Resources Contact Us Home
Low-viscosity aqueous ink for a ball-point pen and a ball-point pen

Image Number 4 for United States Patent #5929135.

This invention provides a ball-point pen suited to low-viscosity aqueous ink. This ball-point pen includes a ball-point pen refill in which an ink reservoir communicates with a tip for holding a tip ball via a joint, wherein the ink reservoir is filled with water type ball-point pen ink containing at least one type of a solvent selected from the group consisting of ethyleneglycol, diethyleneglycol, propyleneglycol, and glycerin in an amount of 5 to 40 wt % of the total ink amount, a crosslinking acrylic acid polymer in an amount of 0.1 to 1.0 wt % of the total ink amount, a pigment in an amount of 5 to 10 wt % of the total ink amount, and the balance primarily consisting of water, and the tip has a spring which in a normal state urges and brings the tip ball into intimate contact with the inner edge of a ball holding portion at the front end of the tip and releases the intimate contact when writing is performed.

  Recently Added Patents
Wide bandwidth hybrid antenna for combination EAS and RFID label or tag
Biological analysis arrangement and approach therefor
Nano-pigment inkjet ink composition that has a low odor and is environmentally-friendly
Anti-proliferative and anti-inflammatory agent combination for treatment of vascular disorders with an implantable medical device
Techniques for distributed storage aggregation
Communication apparatus, communication method, and program for exchanging data with a target
Automatically capturing images that include lightning
  Randomly Featured Patents
Systems and methods for saturation correction in a power control loop
Image forming apparatus and image forming method
Cabinet pull
Method of manufacturing all-in-one type light guide plate
LED illumination unit, LED illumination device, and LED illumination system
Unitary wall-mounted shelf
Cleated sole for a sport shoe
Filler neck for the fuel tank of a vehicle
Wear alarm device for a ventilated disk brake
Cushioned protector