the upper jaw; and the lower forks of the bifurcated supports are fixedly secured with a respective lateral side of the lower jaw; and the first ends of the legs are
    Type: Application
    Filed: March 19, 2008
    Publication date: September 24, 2009
    Applicant: LEE TACK PLASTIC & METAL MANUFACTORY LTD.
    Inventor: Kwok Ki Stephen CHAN
  • Publication number: 20090188365
    Abstract: A method of forming a base for a paper punch is disclosed as including the steps of (a) forming two generally U-shaped plates of a first metal or metal alloy, and (b) fixedly engaging the generally U-shaped plates with a core part of a second metal or metal alloy, in which the plates are in direct contact with the core part. A base for a paper punch is disclosed as including two generally U-shaped plates of a first metal or metal alloy, and a core part of a second metal or metal alloy which is fixedly engaged with the U-shaped plates, and the plates are in direct contact with the core part.
    Type: Application
    Filed: January 25, 2008
    Publication date: July 30, 2009
    Applicant: Lee Tack Plastic & Metal Manufactory Ltd.
    Inventor: Kwok Ki Stephen Chan
  • Publication number: 20090000439
    Abstract: A paper cutting apparatus is disclosed as including a cylindrical cutting roller with a number of closed-loop cutting ridges on its outer cylindrical surface and a support roller, in which the cutting roller is rotatable relative to the support roller to move a piece of paper or cardboard material relative to and between the cutting roller and support roller to cut out part of the piece of paper or cardboard material.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Applicant: LEE TACK PLASTIC & METAL MANUFACTORY LTD.
    Inventor: Kwok Ki Stephen CHAN
  • Publication number: 20080184862
    Abstract: A paper punch die (125) is disclosed as including a top part (110, 202, 302) and a platform (100, 206, 306) engaged with each other, the platform (100, 206, 306) having an upper major surface (106) and a lower major surface (126, 207, 307), the upper major surface of the platform (100, 206, 306) being in abutment with a lower major surface (118) of the top part (110, 202, 302), and an endless wall (130) with an undulating cutting edge (132) extending away from the lower major surface (126, 207, 307) of the platform (100, 206, 306). There is also disclosed a paper punch (140) including such a paper punch die (125).
    Type: Application
    Filed: February 1, 2007
    Publication date: August 7, 2008
    Applicant: LEE TACK PLASTIC & METAL MANUFACTORY LTD.
    Inventor: Kwok Ki Stephen Chan
  • Publication number: 20080184859
    Abstract: A method of forming a base (118) for a paper punch (154) is disclosed as including the steps of (a) providing a cast iron core (102) with a wall (104) and a plate (106) with a hole (108); (b) providing two generally U-shaped cast iron plates (110); (c) positioning the plates (110) spaced apart from and on opposite sides of the core (102); and (d) insert-moulding the core (102) and plates (106) with a plastics material, e.g. ABS.
    Type: Application
    Filed: February 1, 2007
    Publication date: August 7, 2008
    Applicant: LEE TACK PLASTIC & METAL MANUFACTORY LTD.
    Inventor: Kwok Ki Stephen CHAN
  • Publication number: 20080168877
    Abstract: A paper punch die 102 is disclosed as including an upper part 104 and a lower part 106 which are fixedly secured with each other, in which the lower part 106 includes a wall 116 with a cutting edge 118, in which the upper part 104 is made of a plastics material, and the lower part 106 is made of a metal or metal alloy.
    Type: Application
    Filed: January 16, 2007
    Publication date: July 17, 2008
    Applicant: LEE TACK PLASTIC & METAL MANUFACTORY LTD.
    Inventor: Kwok Ki Stephen Chan
  • Publication number: 20080168878
    Abstract: A paper punch 100, 200 is disclosed as including a button 110, a die 104, and a die holder 106, 210 with an upper jaw 114, 208 and a lower jaw 116 which are spaced apart from each other, in which the button 110 is operable to move the die 104 relative to the die holder 106, 210 to punch at least a piece of paper out from a sheet of paper 117 received within the paper punch 117, and the die holder 106, 210 includes a wheel 120, 202 for limiting the extent of relative movement between the upper jaw 114, 208 and the lower jaw 116.
    Type: Application
    Filed: January 16, 2007
    Publication date: July 17, 2008
    Applicant: LEE TACK PLASTIC & METAL MANUFACTORY LTD.
    Inventor: Kwok Ki Stephen CHAN