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
Techniques to manage communications resources for a multimedia conference event
Substituted indolo 4,3 FG quinolines useful for treating migraine
Method of and apparatus for evaluating an optimal irradiation amount of an electron beam for drawing a pattern onto a sample
Semiconductor device and method of adjusting characteristic thereof
Bioactive agent-loaded heart-targeting nanoparticles
Method and system for simulating wireless networks
Monitoring heap in real-time by a mobile agent to assess performance of virtual machine
  Randomly Featured Patents
Cigarette package display rack
Comparative fluorescence hybridization to oligonucleotide microarrays
Shrapnel mitigation and fragmentation control system
Method of changing channels and configuring a sub network in a wireless network
Medical devices having antimicrobial properties
Negative differential resistance (NDR) device and method of operating same
Manufacture of lithographic printing forms
Multiple output multiple step-up rectifier circuit
Method for collecting interstitial fluid from the skin
Needle roller bearing